悬挂式单轨车辆悬挂参数对运行平稳性的影响研究

Investigation on influences of the suspension parameters on running stability for suspended monorail vehicle

悬挂参数是影响悬挂式单轨车辆运行安全性与平稳性的关键因素之一。基于多体动力学理论,考虑轮胎及止挡元件非线性特性,开展悬挂式单轨车辆的动力学建模及悬挂参数特性研究。结合现场动力学试验结果,验证所建模型的有效性。依据该动力学模型进一步研究二系悬挂参数在不同载荷工况下对车辆运行平稳性的影响规律。研究结果表明:基于本模型计算参数,当二系垂向刚度约为0.2~0.3 MN/m,垂向减振器阻尼值为8~10 k N?s/m时,车辆的垂向运行平稳性较优;车体的横向平稳性则在二系横向刚度为3~4 MN/m时较优。

Suspension parameters are the key factors that affect the running safety and stability of suspended monorail vehicle.Based on the multi-body dynamics theory,a detailed dynamic model of the suspended monorail vehicle is established,considering the nonlinear characteristics of the tire and stop.Then validity of the simulation model is verified by the field dynamic test results.The influences of the secondary suspension parameters on vehicle ride stability under different load conditions are further studied adopting the dynamic model.The following conclusions can be drawn that,with the calculation parameters concerned in this paper,the optimal vertical secondary suspension stiffness and the vertical damping is about 0.2~0.3 MN/m and 8~10 kN?s/m,respectively.The lateral stability of vehicle is optimal with the lateral stiffness of 3~4 MN/m.