鱼雷近场爆炸复杂载荷及对舰船毁伤模式

doi:10.3969/j.issn.1000-1093.2021.04.018

摘要/Abstract

摘要： 为科学评估鱼雷水下爆炸对舰船毁伤效能，基于非线性显式动力学分析软件LS-DYNA建立近边界水下爆炸数值分析模型。将近自由液面边界条件下的爆炸载荷计算结果与文献［6］经验公式及文献［17］试验结果对比，验证所建立的数值模拟方法能较好地反映近场水下爆炸的冲击波压力及多次气泡脉动过程。利用该技术构建与实战边界条件贴近的数值仿真模型，计算并分析多工况下鱼雷近场爆炸对舰船的毁伤模式。研究结果表明：近场不同边界条件对水下爆炸气泡脉动载荷具有重要影响；不同工况下冲击波、气泡脉动及水射流载荷与舰船结构存在复杂的耦合作用；鱼雷在近场不同工况下对舰船的作用展现出了不同的能量输出结构，与舰船最终的毁伤模式密切相关，且存在最优爆距使鱼雷作用于舰船的总能量最大。

关键词: 鱼雷, 水下爆炸, 近场边界, 流体与固体耦合, 毁伤评估

Abstract: A numerical analysis model of near-boundary underwater explosion was established based on nonlinear explicit dynamic analysis software LS-DYNA in order to evaluate the damage efficiency of torpedo underwater explosion to ships. The calculated results of explosion load under near-free liquid surface boundary conditions were compared with the calculated results of empirical formulas in Ref.［6］ and the experimental results in Ref.［17］, verifying that the proposed numerical simulation method can well reflect the shock wave pressure of the near-field underwater explosion and the multiple bubble pulsation processes. The technology is used to build a numerical simulation model close to the actual combat boundary conditions, and calculate and analyze the damage mode of the torpedo near-field explosion to the ship under multiple conditions. The results show that different boundary conditions in the near field have an important effect on the pulsating load of underwater explosion bubbles. Under different conditions, shock wave, bubble pulsation and water jet load have complex coupling effects with ship structure. The effect of torpedo on the ship in the near field under different conditions shows different energy output structures, which is closely related to the final damage mode of ship, and there is an optimal detonation distance to maximize the total energy of torpedo acting on the ship.

Key words: torpedo, underwaterexplosion, nearfieldboundary, fluid-structureinteraction, damageassessment

中图分类号:

刘文思，陆越，周庆飞，程素秋. 鱼雷近场爆炸复杂载荷及对舰船毁伤模式[J]. 兵工学报, 2021, 42(4): 842-850.

LIU Wensi, LU Yue, ZHOU Qingfei, CHENG Suqiu. Complex Load of Torpedo Near-field Explosion and Its Damage Mode to Ships[J]. Acta Armamentarii, 2021, 42(4): 842-850.

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