Study On Air Springs Of High-speed Maglev Train

Due to the advantages, such as nonlinear stiffness characteristic,low vibration frequency,automatically averting from a resonance and repressing the resonance amplitude, etc, air spring is widely used in the bogie of vehicles in domestic and abroad. Air spring is one of the key components of second suspension in CMT high-speed train's vertical dynamics system. It can eliminate high frequency stimulate effectively. When the train's carrying changes, the height of floor can be kept constantly by adjusting the air springs.This paper introduces the general situation, module sorts, compute, analysis principle of the dynamics software ADAMS. The technique of cooperation simulation and platform which is based on is presented. Then the paper discusses the developing history, researching actuality, working principle, stiffness characteristics, frequency characteristics of air spring. We study energetics and dynamic air spring model separately, and establish a non-linear mechanical air spring model then simulate in ADAMS/View. The air spring model which is based on kinetic equations proves the nonlinear stiffness characteristics and etc.On the multi-body dynamic analysis cooperation platform, we establish a modular assembly dynamics and control vehicle model by use of three basic modules (suspension /oriented modules, suspension framework, car-body and traction institutions) which is combined with air spring model. Then a sine-wave transition curve is used to connect a linear and a circular curve to compose a five-segment small radius orbit,which the combined maglev train model do dynamics simulation on. We use ADAMS / Post-Processor to analysis the simulation results and acquire the swing pole force data. Then to contrast them with original data which is acquired from maglev train model with old sort air springs. The results show that: when we use new sort of air springs as maglev train's second suspension, which is established from dynamic equation. The swing pole's horizontal forces data aren't very different from original data, but the vertical forces reduce very much. This prove that the application of new sort of air springs improve the vibration between bogie and car body and the maglev train model has better stability when traveling through the railway.