JP3090819B2 - Vibration propagation prevention system for surrounding structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a vibration source such as a press factory or a facility that accommodates a large number of spectators and performs various events and competitions such as rock concerts and baseball games. The present invention relates to a system for preventing vibration from propagating to a surrounding structure, which prevents unpleasant vibration from propagating to a structure.

[0002]

2. Description of the Related Art In a press factory as described above, the operation of a press machine is performed, and in a facility where various events and competitions are performed, a human jumping or violent movement causes a large enclosed space such as a dome. In the facility by, vibrations caused by stepping, jumping, etc. give a continuous impact force to the ground, and this impact force causes very large ground vibrations, which are caused by nearby buildings, offices,
There was a problem that the vertical structure or horizontal vibration of the surrounding structures such as a private house was induced, and the living environment of the neighboring residents was deteriorated.

[0003]

However, in order to solve the above-mentioned problems, conventionally, in a structure serving as a vibration source, an elastic material is interposed between a floor and a foundation, and the ground is moved from the vibration source to the ground. However, it was only enough to weaken the impact force applied to the tire, and could not be effectively eliminated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and a system for preventing vibration from propagating to a peripheral structure according to the first aspect of the present invention provides a system for preventing vibration from being transmitted from a structure serving as a vibration source to a neighboring structure. It is an object to prevent the propagation of unpleasant vibration to a structure. Another object of the present invention is to provide a system for preventing vibration from propagating to a peripheral structure, which can more effectively prevent the propagation of the unpleasant vibration described above. A third object of the present invention is to provide a system for preventing the propagation of unpleasant vibrations in response to a change in vibration at a vibration source. I do. In addition, the system for preventing vibration from propagating to a peripheral structure according to the fourth aspect of the present invention provides a system for preventing unpleasant vibration from a structure serving as a vibration source to a neighboring structure even when there is vibration noise from sources other than the vibration source. An object is to make it possible to prevent propagation satisfactorily. Claim 5
The system for preventing vibration propagation to the peripheral structure according to the invention according to
It is an object of the present invention to effectively prevent the propagation of the unpleasant vibration described above, while reducing the size of the device. A further object of the present invention is to provide a system for preventing the propagation of unpleasant vibrations to a peripheral structure according to the present invention. Claim 7
The system for preventing vibration propagation to the peripheral structure according to the invention according to
It is an object of the present invention to effectively prevent the propagation of the unpleasant vibration described above in response to a change in vibration at the vibration source.
In addition, the system for preventing vibration from propagating to a peripheral structure according to the invention of claim 8 is capable of preventing an unpleasant vibration from a structure serving as a vibration source to a nearby peripheral structure even when there is vibration noise from sources other than the vibration source. An object is to make it possible to prevent propagation satisfactorily. Further, the system for preventing vibration propagation to the peripheral structure according to the ninth aspect of the present invention is a vibration source even if there is vibration noise from sources other than the vibration source with a simple control configuration using a reasonable filter. It is an object of the present invention to favorably prevent propagation of unpleasant vibrations from a structure to a nearby structure.

[0005]

According to a first aspect of the present invention, there is provided a system for preventing vibration from propagating to a peripheral structure, in order to achieve the above-described object, a portion close to a foundation of a structure serving as a vibration source. A vibration exciter is installed on the base via a base stand, and a vibration sensor that measures the vibration of the ground around the foundation is provided.Based on the vibration measured by the vibration sensor, a vibration is generated so as to cancel the vibration. The vibration device is provided with control means for outputting a control signal.

A second aspect of the present invention provides a system for preventing vibration from propagating to a peripheral structure according to the first aspect of the present invention. Is configured to be supported on the supporting ground via an elastic body.

A third aspect of the present invention provides a system for preventing vibration from propagating to a peripheral structure according to the second aspect of the present invention. The elastic body is configured so that its natural frequency can be changed and controlled, and a third vibration sensor for measuring the vibration of the base frame is provided. Based on the vibration sensor and the vibration measured by the third vibration sensor, the elastic body A vibration amplification control mechanism is provided for changing the natural frequency of the base gantry supported by the above and causing it to resonate, and following the change in the frequency of the ground vibration.

In order to achieve the above object, the system for preventing vibration from propagating to a peripheral structure according to the fourth aspect of the present invention is directed to the peripheral structure according to any one of the first to third aspects of the invention. A filter for removing a vibration component from sources other than the vibration source is attached to the vibration sensor in the vibration propagation prevention system, and a control signal is output to the control means based on the vibration passing through the filter.

