Abstract:Experimental and constitutive study on dynamic characteristics of FS-2-80 rubber isolator were conducted. M-RT model to consider the influence of frequency and dynamic displacement amplitude was used to describe dynamic constitutive behavior of the isolator. The comparison between the experimental and predicted results showed that the model in the paper could preferably well describe the dynamic constitutive behavior. Based on the M-RT model, the relationship between dynamic stiffness, dynamic damping and amplitude, frequency was discovered. The nonlinear characteristics of FS-2-80 rubber isolator under small amplitude were also studied.