冲击载荷下含表面裂纹潜艇典型结构的动态断裂研究

Research on dynamic fracture of typical structure of submarine with surface crack under impact loading

文章基于大型通用有限元分析软件ANSYS研究了带有初始表面裂纹的潜艇典型结构在不同下潜深度、不同爆心到船壳距离R和不同作用方位冲击载荷作用下的动态应力强度因子及其最大值与冲击因子的变化规律,然后以921A钢为例对多种工况下结构是否发生失稳断裂作出初步判断。

Based on finite element analysis software ANSYS, the dynamic stress intensity factor and the variety law of its maximum value along with the impulsive factor of the typical structures of the submarine with a initial surface crack are researched. Different depth of the submarine, different distance from the blast center and different orientation of blast point and ship are considered.Then taking 921A steel for example, the unstable fractured of the typical structure of the submarine is preliminary judged under the various conditions.