According to a fifth aspect of the present invention, there is provided a system for preventing vibration from propagating to a peripheral structure in order to achieve the above-mentioned object. An exciter is provided via the gantry, and a second vibration sensor is provided around the base gantry to measure the vibration transmitted from the structure to the peripheral structure, and based on the vibration measured by the second vibration sensor, Control means for outputting a control signal to the vibration generating device is provided so as to generate vibration for canceling the vibration.

In order to achieve the above object, the system for preventing vibration propagation to a peripheral structure according to the invention of claim 6 is a system for preventing vibration propagation to a peripheral structure according to the invention of claim 5. Is configured to be supported on the supporting ground via an elastic body.

According to a seventh aspect of the present invention, there is provided a system for preventing vibration from propagating to a peripheral structure according to the sixth aspect of the present invention. The elastic body is configured so that its natural frequency can be changed and controlled, and a third vibration sensor for measuring the vibration of the base frame is provided. Based on the vibration measured by the second and third vibration sensors, the elastic body A vibration amplification control mechanism is provided for changing the natural frequency of the base gantry supported by the above and causing it to resonate, and following the change in the frequency of the ground vibration.

In order to achieve the above object, the system for preventing vibration from propagating to a peripheral structure according to the invention of claim 8 is directed to the peripheral structure according to any one of claims 5 to 7. A filter for removing a vibration component from sources other than the vibration source is attached to the second vibration sensor in the vibration propagation prevention system, and a control signal is output to the control means based on the vibration passing through the filter.

In order to achieve the above object, the system for preventing vibration propagation to a peripheral structure according to the ninth aspect of the present invention provides the vibration propagation to a peripheral structure according to the fourth or eighth aspect of the invention. The filter in the prevention system is composed of a single-degree-of-freedom system filter.

[0014]

According to the structure of the system for preventing vibration from propagating to a peripheral structure according to the first aspect of the present invention, when vibration occurs in the structure serving as a vibration source, a control signal is output from the control means to the vibration generating device, Vibration that cancels the generated vibration is generated by the vibration generating device, and the propagation of the vibration itself from the structure that is the vibration source to the periphery of the ground that supports the structure can be prevented.

Further, according to the structure of the system for preventing vibration from propagating to the peripheral structure according to the second aspect of the present invention, the vibration applied to the ground from the vibration generating device via the base frame is amplified by the elastic body, and the vibration is generated. Even if the vibrating force of the device is small, a large control vibration can be applied to the ground.

According to the third aspect of the present invention, the natural frequency of the elastic body is adjusted to the frequency of the vibration generated in the structure serving as the vibration source. With the phase shifted by half a wavelength, amplified vibration for canceling vibration propagating from the structure can be always applied to the ground via the base and the elastic body.

According to the configuration of the system for preventing vibration from propagating to the peripheral structure according to the fourth aspect of the present invention, since the frequency applied from the vibration source can be specified in advance, even if there is vibration noise from sources other than the vibration source. The vibration component that removes the vibration component and cancels the generated vibration only based on the vibration from the vibration source is generated by the vibration generator, and the vibration from the structure that is the vibration source to the periphery of the ground that supports it is generated. Propagation can be prevented.

Further, according to the structure of the system for preventing propagation of vibration to a peripheral structure according to the invention of claim 5, vibration is generated in a structure serving as a vibration source, and the vibration is generated on a predetermined peripheral structure side of the periphery. When it propagates to the base stand provided in the middle of the above, a control signal is output from the control means to the vibrating device, and the vibration that cancels the generated vibration is generated by the vibrating device, and the vibration is applied to the ground via the base mount. However, propagation of vibration can be cut off at an intermediate point between the structure serving as the vibration source and the peripheral structure.

Further, according to the structure of the system for preventing vibration from propagating to the peripheral structure according to the invention of claim 6, the vibration applied to the ground from the vibrating device via the base gantry is amplified by the elastic body to generate vibration. Even if the vibrating force of the device is small, a large control vibration can be applied to the ground.

Further, according to the configuration of the system for preventing vibration from propagating to a peripheral structure according to the present invention, the natural frequency of the elastic body is adjusted to the frequency of vibration generated in the structure serving as the vibration source. With the phase shifted by half a wavelength, amplified vibration for canceling vibration propagating from the structure can be always applied to the ground via the base and the elastic body.

