Research On Reliability And Maintainability Of Catenary System

With the development of high-speed railway,the speed of train has constantly improved in recent years, so the reliability and maintainability of the catenary are especially important. To evaluate catenary's service behavior of the high-speed railway,we not only research system's structure and establish reliability calculation model,but also research the maintainability that if we can repair it in short time to resume its previous working situation when it failure.The thesis undertakes statics and dynamics analysis of the cantilever structure by FEA software. Static stress and strain under different working conditions and first 10 steps natural vibration frequencies are educed. We also analyze dynamic response of cantilever structure under periodic loads and research vibrative effects when the train pass through the cantilever structure with a special speed. All of these provide basis for design and calculation of cantilever structure in the future. The thesis undertakes reliability research of structure components and connect line based on relevant fuzzy mathematical theory. Mathematic model of fuzzy reliability calculation is established which improves traditional reliability calculation model.The main research object in chapter 4 is catenary system. Maintainability model of system is established in this chapter and we also do something about maintainability distribution based on fuzzy mathematic to distribute maintainability indicators to every component of system.With the development of science and technology,many new technologys have been used in research and production of catenary system which improve reliability of system but enhance costs of research and production. The thesis undertakes relevant research on life cycle cost of catenary system and balances reliability,maintainability and economization to optimize every indicator of system.