JP4043465B2 - Structure vibration generator - Google Patents

Description

  In the present invention, for example, when performing a vibration test on a large-scale structure such as various equipment of nuclear facilities, bridges, buildings, boilers, and turbine mounts, an external force is applied to the structure and the initial displacement is performed. The present invention relates to a structure vibration generator that generates vibration in the structure by instantly releasing the structure from the external force.

  FIG. 5 is a side view for explaining a conventional structural vibration generator. In the figure, for example, an external force is applied to a large structure 1 such as various equipment, bridges, buildings, boilers, turbine mounts, etc. of a nuclear facility to cause an initial displacement d, and the structure 1 is instantly released from the external force. Thus, when a vibration test is performed on the structure 1 by generating vibration in the structure 1, the vibrometer 5 is first attached to the main part of the structure 1. The other end of the wire 1 on the structure 1 side, which is connected to the structure 1 at one end, is wound up by, for example, a winder 3 such as a chain block, and the other end is connected to the fixed support portion 4 on the fixed support portion 4 side. The other end of 2 is also wound by the winder 3, and the structure 1 is pulled by slowly strengthening the wind of the winder 3, causing the structure 1 to be displaced d.

When the displacement d of the structure 1 reaches the set displacement, when the “x” mark portion of the wire 2 is instantaneously cut using a cutter or the like, the structure 1 causes free-damping vibration with the set displacement d as the initial displacement. Therefore, the vibration of the structure 1 at that time can be measured by the vibrometer 5, and the vibration characteristics of the structure 1 can be analyzed based on the measurement result of the vibrometer 5.
Japanese Utility Model Publication No. 57-164441

  However, in the conventional vibration test as described above for the structure 1, the vibration test per wire is limited to one time, and the test test for setting the measurement range of the vibrometer 5 and the displacement amount of the structure 1 are set. When performing various types of vibration tests such as a series of vibration tests performed for various displacement amounts by sequentially changing, it is necessary to prepare a new wire 2 for each vibration test. In addition, since the object of the vibration test is the large structure 1, it takes a lot of time to replace the old used wire with the new wire 2, or the wire 2 in a tensioned state. When the wire is cut instantaneously, the wire is bounced off, and there is a disadvantage that it is necessary to prevent danger in the work.

Therefore, the present invention makes it possible to pull a structure by applying a large tension or load to a wire body or the like in comparison with the attraction force of the electromagnetic attraction force generating means. Enables remote control of the operation of the vibration device so that the vibration test can be carried out safely and reliably, and any tension or It is possible to divide the wire and other ridges with a load, and to repeatedly use the same ridge and the like in multiple vibration tests to conduct the vibration test. When exchanging strips, it is possible to easily perform the replacement work without requiring much time, and to increase the vibration test efficiency. It is intended to provide a location.

In order to solve the above-described problems, the structural vibration generator of the present invention generates vibrations in the structure by applying an external force to the structure to cause initial displacement and instantaneously releasing the structure from the external force. The vibration generating device includes: an electromagnetic attraction force generating unit that generates an electromagnetic attraction force; an electromagnetic attracting unit that is attracted to the electromagnetic attraction force generation unit; Load detecting means for detecting a load for separating the electromagnetic attracted means from the electromagnetic attracting force generating means against the attracting force of the electromagnetic attracted means by the attracting force generating means, One of the attraction force generating means and the electromagnetic attracting means is connected to the other end side of the structure-side cable body, one end side of which is connected to the structure, and the electromagnetic attraction force generating means and The other of the electromagnetic attracting means is controlled by the winding means. In structure excitation device side is connected to the other end of the rope of the winding means side to be wound, the electromagnetic the adsorption means, proximal to the electromagnetic attraction force generating means integral with the base body part is pivotally supported tip is characterized by being composed by pivoting arm that is attracted to the electromagnetic attraction force generating means.

