小半径竖曲线上磁浮车辆空气弹簧动态响应分析

Dynamic responses of air-spring suspension of a maglev vehicle negotiating a small-radius vertical curved track

以某高速常导磁浮车辆新型悬浮架为研究对象。建立了包括非线性空气弹簧模型和主动电磁悬浮控制的磁浮车辆动力学模型,模拟计算了车辆低速通过小半径凸竖曲线时的动力学响应,并与采用空气弹簧线性等效模型的计算结果进行了对比。结果表明,基于空气弹簧等效模型和非线性模型得到的车体和电磁铁动态响应差别不大,但空气弹簧等效模型的伸缩量计算值显著小于非线性空气弹簧模型;磁浮车辆单侧8个空气弹簧的垂向伸缩变形、橡胶气囊内压变化和垂向力变化规律符合线性关系,基于空气弹簧非线性模型的仿真结果为高速磁浮车辆二系悬挂系统设计提供了依据。

Combining with R&D of a new levitation frame of EMS high-speed maglev,a maglev vehicle dynamic model including non-linear air-spring models and active electromagnetic controllers was established.With this model,dynamic responses of a maglev vehicle negotiating a small-radius vertical curved track at lower speed were simulated,and the results were compared to those adopting linear equivalent air-spring models.Results showed that there is no big difference between dynamic responses of car-body and electromagnet with linear equivalent air-spring models and non-linear air-spring ones,but the calculated expansion-contraction amount of linear equivalent air-spring model is significantly less than that of non-linear air-spring one;variation laws of vehicle unilateral 8 air springs’vertical expansion-contraction deformation,rubber air bag inner pressure and vertical force conform to linear relationship;the simulation results based on nonlinear air-spring models can provide a basis for the design of secondary suspension system of high-speed maglev.