CN107063611A - Pillar class composite electrical equipment vibration prevention appraisal procedure - Google Patents
Pillar class composite electrical equipment vibration prevention appraisal procedure Download PDFInfo
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- CN107063611A CN107063611A CN201710233506.0A CN201710233506A CN107063611A CN 107063611 A CN107063611 A CN 107063611A CN 201710233506 A CN201710233506 A CN 201710233506A CN 107063611 A CN107063611 A CN 107063611A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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Abstract
The invention provides a kind of pillar class composite electrical equipment vibration prevention appraisal procedure, this method comprises the following steps：Beam test Stress calculation step, pair carries out whole post bending resistance failure test with the test specimen of load bearing component identical first of pillar class composite electrical equipment, calculates the stress σ that the first test specimen destroys positionU；Shaketalle test Stress calculation step, pair with the second test specimen of pillar class composite electrical equipment identical carry out shaking-table test, calculate the second test specimen destroy position stress σEWith the top displacement of the second test specimen；Appraisal procedure, if σE≤σU/ 1.67, also, the second test specimen top displacement be less than or equal to preset displacement when, determine that pillar class composite electrical equipment meets shockproof requirements.In the present invention, the appraisal procedure substantially increases the degree of accuracy of Seismic Evaluation result, and then ensure that the safe operation of power transmission engineering in being considered in the material characteristicses and design feature of pillar class composite electrical equipment.
Description
Technical field
It is anti-in particular to a kind of pillar class composite electrical equipment the present invention relates to technical field of power systems
Shake appraisal procedure.
Background technology
At present, extra-high voltage alternating current-direct current engineering largely uses pillar class composite electrical equipment, therefore, pillar class composite wood
The stability of material electrical equipment is particularly important.Wherein, geological process is that influence pillar class composite electrical equipment is stable
Property key factor, it is generally compound in pillar class in order to reduce influence of the geological process to pillar class composite electrical equipment
Material electrical equipment is installed on before power transmission engineering, can carry out Seismic Evaluation, only pillar to pillar class composite electrical equipment
Class composite electrical equipment meets shockproof requirements, just can apply to power transmission engineering.
The anti-seismic performance of pillar class composite electrical equipment is typically the shock test with reference to common porcelain electrical equipment
And appraisal procedure is estimated, however, the fragility of common ceramic material is more obvious, and composite has ductile fracture
The characteristics of, so, the material and structure of pillar class composite electrical equipment and common porcelain electrical equipment are respectively provided with very big
Difference, if the Seismic Evaluation method with reference to common porcelain electrical equipment is entered to the anti-seismic performance of pillar class composite electrical equipment
Row Seismic Evaluation, the Seismic Evaluation result for being easily caused pillar class composite electrical equipment is inaccurate, and then to power transmission engineering
Bring major safety risks.
The content of the invention
In consideration of it, the present invention proposes a kind of pillar class composite electrical equipment vibration prevention appraisal procedure, it is intended to solve existing
The anti-seismic performance for having technology B-C post class composite electrical equipment is the Seismic Evaluation method with reference to common porcelain electrical equipment
What is be estimated is easily caused the problem of Seismic Evaluation result is inaccurate.
The present invention proposes a kind of pillar class composite electrical equipment vibration prevention appraisal procedure, and this method includes following step
Suddenly：Beam test Stress calculation step, pair enters with the test specimen of load bearing component identical first of pillar class composite electrical equipment
The whole post bending resistance failure test of row, calculates the stress σ that the first test specimen destroys positionU；Shaketalle test Stress calculation step, pair with branch
The second test specimen of post class composite electrical equipment identical carries out shaking-table test, calculates the second test specimen destruction position
Stress σEWith the top displacement of the second test specimen；Appraisal procedure, if σE≤σU/ 1.67, also, the top displacement of the second test specimen is small
When equal to preset displacement, determine that pillar class composite electrical equipment meets shockproof requirements.
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, beam test Stress calculation step
Suddenly further comprise：First installs sub-step, and foil gauge is installed on to the first default strain testing position of the first test specimen, and will
First displacement meter is installed on the predeterminated position of the first test specimen；First load applies sub-step, to the predeterminated position of the first test specimen by
Level applies and the perpendicular loading force of the first test specimen, when the first test specimen visible damage occurs or internal sabotage occurs, stopping
Apply loading force；First determines sub-step, determines the destruction position of the first test specimen；First Stress calculation sub-step, according to first
The modulus of elasticity of test specimen, the strain at the first test specimen destruction position and the loading force applied to the first test specimen, calculate the first test specimen and break
The stress σ at bad positionU。
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, the first load applies sub-step
Further comprise：The loading force perpendicular with the first test specimen is applied step by step to the predeterminated position of the first test specimen；Obtain loading force-position
Move curve；When visible damage occurs in the first test specimen or internal sabotage occurs in the first test specimen, stop adding the application of the first test specimen
Power is carried, wherein, the internal sabotage of the first test specimen is the loading force bust more than 20% in loading force-displacement curve or loading
The slope of force-displacement curve is less than the 50% of initial slope.
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, first determines in sub-step, if
There is visible damage in first test specimen, and the position where the first nearest default strain testing position of distance destruction position is defined as
The destruction position of first test specimen；If internal sabotage occurs in the first test specimen, first preset the root of the test specimen of distance first is nearest
Position where strain testing position is defined as the destruction position of the first test specimen.
