Abstract: A new dynamic model for nonlinear hysteresis vibration isolation system is proposed, and the practical representation of dynamic model of the system is derived. The model is constructed by dynamic nonlinear stiffness and dynamic nonlinear hysteresis damping mechanisms, the nonlinear hysteresis damping force is denoted as the function of displacement, which makes the numerical calculation easier, and decreases amount of measuring work. The physical meanings of all parameters of the model are clear. The stiffness coefficients can reflect the linear characteristic and nonlinear ones, and the damping function can reflect the hysteresis and dissipative characteristic of the system perfectly. Using the damping function, all kinds of damping, such as viscous damping, friction damping and higher one etc., which maybe exist in the vibration isolation system, can be efficiently identified.

Key words: Damping, Dynamic model, Hysteresis, Nonlinear, Vibration isolation system