加筋圆柱壳水下爆炸动响应数值模拟

圆柱壳是潜艇和海洋工程结构物广泛采用的结构单元,研究其水下爆炸动响应有助于深入了解圆柱壳结构的失效规律和机理,对于提高潜艇的生命力和战斗力有着重要的意义.本文首先研究了采用ABAQUS软件的水下爆炸载荷模型和计算参数的选取范围,然后选取加筋圆柱壳舱段为研究对象进行水下爆炸数值模拟,计算得出基座的冲击环境与试验数据吻合良好.本文进一步对圆柱壳在水下爆炸条件下的动响应规律进行了研究,得出了结构不同部位冲击动响应和冲击环境,并对不同部位冲击环境的差异进行了分析,得出了复杂圆柱壳结构在水下爆炸作用下的动响应和冲击环境规律.

Numerical simulation of dynamic response of ring-stiffened cylindrical shell subjected to underwater explosions

A cylinder is the primary component of civilian and naval marine structures and often subjected to impulsive loads.Research on the structural damage effects and the shock environment of shipboard equipments due to underwater explosions is of great importance in improving the survivability and battle capacity of submarines.At first,the underwater explosion load and the suitable choice of the computation parameters of ABAQUS code on underwater explosion analysis are investigated.Then the numerical investigations on two kinds of ring-stiffened cylindrical shells,a short one and a long one,subjected to underwater explosions are presented.The numerical results of shock environment are consistent with the experimental data.Some conclusions on dynamic responses and shock environments are also obtained for the more complex cylinder with resilient mounting equipments and their base to underwater explosions.