Abstract The near-field underwater explosion poses a great threaten to marine ships by introducing both local and overall damage on their hull structures. In this paper, a series of near-field underwater explosion experiments were carried out on the mimic steel hull structures to investigate the effects of the standoff distance on their dynamic behavior. Special attention was paid on their deformation process and failure modes. After that, a fluid-solid coupling algorithm was implemented in establishing a finite element (FE) model to simulate dynamic response of the hull structures under a near-field underwater explosion. The numerical results showed a good agreement with the experimental data. A standoff distance threshold was found to result in the maximum structural deformation. The deformation magnitude was monotonically decreased by either increasing or decreasing the standoff distance from the threshold value.

中文翻译：

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间隔距离对近场水下爆炸作用下船体结构损伤的影响

摘要 近场水下爆炸对船舶的船体结构造成局部和整体损伤，对船舶构成巨大威胁。本文在模拟钢船体结构上进行了一系列近场水下爆炸实验，以研究间隔距离对其动力行为的影响。特别注意它们的变形过程和失效模式。之后，采用流固耦合算法建立有限元（FE）模型，模拟近场水下爆炸下船体结构的动力响应。数值结果与实验数据吻合良好。发现间隔距离阈值会导致最大的结构变形。