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Reliability assessment with varying safety threshold for shock resistant systems

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  • Chen, Yunxia
  • Zhang, Wenbo
  • Xu, Dan

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.

Suggested Citation

  • Chen, Yunxia & Zhang, Wenbo & Xu, Dan, 2019. "Reliability assessment with varying safety threshold for shock resistant systems," Reliability Engineering and System Safety, Elsevier, vol. 185(C), pages 49-60.
    • Handle: RePEc:eee:reensy:v:185:y:2019:i:c:p:49-60
    DOI: 10.1016/j.ress.2018.12.005
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    Cited by:

    1. Sun, Fuqiang & Li, Hao & Cheng, Yuanyuan & Liao, Haitao, 2021. "Reliability analysis for a system experiencing dependent degradation processes and random shocks based on a nonlinear Wiener process model," Reliability Engineering and System Safety, Elsevier, vol. 215(C).
    2. Yaguang Wu & Qingan Qiu, 2022. "Optimal Triggering Policy of Protective Devices Considering Self-Exciting Mechanism of Shocks," Mathematics, MDPI, vol. 10(15), pages 1-18, August.
    3. Zhang, Chengjie & Qi, Faqun & Zhang, Ning & Li, Yong & Huang, Hongzhong, 2022. "Maintenance policy optimization for multi-component systems considering dynamic importance of components," Reliability Engineering and System Safety, Elsevier, vol. 226(C).
    4. Wang, Jia & Han, Xu & Zhang, Yun-an & Bai, Guanghan, 2021. "Modeling the varying effects of shocks for a multi-stage degradation process," Reliability Engineering and System Safety, Elsevier, vol. 215(C).

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