Reliability assessment with varying safety threshold for shock resistant systems

Yunxia Chen, Wenbo Zhang and Dan Xu

Reliability Engineering and System Safety, 2019, vol. 185, issue C, 49-60

Abstract: The anti-shock auxiliary device is an important part to protect a shock resistant system from shock loads, and the damage degree and recovery state of the device seriously affect the damage process and failure behavior of the whole functional system. In this paper, the concept of the varying safety threshold is proposed to represent the absorbing capability of the auxiliary device to time-varying shocks, and it is modeled by a piecewise function of two variables with shock magnitude and inter-arrival time. In addition, a reliability assessment model is proposed with the varying safety threshold. Furthermore, a numerical example using hydraulic control system (HCS) is conducted to demonstrate the effectiveness of our model. Finally, the effect analysis of different types of shock loads and the parameter sensitivity analysis are also discussed in order to improve the reliable life index of shock resistance systems.

Keywords: Varying safety threshold; Reliability assessment; Shock resistant system; Shock magnitude; Shock inter-arrival time (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:185:y:2019:i:c:p:49-60

DOI: 10.1016/j.ress.2018.12.005

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