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集中质量-弹簧碰撞模型在汽车被动安全预研阶段的应用
引用本文:赵凯绅,施欲亮,张秀琴,吴沈荣.集中质量-弹簧碰撞模型在汽车被动安全预研阶段的应用[J].计算机辅助工程,2013,22(2):15-19.
作者姓名:赵凯绅  施欲亮  张秀琴  吴沈荣
作者单位:奇瑞汽车股份有限公司,奇瑞汽车股份有限公司,奇瑞汽车股份有限公司,奇瑞汽车股份有限公司
摘    要:为在车身开发的概念设计阶段明确车辆前碰的安全性目标加速度波形,提出以乘员伤害值确定整车正面碰撞波形的方法,建立包括驾乘人员的车辆集中质量-弹簧(Lumped Mass-Spring,LMS)模型.为确保LMS模型的有效性,将整车有限元模型仿真结果与运动学特性计算结果对比.通过对比前碰加速度波形、刚性墙力以及前舱总的压溃位移,对LMS模型的有效性进行验证.以乘员胸部的乘约效率为优化目标,基于已验证的LMS模型进行关键参数的试验设计分析,从而为车辆前结构的碰撞安全性能设计提供参考.

关 键 词:汽车  碰撞安全  LMS模型  目标加速度  乘约效率  模型验证  优化
收稿时间:9/6/2012 12:00:00 AM
修稿时间:2012/10/9 0:00:00

Application of lumped mass spring model in vehicle passive safety pre-research stage
ZHAO Kaishen,SHI Yuliang,ZHANG Xiuqin and WU Shenrong.Application of lumped mass spring model in vehicle passive safety pre-research stage[J].Computer Aided Engineering,2013,22(2):15-19.
Authors:ZHAO Kaishen  SHI Yuliang  ZHANG Xiuqin and WU Shenrong
Institution:Chery Automobile Co., Ltd.,Chery Automobile Co., Ltd.,Chery Automobile Co., Ltd. and Chery Automobile Co., Ltd.
Abstract:To determine the safety target acceleration waveforms of vehicle frontal impact in the conceptual design phase of vehicle body development, a method that defines the whole vehicle frontal impact waveforms by occupant injury value is proposed, and then the vehicle Lumped Mass-Spring(LMS) model including occupants is built. To ensure the effectiveness of LMS model, the simulation results based on whole vehicle finite element model are compared with the kinematic characteristics calculation results. Through the comparison of acceleration waveforms, force on rigid wall and general crushing distance of front cabin, the effectiveness of the LMS model is verified. Taking the ride down efficiency of occupant' s chest as optimization target, based on the confirmed LMS model, the test design analysis of key parameters are done, that can provide design reference for the impact safety performance of vehicle frontal structure.
Keywords:automobile  crash safety  LMS model  target acceleration  ride down efficiency  model verification  optimization
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