Study On Assessing Approach For Status Of High-speed Railway Plane Alignment

The spatial shape of the high-speed railway is the running trajectory of the highspeed train.Whether the plane state is good or not is directly related to the safety,stability and passenger comfort of the train.In order to realize the effective control and scientific management of the high-speed railway line’s linear state,it is necessary to aim at the high-speed railway’s flat line characteristics and to reasonably construct an existing high-speed railway spatial linear state evaluation method.Therefore,based on the actual linear characteristics of the high-speed railway line,a high-speed vehicle-line dynamic model is established to analyze and study the influence of the line shape on the dynamic characteristics of high-speed vehicles under different driving speeds.Firstly,the line model is established according to the linear characteristics of the existing high-speed railway line,and then the dynamic simulation model of the highspeed railway vehicle-line system is established using dynamic theory and methods,and the established dynamic model is compared and analyzed using the high-speed railway measured data.These verifies the rationality of the built high-speed railway vehicle-line system dynamics model.Secondly,using the established high-speed railway vehicle-line system dynamics model to simulate and analyze high-speed trains running at different speeds of 250km/h、300km/h、350km/h and 400km/h in straight,transition and circular sections.In order to obtain the regularity of the influence of the irregular wavelength and deviation of the line on the dynamic performance of high-speed vehicles.It provides a foundation for the construction of high-speed railway line planar shape assessment method.Finally,the study determined the management value of the high-speed railway plane linear dynamic index,and proposed the high-speed railway plane linear state index.Combined with the uneven wavelength and deviation of plane linearity and the dynamic performance of high-speed railway vehicles under different driving speeds,the deviation coefficient is analyzed,and a method for evaluating planar linear state of high-speed railway lines based on planar linear state index and stationarity analysis was proposed.Combined with examples,the established method was applied and analyzed.