发动机反推运动机构可靠性优化设计研究OA
Research on Reliability Optimization Design of Engine Reverse Thrust Mechanism
反推装置作为现代民用飞机必不可少的减速系统,承担着飞机降落的重要任务,对飞机的安全飞行至关重要.根据叶栅式反推装置构型及其工作原理,本文建立了反推机构运动学理论模型.通过机构运动学仿真,验证了所建立模型的合理性与正确性.将阻流门在整个偏转过程中的最大角加速度作为优化目标,各部件满足几何运动关系作为约束条件,建立反推运动机构的确定性优化模型.与此同时,考虑反推运动机构的两种失效模式,将可靠性考虑到优化设计中,建立可靠性优化设计模型.在Matlab环境下对反推机构进行优化设计计算,结果表明,在满足可靠性约束的情况下,阻流门在整个运动过程中的角加速度得到了进一步的优化,且整个机构在运动中不出现干涉,整个反推力装置可以正常工作.本文建模流程与可靠性优化方法和结果可以为反推装置结构设计提供参考.
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.
常琦;胡颖石;周长聪;何宝明;冯奥博;王元生
西北工业大学,陕西 西安 710072中国航发商用航空发动机有限责任公司,上海 200241
反推装置阻流门运动机构可靠性优化设计
thrust reverse deviceblocker doormechanismreliabilitydesign optimization
《航空科学技术》 2024 (004)
52-59 / 8
航空科学基金(2020Z009053003);西北工业大学博士论文创新基金(CX2022012) Aeronautical Science Foundation of China (2020Z009053003);Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University( CX2022012)
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