摘要
首先对潜射导弹出水过程进行动力学和运动学建模,随后基于Zwart-Gerber-Belamri空化模型,对带空泡的潜射导弹水动力学特性进行了数值计算研究。最后,依据以上动力学和运动学模型,对波浪扰动作用下,潜射导弹带空泡出水弹道及弹体姿态进行了数值仿真。结果显示,零攻角出水时,导弹轴向力系数随弹体空化扩大显著增加,压心后移;有攻角出水时,弹体法向力系数增量随攻角增加呈现先增大后减小的趋势。空化使潜射导弹出水速度降低约10%,出水时间延长约12%,导弹受波浪扰动程度增加约6%~7%。
Firstly, dynamics and kinematics model is built. Then, based on Zwart-Gerber-Belamri cavitation model, the characteristics of water dynamics of submarine-launched missile with cavitation are numerically calculated. Finally, trajectory and projectile attitude of water-exit course of missile under wave disturbance is numerically simulated. The result indicates that coefficient of axial force of missile with zero attack angle is obviously increased with expansion of cavitation, and the center of pressure moves backward. In water-exit course with attack angle, the increment of coefficient of normal force of missile shows a trend of decrease after the first increase with increase of attack angle. Due to cavitation, the water-exit speed of missile is decreased about 10%. The time of water-exit course is extended by 12% because of cavitation. The wave disturbance of missile is increased about 6% to 7%.
作者
张重先
李向林
刘玉秋
ZHANG Chong-xian LI Xiang-lin LIU Yu-qiu(Beijing Institute of Electronic System Engineering,Beijing 100554, China)
出处
《现代防御技术》
北大核心
2017年第1期44-49,共6页
Modern Defence Technology
关键词
潜射导弹
空化
动力学特性
出水弹道
数值仿真
水动力
submarine-launched missile
cavitation
dynamic characteristic
waterexit trajectory
numerical simulation
hydrodynamic force