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, the first Stress calculation sub-step
Further comprise：According to formula σu1=E εuCalculate the first stress σ that the first test specimen destroys positionu1, in above formula, E is the first test specimen
Modulus of elasticity, εuThe strain at position is destroyed for the first test specimen；According to formula Lu=0.5 × (| LU is drawn|+|LU is pressed|) calculate the first examination
Part destroys position to the first test specimen top apart from Lu, in above formula, LU is drawnFor the first test specimen destroy position tension side to first examination
The distance on part top, LU is pressedThe compression-side at position is destroyed to the distance on the first test specimen top for the first test specimen；According to formulaCalculate in the bending resistance the moment of inertia W that the first test specimen destroys position, above formula, d is that the first test specimen destroys the straight of position
Footpath；According to formulaCalculate the second stress σ that the first test specimen destroys positionu2, in above formula, F is that loading force-displacement is bent
The maximum of loading force in line；If σu1With σu2Difference be less than 10%, by the first stress σu1It is defined as the first test specimen destruction position
Stress σU；If σu1With σu2Difference be more than or equal to 10%, by the second stress σu2It is defined as the stress that the first test specimen destroys position
σU。
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, the first load applies sub-step
Also include between the first determination sub-step：Modulus of elasticity calculates sub-step, according to the loading forces at different levels applied to the first test specimen
With the strain of the under loading forces at different levels each first default strain testing position, the modulus of elasticity of the first test specimen is calculated.
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, modulus of elasticity calculates sub-step
Further comprise：According to formulaCalculate the bending resistance the moment of inertia W at each first default strain testing positioni, above formula
In, diFor diameter of first test specimen at each first default strain testing position；According to formulaCalculate the first test specimen
Elastic modulus E under every grade of loading force at each first default strain testing positioni, in above formula, FjTo apply to the first test specimen
Every grade of loading force, LiFor each first default strain testing position to the distance on the first test specimen top, εiFor in every grade of loading force
Strain at each first default strain testing position down；According to formulaCalculate the first examination under every grade of loading force
The average elastic modulus E of partj, in above formula, n is the quantity of the first default strain testing position；By the first examination under loading forces at different levels
The average elastic modulus E of partjAverage value be defined as the elastic modulus E of the first test specimen.
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, shaketalle test Stress calculation
Step further comprises：Second installs sub-step, and foil gauge is installed on to the second default strain testing position of the second test specimen, and
Second displacement meter is installed on to the top of the second test specimen；Second load applies sub-step, applies default earthquake lotus to the second test specimen
Carry；Second determines sub-step, determines the destruction position of the second test specimen；Second Stress calculation sub-step, according to the bullet of the second test specimen
Property modulus and the second test specimen destroy position strain, calculate the second test specimen destroy position stress σE；Displacement determines sub-step, root
The top displacement of the second test specimen is determined according to second displacement meter.
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, second determines in sub-step, if
Second test specimen is damaged, and the position where the second nearest default strain testing position of distance destruction position is defined as into the second test specimen
Destroy position；If the second test specimen is not damaged, the destruction position of the first test specimen in whole post bending resistance failure test is defined as the second examination
The destruction position of part.
Further, in above-mentioned pillar class composite electrical equipment vibration prevention appraisal procedure, the second Stress calculation sub-step
In, according to formula σE=E εECalculate the stress σ that the second test specimen destroys positionE, in above formula, E is the modulus of elasticity of the second test specimen, εE
The strain at position is destroyed for the second test specimen.
In the present invention, the stress and shaking-table test of the first test specimen are calculated according to whole post bending resistance failure test
The top displacement for calculating the second test specimen in the ratio between stress of the second test specimen and shaking-table test comes to pillar class
The anti-seismic performance of composite electrical equipment is estimated, and the appraisal procedure can be by the material of pillar class composite electrical equipment
Material feature and design feature substantially increase the degree of accuracy of Seismic Evaluation result, and then ensure that power transmission engineering in being considered in
Safe operation, the anti-seismic performance for solving prior art B-C post class composite electrical equipment is electric with reference to common porcelain
What the Seismic Evaluation method of equipment was estimated is easily caused the problem of Seismic Evaluation result is inaccurate.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the flow chart of pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention；
Fig. 2 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention in, beam test
The flow chart of Stress calculation step；
Fig. 3 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention in, the first test specimen
Structural representation；
Fig. 4 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention in, the first load
Apply the flow chart of sub-step；
Fig. 5 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention in, the first stress
Calculate the flow chart of sub-step；
Fig. 6 is the another flow of pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention
Figure；
Fig. 7 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention in, modulus of elasticity
Calculate the flow chart of sub-step；
Fig. 8 is in pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention, shake table tries
Test the flow chart of Stress calculation step；
Fig. 9 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention in, the second test specimen
Structural representation；
Figure 10 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention in, each second
The arrangement schematic diagram of default strain testing position.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to Fig. 1, Fig. 1 is the stream of pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention
Cheng Tu.As illustrated, pillar class composite electrical equipment vibration prevention appraisal procedure may include steps of：
Beam test Stress calculation step S1, the load bearing component identical first pair with pillar class composite electrical equipment
Test specimen carries out whole post bending resistance failure test, calculates the stress σ that the first test specimen destroys positionU。
Specifically, pillar class composite electrical equipment to be tested is broken as the first test specimen carrying out whole post bending resistance
During bad experiment, the first test specimen should include all load bearing components, and the load bearing component can include：The company of electrical equipment and each several part
Connect, also, the first test specimen should be not comprising non-bearing part, the non-stress part such as sheath, grading ring, therefore, the first test specimen
Only contain the load bearing component of pillar class composite electrical equipment to be tested.Whole post bending resistance destruction is carried out to the first test specimen
After the completion of experiment, whole post bending resistance failure test, the destruction position of the first test specimen is determined, and calculate answering for the first test specimen destruction position
Power σU。
Shaketalle test Stress calculation step S2, pair with the second test specimen of pillar class composite electrical equipment identical carry out
Shaking-table test, calculates the stress σ that the second test specimen destroys positionEWith the top displacement of the second test specimen.
