CAJ | 학술논문

环肋圆柱壳是潜艇等水下结构物的主要组成部分，静水压力下的径向撞击是其面临的最为恶劣的载荷环境之一．采用MSC ．DYTRAN非线性有限元软件，对较小静压下环肋圆柱壳的碰撞过程进行了数值仿真，分析了壳体的变形及吸能特性，比较了不同静压，不同撞击载荷下，静压做功值及其在总变形能中所占的比例．结果表明，较小静压环境下，随着静压的变化，静压做功值呈非线性变化，但其所占总变形能的比例却基本为线性变化，且后者与撞击体的初始动能无明显关系．
배륵원주각시잠정등수하결구물적주요조성부분，정수압력하적경향당격시기면림적최위악렬적재하배경지일．채용MSC ．DYTRAN비선성유한원연건，대교소정압하배륵원주각적팽당과정진행료수치방진，분석료각체적변형급흡능특성，비교료불동정압，불동당격재하하，정압주공치급기재총변형능중소점적비례．결과표명，교소정압배경하，수착정압적변화，정압주공치정비선성변화，단기소점총변형능적비례각기본위선성변화，차후자여당격체적초시동능무명현관계．
Ring‐stiffened cylindrical shell is the main component of underwater structure like subma‐rine ,and radial collision underwater is one of the most dangerous environment it faces .MSC .DYT‐RAN software was used to simulate the collision process of ring‐stiffened cylinder subjected to lower hydrostatic pressure .The structure’s deformation and energy absorption ,as well as the work did by hydrostatic pressure was researched under different hydrostatic pressure and different impact intensi‐ty .The results show :As hydrostatic pressure changes ,the work it does vary in a non‐linear way , w hile its proportion in total distortional energy seems to vary linearly and has no obvious relationship with the initial kinetic energy of striker .