According to the configuration of the system for preventing vibration from propagating to the peripheral structure according to the invention of claim 8, since the frequency applied from the vibration source can be specified in advance, even if there is vibration noise from sources other than the vibration source. The vibration component that removes the vibration component and cancels the generated vibration only based on the vibration from the vibration source is generated by the vibration generator, and the vibration from the structure that is the vibration source to the periphery of the ground that supports it is generated. Propagation can be prevented.

Further, according to the configuration of the system for preventing vibration propagation to the peripheral structure according to the ninth aspect of the present invention, the one-degree-of-freedom filter has a transfer function as shown in FIG. As shown in FIG. 15A, vibration noise from sources other than the vibration source can be removed. In addition, focusing on the fact that a 90 ° phase delay is caused by the one-degree-of-freedom system filter, furthermore, when a vibration damping force is applied by a vibration device, the 90 ° Together with the phase delay, a phase delay of 180 ° naturally occurs as a whole, and a force for canceling the vibration from the vibration source can be applied without performing phase compensation.

[0023]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

<First Embodiment> FIG. 1 is an overall schematic longitudinal sectional view showing a first embodiment of a system for preventing vibration propagation to a peripheral structure according to the present invention, in which a pile foundation 2 is constructed on a ground 1. At the same time, a foundation 3 is constructed on the pile foundation 2..., A dome D as a structure serving as a vibration source is constructed on the foundation 3, and an elastic body is formed at a location close to the foundation 3. A base frame 5 is provided via first air springs 4. A vibration device 6 for preventing the vibration generated by the dome D from propagating to the ground 1 on the base frame 5.
... are provided.

As shown in the side view of the main part of FIG. 2, each of the vibrating devices 6 has arms 8a, 8b having weights 7a, 7b connected to their ends, and concentric horizontal directions driven by electric motors 9a, 9b. Are rotatable in opposite directions about the axis of the shaft and are rotatable so as to be directed in the same direction only in the vertical direction, so that vertical vibration can be generated by the centrifugal force of the weights 7a and 7b. Is configured.

At a predetermined location on the ground 1 around the foundation 2, a vibration sensor 10 for measuring the vibration of the surrounding ground 1 is provided.
The vibration sensor 10 has a controller 1 as a control unit.
1 is connected to the controller 11 and the controller 12 of the electric motors 9a and 9b is connected to the controller 11 so as to generate a vibration necessary for canceling the vibration based on the vibration measured by the vibration sensor 10. Signal to controller 12
And the vibrations generated by the vibration generator 6 can be controlled by changing the rotation speed of the electric motors 9a and 9b.

A compressor 16 is connected to the first air springs 4 via a pipe 15 having a flow control valve 14 interposed therebetween, and a vibration generated by the vibration generator 6 is measured on the base frame 5. A third vibration sensor 17, the vibration sensor 10 and the third vibration sensor 17 are connected to a second controller 18, and the flow rate control valve 14 is connected to the second controller 18; Based on the vibrations measured by the vibration sensor 10 and the third vibration sensor 17, the internal pressure on the first air springs 4 is adjusted, the natural frequency of the base frame 5 is changed to resonate, and the A vibrating force amplification control mechanism is configured to follow the change.

With the above structure, even if vibrations are generated in the dome D due to the jumping movement of the audience at the time of a rock concert or the like, the vibration generating devices 6 are automatically operated according to the generated vibrations. Then, a vibration that cancels the generated vibration is generated, and the propagation of the vibration itself from the foundation 3 to the ground 1 can be prevented.

That is, as shown in the schematic side view of FIG. 3A, when a vibration is generated in the dome D, a vibration W1 due to the impact force f is generated via the ground 1 by the peripheral structure 13
However, even if the vibration W1 is generated in the dome D by the operation of the vibration generating devices 6, the vibration damping force F for the vibration W1 is applied to the ground near the foundation 3, and the vibration W2 that cancels the vibration W1 is generated. 3B, the vibration W propagated to the peripheral structure 13 is reduced, and the unpleasant vibration propagates, as shown in the schematic side view of FIG. Prevent it.

At this time, by operating the above-described excitation force amplification control mechanism and adjusting the natural frequency of the first air springs 4... In accordance with the frequency of the vibration propagating from the foundation 3 to the ground 1, the vibration applied to the ground 1 from the foundation gantry 5 is resonated in a state shifted by a half wavelength to effectively amplify the vibration. Even if it changes, the vibration can be effectively prevented from propagating to the peripheral structure 13 in accordance with the change.

