Presentation Information
[A-10-10]Reliability of Systems Subject to Nonfatal Common Shocks
〇Takeru Morimoto1, Natsumi Takahashi1, Tetsushi Yuge1 (1. National Defense Academy)
Keywords:
common cause failure,k-out-of-n:G system,MOSE system
It is well known that redundancy can improve reliability of systems. However, common cause failures, where multiple components fail simultaneously, can negate the benefits of redundancy and significantly reduce reliability of systems.Therefore, common cause failures are a key factor in evaluating reliability of systems. The MOSE system is a representative example of a system affected by common cause failures. previous studies on MOSE system has been conducted under the assumption that all components subjected to a shock will inevitably fail. However, whether a component fails upon the arrival of a shock is probabilistic, as various factors are involved. In this paper, we consider an (n−k+1)-out-of-n:G system with a single shock source that simultaneously affects all components. We derive a formula for the system reliability when each component fails probabilistically upon exposure to a shock, and we illustrate its characteristics through numerical examples.