JP7332439B2 - Disconnecting switch seismic evaluation device and computer-readable recording medium - Google Patents

Description

The present invention relates to a seismic evaluation device for a disconnecting switch and a computer-readable recording medium.

A thrust portion provided in the disconnecting switch is generally fixed to the bottom portion of the insulator portion with a plurality of bolts. The thrust section has a thrust shaft and a bearing that smoothly rotates the thrust shaft, and rotates the insulator section as the thrust shaft rotates.

When such a thrust portion is subjected to vibration due to an earthquake or the like, stress is generated in the thrust portion, and the thrust portion may be damaged. In addition, stress is also generated in the insulator portion, and the insulator portion may be damaged.

Therefore, the strength of the thrust part and the insulator part was calculated on the desk using the seismic evaluation device of the disconnecting switch. As shown in the flowchart of FIG. 10, first, an acceleration response magnification of 7 times is uniformly input from the input unit (step S51). In JEAG5003, the acceleration response magnification is set to 1 when three waves of resonance sine of acceleration 0.3 G (3 m/S ² ) are input to the thrust section and insulator section.

Next, three waves of resonance sine of 3m/ ^S2 are inputted by the modified seismic coefficient method by one mass point, and the bending moment of the evaluation site is calculated at the acceleration response magnification of 7 times (step S52). The parts to be evaluated are the thrust part and the insulator part.

Next, either the thrust portion or the insulator portion is selected (step S53). When the thrust portion is selected, the dangerous cross section of the thrust portion is uniformly calculated as the shortest linear distance (step S54). The strength of the thrust portion is evaluated by calculating the generated stress of the thrust portion based on the calculated dangerous cross-section of the thrust portion (step S55).

On the other hand, when the insulator portion is selected, the dangerous cross section of the insulator portion is calculated at the insulator base (step S56). Based on the calculated critical section of the insulator base, the stress generated in the insulator base is calculated to evaluate the strength of the insulator base (step S57).

Japanese Patent Application Laid-Open No. 2019-91601

However, in the conventional calculation of the strength of the thrust part and the insulator part, the strength of the thrust part is calculated using a uniform acceleration response factor regardless of the type of disconnecting switch such as a horizontal central single-point disconnecting switch or a horizontal two-point disconnecting switch. was calculating

In addition, regardless of the material and shape of the thrust portion, the same critical cross section is set to calculate the stress generated in the thrust portion.

For this reason, the dangerous cross-sections of the thrust part and the insulator part calculated on paper were quite different from the actual failure points of the thrust part and the insulator part. The stress distribution of the thrust part and the insulator part was also considerably different from the stress distribution of the actual damaged parts of the thrust part and the insulator part.

An object of the present invention is to provide a seismic evaluation device for a disconnecting switch and a computer-readable recording medium that can calculate the generated stress of the thrust part and the insulator part by calculation suitable for the actual disconnecting switch, the thrust part, and the insulator part. provide.

In order to solve the above problems, the invention according to claim 1 is a disconnecting switch seismic resistance evaluation apparatus for calculating the seismic resistance strength of a thrust part of the disconnecting switch, wherein the type of the disconnecting switch and the acceleration response different for each type and the acceleration response magnification corresponding to the input type of disconnecting switch is read from the memory, and the bending moment of the thrust portion is calculated based on the read acceleration response magnification. a bending moment calculation unit for calculating the bending moment of the critical section of the thrust section based on the calculated bending moment of the thrust section; a section modulus calculator for calculating a stress distribution coefficient representing the stress distribution of the risky cross section based on the material and shape, and calculating the section modulus of the risky cross section based on the stress distribution coefficient; and a generated stress calculator for calculating the stress generated in the dangerous cross section based on the section modulus and the bending moment of the dangerous cross section.

The invention according to claim 2 is characterized by comprising a safety factor calculation unit that calculates the safety factor of the thrust part based on the generated stress and the allowable stress.

The invention according to claim 3 is characterized in that the section modulus calculator calculates the section modulus based on the diameter of the dangerous section when the stress is distributed in a cylindrical shape all around the thrust section.