<Second Embodiment> FIG. 4 is an overall schematic longitudinal sectional view showing a second embodiment of a system for preventing vibration propagation to a peripheral structure according to the present invention. A solid foundation 19 is constructed on the ground 1 at an intermediate point (see FIG. 6) where the linear connection is made, and a foundation mount 21 is constructed on the solid foundation 19 via a second air spring 20 as an elastic body. Exciters 6 are provided on the base stand 21 to prevent the vibration generated in the dome D from propagating to the peripheral structure 13.

As shown in the side view of the main part of FIG. 5, each of the vibrating devices 6 has arms 8a and 8b having weights 7a and 7b connected to their ends, and concentric horizontal directions driven by electric motors 9a and 9b. Are rotatable in opposite directions about the axis of the shaft and are rotatable so as to be directed in the same direction only in the vertical direction, so that vertical vibration can be generated by the centrifugal force of the weights 7a and 7b. Is configured. This configuration is the same as in the first embodiment.

At a predetermined position of the ground 1 around the solid foundation 19, a second vibration sensor 22 for measuring vibration generated in the dome D and propagated to the peripheral structure 13 is provided.
A third controller 23 as a control means is connected to the vibration sensor 22, and the controller 12 of the electric motors 9 a and 9 b is connected to the third controller 23 and measured by the second vibration sensor 22. Based on the vibration
A control signal for generating a vibration necessary for canceling the vibration is output to the controller 12, and the rotation speed of the electric motors 9a and 9b is changed to control the vibration generated by the vibration generator 6. ing.

A compressor 16 is connected to the second air spring 20 via a pipe 15 having a flow control valve 14 interposed therebetween, as in the first embodiment.
A third vibration sensor 17 for measuring the vibration generated by the vibration generator 6 is provided. The third vibration sensor 17 and the second vibration sensor 22 are connected to a second controller 18 and the second The flow control valve 14 is connected to the controller 18 of the second type, and based on the vibration measured by the second vibration sensor 22 and the third vibration sensor 17,
Of the air springs 20.
The excitation force amplification control mechanism is configured to change the natural frequency of the ground vibration to resonate and follow the change in the vibration frequency of the ground vibration.

With the above configuration, in the dome D, vibration is generated due to the jumping motion of the audience at the time of a rock concert or the like, and the generated vibration propagates to the ground 1 and further to the peripheral structure 13 side. Even when the vibration propagates, the vibration generating devices 6 are automatically operated in response to the vibration to generate vibration that cancels the generated vibration, and the vibration propagates from the foundation 3 to the peripheral structure 13 via the ground 1. Can be prevented.

That is, as shown in the schematic side view of FIG. 6A, when a vibration is generated in the dome D, a vibration W1 due to the impact force f is generated through the ground 1 through the peripheral structure 13
However, the vibration of the base pedestal 21 is caused by the operation of the vibration generators 6...
From the ground to the ground 1, the vibration W propagated to the ground 1
6 is applied to the ground 1 at an intermediate position between the dome D and the peripheral structure 13 to generate a vibration W2 that cancels the vibration W1, and as shown in the schematic side view of FIG. The vibration W that propagates from the base 3 to the peripheral structure 13 via the ground 1 is reduced, and unpleasant vibration is prevented from propagating.

At this time, the above-described amplification control mechanism is operated, and even if the frequency of the vibration generated in the dome D changes as in the first embodiment, the change can be effectively made in accordance with the change. Vibration can be prevented from propagating to the peripheral structure 13.

<Third Embodiment> FIG. 7 is a side view of a main part of a third embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention. It is as follows. That is, the vibration generating device 6 is configured by supporting the heavy object 24 on the base frame 21 via the double-acting air cylinder 25, and based on the vibration measured by the second vibration sensor 22, A control signal for generating a vibration necessary to cancel the vibration is output to a control valve (not shown) of the air cylinder 25 so that the vibration generated by the vibration generator 6 can be controlled by driving the heavy object 24 up and down. Is configured. The other configuration is the same as that of the second embodiment, and the description thereof will be omitted by retaining the same reference numerals. The vibration generating device 6 of the third embodiment may be applied to the first embodiment.

<Fourth Embodiment> FIG. 8 is a side view of a main part showing a fourth embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention. It is as follows. That is, the vibration generating device 6 is configured by supporting the base gantry 21 itself via the double-acting air cylinder 26, and is necessary for canceling the vibration based on the vibration measured by the second vibration sensor 22. A control signal for generating an appropriate vibration is output to a control valve (not shown) of the air cylinder 26, and the vibration generated by the vibration generator 6 can be controlled by driving the base frame 21 up and down reciprocally. I have. The other configuration is the same as that of the second embodiment, and the description thereof will be omitted by retaining the same reference numerals. The vibration generating device 6 of the fourth embodiment may be applied to the first embodiment.

