The Parameter Optimization And Rigid Flexible Coupling Analysis Of Stability Device In Dynamic Stability Vehicle

With the accelerating pace of development in China Railway,railway construction and maintenance efficiency is directly related to the quality of the Railway development. Most of railway line is the ballasted track structure in China,the ballast will appear harden and then loses its elasticity because of the influence of vehicle runs for a long time and natural environment.So it is necessary to use the dynamic stability of car maintenance on a regular basis to restore the elasticity of track, ballast and improve the ballast life cycle.For the new laying of railway,it is ballast lateral resistance need to recovery.Now there is no Systematic research on the vibration frequency of the stable device in our country,therefore by optimizing the excitation frequency of stabilizing device to the improved dynamic stability of vehicle operation efficiency.The main research of dissertation is as follows:By testing ballast,which is the new laying and after crunching, vertical stiffness and lateral stiffness and using discrete element software simulated the ballast stiffness, obtain the stiffness of ballast.According to the working principle of stabilization device and characteristics of ballast establish optimization model. Then by optimizing the excitation frequency,which is based on the stiffness of ballast, to improve the operating efficiency of the stabilized vehicle.Using the dynamics software research on the stability of device dynamics in the best vibration frequency.Considering the deformation of the track during the actual operation, the track is treated as a flexible body. By comparing the dynamic characteristics of the multi rigid body system and the multi flexible body, researching the influence of the deformation of the track on the system.In summary, through analyzes the ballast stiffness after crunching, lateral ballast resistance increases with lateral displacement of sleepers.When the lateral displacement reaches lmm, the lateral resistance of the ballast increases slowly with the displacement.By optimizing the excitation frequency of stabilizing device on the ballast in loose state, the optimal excitation frequency for stabilizing device is 14.32Hz.In the stability device with 14.32Hz excitation frequency operation,when the track is considered as a flexible body,the maximum acceleration of the track is larger than that of the rigid track.