末敏弹减速伞充气过程有限元方法研究

Research on Drag Parachute Inflation Process of Target-sensitivity Projectile Based on Finite Element Method

基于有限元方法建立减速伞充气模型。针对末敏弹减速装置采用的平面圆伞,利用粒子-弹簧系统构建减速伞三维模型;考虑了伞衣结构内力和内部气流运动基础上,建立充气过程的粒子节点动力学模型,并验证此模型与实验结果基本一致。该方法具有对物理试验依赖性小的特点,适合新型末敏弹减速伞的初步设计。

A model during inflation process was established for drag parachute based on finite element method. Aiming at the plane circular parachute adopted by the reduction gear of target-sensitivity projectile （TSP）, the particle spring system was used to construct the 3D model of drag parachute. On the basis of considering the inner force in the canopy and the flow field inside it, the dynamics models during inflation process was built in the form of mass particles, and numerical results calculate these models are validated to be in basic agreement with experiment＇s results. This method has the characteristics of depending on a few real experiments, so it adapts to be used for an elementary design in the drag parachute of new TSP.