In the invention according to claim 4, the section modulus calculation unit calculates the width of the dangerous section based on the diameter of the thrust portion and the stress distribution angle when the stress is distributed in the thrust cylinder of the thrust portion. and calculating the section modulus based on the width of the critical section and the thickness of the thrust portion.

The invention according to claim 5 is a disconnecting switch seismic resistance evaluation apparatus for calculating the seismic resistance strength of an insulator portion of a disconnecting switch, wherein the type of the disconnecting switch and an acceleration response factor different for each type are associated and stored. The memory and the acceleration response magnification corresponding to the type of the input disconnecting switch are read from the memory, the bending moment of the insulator base of the insulator portion is calculated based on the read acceleration response magnification, and the bending moment of the insulator base is calculated. a bending moment calculation unit that calculates the bending moment of the dangerous section of the insulator base based on the bending moment; and the bending moment of the dangerous section of the insulator base calculated by the bending moment calculation unit and the guaranteed breaking moment of the insulator. and a safety factor calculation unit that calculates the safety factor of the insulator part based on the above.

The present invention also includes a computer-readable recording medium storing a computer program for calculating the seismic strength of the thrust portion of the disconnecting switch. The present invention also includes a computer-readable recording medium storing a computer program for calculating the seismic strength of the insulator of the disconnecting switch.

According to the first aspect of the invention, the section modulus is calculated based on the acceleration response magnification corresponding to the type of disconnecting switch and the material and shape of the thrust portion, and the calculated section modulus and the bending moment of the dangerous section are combined. Based on this, the stress generated in the dangerous cross section is calculated. Therefore, the generated stress of the thrust section can be calculated by calculation suitable for the actual disconnecting switch and thrust section.

According to the second aspect of the invention, the safety factor of the thrust portion can be calculated based on the generated stress and the allowable stress.

According to the third aspect of the present invention, when stress is distributed in a cylindrical shape all around the thrust portion, the critical section modulus can be calculated based on the diameter of the critical section.

According to the fourth aspect of the invention, when stress is distributed in the thrust cylindrical shape of the thrust portion, the width of the dangerous cross section is calculated based on the diameter of the thrust portion and the stress distribution angle, and the width of the dangerous cross section and the thrust portion are calculated. The section modulus can be calculated based on the thickness of

According to the fifth aspect of the invention, the bending moment of the insulator base is calculated based on the acceleration response magnification corresponding to the type of disconnecting switch, and the bending moment of the dangerous section of the insulator base is calculated based on the bending moment of the insulator base. Therefore, it is possible to calculate the safety factor of the insulator part by calculation suitable for the actual disconnecting switch and the insulator part.

The inventions according to claims 6 to 10 are computer-readable recording medium inventions corresponding to the inventions of the disconnecting switch seismic resistance evaluation device according to claims 1 to 5.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the seismic evaluation apparatus of the disconnecting switch which concerns on embodiment of this invention. FIG. 4 is a diagram showing acceleration response magnifications according to the type of disconnecting switch and the rated voltage of the seismic evaluation apparatus for disconnecting switches according to the embodiment of the present invention; Fig. 2 shows a horizontal central single point disconnector according to an embodiment of the present invention; 1 shows a horizontal two-point disconnect switch according to an embodiment of the present invention; FIG. FIG. 4 is a diagram showing the stress distribution and diameter of the critical section of the thrust part of the welding reinforcement type of the disconnecting switch according to the embodiment of the present invention; FIG. 4 is a cross-sectional view of a weld reinforcement type thrust portion of the disconnecting switch according to the embodiment of the present invention; FIG. 4 is a view showing stress distribution and stress distribution angle of a critical section of a direct support type thrust portion of the disconnecting switch according to the embodiment of the present invention; FIG. 4 is a cross-sectional view of a direct support type thrust portion of the disconnecting switch according to the embodiment of the present invention; It is a flowchart which shows the process of the thrust part of the seismic evaluation apparatus of the disconnecting switch which concerns on embodiment of this invention, and an insulator part. It is a flowchart which shows the process of the thrust part of the seismic evaluation apparatus of the conventional disconnecting switch, and an insulator part.