Specifically, then whole and unbroken pillar class composite electrical equipment to be tested is taken, as
Two test specimens.When carrying out shaking-table test, the second test specimen should be the complete pillar class comprising all annexes and be combined
Material electrical equipment, that is, include：All load bearing components and non-bearing part, wherein, load bearing component includes：Electrical equipment and each
Partial connection, non-bearing part includes：The non-stress part such as sheath, grading ring.First test specimen and the second test specimen are to be measured
The pillar class composite electrical equipment of examination, simply, the first test specimen is only electrically set including pillar class composite to be tested
Standby load bearing component, and the second test specimen includes the load bearing component and non-bearing part of pillar class composite electrical equipment.It is right
Second test specimen is carried out after the completion of shaking-table test, shaking-table test, determines the destruction portion of the second test specimen
Position, and calculate the stress σ that the second test specimen destroys positionEWith the top displacement of the second test specimen.
Appraisal procedure S3, if σE≤σU/ 1.67, also, the second test specimen top displacement be less than or equal to preset displacement when, really
Determine pillar class composite electrical equipment and meet shockproof requirements.
Specifically, only σ is met simultaneouslyE≤σU/ 1.67 and second test specimen top displacement be less than or equal to preset displacement when,
It just can determine that pillar class composite electrical equipment to be tested meets shockproof requirements.Wherein, the branch below 220kV voltage class
Preset displacement of the post class composite electrical equipment in shaking-table test is 210mm, then the second test specimen top
Displacement should be controlled within 210mm.The pillar class composite electrical equipment of 220kV-330kV grades is in earthquake simulation shaking table
Preset displacement in experiment is 260mm, then the top displacement of the second test specimen should be controlled within 260mm.330kV-500kV grades
Preset displacement of the pillar class composite electrical equipment in shaking-table test be 310mm, then the second test specimen
Top displacement should be controlled within 310mm.The pillar class composite electrical equipment of 500kV-800kV grades shakes in earthquake simulation
Preset displacement in dynamic platform experiment is 460mm, then the top displacement of the second test specimen should be controlled within 460mm.Exchange 1000kV
Or preset displacement of the direct current ± 800kV pillar class composite electrical equipment in shaking-table test is 600mm,
Then the top displacement of the second test specimen should be controlled within 600mm.Or, the height of the top displacement of the second test specimen and the second test specimen
Than less than 1/18.
As can be seen that in the present embodiment, the stress and earthquake mould of the first test specimen are calculated according to whole post bending resistance failure test
Intend the top position that shaketalle test calculates the second test specimen in the ratio between stress of the second test specimen and shaking-table test
In-migration is estimated to the anti-seismic performance of pillar class composite electrical equipment, and the appraisal procedure can be by pillar class composite
The material characteristicses and design feature of electrical equipment substantially increase the degree of accuracy of Seismic Evaluation result in being considered in, and then really
The safe operation of power transmission engineering is protected, the anti-seismic performance for solving prior art B-C post class composite electrical equipment is reference
What the Seismic Evaluation method of common porcelain electrical equipment was estimated is easily caused the problem of Seismic Evaluation result is inaccurate.
Referring to Fig. 2, during Fig. 2 is pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention,
The flow chart of beam test Stress calculation step.As illustrated, beam test Stress calculation step S1 may further include as
Lower step：
First installs sub-step S11, and foil gauge is installed on to the first default strain testing position of the first test specimen, and by the
One displacement meter is installed on the predeterminated position of the first test specimen.
Specifically, referring to Fig. 3, the first test specimen 1 is generally column.First test specimen 1 is provided with the multiple first default strains
Test position 5, each first default short transverse (side from top to bottom Fig. 3 shown in of the strain testing position 5 along the first test specimen 1
To) arrangement.Because the first test specimen 1 is column, so, in order to more preferably test the strain at each position of the first test specimen 1, each first
Default strain testing position 5 includes：Two first default strain testing points, two first default strain testings o'clock are relative to the
The Central Symmetry of one test specimen, also, two first default strain testing points are in the same circumference of the first test specimen 1 and in same
Highly, and two first default strain testing points are respectively placed in the left and right sides of the first test specimen.Foil gauge 2 is multiple, strain
The quantity of piece 2 is identical with the quantity of the first default strain testing point, each foil gauge 2 be installed on correspondingly each first it is default should
Become test point.The predeterminated position of first test specimen 1 can be the top (top shown in Fig. 3) of the first test specimen 1, by the first displacement meter
4 are installed on the top of the first test specimen 1, certainly, and predeterminated position can also determine that the present embodiment is not done to this according to actual conditions
Any limitation.
First load applies sub-step S12, applies perpendicular with the first test specimen step by step to the predeterminated position of the first test specimen
Loading force, when the first test specimen visible damage occurs or internal sabotage occurs, stops applying loading force.
Specifically, referring to Fig. 4, first load applies sub-step S12 and may further include following steps：
Sub-step S121, the loading force perpendicular with the first test specimen is applied to the predeterminated position of the first test specimen step by step.
Specifically, the predeterminated position of 3 pair of first test specimen 1 of actuator applies loading force, wherein, the predeterminated position should be with first
The installation site of displacement meter 4 is corresponding, that is to say, that the position that 3 pairs of actuator is provided with the first displacement meter 4 applies loading force.
