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以重庆市跨座式单轨交通系统牛角沱至李子坝区段的预应力混凝土简支梁为研究对象,将每节车辆简化为6个自由度的动力系统,运用牛顿法建立考虑轮胎侧偏特性的跨座式单轨列车车辆的运动方程;用模态综合法建立轨道梁的运动微分方程;根据车辆和轨道梁的力协调条件,建立车辆与轨道梁动力相互作用的竖向耦合运动控制方程。采用Visual Fortan 6.5编制程序,研究不同车速、不同轨道不平顺条件下轨道梁和车辆的竖向动力响应。结果表明,车速及不同轨道不平顺条件对轨道梁挠度的影响较小,但对加速度影响较大;车体的竖向加速度随车速增大而增加,车速小于40 km.h-1时,不同的轨道不平顺激励对车体竖向加速度的影响较小,而当车速大于40 km.h-1时,则影响较大。
Taking the prestressed concrete simply supported beam in the hurdle monorail of Chongqing as the research object, this paper simplifies each vehicle into six degrees of freedom dynamic system, The motion equation of the straddle monorail vehicle is established. The modal synthesis method is used to establish the motion differential equation of the rail beam. According to the force coordination condition between the vehicle and the rail beam, a vertical coupled motion control equation of dynamic interaction between the vehicle and the rail beam is established. Visual Fortan 6.5 programming was used to study the vertical dynamic response of track beam and vehicle under different vehicle speeds and different track irregularities. The results show that the influence of vehicle speed and different track irregularities has little effect on the deflection of the track beam, but has a great influence on the acceleration. The vertical acceleration of the vehicle body increases with the increase of vehicle speed. When the vehicle speed is less than 40 km · h-1, The effects of the irregular track excitation on the vertical acceleration of the vehicle body are small, but when the vehicle speed is greater than 40 km.h-1, the impact is greater.