舰船摇摆下舰载火箭弹初始扰动可能域研究

Research on presumable range of initial disturbances of ship-borne rocket under ship swaying motion

舰船摇摆产生的过载将对舰载火箭弹的初始扰动产生影响。初始扰动是影响舰载火箭弹密集度水平的主要因素,但却无法由现有的试验水平测得。本文采用有限幅值随机激励仿真的方法,同时考虑舰船的横摇和纵摇运动,得到了不同安装位置下舰船摇摆引起的初始扰动可能域。仿真结果表明,横摇对初始扰动的影响大于纵摇对初始扰动的影响,但二者引起的初始扰动量级相同,因此对安装位置不在舰船横轴或纵轴上的舰载火箭弹的初始扰动进行计算时必须考虑舰船的纵摇运动。

The overload on a ship-borne rocket excited by ship swaying motion affects the initial disturbances. The initial disturbances is the main factor which affects dispersion level of ship-borne rockets but can not be measured by the present level of experiment. In this paper, the total presumable range of initial disturbances under different installation locations is calculated when both rolling and pitch motions of ship are simultaneously considered. The simulation results show that the roiling motion has more influence on initial disturbances in comparison of pitch motion, but both have a same magnitude. Therefore, when the location of launcher is not on lateral or longitudinal axis of ship, the pitch motion of ship must be considered in calculating initial disturbances of ship-borne rockets.