Journal of South China University of Technology(Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (8): 7-12.doi: 10.3969/j.issn.1000-565X.2017.08.002

• Automotive Engineering • Previous Articles     Next Articles

Lightweight Design of Bus Frame Constrained by Static and Dynamic Stiffness

ZUO Wen-jie1,2 MA Hong-gang1,3 GUI Chun-yang2 LI Hang4   

  1. 1.State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130025,Jilin,China; 2.College of Mechanical Science and Engineering，Jilin University,Changchun 130025,Jilin,China; 3.College of Automotive Engineering,Jilin University,Changchun 130025,Jilin,China; 4.Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,Jilin,China
  • Received:2016-09-27 Revised:2017-02-16 Online:2017-08-25 Published:2017-07-02
  • Contact: 左文杰(1981-)，男，博士，副教授，主要从事汽车结构轻量化研究． E-mail:zuowenjie@jlu.edu.cn
  • About author:左文杰(1981-)，男，博士，副教授，主要从事汽车结构轻量化研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China(51575226) and the Plan for Scientific and Technological Development of Jilin Province(20140101071JC)

PDF

261

Abstract: In order to achieve a lightweight structure of the bus frame consisting of rectangular tubes,first,the cross-sectional properties of the rectangular tubes are calculated,and the responses of static bending stiffness,static torsional stiffness，and dynamic frequency stiffness are respectively defined.Next,a structural optimization model of the bus frame is constructed.In the model，the objective function is the structural mass,the design variables are the cross-sectional breadth,height,and thickness of the rectangular tubes,and the constraints are the bending,torsional and frequency stiffness.Then,the sensitivity information of the responses with respect to the design varia- bles is derived,and the nonlinear optimization model is solved through the sequential linear programming.Finally， by a numerical example,it is proved that the proposed method can efficiently acquire the optimal bus frame that satisfies the constraint conditions.

Key words: bus frame, lightweight design, bending and torsional stiffness, frequency stiffness, structural optimization