In the present embodiment, the first displacement meter 4 is installed on the top of the first test specimen 1, and the top of 3 pair of first test specimen 1 of actuator, which applies, to be added
Carry power.The loading force applies step by step, also, the direction of loading force and the placement direction of the first test specimen are perpendicular, if first
The horizontal positioned of test specimen 1, then the direction of loading force is vertical direction；If the first test specimen 1 is disposed vertically, the direction of loading force is water
Square to.
Sub-step S122, obtains loading force-displacement curve.
Specifically, the loading force applied step by step according to the predeterminated position to the first test specimen 1 in whole post beam test and
The displacement that one displacement meter 5 is tested out, gets the loading force-displacement curve of the predetermined position of the first test specimen 1.In the present embodiment
In, the loading force and the first displacement meter 5 applied step by step according to the top to the first test specimen 1 tested out under loading forces at different levels
The displacement at the top of one test specimen 1, gets the loading force-displacement curve at the top of the first test specimen.Wherein, in loading force-displacement curve
Abscissa be displacement, ordinate is loading force.
3rd sub-step S123, when visible damage occurs in the first test specimen or internal sabotage occurs in the first test specimen, stops
Loading force is applied to the first test specimen, wherein, the internal sabotage of the first test specimen is the loading force bust in loading force-displacement curve
More than 20% or load force-displacement curve slope be less than initial slope 50%.
Specifically, the macroscopic destruction that the visible damage of the first test specimen 1 is behaved.For the visible broken of the first test specimen
The slope of loading force bust more than 20% and loading force-displacement curve is less than initial slope in bad, loading force-displacement curve
50% these three situations, as long as there is any situation, then stop applying loading force, i.e., whole post beam test to the first test specimen 1
Stop.
First determines sub-step S13, determines the destruction position of the first test specimen.
Specifically, if visible damage occurs in the first test specimen 1, by the first nearest default strain testing position of distance destruction position
Position where putting is defined as the destruction position of the first test specimen 1.When it is implemented, the destruction position of the first test specimen is to occur to break
Bad position, for the ease of follow-up Stress calculation, so the first default strain testing position institute by distance destruction position recently
Position as the calculating of the first test specimen 1 destruction position.When the first nearest default strain testing position of distance destruction position
When putting 5 and having two, position optionally where one of them first default strain testing position 5 is defined as the calculating of the first test specimen 1
Destruction position.
If internal sabotage occurs in the first test specimen 1, by the first nearest default strain testing position of the root of the first test specimen of distance 1
Position where putting is defined as the destruction position of the first test specimen, wherein, the root of the first test specimen is the bottom of the first test specimen (figure
Bottom shown in 3).
First Stress calculation sub-step S14, according to the modulus of elasticity of the first test specimen, the first test specimen destroy position strain and
The loading force applied to the first test specimen, calculates the stress σ that the first test specimen destroys positionU。
Specifically, the modulus of elasticity of the first test specimen 1 can be worth as defined in producer, can also be according to whole post beam test meter
Draw.There are two first default strains because the first test specimen 1 destroys the first default strain testing position 5 corresponding to position
Test point, the average value of the absolute value for the strain that the foil gauges 2 at two first default strain testing points are tested out is used as the
One test specimen destroys the strain at position.
As can be seen that in the present embodiment, by setting each step in whole post beam test, it can be ensured that the first test specimen should
It is accurate that power is calculated, and then improves the degree of accuracy of the Assessment of Seismic Vulnerability of pillar class composite electrical equipment, also, simply
It is convenient.
Referring to Fig. 5, during Fig. 5 is pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention,
The flow chart of first Stress calculation sub-step.As illustrated, the first Stress calculation sub-step S14 may further include following step
Suddenly：
Sub-step S141, according to formula σu1=E εuCalculate the first stress σ that the first test specimen destroys positionu1, in above formula, E is
The modulus of elasticity of first test specimen, εuThe strain at position is destroyed for the first test specimen.
Specifically, can be according to the after the above-mentioned first determination sub-step S13 determines the destruction position of the first test specimen 1
One test specimen 1 destroys the strain at position to calculate the first stress σ that the first test specimen 1 destroys positionu1.Wherein, the bullet of the first test specimen 1
Property modulus E can be worth as defined in producer, can also be calculated according to whole post beam test.According to formula εu=0.5 × (|
εU is drawn|+|εU is pressed|) calculate the strain stress that the first test specimen 1 destroys positionu, wherein, first corresponding to the first test specimen 1 destruction position is pre-
If the strain for testing out foil gauge 2 at the first of tension side the default strain testing point in strain testing position is designated as εU is drawn, in figure
In 3, εU is drawnThe strain at strain testing point is preset for the first of left side.Corresponding to first test specimen 1 destruction position first it is default should
Become the strain for testing out foil gauge 2 at the first of compression-side the default strain testing point in test position and be designated as εU is pressed, in figure 3,
εU is pressedThe strain at strain testing point is preset for the first of right side.
Sub-step S142, according to formula Lu=0.5 × (| LU is drawn|+|LU is pressed|) the first test specimen destruction position is calculated to the first examination
Part top apart from Lu, in above formula, LU is drawnThe tension side at position is destroyed to the distance on the first test specimen top, L for the first test specimenU is pressedFor
First test specimen destroys the compression-side at position to the distance on the first test specimen top.
