FPSO外输系统维修策略研究

浮式生产储油轮(FPSO)是当今海洋石油天然气开发的主要设备之一。针对外输系统作为FPSO重要的一个子系统，但其传统维修策略过于依赖经验的缺陷，从可靠度角度出发，通过对失效模式和失效概率的分析从而确定较为合理的检修周期和大修周期。采取失效模式和效果分析（FMEA）方法确定主要失效模式及其关系，再利用动态故障树分析（DFTA）方法获得最小割集及相应故障时间，最后通过成组维修理论从全局最优化，经济性角度确定大修周期约为3.23年。经过与工程实际数据的对比，验证了该方法的可行性和适用性。

Study on Maintenance Strategy for FPSO Offloading System

Floating Production Storage and Offloading (FPSO) is being widely used in offshore petroleum production. As a key subsystem, the offloading system often fails and causes marine disaster. The aim of this study was to investigate the failure events and failure rate to determine the efficient maintenance strategy, in particular maintenance interval and overhaul cycle. Failure Mode and Effects Analysis (FMEA) method was applied for the reliability analysis of the main failure events and their interrelations. The logic structure of the main failure events was demonstrated by dynamic fault tree analysis (DFTA) in order to obtain the minimal cut sets, mean time between failure (MTBF) and failure probability by numerical analysis method. At last, group maintenances theory is applied to obtain the maintenance interval and overhaul cycle for the FPSO to achieve global optimum and feasibility. The result suggested the overhaul cycle is 3.2 years. After the comparison with actual engineering data, it is proved to be precise and this method is stable to be applied for engineering practice.