BEST MODE FOR CARRYING OUT THE INVENTION A seismic evaluation apparatus for a disconnecting switch and a computer-readable recording medium according to embodiments of the present invention will be described in detail below with reference to the drawings.

(embodiment)
FIG. 1 is a diagram showing a seismic evaluation apparatus for a disconnecting switch according to an embodiment of the present invention. The disconnecting switch seismic resistance evaluation apparatus shown in FIG. 1 calculates the seismic resistance strength of the thrust portion and the insulator portion of the disconnecting switch. The disconnecting switch seismic evaluation apparatus includes an input unit 11 , an acceleration response magnification memory 12 , a CPU (Central Processing Unit) 14 having a program memory 15 , and an output unit 16 .

The input unit 11 is a keyboard, mouse, etc., and inputs information on the type of disconnecting switch, information on the material, shape, structure, etc. of the thrust part, and information on the mass, radius, thickness, etc. of the thrust part and the insulator part.

The acceleration response magnification memory 12 associates the types of disconnecting switches with different acceleration response magnifications for each type and stores them in a table as shown in FIG. The table stores the types of disconnecting switches, rated voltages, and acceleration response magnifications in association with each other.

For example, when the disconnecting switch is a horizontal central single-point disconnecting switch as shown in FIG. (for example, 6.4 times), the rated voltage is 300 kV, and the acceleration response magnification is f3 (for example, 5.9 times).

When the disconnecting switch is a horizontal two-point disconnecting switch as shown in FIG. 4, the rated voltage is 72 kV and the acceleration response magnification is f4 (eg 6.3 times), the rated voltage is 168 kV and the acceleration response magnification is f5 (eg 5.8 times).

In the horizontal central single-point disconnector as shown in FIG. 3, one base 22a out of three bases 22a is provided with an operating device 21, and thrust portions 24a and 24b are provided at both ends of the base 22a to rotate insulators 23a. , 23b are erected.

By operating the operation device 21, the rotary insulators 23a and 23b are rotated, and the conductive portion 25a provided at the tip of the rotary insulator 23a and the conductive portion 25b provided at the tip of the rotary insulator 23b are connected to conduct. .

In the horizontal two-point disconnector as shown in FIG. 4, three bases 22b are connected by a base 22c, and fixed insulators 23d1, 23d2, 23e1, 23e2 consisting of two stages are erected at both ends of the base 22b. . Two stages of rotating insulators 23c1 and 23c2 are erected at the substantially central portion of the base 22b via a thrust portion 24c. A conductive portion 25c is provided at the tip of the rotary insulator 23c2. As the rotary insulators 23c1 and 23c2 rotate, the conductive portions 25c provided at the tips of the rotary insulators 23c1 and 23c2 are connected to the tip of the fixed insulator 23d2 and the tip of the fixed insulator 23e2 to conduct.

As described above, the horizontal central single-point disconnecting device as shown in FIG. Since the disconnector is composed of one thrust portion 24c and one rotary insulators 23c1 and 23c2, the acceleration response magnifications are different. The reasons for the different acceleration response factors are the difference in the shape and weight of the conductive part mounted on the upper part of the insulator, and the difference in the number of insulator stages and insulator thickness depending on the rating.

The CPU 14 reads from the acceleration response magnification memory 12 the acceleration response magnification corresponding to the information on the type of disconnecting switch input from the input unit 11 . The CPU 14 can be read by a computer storing a program for calculating the generated stress and the safety factor of the thrust section 24 (hereinafter, the thrust sections 24a and 24b shown in FIG. 3 and the thrust section 24c shown in FIG. 4 are represented by 24). It has a program memory 15 consisting of a recording medium. The CPU 14 executes the program stored in the program memory 15 to calculate the generated stress and the safety factor of the thrust section 24 .

The CPU 14 includes a bending moment calculator 17 , a section modulus calculator 18 , a stress calculator 19 , and a safety factor calculator 20 as means for executing programs stored in the program memory 15 .

