近自由面水下爆炸气泡与结构相互作用数值计算研究

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摘要近自由面水下爆炸气泡在自由面与结构共同作用下会呈现出非常复杂的运动特性，利用体积加速度模型确定气泡运动的初始半径及速度，针对流场特点，通过自行开发的子程序实现了流场初始条件与边界条件的定义，基于MSC.DYTRAN有限元软件的流-固耦合处理方法对近水面水下爆炸气泡与结构相互作用全过程进行数值模拟，通过与现有实验数据的对比，验证有限元模型建立和子程序开发的正确性。以此为基础，研究气泡与自由面、气泡与结构的距离以及结构初始角度等参数对气泡运动特性、射流角度、射流速度的影响规律，计算模型、方法及结果对相关的工程研究和计算具有一定参考价值。

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	李健1
	潘力1
	林贤坤1
	荣吉利2
	项大林2

关键词 ：水下爆炸, 气泡脉动, 近自由面, 近刚性面, 射流

Abstract：From the complex phenomenon of the interaction between bubble and structure near free surface in underwater explosion. Volume-acceleration model was introduced to determine the initial condition for bubble. Subroutines defined the initial value and boundary conditions of fluid field were developed by using MSC.DYTRAN finite element analysis software. The dynamic behavior of bubble near free surface and structure including jet of bubble and dome of free surface was simulated and analyzed. The computational result of the behavior of bubble was compared with the experimental results.. The interactions between bubble and structure were studied systematically and summarized. Relative law show that the dynamic behaviors of bubbles have close relation with distance parameter and initial angle of structure. The research has value to correlative theory research and engineering calculation.

Key words： underwater explosion bubble pulse near free surface near rigid wall jet

收稿日期: 2014-07-04 出版日期: 2015-09-25

引用本文:

李健1，潘力1，林贤坤1，荣吉利2，项大林2. 近自由面水下爆炸气泡与结构相互作用数值计算研究[J]. 振动与冲击, 2015, 34(18): 13-18.
Lijian1, Panli1, Lin Xiankun1, Rong Jili2,Xiang Dalin2. NUMERICAL STUDY OF INTERACTION BETWEEN BUBBLE AND STRUCTURE NEAR FREE SURFACE IN UNDERWATER EXPLOSION. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(18): 13-18.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I18/13

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