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Volume 30 Issue 12
Dec.  2004
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Journal of Beijing University of Aeronautics and Astronautics  > 2004  >  30(12): 1163-1167.
Wang Ziliang, Fang Jiancheng, Quan Weiet al. Multi-model Kalman filter algorism based on GA[J]. Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(08): 748-752. (in Chinese)
Citation: Sun Lingyu, Yao Yingxian. Theoretical study on lightweight design of thin-walled beam structure for automobile body[J]. Journal of Beijing University of Aeronautics and Astronautics, 2004, 30(12): 1163-1167. (in Chinese)
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Theoretical study on lightweight design of thin-walled beam structure for automobile body

  • Dept. of Automobile Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 12 Sep 2003
  • Publish Date: 31 Dec 2004
    Abstract
  • The main load-supporting elements for an automobile framework are thin-walled beams. To study the effectiveness of lightweighting on the body stiffness, the analytical formulae describing static bending and torsional stiffness of a beam with fixed-fixed supporters were derived firstly. To get a light thin-walled beam structure with optimum section, the influence of every sectional geometry parameter on the stiffness-mass ratio was discussed respectively. After replacing the steel by the lightweight material, the corresponding variations in structural stiffness and size were analyzed. The stiffness-mass ratios of beams with open and close loop sections were also compared with each other. Finally, a few geometrical and material parameters, which can greatly influence the bending or torsional stiffness of these thin-walled beams, were found out. For a typical thin-walled beam applied in an automobile body, the design guideline achieving both lightweight and high stiffness is presented.

     

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    • References(1)
  • [1] Cole G S, Sherman A M. Lightweight materials for automotive applications[J]. Materials Characterization, 1995, 35(1):3~9 [2]Suh M W, Lee J H, Cho K Y, et al. Section property method and section shape method for the optimum design of vehicle body structures[J]. International Journal of Vehicle Design, 2002, 30(1-2):115~134 [3]Vinot P, Cogan S, Piranda J. Shape optimization of thin-walled beam-like structures[J]. Thin-Walled Structures, 2001, 39(7):611~630 [4]Kim Y Y, Kim T S. Topology optimization of beam cross sections[J]. International Journal of Solids and Structures, 2000, 37:477~493
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