Life cycle cost analysis considering multiple dependent degradation processes and environmental influence

Bin Liu, Xiujie Zhao, Guoquan Liu, Yiqi Liu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper presents a life cycle cost model for systems subject to multiple dependent degradation processes and environmental influence. Different from most existing studies that assume an infinite time horizon for cost analysis, we evaluate the life cycle cost within a finite horizon. The system is subject to multiple degradation processes, among which the dependence is described via copula. In addition to the stochastic dependence of the degradation processes, the health condition of the system is influenced by the operating environment. The environmental influence on the system condition lies in two aspects: It accelerates or decelerates the degradation processes and meanwhile leads to a random failure threshold. System reliability considering multiple dependent degradation processes and environmental influence is assessed as the first step, followed by the life cycle cost analysis. A numerical example is presented to illustrate the proposed model.
Original languageEnglish
Article number106784
Number of pages10
JournalReliability Engineering and System Safety
Volume197
Early online date8 Jan 2020
DOIs
Publication statusPublished - 31 May 2020

Keywords

  • life cycle cost analysis
  • multiple degradation processs
  • stochastic dependence
  • copula
  • reliability analysis

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