• CN:11-2187/TH
  • ISSN:0577-6686

›› 2011, Vol. 47 ›› Issue (24): 97-103.

• 论文 • 上一篇    下一篇

基于双响应面模型的碰撞安全性稳健性优化设计

崔杰;张维刚;常伟波;谢伦杰   

  1. 湖南大学汽车车身先进设计制造国家重点实验室
  • 发布日期:2011-12-20

Robustness Optimization for Crash Safety Based on Dual-response Surface Model

CUI Jie;ZHANG Weigang;CHANG Weibo;XIE Lunjie   

  1. State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University
  • Published:2011-12-20

摘要: 建立稳健的车体耐撞结构是提高汽车碰撞安全性的有效途径。传统的耐撞性优化设计,由于忽视制造工艺、材料特性和边界条件中存在的不确定因素,导致汽车碰撞安全性能不够稳健。近年来,稳健性设计得到广泛的关注,并在汽车工业中得到应用。将稳健性设计方法应用到汽车碰撞安全性设计中,以某轿车的前纵梁为研究对象,运用双响应面方法对其进行稳健性优化设计。采用拉丁超立方抽样(Latin hypercube sampling,LHS)方法和最小二乘方法创建碰撞响应的二阶多项式双响应面模型,将材料特性作为不确定性因素。稳健性优化后,对前纵梁碰撞性能的稳健性与优化前进行对比分析。分析结果表明,该稳健性设计方法精度较高;经稳健性优化后,前纵梁碰撞性能的稳健性获得了显著提高,且质量减少了3.32%。

关键词: 碰撞安全性, 双响应面模型, 稳健性设计

Abstract: Robust framework of vehicle body is important to improve the performance of crash safety. Unfortunately, because of neglecting uncertainty variables in manufacturing, material properties and operating conditions, the performance of vehicle crash safety is unstable. In recent years, robust design has been gaining wide attention and applying in automotive industry. The application of dual-response surface method is performed to the robust design of the crashworthiness of a car front rail. In the optimization process, the Latin hypercube sampling(LHS) method and least square method are applied to construct the dual-response surface model, which is second order polynomial response surface, and the scatters of material properties are considered. After the optimization, the robust analysis of the rail is performed. Results show that the dual-response surface method is of high precision, the robustness of front rail crashworthiness is significantly improved, and the weight reduction has reached 3.32% after the robust optimization.

Key words: Crash safety, Dual-response surface model, Robustness optimization

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