CN109918854A - A kind of composite insulation cross arm endurance quality appraisal procedure and device - Google Patents
A kind of composite insulation cross arm endurance quality appraisal procedure and device Download PDFInfo
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Abstract
The invention discloses a kind of composite insulation cross arm endurance quality appraisal procedure and devices, and to compound cross-arm, stress response carries out finite element analysis under dead load effect, finds the crucial section for being used for durable assessment；For three crucial load factors for influencing compound cross-arm military service durability, i.e. broken string load, conductor galloping and aeolian vibration is assessed using different assessment strategies；For the operating condition that breaks, broken string load is applied to cross-arm, obtains the dynamic stress response in crucial section, impact coefficient is calculated and assesses safety；The standard load block waved with aeolian vibration is chosen, dynamic analysis is then carried out for the cross-arm under conductor galloping and aeolian vibration effect, the dynamic stress response in crucial section is obtained, carries out Fatigue Life Assessment.The present invention can assess endurance quality of the cross-arm under a variety of load collective effects, can also reflect the nonlinear development process of damage, accurately more reliable than conventional estimated method.
Description
Technical field
The invention belongs to power domain more particularly to a kind of composite insulation cross arm endurance quality appraisal procedure and devices.
Background technique
Resin and glass fibre class composite material have many advantages, such as in terms of electrical and mechanical properties, at present compound inslation
It is a trend that cross-arm shaft tower, which replaces all steel shaft tower,.
It is domestic at present that mainly composite material cross arm is applied in 220kV and the lower transmission line of electricity of following voltage class,
It is designed using the strength of materials method of static load and Security Checking；But the extra high voltage network of 500kV or more is answered
With less, main cause is that the requirement of the safety of ultra-high-tension power transmission line, durability and long-term reliability is higher.Hinder compound cross
Carry on a shoulder pole to high kilovoltage transmission line of electricity apply major obstacle be a lack of compound cross-arm is chronically at operation load action under it is durable
With the estimation and corresponding design method of fatigue.The safety of compound cross-arm is calculated and is only set in statics and intensity with assessment
Count level, power shortage and durable design method.
Summary of the invention
Goal of the invention: in view of the above problems, the present invention proposes a kind of composite insulation cross arm endurance quality appraisal procedure and dress
It sets, is estimated for the fatigue durability to composite insulation cross arm.
Technical solution: to achieve the purpose of the present invention, the technical scheme adopted by the invention is that: a kind of composite insulation cross arm
Endurance quality appraisal procedure, comprising steps of
(1) finite element analysis is carried out to stress response of the composite insulation cross arm under dead load effect, found for durable
The crucial section of Performance Evaluation；
(2) key factor for influencing composite insulation cross arm endurance quality is assessed using different strategies；
Broken string load is applied to cross-arm, the dynamic stress response in crucial section is obtained, calculates impact coefficient, for assessing peace
Quan Xing；
The standard load block waved with aeolian vibration is chosen, the cross-arm under conductor galloping and aeolian vibration effect is moved
Mechanical analysis obtains the dynamic stress response in crucial section, carries out Fatigue Life Assessment.
Further, the factor for influencing composite insulation cross arm military service durability includes broken string load, conductor galloping and gentle breeze
Vibration.
Further, the step 1 specifically includes:
(1.1) finite element model of composite insulation cross arm is established；
(1.2) conductor load and wind load are applied separately on the finite element model of composite insulation cross arm, carry out numerical value
It calculates, obtains the Bending moment distribution figure of cross-arm；
(1.3) according to Bending moment distribution figure, the crucial section of moment of flexure maximum or secondary big interface as durable assessment is selected.
Further, in the step 2, to broken string load assessment, specifically include:
(2.1) load under transmission line icing operating condition is selected；
(2.2) broken string process is simulated using the method for TRANSIENT DYNAMIC ANALYSIS；
(2.3) the stress time course data on crucial section is extracted, impact when tower wire body system breaks to cross-arm is calculated
Coefficient；
(2.4) size for assessing impact coefficient, considers whether the design for needing to modify cross-arm.
