The purpose of this article is to develop numerical models for topology optimization of sandwich panels subjected to impact loads. Numerical models account for the effects of energy absorption capability and impact load resistant capacity on the development of optimal designs. A topology optimization technique based on the evolutionary structural optimization method and nonlinear dynamic finite element analysis with deflection and periodic constraints is used to generate optimal designs of sandwich panels under impact loads. To demonstrate the efficiency of the proposed method, design optimization of various sandwich panels is evaluated. A parametric study is conducted to investigate the effects of unit cells, core height, stiffener configuration and impact load intensity on the optimal designs. Up to 50% reduction in weight, 30% increase in energy absorption and 30% decrease in boundary reaction forces are achieved. Thus, the proposed approach can provide reliable manufacturing designs for sandwich panels under impact loads.

本文的目的是开发用于承受冲击载荷的夹层板拓扑优化的数值模型。数值模型考虑了能量吸收能力和抗冲击载荷能力对优化设计开发的影响。基于演化结构优化方法和具有挠度和周期约束的非线性动态有限元分析的拓扑优化技术用于生成冲击载荷下夹层板的优化设计。为了证明所提出方法的效率，对各种夹层板的设计优化进行了评估。进行参数研究以研究单元格、核心高度、加强筋配置和冲击载荷强度对优化设计的影响。重量减轻高达 50%，能量吸收增加 30%，边界反作用力减少 30%。因此，所提出的方法可以为在冲击载荷下的夹层板提供可靠的制造设计。