吉林大学学报(工学版) ›› 2014, Vol. 44 ›› Issue (6): 1564-1570.doi: 10.13229/j.cnki.jdxbgxb201406005

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Top-down design method based on local search and global optimization for cross-sectional size of bus body

NA Jing-xin, GAO Jian-feng   

  1. State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China
  • Received:2013-09-24 Online:2014-11-01 Published:2014-11-01

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Abstract: In this paper, first, the lightest structure under the strength condition was obtained via the implementation of strength optimization based on the wire-frame model of body structure and the sectional library. Sequencing optimization of the sectional library, local line search and local-global iterative process were contained in the strength optimization. Second, sensitivity analysis was carried out to select design variables, which are more sensitive to the stiffness and modal frequency of the body structure. Finally, the selected variables were optimized within the limits of sectional library to improve the performance of the body stiffness and modal frequency using the multi-objective genetic algorithm NSGA-II. This approach was implemented into the design process of an integral bus body. The results indicate that the proposed sectional optimization method is efficient and conducive to light-weighting of bus bodies.

Key words: vehicle engineering, bus body, top-down design, sectional optimization, line search, multi-objective genetic algorithm

CLC Number: 

  • U463.82
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