李世海,燕琳,郭铁栓
Li Shihai;Yan Lin(Institute of Mechanics; the Chinese Academy Sciences;

• 1:中国科学院力学研究所!北京，100080
• 2:中国科学院力学研究所!北京，100080
• 3:国家地震局!北京，100036

摘要(Abstract)：

通过工程试验研究，观测到了水下爆炸引起的地基及水中结构的二次地震波现象．分析试验结果，总结了地基及结构振动的规律，指出二次振动现象与水中爆炸气泡的脉动有关。在已有水下爆炸理论基础上，通过引用等效高度的概念，借助量纲分析给出了计算群药包水下爆炸气泡脉动周期的经验公式。
By experiments, the phenomena of secondary vibration of foundation and submerged structures induced by underwater explosion were observed. By the analysis of experimental result, the vibration regularity of foundation and submerged structures was summarized. It is pointed out that the secondary vibration phenomena are related to bubble pulse with underwater explosion. Based on present underwater explosion theories, an empirical formula for calculating the bubble pulse period of underwater multi-charge explosion is given by means of the concept of equivalent height and dimensional analysis.

关键词(KeyWords)： 加密基床;水下爆炸;二次振动;气泡脉动
Densification of foundation bed; Underwater explosion; Secondary vibration; Bubble pulse

Abstract:

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基金项目(Foundation):

作者(Authors): 李世海,燕琳,郭铁栓
Li Shihai;Yan Lin(Institute of Mechanics; the Chinese Academy Sciences;

参考文献(References)：

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• 3李玉民.水中爆炸气泡脉动流场的数值计算.爆炸与冲击,1996,16(4):376—381
• 4熊代余.水下爆炸测试炸药能量方法的试验与研究.工程爆破文集.武汉:中国地质大学出版社,1993,240～245