CN109827900A - A method of it establishing temperature cycles and alternating load recycles dynamic test loading spectrum - Google Patents
A method of it establishing temperature cycles and alternating load recycles dynamic test loading spectrum Download PDFInfo
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Abstract
The invention discloses a kind of methods for establishing temperature cycles and alternating load circulation dynamic test loading spectrum, comprising the following steps: step 1, temperature cycles compose solution formulation；Step 2, alternating load compose solution formulation；Step 3, bonding test specimen strengthen degradation loading spectrum.The present invention is according to military wide high-speed rail running route and route institute by region, for actual motion environment temperature of the CRH3 type high-speed EMUs on military wide high-speed rail route, the temperature cycles spectrum for formulating information display window carrys out analog information display window bonded structure to be influenced by environment temperature, is strengthened degradation for the laboratory that later period bonding test specimen temperature cycles and negative pressure alternating load couple and is established preliminary temperature cycles loading scheme.
Description
Technical field
The invention belongs to railway arts, specifically, being related to a kind of establishing temperature cycles and alternating load circulation is dynamic
The method of state test load spectrum.
Background technique
With the integrative development of world economy, China increases investment bullet train system development dynamics, promotes economic hair
Zhan Li develops beat with previous generation fruit, but from the point of view of fact, because China's EMU runing time is relatively short, some technical matters
It still remains.Since difference variation range suffered in high-speed EMUs throughout the year north and south operational process is bigger, and vehicle
Different variation of ambient temperature can be met with during operation, therefore when carrying out prediction of strength to high-speed EMUs bonded structure,
Need to fully consider influence of the temperature change to adhesive property.
Summary of the invention
It is an object of the invention to propose a kind of to establish temperature cycles and alternating load circulation dynamic test loading spectrum
Method.This method is directed to actual motion environment of the high-speed EMUs on typical running route, establishes preliminary temperature cycles and adds
Load scheme；The quantity of bus stop and the quantity of crossing-river tunnel are counted, determines preliminary information display window negative-pressure cyclic alternating load
Characteristic；Information display window negative-pressure cyclic Loaded contact analysis is simplified, information display window temperature cycles is tentatively established and negative pressure is handed over
Strengthen degradation loading spectrum in the laboratory of varying load circulation coupling；Specifically research contents includes:
(1) is directed to actual motion environment of the CRH3 type high-speed EMUs in Typical Route, establishes preliminary temperature cycles
Loading scheme；
(2) quantity of the military wide high-speed rail running route bus stop of statistics and the quantity of crossing-river tunnel, according to information display window
It is main to influence operating condition, determine preliminary forms negative-pressure cyclic alternating load characteristic；
(3) simplifies information display window negative-pressure cyclic Loaded contact analysis, tentatively establish information display window temperature cycles and
Strengthen degradation loading spectrum in the laboratory of negative pressure alternating load circulation coupling.
Its technical solution is as follows:
A method of it establishing temperature cycles and alternating load recycles dynamic test loading spectrum, comprising the following steps:
Step 1, temperature cycles compose solution formulation
Running route and route institute for high-speed rail fully consider environment temperature in high-speed EMUs driving process by region
The influence of constant interval and variation of ambient temperature to information display window bonded structure is spent, the operation of CRH3 high-speed EMUs is determined
Range of temperature suffered by information display window bonded structure in section.DIN6701 atmospheric exposure test standard is tentatively referred to, to VWP
The temperature cycles mode and circulation amplitude of 1200 alternation climatic test conditions improve, and foundation meets CRH3 high-speed EMUs
Temperature cycles of the information display window bonded structure in Wu Guanggao railway line compose loading scheme.
Step 2, alternating load compose solution formulation
Running route and route for high-speed rail count CRH3 high-speed EMUs in military wide high-speed rail working line by region
The quantity of middle bus stop and the quantity of crossing-river tunnel, research and analyse information display window bonded structure is influenced by alternating load, is obtained
Obtain the most dangerous work stress of information display window bonded structure.