Specifically, the first test specimen 1 is carried out after whole post beam test, and the destruction position of the first test specimen 1 may deform,
The first test specimen 1 should then be calculated and be in tension side to the top of the first test specimen 1 apart from LU is drawn, i.e. the first test specimen 1 destruction position in Fig. 3
Left side to the first test specimen top distance；The first test specimen 2 should also be calculated and be in compression-side to the distance on the top of the first test specimen 2
LU is pressed, i.e. the distance on right side to the first test specimen top at the first test specimen 1 destruction position in Fig. 3.
Sub-step S143, according to formulaCalculate in the bending resistance the moment of inertia W that the first test specimen destroys position, above formula,
D is the diameter that the first test specimen destroys position.
Specifically, because the destruction position of the first test specimen 1 may deform, so it needs to be determined that the first test specimen 1 is broken
The diameter d at bad position.
Sub-step S144, according to formulaCalculate the second stress σ that the first test specimen destroys positionu2, in above formula, F
For the maximum of loading force in loading force-displacement curve.
Specifically, can also basis after the above-mentioned first determination sub-step S13 determines the destruction position of the first test specimen 1
The loading force at the destruction position of the first test specimen 1 come calculate the first test specimen 1 destroy position the second stress σu2.Wherein, loading force F
For the limit loading force of the first test specimen 1, the limit loading force can be determined according to loading force-displacement curve, limit loading
Power is the maximum of loading force in loading force-displacement curve.Electrically set if the first test specimen 1 is open side type pillar class composite
It is standby, then it will load the corresponding loading force of the first flex point of the terminal of stretch section or loading force-displacement curve in force-displacement curve
It is used as the limit loading force F of the first test specimen；, will loading if the first test specimen 1 is polystyle pillar class composite electrical equipment
Maximum load masterpiece after the terminal or mucilage binding of stretch section are destroyed in force-displacement curve loads for the limit of the first test specimen
Power F.L in formulauIt can be calculated in above-mentioned sub-step S142, W can be calculated in sub-step S143.
Sub-step S145, if σu1With σu2Difference be less than 10%, by the first stress σu1It is defined as the first test specimen destruction position
Stress σU；If σu1With σu2Difference be more than or equal to 10%, by the second stress σu2It is defined as the stress that the first test specimen destroys position
σU。
As can be seen that in the present embodiment, according to strain and loading force two kinds of situations point at the destruction position of the first test specimen 1
The first stress and the second stress that the first test specimen destroys position are not calculated, and first is determined further according to the first stress and the second stress
Test specimen destroys the stress at position, it can be ensured that the calculating of the stress at the first test specimen 1 destruction position is accurate, and then improves pillar class
The degree of accuracy of composite electrical equipment vibration prevention assessment result.
Referring to Fig. 6, Fig. 6 be pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention again
One flow chart.As illustrated, beam test Stress calculation step S1 may further include following steps：
First installs sub-step S11, and foil gauge is installed on to the first default strain testing point of the first test specimen, and by first
Displacement meter is installed on the predeterminated position of the first test specimen.
First load applies sub-step S12, applies perpendicular with the first test specimen step by step to the predeterminated position of the first test specimen
Loading force, when the first test specimen visible damage occurs or internal sabotage occurs, stops applying loading force.
Modulus of elasticity calculates sub-step S15, according to each under the loading forces at different levels and loading force at different levels applied to the first test specimen
The strain of first default strain testing position, calculates the modulus of elasticity of the first test specimen.
First determines sub-step S13, determines the destruction position of the first test specimen.
First Stress calculation sub-step S14, according to the modulus of elasticity of the first test specimen, the first test specimen destroy position strain and
The loading force applied to the first test specimen, calculates the stress σ that the first test specimen destroys positionU。
It should be noted that in the present embodiment, first, which installs sub-step S11, the first load, applies sub-step S12, first
Determine sub-step S13 and the first Stress calculation sub-step S14 specific implementation process referring to above-described embodiment, the present embodiment
It will not be repeated here.In addition, modulus of elasticity, which calculates the determinations of sub-step S15 and first sub-step S13, does not have sequencing.
As can be seen that in the present embodiment, the modulus of elasticity of the first test specimen is calculated in whole post beam test, Neng Gouyou
Effect ground ensure the first test specimen modulus of elasticity it is accurate, and then improve the first test specimen destroy position Stress calculation the degree of accuracy,
Ensure that the accurate of pillar class composite electrical equipment vibration prevention assessment result.
Referring to Fig. 7, during Fig. 7 is pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention,
Modulus of elasticity calculates the flow chart of sub-step.As illustrated, the modulus of elasticity calculate sub-step S15 may further include it is as follows
Sub-step：
Sub-step S151, according to formulaCalculate the bending resistance inertia at each first default strain testing position
Square Wi, in above formula, diFor diameter of first test specimen at each first default strain testing position.
Specifically, the first default strain testing position 5 is multiple, due to the diameter not necessarily phase of each several part of the first test specimen 1
Together, so, first determine the diameter d of under every grade of loading force the first test specimen 1 at each first default strain testing position 5i, then
According to formulaCalculate resisting for the first test specimen under every grade of loading force at each first default strain testing position 5
Curved the moment of inertia Wi.Wherein, the n of i=1,2,3 ..., n are the quantity of the first default strain testing position 5, although each first it is default should
Becoming test position 5 includes the two first default strain testing points in same circumference and in sustained height, still, two
First default strain testing point still regards one first default strain testing position as.
Sub-step S152, according to formulaCalculate each first default strain under every grade of loading force of the first test specimen
Elastic modulus E at test positioni, in above formula, FjFor the every grade of loading force applied to the first test specimen, LiIt is default for each first
Strain testing position is to the distance on the first test specimen top, εiFor under every grade of loading force at each first default strain testing position
Strain.
