Abstract: The metal-net rubber materials have complex nonlinear hysteresis characteristics, the constitutive model of related materials is difficult to describe its mechanical properties accurately. The metal-net rubber combination damper is a metal damper with rigidity and damping designability. Based on the static mechanical theory of metal-net rubber, the equivalent stiffness parameters and equivalent damping parameters with preload parameters are proposed. Using the elastic restoring force expressed by power series and the damping force expressed by elliptic equation, a dynamic hysteresis model of spring metal-net rubber composite damper is derived. Through dynamic hysteresis tests at different loading frequencies, the dynamic hysteresis characteristics and the variation rules of evaluation parameters of energy dissipation for vibration damper under different relative density of metal-net rubber and loading frequency are compared and analyzed. After the parameters were fitted by combing with the dynamic hysteresis test data of the damper and the dynamic hysteresis model, the accuracy of the dynamic hysteresis mechanical model is verified according calculating the theoretical value and analyzing the errors.

Key words: metal-net rubber, combination damper, dynamic hysteresis test, dynamic hysteresis model, parameter identification