In conjunction with influence information display window bonded structure most dangerous work stress, the operating condition with reference to as defined in EN12663 standard and
Pneumatic uniform load parameter calculates information display window bonded structure.By the equivalent test load and dangerous work being calculated
Condition action time establishes information display window bonded structure alternating load circulation dynamic test loading spectrum；
Step 3, bonding test specimen strengthen degradation loading spectrum
The temperature cycles spectrum for formulating bonding test specimen, simulates temperature change suffered by high-speed EMUs information display window bonded structure
Influence.The running environment and bus stop quantity, crossing-river tunnel quantity for considering high-speed EMUs typical itineraries, determine preliminary letter
Cease display window negative-pressure cyclic alternating load spectrum.Temperature cycles spectrum and negative-pressure cyclic alternating load are composed into simultaneous, it is preliminary to establish bonding
Degradation loading spectrum is strengthened in the laboratory of test specimen temperature cycles and the circulation coupling of negative pressure alternating load.Comprehensively consider alternating load
Compose circulation maximum cycle and the atmospheric exposure test period, determine 0 between maximum cycle experimental group number N and every group
Test cycle number Q1、Q2、···、QN.According to reinforcing degradation loading spectrum to Sikaflex-265 bonding agent anode plate base
Material bonding test specimen carries out strengthening coupling aging at loading test, establish Sikaflex-265 bonding agent residual intensity and cycle-index it
Between relation curve, the ageing failure behavior of analog information display window bonded structure.
The invention has the benefit that
The present invention, by region, fully considers high speed motor car for CRH3 high-speed EMUs typical case running route and route
The influence of group running environment temperature range and variation of ambient temperature to information display window bonded structure, in conjunction with high speed motor car group information
The variation range of temperature suffered by display window tentatively refers to DIN6701 atmospheric exposure test standard, to 1200 alternation climatic test of VWP
The temperature cycles curve endless form and circulation amplitude of condition improve, and foundation meets CRH3 high-speed EMUs information display window
The temperature cycles of bonded structure compose loading scheme.
According to military wide high-speed rail running route and route institute by region, for CRH3 type high-speed EMUs in Wu Guanggao iron wire
The actual motion environment temperature of road, the temperature cycles spectrum for formulating information display window carry out analog information display window bonded structure by ring
Degradation foundation is strengthened in the influence of border temperature, the laboratory for being bonded test specimen temperature cycles and the coupling of negative pressure alternating load for the later period
Preliminary temperature cycles loading scheme.
Detailed description of the invention
Fig. 1 is military wide high-speed rail line map；
Fig. 2 is 1200 alternation climatic test condition of VWP；
Fig. 3 is temperature cycles spectrum loading scheme；
Fig. 4 is tunnel operating condition information display window bonded structure alternating load spectrum；
Fig. 5 is temperature cycles spectrum loading scheme；
Fig. 6 is tunnel operating condition information display window bonded structure alternating load spectrum；
Fig. 7 is the laboratory reinforcing degradation load of information display window temperature cycles and the circulation coupling of negative pressure alternating load
Spectrum；
Fig. 8 is bonding test specimen alternating load circulation dynamic test loading spectrum；
Fig. 9 is that bonding test specimen strengthens degradation loading spectrum.
Specific embodiment
Technical solution of the present invention is described in more detail with reference to the accompanying drawings and detailed description.
1 temperature cycles compose solution formulation
1.1 research purpose
Study the temperature cycles side in CRH3 high-speed EMUs information display window bonded structure life-span prediction method in this part
The formulation of case.Since difference variation range suffered in high-speed EMUs throughout the year north and south operational process is bigger, and vehicle
Different variation of ambient temperature can be met with during operation, therefore when carrying out prediction of strength to high-speed EMUs bonded structure,
Need to fully consider influence of the temperature change to adhesive property.By formulating temperature cycles spectrum to high-speed EMUs information display window
Bonded structure carries out laboratory simulation environmental temperature experiment, researchs and analyses variation of ambient temperature to information display window bonded structure
Changing rule of the bonded structure under environment temperature cycling condition is investigated in the influence of energy.