Further, the impact coefficient are as follows:
In formula, MmThe maximum value that the stress time-histories in the cross-arm key section under broken string operating condition occurs, M are tied up to for tower wire body0For
Tower wire body ties up to the stress value in crucial section under normal operation.
Further, in the step 2, assessment to conductor galloping and aeolian vibration is specifically included:
(3.1) the time span Δ T of standard load block is determined；
(3.2) active force of the conducting wire to cross-arm when calculating conductor galloping or aeolian vibration；
(3.3) active force for obtaining abovementioned steps is applied on the finite element model of composite insulation cross arm, using power
The method of analysis calculates the dynamic response time-histories in crucial section；
(3.4) dynamic response time course data is pre-processed to obtain peak valley value sequence, rain stream is carried out to peak valley value sequence
Count to get Cyclic Stress sequence Δ σ；
(3.5) using load loop blocks as base load unit, using crack Propagation theory, crack Propagation is calculated
Rate；
(3.6) discretization crack propagation process calculates cross-arm entire life.
Further, the step (3.5) specifically includes:
(3.5.1) calculates stress intensity factor of crack Δ K:
Wherein, a is compound cross-arm internal fissure length, and F is multiplier factor.
(3.5.2) traverses Cyclic Stress sequence Δ T, calculates the crack propagation under some Cyclic Stress:
dai=C (Δ Ki)m
Wherein, daiFor the extension length of crackle in single cycle, C and m are the damage parameters of compound cross-arm material.
(3.5.3) calculates crack propagation caused by standard load block:
Further, the step (3.6) specifically includes:
The constituency (3.6.1) crack length initial value a0With critical value ac, equidistant discretization section [a0,ac], it is set as K
Subinterval generates a0,a1,...aj,...aKA equidistant crack length, crack extending length are Δ a=(ac-a0)/K；
(3.6.2) traverses a0,a1,...,aj,...aK-1, invocation step (3.5) enables current crack length a=aj, calculate
Crack extending length da under the effect of standard load blockj；
(3.6.3) calculates crackle from ajExpand to aj+1Required load number of blocks:
(3.6.4) substitutes into calculating loop blocks effect sheer pole key section upper stress response and extracts to obtain Cyclic Stress sequence
C is arranged, is calculated using Formula of Fatigue Crack；Calculate loop blocks number Δ N required for crack extending length Δ ai, and
Summation estimated life:
Wherein, Δ KiFor current crack length aiUnder stress intensity factor of crack.
(3.6.5) accumulative summation obtains cross-arm service life L:
Module, broken string load assessment mould are chosen in a kind of composite insulation cross arm endurance quality assessment device, including crucial section
Block and conductor galloping and aeolian vibration evaluation module；
It chooses module and is used to have stress response of the composite insulation cross arm under dead load effect in the key section
Finite element analysis finds the crucial section for endurance quality assessment, and selected crucial cross section information is sent to broken string load
Evaluation module and conductor galloping and aeolian vibration evaluation module；
The broken string load assessment module applies broken string load to cross-arm, obtains the dynamic stress response in crucial section, meter
Impact coefficient is calculated, for assessing safety；
The conductor galloping and aeolian vibration evaluation module choose the standard load block waved with aeolian vibration, wave to conducting wire
Cross-arm under dynamic and aeolian vibration effect carries out dynamic analysis, obtains the dynamic stress response in crucial section, carries out the tired longevity
Life assessment.
The utility model has the advantages that the invention has the following advantages that cross-arm a variety of load collective effects under operating environment can be assessed
Under service life, it is used based on the fatigue life estimation method of micro-crack extension by a variety of load factors under Unified frame
Reason, can reflect the nonlinear process of fatigue damage process, accurately may be used than traditional whole life prediction based on S-N curve
It leans on.