The bending moment calculator 17 calculates the bending moment of the thrust portion 24 or the insulator base based on the acceleration response magnification read from the acceleration response magnification memory 12, and based on the calculated bending moment of the thrust portion 24 or the insulator base. Calculate the bending moment of the dangerous section of the thrust part 24 or insulator base.

The section modulus calculator 18 calculates a stress distribution coefficient representing the stress distribution of the dangerous section based on the bending moment of the dangerous section of the thrust section 24 calculated by the bending moment calculator 17 and the material and shape of the thrust section 24, Calculate the section modulus based on the stress distribution factor.

The section modulus calculator 18 calculates the critical section modulus based on the diameter of the critical section when the stress is distributed in the cylindrical shape all around the thrust section 24 . The section modulus calculation unit 18 calculates the width of the dangerous section based on the diameter of the thrust section 24 and the stress distribution angle when the stress is distributed in the thrust cylindrical shape of the thrust section 24, and calculates the width of the dangerous section and the thrust section 24. Calculate the section modulus based on the thickness of

The generated stress calculator 19 calculates the stress generated in the dangerous cross section based on the section modulus calculated by the section modulus calculator 18 and the bending moment of the dangerous cross section.

The safety factor calculation unit 20 calculates the safety factor of the thrust part 24 based on the stress generated in the dangerous cross section calculated by the generated stress calculation unit 19 and the allowable stress. The safety factor calculator 20 calculates the safety factor of the insulator based on the bending moment of the dangerous section of the insulator base calculated by the bending moment calculator 17 and the guaranteed breaking moment of the insulator.

The output unit 16 is a display device, a printer, or the like, and outputs the generated stress calculated by the generated stress calculation unit 19 and the safety factor of the thrust unit 24 or insulator calculated by the safety factor calculation unit 20 .

Next, the fact that the stress distribution and generated stress in the dangerous section of the thrust portion 24 differ depending on the material, structure, and shape of the thrust portion 24 will be described.

First, FIG. 5 shows the stress distribution and diameter of the critical cross section of the weld reinforcement type thrust portion 24 . FIG. 6 shows a sectional view of a weld reinforcement type thrust portion. As shown in FIG. 6, a thrust portion 24 having a thrust shaft 24A1 and bearings 24A2 is connected to an insulator portion 23A having an insulator base portion 23A1 by a plurality of bolts 26A.

As shown in FIG. 5(a), the material of the thrust portion 24 is steel, and portions A and B on the lower side of the thrust are fixed by welding. As shown in FIG. 5(a), the A portion has high rigidity, and the B portion is the weakest point. Therefore, as shown in FIG. 5(b), the stress is distributed in a cylindrical shape all around. The section modulus calculation unit 18 calculates the critical section modulus based on the diameters do and di of the critical sections when the stress is distributed cylindrically around the entire circumference of the thrust section 24, as shown in FIG. 5(c).

Next, FIG. 7 shows the stress distribution and the stress distribution angle of the critical section of the direct support type thrust portion. FIG. 8 shows a sectional view of a direct support type thrust portion. As shown in FIGS. 7 and 8, a thrust portion 24 having a thrust shaft 24B1 and bearings 24B2 is fixed to a rectangular support plate 27 by four bolts 26B and connected to an insulator portion 23B having an insulator base portion 23B1. .

As shown in FIG. 7(a), the material of the thrust part 24 is casting, and when the supporting plate 27 is rectangular, stress is distributed along the thrust cylinder as shown in FIG. 7(b). do. The stress distribution angle of the critical section of the thrust portion 24 is approximately 90 degrees.

Also, although not shown, when the material of the thrust part 24 is steel, the structure of the thrust part 24 is bolted to the insulator part, and the thrust lower side is free, the stress is distributed from end to end.

Next, the operation of the seismic evaluation apparatus for disconnecting switches according to the embodiment configured as described above will be described in detail with reference to the flowchart shown in FIG.

First, the input unit 11 inputs information such as the type and rated voltage of the disconnecting switch and information such as the material, structure, shape, mass, radius and thickness of the thrust unit 24 (step S11).