Extensively high-speed rail running route and route institute are by region according to force for this programme, for CRH3 type high-speed EMUs military wide
Actual motion environment temperature on high-speed rail route, the temperature cycles spectrum for formulating information display window carry out analog information display window bonding knot
Structure is influenced by environment temperature, and aging examination is strengthened in the laboratory for being bonded test specimen temperature cycles and the coupling of negative pressure alternating load for the later period
It tests and establishes preliminary temperature cycles loading scheme.
1.2 research method
Running route and route institute for military wide high-speed rail fully consider high-speed EMUs driving process middle ring by region
The influence of border temperature change section and variation of ambient temperature to information display window bonded structure, determines CRH3 high-speed EMUs
Range of temperature suffered by information display window bonded structure in traffic coverage.DIN6701 atmospheric exposure test standard is tentatively referred to, it is right
The temperature cycles mode and circulation amplitude of 1200 alternation climatic test condition of VWP improve, and foundation meets CRH3 high speed motor car
Temperature cycles of the group information display window bonded structure in Wu Guanggao railway line compose loading scheme.
1.3 research contents
1.3.1 military wide high-speed rail brief introduction and line parameter circuit value
Military wide high-speed rail is the southern section (Wuhan --- Guangzhou Section) of the wide high-speed rail in capital, north and south domestic positioned at Hubei, Hunan and Guangdong
Trend, about 1068.8 kilometers of overall length, 989 kilometers of positive line length, overall trip speed target value is 350 kilometers/hour, and military wide high-speed rail is
Overall trip speed most one of fast, the maximum high-speed railway of density in the world.Military wide high-speed rail, to southern running route, starts from Wuhan by north
Wuhan Railway Station, by Xianning, Chibi, Yueyang, Changsha, Zhuzhou, Heng Shan, Hengyang, Leiyang, Chenzhou, Lechang, Shaoguan, Germany and Britain, Qingyuan City,
Huadu, reaches Guangzhou south railway station, and military wide high-speed rail route is as shown in Figure 1.
1.3.2 it is composed based on DIN6701 weatherability standard formulation temperature cycles
1) temperature cycles compose variation range
According to military wide high-speed rail line map and route institute by region, with reference to the thermograph in former years, summer external environment is most
High temperature can reach 50 DEG C, and winter minimum temperature can reach -10 DEG C.Between the CRH3 high-speed EMUs vehicle runtime, body construction
It is exposed under ambient temperature, information display window bonded structure is easy by ambient temperature effect.Summer information display window is viscous
Binding structure maximum temperature will be much higher than the external environment highest temperature, and the winter information display window bonded structure lowest temperature will be lower than
The external environment lowest temperature.
In order to investigate influence of the temperature cycles to high-speed EMUs information display window bonded structure performance, temperature cycles spectrum is answered
It is formulated according to information display window most dangerous work temperature range.With reference to the temperature of DIN6701 weatherability standard formulation information display window
Cyclic Spectrum is spent, range of DO as defined in DIN6701 standard is not to be exceeded in temperature cycle range, defines the letter of CRH3 high-speed EMUs
Ceasing display window bonded structure temperature cycles spectrum variation range is -20 DEG C to 80 DEG C.
2) temperature cycles compose loading scheme
According to 1200 alternation climatic test condition of VWP, as shown in Fig. 2, alternation climatic test conditionary periodic is 12h, temperature
Variation range is -40 DEG C to 80 DEG C, and range of humidity variation is 30% to 80%.Due to being carried out on the outside of bonding glue-line using sealant
Sealing does not consider that humidity is bonded information display window so influence of the humidity to glue-line can be ignored substantially in this project research
The influence of structural life-time, therefore the relative humidity for being 50% by humidity set in experimentation.
The variation range of the temperature in conjunction with suffered by high-speed EMUs information display window tentatively refers to DIN6701 atmospheric exposure test
Standard, endless form and circulation amplitude to DIN6701 atmospheric exposure test normal temperature cyclic curve improve.According to information
The variation range of display window bonded structure temperature cycles spectrum and the foundation of 1200 alternation climatic test condition of VWP meet CRH3 high speed
Temperature cycles of the EMU information display window bonded structure on Wu Guanggao iron wire compose loading scheme, as shown in Figure 3.
