According to existing similarity method, similarity relationship between bubbles induced by spark and underwater explosion is presented in this paper based on the modified Rayleigh model. Kinematic and load similarity of bubbles with different sizes and under different conditions is obtained, as well as other parameters such as radius change of bubbles, migration value and jet velocity are discussed. Furthermore, dynamic characteristics of a bubble near hull structure are studied when the bubble is coupled with the structural boundary. It is feasible for a bubble induced by electrical spark to be used to simulate the underwater explosion bubble. The experimental results can be applied in engineering researches, which makes this research valuable.%在相似方法的基础上,基于修正的Rayleigh模型,描述水下电火花放电气泡(小尺度气泡)与真实的水下爆炸气泡(大尺度气泡)之间的相似关系.总结不同工况下不同尺度气泡运动及其载荷的相似规律,包括气泡半径的变化、迁移量以及射流速度等特征量.在此基础上,将水中气泡与复杂的舰船边界耦合,研究舰船附近气泡的动态特征.研究表明,基于相似性理论可有效地用电火花气泡模拟水下爆炸气泡,可将机理性试验的结果拓展到应用研究中.
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