| Citation: | ZHOU Changcong, ZHAO Haodong, CHANG Qi, et al. Reliability and sensitivity analysis of relief valve mechanism of aircraft door considering wear[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(4): 690-697. doi: 10.13700/j.bh.1001-5965.2020.0024(in Chinese)
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As an important part of the aircraft door, the relief valve mechanism plays an important role in maintaining the normal and safe operation of the aircraft. In this paper, the multi-body dynamical model of the relief valve mechanism is built in ADAMS to study the effect of pin wear on positioning accuracy. The performance function of the positioning accuracy of the mechanism is established. The active Kriging model is introduced to find samples points which can obviously improve the fitting accuracy according to learning criteria. The Monte Carlo method is used to estimate failure probability and three sensitivity indices at different wear times, and the change rules of failure probability and failure probability based global sensitivity indices under different thresholds have been studied. The results show that under different wear times, the global sensitivity indices of a pin with a larger wear amount are also larger, and there are differences in the changes of various indices with the wear times.
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