Specifically, because loading force applies step by step, so, often applying a loading force needs to calculate the first test specimen 1
Elastic modulus E at each first default strain testing position 5i, until there is visible damage or internal broken in the first test specimen 1
It is bad, even if at this moment actuator 3 continues to loading force, also no longer calculate the first test specimen 1 under the loading force default each first
Modulus of elasticity at strain testing position 5.The j of j=1,2,3 ... is to apply before visible damage or internal sabotage occurs in the first test specimen
The number of times of loading forces at different levels.Strain under every grade of loading force at each first default strain testing position 5 is according to formula εi
=0.5 × (| εI is drawn|+|εI is pressed|) come what is calculated, in the formula, εI is drawnFor in each first default strain testing position tension side should
The strain become at test point, εI is pressedFor the strain at the strain testing point of compression-side in each first default strain testing position.It is public
W in formulaiIt can be calculated in above-mentioned sub-step S151.
Sub-step S153, according to formulaCalculate the average elastic modulus of the first test specimen under every grade of loading force
Ej, in above formula, n is the quantity of the first default strain testing position.
Sub-step S154, by the average elastic modulus E of the first test specimen under loading forces at different levelsjAverage value be defined as the first examination
The elastic modulus E of part.
Specifically, by the average elastic modulus E of the first test specimen 1 calculated under every grade of loading forcejSum again divided by apply
Plus loading forces at different levels number of times, so as to calculate the elastic modulus E of the first test specimen.
As can be seen that in the present embodiment, the modulus of elasticity of the first test specimen being calculated in whole post bending resistance failure test, can be made
The first test specimen modulus of elasticity it is more accurate, and then make it that the stress of the first test specimen calculated is more accurate, ensure that branch
Post class composite electrical equipment vibration prevention assessment result it is accurate.
Referring to Fig. 8, during Fig. 8 is pillar class composite electrical equipment vibration prevention appraisal procedure provided in an embodiment of the present invention,
The flow chart of shaketalle test Stress calculation step.As illustrated, shaketalle test Stress calculation step S2 can be wrapped further
Include：
Second installs sub-step S21, and foil gauge is installed on to the second default strain testing position of the second test specimen, and by the
Two displacement meters are installed on the top of the second test specimen.
Specifically, referring to Fig. 9 and Figure 10, the second default strain testing position 7 is multiple, each second default strain testing position
7 are put to arrange along the short transverse (direction from top to bottom shown in Fig. 9) of the second test specimen 6.Each second default strain testing position
7 are put to may each comprise：Four second default strain testing points, wherein, four second are preset strain testings o'clock along the second test specimen 7
Circumferentially it is uniformly distributed, also, four second default strain testing points are in the same circumference and sustained height of the second test specimen 7, with
And, two of which second presets the strain that strain testing point tests X-direction, and another two second presets strain testing point test Y side
To strain.A foil gauge 2 is respectively mounted at each second default strain testing point.Specifically, the position that foil gauge 2 is arranged can
Referring to the drawings 10.
Before shaking-table test is carried out, it is thus necessary to determine that seismic acceleration of setting up defences, input earthquake parameter, earthquake
Excitation orientation and support amplification coefficient.Wherein, seismic acceleration of setting up defences as represents the target provided fortification against earthquakes with acceleration peak value,
Basic seismic design acceleration is determined according to the factory site seismic regionalization and electric utility level of significance of experimental facilities engineer applied
With seismic acceleration of setting up defences, table 1 specifically can be found in.
Table 1 is seismic fortification intensity and basic seismic design acceleration and the corresponding relation for seismic acceleration of setting up defences
Input earthquake parameter can determine according to 0.9s eigenperiod acceleration response spectrum, wherein, eigenperiod
0.9s acceleration response spectrum can be determined according to the relevant regulations of shaking-table test.
, can for axially symmetric structure and vertically-mounted pillar class composite electrical equipment for seismic stimulation direction
Shaking-table test only is carried out to a horizontal direction input-to-state stabilization.The pillar class composite electricity that non-vertical is installed
Gas equipment, can carry out shaking-table test, wherein vertical to ripple to horizontal direction and the equal input-to-state stabilization of vertical direction
Shape component peak value is 0.65 times to waveform component of level.
Support amplification coefficient is the parameter accounted in pillar class composite electrical equipment not belt supporting frame, then when not
When the pillar class composite electrical equipment of belt supporting frame carries out shaking-table test, in the way of scaling up input
Consider the influence of support.For for AC or DC 220kV-750kV and following pillar class composite electrical equipment, pressing
1.2 multiplying factors amplify input earthquake.For more than AC or DC 750kV pillar class composite electrical equipment, by 1.4
Multiplying factor amplifies input earthquake.
The portion of gold utensil and pipe mother or the like is arranged in actual power transmission engineering at the top of pillar class composite electrical equipment
Part, therefore, when carrying out shaking-table test, need to apply counterweight 10, to simulate pillar class at the top of the second test specimen 6
Stressing conditions of the composite electrical equipment in actual power transmission engineering.Counterweight 10 can be female according to maximum span pipe and gold utensil is total
The half of quality is calculated, when lacking design data, and 500kV and following pillar class composite electrical equipment press 100kg
Using more than 500kV's is used by 150kg counterweights.
When carrying out shaking-table test, the second test specimen can be secured by bolts in earthquake simulation shaking table, spiral shell
The quantity and specification of bolt can with it is consistent in actual power transmission engineering.Second test specimen 6 can also pass through transition connecting plate and earthquake mould
Intend shake table to be connected, it is, of course, also possible to which using other connected modes, the present embodiment does not do this any limitation.For perpendicular
The pillar class composite electrical equipment directly installed, the installation of the second test specimen 6 can be assembled according to Fig. 9.Installed for non-vertical
Pillar electrical equipment, the installation direction of the second test specimen 6 is identical with the installation direction in actual power transmission engineering.Second test specimen 6
Bolt Torque is applied by the design requirement of pillar class composite electrical equipment between each unit.
