摘要
探讨了浅层水中冲击波的切断现象。主要分析了切断现象的特性、产生的机理以及对冲击波参数的影响。实验并分析了水面切断现象起始、终止时间及切断线的斜率等表征切断现象特性的参量。统计分析了水面切断现象对正压作用时间、比冲量等冲击波参数的影响。结合理论和实验数据 ,分析了有两类切断现象的波形 ,对其性质进行了判断。探讨了冲击波在水底反射产生稀疏波的机理 ,简析了水底稀疏波对波形的影响。研究表明 :装药浅层水中爆炸 ,界面对激波的削弱影响中 ,水面反射切断现象作用较强 。
In order to verifying the influences of cutoff on shock waves. Some experimental researches and analyses have been done. It mainly discusses the phenomena' characteristics, mechanism, and its influences on parameters of shock waves. The parameters such as the starting and ending time and the slope of cutoff curves are researched and analyzed by experimental methods. Some analyses are made by static methods on the influences of the cutoff on positive time, impulsion and so on. Combining with theories and measurement data. Curves analyzes has been done with two kinds of cutoff, and their properties are judged. The mechanism of expansion waves reflected form basin bottom is discussed, and its influences on shock waves are analyzed. The researches indicates that the weaken effects of the interface in shallow-layer water represented as cutoff by water surface and basin bottom. The effects of the former were strong and the latter are weak.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2002年第3期221-228,共8页
Explosion and Shock Waves
基金
总装备部科研项目
