弹体结构变形对发射起始扰动影响研究

Study on Effect of the Projectile Body's Structural Deformation to Launching Initial Disturbance

对长细比较大的倾斜发射式火箭弹,在进行发射动力学计算时,除考虑外部影响因素外,还应该考虑火箭弹弹体自身的弹性变形引起的横向振动对起始扰动的影响。为了研究某型火箭弹的横向振动特性对发射过程俯仰角运动的影响,采用传递矩阵法建立了火箭弹的横向振动模型,分别进行了多刚体和刚柔耦合发射动力学仿真。通过发射动力学仿真结果及试验测试结果对比,发现弹体的横向振动特性对该火箭弹发射过程中俯仰角方向运动具有比较大的影响。

To build the launching dynamic model of the inclined launching rocket projectile which has large slenderness ratio, in addition to considering the impact of external factors, the effect of transverse vibration on initial disturbance caused by the elastic deformation of the rocket projectile body needed to be considered as well. To study the effect of crosswise vibration characteristic on motion of pitch angle in launching progress, a rocket projectile ＊ s transverse vibration model was built using transfer matrix method and multi-rigid-body dynamics simulation and multi-rigid-flexible-body dynamics simulation were conducted. By comparing the simulation results with the test results, it was found that the projectile body＊ s structural deformation had apparent effect on pitch angle motion in launching progress.