According to the structural vibration device of the present invention, the following effects can be obtained.
(1) An exciter that generates vibration in the structure by applying an external force to the structure to cause initial displacement and instantaneously releasing the structure from the external force. The electromagnetic attracting force generating means for generating an attractive attracting force, the electromagnetic attracting means attracted by the electromagnetic attracting force generating means, and the attracting force of the electromagnetic attracting means by the electromagnetic attracting force generating means And a load detecting means for detecting a load for separating the electromagnetic attracted means from the electromagnetic attracting force generating means, wherein the electromagnetic attracting force generating means and the electromagnetic attracted means are One is connected to the other end of the structure-side cable body, one end of which is connected to the structure, and the other of the electromagnetic attracting force generating means and the electromagnetic attracting means is a winding means. To the other end of the cable body on the winding means side where one end is wound by Because it is connected, it is possible to remotely control the operation of the structure vibration generator by operating the switch, so that the vibration test can be carried out safely and reliably, and the load on the cable body can be freely and selectively adjusted. It is possible to sever a wire or other striated body with an arbitrary tension or load, and the same striated body such as a wire can be repeatedly used in a plurality of vibration tests to conduct a vibration test. when replacing the can to the easily replacement without time-consuming, Ru can improve the test efficiency of vibration testing.
(2) The electromagnetic attracting means is constituted by a rotating arm whose base end is pivotally supported on a base body integral with the electromagnetic attracting force generating means and whose distal end is attracted to the electromagnetic attracting force generating means. since it has, compared to the attraction force of the electromagnetic attraction force generating means, Ru can be drawn structures by exerting a large tensile force or load rope member such as a wire.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a reference example based on the basic principle of the present invention will be described with reference to FIGS. FIG. 1 (1) is an enlarged front view of a main part of a structural vibration generator according to a basic reference example of the present invention, and FIG. 1 (2) is a structural vibration generator of a modification of FIG. 1 (1). FIG. 2 is a side view for explaining a usage mode of the structural vibration generator of FIGS. 1 (1) and 1 (2).

  First, in FIGS. 1A and 1B, an external force is applied to the large structure 1 to generate an initial displacement d, and the structure 1 is instantaneously released from the external force to generate vibration in the structure 1. The apparatus includes an iron core 7 and a coil 8 that is connected to a DC power source 10 and that is energized by a switch 11, and generates an electromagnetic attractive force generating means 28, and the electromagnetic attractive force generating means. And an electromagnetically attracted means 29 made of a magnetic body 9 attracted by the magnetic material 28.

  The electromagnetic attracting means 29 is separated from the electromagnetic attracting force generating means 28 against the attracting force of the electromagnetic attracting means 29 such as the magnetic body 9 by the electromagnetic attracting force generating means 28 having the iron core 7 and the coil 8. A load converter 12 as load detecting means for detecting the magnitude of the load to be loaded is mounted on the magnetic body 9 as the electromagnetic attracting means 29. One of the electromagnetic attraction force generating means 28 and the electromagnetic attracting means 29 having the iron core 7 and the coil 8, for example, the electromagnetic attracting means 29 is connected to the structure 1 at one end side. The other of the electromagnetic attracting force generating means 28 and the electromagnetic attracting means 29, for example, the electromagnetic attracting force generating means 28 is connected or locked to the other end side of the strip 2 and, for example, a chain as a winding means It is connected or locked to the other end side of the cable body 2 on the winding means side where one end side is wound by a winder 3 such as a block.

  The load detected by the load converter 12 as the load detecting means is taken out in the form of a measurement data signal indicating the magnitude of the load, amplified by the amplifier 13, and then read as the magnitude of the load by the load meter 14. , While being recorded, displayed.

