RAMS Study On The Vossloh W300-1 Fastening System Of High-speed Railway

Our high-speed railway construction has been in fast development in recent years which results in the mass production of different parts of track.The comprehension of the engineering structure parts should be raised to height of track products.Highly attention should be urgently payed to the entire process of design?manufacture?construction and maintenance for track products.As the engineering technology throughout product full-life cycle,the application achievement of the RAMS can effectively improve the reliability?availability?maintainability and safety of products.Given the status of RAMS theory starting late in our country and few application examples in track engineering field,establishing RAMS evaluation analysis system of track system or subsystem has an initiating significance.This thesis combines RAMS theory with fastening system for the first time,preliminary establishing the system of RAMS theory analysis of high-speed railway fastening.Related research and main conclusion are summarized as follows.(1)In-depth study at fault modes reason and effects on different levels of the Vossloh W300-1 fastening system combined with FMECA and FTA,which identifies its vulnerable spots.And putting forward a improved maintenance method on the phase of design?manufacture?construction and maintenance.On the other hand,fitting the data distribution type based on fault data from Wuhan-Guangzhou high-speed railway line and respectively calculating reliability curve and relative indexes of frequent malfunctions and general section.(2)Figuring out the special fault mode condition which should be greatly payed attention to when in field maintenance based on influence laws research on driving security of trains at fastening failure condition.Meanwhile,adopting Analytic Hierarchy Process based on fuzzy comprehensive evaluation to determine weight factor for different parts of system.Then establishing safety state evaluation function for the Vossloh W300-1 fastening system in order to preliminary construct grade evaluation mechanism for track subsystem.(3)Establishing reliability analytical model for fastening system under preventive maintenance state and adopting method of exhaustion to discuss the impacts of maintenance frequency and cycle on average life of Vossloh W300-1 fastening system.Series of numerical solution of the optimal combination of maintenance frequency and cycle has been calculated aiming at single-object decision which set average life as the unique goal.The optimal maintenance cycle suggested value has been put forward for different sections and maintenance modes through establishment of average life-cost multi-objective optimization model based on importance degree of decision,which provides some theory basis for the formulation of maintenance plan enacted by railways bureau.