冲压空气涡轮展开过程联合仿真研究

Joint Simulation of Deployment Process for Ram Air Turbine

冲压空气涡轮系统属于飞机应急能源,收放作动装置是冲压空气涡轮系统的重要组成部分。根据收放装置的工作原理,运用LMS Virtual.lab Motion构造刚柔耦合的多体动力学模型,运用AMESim构造作动筒液压模型。将两种模型关联从而实现联合仿真,分析收放装置动态展开过程的关键部件应变,在风洞中对其进行展开试验,并使用应变片测量了关键部位的应变水平。通过计算结果与试验数据对比可以发现,该模型的计算误差在6%以内。

The ram air turbine system is used for aircraft emergency energy,the retractable device is an important component in the ram air turbine system.Its rapid、effective and safe release is prerequisite for the stability of this system.According to the working principle of the retractable device,the multi-body dynamic model with rigid flexible coupling is constructed by using LMS Virtual.lab Motion and the hydraulic model of actuating cylinder is constructed by using AMESim in this paper.Then,the two models are associated with each other in joint simulation,which is used to analyses the strain of key components during dynamic unfolding process of the retractable device.The RAT is tested in the wind tunnel,and the strain gauges are used to measure strain levels at key components.By comparing the calculated results with the experimental data,it can be found out that the computational error of the model is less than six percent.