基于鱼雷壳体强度及稳定性的结构可靠性分析

Reliability Analysis of Torpedo Shell Based on Strength and Stability

针对现有结构设计安全系数方法的弊端,将可靠性设计理念引入鱼雷结构设计领域。结合经典壳体理论计算方法与二次二阶矩法,确定了基于理论公式的壳体结构可靠性安全裕度方程及其求解方法,利用ANSYS软件的概率设计(PDS)模块从有限元角度对壳体结构可靠性进行计算,计算结果验证了该方法的准确性。以上2种方法的引入可搭建连接鱼雷壳体结构设计与鱼雷产品可靠性设计之间的理论桥梁。

The concept of reliability design is introduced into torpedo structure design to rectify the insufficiencies of the con-ventional safety coefficient method.A safety margin equation and the solving approach of torpedo shell structural reliability based on a theoretical formula are proposed by combining the classic theory of torpedo shell and the second-order sec-ond-moment method.Simulation of torpedo shell structure by using the probabilistic design system（PDS） module in software ANSYS is performed to achieve its reliability.The proposed scheme combines structure design with reliability design,which may facilitate the design of torpedo shell.