关键词: 多面体体胞;抗撞性优化;演变参数;近似模型

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