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针对抛索火箭系统主动段绳索复杂的动力学特性,建立了基于多体动力学方法的绳索模型;数值仿真了真实火箭推力作用下绳索主动段飞行动力学过程及其动态特性。研究结果表明:主动段绳索运动呈波动状态,绳索速度和绳索内张力呈现规律性波动,随着编号增加,速度波动幅度先增大后减小,绳索内张力波动的幅度和大幅波动持续时间先减小后增大,绳段最大速度达到325.42 m/s,绳段内张力的峰值达到了8 162.5 N。仿真计算结果与试验数据较一致,该研究成果对抛索火箭系统绳索选择和系统弹道设计有参考价值。
Aiming at the complicated dynamic characteristics of the ropes of active rocket system, a rope model based on multi-body dynamics is established. The dynamics and dynamics of ropes’ active section are numerically simulated. The results show that the rope movement in the active section fluctuates and the rope speed and the tension in the rope exhibit regular fluctuations. As the serial number increases, the amplitude of the fluctuation firstly increases and then decreases. The amplitude of the tension fluctuation and the duration of the large fluctuation After decreasing, the maximum velocity of the rope reached 325.42 m / s and the peak tension in the rope reached 8 162.5 N. The simulation results are in good agreement with the experimental data. The research results have reference value for the selection of ropes and the system ballistic design of the rocket system.