<Fifth Embodiment> FIG. 9 is an overall schematic longitudinal sectional view showing a fifth embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention.
It is as follows. That is, the solid foundation 19 is supported by the underground structure 28 via the third air springs 27.
The other configuration is the same as that of the second embodiment, and the description thereof will be omitted by retaining the same reference numerals.

<Sixth Embodiment> FIG. 10 is an overall schematic longitudinal sectional view showing a sixth embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention. It is as follows. That is, the underground structure 28 is
9 are supported on the supporting ground 30. The other configuration is the same as that of the fifth embodiment, and the description thereof will be omitted by retaining the same reference numerals.

<Seventh Embodiment> FIG. 11 is a block diagram showing a seventh embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention.
1, the phase compensation circuit 32 and the driver 33 constitute the controller 11, and a signal based on the vibration measured by the vibration sensor 10 is input to the band-pass filter 31 that removes a vibration component other than the vibration from the dome D. At the same time, the signal passed through the band-pass filter 31 is input to a driver 33 via a phase compensation circuit 32 for eliminating a phase shift. Further, a signal based on the vibration measured by each of the vibration sensor 10 and the third vibration sensor 17 is input to the second controller 18. The other configuration is the same as that of the first embodiment, and the description is omitted by assigning the same numbers.

According to the configuration of the seventh embodiment, of the vibrations measured by the vibration sensor 10, only the vibration from the dome D is taken out and a control signal is output to the vibration generating device 6. A vibration damping force for canceling only the vibration from the dome D can be applied. In addition, the natural frequency of the base gantry 5 can be changed based on the vibration from the dome D.

<Eighth Embodiment> FIG. 12 is a block diagram showing an eighth embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention.
1, the phase compensation circuit 32 and the driver 33
Of the second vibration sensor 22
The signal based on the vibration measured in is input to the band-pass filter 31 for removing vibration components other than the vibration from the dome D, and the signal passed through the band-pass filter 31 eliminates a phase shift. Is input to the driver 33 via the phase compensation circuit 32. Further, a signal based on the vibration measured by each of the second vibration sensor 22 and the third vibration sensor 17 is input to the second controller 18. The other configuration is the same as that of the second embodiment, and the description thereof will be omitted by retaining the same reference numerals.

According to the configuration of the eighth embodiment, of the vibrations measured by the second vibration sensor 22, only the vibration from the dome D is taken out and the control signal is output to the vibration generator 6,
The vibration exciter 6 can apply a vibration damping force for canceling only the vibration from the dome D. Also,
The natural frequency of the base frame 5 can be changed based on the vibration from the dome D.

Instead of the band-pass filter (BPF) 31 in each of the seventh and eighth embodiments, a low-pass filter (LPF) and a high-pass filter (HP
F) or a band elimination filter (BRF) may be used. In short, it may be appropriately selected and used according to the nature of the vibration generated from the vibration source such as the dome D.

<Ninth Embodiment> FIG. 13 is a block diagram showing a ninth embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention. The difference from the seventh embodiment is as follows. It is. That is, the controller 11 includes the one-degree-of-freedom system filter 34 and the driver 33, and the signal based on the vibration measured by the vibration sensor 10 is transmitted to the dome D
The filter is configured to be input to a one-degree-of-freedom filter 34 that removes a vibration component other than the vibration from the one-degree-of-freedom system, and that the signal passed through the one-degree-of-freedom system filter 34 is directly input to the driver 33. Further, a signal based on the vibration measured by each of the vibration sensor 10 and the third vibration sensor 17 is input to the second controller 18.

The one-degree-of-freedom system filter 34 calculates the equation of motion of the absolute coordinate system (d ² X / dt ² ) + 2hω ｛(dX / dt)-(dX
₀ / dt)｝ + ω ² (XX− ₀ ) = 0 or relative coordinate system equation of motion (d ² X / dt ² ) + 2hω (dX / dt) + ω ² X =
− (D ² X ₀ / dt ² ). Here, (d ² X ₀ / dt ² ) is an input from the vibration sensor 10, (d ² X / dt ² ) is an output to the driver 33, and h is an attenuation constant. And ω
Is a natural circular frequency, which is specified from the frequency f of the vibration generated from the vibration source, where ω = 2πf.

