Research on Reliability Optimization Design of Engine Reverse Thrust Mechanism
According to the configuration and working condition of thrust reverse mechanism,the theoretical model of kinematics of the thrust reverse mechanism is established.Through the kinematics simulation,the rationality and correctness of the established model are verified.Considering that the blocker door needs to be as stable as possible in the whole deflection process,the maximum angular acceleration of the blocker door in the whole deflection process is taken as the optimization goal of the thrust reverser mechanism,and each motion mechanism of the device meets the geometric relationship as the constraint condition,and the deterministic optimization model of the thrust reverser mechanism is established.At the same time,considering the two failure modes of the reverse mechanism,reliability is considered in the optimization design,and a reliability-based design optimization model is established.The optimal design calculation of the thrust reverser mechanism is carried out in Matlab.The results show that the angular acceleration of the blocker door in the whole movement process is further optimized under the condition of meeting the reliability constraints,and the whole mechanism does not interfere in the movement,and the whole thrust reverser device can work normally.The modeling process and reliability-based design optimization method in the paper can provide reference for the structural design of the thrust reverse mechanism.
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