攻角对杆状弹体入水侵彻特性影响数值分析  

Numerical analysis of influence of angle of attack on penetration characteristics of long-rod projectile entering water

作　　者：王克 侯海量[1] 李永清[1] 李典[1] WANG Ke;HOU Hai-liang;LI Yong-qing;LI Dian(Department of Naval Architecture Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学船舶与海洋学院,湖北武汉430033

出　　处：《舰船科学技术》2023年第13期6-13,共8页Ship Science and Technology

基　　金：国家自然科学基金资助项目(51979277)。

摘　　要：为探究带攻角杆状弹高速入水的侵彻特性,采用LS-DYNA中的流固耦合算法,研究不同攻角下弹体速度、长径比对弹体入水后的剩余特性、空泡形状及弹体姿态的影响。结果表明:长杆弹入水后会发生弹体姿态翻转,经过一段时间弹体姿态稳定,而攻角较小时会发生二次翻转现象;长杆弹带攻角高速入水后弹头将产生非对称的墩粗侵蚀变形、整体塑性弯曲变形及2种变形模式的耦合;长径比小的弹体其破坏能力较小,弹道偏航较小,但姿态偏转较大;长径比较大的弹体破坏能力强,弹体姿态偏转较小,但弹道偏航距离较大;长径比越大的弹体对攻角的变化越敏感。To reveal the penetration characteristics of long-rod projectile with angle of attack entering water at high velocity,fluid-structure coupling algorithm in LS-DYNA was adopted to study the influence of velocity and length-diameter ratio of projectile body at different angle of attack on residual characteristics,cavity shape and attitude of projectile body after entering water.The results show that the attitude of the long-rod projectile will turn over after it hits the water,and the attitude of the long rod will be stable after a period of time.After entering water at high speed with the angle of attack,the warhead will produce asymmetric coarse erosion deformation,integral plastic bending deformation and coupling of the two deformation modes.The projectile with small aspect ratio has smaller damage ability,smaller trajectory yaw,but larger attitude deflection.The projectile with a large aspect ratio has stronger damage ability,smaller attitude deflection,but larger trajectory yaw distance.The larger the aspect ratio is,the more sensitive the projectile is to the change of the Angle of attack.

关 键 词：攻角 长杆弹 高速入水 数值分析 

分 类 号：U663.85[交通运输工程—船舶及航道工程]