This paper is concerned with predicting the nonlinear response of submerged structures to pressure shock waves from underwater explosion (UNDEX) using a novel numerical simulation scheme. Apart from examining the nature of the effects of UNDEX, existing numerical simulation approaches to handle such problems are also critically evaluated. The proposed numerical scheme involves coupling the structural explicit finite element solver Abaqus/Explicit™ with the Lattice-Boltzmann CFD solver XFlow™. Abaqus Co-simulation Engine (CSE) is used to run the solvers as a single, efficient and a sequentially run‐time coupled Fluid-Structure Interaction (FSI) analysis. Actual experimental benchmark test data is used to successfully validate the numerical predictions of the proposed scheme and additional insight into the response of tubular structures to pressure shock waves due to UNDEX is realized. The superior performance of the proposed scheme as compared to the existing ones makes it an attractive choice for numerical simulation of real-life UNDEX problems.

本文涉及使用新型数值模拟方案预测水下结构对水下爆炸 (UNDEX) 压力冲击波的非线性响应。除了检查 UNDEX 影响的性质外，还对处理此类问题的现有数值模拟方法进行了严格评估。提议的数值方案包括将结构显式有限元求解器 Abaqus/Explicit™ 与 Lattice-Boltzmann CFD 求解器 XFlow™ 耦合。Abaqus 联合仿真引擎 (CSE) 用于将求解器作为单一、高效和顺序运行的流固耦合 (FSI) 分析运行。实际实验基准测试数据用于成功验证所提出方案的数值预测，并实现了对管状结构对 UNDEX 引起的压力冲击波的响应的进一步了解。与现有方案相比，所提出方案的优越性能使其成为现实生活中 UNDEX 问题数值模拟的一个有吸引力的选择。