3) temperature cycles spectrum load process
A series of bonding test specimen analog information display window bonded structures are processed first, will be glued by ancillary test loading device
It connects test specimen and is packed into the chamber of high/low temperature hygrothermal environment.Before on-test, by air in case be adjusted to room temperature (i.e. 23 DEG C) and
50% relative humidity.It keeps high/low temperature hygrothermal environment chamber relative humidity constant, is composed according to temperature cycles and load process, one
A period continues 720min (12 hours), and temperature curve circulation process table is as shown in table 1.
1 temperature cycles flow table of table
| Periodic phase | Period (min) | Range of temperature |
| Heat up phase | 0-60 | From+23 DEG C to+80 DEG C |
| Retention time | 60-300 | Remain+80 DEG C |
| Cool down phase | 300-420 | From+80 DEG C to -20 DEG C |
| Retention time | 420-660 | Remain -20 DEG C |
| Heat up phase | 660-720 | From -20 DEG C to+23 DEG C |
2 alternating loads compose solution formulation
2.1 research purpose
Study alternating load scheme in CRH3 high-speed EMUs information display window bonded structure life-span prediction method in this part
Formulation.The running environment of high-speed EMUs is more complicated, aobvious to information in the different operating conditions such as bus stop and crossing-river tunnel
Show that window generates internal and external pressure difference, causes bonded structure by the effect of dynamic alternating load.
The running environment and bus stop quantity, crossing-river tunnel quantity for considering high-speed EMUs typical itineraries, according to most dangerous
Working stress determines preliminary information display window negative-pressure cyclic alternating load spectrum, is the bonding test specimen temperature cycles in later period and negative
Strengthen degradation and establish preliminary negative pressure alternating load CYCLIC LOADING scheme in the laboratory of pressure alternating load coupling.
2.2 research method
Running route and route for military wide high-speed rail count CRH3 high-speed EMUs and run in military wide high-speed rail by region
The quantity of bus stop and the quantity of crossing-river tunnel in route, research and analyse information display window bonded structure by the shadow of alternating load
It rings, obtains the most dangerous work stress of information display window bonded structure.
In conjunction with influence information display window bonded structure most dangerous work stress, the operating condition with reference to as defined in EN12663 standard and
Pneumatic uniform load parameter calculates information display window bonded structure.By the equivalent test load and dangerous work being calculated
Condition action time establishes information display window bonded structure alternating load circulation dynamic test loading spectrum.
2.3 research contents
2.3.1 military wide high-speed rail line parameter circuit value
According to Guangzhou Railway Corporation's introduction, military wide high-speed rail originates Wuhan to Guangzhou, and about 1068.8 kilometers of overall length, overall trip speed target value
It is 350 kilometers/hour, high-speed rail station sum is 16, and total 388 kilometers of main track roadbed, the line is busy the 40.1% of road overall length.To have
The cultivated land resource of effect protection Along Railway preciousness, military wide high-speed rail use the side of interface height as far as possible during planning and designing
Formula.579.549 kilometers of all fronts bridge tunnel overall length, accounts for the 59.9% of line length.661 401.239 kilometers of bridge is wherein shared, is accounted for
The 41.4% of path length；237 178.858 kilometers of tunnel, accounts for the 18.5% of line length.
2.3.2 information display window alternating load Cyclic Spectrum
By statistical analysis, crossed tunnel quantity is aobvious drawing information much larger than high-speed rail station sum in military wide high-speed rail route
Show window alternating load time spectrum, in order to simplify alternating load load process, should follow most beneficial for the principle for shortening the test period, it can
To ignore the negative pressure load of information display window when high-speed EMUs bus stop operating condition, high-speed EMUs crossing-river tunnel need to be only considered
The negative pressure load variation of information display window bonded structure when operating condition.
