双层壳体对水下爆炸作用的影响研究

针对目前设计部门感兴趣的双层壳体结构中外壳对水下爆炸作用的影响问题,用简单平面波理论对双层壳体结构的外板对冲击波的透射特性进行分析,给出透射冲击波的计算公式,与试验比较吻合良好.并详细介绍相关的双层平板的水下爆炸试验结果,表明双层壳体结构的外壳对水下爆炸作用的影响主要表现在高频部分,冲击波压力约减小20%,结构冲击加速度和应变响应减小约50%以上,内部流体的作用使对整体冲击响应速度略有增大.

Influence of double hull structure on the effects of underwater explosion

The influence of the outer hull on the response of double hull structure induced by underwater explosion is concerned by ship designers recently.The simple plane wave theory and the double plate test is introduced in details to analyse the transmitting shock wave and the response of the structure.The results show that the calculation of transmission wave is quit agreement with the test data.The outer hull of double hull structure is mainly influence on the response of the structure in region of high frequence,the peak value of presure is reduced about 20%,the accelaration and strain response is reduced about 50%,and the overall velocity response is increased a little due to the action of fluid between the double hull.