钛合金耐压壳在碰撞下的动力屈曲数值模拟  

Numerical simulation of titanium alloy pressure shell′s dynamic buckling under collision

作　　者：王林[1,2] 刘桢 刘平 WANG Lin;LIU Zhen;LIU Ping(School of Naval Architecture and Ocean Engineering,Jingsu University of Science and Technology,Zhenjiang 212003,China;School of Civil Engineering and Architecture,Jingsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003 [2]江苏科技大学土木工程与建筑学院,江苏镇江212003

出　　处：《舰船科学技术》2021年第23期55-58,共4页Ship Science and Technology

摘　　要：潜器在航行时有可能与礁石、冰山、其他潜器等发生碰撞事故,碰撞会导致潜器部分结构出现受损、变形、发生屈曲等情况。近年以来,耐压结构在碰撞下的动力屈曲问题引来众多学者的关注与研究。本文利用有限元软件Ansys/Ls-dyna对钛合金耐压壳在碰撞下的动力屈曲展开研究,分析撞击速度对耐压壳动力屈曲的影响。结果表明:在撞击速度达到使耐压壳发生屈曲前,碰撞过程中的最大碰撞力与平均碰撞力的比值可能不变;在不考虑其他因素(耐压壳的厚度,弹性模量,静水压力等)对碰撞力影响的前提下,撞击速度在达到使耐压壳发生动力屈曲前,与最大碰撞力和平均碰撞力近乎呈线性关系。When the submersible is sailing, it may collide with reefs, icebergs, other submersibles, etc. The collision will cause damage, deformation, and buckling of some submersible structures. In recent years, the dynamic buckling of pressure-resistant structures under collision has attracted the attention and research of many scholars. In this paper, the finite element software Ansys/Ls-dyna is used to study the dynamic buckling of a titanium alloy pressure shell under collision. The result of impact velocity on the dynamic buckling of the pressure shell shows that the ratio of the maximum collision force to the average collision force during the collision may be unchanged before the impact velocity reaches the buckling of the pressure shell;The impact speed is almost linearly related to the maximum collision force and the average collision force before the impact velocity reaches the buckling of the pressure shell,Without considering the influence of other factors(thickness of the pressure shell, elastic modulus, hydrostatic pressure, etc.) on the collision force.

关 键 词：耐压壳 碰撞 动力屈曲 钛合金 

分 类 号：U668[交通运输工程—船舶及航道工程]