Military wide high-speed rail completely shares 237 178.858 kilometers of tunnel, and the high-speed EMUs speed of service is 350 kilometers/it is small
When, it calculates averagely through a tunnel required time are as follows:
(178.858 ÷, 237 ÷ 350) × 3600=7.76s ≈ 8s
It is mainly derived from tunnel operating condition by negative pressure load according to information display window bonded structure, it is aobvious to high speed motor car group information
Show that window bonded structure establishes alternating load spectrum.Tunnel operating condition is defined referring to EN12663 " rail facility-railway vehicle body knot
Structure requirement " related content, it then follows information window bonded adhesives ply stress size caused by test load is consistent with actual working stress
Principle.
According to the main force-bearing situation of information display window bonded structure in high-speed EMUs operational process, high-speed EMUs is worn
More tunnel when, information display window will receive the outside negative pressure uniform load of vertical forms.Finite element fraction is established to information display window
Model is analysed, operating condition most dangerous pneumatic uniform load in high-speed EMUs tunnel is 6000pa, and information display window bonded structure calculates
It is calculated according to operating condition as defined in EN12663 standard and pneumatic uniform load.
The pneumatic uniform load of information display window bonded structure is 0 when setting high-speed EMU drives at a constant speed, when into tunnel, gas
Dynamic uniform load is raised to 6000pa from 0pa within 2s action time, and the tunnel operating condition continuous action time is 8s, out when tunnel, gas
Dynamic uniform load drops to 0pa from 6000pa within 2s action time.Establish tunnel operating condition information display window bonded structure alternating download
Lotus spectrum, as shown in Figure 4.
3 bonding test specimens strengthen degradation loading spectrum
3.1 research purpose
Temperature cycles spectrum and alternating load spectrum, this part based on formulation study and define bonding test specimen temperature cycles and negative pressure
Strengthen degradation loading spectrum in the laboratory of alternating load circulation coupling.By to high-speed EMUs information display window negative pressure alternation
Load cycle Loaded contact analysis is simplified, combination temperature Cyclic Spectrum, and temperature cycles and alternating load, which are recycled two kinds of variables, to be influenced
Degradation load is strengthened in factor coupling, the laboratory for establishing bonding test specimen temperature cycles and the circulation coupling of negative pressure alternating load
Spectrum.
3.2 research method
The temperature cycles spectrum for formulating bonding test specimen, simulates temperature change suffered by high-speed EMUs information display window bonded structure
Influence.The running environment and bus stop quantity, crossing-river tunnel quantity for considering high-speed EMUs typical itineraries, determine preliminary letter
Cease display window negative-pressure cyclic alternating load spectrum.Temperature cycles spectrum and negative-pressure cyclic alternating load are composed into simultaneous, it is preliminary to establish bonding
Degradation loading spectrum is strengthened in the laboratory of test specimen temperature cycles and the circulation coupling of negative pressure alternating load.Comprehensively consider alternating load
Compose circulation maximum cycle and the atmospheric exposure test period, determine 0 between maximum cycle experimental group number N and every group
Test cycle number Q1、Q2、···、QN.According to reinforcing degradation loading spectrum to Sikaflex-265 bonding agent anode plate base
Material bonding test specimen carries out strengthening coupling aging at loading test, establish Sikaflex-265 bonding agent residual intensity and cycle-index it
Between relation curve, the ageing failure behavior of analog information display window bonded structure.
3.3 research contents
According to the variation range and VWP 1200 of the information display window bonded structure temperature cycles of CRH3 high-speed EMUs spectrum
Alternation climatic test condition is established temperature of the CRH3 high-speed EMUs information display window bonded structure on military wide high-speed rail route and is followed
Ring composes loading scheme, as shown in Figure 5.
According to the main force-bearing situation of information display window bonded structure in high-speed EMUs operational process, high-speed EMUs is worn
More tunnel when, information display window will receive the outside negative pressure uniform load of vertical forms.High-speed EMUs tunnel operating condition is most dangerous
Pneumatic uniform load be 6000pa, information display window bonded structure is calculated according to operating condition as defined in EN12663 standard and pneumatic
Uniform load is calculated, and establishes simplified tunnel operating condition information display window bonded structure alternating load spectrum, as shown in Figure 6.
