Overall Scheme Design And Dynamic Performance Study On Inner Axle Box Bogie For 200km/h High Speed Freight Car

Railway transportation,as a traditional mode of transportation,plays a very important role in the economic development of all countries in the world.Compared with other traditional modes of transportation,it has the characteristics of high speed,low gross weight and green.With the prosperity of the world economy,there are more and more kinds of goods to be transported.Many goods with high added value need to be transported rapidly.In order to meet these transportation requirements,railway freight transportation is developing in the direction of high speed,heavy load and environmental protection.The key to the improvement of railway transportation performance lies in the research of bogies.To meet the requirements of high speed,heavy load and low wear,it is necessary to develop new bogies.As a new type of bogie,the inner axle box bogie has the characteristics of low deadweight,low noise,low wear and high performance.It has been successfully used in urban rail vehicles,high-speed passenger cars and freight cars abroad,while the domestic research on the inner axle box bogie is almost blank,especially the inner axle box bogie.In the process of researching the bogie of 200 km/h high-speed truck with inner axle box,the following work has been accomplished in this paper:(1)Summarize the development situation and structural characteristics of traditional main bogies,fast freight car bogies and inner axle box bogies at home and abroad.Drawing lessons from typical bogie technology,the overall scheme design and the detailed design of some parts of the inner axle box bogies of 200 km/h high-speed freight cars are completed.(2)According to the structural characteristics of the bogie,the basic assumptions for its dynamic calculation are put forward,the non-linear factors of the vehicle system are analyzed,and the dynamic simulation model of the system is established.At the same time,the evaluation index of vehicle dynamic performance in GB 5599-85 "Code for Dynamic Performance Evaluation and Test Appraisal of Railway Vehicles" is introduced.(3)Using a single variable test method,the effects of the longitudinal stiffness of the rotating arm,the transverse stiffness of the rotating arm,the stiffness of the wheel-set cross-bracing,the wheelbase of the bogie,the center distance of the journal,the horizontal stiffness of the secondary rubber spring,the torsional stiffness of the anti-roll torsion bar and the damping and transverse span of the anti-snake damper on vehicle dynamics are discussedand studied,and the parameters are optimized to obtain a group of better ones.Bogie suspension parameters.(4)Evaluate the dynamic performance of the optimized vehicle and analyze the stability of the anti-snake shock absorber under a invalid working condition.