Dynamic characteristics analysis and experimental research of cascade thrust reverser
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摘要:
基于反推装置工作原理，提取单链路运动机构，保留关键运动副接触状态及关键部件尺寸，设计研制反推装置模拟试验台，通过开展不同载荷工况下原理级试验项目，得到机构阻滞力及导轨刚度变化规律，同时建立含间隙碰撞的刚柔耦合反推装置非线性动力学仿真模型，完成试验仿真对比验证。结果表明：纵向加载相比于横向加载工况下，机构最大阻滞力同比增大19%，当横向载荷低于150 N时，阻滞力峰值近似线性增加，增长率约为22%；机构导轨在纵向加载下整体变形比较稳定，横向载荷影响下变化更加敏感，但随着载荷的增大，导轨的振动现象受到抑制；试验数据与仿真结果基本一致，验证了试验的合理性和模型的正确性。
Abstract:A study was conducted to investigate the dynamic characteristics of key components of a cascade thrust reverser mechanism under multiple operating conditions. Based on the working principle of the thrust reverser device, a single-linkage motion mechanism was extracted while retaining the critical contact states of the motion pairs and the dimensions of key components. A simulated test bench for the thrust reverser mechanism was designed and developed. By conducting principle-level experimental tests under different load conditions, the variation patterns of the mechanism’s block force and guide rail stiffness were obtained. Meanwhile, the nonlinear dynamic simulation model for the rigid-flexible coupled thrust reverser mechanism with clearance collisions was established. Simultaneously, comparison and verification between experimental tests and simulations were completed. The results indicated that, compared with the lateral loading condition, the maximum block force of the mechanism increased by 19% under longitudinal loading. When the lateral load was below 150 N, the peak block force showed an approximately linear increase, with a growth rate of approximately 22%. Under longitudinal loading, the overall deformation of the mechanism’s guide rail was relatively stable, while under lateral loading, the deformation was more sensitive to changes. However, as the load increased, the vibration of the guide rail was inhibited. The experimental data were in good agreement with the simulation results, confirming the validity of the experiments and the accuracy of the model.
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图 2 单链路反推装置运动示意图
Figure 2. Schematic diagram of single link thrust reverser mechanism movement
图 22 阻滞力试验与仿真结果对比
Figure 22. Comparison of experimental and simulation results of blocking force
图 23 导轨纵向变形试验与仿真结果对比
Figure 23. Comparison of experimental and simulation results of vertical deformation of guide rail
表 1 原理级试验加载方案
Table 1. Principle level test loading programme
试验项目 试验温度/℃ 横向载荷/N 纵向载荷/N 驱动速度/（mm/s） 运动周期/s 测试次数 阻滞力试验 25 50，100，150，200，250，300 50，100，150，200 312 5 3 导轨刚度试验 25 0 0 312 5 3 100 100 200 200 300 300 
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