关键词: 车辆工程, 跨座式单轨车辆, 侧偏特性, 轮胎模型, 平稳性分析

Abstract: In order to study the running stability problem of straddle type monorail, the straddle type monorail line in Chongqing was taken as the research object to establish the multibody dynamic model of 15-degrees-of-freedom, in which the PC track girder was regarded as rigid body and the non-linear characteristic of the rubber tire was considered. The dynamic differential equation of vehicle running was derived from Lagrange principle. Based on the simulation of PC track beam pavement in the American six road spectrum, the running stability of the straddle type monorail vehicle with different speed and variable radius of curvature was simulated and analyzed. The results show that in the small radius of curvature during the driving, the running stability of the vehicle decreases with the increase of the vehicle speed and increases with the increase of the radius of curvature.

Key words: vehicle engineering, straddle-type monorail vehicle, cornering characteristic, tire model, stability analysis