Research On Design Of A New Bogie For Light Rail Vehicles

As an important part of locomotives and rolling stocks, the bogie has functions such as supporting, traction, running and braking. It decides the safety and running quality of the train.Single-axle bogie concept is an unconventional mode different from the conventional bogie, there are many advantages such as mass reduction, lower interaction force between wheels and rail, reducing noise and good curving performance. So it has been successfully used commercial operation services in several countries and regions. Since single-axle bogie technology has an extensive perspective in mass reduction and energy effectiveness, it has been listed as one of the long-term development strategies research objective of railway improving energy utility by UIC.In the thesis, several classic types tram and their advantages and disadvantages of the independently rotating wheels were firstly introduced. Then, the single-axle bogie conception was brought forward, and several types of single-axle bogies and their operation and advantages have been introduced respectively.In the 2nd chapter, the technology parameters and the designing principles about light rail vehicles are mainly discussed, and a new train-set mode with the single-axle bogie is put forward and its main technology parameters are presented.In the 3rd chapter, the design of the single-axle bogie is introduced in detail, and it is shown that the main parts and assemble may be different from the conventional bogies.In the 4th and 5th chapters, the forces of wheel set, bogie frame and car body are analyzed, their derivation of kinetic equations and the dynamic simulation models are established. Then the dynamic performance of the models is simulated and calculated by the SIMPACK MBS program. The original suspension parameters are analyzed and optimized. The optimum parameters arc picked up which will ensure the single-axle bogie for better comprehensive performance including lateral stability, riding quality and negotiation. Further, the dynamic performance of the bogie is analyzed and calculated, and the performance is compared to the conventional bogies. The analysis and calculation results showed that the single-axle bogie has acceptable higher lateral stability and in the same time can improve the negotiation. It can reduce the vehicle wear between wheels and rails significantly, and when the train-set runs on the existing lines which curve radius is smaller, the vehicle friction power can be reduced prominently compared with conventional bogies.