多管火箭炮定向管的多目标优化及多属性决策研究

针对某多管火箭炮(MRLS)复合材料定向管的结构设计指标,根据有限元分析方法和优化设计方法,以复合材料定向管的复合铺层厚度、铺层角度及定向管中定位部的位置为优化设计变量,定义定向管固有频率和定向管质量为优化目标,结合有限元数值计算结果,采用改进非支配排序遗传算法(NSGA-Ⅱ),建立了复合材料定向管的多目标优化模型。通过优化求解,得到帕雷托(Pareto)最优解,并由这些Pareto最优解构成决策矩阵,利用客观赋权的信息熵法计算各属性的权值,并运用逼近理想解的排序方法(TOPSIS)进行了多属性决策研究(MADM),对Pareto最优解作了排序。引入比刚度结构效能对比分析优化前后的定向管性能,表明对定向管的优化设计是有效的。

Study on MRLS Direction Pipe's Multi-objective Optimization and Multi-attribute Decision Making

A multi-objective optimization model of multi-rocket launch system (MRLS) composite material direction pipe was established for the structure design requirements by using non-dominated sorting genetic algorithm Ⅱ (NSGA-Ⅱ), on the basis of finite element analysis method and optimization method. The composite material direction pipe's ply thickness, lamination angle and middle location value were defined as design variables. The direction pipe’s natural frequency and mass were regarded as optimization objectives. The Pareto-optimal solution set of the direction pipe was obtained, and then the decision matrix was constructed by the set. The objective weight information entropy approach was adopted to calculate the weights of attributes, also the multi-attribute decision making (MADM) was applied to rank the Pareto-optimal solutions and determine the best solution based on the technique for order preference by similarity to ideal solution (TOPSIS) method. Comparisons of the direction pipe's properties by specific stiffness structural efficiency show that the optimization design is effective.