Study on reliability-based segmentation of lifetime of ground equipment in launch field

doi:10.16265/j.cnki.issn1003-3033.2017.12.007

Abstract

Abstract: In order to improve the accuracy of PSA work of the launch site ground system and overcome the difficulties caused by both the small sample and data loss, a kind of equipment full life segmentation method based on data characteristics was worked out, considering the uneven distribution of equipment failure rules with usage time. For the sake of working out the method, the changes of data accumulation during the period of usage time were analyzed and the three stages of the equipment were determined based on multi-source data. Monte Carlo simulation and life distribution function were used to calculate the reliability of the segmented time point. A certain conventional filling pump was taken as an example to verify the effectiveness of the piecewise method. The results show that the premetaphase point is 31 h, the corresponding reliability is 0.996 5, the middle and late point is 132 h, the corresponding reliability is 0.979 8.

Key words: probabilistic safety assessment(PSA), reliability, segmentation of lifetime, state transition, Monte Carlo simulation, lognormal distribution

CLC Number:

X924.3
V57

HUANG Jian, CHEN Jingpeng, XU Huimin, LIU Ningyuan, WANG Ning. Study on reliability-based segmentation of lifetime of ground equipment in launch field[J]. China Safety Science Journal, 2017, 27(12): 37-42.

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