大口径平顶弹体击水动力学方程研究  

Study on Dynamic Equation of Water Entry of Large-caliber Flat-top Projectile

作　　者：汪振 吴茂林[1] 戴文留 孙玉松[1] 陆泽平 WANG Zhen;WU Maolin;DAI Wenliu;SUN Yusong;LU Zeping(College of Arms Engineering,Navy University of Engineering,Wuhan 430033,China;The First Military Representative Office of Naval Equipment Department in Shanghai,Shanghai 201913,China;Jiangnan Industrial Group Co.,Ltd.,Xiangtan 411207,China)

机构地区：[1]海军工程大学兵器工程学院,湖北武汉430033 [2]海军装备部驻上海地区第一军事代表室,上海201913 [3]江南工业集团有限公司,湖南湘潭411207

出　　处：《弹道学报》2020年第3期41-49,共9页Journal of Ballistics

摘　　要：针对大口径平顶弹体高速入水时,弹体击水运动过程中弹体与水之间的能量转化以及运动状态变化的问题,基于动量定理与动量矩定理,通过简化弹体击水模型,进行坐标变换及数学推导,得出了平顶弹体击水三自由度方程组。计算了大口径平顶弹体击水瞬间的动力学响应。基于Matlab/Simulink模块编写软件进行了算例分析,得到了弹体击水过程中速度、轴向载荷、径向载荷以及力矩变化。结果表明,该方法可以为水中兵器强度设计,以及入水载荷问题的研究提供一种物理模型,并为后续研究此类问题提供参考。While the large-caliber flat-top projectile enters water at high speed,the energy conversion between the projectile and the water and the changes of motion state are extremely complicated during the movement of projectile impacting water.Based on the momentum theorem and the momentum moment theorem,the three-degree-of-freedom equations of the flat-top projectile were obtained by simplifying the impacting-water model,coordinate transformation and mathematical derivation.The dynamic response of the large-diameter flat-top projectile was calculated.Based on Matlab/Simulink module,software was customized,and a case study was carried out.The variations of velocity,axial load,radial load and torque in the impacting-water process were obtained.The method can provide a physical model for the strength design of underwater weapons and the research of water entry load,and it provides some reference for future research on such problems.

关 键 词：平顶弹体 入水弹道 动量定理 

分 类 号：TJ67[兵器科学与技术—武器系统与运用工程]