Detailed description of the invention
Fig. 1 is composite insulation cross arm endurance quality appraisal procedure flow chart of the present invention；
Fig. 2 is the direction y load timeamplitude map under broken string operating condition；
Fig. 3 is square tube horizontal type cross-arm root right sided cell maximum cross-section point stress timeamplitude map；
Fig. 4 is to wave the suspension direction tension y load timeamplitude map under operating condition；
Fig. 5 is square tube horizontal type cross-arm root right sided cell maximum cross-section point stress timeamplitude map.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawings and examples.
As shown in Figure 1, composite insulation cross arm endurance quality appraisal procedure of the present invention, comprising steps of
(1) finite element analysis is carried out to stress response of the composite insulation cross arm under dead load effect, found for durable
The crucial section of Performance Evaluation；Specific step is as follows:
(1.1) finite element model of composite insulation cross arm is established；The connection of composite insulation cross arm and electric pole usually may be used
To regard affixed as, the connection of remaining node can be designed as affixed or hinge by the way of node coupling according to the actual situation
It connects, is generally simulated using spatial beam；
(1.2) straight line portion of composite insulation cross arm and diagonal brace part and electric pole use different cross-sectional shapes, assign
Give the different material of each line segment, section and unit；
(1.3) conductor load and wind load are applied separately on the finite element model of composite insulation cross arm, are counted
Value calculates, and obtains the Bending moment distribution figure of cross-arm；According to Bending moment distribution figure, selects moment of flexure maximum or secondary big interface is cut as danger
Face, i.e., the crucial section of durable assessment.
By taking certain square tube horizontal type cross-arm as an example, a kind of situation for selecting load the most unfavorable carries out numerical simulation analysis,
The part moment of flexure that the root two sides and cross-arm that cross-arm is connect with electric pole are connect with diagonal brace is larger, will when wind angle is 45 °
Gravity suffered by conducting wire and wind-force simplification act on cross-arm, are equivalent to and hang lead location application on cross-arm along x, y, z negative sense
Power (x be axial).The bending moment diagram that My, Mz is calculated, cross-arm and electric pole are carried out to the load of normal operation first
The part moment of flexure that the root two sides of connection and cross-arm are connect with diagonal brace is larger, the two sections are chosen for dangerouse cross-section.
(2) for three crucial load factors of influence composite insulation cross arm military service durability, break load, conductor galloping
And aeolian vibration, it is assessed using different assessment strategies.
Assessment to broken string load specifically includes and applies broken string load to cross-arm, and the dynamic stress for obtaining crucial section is rung
It answers, calculate impact coefficient and assesses safety.
The step of working condition safety that breaks is assessed is as follows:
(2.1) for the operating condition that breaks, in the case that broken string typically occurs in transmission line icing, so the simulation meter of broken string operating condition
Calculating the load selected is the load under transmission line icing operating condition；
(2.2) broken string process is simulated using the method for TRANSIENT DYNAMIC ANALYSIS；
In 0s-0.4s, load is remained unchanged to simulate the situation that do not break, and when at 0.4s, load declines suddenly, simulation
Break flashy load suddenly change, and in 0.4s-2s, load is the situation after broken string.To Mr. Yu's square tube horizontal type cross-arm disconnected one
The case where root conducting wire, as shown in Figure 2, it is shown that the direction y load curve under broken string operating condition.
(2.3) the stress time course data on crucial section is extracted, impact when tower wire body system breaks to cross-arm is calculated
Coefficient.
In formula, MmIndicate that tower wire body ties up to the maximum value that the stress time-histories in the cross-arm key section under broken string operating condition occurs, M0
The stress value in crucial section under normal operation is tied up to for tower wire body.
(2.4) size of impact coefficient is assessed.The redundancy of static design intensity is generally 3 or so.If cross-arm short-term
Impact coefficient under operating condition is greater than 2, needs to consider to modify the design of cross-arm, to ensure that cross-arm will not be destroyed in broken string.
