基于乘员损伤的汽车正面碰撞减速度波形优化

中国机械工程 ›› 2013, Vol. 24 ›› Issue (5): 690-695.

基于乘员损伤的汽车正面碰撞减速度波形优化

李铁柱;李光耀;赵敏;顾纪超

湖南大学汽车车身先进设计制造国家重点实验室，长沙，410082

出版日期:2013-03-10 发布日期:2013-03-19
基金资助:
国家重点基础研究发展计划(973计划)资助项目(2010CB328005)；长江学者与创新团队发展计划资助项目
National Program on Key Basic Research Project (973 Program)（No. 2010CB328005）;
Supported by Program for Changjiang Scholars and Innovative Research Team in University

Crash Pulse Optimization of Vehicle Frontal Impact Based on Occupant Injury

Li Tiezhu;Li Guangyao;Zhao Min;Gu Jichao

State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan University,Changsha,410082

Online:2013-03-10 Published:2013-03-19
Supported by:

National Program on Key Basic Research Project (973 Program)（No. 2010CB328005）;
Supported by Program for Changjiang Scholars and Innovative Research Team in University

摘要/Abstract

摘要：

以车身减速度为研究对象，以乘员损伤指标为目标，对减速度波形进行简化并对其进行优化，为车身改进提供方向，实现车身耐撞性的正向设计。针对某款微型客车，在该车100%正面碰撞试验的基础上，利用乘员损伤分析软件建立了该车的正面碰撞乘员约束系统模型并对模型进行了验证。对该车的减速度波形进行了简化，以约束系统模型为基础，对简化减速度波形进行优化。针对特定的乘员损伤指标，优化得到了最优的车身减速度波形。为了提高计算效率，通过实验设计构建了乘员约束系统的Kriging近似模型的代替仿真模型。结果表明：该方法能更为合理地利用车身前部的压溃空间，为车身修改提供改进方向及目标，有利于车身安全性的正向设计，具有较强的工程实用性。

关键词: 汽车被动安全, 正面碰撞, 减速度波形, 乘员约束系统, 近似模型

Abstract:

With the occupant injury indices as target, crash pulse was researched and simplified. And then crash pulse was optimized to provide improved direction for the body to achieve a forward design of body crashworthiness. Aiming at a minibus, an occupant restraint system of the minibus was modeled using mathematical dynamic model (MADYMO) software and validated based on the frontal impact test. The crash pulse was simplified to optimize the deceleration waveform based on the restraint system model. For specific occupant injury indices, the optimal deceleration waveform was gained. In order to improve efficiency, through the design of experiments Kriging approximation model of the occupant restraint system was built instead of simulation model. The results show that the method can realize that the crush space of the front body can be used rationally and provide improved direction and goals for body. The method that is conducive to a forward design of body crashworthiness has a strong engineering practicability.

Key words: vehicle passive safety, frontal impact, crash pulse, occupant restraint system, approximation model

中图分类号:

U461.91

李铁柱, 李光耀, 赵敏, 顾纪超. 基于乘员损伤的汽车正面碰撞减速度波形优化[J]. 中国机械工程, 2013, 24(5): 690-695.

LI Tie-Zhu, LI Guang-Yao, DIAO Min, GU Ji-Chao. Crash Pulse Optimization of Vehicle Frontal Impact Based on Occupant Injury[J]. China Mechanical Engineering, 2013, 24(5): 690-695.

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