What does life cycle mean?

Based on the safety and reliability of the structural system, the idea, main contents and system framework of establishing the safety management system of locomotive and rolling stock life cycle structure are put forward by applying the theory of product life cycle management, aiming at the four stages of design, manufacture, operation, maintenance and scrapping. The idea is: always take reliability as the center, implement comprehensive safety and reliability management in each life cycle, and adopt collaborative management mode. Through the information exchange, feedback and fault analysis of product holographic digital model, the reliability level of design, manufacture, use and maintenance is improved, so as to enhance the safety and reliability of locomotive and rolling stock product application and reduce the production cost. Accelerate the development cycle. The main contents include: structural reliability design, reliability control and analysis of manufacturing quality, reliability management of operation and maintenance, and reliability life assessment of scrap management. According to its main contents, the system framework is given. The key technologies of locomotive and rolling stock life cycle safety management system include: digital model of locomotive and rolling stock based on safety management, unified and complete reliability database and information management system, and comprehensive and scientific vehicle safety evaluation and management system.