Next, the CPU 14 reads from the acceleration response magnification memory 12 the acceleration response magnification corresponding to the type of disconnecting switch input from the input unit 11 (step S12). When the type of disconnecting switch input from the input unit 11 is a horizontal central single-point disconnecting switch and the rated voltage is 72 kV, the acceleration response magnification f1 (for example, 6.2 times) is read from the acceleration response magnification memory 12. . When the type of disconnecting switch is a horizontal two-point disconnecting switch and the rated voltage is 168 kV, the acceleration response magnification f5 (for example, 5.8 times) is read from the acceleration response magnification memory 12 .

The bending moment calculator 17 uses the acceleration response magnification read from the acceleration response magnification memory 12 to calculate the resonance sine of 0.3 G (3 m/S ² ) at the thrust section 24 or the insulator bases 23A1 and 23B1 by 3. A bending moment M when a wave is input (three times of vibration) is calculated by the formula (1) (step S13).

M=0.3×f×Σmr (1)
Here, f is the acceleration response magnification read from the acceleration response magnification memory 12 . m is the mass of each element of the thrust portion 24 and the insulator portion that constitute the disconnecting switch shown in FIGS. r represents the distance between each element of the thrust portion 24 and the insulator portion and the ground. It can be seen from the equation (1) that the bending moment M changes according to the acceleration response magnification f.

Next, in step S14, the thrust section 24 is selected (step S14). When the thrust portion 24 is bolted as shown in FIG. 7, the sharing of the bolted structure is calculated by Equation (2).

Mmax=M/L1 (2)
Here, L1 is the distance between two diagonal bolt holes among the four bolt holes provided at the four corners of the support plate 27 .

Next, the bending moment calculator 17 calculates the bending moment of the critical cross-section of the thrust portion 24 by the equation (3) based on the bending moment Mmax calculated by the equation (2) (step S15).

M1=Mmax×L2 (3)
Here, L2 is the shortest distance between the critical cross section and the bolt hole closest to the critical cross section.

Depending on the material (material) and structure (shape) of the thrust portion 24, the stress distribution of the dangerous cross section of the thrust portion 24 and the dangerous cross section of the insulator portion changes. For this reason, the section modulus calculator 18 calculates a stress distribution coefficient representing the stress distribution of the dangerous section based on the bending moment of the dangerous section of the thrust section 24 calculated by the bending moment calculator 17 and the material and shape of the thrust section 24. (Step S16), and the section modulus is calculated based on the calculated stress distribution coefficient (Step S17).

In the weld reinforcement type thrust portion 24 shown in FIG. 5, stress is distributed over the entire circumference of the cylinder, so the stress distribution angle as the stress distribution coefficient is 360 degrees, and the section modulus Z of the pipe shape is given by equation (4). Calculated by

Z={π(do ⁴ −di ⁴ )/do}/32 (4)
Here, do is the diameter of the thrust portion 24 . di is the inner diameter of the thrust portion 24;

Further, the thrust part 24 of direct attachment type by bolts shown in FIG. 7 has a rectangular or square shape, and is made of cast iron and brittle material. Therefore, the distribution of stress is concentrated on the side that receives the tension, and the stress is distributed along the thrust cylinder.

Also, the stress distribution angle θ as a stress distribution coefficient is roughly determined by the thrust shape. The stress distribution angle θ differs depending on whether the thrust portion 24 is rectangular or square. The stress distribution angle θ is larger when the thrust portion 24 is square than when it is rectangular.

The section modulus calculation unit 18 calculates the width of the dangerous cross section from the distribution angle θ by Equation (5).

L4=(d×π)×(θ°/360°) (5)
d is the diameter of the thrust portion 24;

Next, the section modulus calculation unit 18 calculates the section modulus Z from the width L4 of the critical section using the equation (6).

Z=(L4× ^t2 )/6 (6)
t is the thickness of the thrust portion 24;

Next, the generated stress calculator 19 calculates the generated stress σ of the dangerous cross-section based on the bending moment of the dangerous cross-section and the critical section modulus Z (step S18).

