Evolvement Mechanism of Unit Cell and Crashworthiness Optimization Design of Polyhedron Sandwich Structure

Abstract

Abstract: In crashworthiness optimization of polyhedron sandwich structure, the height and other geometrical feature of the unit cell are considered as design variables to construct the optimization model. The impact from generating process of the unit cell is neglected. The optimization model is complex even though the distribution density of the unit cell is omitted. The evolvement mechanism of polyhedron unit cell is analyzed. A crashworthiness optimization mathematical model is established based on Kriging approximate model according to the evolvement mechanism. Based on the mathematical model optimization process using genetic algorithm is put forward on getting the crashworthiness optimal solution. The effective absorber and reliability of the polyhedron sandwich structure is illustrated by compared with corrugated sandwich.

Key words: polyhedron unit cell;crashworthiness optimization;evolvement parameters;approximate model

CLC Number:

TH114

LONG Siying;FENG Yixiong;GAO Yicong;TAN Jianrong. Evolvement Mechanism of Unit Cell and Crashworthiness Optimization Design of Polyhedron Sandwich Structure[J]. , 2014, 50(11): 135-143.

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Evolvement Mechanism of Unit Cell and Crashworthiness Optimization Design of Polyhedron Sandwich Structure

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