潜艇内部平面舱壁极限承载能力分析

The ultimate bearing capability analysis of the submarine internal plane bulkhead

通过对潜艇内部平面舱壁结构在破舱工况下的双重非线性有限元计算,以梁的塑性铰机构理论为基础,揭示了舱壁水平大梁的塑性破坏机理—水平横梁形成四塑性铰极限机构,最终确定其极限承载能力。同时,对舱壁水平大梁抽象出的简单梁进行了极限承载能力的分析,并与舱壁水平大梁进行比较,提出了舱壁水平大梁形成的极限机构不同于简单梁极限机构—三塑性铰机构的原因。

Through the double nonlinear finite element calculation for the submarine internal plane bulkhead, the plastic collapse mechanism for the horizontal girder-forming the ultimate framework of four plastic hinges, on the basis of the plastic hinge theory of girders, is put forward, with the ultimate bearing capability of the bulkhead ascertained finally. While, the ultimate bearing capability of simple girders abstracted from the horizontal girders of bulkhead are analyzed, and the reason why the four plastic hinges of horizontal girders of the bulkhead are formed is explained through comparing the ultimate framework of simple girders with the horizontal girders of the bulkhead.