σ=M1/Z (7)
The safety factor calculation unit 20 calculates the safety factor sf of the thrust part 24 using the equation (8) based on the stress σ generated in the dangerous cross section and the allowable stress σmax calculated by the generated stress calculation unit 19 (step S19).
sf=σmax/σ (8)
If the material of the thrust portion 24 is steel and the stress is distributed linearly from one end to the other of the support plate, the section modulus Z is calculated by equation (6) with the width from one end to another as L4. .

On the other hand, in step S14, when the insulator portions 23A and 23B are selected, the bending moment calculator 17 calculates the bending moments of the dangerous sections of the insulator base portions 23A1 and 23B1 based on the bending moments of the insulator base portions 23A1 and 23B1 ( step S20).

The safety factor calculator 20 calculates the safety of the insulators 23A and 23B based on the bending moment of the dangerous section of the insulator bases 23A1 and 23B1 calculated by the bending moment calculator 17 and the guaranteed breaking moment Ma of the insulators 23A and 23B. A rate Sf is calculated by the formula (9) (step S21). The guaranteed breaking moment of insulator portions 23A and 23B is represented by Equation (10).

Sf=Ma/M (9)
Ma={π/(D) ³ ·σa×10 ⁻³ }/32 (N·m) (10)
σa is the guaranteed breaking stress (N/mm ² ). D is the barrel diameter (mm) of the lowermost insulator.

As described above, according to the disconnecting switch seismic evaluation apparatus according to the embodiment, the section modulus is calculated based on the acceleration response magnification corresponding to the type of the disconnecting switch and the material and shape of the thrust portion, and the calculated section modulus and Calculate the stress generated in the dangerous cross section based on the bending moment of the dangerous cross section. Therefore, the generated stress of the thrust section can be calculated by calculation suitable for the actual disconnecting switch and thrust section.

Also, the safety factor of the thrust part can be calculated based on the generated stress and the allowable stress. Further, when the stress is distributed in a cylindrical shape all around the thrust portion, the critical section modulus can be calculated based on the diameter of the critical section.

In addition, when stress is distributed in the thrust cylindrical shape of the thrust part, the width of the dangerous cross section is calculated based on the diameter of the thrust part and the stress distribution angle, and the section modulus is calculated based on the width of the dangerous cross section and the thickness of the thrust part. can be calculated.

In addition, the bending moment of the insulator base is calculated based on the acceleration response magnification corresponding to the type of disconnecting switch, and the bending moment of the dangerous section of the insulator base is calculated based on the bending moment of the insulator base. Therefore, it is possible to calculate the safety factor of the insulator part by calculation suitable for the actual disconnecting switch and the insulator part.

11 Input unit 12 Acceleration response magnification memory 14 CPU
15 Program memory 16 Output unit 17 Bending moment calculation unit 18 Section modulus calculation unit 19 Generated stress calculation unit 20 Safety factor calculation unit 21 Operating devices 22a to 22b, 22A, 22B Bases 23a to 23c1, 23c2 Rotating insulators 23A, 23B Insulator unit 23A1 , 23B1 insulator bases 23d1, 23d2 to 23e1, 23e2 fixed insulators 24a to 24c thrust parts 24A1, 24B1 thrust shafts 24A2, 24B2 bearings 25a to 25c conductive parts 26A, 26B bolts

Claims (10)

