超期服役起重机械安全评估技术研究OA

Fundamental evaluation of safety assessment techniques for overdue service hoisting machinery were conducted using inspection and testing methods,including non-destructive testing,stress testing,and physicochemical analysis.Damage analysis of the metal structures was performed based on the Miner cumulative damage model.The remaining service life was accurately predicted using the Paris formula.A three-level evaluation and early warning system for structural life assessment was developed,integrating fundamental assessment methods,Miner theory,and fracture mechanics models,establishing a dynamic,progressively refined closed-loop mechanism for life-cycle management and early warning,enabling comprehensive safety control throughout the entire service life of overdue service equipment.The research also provides technical support for formulating the Guidelines for Safety Assessment of Overdue Service Hoisting Machinery and guides the updating of related technical standards.