高速破片入水镦粗变形及侵彻特性有限元分析  

Finite element analysis of underwater high velocity fragment mushrooming and penetration properties

作　　者：沈晓乐[1] 朱锡[2] 侯海量[2] 周学滨[1] 赵红光[1] 

机构地区：[1]中国人民解放军91439部队 [2]海军工程大学船舶与动力学院

出　　处：《舰船科学技术》2012年第7期25-29,共5页Ship Science and Technology

摘　　要：为研究水下接触爆炸产生的高速破片在水中侵彻的阻力特性,采用有限元对典型高速破片入水侵彻过程进行了模拟,计算了破片侵彻的阻力系数,分析了破片墩粗变形规律及其对侵彻阻力的影响,提出了考虑墩粗变形影响的高速破片侵彻阻力及速度计算公式,指出了高速破片的侵彻能力随速度的变化规律。结果表明,初速度大于969～1 187 m/s时破片头部将产生显著变形,并大大影响其侵彻阻力;当破片速度较小时,入水侵彻深度随初始弹速的增大而增大,当破片速度达到某一临界值以后,侵彻深度将随初始入射速度的增大而逐渐减小。In order to explore the under water resistance of high velocity fragment produced by under water contact explosion.Finite element analysis was carried out to simulate the process of high velocity fragment penetrating water.The resistance coefficient was found out.the mushrooming rule due to high velocity and its influence on the penetration resistance ware discussed.The penetration resistance and velocity formulas which sufficiently considering the affect of altering in front face were brought forward.rule of penetrate capacity according the velocity change was also pointed out.Results indicate as follows： Initial velocity excess 969 ～ 1187 m / s,the mushrooming was definite,it will affect the resistance sufficiently. When the initial velocity is low,the penetrate depth will increase with initial velocity,when the fragment velocity achieve to some critical value,the penetrate depth will decrease with initial velocity increase.

关 键 词：爆炸力学 高速破片 侵彻 防护水舱 侵彻阻力 

分 类 号：O353.4[理学—流体力学]