Study on the Modeling Methods of Air Spring in the System Dynamics of High-speed EMU
QI Zhuang1, LI Fu1, HUANG Yun-hua1, YU Da-lian2
1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China;2. NEL for High Speed Train, CSR Qingdao Sifang Co. LTD, Qingdao 266111, Shandong, China
Abstract：The dynamics models of the high-speed EMU’s air spring are mainly sorted in three types: the linear model composed of a static stiffness spring and a damper in parallel, the non-linear model based on the hydromechanics and pneumatics theory and the complete model considered the complete pneumatic suspension system. From the analysis of the quasi-static behavior of the three types of models and the vehicle system dynamics simulation of high-speed EMU, it was found that, the non-linear model and the complete model possess the similar hysteresis curves and the damping of the linear model is higher, but the three models’ dynamics calculation results agree well on the vehicle running safety index. The results of the study indicate that, in the dynamics calculation of high-speed EMU, for the running safety index, the linear model can satisfy the engineering requirements; but for the ride comfort index, it’s better to use the non-linear model or the complete model for modeling the air spring to approach closer to the actual situation. As the physical parameters of the complete model are too many to be identified, the non-linear model is recommended in the high-speed EMU dynamics calculation.
戚壮;李芾;黄运华;虞大联. 高速列车系统动力学空气弹簧建模方法研究[J]. , 2014, 33(12): 63-68.
QI Zhuang;LI Fu;HUANG Yun-hua;YU Da-lian. Study on the Modeling Methods of Air Spring in the System Dynamics of High-speed EMU. , 2014, 33(12): 63-68.
2014, Vol. 33 