  When the switch 11 is turned on, a current flows through the coil 8, an electromagnetic attractive force is generated in the electromagnetic attractive force generating means 28, and the iron core 7 of the electromagnetic attractive force generating means 28 is used as the electromagnetic attracting means 29. The magnetic body 9 is adsorbed. When the switch 11 is turned off, the electromagnetic attracting force of the electromagnetic attracting force generating means 28 disappears, and the magnetic body 9 as the electromagnetic attracting means 29 is attracted by the electromagnetic attracting force generating means 28. It is released from the force and can be separated from the iron core 7 freely.

  When the vibration test is performed on the structure 1, the vibrometer 5 is first attached to the main part of the structure 1. The other end side of the cable body 2 such as a wire on the structure 1 side, one end of which is connected or locked to the structure 1, is connected to the electromagnetic attracting force generating means 28 and the electromagnetic cover. For example, the magnetic member 9 of the electromagnetic attracting means 29 is connected or locked to one of the attracting means 29. The other of the electromagnetic attractive force generating means 28 and the electromagnetic attracted means 29 constituting the electromagnetic wire cutting device 6, for example, the iron core 7 of the electromagnetic attractive force generating means 28 is provided with a chain block or the like as a winding means. The other end side of the cable body 2 such as a wire on the winding means side where one end side is wound by the winder 3 is connected or locked.

  On the other hand, the other end side of the cable body 2 such as a wire on the fixed support portion 4 side, one end of which is connected or locked to the fixed support portion 4, is also wound by a winder 3 as a winding means. Yes. By slowly strengthening the winding of the winder 3, the winder 3 tensions the structure 1 via the electromagnetic wire-cutting device 6 with the switch 11 turned on and the cable body 2 such as a wire. Pulling with W causes displacement d to the structure 1.

As described above, the load detected by the load converter 12 attached to the magnetic body 9 of the electromagnetic wire cutting device 6 is taken out in the form of a measurement data signal indicating the magnitude of the load, and amplified by the amplifier 13. The load meter 14 reads and records the magnitude of the load while displaying it.

After confirming by the load meter 14 that is carried out the winding operation by the winding device 3 tension W of rope member 2 such as wire over becomes set tension, when the switch 11 in the OFF state, electromagnetic the The magnetic body 9 as the attracting means 29 is released from the electromagnetic attracting force of the electromagnetic attracting force generating means 28, and the cable body 2 such as a wire is divided by the electromagnetic wire cutting device 6, so that the structure 1 is free. Since the damped vibration occurs, the vibration of the structure 1 at that time can be measured by the vibrometer 5 and the vibration characteristics of the structure 1 can be analyzed based on the measurement result of the vibrometer 5.

In FIG. 1 (2), the wire body 2 such as a wire on the magnetic body 9 side connected or locked to the magnetic body 9 side as the electromagnetic attracting means 29, and the iron core 7 of the electromagnetic attractive force generating means 28. between the rope member 2 such as a coupling or locked iron core 7 side to the side wires, pre-connected to each other by recoil stop rope body 2a of the wire or the like to have a certain degree of latitude in length As described above, the magnetic body 9 as the electromagnetic attracting means 29 is released from the electromagnetic attracting force of the electromagnetic attracting force generating means 28 as described above, and the cable body 2 such as a wire is replaced with the electromagnetic wire cutting device 6. when it is divided in, it can be a recoil ne stop the shed end portion of the rope body 2 of the wire or the like of the rope 2 and the core 7 side of the wire or the like of the magnetic body 9 side.

1 (1), 1 (2) and 2 in the structural vibration device, it is not necessary to replace the wire 2 or the like for every vibration test, and it can be used over and over again. Can do. Moreover, the replacement time of the cable body 2 such as a wire can be reduced, and the efficiency of the vibration test can be improved. Furthermore, it becomes possible to operate remotely by switch operation, and it is safe and can cut | disconnect the cable bodies 2, such as a wire, by arbitrary tension or load.

Next, examples of the present invention will be described. Figure 3 is a side view illustrating a usage manner of a main part enlarged front view of the structure vibration generating device according to the preferred embodiment, FIG. 4 is a structure vibration generating device of FIG. 3 of the present invention.