It is composed according to tunnel operating condition information display window bonded structure alternating load, with reference to CRH3 high-speed EMUs information display window
Temperature cycles of the bonded structure on military wide high-speed rail route compose loading scheme, tentatively establish information display window temperature cycles and negative pressure
Degradation loading spectrum is strengthened in the laboratory of alternating load circulation coupling, as shown in Figure 7.Wherein temperature cycles spectrum cycle period is
12h, negative pressure alternating load cycle period are 12s, and temperature cycles compose 1 period negative pressure alternating load of every circulation and recycled for 3600 periods.
The glue-line most dangerous work stress as obtained by calculating, Extrapolation obtain the alternating load amplitude of bonding test specimen；Base
In alternating load amplitude, temperature cycles are established to bonding test specimen and negative pressure alternating load recycles coupling test loading spectrum.
The negative pressure load variation for considering information display window when high-speed EMUs crossing-river tunnel operating condition, by being applied to bonding examination
Part directed force F analog information display window bonded structure stress condition establishes bonding test specimen alternating load spectrum.Reference information display window
Strengthen degradation loading spectrum, establishes the temperature cycles for meeting CRH3 high-speed EMUs information display window on military wide high-speed rail route
Strengthen degradation loading spectrum with the laboratory of negative pressure alternating load circulation coupling.
The Loaded contact analysis of test specimen is bonded according to information display window bonded structure Cyclic Stress waveform Extrapolation, by sandhog
The pneumatic uniform load 6000pa of condition brings information display window finite element model into as working condition, and bonded structure glue-line is calculated
Most dangerous work stress σ.Based on gained glue-line most dangerous work stress σ is calculated, Extrapolation obtains the alternating download of bonding test specimen
Lotus amplitude.
Sikaflex-265 cement docking bonding test specimen is designed, most dangerous work stress suffered by bonded structure glue-line is passed through
σ, Extrapolation show that needs are applied to the alternating load amplitude F of bonding test specimen, are provided by formula (1), wherein A is the bonding of glue-line
Area.
It is bonded glue-line sandhog condition stress distribution cloud atlas according to information display window, can must be bonded glue-line maximum stress σ is
0.52Mpa.Design Sikaflex-265 cement docking bonding test specimen, bonding side length takes 25mm, bond area A be 25mm ×
25mm=625mm2.The alternating load amplitude F for acquiring bonding test specimen, is provided by formula (2), viscous by bonding test specimen analog information window
Binding structure stress condition.
F=σ × A=0.52Mpa × 625mm2=325N ... ... ... (2)
Alternating load is applied to bonding test specimen using hydraulic cylinder, in order to avoid generating punching to bonding test specimen when hydraulic cylinder load
It hits, needs to set suitable loading speed and load time.According to bonding test specimen active force and action time, setting is loaded and is unloaded
Carrying the time is all 2s, and loading speed is v=F/2 (N/s).Information display window tunnel operating condition action time is 8s, draws one and follows
The bonding test specimen alternating load in ring period recycles dynamic test loading spectrum, and circulation time 12s, alternating load Cyclic Spectrum is such as
Shown in Fig. 8.
Dynamic test loading spectrum is recycled in conjunction with bonding test specimen temperature cycles spectrum and alternating load, by temperature and alternating load two
Kind variable influence factor coupling strengthens degradation loading spectrum according to information display window, and the temperature that foundation meets bonding test specimen is followed
Degradation loading spectrum is strengthened in the laboratory of ring and the circulation coupling of negative pressure alternating load, and bonding test specimen strengthens degradation loading spectrum
As shown in Figure 9.Wherein temperature cycles spectrum cycle period is 12h, and it is 12s that alternating load, which composes cycle period, and temperature cycles spectrum is often followed
Ring 1 period alternating load spectrum 3600 periods of circulation.
