潜艇典型舱段水下爆炸动态响应分析

DYNAMIC RESPONSE OF A TYPICAL SUBMARINE COMPARTMENT SUBJECTED TO UNDERWATER EXPLOSION

基于显式动力学分析程序ANSYS-LSDYNA,对潜艇典型舱段受到水下近场爆炸冲击作用下的非线性动态响应进行了研究。根据水下爆炸理论和数值计算结果,详细探讨了单壳体潜艇水下近场爆炸现象的持续过程,并讨论了冲击波、局部孔穴、气泡运动造成的滞后流等在单壳体潜艇受到水下近场爆炸不同阶段所起的作用。计算了单壳体潜艇受到水下近场爆炸冲击波作用下的响应并与双壳体潜艇的结果进行了对比。本研究对正确理解水下爆炸现象和潜艇的水下爆炸抗冲击设计有重要意义。

Based on the explicit finite element code ANSYS-LSDYNA,non-linear dynamic response of an immersed typical submarine compartment subjected to underwater explosion is analyzed. According to the theory of underwater explosion and numerical calculation results, the actions of shock wave, local cavitation and afterflow induced by expanding bubble in different phases of a single-hull submarine subjected to near-field underwater explosion are investigated in detail. the responses of the single-hull submarine subjected to near-field underwater explosion are computed and they are compared with those of the double-hull submarine. The results presented here are important not only for understanding the phenomena of underwater explosion, but also for anti-shock design of submarine structure.