3 and 4, the vibration generating device that generates the vibration in the structure 1 by applying an external force to the structure 1 to cause initial displacement and instantaneously releasing the structure 1 from the external force is the trigger device 16. The trigger device 16 includes an electromagnetic attraction force generating means 28a having an iron core 7 erected on a base body 7a and a coil 8 energized through a switch 11 from a DC power source 10, and a base end on the base body 7a. The magnetic member at the tip is pivotally supported by an electromagnetically attracted means 29a constituted by an arcuate rotating arm 15 that is attracted to the iron core 7 of the electromagnetic attractive force generating means 28a .

  The arcuate rotating arm 15 as the electromagnetic attracting means 29a is moved around the pivot portion 15a at the base end against the attracting force against the magnetic body 9 by the electromagnetic attracting force generating means 28a having the iron core 7 and the coil 8. The load converter 12 as load detecting means for detecting the magnitude of the load to be moved away from the electromagnetic attraction force generating means 28a is mounted on a protrusion 29b protruding from the back of the rotating arm 15. Has been. One of the electromagnetic attraction force generating means 28a having the iron core 7 and the coil 8 and the electromagnetic attracted means 29a, for example, the protrusion 29b of the rotating arm 15 constituting the electromagnetic attracted means 29a is the structure 1 The other end side of the cable body 2 on the structure 1 side to which one end side is connected to the other end of the electromagnetic attraction force generating means 28a and the electromagnetic attracting means 29a, for example, electromagnetic attraction The base body 7a of the force generating means 28 is connected or locked to the other end side of the cable body 2 on the winding means side where one end side is wound by a winder 3 such as a chain block as the winding means. .

  The load detected by the load converter 12 as the load detecting means is taken out in the form of a measurement data signal indicating the magnitude of the load, amplified by the amplifier 13, and then read as the magnitude of the load by the load meter 14. , While being recorded, displayed.

  When the switch 11 is turned on, a current flows through the coil 8, an electromagnetic attractive force is generated in the electromagnetic attractive force generating means 28a, and the iron core 7 of the electromagnetic attractive force generating means 28a is used as the electromagnetic attracting means 29a. The magnetic body 9 at the tip of the rotating arm 15 is adsorbed. When the switch 11 is turned off, the electromagnetic attractive force of the electromagnetic attractive force generating means 28a disappears, and the magnetic body 9 at the tip of the rotating arm 15 as the electromagnetic attracting means 29a is electromagnetically attracted. It is released from the electromagnetic attraction force of the force generating means 28a, is freely separated from the iron core 7, and the pivot arm 15 pivots outward about the pivot portion 15a at its base end.

  When the vibration test is performed on the structure 1, the vibrometer 5 is first attached to the main part of the structure 1. The other end side of the cable body 2 such as a wire on the structure 1 side, one end of which is connected or locked to the structure 1, is an electromagnetic attracting force generating means 28a and an electromagnetic attracting means 29a of the trigger device 16. On the other hand, for example, it is connected or locked to the protrusion 29b on the back of the rotating arm 15 of the electromagnetic attracting means 29a. The other of the electromagnetic attracting force generating means 28a and the electromagnetic attracting means 29a of the trigger device 16, for example, the iron core 7 of the electromagnetic attracting force generating means 28a has a winder 3 such as a chain block as a winding means. The other end side of the cable body 2 such as a wire on the winding means side on which one end side is wound is connected or locked.

  On the other hand, the other end side of the cable body 2 such as a wire on the fixed support portion 4 side, one end of which is connected or locked to the fixed support portion 4, is also wound by a winder 3 as a winding means. Yes. By slowly strengthening the winding of the winder 3, the winder 3 pulls the structure 1 with a tension W through the trigger device 16 and the cable body 2 such as a wire with the switch 11 turned on. The displacement d is caused in the structure 1.

