水下航行器壳体结构的多目标模糊优化设计

Multiobjective Fuzzy Weight Optimization Design of Underwater Vehicle Shell Structure

提出了水下航行器壳体结构的多目标模糊优化设计方法。以某水下航行器为例，将壳体结构分为头部、中段和尾部三部分，分别建立其质量最小的目标函数，并采用多目标模糊优化设计方法求出水下航行器整个壳体结构质量最小的有效解，其结果与安全系数法设计的结果相比，壳体质量约降低１５％。本文提出的水下航行器壳体结构的设计方法不但考虑了壳体的结构特点，而且还考虑了设计变量和约束条件的模糊性，具有一定的理论先进性，对提高壳体结构设计水平有着重要的意义，对其它壳体结构设计也具有参考价值。

We use fuzzy optimization method to reduce the design weight of underwater vehicle in China. We employ eqs.(8), (9), and (10) as the objective functions of its head, middle section , and tail respectively. Eqs.(12) and (13) are the fuzzy strength constraint conditions and fuzzy stability constraint conditions respectively. Eq.(14) expresses the fuzzy constraint conditions of design variables. Compared with the safety coefficient design method generally used in China, our fuzzy optimization method can achieve weight reduction of about 15% for underwater vehicle shell structure.