Study on the Pressure Characteristics of Shock Wave Propagating across Multilayer Structures during Underwater Explosion
Study on the Pressure Characteristics of Shock Wave Propagating across Multilayer Structures during Underwater Explosion
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DOI：
10.1155/2019/9026214
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发表时间：
2019-01
影响因子：
1.6
通讯作者：
Zi-Fei Meng;Xue-Yan Cao;F. Ming;A. Zhang;Bin Wang
中科院分区：
文献类型：
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作者：
Zi-Fei Meng;Xue-Yan Cao;F. Ming;A. Zhang;Bin Wang
水下爆炸冲击波在多层结构中的传播是一个非常复杂的物理现象，涉及到剧烈的流固耦合问题。本文采用AUTODYN中的耦合欧拉-拉格朗日(CEL)方法对激波传播过程进行了数值模拟，并对FSI问题进行了求解。首先，简要介绍了CEL方法的控制方程和流体-结构界面的处理方法。然后，建立了两个水下爆炸数值模型，并将计算结果分别与经验公式和实验数据进行了比较，验证了数值解的可靠性。该方法的计算结果与经验公式和实验结果吻合较好。在此基础上，建立了水下爆炸作用下由两个半球形壳体和壳体之间充填的流体组成的多层结构的模型，从波的反射和传输两个方面分析了冲击波在多层结构中传播的压力特性。最后，研究了壳体厚度和多层结构之间充液类型对波的反射和传输的影响。
The propagation of the shock wave across multilayer structures during underwater explosion is a very complex physical phenomenon, involving violent fluid-structure interaction (FSI) problems. In this paper, the coupled Eulerian–Lagrangian (CEL) method in AUTODYN is used to simulate the process of shock wave propagation and solve FSI problems. Firstly, the governing equation and the treatment of fluid and structure interface of the CEL method are briefly reviewed. Afterwards, two underwater explosion numerical models are established, and the results are compared with the empirical formula and experimental data, respectively, to verify the reliability of numerical solutions. The results obtained by this method show good agreements with those of the empirical formula and experiment. Furthermore, the model of the multilayer structures composed of two hemispherical shells and the fluid filled between the shells subjected to underwater explosion is established, and the pressure characteristics of the shock wave propagating across the multilayer structures are analyzed regarding the wave reflection and transmission. Finally, the effects of the shell thickness and the filled fluid type among the multilayer structures on the wave reflection and transmission are studied.