In the one-degree-of-freedom filter 34, the transfer function in the case of having the function of the equation of motion in the absolute coordinate system is represented by a graph of the relationship between the amplitude ratio and the frequency shown in FIG. As shown in the graph of the relationship between the phase and the frequency in FIG.
Has a 90 ° phase delay. Also, the transfer function in the case of having the function of the relative coordinate system equation of motion is shown in FIG.
As shown in the graph of FIG. 4 (c) showing the relationship between the amplitude ratio and the frequency, and the graph of FIG. 14 (d) showing the relationship between the phase and the frequency, the output with respect to the input at the natural frequency f
It has a 90 ° phase delay.

In any case of the relative coordinate system equation of motion and the absolute coordinate system equation of motion, the characteristic circular frequency ω is specified from the frequency f of the vibration generated from the vibration source, and the damping constant h is set to an appropriate value. If set, the amplification factor at frequency f is 1 /
2h, for example, when the damping constant h is set to 5%, the output frequency component is amplified ten times. The other configuration is the same as that of the seventh embodiment, and the description thereof will be omitted by retaining the same reference numerals.

According to the configuration of the ninth embodiment, as shown in the graph of the relationship between the amplitude and the frequency in FIG. 15 and the waveform diagram in FIG. Vibration sensor 10 in a state including vibration that is a noise component
[FIG. 15 (a) and FIG. 16 (a)], the one-degree-of-freedom filter 34 [FIG. 15 (b)] removes vibration noise from sources other than the vibration source. Only the target frequency component (indicated by T in FIG. 15) is extracted, and the frequency component is amplified [(c) in FIG. 15].
16 (b)], and outputs the output frequency component as a control signal to the vibrating device 6 so that only vibration from the dome D is generated by the vibrating device 6. The vibration damping force which cancels out can be given. When the base gantry 5 supported by the elastic body resonates and the vibration damping force is applied to the ground, the phase further increases.
A 90 ° delay causes a total 180 ° phase delay [Fig.
(C)] Even if the phase compensation is not performed, the dome D
A vibration damping force that cancels only vibration from the vehicle can be provided.

<Tenth Embodiment> FIG. 17 is a block diagram showing a tenth embodiment of a system for preventing vibration from propagating to a peripheral structure according to the present invention.
It is as follows. That is, the third controller 23 includes the one-degree-of-freedom filter 34 and the driver 33, and the signal based on the vibration measured by the second vibration sensor 22 removes a vibration component other than the vibration from the dome D. The signal is input to the one-degree-of-freedom system filter 34, and the signal passed through the one-degree-of-freedom system filter 34 is directly input to the driver 33. Also,
A signal based on the vibration measured by each of the second vibration sensor 22 and the third vibration sensor 17 is configured to be input to the second controller 18. The other configuration is the same as that of the eighth embodiment, and the operation is the same as that of the ninth embodiment.

According to the tenth embodiment, since the second vibration sensor 22 is provided between the dome D which is a vibration source and the peripheral structure 13, the second vibration The sensor 22 is susceptible to vibrations other than the vibrations from the dome D, but the noises can be removed by the one-degree-of-freedom filter 34, so that the vibrations from the dome D can be more easily propagated to the peripheral structure 13. This has the advantage that it can be prevented.

FIG. 18 is a circuit diagram showing a modification of the one-degree-of-freedom system filter 34. An electric circuit is formed by connecting a coil L, a resistor R, and a capacitor C in series. By setting the resonance frequency determined by the coil L and the resistor R and the capacitor C so as to correspond to the frequency of the vibration generated from the dome D, the vibration sensor 10 or the second vibration sensor 18 described above is set. With the input of the voltage E based on the vibration from the dome D, the output voltage e corresponding to the resonance frequency can be extracted from the coil L. In addition to being able to be removed, the signal voltage can be taken out in a state where the phase is naturally delayed by 90 ° by the coil L. The configuration using the analog resonance circuit or the configuration that directly solves the differential equation with the digital circuit as described above corresponds to a one-degree-of-freedom filter referred to in claims (claim 9).

In each of the above embodiments, the vibration in the vertical direction is cancelled. For example, in the vibration generator 6 of the first embodiment, the direction in which the weights 7a and 7b are directed in the same direction is changed. And the vibration damping force F applied by the vibration generator 6
May be configured to be horizontal so that horizontal vibrations generated in the structure can be prevented from propagating to the surrounding structures, and can be appropriately selected or used in accordance with the vibration to be canceled. Or just do it.