A seismic evaluation device for a disconnecting switch that calculates the seismic strength of the thrust part of the disconnecting switch,
a memory that associates and stores types of the disconnecting switch and acceleration response magnifications that differ for each type;
The acceleration response magnification corresponding to the input disconnecting switch type is read from the memory, the bending moment of the thrust section is calculated based on the read acceleration response magnification, and the calculated bending moment of the thrust section is calculated. a bending moment calculation unit for calculating the bending moment of the dangerous section of the thrust part based on the
A stress distribution coefficient representing the stress distribution of the dangerous cross section is calculated based on the bending moment of the dangerous cross section calculated by the bending moment calculator and the material and shape of the thrust portion, and the dangerous cross section is calculated based on the stress distribution coefficient. a section modulus calculator for calculating the section modulus of
a generated stress calculation unit that calculates the stress generated in the dangerous cross-section based on the section modulus calculated by the section modulus calculation unit and the bending moment of the dangerous cross-section;
A seismic evaluation device for a disconnecting switch, comprising: 2. The disconnecting switch seismic evaluation apparatus according to claim 1, further comprising a safety factor calculation unit for calculating the safety factor of the thrust part based on the generated stress and the allowable stress. 3. The disconnection according to claim 1, wherein the section modulus calculator calculates the section modulus based on the diameter of the dangerous section when the stress is distributed in a cylindrical shape all around the thrust section. Seismic evaluation equipment for vessels. The section modulus calculation unit calculates the width of the dangerous section based on the diameter of the thrust section and the stress distribution angle when the stress is distributed in the thrust cylindrical shape of the thrust section, and calculates the width of the dangerous section and the thrust. 3. The seismic evaluation apparatus for a disconnecting switch according to claim 1, wherein the section modulus is calculated based on the thickness of the section. A seismic evaluation device for a disconnecting switch that calculates the seismic resistance strength of the insulator of the disconnecting switch,
a memory that associates and stores types of the disconnecting switch and acceleration response magnifications that differ for each type;
The acceleration response magnification corresponding to the type of the input disconnecting switch is read from the memory, the bending moment of the insulator base of the insulator portion is calculated based on the read acceleration response magnification, and the bending moment of the insulator base is calculated. a bending moment calculator for calculating the bending moment of the dangerous section of the insulator base based on
a safety factor calculation unit that calculates the safety factor of the insulator based on the bending moment of the dangerous section of the insulator base calculated by the bending moment calculation unit and the guaranteed breaking moment of the insulator;
A seismic evaluation device for a disconnecting switch, comprising: A computer program for calculating the seismic strength of a thrust section of a disconnecting switch, comprising:
a storing step of associating the type of the disconnecting switch with an acceleration response factor different for each type and storing the same in a memory;
The acceleration response magnification corresponding to the input disconnecting switch type is read from the memory, the bending moment of the thrust section is calculated based on the read acceleration response magnification, and the calculated bending moment of the thrust section is calculated. a bending moment calculation step of calculating the bending moment of the dangerous section of the thrust portion based on the
A stress distribution coefficient representing the stress distribution of the dangerous cross section is calculated based on the calculated bending moment of the dangerous cross section and the material and shape of the thrust portion, and the section modulus of the dangerous cross section is calculated based on the stress distribution coefficient. a section modulus calculation step;
a generated stress calculation step of calculating the stress generated in the dangerous cross section based on the calculated section modulus and the bending moment of the dangerous cross section;
A computer-readable recording medium storing a computer program characterized by comprising: 7. The recording medium according to claim 6, further comprising a safety factor calculation step of calculating a safety factor of said thrust portion based on said generated stress and allowable stress. The section modulus calculation step calculates the critical section modulus based on the width of the critical section and the thickness of the thrust section when the stress is distributed from end to end of the support plate of the thrust section. 8. The recording medium according to claim 6 or 7. In the section modulus calculation step, when the stress is distributed in the thrust cylinder of the thrust portion, the width of the dangerous cross section is calculated based on the diameter of the thrust portion and the stress distribution angle, and the width of the dangerous cross section and the thrust 8. The recording medium according to claim 6, wherein the section modulus is calculated based on the thickness of the portion. A computer program for calculating the seismic strength of an insulator of a disconnecting switch,
a storing step of associating the type of the disconnecting switch with an acceleration response factor different for each type and storing the same in a memory;
The acceleration response magnification corresponding to the type of the input disconnecting switch is read from the memory, the bending moment of the insulator base of the insulator portion is calculated based on the read acceleration response magnification, and the bending moment of the insulator base is calculated. a bending moment calculation step of calculating the bending moment of the dangerous section of the insulator base based on
a safety factor calculation step of calculating the safety factor of the insulator part based on the calculated bending moment of the dangerous section of the insulator base and the guaranteed breaking moment of the insulator part;
A computer-readable recording medium storing a computer program characterized by comprising:

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