海洋环境下舰载固体火箭发动机运动模型

Model of Shipborne Solid Rocket Motor Motion in Marine Environment

通过分析海洋环境下的海浪特性,利用波能谱理论计算得到了一定海情下海浪波高随时间变化曲线。在此基础上,通过切片理论建立了舰船运动模型,并通过实测数据对模型精度进行了验证。利用该模型对舰船遭遇7级风浪、以航速14节和航向角135度在海上航行时的舰船运动进行了仿真计算。计算表明,这时舰船的横摇幅值要大于纵摇幅值,而横摇频率低于纵摇频率。通过推导舰载导弹发动机和舰船的坐标系转换矩阵,计算分析了舰载导弹的运动规律,结果表明在随船移动平衡坐标系下,舰载导弹沿x轴和y轴方向运动幅值小,而沿z轴方向运动幅值较大。

According to analyzing the identity of ocean wave, theory of wave energy spectrum was applied to compute the curve of wave elevation vs. time in some sea state. The model of ship motion was established by strip theory of the ship. The precision of the model was validated by real measure data. The ship motion was researched under the case that sea state is 7, the speed of the ship is 14 knots and the degree of abaft the beam is 135. The results show that the amplitude of roll is more than that of pitch in the presupposition situation, but the frequency of roll is smaller than that of pitch. According to investigating the relation of different coordinate systems, the law of shipborne solid rocket motor motion was found. The results show that in the consistent coordinate system, the motion amplitude of shipbome solid rocket motor is small in direction ofx and y and large in direction ofz.