Square tube horizontal type under the disconnected unilateral conductive wire scenario of square tube horizontal type cross-arm finite element model is shown as case
Calculated result, cross-arm root right sided cell maximum cross-section point stress time-history curves are as shown in figure 3, dynamic maximum on this element section
Stress is 30.35MPa, increases 1.3 times compared to the maximum stress 24.18MPa on this element under icing operating condition.In this example
In, impact coefficient is still in zone of reasonableness.
Assessment to conductor galloping and aeolian vibration specifically includes the standard load block chosen and waved with aeolian vibration, right
Cross-arm under conductor galloping and aeolian vibration effect carries out dynamic analysis, obtains the dynamic stress response in crucial section, into
Row Fatigue Life Assessment.Steps are as follows:
(3.1) the time span Δ T of standard load block (block) is determined；
The time span of load block with wave or the base frequency of aeolian vibration is related.The frequency of conductor galloping is normally at
0.1~3Hz, under stable vibration state, the time history of general constituency 300 seconds (5 minutes) is as standard load block.Aeolian vibration
Frequency be normally at 3~100Hz, under stable vibration state, the time history in general constituency 3000 seconds (50 minutes) is as mark
Quasi- load loop blocks.
(3.2) active force of the conducting wire to cross-arm when calculating conductor galloping or aeolian vibration；
The course that is, tension of the power transmission line at suspension changes with time.It waves and is mainly led with the mechanism of aeolian vibration
In the case where line especially icing, vibration caused by extraneous wind-force mechanism is received, numerical calculations, method are generally utilized
Mainly there are one degree of freedom modeling, two or Three Degree Of Freedom model, Multi-freedom model and continuous system model, generally uses finite element
It simulates or programs calculating.
As an example, as shown in Figure 4, it is shown that some icing route carries out waving obtained by emulation under wind action
Line stress (direction y) time-histories figure.
(3.3) it establishes the finite element model of cross-arm and applies the suspension tension that abovementioned steps obtain, using kinematic analysis
Method calculates the dynamic response time-histories in crucial section；
As shown in Figure 5, it is shown that after cross-arm enters stable vibration state in the case where waving load action, crucial section cross-arm root
The stress time-histories of portion's right sided cell.
(3.4) stress course data are pre-processed to obtain peak valley value sequence, rain-flow counting is carried out to peak valley value sequence
Cyclic Stress sequence is obtained, Δ σ is denoted asi；
Wherein, Δ σiFor the stress amplitude of some Cyclic Stress, if the Cyclic Stress quantity extracted is M, i can become from 1
Change to M.
(3.5) using load loop blocks as base load unit, using crack Propagation theory, crack Propagation is calculated
Rate.Comprising the following specific steps
(3.5.1) calculates stress intensity factor of crack K:
Wherein, a is compound cross-arm internal fissure length, and F is multiplier factor, is calculated by following formula:
(3.5.2) traverses Cyclic Stress sequence, calculates the crack propagation under some Cyclic Stress:
dai=C (Δ Ki)m
Wherein, daiFor the extension length of crackle in single cycle, C and m are the damage parameters of compound cross-arm material, can be from
Fatigue test obtains, and does not such as make the testing of materials, typical data C=2.1 × 10 of the material may be selected-7And m=2.6.
(3.5.3) calculates crack propagation caused by standard load block, calculation method are as follows:
(3.6) discretization crack propagation process repeats step (3.5) and calculates cross-arm entire life, comprising the following specific steps
The constituency (3.6.1) crack length initial value a0With critical value ac；
Wherein, a0For the typical cross-sectional dimensions of Fiber In Composite Material, typically 10-6The magnitude of m can use a0=10- 6m。acFor the critical crack length that cross-arm destroys, the value generally between the 1/4~1/2 of sectional dimension.
