Derailment Analysis And Optimizing For 50 Kg/m Rail No.6 Turnout

Safety is the eternal theme in transportation industry,the train derailment,as a typical hidden danger of railway transportation system,which occurred will cause serious casualties and property losses,the transportation order will be seriously influenced.Therefore,ensuring rolling stock derailment safety is crucial in the process of running.Turnout as an important part of track structure and system integration,has always been one of the key technology of railway construction.turnout is also one of track's weak links,focal and difficult points of maintenance,which affects the safety of train operation directly.50kg/m rails 6 symmetry turnout due to its small size,low construction cost and allowable speed,has been applied in the freight car marshalling yards on a wide range.But due to the impact angle of tongue rail in turnout part is larger,complex working conditions and maintenance does not reach the target,derailment accident occurred frequently in the past two years,which pose a serious threat to the safety of marshalling vehicles.Thus,conducting an optimization of rail structure to improve the safety of a bifurcation is urgent.This article aimed at derailment of 5.0kg/m rails 6 symmetry turnout,to summarize it,cause analysis,dynamics simulation analysis and structure optimization,etc,to carry out the work.From the perspectives of basic rail track performance,improving the tongue rail relative relationship and adjusting the yard aspects,put forward the optimization scheme.Reasonable suggestions are put forward in allusion to its maintenance,and conduct a validation on the line.The research shows that:due to the complexity of derailment,specific situation need specific analysis,in view of the specific reason,taking pertinent measures can effectively solve the scene problem.Paper's main work and conclusions are as follows:1.Summarize the structure characteristics and laying condition of 50kg/m rails 6 symmetry turnout in our country.Aimed at the scene of derailment cases,conclusion contrast characteristics,and analyzes the reasons of derailment.2.Based on the finite element method to establish the perfect vehicle and rail system coupling dynamics model,aimed at typical influence factors for derailment,simulation analysis is carried out.Simulation results show that before the bifurcation curve radius is less than 200 mm,the clamp straight line length less than 2 m and for the section with the top width of 20 mm,tip rail elevation difference is less than 2 mm,in this case,derailment easy to occur.3.Combined with 50 kg/m rails 6 symmetry turnout the derailment characteristics and dynamics simulation of 50 kg/m rails 6 symmetry turnout form of tongue rail,meet guardrail arrangement,dowel bar structure,conduct an optimization design.4.Combined with 50 kg/m rails 6 symmetry turnout the derailment characteristics and dynamics simulation,50 kg/m rails for six symmetrical rail maintenance and repair work item corresponding reasonable suggestions were put forward.5.For 50 kg/m rails 6 symmetry turnout to the particularity of on-site service conditions,to minimize the risk of derailment when vehicle in the weaving process since the hump humping to 50 kg/m rails 6 symmetry turnout,Specially formulated maintenance management measures.