舱内设备对爆载荷毁伤效应影响的对比分析

舰艇舱室内常按其功能要求安装布置有不同的设备,目前舱室内爆毁伤相关研究主要关注毁伤元对无设备舱室结构的毁伤,而很少考虑舱室内设备对于毁伤效应的影响。基于有限元软件ANSYS/LS-DYNA,建立了带加强筋舱室模型,分别分析了没有安装设备、安装一台设备和对称安装两台设备等三种工况的舰艇舱室,在受战斗部装药内部爆炸载荷作用时舱室结构和设备机柜等效物的毁伤情况,对比分析了设备对毁伤效应的影响。通过对比分析三种工况下毁伤过程、测点压力变化及舱壁飞散速度的结果表明,爆炸发生后,受设备遮挡作用,不同数量的设备将对舱室内部流场分布及角隅部位冲击波的汇聚产生影响,降低了舱室内的最大超压值、改变了最大超压出现的位置,使舱室结构的破坏过程发生变化。

Comparative Analysis of the Damage Effect of Equipments on the Internal Blast Loading in a Cabin

Different types of equipments are installed in the warship cabins according to their functions.However,present research of cabin internal blast damage mainly focuses on the effects of damage elements on vacant cabin,and the effects of the equipments installed in the cabin are seldomly considered.By using the finite element software LS-DYNA,three types of rib-reinforced cabin models,including the one installed with no equipment,the one with one equipment,and the one with two equipments,were built.The analysis of the damage of cabin structure and equipments caused by the internal blast of warhead charge and the comparative analysis of the influence of equipments on the damage effect were conducted.The comparative analysis results show that,because of the obstruction of the equipments,different arrangements of equipments affect the internal flow field distribution of shock waves in a cabin and convergence of shock waves in corners,reduce the maximum overpressure value and change its location,which finally lead to the change of the cabin structure′s damage process.