反推力装置运动学与动力学仿真

Kinematics and dynamics simulation of thrust reverser

为了研究叶栅式反推力装置各部件在工作过程中的运动学与动力学特性,根据机构运动原理对反推力装置进行简化并建立了运动学与动力学数学模型。以滑动整流罩位移与阻流门所受气动负荷为输入进行运动学与动力学仿真,得到了反推力装置各部件的位移、速度及受力特性曲线,并对比分析了在不同尺寸参数下各部件特征点的运动轨迹和反推力装置负载力变化。结果表明:运动学及动力学仿真结果与工程实际相符;反推力装置机构参数选择不合理时,各设计点会发生干涉现象并导致机构无法运动;机构参数变化对负载力最大值影响尤为突出,在阻流门AC段长度值增大6%,阻流门CB段长度值减小9%的情况下,负载力正向最大值将增大19.53%,负向最大值增大12.67%。研究方法及研究结果可为反推力装置运动学及动力学分析,以及为反推力装置机构优化设计提供参考。

In order to study the kinematics and dynamics characteristics of cascade type thrust reverser,the mechanism was simplified and the kinematics and dynamics mathematical model of thrust reverser was established according to the motion principle.Taking displacement of translating sleeve and pneumatic load of blocker door as the input,the displacement,velocity and force characteristic of thrust reverser were simulated,and the trajectory of feature points and the thrust reverser load force under different size parameters were comparatively analyzed.The results showed that:the kinematics and dynamics simulation results were in conformity with the real working process.When the mechanism parameters of thrust reverser were selected unreasonably,the interference phenomenon occurred between components.The change of components parameters had a remarkable influence on the maximum load force;when the length of the ACsegment of blocker door increased by 6%and the CB segment decreased by 9%,the positive maximum load force increased by 19.53% and the negative maximum load force increased by 12.67%.The model and research results can provide a reference for the kinematics and dynamics analysis and optimization design of the thrust reverser structure.