吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (1): 29-37.doi: 10.13229/j.cnki.jdxbgxb201501005

• Orignal Article • Previous Articles     Next Articles

Body-in-white lightweight based on multidisciplinary design optimization

WANG Deng-feng1, LU Fang1,2   

  1. 1.State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022,China;
    2.Technology Development Department, FAW-Volkswagen Automotive Company, Ltd., Changchun 130011,China
  • Received:2013-12-04 Online:2015-02-01 Published:2015-02-01

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Abstract: A Finite Element Model (FEM) of a homemade car is established, and according to the side impact and Noise-Vibration-Harshness (NVH) requirement, Multidisciplinary Design Optimization (MDO) is carried out for the Body-in-White (BIW) of this car. First, on the basis of the simulation results of side impact and NVH, the thickness and materials of several parts of BIW are selected as the design variables; the mass and stiffness of BIW are taken the objectives; and the constraints include the velocity and intrusion of side impact. Then, a Radial basis Function (RBF) approximate model for stiffness and a stepwise-Response Surface Model (RSM) for side impact are established. Finally, multi-objective optimization is performed using Adaptive Simulated Annealing (ASA) algorithm. Results show that the mass of BIW can be reduced by 15.7 kg while keeping its performance of crashworthiness and NVH.

Key words: vehicle engineering, BIW lightweight, multidisciplinary optimization, approximate model

CLC Number: 

  • U461.91
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