水下爆炸气泡运动对水面形态影响的数值模拟

为了研究水下爆炸气泡运动对水面形态的影响,使用LS-DYNA软件,基于ALE算法,建立了水下爆炸气泡运动模型,讨论了不同装药水深距离参数条件下,不同类型水冢的形成过程及其特性、气泡运动特性和产生的水面波动特征。结果表明:在水下爆炸过程中,随水深距离参数的增大,水下爆炸形成的水冢类型依次为零碎型、飞溅型、酒杯型、皇冠型;同时爆炸产生的气泡最大半径也是随着水深的增大而减小,气泡脉动周期则相反;水面波动的特征主要与水冢的形成过程密切相关,不同类型的水冢所产生的水面兴波的机理不同。

Numerical simulation of the influence of bubble movement on water surface morphology in underwater explosion

In order to study the influence of underwater explosion bubble movement on water surface morphology, an underwater explosion bubble motion model was established by using the LS-DYNA software based on the ALE algorithm, and the formation process and characteristics of different types of water mounds, the bubble movement characteristics and the resulting water surface fluctuation characteristics under different charge depths are discussed. The results show that in the process of underwater explosion, with the increase of underwater distance, the types of water mounds formed by underwater explosions are changing from fragmentary type, splash type, wine cup type, to crown type. At the same time, the maximum radius of the bubble generated by explosion decreases with the increase of the underwater distance, while the bubble pulsation period is the opposite. The characteristics of water surface fluctuations are mainly related to the formation process of water mounds, and different types of water mounds have different mechanisms for explosion generation of water waves.