This paper presents an extension of our previous work on decomposition-based assembly synthesis for structural stiffness, where the three-dimensional finite element model of a vehicle body-in-white (BIW) is optimally decomposed into a set of components considering (1) stiffness of the assembled structure under given loading conditions, (2) manufacturability, and (3) assembleability of components. Two case studies, each focusing on the decomposition of a different portion of a BIW, are discussed. In the first case study, the side frame is decomposed for the minimum distortion of front door frame geometry under global bending. In the second case study, the side/floor frame and floor panels are decomposed for the minimum floor deflections under global bending. In each case study, multiobjective genetic algorithm with graph-based crossover, combined with finite element methods analyses, is used to obtain Pareto optimal solutions. Representative designs are selected from the Pareto front and trade-offs among stiffness, manufacturability, and assembleability are discussed.
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e-mail: nlyu@umich.edu
e-mail: kazu@umich.edu
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January 2005
Technical Papers
Decomposition-Based Assembly Synthesis of a Three-Dimensional Body-in-White Model for Structural Stiffness
Naesung Lyu,
e-mail: nlyu@umich.edu
Naesung Lyu
Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125
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Kazuhiro Saitou
e-mail: kazu@umich.edu
Kazuhiro Saitou
Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125
Search for other works by this author on:
Naesung Lyu
Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125
e-mail: nlyu@umich.edu
Kazuhiro Saitou
Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125
e-mail: kazu@umich.edu
Contributed by the Design Automation Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received July, 2003; revised March, 2004. Associate Editor: K. K. Choi.
J. Mech. Des. Jan 2005, 127(1): 34-48 (15 pages)
Published Online: March 2, 2005
Article history
Received:
July 1, 2003
Revised:
March 1, 2004
Online:
March 2, 2005
Citation
Lyu, N., and Saitou, K. (March 2, 2005). "Decomposition-Based Assembly Synthesis of a Three-Dimensional Body-in-White Model for Structural Stiffness ." ASME. J. Mech. Des. January 2005; 127(1): 34–48. https://doi.org/10.1115/1.1799551
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