Structural Design and Dynamics Performance Urban Light Rail Vehicles Bogies with Bolster

doi:10.3901/JME.2019.14.088

Abstract

Abstract: With the wider application of urban rail transit, in addition to the operational requirements of the city, there is a demand for suburban operation (running speed up to 120 km/h). In order to solve the problem of speed increase and cross line operation of urban light rail vehicles, a bogie structure design with bolster and studies its dynamic performance is proposed. The scheme mainly adds a bolster structure between the carbody and the frame, and achieves the decoupling of yaw motion constraint and the non-linearity of rotation damping. Through the analysis of the bogie structure, the force condition of the bogie, the bolster and the carbody are studied. The low-floor vehicle train model is established based on the system dynamics method. The stability, ride quality, safety (including the R350 large radius curve and the R50 small radius curve) and the bogie X-factor (bogie rotational resistance coefficient) of two bogies are analyzed. Due to the non-linear characteristics of the rotation damping, the dynamic performance of bogies with bolsters is better than that of bogies without bolster under all operation conditions. The bogie can not only meet the requirements of high-speed operation in suburbs (to ensure 120 km/h operation), but also meet the requirements of safety of small radius curve in the city (safely through R50), which provides guarantee for cross-line and speed-up operation.

Key words: bogie with bolster, dynamics performance, light rail vehicle, speed increase and cross line operation

CLC Number:

U270

ZHOU Cheng, CHI Maoru, LIANG Shulin, WANG Xiangtao, ZHOU Fei, WU Xingwen. Structural Design and Dynamics Performance Urban Light Rail Vehicles Bogies with Bolster[J]. Journal of Mechanical Engineering, 2019, 55(14): 88-95.

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