Analysis of Flexible Car Body of Straddle Monorail Vehicle

2017 5th International Conference on Mechanical Engineering, Materials Science and Civil Engineering

机械制造;材料科学;土木建筑工程

Zhong, Yuanmu^1

CRRC QINGDAO SIFANG CO., LTD., 88 Jinhong East Road, Qingdao, Shandong

201804, China^1

关键词: Damping ratio;    Flexible car body;    Modal parameters;    Pitch frequencies;    Rigid-flexible coupling dynamics;    Running wheels;    Vehicle ride;    Vertical stiffness;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/324/1/012071/pdf
DOI  :  10.1088/1757-899X/324/1/012071

来源: IOP

【 摘 要 】

Based on the finite element model of straddle monorail vehicle, a rigid-flexible coupling dynamic model considering vehicle body's flexibility is established. The influence of vertical stiffness and vertical damping of the running wheel on the modal parameters of the car body is analyzed. The effect of flexible car body on modal parameters and vehicle ride quality is also studied. The results show that when the vertical stiffness of running wheel is less than 1 MN / m, the car body bounce and pitch frequency increase with the increasing of the vertical stiffness of the running wheel, when the running wheel vertical stiffness is 1MN / m or more, car body bounce and pitch frequency remained unchanged; When the vertical stiffness of the running wheel is below 1.8 MN / m, the vehicle body bounce and pitch damping ratio increase with the increasing of the vertical stiffness of the running wheel; When the running wheel vertical stiffness is 1.8MN / m or more, the car body bounce and pitch damping ratio remained unchanged; The running wheel vertical damping on the car body bounce and pitch frequency has no effect; Car body bounce and pitch damping ratio increase with the increasing of the vertical damping of the running wheel. The flexibility of the car body has no effect on the modal parameters of the car, which will improve the vehicle ride quality index.