高速动车组车下蓄电池箱构架疲劳载荷谱研究

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中图分类号：U270.2 文献标志码：B doi：10.20213/j.cnki.tdcl.2024.10.23.02

Abstract：With the continuous increasing of the running speed and lightweight requirements of high-speed EMUs in China，the anti-fatigue ability of the underframe equipments is stilla great challenge. In this paper， thefatigue loading spectra are studied based on the battery box frame under an EMU. With the field tests，it is found that the main frequency of the vibration acceleration and dynamic stress of the frame is in the range of 8 ～22Hz ，and it could be inferred that the resonance happens to the frame，which will lead to higher dynamic stressThe vibration characteristics of the batery box frame and the bolster are compared with the IEC 61373： 2010 standard loading spectra，and it is found that vibrational amplitude of the frame and the bolster are partially over IEC 61373 standard，and the vertical ASDof the bolster exceeds the standard limits when the train speed is above 350km/h . It could be deduced that the limits in IEC 61373 may be appropriate at the train speeds below 350km/h ，but if the speed is higher，it is necessary to re-evaluate whether the limits of the standard are safe or not.Finally，the following suggestions are proposed： modify the coverage range of lowfrequencyand high-frequency load spectra in existing standards，and classify the load spectra based on train operating speed；establish a standardized design process for dynamic simulation and emulation；systematic collction and analysis of line excitation load data should be planned，anda high-speed train load spectrum standard system is ultimately formed to meet the operating requirements in China.

Key words： high-speed EMU;fatigue;loading spectra; battery box frame;bolster; IEC 61373

由于采用动力分散安装方式，高速动车组大量电气、制动等设备安装在车体下部，列车在长时间运营过程中受到随机激扰，易造成各种承载结构的疲劳损伤，同时随着动车组运营速度和轻量化设计要求的不断提高，这种风险会进一步加剧。（剩余13132字）