基于多体动力学的地铁列车吸能量设计

摘要

地铁列车的吸能参数配置合理是保证地铁列车耐撞击性能的根本因素,为提高地铁列车的耐撞击性能,优化设计地铁列车头车及中间车吸收能量,以多体动力学软件MADYMO为平台建立地铁列车一维碰撞计算模型,利用REGRESS函数对计算结果进行拟合,并分析相关因素对地铁列车吸收能量的影响.研究结果表明:通过研究列车单车质量、编组、压溃管塑变平台力对地铁列车吸收能量的影响,得到地铁列车头车吸收能量拟合关系式为W=0.1162 α Mv2?0.1 F,该拟合关系式精度可达98.99%,中间车吸收能量的拟合关系式为W=5.296×10?4α Mv2+0.0383 F,该拟合关系式精度可达94.42%,以上关系式可为地铁列车吸能参数配置提供理论支持,可应用于地铁列车吸能装置的设计过程中.%Subway train energy absorption parameters are reasonable to ensure that the subway train impact resistance performance of the fundamental factors. In order to improve crashworthiness and optimize the energy absorption of metro train head and middle car, an one-dimensional computational model for locomotive vehicles was built in MADYMO multibody dynamics software. The results of calculations using the model were then fitted by multiple linear-regression functions and the influence of relevant factors on the energy absorption of subway train was analyzed. The results show that by studying the influence of the single train mass, the marshalling and the crushing force on the suction energy of the subway train, the energy fitting formula of the subway train head car is obtained as W=0.116 2 αM ν2?0.1 F and the fitting accuracy of the model is 98.99%. The energy fitting formula of the2001016rn subway train middle car is obtained as W=5.926*10?4αM ν2+0.038 3 F,and the fitting accuracy of the model is 94.42%. The above relationship can provide theoretical support for the allocation of energy parameters of subway train, which can be applied to the design process of subway train energy absorp.