Multiobjective crashworthiness optimization design of foam-filled sandwich wall multi-cell structures

WEN Gui-lin1,2,KONG Xiang-zheng1,2, YIN Han-feng1,2, XIAO Jiu-ru2

Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (5) : 115-121.

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PDF(1927 KB)
Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (5) : 115-121.

Multiobjective crashworthiness optimization design of foam-filled sandwich wall multi-cell structures

  • Foam-filled tubes have gained more and more attention due to their excellent energy absorption capacity. According to the study of luffa structure, a kind of foam-filled sandwich wall multi-cell structures similar to the luffa cross-section was raised. Based on the nonlinear finite element code LS-DYNA, the axial crushing finite element model of the foam-filled sandwich wall multi-cell structures was established. Based on the polynomial surrogate model, the structures with different size were optimized by adopting multiobjective particle swarm optimization algorithm. Give the opinions on the choice of different structures according to the result of optimization, which makes the selected structure have the best energy absorption characteristics under the peak force constraint. The new type structure raised by this paper has a good application prospect in automotive, aerospace and other fields.
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Abstract

Foam-filled tubes have gained more and more attention due to their excellent energy absorption capacity. According to the study of luffa structure, a kind of foam-filled sandwich wall multi-cell structures similar to the luffa cross-section was raised. Based on the nonlinear finite element code LS-DYNA, the axial crushing finite element model of the foam-filled sandwich wall multi-cell structures was established. Based on the polynomial surrogate model, the structures with different size were optimized by adopting multiobjective particle swarm optimization algorithm. Give the opinions on the choice of different structures according to the result of optimization, which makes the selected structure have the best energy absorption characteristics under the peak force constraint. The new type structure raised by this paper has a good application prospect in automotive, aerospace and other fields.

Key words

Foam-filled / Luffa structure / Crashworthiness / Multiobjectie optimization

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WEN Gui-lin1,2,KONG Xiang-zheng1,2, YIN Han-feng1,2, XIAO Jiu-ru2. Multiobjective crashworthiness optimization design of foam-filled sandwich wall multi-cell structures[J]. Journal of Vibration and Shock, 2015, 34(5): 115-121

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