Design On The Bogie Of 160km/h Repairing Vehicle For Overhead Contact Line Equipment

Since the electrified railway came out, its operating speed has improved gradually with the increase of the traction power and energy utilization rate, which makes it become more important for the development of regional economy. Under the pressure improving natural environment, adjusting the economic growth mode and eliminating the backward production capacity, the high speed railway has become the first choice in the construction of the infrastructure projects that the local government invests. In the last two years, more than 7000 kilometers new electrified railway opened to traffic in our country every year, and the scale of construction will be maintained this year. The electrified railway will be developed vigorously in our country with the fast and steady growth of market economy, which will also pull the industry to create more engineering machinery meeting the needs of the maintenance operation of high-speed railway at a later stage, including the 160km/h repairing vehicle for overhead contact line equipment.160km/h repairing vehicle for overhead contact line equipment is developed by the Measurement and Control Technology Research Institute of Lanzhou Jiaotong University and Lanzhou Lishengda Railway New Technology Limited Liability Company. The repairing vehicle can finish the maintenance of the contact line equipment for the electrified railway,and carry on line stringing when necessary. In this thesis, the design and relevant calculation of the bogie of 160km/h repairing vehicle for overhead contact line equipment are focused on.The main work can be summarized into the following six parts: In the first part, the general situation of repairing vehicle for overhead contact line equipment and the development of the train bogie for passenger and freight at home and abroad are introduced; In the second part,with the writer’s penetrating into the engineering vehicle, electric locomotive and EMU production site, visiting and studying the design and production links of the bogies, the bogie design scheme which could meet the requirements of 160km/h repairing vehicle for overhead contact line equipment is completed; In the third part, the design calculation of the bogie related to the dynamics performances are finished, mainly for the calculation of the matching parameters of suspension device, the curve negotiating ability, the axle load transfer and braking distance. And then the computing results are analyzed and verified by combining withthe design scheme repeatedly. Finally, the conclusion, that the bogie design scheme could meet the dynamics performance requirements of the repairing vehicle, is got; In the fourth part, the abnormal loads and the simulation operation loads are calculated referring to the force analysis on frame and calculation method in the TB/T2368-2005 "Motive power units-Bogie and running gear-Bogies frame structure strength test"; In the fifth part, the bogie assembly and its parts are modelled with SolidWorks. The frame is simplified with combining the real characteristics of the bogie as the thinking of finite element method. The 3D model of the bogie frame is imported into ANSYS without the characteristics defect, such as owe definition, superposition and interference to analyse the stress. Then fatigue strength of the bogie frame is analysed according to the simulation test results of the stress analysis; In the sixth part, the modal of the bogie frame is analyzed. The natural frequencies of the bogie frame are obtained with the results of the modal analysis in the main vibration states, and then the structure stability of the bogie and the running safety of the repairing vehicle are evaluated.As the mainstream fast bogie researched, the bogie design scheme that can meet the requirements of 160km/h repairing vehicle for overhead contact line equipment is proposed,and the H type integral welding frame, disc brake device and two-stage axle gear box transmission structure are selected as the main form of the bogie designed. The verification and parameter selections are completed through the calculation for the matching parameters of suspension device, the curve negotiating ability, the axle load transfer and braking distance.The strength check is completed with the studying on the structural characteristics of the bogie parts according to the requirements of the technical standards. Finally, the structural strength, the anti-fatigue ability and the natural frequencies of the frame could meet the design requirement of the 160km/h repairing vehicle.