[0056]

As described above, according to the system for preventing vibration from propagating to the peripheral structure according to the first aspect of the present invention, the propagation of vibration from the structure that is the vibration source to the periphery of the ground supporting the structure is supported. Since this is prevented, unpleasant vibrations can be prevented from propagating from the structure serving as the vibration source to the surrounding structures, and the living environment of the neighboring residents can be improved.

According to the system for preventing vibration from propagating to the peripheral structure according to the second aspect of the present invention, the vibration applied to the ground from the exciter via the base is amplified by the elastic body. Even if the vibrating force is small, large control vibration can be applied to the ground, and the vibration can be effectively prevented from propagating to the surrounding structures while reducing the size of the vibrating device, which is economical. .

According to the third aspect of the present invention, the natural frequency of the elastic body is adjusted according to a change in vibration in the structure, and the vibration is propagated from the structure. Since the amplified vibration for canceling the vibration is applied to the ground via the base and the elastic body, the vibration propagating from the structure can be efficiently canceled regardless of the change in the vibration in the structure, and the vibration Vibration can be effectively prevented from propagating to the surrounding structures while the size of the device is further reduced, which is more economical.

Further, when there is vibration noise from sources other than the vibration source and control is performed in a state where vibration components from sources other than the vibration source are mixed, there is a possibility that large vibrations are locally generated. According to the system for preventing vibration from propagating to a peripheral structure according to the invention, vibration components from sources other than the vibration source are removed, and only vibration from the vibration source is canceled, so that vibration from the vibration source propagates to the peripheral structure. Can be prevented very well.

According to the system for preventing vibration from propagating to the peripheral structure according to the fifth aspect of the present invention, the vibration is generated in the structure as the vibration source at an intermediate point between the structure as the vibration source and the peripheral structure. Vibration generated by the vibration generator is canceled out by the vibration generator, and the vibration is applied to the ground through the base stand to block the propagation of vibration to the surrounding structures. Since the vibration is attenuated before propagating to the gantry, the vibration that cancels the vibration may be generated by the vibration generator, which is smaller than the vibration generated by the structure. In addition, it is possible to effectively prevent the vibration from propagating to the peripheral structure, which is economical.

According to the system for preventing vibration from propagating to the peripheral structure according to the sixth aspect of the present invention, the vibration applied to the ground from the vibrating device via the base frame is amplified by the elastic body. Large vibration can be imparted to the ground even if the vibrating force is small, and the vibration can be effectively prevented from propagating to the surrounding structures while the size of the vibrating device is further reduced. It is.

According to the system for preventing vibration propagation to a peripheral structure according to the seventh aspect of the present invention, the natural frequency of the elastic body is adjusted according to a change in vibration in the structure, and the vibration is propagated from the structure. Since the amplified vibration for canceling the vibration is applied to the ground via the base and the elastic body, the vibration propagating from the structure can be efficiently canceled regardless of the change in the vibration in the structure, and the vibration Vibration can be effectively prevented from propagating to the surrounding structures while the size of the device is further reduced, which is more economical.

When there is vibration noise from sources other than the vibration source and control is performed in a state where vibration components from sources other than the vibration source are mixed, there is a possibility that large vibrations will be generated locally. According to the system for preventing vibration from propagating to surrounding structures, vibration components from sources other than the vibration source are removed, and only vibration from the vibration source is canceled out. It can be prevented well.

According to the system for preventing propagation of vibration to the peripheral structure according to the ninth aspect of the present invention, vibration noise other than the vibration source is removed by passing through a one-degree-of-freedom filter, and only the vibration from the vibration source is removed. Therefore, a system that is energy-saving and resistant to noise could be constructed. Also,
The 90 ° phase delay caused by passing through a single-degree-of-freedom filter and the 90 °
Using the phase delay of °, without providing a phase compensation circuit,
With a simple control configuration, it is possible to favorably prevent the vibration from the vibration source from propagating to the surrounding structure, which is more economical.

[Brief description of the drawings]

FIG. 1 is an overall schematic vertical sectional view showing a first embodiment of a system for preventing vibration propagation to a peripheral structure according to the present invention.

FIG. 2 is a side view of a main part.

FIG. 3 is a schematic side view.

FIG. 4 is an overall schematic longitudinal sectional view showing a second embodiment.

FIG. 5 is a side view of a main part.

FIG. 6 is a schematic side view.

FIG. 7 is an overall schematic longitudinal sectional view showing a third embodiment.

FIG. 8 is an overall schematic longitudinal sectional view showing a fourth embodiment.

