Compilation and verification of fatigue load spectrum for sliding groove of high-speed train bottom equipment in service environment
With the development of multiple unit trains at higher speed,the pursuit of lightweight level is more and more urgent.In the existing multiple unit trains platform,for the vehicle body without crossbeam chassis,changing the chassis slipway suspension can significantly reduce the mass and volume of the equipment frame,and thus realize the purpose of lightweight.However,the fatigue strength performance of the structure is the most concern for the chassis suspension.In order to understand the fatigue performance,based on the vibration acceleration of the under-vehicle equipment of the multiple unit trains in service,combined with the established standard system,the combination of working conditions and load extrapolation method was adopted in the full cycle of service,and based on the principle of cumulative damage and the acceleration method of fatigue test,the equivalent vibration amplitude at the number of cycles of 107 times was complied,and the fatigue strength tests of the slide groove structure were carried out.The results show that compared with the existing standard system,the vertical load of under-vehicle equipment considering service environment is less than the standard value,and the transverse and longitudinal load is more than the standard value;the structure of large mass under-vehicle equipment of lightweight high-speed rolling stock can meet the requirements of 30 years design life when the sliding groove hanging method is used.
electric multiple units(EMU)lightweightchutesload spectrumfatigue test
国家科技期刊平台
NSTL
万方数据
