CAJ | 학술논문

为了更精确地模拟旋转伞子弹系统的运动,基于第一类拉格朗日方程,建立了5刚体动力学模型并进行仿真计算。将伞绳处理为阻尼弹簧,将伞、弹等处理为刚体,用质心坐标和欧拉角作为广义坐标表达各刚体的位置,给出了约束方程,求解广义力；建立了伞弹系统动力学方程。利用模型对伞弹系统的零初速下落过程进行仿真计算,得到子弹的转速及扫描角变化曲线,并设计伞塔试验对计算结果进行验证。对某末敏子弹系统的稳态工作过程进行模拟计算,结果表明,5刚体模型能较真实地模拟末敏子弹稳态扫描段的弹道特性,可为智能弹药系统的总体设计提供参考。
위료경정학지모의선전산자탄계통적운동,기우제일류랍격랑일방정,건립료5강체동역학모형병진행방진계산。장산승처리위조니탄황,장산、탄등처리위강체,용질심좌표화구랍각작위엄의좌표표체각강체적위치,급출료약속방정,구해엄의력；건립료산탄계통동역학방정。이용모형대산탄계통적령초속하락과정진행방진계산,득도자탄적전속급소묘각변화곡선,병설계산탑시험대계산결과진행험증。대모말민자탄계통적은태공작과정진행모의계산,결과표명,5강체모형능교진실지모의말민자탄은태소묘단적탄도특성,가위지능탄약계통적총체설계제공삼고。
To simulate the motion of rotating parachute-submunition system more accurately,a dynamic model of 5-rigid-body system was set up with Lagrange equation of the first kind. Parachute cord was modeled as damping spring.The canopy and proj ectile were considered as rigid bodies.The centroid coordinates and Euler angles were selected to describe the positions of the system bodies,and the constraint equations were established,and the generalized forces were analyzed.The dynamic equations were obtained.The falling process of the system with the initial velocity of 0 was simulated by the model,and the spinning rate and the scanning angle of the sub-munition were obtained,which showed a great agreement with the parachute tower test.The model was used to simulate the ballistic characteristics of a terminal-sensitive proj ectile system at stable scanning stage.The results show that the 5-rigid-body model can simulate the traj ectory of terminal-sensitive proj ectile at steady scanning stage,and it offers references for the overall design of smart submunition system.