圆柱壳大开孔补强的应力集中分析

针对潜艇耐压壳体上大开孔补强处的应力集中现象,结合工程实际问题,采用规范和有限元法对潜艇耐压壳体上大开孔不同补强形式进行了研究,建立了相应的模型,并求出了应力集中系数。通过对两种方法的计算结果进行分析比较,发现当围壁加强时,最大周向应力处的弯曲应力不容忽视。结果说明,用有限单元法进行大开孔补强结构设计是合理、有效的,是对规范计算的完善和补充。

Stress Concentration Analysis of Reinforced Cylindrical Shells with Large Opening

Combined with practical engineering,stress concentration on the reinforcement of pressure hull of submarine with large opening was studied.Different forms of reinforcement were investigated by the Finite Element Method(FEM) and rules of thumb.Models were constructed and the stress concentration factors were worked out.By comparing and analyzing the results from these two methods,it shows that the bending hoop stress of opening where lies in maximum hoop membrane stress cannot be ignored when the opening sti...