局部损伤环肋圆柱壳的强度分析和加强方案

摘要

The pressure hull of submarine may be damaged locally by collision,explosion or vessel grounding and so on.It is significant to strengthen the pressure hull locally,by which submarine can dive to the depth designed and the battle effectiveness of submarine could be maintained.The strength of pressure hull damaged locally was calculated by FEM and the strengthen project was proposed.As for the ring-stiffened cylindrical shell with large local indentation,the maximal stress value increases compared with ideal ring-stiffened cylindrical shell.The stress value meets the requirements of strength when the ring-stiffened cylindrical shell was strengthened with stiffener.The project could be used in engineering.%潜艇在服役过程中,可能会因碰撞、搁浅、爆炸等事故,使耐压壳体出现局部损伤.对损伤部位进行合理加强,保证加强后潜艇依然可以下潜到设计深度,对于维持潜艇的战斗力有重要意义.本文以局部损伤潜艇耐压壳体为研究对象,对局部损伤后的强度进行数值计算,并提出加强方案.结果表明,带有局部损伤的环肋圆柱壳与完好状态下环肋圆柱壳相比,最大应力提高;采用加强筋进行局部加强后,壳体的应力指标满足要求.本文提出的加强方案可以在工程中应用.