When carrying out shaking-table test, second displacement meter 8 is installed on the top of the second test specimen 6, second displacement
Meter 8 is used for the displacement for measuring the top of the second test specimen 6, and triple motion meter 9 should be also installed on the table top of earthquake simulation shaking table, the
Triple motion meter 9 is used for the displacement for measuring table top.Second displacement meter 8 and triple motion 9 can use bracing wire displacement meter or laser
Displacement meter, it is of course also possible to use other displacement meters, the present embodiment is not intended to be limited in any to this.Shaken carrying out earthquake simulation
During dynamic platform experiment, acceleration transducer 11 should be also installed on the table top of the second test specimen 6 and earthquake simulation shaking table.
Second load applies sub-step S22, applies default earthquake load to the second test specimen.
Specifically, tested by following operating mode：
A) free damping is tested, the free damping section test damping ratio after discharging or impact by tensioning；
B) white noise dynamic characteristics exploratory test operating mode；
C) waveform iterative test operating mode, waveform iteration reproduces low amplitude value (such as 0.1g) experiment input waveform；
D) seismic wave macroseism input operating condition of test；
E) white noise dynamic characteristics exploratory test operating mode.
Second determines sub-step S23, determines the destruction position of the second test specimen.
Specifically, if the second test specimen 6 is damaged, by where the second nearest default strain testing position of distance destruction position
Position is defined as the second test specimen destruction position.When it is implemented, the destruction position of the second test specimen 6 is the position destroyed,
For the ease of follow-up Stress calculation, so the position where the second nearest default strain testing position of distance destruction position is made
For the destruction position of the calculating of the second test specimen 6.When the second nearest default strain testing position 7 of distance destruction position has two
When, optionally the position where one of them second default strain testing position 7 is defined as the destruction position of the calculating of the second test specimen.
If the second test specimen 6 is not damaged, the destruction position of the first test specimen 1 in whole post bending resistance failure test is defined as the second examination
The destruction position of part 6.Because the first test specimen 1 and the second test specimen 6 are pillar class composite electrical equipment to be tested, so,
Each position of each position of first test specimen 1 and the second test specimen 6 is one-to-one, if the second test specimen 6 is in earthquake simulation shaking table
Do not damaged in experiment, then the corresponding position in destruction position of the first test specimen 1 in whole post bending resistance failure test is determined into the second test specimen 6
Destruction position.
Second Stress calculation sub-step S24, the strain at position is destroyed according to the modulus of elasticity of the second test specimen and the second test specimen,
Calculate the stress σ that the second test specimen destroys positionE。
Specifically, according to formula σE=E εECalculate the stress σ that the second test specimen destroys positionE, in above formula, E is the second test specimen
Modulus of elasticity, εEThe strain at position is destroyed for the second test specimen.
The elastic modulus E of second test specimen can be to be worth as defined in producer, because the first test specimen 1 with the second test specimen 6 is to treat
Pillar class composite electrical equipment is tested, so, the material and structure all same of the first test specimen 1 and the second test specimen 6 then also may be used
Using by whole post beam test modulus of elasticity calculate sub-step S15 calculate the first test specimen 1 modulus of elasticity be used as second examination
The elastic modulus E of part 6.Because each second default strain testing position 7 includes the second default strain testing of two X-directions
Second default strain testing point of point and two Y-directions, so, the strain at the second test specimen 6 destruction position is that the second test specimen 6 is broken
The strain of the second default strain testing position 7 corresponding to bad position, this answers allergic effect to take the strain of X-direction and the strain of Y-direction
In maximum.That is, the average value of the absolute value of the strain at two second of X-direction default strain testing points is true
It is set to the strain stress of X-directionx, i.e. εx=0.5 × (| εx1|+|εx2|), then by two second of Y-direction default strain testing points
The average value of absolute value of strain be defined as the strain stress of Y-directiony, i.e. εy=0.5 × (| εy1|+|εy2|), finally compare X side
To strain stressxWith the strain stress of Y-directiony, maximum is defined as the strain stress that the second test specimen destroys positionE。
Displacement determines sub-step S25, and the top displacement of the second test specimen is determined according to second displacement meter.
As can be seen that in the present embodiment, the Stress calculation of the second test specimen 6 is accurate in shaking-table test, so that
It is able to ensure that the accurate of pillar class composite electrical equipment vibration prevention assessment result.
To sum up, in the present embodiment, the stress of the first test specimen is calculated according to whole post bending resistance failure test and earthquake simulation shakes
The top displacement that dynamic platform tester calculates the second test specimen in the ratio between stress of the second test specimen and shaking-table test comes
Anti-seismic performance to pillar class composite electrical equipment is estimated, and the appraisal procedure can be electric by pillar class composite
The material characteristicses and design feature of equipment substantially increase the degree of accuracy of Seismic Evaluation result, and then ensure that in being considered in
The safe operation of power transmission engineering.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
1. a kind of pillar class composite electrical equipment vibration prevention appraisal procedure, it is characterised in that comprise the following steps：
Beam test Stress calculation step, pair enters with the test specimen of load bearing component identical first of pillar class composite electrical equipment
The whole post bending resistance failure test of row, calculates the stress σ that first test specimen destroys positionU；
Shaketalle test Stress calculation step, pair with the second test specimen of pillar class composite electrical equipment identical carry out earthquake mould
Intend shaketalle test, calculate the stress σ that second test specimen destroys positionEWith the top displacement of second test specimen；
Appraisal procedure, if σE≤σU/ 1.67, also, second test specimen top displacement be less than or equal to preset displacement when, it is determined that
The pillar class composite electrical equipment meets shockproof requirements.
2. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 1, it is characterised in that described anti-
Curved proof stress calculation procedure further comprises：
First installs sub-step, and foil gauge is installed on to the first default strain testing position of first test specimen, and by first
Displacement meter is installed on the predeterminated position of first test specimen；
First load applies sub-step, applies perpendicular with first test specimen step by step to the predeterminated position of first test specimen
Loading force, when first test specimen visible damage occurs or internal sabotage occurs, stops applying loading force；
First determines sub-step, determines the destruction position of first test specimen；
First Stress calculation sub-step, the strain at position is destroyed according to the modulus of elasticity of first test specimen, first test specimen
With the loading force applied to first test specimen, the stress σ that first test specimen destroys position is calculatedU。
3. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 2, it is characterised in that described
One load applies sub-step and further comprised：
The loading force perpendicular with first test specimen is applied step by step to the predeterminated position of first test specimen；
Obtain loading force-displacement curve；
When visible damage occurs in first test specimen or internal sabotage occurs in first test specimen, stop trying described first
Part applies loading force, wherein, the internal sabotage of first test specimen is the loading force bust in the loading force-displacement curve
More than 20% or it is described loading force-displacement curve slope be less than initial slope 50%.
4. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 2, it is characterised in that described
One determines in sub-step,
If visible damage occurs in first test specimen, by where the first nearest default strain testing position of distance destruction position
Position is defined as the destruction position of first test specimen；
If internal sabotage occurs in first test specimen, by the first default strain testing nearest apart from the root of first test specimen
Position where position is defined as the destruction position of first test specimen.
5. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 3, it is characterised in that described
One Stress calculation sub-step further comprises：
According to formula σu1=E εuCalculate the first stress σ that first test specimen destroys positionu1, in above formula, E is the described first examination
The modulus of elasticity of part, εuThe strain at position is destroyed for first test specimen；
According to formula Lu=0.5 × (| LU is drawn|+|LU is pressed|) calculate the first test specimen destruction position to the first test specimen top
Apart from Lu, in above formula, LU is drawnThe tension side at position is destroyed to the distance on the first test specimen top, L for first test specimenU is pressedFor
First test specimen destroys the compression-side at position to the distance on the first test specimen top；
According to formulaCalculate in the bending resistance the moment of inertia W that first test specimen destroys position, above formula, d is described first
Test specimen destroys the diameter at position；
According to formulaCalculate the second stress σ that first test specimen destroys positionu2, in above formula, F is the loading
The maximum of loading force in force-displacement curve；
If σu1With σu2Difference be less than 10%, by the first stress σu1It is defined as the stress σ that first test specimen destroys positionU；If
σu1With σu2Difference be more than or equal to 10%, by the second stress σu2It is defined as the stress σ that first test specimen destroys positionU。
6. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 2, it is characterised in that described
One load applies also to be included between sub-step and the first determination sub-step：
Modulus of elasticity calculates sub-step, according to each first under the loading forces at different levels and loading force at different levels applied to first test specimen
The strain of default strain testing position, calculates the modulus of elasticity of first test specimen.
7. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 6, it is characterised in that the bullet
Property modulus calculate sub-step further comprise：
According to formulaCalculate the bending resistance the moment of inertia W at each first default strain testing positioni, in above formula, diFor
Diameter of first test specimen at each first default strain testing position；
According to formulaFirst test specimen is calculated under every grade of loading force at each first default strain testing position
Elastic modulus Ei, in above formula, FjFor the every grade of loading force applied to first test specimen, LiFor each first default strain testing
Position is to the distance on the first test specimen top, εiFor the answering at each first default strain testing position under every grade of loading force
Become；
According to formulaCalculate the average elastic modulus E of first test specimen under every grade of loading forcej, in above formula, n
For the quantity of the first default strain testing position；
By the average elastic modulus E of first test specimen under loading forces at different levelsjAverage value be defined as the elasticity of first test specimen
Modulus E.
8. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 1, it is characterised in that described to shake
Dynamic platform proof stress calculation procedure further comprises：
Second installs sub-step, and foil gauge is installed on to the second default strain testing position of second test specimen, and by second
Displacement meter is installed on the top of second test specimen；
Second load applies sub-step, applies default earthquake load to second test specimen；
Second determines sub-step, determines the destruction position of second test specimen；
Second Stress calculation sub-step, answering for position is destroyed according to the modulus of elasticity of second test specimen and second test specimen
Become, calculate the stress σ that second test specimen destroys positionE；
Displacement determines sub-step, and the top displacement of second test specimen is determined according to the second displacement meter.
9. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 8, it is characterised in that described
Two determine in sub-step,
If the second test specimen damage, the position where the second nearest default strain testing position of distance destruction position is determined
Position is destroyed for second test specimen；
If second test specimen is not damaged, the destruction position of the first test specimen described in whole post bending resistance failure test is defined as described
The destruction position of second test specimen.
10. pillar class composite electrical equipment vibration prevention appraisal procedure according to claim 8, it is characterised in that described
In second Stress calculation sub-step,
According to formula σE=E εECalculate the stress σ that second test specimen destroys positionE, in above formula, E is the bullet of second test specimen
Property modulus, εEThe strain at position is destroyed for second test specimen.
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