Volume 39, Number 1, February 2021
|Page(s)||46 - 54|
|Published online||09 April 2021|
Mechanism reliability and sensitivity analysis of landing gear under multiple failure modes
Department of Engineering Mechanics, Northwestern Polytechnical University, Xi'an 710072, China
2 AECC Commercial Aircraft Engine Co., Ltd., R&D Center, Shanghai 201108, China
For a certain type of aircraft landing gear retraction-extension mechanism, a multi-body dynamic simulation model is established, and the time-dependent curves of force and angle are obtained. Considering the random uncertainty of friction coefficient, assembly error, and the change of hinge wear under different retraction times, the reliability model is built including three failure modes of landing gear, i.e. blocking failure, positioning failure and accuracy failure. Based on the adaptive Kriging model, the reliability and sensitivity of retraction-extension system under the condition of single failure mode and multiple failure modes in series are analyzed, and the rule of reliability and sensitivity changing with the number of operations is given. The results show that the system failure probability of landing gear mechanism tends to decrease first and then increase when considering the given information of random factors, and the influences of random factors on the failure probability vary with the number of operations. This work provides a viable tool for the reliability analysis and design of landing gear mechanisms.
Key words: landing gear / failure mode / mechanism reliability / sensitivity / Kriging model / simulation
关键字 : 起落架 / 失效模式 / 机构可靠性 / 灵敏度 / Kriging模型 / 仿真
© 2021 Journal of Northwestern Polytechnical University. All rights reserved.
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