分层多孔抗冲覆盖层水下爆炸响应分析

Transient Response of Stepwise Graded Cellular Cladding to Underwater Explosion

针对芯层为分层多孔泡沫的抗冲覆盖层在水下非接触爆炸冲击波作用时的响应进行了理论分析。对比了分层覆盖层与均匀覆盖层的冲击防护效果。结果表明:在同样的入射冲击波作用下,分层多孔覆盖层能有效降低覆盖层的厚度,抵抗更强的冲击波;但是,分层多孔覆盖层传递到被保护结构的应力要大于均匀覆盖层。该研究结果能为梯度覆盖层的设计提供参考。

The transient response of the stepwise graded cellular cladding to noncontact underwater explosion shock wave is analyzed. The shock resistance ability of the stepwise graded cellular cladding is compared with that of the equivalent uniform cellular cladding. The results indicate that under the same incident shock wave, only smaller thickness is needed for the stepwise graded cellular cladding than that for the equivalent uniform cladding. In other words, the graded cladding performs better than the equivalent uniform cladding in shock energy absorbing. However, the stress transmitted to the protected structure is larger for the graded cladding than that for the uniform cladding. The research results can guide the design of graded cellular cladding subjected to underwater blast.