天津理工大学学报
天津理工大學學報
천진리공대학학보
JOURNAL OF TIANJIN UNIVERSITY OF TECHNOLOGY
2014年
4期
1-5
,共5页
故障相关%外部冲击%机会维修%两部件系统
故障相關%外部遲擊%機會維脩%兩部件繫統
고장상관%외부충격%궤회유수%량부건계통
failure interaction%external shocks%opportunistic maintenance%two-unit system
在为两部件系统制定预防性维修策略时，传统的研究只考虑故障相关或外部冲击一方面的影响，导致系统的故障率被低估。针对这一问题，文章综合考虑二者的共同影响，且外部冲击的到达服从非齐次泊松过程，更符合实际情况。首先通过年龄预防性维修确定出最优更换周期，然后在年龄预防性维修的基础上引入机会维修，以预防性维修周期内的维修费用率最低为优化目标，利用更新报酬理论构建期望维修费用率的模型，确定出最优机会维修阈值，并通过算例分析了故障相关性与外部冲击对机会维修策略的影响。
在為兩部件繫統製定預防性維脩策略時，傳統的研究隻攷慮故障相關或外部遲擊一方麵的影響，導緻繫統的故障率被低估。針對這一問題，文章綜閤攷慮二者的共同影響，且外部遲擊的到達服從非齊次泊鬆過程，更符閤實際情況。首先通過年齡預防性維脩確定齣最優更換週期，然後在年齡預防性維脩的基礎上引入機會維脩，以預防性維脩週期內的維脩費用率最低為優化目標，利用更新報酬理論構建期望維脩費用率的模型，確定齣最優機會維脩閾值，併通過算例分析瞭故障相關性與外部遲擊對機會維脩策略的影響。
재위량부건계통제정예방성유수책략시，전통적연구지고필고장상관혹외부충격일방면적영향，도치계통적고장솔피저고。침대저일문제，문장종합고필이자적공동영향，차외부충격적도체복종비제차박송과정，경부합실제정황。수선통과년령예방성유수학정출최우경환주기，연후재년령예방성유수적기출상인입궤회유수，이예방성유수주기내적유수비용솔최저위우화목표，이용경신보수이론구건기망유수비용솔적모형，학정출최우궤회유수역치，병통과산례분석료고장상관성여외부충격대궤회유수책략적영향。
When making preventive maintenance policy for two-component systems, traditional research always treat failure interaction and external shocks separately, which lead to the underestimation of the failure rate. In view of this problem, a new replacement model for a two-unit system which is both subjected to failure interaction and external shocks isp-resented, what's more, the external shocks arrive in a Non-Homogeneous Poison Process, which is closer to actuals.First, the optimal replacement period is calculated under age replacement policy, based on this, the opportunistic maintenance has also been introduced. Then the model is derived from the theory of renewal process, which focuses on minimizing the overall main-tenance cost within one maintenance cycle, and the optimal replacement policy is determined. A numerical example is given to illustrate the impact of failure interaction and external shocks on the optimal maintenance policy.