According to the maximum cycle of Dynamic Load Spectrum circulation, 0 to the experimental group number N of maximum cycle and every group are determined
Test cycle number Q1、Q2、···、QN.According to the test cycle group number N of Dynamic Load Spectrum, determination needs to be bonded N group test specimen,
Defining every group of bonding test specimen is R1、R2、···、RN, every group includes M bonding test specimen.Strengthen degradation according to bonding test specimen
Loading spectrum respectively carries out N group bonding test specimen different.
The foregoing is only a preferred embodiment of the present invention, the scope of protection of the present invention is not limited to this, it is any ripe
Know those skilled in the art within the technical scope of the present disclosure, the letter for the technical solution that can be become apparent to
Altered or equivalence replacement are fallen within the protection scope of the present invention.
Claims (2)
1. a kind of method for establishing temperature cycles and alternating load circulation dynamic test loading spectrum, it is characterised in that；
Step 1, temperature cycles compose solution formulation
Running route and route institute for high-speed rail fully consider that environment temperature becomes in high-speed EMUs driving process by region
Change the influence of section and variation of ambient temperature to information display window bonded structure, determines CRH3 high-speed EMUs traffic coverage
Range of temperature suffered by interior information display window bonded structure；DIN6701 atmospheric exposure test standard is tentatively referred to, to VWP 1200
The temperature cycles mode and circulation amplitude of alternation climatic test condition improve, and it is aobvious that foundation meets CRH3 high speed motor car group information
Show temperature cycles spectrum loading scheme of the window bonded structure in high railway line；
Step 2, alternating load compose solution formulation
Running route and route for high-speed rail count CRH3 high-speed EMUs and stop in military wide high-speed rail working line by region
The quantity of the quantity and crossing-river tunnel that pull in, research and analyse information display window bonded structure is influenced by alternating load, is believed
Cease the most dangerous work stress of display window bonded structure；
In conjunction with influencing information display window bonded structure most dangerous work stress, the operating condition with reference to as defined in EN12663 standard and pneumatic
Uniform load parameter calculates information display window bonded structure；Made by the equivalent test load and dangerous working condition that are calculated
With the time, information display window bonded structure alternating load circulation dynamic test loading spectrum is established；
Step 3, bonding test specimen strengthen degradation loading spectrum.
2. the method according to claim 1 for establishing temperature cycles and alternating load circulation dynamic test loading spectrum, special
Sign is, step 3 specifically: the temperature cycles spectrum for formulating bonding test specimen simulates high-speed EMUs information display window bonded structure
It is acted upon by temperature changes；Consider the running environment and bus stop quantity, crossing-river tunnel quantity of high-speed EMUs typical itineraries,
Determine preliminary information display window negative-pressure cyclic alternating load spectrum；Temperature cycles spectrum and negative-pressure cyclic alternating load are composed into simultaneous,
Degradation loading spectrum is strengthened in the laboratory of preliminary foundation bonding test specimen temperature cycles and the circulation coupling of negative pressure alternating load；It is comprehensive
It in maximum cycle and the atmospheric exposure test period for considering alternating load spectrum circulation, determines 0 to the examination between maximum cycle
Test group number N and every group of test cycle number Q1、Q2、···、QN；According to reinforcing degradation loading spectrum to Sikaflex-265
Bonding agent anode plate substrate bonding test specimen carries out strengthening coupling aging at loading test, and it is remaining strong to establish Sikaflex-265 bonding agent
Relation curve between degree and cycle-index, the ageing failure behavior of analog information display window bonded structure.
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| CN201910147059.6A Pending CN109827900A (en) | 2019-02-27 | 2019-02-27 | A method of it establishing temperature cycles and alternating load recycles dynamic test loading spectrum |
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Cited By (1)
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| CN112213442A (en) * | 2019-07-11 | 2021-01-12 | 中车唐山机车车辆有限公司 | Adhesion structure aging evaluation method, terminal device and storage medium |
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| CN112213442B (en) * | 2019-07-11 | 2022-11-01 | 中车唐山机车车辆有限公司 | Adhesive structure aging evaluation method, terminal device and storage medium |
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