基于材料选型优化的金属-复合材料组合结构-声辐射优化

基于金属铺层假设，以结构材料属性和材料铺层数量为设计变量，建立了基于金属-复合材料的材料选型结构-声辐射优化设计模型。以钢-纤维增强复合材料组合结构为例，开展了多设计变量、多约束条件的结构-声辐射优化研究。最后，采用遗传算法进行求解，实现了结构材料的转换。数值算例表明，通过金属-复合材料组合结构的材料选型优化，可以有效降低钢-纤维增强复合材料结构的振动和声辐射。文中的研究方法为结构材料的分布优化提供了一种可行有效的思路。

Structural acoustic optimization of hybrid metal composite structure based on material selection optimization approach

According to the stacking sequence hypothesis of metal, the corresponding material selection optimization mathematical model of hybrid metal-composite structure was established with the material property and layers number as design variables. Taking the hybrid steel-fiber reinforced composite structure as an example, the structural-acoustic radiation dynamic optimization design with multi-variables and multi-constraints problem was presented. In the end, by introducing genetic algorithm, the optimization problems were solved, and the structural material conversion was achieved. The numerical calculation shows that the vibration and acoustic radiation of the hybrid metal-composite structure can be reduced by using material selection optimization method. The paper provides an effective and feasible method to solve the problem for multi-material distribute optimization.