基于成本的长输管道腐蚀缺陷检测及维修规划

提出了基于成本的长输管道腐蚀缺陷的检测及维修模型，将总成本分为检测和维修2部分，根据总成本最小原则确定最优检测及维修规划。最优的检测及维修，是在保证管道在设计工作寿命内的最大腐蚀深度小于满足强度要求的最大腐蚀裕量的基础上，使管道生命周期内总的期望费用最小。针对腐蚀缺陷的发展过程，以最早产生缺陷的尺寸为界限进行划分，对不同腐蚀程度缺陷进行分类修复。通过比较在不同的状态点下进行检测修复所产生的检测和维修总费用，确定最优的检测及维修规划。

Cost-based Inspection and Repair Planning for Corrosion Defects in Long Distance Pipeline

A cost-based inspection and repair model for corrosion defects in long distance pipeline is proposed. The total cost is dived into two parts, one for inspection and another for repair. The optimal inspection and repair planning is determined according to the maximum principle of the total cost. The optimal inspection and repair are to keep the total expected cost to a minimum in pipeline life cycle, ensuring that the maximum corrosion depth of pipeline in design service life is less than the maximum corrosion margin that meets the strength requirement. Taking the size of the earliest generated defect as a limit, the corrosion defects are divided for their development, and the corrosion defects with different corrosion degrees are classified and repaired. The optimal inspection and repair planning is determined by comparing the total cost of inspection and repair at different corrosion states.