超空泡壳结构航行体尾拍分析

Analyzing tail-slaps of shell structure of supercavitating vehicle

完善并扩展了一个尾拍计算公式,分析了射弹的转动角速度,发现角速度随时间的变化趋势并非先增大后减小,而是直接减小.研究了超空泡壳结构航行体在匀速、加速和减速情况下的尾拍,讨论了不同航速下重力加速度对匀速航行体尾拍的影响.结果表明:航行体转动角速度和冲击力的振幅随时间总趋势是减小的;对于不同航速下的匀速航行体,航速越大,转动角速度和冲击力的振幅越大;重力加速度对高速超空泡航行体的尾拍影响很小.

An equation of tail-slaps was perfected, the angular velocity of a projectile was analyzed. The magnitude of the angular velocity was thought to increase initially, and then decrease gradually with time. In fact, it could be found that the magnitude of the angular velocity always decreased. The tail-slaps of the shell structure of a supercavitating vehicle with uniform, retarded and accelerated motion were researched, and the influences of gravity acceleration on tail-slaps of a vehicle with uniform motion at different speeds were discussed. The computation results show that the general trends of the magnitudes of the angular velocity and impact force with time are downward in the three kines- tates. The higher speed a vehicle with uniform motion has, the larger the magnitudes will be. The effect of gravity acceleration on the tail-slaps of a high-speed supercavitating vehicle is slight.