FIG. 9 is a side view of a main part showing a fifth embodiment.

FIG. 10 is a side view of a main part showing a sixth embodiment.

FIG. 11 is a block diagram showing a seventh embodiment.

FIG. 12 is a block diagram showing an eighth embodiment.

FIG. 13 is a block diagram showing a ninth embodiment.

FIGS. 14A and 14C are graphs showing a relationship between an amplitude ratio and a frequency, and FIGS. 14B and 14D are graphs showing a relationship between a phase and a frequency.

FIG. 15 is a graph showing the relationship between amplitude and frequency.

FIG. 16 is a waveform diagram.

FIG. 17 is a block diagram showing a tenth embodiment.

FIG. 18 is a circuit diagram showing a modification of the one-degree-of-freedom system filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Ground 3 ... Foundation 4 ... 1st air spring as an elastic body 5 ... Foundation gantry 6 ... Exciting device 10 ... Vibration sensor 11 ... Controller as control means 13 ... Peripheral structure 17 ... Third vibration sensor 20 ... A second air spring as an elastic body 21 ... Base frame 22 ... Second vibration sensor 23 ... Third controller 31 as a control means 31 ... Band pass filter 34 ... One degree of freedom filter D ... Dome as a structure

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshinori Takahashi 2-5-1 Minamisuna, Koto-ku, Tokyo Inside Takenaka Corporation Technical Research Institute (72) Inventor Waki Katayama 2-5-Minamisuna, Koto-ku, Tokyo No. 14 Takenaka Corporation Technical Research Institute (72) Inventor Hirokazu Yoshioka 2-14-14 Minamisuna, Koto-ku, Tokyo Inside Technical Research Institute Takenaka Corporation (72) Inventor Masashi Yasuda Minami Hatsushima-cho, Amagasaki City, Hyogo Prefecture Reference No. 10 10 133 Patent Equipment Co., Ltd. (56) References JP-A-63-114727 (JP, A) JP-A-4-312607 (JP, A) JP-A-3-66950 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) E02D 31/08 E04H 9/02 341 F16F 15/02 G05D 19/02

Claims (9)

(57) [Claims] An exciter is provided at a location close to a foundation of a structure serving as a vibration source via a foundation mount, and a vibration sensor for measuring ground vibration around the foundation is provided.
A system for preventing vibration propagation to a peripheral structure, comprising: a control unit that outputs a control signal to the vibrating device based on the vibration measured by the vibration sensor so as to generate a vibration that cancels the vibration. . 2. A system for preventing vibration from propagating to a peripheral structure that supports the base gantry according to claim 1 with respect to a supporting ground via an elastic body. 3. The elastic body according to claim 2, wherein a natural frequency of the elastic body is changeable and controllable, and a third vibration sensor for measuring vibration of the base gantry is provided.
Based on the vibration measured by the vibration sensor, a vibration generating force amplification control mechanism is provided that changes the natural frequency of the base gantry supported by the elastic body to resonate and follows a change in the frequency of ground vibration. Vibration propagation prevention system for existing surrounding structures. 4. A vibration sensor according to claim 1, further comprising a filter for removing a vibration component from sources other than the vibration source, and transmitting a control signal to the control means based on the vibration passing through the filter. Vibration propagation prevention system to output peripheral structures. 5. An exciter is provided at an intermediate point between a structure serving as a vibration source and a peripheral structure via a base stand, and vibration transmitted from the structure to the peripheral structure is measured around the base stand. And a control means for outputting a control signal to the vibrating device based on the vibration measured by the second vibration sensor so as to generate a vibration that cancels the vibration based on the vibration measured by the second vibration sensor. A system for preventing vibration from propagating to peripheral structures. 6. A system for preventing vibration from propagating to a peripheral structure in which the base gantry according to claim 5 is supported on a supporting ground via an elastic body. 7. The elastic body according to claim 6, wherein the natural frequency of the elastic body can be changed and controlled, and a third vibration sensor for measuring the vibration of the base gantry is provided. Based on the vibration measured in the above, the natural frequency of the base gantry supported by the elastic body is changed to resonate, and a vibrating force amplification control mechanism for following a change in the frequency of the ground vibration is provided. Vibration propagation prevention system for structures. 8. The second vibration sensor according to claim 5, further comprising: a filter for removing a vibration component from sources other than the vibration source, wherein the control means is provided based on the vibration passing through the filter. Vibration propagation prevention system for peripheral structures that output control signals. 9. A system according to claim 4, wherein the filter is a one-degree-of-freedom system filter.