不同土壤硬度对火箭炮发射初始扰动的影响研究

武器系统发射时的初始扰动对于射击精度的影响至关重要,为了研究火箭炮发射时土壤硬度对于发射初始扰动的影响规律,提高火箭炮射击精度,利用多刚体动力学、多柔体动力学理论及土壤本构模型,建立刚柔耦合火箭炮发射动力学模型。该模型充分考虑了土壤刚度、粘聚力及内摩擦角等关键参数对于火箭炮振动特性的响应影响,由刚柔耦合模型计算了燃气流冲击下火箭炮支腿的受力特性及炮口响应,并进行实验验证,最终研究了几种不同硬度土壤对火箭炮初始扰动的影响规律。该计算方法为土基发射武器的动力学计算提供了重要的参考。

Research on the Influence of Different Soil Hardnesses on the Initial Perturbation of Rocket Launching

The initial perturbation of the weapon system during launch is critical to the firing accuracy.In order to study the effect of soil hardness on the initial perturbation at the time of firing of a rocket launcher and to improve the firing accuracy of the rocket launcher,multi-rigid body dynamics,the theory of multi-rigid body dynamics,multi-flexible body dynamics and soil constitutive model are used to develop a rigid-flexible coupling rocket launching dynamics model,which fully considers the response effects of key parameters such as soil stiffness,cohesion and internal friction angle on the vibration characteristics of the rocket,and the gas flow impact is calculated from the rigid-flexible coupling model.The mechanical characteristics and muzzle response of the lower rocket launcher legs were tested and verified.Finally,the influence of several different soil hardnesses on the initial disturbance of the rocket launcher was studied.The calculation method provides an important reference for the dynamics calculation of soil-based launching weapons.