Dynamic Stiffness Analysis of Rubber Absorber in Rail Fastening

摘要

Based on a hypothesis superposition theory of nonlinear elastic restoring force (NEF)and nonlinear damping force(NDF),a non-linear dynamic mechanical model is proposed.Rubber absorber in rail fastening is tested according to the working condition,found that the simulated results are in good agreement with the experiment,accordingly verified the validity of this model.The influence of the amplitude and frequency on the NEF,NDF and the dynamic stiffness was studied.The results show that:With the increase of amplitude,the NEF and the NDF increase rapidly,and the dynamic stiffness values increase too.With the increase of frequency,the NEF decreases slightly,while the NDF increases and the dynamic stiffness has an increasing trend.