  As described above, the load detected by the load transducer 12 mounted on the protrusion 29b in the rear part of the rotating arm 15 of the trigger device 16 is taken out in the form of a measurement data signal indicating the magnitude of the load, and is amplified. 13 is amplified and read by the load cell 14 as the magnitude of the load, recorded and displayed.

After confirming by the load meter 14 that is carried out the winding operation by the winding device 3 tension W of rope member 2 such as wire over becomes set tension, when the switch 11 in the OFF state, electromagnetic the The magnetic body 9 at the tip of the rotating arm 15 as the adsorbing means 29a is released from the electromagnetic attracting force of the electromagnetic attracting force generating means 28a, and the cable body 2 such as a wire is attached to the rotating arm 15 of the trigger device 16. As a result, the structure 1 causes free-damping vibration, so that the vibration of the structure 1 at that time is measured by the vibration meter 5, and the vibration characteristics of the structure 1 are determined based on the measurement result of the vibration meter 5. Can be analyzed.

  In the structure vibration exciter shown in FIG. 3 and FIG. 4, it is not necessary to replace the cable body 2 such as a wire for each vibration test, and it can be used repeatedly any number of times. Moreover, the replacement time of the cable body 2 such as a wire can be reduced, and the efficiency of the vibration test can be improved. Further, the trigger device 16 has a rotational moment from the pivot portion 15a of the pivot arm 15 to the protrusion 29b that connects or locks the cable-like body 2 such as a wire, and from the pivot portion 15a to the magnetic body 9 of the pivot arm 15. Since the electromagnetic attraction force of the electromagnetic attraction force generating means 28a can be reduced by the difference in the magnitude of the moment between the rotation moment and the rotation moment, the vibration test is performed by pulling the structure 1 with a large tension or load W. When performed, the structure vibration exciter shown in FIGS. 3 and 4 can be used effectively.

(1) The figure is an enlarged front view of the main part of the structural vibration device according to the basic reference example of the present invention, and (2) the drawing of the structural vibration device showing a modification of FIG. It is a principal part enlarged front view. It is a side view for demonstrating the usage condition of the structure vibration generator of FIG. 1 (1) and FIG. 1 (2). It is a principal part enlarged front view of the structure exciter concerning the best example of the present invention. It is a side view for demonstrating the usage condition of the structure vibration generator of FIG. It is a side view for demonstrating the conventional structure vibration generator.

Explanation of symbols

1 Large structure 2 Wire as a striated body
Winder 4 fixed support 5 vibrometer 6 electromagnetic wire cutting device 7 core 7a substrate 8 coil 9 the magnetic member 10 the DC power source 11 switch 12 load converter 13 amplifier 14 load meters as 2a Jump I stop wire 3 take-up means DESCRIPTION OF SYMBOLS 15 Rotating arm 15a Pivoting part 16 Trigger device 28, 28a Electromagnetic attracting force generation means 29, 29a Electromagnetic attracting means 29b Protrusion part W Tension d Displacement

Claims (1)

An exciter that generates vibration in the structure by applying an external force to the structure to cause initial displacement and instantaneously releasing the structure from the external force. Against the attracting force of the electromagnetic attracting means by the electromagnetic attracting force generating means, the electromagnetic attracting means attracted by the electromagnetic attracting force generating means, Load detecting means for detecting a load for separating the electromagnetic attracted means from the electromagnetic attracting force generating means, and one of the electromagnetic attracting force generating means and the electromagnetic attracted means is The other end of the electromagnetic attraction force generating means and the electromagnetic attracting means is connected to the other end side of the structure-side cable by which one end side is connected to the structure. It is connected to the other end of the cable body on the winding means side to be wound. In structure exciter device is, the electromagnetic the adsorption means is the tip is pivoted base end portion to the electromagnetic attraction force generating means integral with the substrate is attracted to the electromagnetic attraction force generating means A structure exciter characterized by comprising a rotating arm .

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