Once the undersea crafts collided by object underwater, the consequences could be disastrous. In order to improve its structure safety, the typical pressure structure of undersea crafts, double cylindrical shell structure was selected as the investigation object. The MSC. DYTRAN software was used to analyze the damage process of double cylindrical shell structure collided by object in three different environments: fluid-solid coupling combined effects of static water pressure, only static water pressure effect and only fluid-solid coupling effect on the double cylindrical shell structure. Through the comparison and analysis of simulation results, the influences of deep water pressure and fluid-solid coupling on damage process, energy transformation and impact force during the collision were studied. The results of this study provide reference for collision research and anti-collision design of undersea crafts.%水下运载器一旦受到物体撞击造成破舱进水,后果不堪设想.为了提高水下运载器的结构安全性,选取其典型耐压结构形式--双层圆柱壳结构为研究对象,采用MSC.Dytran非线性瞬态动力学分析程序,分3种撞击环境:流固耦合与深水静压联合作用、单深水静压作用以及单流固耦合作用,对双层圆柱壳结构受物体撞击的损伤过程进行数值仿真.通过对计算结果的对比分析,研究了深水压力及流固耦合作用对受撞结构的损伤变形、撞击过程中的能量转换和撞击力的影响.本文的研究成果,可为水下运载器的碰撞研究及抗撞结构设计提供借鉴.
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