随机载荷下随机参数超空泡射弹的动力稳定性  

Dynamic Stability of Supercaviting Projectile with Stochastic Parameters Subject to Random Load

作　　者：刘明[1] 安伟光 宋向华 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001

出　　处：《计算机仿真》2012年第10期55-58,共4页Computer Simulation

摘　　要：针对超空泡射弹水下高速运动时前端受轴向随机载荷作用,存在动力系统不稳定性问题。为了优化控制,建立超空泡射弹结构的动力偏微分方程,考虑结构的参数具有随机性,应用随机因子法求出随机参数射弹结构的动力不稳定区域边界,利用Bolotin方法对动力稳定性进行数值计算,求解随机变量数字特征的代数综合法,推导出了动力不稳定区域边界的均值和方差,数值计算表明,随机参数对射弹动力不稳定区域边界有一定的影响,计算结果可为超空泡射弹的设计提供一定的理论依据。Aim at the dynamic stability problems that the head of supercavitating projectile subjects to the axial random load at high speed motion underwater,the dynamic partial differential equation of supercavitating projectile structure was established.Then the numerical calculation for the dynamic stability of supercavitating structure was performed with Bolotin method.In consideration of the stochastic parameters,the regions of dynamic instability of projectile with stochastic parameters were constructed based on the random factor method,and the mean value and the variance of the boundary of dynamic instable regions were then derived by using the random variable＇s algebra synthesis method.The computational results indicate that the stochastic parameters have certain influence on the boundary of dynamic instable regions.The results provide a certain theoretical foundation for the design of supercavitating projectile.

关 键 词：超空泡射弹 随机参数 动力稳定性 随机因子法 

分 类 号：TJ01[兵器科学与技术—兵器发射理论与技术]