Equidistant discretization section [a0,ac], it is set as K subinterval, then generates a0,a1,...aj,...aKA equidistant crackle
Length.Each siding-to-siding block length, i.e. crack extending length are Δ a=(ac-a0)/K。
(3.6.2) traverses a0,a1,...,aj,...aK-1, invocation step (3.5) enables current crack length a=aj, calculate
Crack extending length da under the effect of standard load blockj, estimate crackle from ajExpand to aj+1Required load number of blocks:
(3.6.3) substitutes into calculating loop blocks effect sheer pole key section upper stress response and extracts to obtain Cyclic Stress sequence
C is arranged, is calculated using Formula of Fatigue Crack.Calculate loop blocks number Δ N required for crack extending length Δ ai, and
Summation estimated life:
Wherein, Δ KiIt is related based on the stress amplitude in cyclic sequence, also with the crack length a under current stateiIt is related.
(3.6.4) accumulative summation obtains cross-arm service life L:
The invention also includes a kind of composite insulation cross arm endurance qualities to assess device, which includes that mould is chosen in crucial section
Block, broken string load assessment module and conductor galloping and aeolian vibration evaluation module.
Wherein, crucial section chooses module and is used to have stress response of the composite insulation cross arm under dead load effect
Finite element analysis finds the crucial section for endurance quality assessment, and selected crucial cross section information is sent to broken string load
Evaluation module and conductor galloping and aeolian vibration evaluation module；The load assessment module that breaks applies broken string load to cross-arm, obtains
The dynamic stress response in crucial section calculates impact coefficient, for assessing safety；Conductor galloping and aeolian vibration evaluation module
The standard load block waved with aeolian vibration is chosen, power credit is carried out to the cross-arm under conductor galloping and aeolian vibration effect
Analysis obtains the dynamic stress response in crucial section, carries out Fatigue Life Assessment.
Compared with prior art, the invention has the following advantages that cross-arm a variety of load works under operating environment can be assessed
Service life under acting on, the used fatigue life estimation method based on micro-crack extension can unite a variety of load factors
It is handled under one frame, can also reflect the nonlinear process of fatigue damage process, than traditional fatigue life based on S-N curve
Estimation is accurately reliable.
Claims (9)
1. a kind of composite insulation cross arm endurance quality appraisal procedure, which is characterized in that comprising steps of
(1) finite element analysis is carried out to stress response of the composite insulation cross arm under dead load effect, finds and is used for endurance quality
The crucial section of assessment；
(2) key factor for influencing composite insulation cross arm endurance quality is assessed using different strategies；
Broken string load is applied to cross-arm, the dynamic stress response in crucial section is obtained, impact coefficient is calculated, for assessing safety
Property；
The standard load block waved with aeolian vibration is chosen, dynamics is carried out to the cross-arm under conductor galloping and aeolian vibration effect
Analysis obtains the dynamic stress response in crucial section, carries out Fatigue Life Assessment.
2. composite insulation cross arm endurance quality appraisal procedure according to claim 1, which is characterized in that influence compound inslation
The factor of cross-arm military service durability includes broken string load, conductor galloping and aeolian vibration.
3. composite insulation cross arm endurance quality appraisal procedure according to claim 1, which is characterized in that step 1 tool
Body includes:
(1.1) finite element model of composite insulation cross arm is established；
(1.2) conductor load and wind load are applied separately on the finite element model of composite insulation cross arm, carry out numerical value calculating,
Obtain the Bending moment distribution figure of cross-arm；
(1.3) according to Bending moment distribution figure, the crucial section of moment of flexure maximum or secondary big interface as durable assessment is selected.
4. composite insulation cross arm endurance quality appraisal procedure according to claim 1, which is characterized in that in the step 2,
Assessment to broken string load, specifically includes:
(2.1) load under transmission line icing operating condition is selected；
(2.2) broken string process is simulated using the method for TRANSIENT DYNAMIC ANALYSIS；
(2.3) the stress time course data on crucial section is extracted, impact coefficient when tower wire body system breaks to cross-arm is calculated；
(2.4) size for assessing impact coefficient, considers whether the design for needing to modify cross-arm.
