基于客车乘员损伤的尖顶等效方波参数研究

doi:10.19562/j.chinasae.qcgc.2019.07.009

摘要/Abstract

摘要： 本文中基于等效方波原理,结合有限元分析方法,研究某12 m客车正面碰撞加速度波形参数与乘员损伤的关系。首先以座椅滑车系统为研究对象,对比3种常用尖顶等效方波(TESW)(上升型、水平型和下降型)的乘员损伤情况。然后,研究下降型TESW回弹时刻参数t_m对乘员综合损伤WIC的影响规律。结果表明:对于12 m客车,下降型TESW优于其他两种等效方波。而在下降波形中,随t_m值增大,WIC呈勺形变化趋势,可拟合成三次回归方程。结合TESW模型简化推导过程可得到WIC最小时刻整车碰撞变形量C与t_m的关系式,为客车结构设计与乘员损伤研究提供参考。

关键词: 客车, 有限元法, 尖顶等效方波, 乘员损伤, 综合损伤评价指标

Abstract: Based on the principle of equivalent square wave and finite element analysis method, the relationship between the acceleration waveform parameters of a 12 m coach and the occupant injury in frontal crash is studied in this paper. Firstly, taking a seat sled system as the object of research, the occupant injuries with three types of commonly used tipped equivalent square waves (TESWs) (rising type, horizontal type and falling type) are compared. Then the effects of the recoil moment parameter t_m in falling TESW on the weighted injury criterion (WIC) of occupant are studied. The results show that for a 12 m coach, the falling TESW is superior to the other two types of TESWs. In falling waveform, with the increase of t_m, the WIC exhibits a spoon-shaped changing pattern, which can be fitted into a cubic regression equation. Combined with the deduction process of simplified TESW model, an expression of the relationship between t_m and the vehicle overall collision deformation C can be obtained, providing references for coach structure design and occupant injury research

Key words: coach, FEM, TESW, occupant injury, WIC

吴长风, 张君媛, 那景新, 苏亮, 蓝平辉, 卢琳兆. 基于客车乘员损伤的尖顶等效方波参数研究[J]. 汽车工程, 2019, 41(7): 785-791.

Wu Changfeng, Zhang Junyuan, Na Jingxin, Su Liang, Lan Pinghui ,Lu Linzhao. A Research on TESW Parameters Base on Coach Occupant Injury[J]. Automotive Engineering, 2019, 41(7): 785-791.

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