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Automotive Engineering ›› 2024, Vol. 46 ›› Issue (6): 1075-1084.doi: 10.19562/j.chinasae.qcgc.2024.06.014

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Platform Design of Vehicle Body Based on Multi-object Discrete Topology Optimization

Junwei Hua1,Wenbin Hou1,2()   

  1. 1.School of Automotive Engineering,Dalian University of Technology,Dalian 116024
    2.Ningbo Research Institute,Dalian University of Technology,Ningbo 315016
  • Received:2023-10-19 Revised:2023-12-27 Online:2024-06-25 Published:2024-06-19
  • Contact: Wenbin Hou E-mail:houwb@dlut.edu.cn

Abstract:

Platform design for product families can increase component commonality and reduce production cost. However, current research on platform is primarily concentrated at the parametric design, lacking direct methods for platform design at the topology structure of product. Therefore, a parallel design method suitable for multi-objects topology structure for the platform design requirements of vehicle body structure is proposed in this paper. Firstly, the improved graph decomposition algorithm is combined with multi-objective genetic algorithm to obtain the optimal design solution for the topology structure partition of a single vehicle body. Then, a multi-population and multi-chromosome genetic algorithm (MPMCGA) for multi-object optimization is proposed based on the modular design process of vehicle body topology structure, which ensures that the design objective loss of each object is within an allowable range while enhancing the sharing potential of modules. Finally, platform design is applied to the underbody panel of three concept vehicle bodies, verifying the effectiveness of the multi-object discrete topology optimization method.

Key words: vehicle body design, platform design, discrete topology optimization, genetic algorithm