5. composite insulation cross arm endurance quality appraisal procedure according to claim 4, which is characterized in that the impact coefficient
Are as follows:
In formula, MmThe maximum value that the stress time-histories in the cross-arm key section under broken string operating condition occurs, M are tied up to for tower wire body0For tower line
The stress value in system crucial section under normal operating conditions.
6. composite insulation cross arm endurance quality appraisal procedure according to claim 1, which is characterized in that in the step 2,
Assessment to conductor galloping and aeolian vibration, specifically includes:
(3.1) the time span Δ T of standard load block is determined；
(3.2) active force of the conducting wire to cross-arm when calculating conductor galloping or aeolian vibration；
(3.3) active force for obtaining abovementioned steps is applied on the finite element model of composite insulation cross arm, using kinematic analysis
Method calculate the dynamic response time-histories in crucial section；
(3.4) dynamic response time course data is pre-processed to obtain peak valley value sequence, rain-flow counting is carried out to peak valley value sequence
Obtain Cyclic Stress sequence Δ σ；
(3.5) using load loop blocks as base load unit, using crack Propagation theory, crack Propagation speed is calculated
Rate；
(3.6) discretization crack propagation process calculates cross-arm entire life.
7. composite insulation cross arm endurance quality appraisal procedure according to claim 6, which is characterized in that the step
(3.5) it specifically includes:
(3.5.1) calculates stress intensity factor of crack Δ K:
Wherein, a is compound cross-arm internal fissure length, and F is multiplier factor；
(3.5.2) traverses Cyclic Stress sequence Δ T, calculates the crack propagation under some Cyclic Stress:
dai=C (Δ Ki)m
Wherein, daiFor the extension length of crackle in single cycle, C and m are the damage parameters of compound cross-arm material；
(3.5.3) calculates crack propagation caused by standard load block:
8. composite insulation cross arm endurance quality appraisal procedure according to claim 7, which is characterized in that the step
(3.6) it specifically includes:
The constituency (3.6.1) crack length initial value a0With critical value ac, equidistant discretization section [a0,ac], it is set as K sub-district
Between, generate a0,a1,...aj,...aKA equidistant crack length, crack extending length are Δ a=(ac-a0)/K；
(3.6.2) traverses a0,a1,...,aj,...aK-1, invocation step (3.5) enables current crack length a=aj, calculate standard lotus
Carry the crack extending length da under block effectj；
(3.6.3) calculates crackle from ajExpand to aj+1Required load number of blocks:
(3.6.4) substitutes into calculating loop blocks effect sheer pole key section upper stress response and extracts to obtain Cyclic Stress sequence C,
It is calculated using Formula of Fatigue Crack；Calculate loop blocks number Δ N required for crack extending length Δ ai, and sum
Estimated life:
Wherein, Δ KiFor current crack length aiUnder stress intensity factor of crack；
(3.6.5) accumulative summation obtains cross-arm service life L:
9. a kind of composite insulation cross arm endurance quality assesses device, which is characterized in that choose module, broken string lotus including crucial section
Carry evaluation module and conductor galloping and aeolian vibration evaluation module；
It chooses module and is used to carry out finite element to stress response of the composite insulation cross arm under dead load effect in the key section
Analysis finds the crucial section for endurance quality assessment, and selected crucial cross section information is sent to broken string load assessment
Module and conductor galloping and aeolian vibration evaluation module；
The broken string load assessment module applies broken string load to cross-arm, obtains the dynamic stress response in crucial section, calculates punching
