水下爆炸作用圆柱壳的冲击波绕射效应及水域压力分布研究
Study on Shock Wave Diffraction Effect of Cylindrical Shell and Pressure Distribution in Water Area under Underwater Explosion
吴高迪 1刘斌 2孙占忠 3雷加静 3吴卫国2
作者信息
- 1. 武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心 武汉 430063;武汉理工大学船海与能源动力工程学院 武汉 430063
- 2. 武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心 武汉 430063
- 3. 中国舰船研究设计中心 武汉 430064
- 折叠
摘要
文中采用流固耦合数值方法计算了无反射、刚性和弹性圆柱壳在200 kg药量TNT炸药爆炸冲击波作用下水域流场压力的变化,分析了冲击波延圆柱壳的绕射现象,得出了圆柱壳附近水域压力场的变化规律.通过数值计算分析了绕射波的入射冲击波、反射冲击波、衍射波和辐射波组成;辐射波主要由结构的变形和振动引起;压力汇聚点位置,压力峰值与结构相对刚度有关;空化发生时间、产生的压力同样与结构相对刚度有关.
Abstract
The fluid-solid coupling numerical method was used to calculate the pressure change of the non-reflective,rigid and elastic cylindrical shell under the explosion shock wave of 200kg TNT explo-sive.The diffraction phenomenon of shock wave along cylindrical shell was analyzed,and the variation law of pressure field in the water near cylindrical shell was obtained.The composition of incident shock wave,reflected shock wave,diffracted wave and radiation wave of diffracted wave was analyzed by numerical calculation.The results show that radiation waves are mainly caused by structural de-formation and vibration.The location of pressure convergence point and peak pressure are related to the relative stiffness of the structure.The time of cavitation and the pressure generated are also relat-ed to the relative stiffness of the structure.
关键词
水下爆炸/冲击波/圆柱壳/绕射压力Key words
underwater explosion/shock waves/cylindrical shell/diffracted pressure引用本文复制引用
基金项目
国家自然科学基金(52271326)
中央高校基本科研业务费专项资金(2021Ⅲ011XZ)
出版年
2024
NETL
NSTL
万方数据