Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (7): 90-94.

• Mechanical Engineering • Previous Articles     Next Articles

Comparison of Crashworthiness Optimization Methods of Steel-Aluminum Hybrid Automotive Front Rail

Chen Ji-qing  Huang Xin-hong  Zhou Yun-jiao  Lan Feng-chong   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-12-30 Revised:2012-05-18 Online:2012-07-25 Published:2012-06-01
  • Contact: 陈吉清(1966-) ，女，教授，博士生导师，主要从事车身结构与安全研究． E-mail:chjq@ scut. edu.cn
  • About author:陈吉清(1966-) ，女，教授，博士生导师，主要从事车身结构与安全研究．
  • Supported by:

    国家科技支撑计划项目( 2011BAG03B02) ; 华南理工大学中央高校基本科研业务费专项资金资助项目( 2009ZZ0002)

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Abstract:

In order to solve the conflict between the peak collision force and the total absorbed energy of vehicle’s front rail during collision,a new type of steel-aluminum hybrid structure is presented,in which aluminum alloy and advanced high-strength steel ( AHSS) are respectively used for the front and the back parts. Then,by taking the material type and the sheet thickness as the variables,a mathematical model for the multi-objective optimization in
terms of lightweight and crashworthiness is established,and the feasibility and applicability of such three approximate methods as the polynomial,the Kriging and the radial basis function ( RBF) in solving the combinational optimization problem are investigated. The results show that RBF is more suitable for the combinational optimization concerning material type and sheet thickness,and that the use of steel-aluminum hybrid materials remarkably improves the crashworthiness and lightweight of front rails.

Key words: automotive front rail, steel-aluminum hybrid rail, crashworthiness, approximate model, multi-objective optimization