Coefficient is hit, for assessing safety；
The conductor galloping and aeolian vibration evaluation module choose the standard load block waved with aeolian vibration, to conductor galloping and
Cross-arm under aeolian vibration effect carries out dynamic analysis, obtains the dynamic stress response in crucial section, and progress fatigue life comments
Estimate.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455511A (en) * | 2019-08-16 | 2019-11-15 | 国网江苏省电力有限公司电力科学研究院 | Measure the experimental rig and test method of compound cross-arm dynamic response under the operating condition that breaks |
| CN110489914A (en) * | 2019-08-27 | 2019-11-22 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of durability calculation method equivalent based on stress damage |
| CN110991098A (en) * | 2019-10-23 | 2020-04-10 | 国网江苏省电力有限公司电力科学研究院 | High-voltage composite cross arm fatigue life assessment method and system |
| CN114528705A (en) * | 2022-02-18 | 2022-05-24 | 国网湖北省电力有限公司超高压公司 | Fatigue damage estimation method for power transmission line ground wire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293014A (en) * | 2013-05-17 | 2013-09-11 | 东南大学 | Bridge fatigue damage state and residual life evaluating method |
| CN105825030A (en) * | 2016-04-01 | 2016-08-03 | 长沙理工大学 | Fatigue life assessment method for aged reinforced concrete bridge |
| CN106568562A (en) * | 2016-10-19 | 2017-04-19 | 中国电力科学研究院 | Test method and device of power transmission tower cross-arm bolt anti-loosening property |
| CN106644784A (en) * | 2016-12-31 | 2017-05-10 | 北京航空航天大学 | Turbine disc damage tolerance assessment method considering multiple parts and multiple failure modes |
| CN107092735A (en) * | 2017-04-07 | 2017-08-25 | 东南大学 | A kind of bridge fatigue state appraisal procedure |
-
2019
- 2019-04-09 CN CN201910279039.4A patent/CN109918854B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293014A (en) * | 2013-05-17 | 2013-09-11 | 东南大学 | Bridge fatigue damage state and residual life evaluating method |
| CN105825030A (en) * | 2016-04-01 | 2016-08-03 | 长沙理工大学 | Fatigue life assessment method for aged reinforced concrete bridge |
| CN106568562A (en) * | 2016-10-19 | 2017-04-19 | 中国电力科学研究院 | Test method and device of power transmission tower cross-arm bolt anti-loosening property |
| CN106644784A (en) * | 2016-12-31 | 2017-05-10 | 北京航空航天大学 | Turbine disc damage tolerance assessment method considering multiple parts and multiple failure modes |
| CN107092735A (en) * | 2017-04-07 | 2017-08-25 | 东南大学 | A kind of bridge fatigue state appraisal procedure |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455511A (en) * | 2019-08-16 | 2019-11-15 | 国网江苏省电力有限公司电力科学研究院 | Measure the experimental rig and test method of compound cross-arm dynamic response under the operating condition that breaks |
| CN110455511B (en) * | 2019-08-16 | 2022-03-15 | 国网江苏省电力有限公司电力科学研究院 | Test device and test method for measuring dynamic response of composite cross arm under wire breakage working condition |
| CN110489914A (en) * | 2019-08-27 | 2019-11-22 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of durability calculation method equivalent based on stress damage |
| CN110489914B (en) * | 2019-08-27 | 2023-01-17 | 中国航空工业集团公司沈阳飞机设计研究所 | Durability calculation method based on stress damage equivalence |
| CN110991098A (en) * | 2019-10-23 | 2020-04-10 | 国网江苏省电力有限公司电力科学研究院 | High-voltage composite cross arm fatigue life assessment method and system |
| CN110991098B (en) * | 2019-10-23 | 2022-09-09 | 国网江苏省电力有限公司电力科学研究院 | High-voltage composite cross arm fatigue life assessment method and system |
| CN114528705A (en) * | 2022-02-18 | 2022-05-24 | 国网湖北省电力有限公司超高压公司 | Fatigue damage estimation method for power transmission line ground wire |
| CN114528705B (en) * | 2022-02-18 | 2023-03-24 | 国网湖北省电力有限公司超高压公司 | Fatigue damage estimation method for ground wire of power transmission line |
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