Abstract The objective of this study is to investigate the damage characteristics response of the ice sheet and reveal the mechanism of ice-breaking subjected to the underwater explosion. The Arbitrary-Lagrangian–Eulerian (ALE) algorithm for the fluid–structure-interaction issue of the LS-DYNA software was adopted. The efficiency and accuracy of the underwater explosion material and numerical model were studied. Besides, the reliability of the numerical model for ice-breaking subjected to the underwater explosion was validated further by comparing it with the experiment test. Then, the damage characteristics and dynamic response of the ice sheet suffering from underwater explosion load are investigated. Besides, the shock pressure propagating characteristics and bubble dynamics were analyzed. The results show that the shock wave can cause the ice sheet initial damage to the ice sheet, and the bubble movement and water jet have significance on ice fractured and crushed. Then the effects of the main factors affecting the efficiency ice-breaking subjected to the underwater explosion were investigated and discussed. A predicted formula for damage area is put forward, which can be available for guiding engineering ice-breaking underwater blast.

中文翻译：

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水下爆炸载荷作用下冰盖损伤特性的试验与数值联合研究

摘要 本研究旨在研究冰盖的损伤特性响应，揭示水下爆炸破冰机制。LS-DYNA 软件的流固耦合问题采用了任意拉格朗日-欧拉 (ALE) 算法。研究了水下爆炸材料和数值模型的效率和精度。此外，通过与实验试验的对比，进一步验证了水下爆炸破冰数值模型的可靠性。然后，研究了水下爆炸载荷作用下冰盖的损伤特性和动力响应。此外，还分析了冲击压力的传播特性和气泡动力学。结果表明，冲击波可引起冰盖对冰盖的初始破坏，气泡运动和水射流对冰的破裂和破碎具有重要意义。然后对影响水下爆炸破冰效率的主要因素进行了研究和讨论。提出了破坏面积预测公式，可用于指导工程破冰水下爆破。