Microstructure-Based Equivalent Visco-Hyperelastic Model of Viscoelastic Damper

The mechanical properties of viscoelastic (VE) dampers directly affect the aseismic performance viscoelastically damped structures; therefore, it is great significance to accurately describe nonlinear characteristics VE in design and analysis structures. However, most existing mathematical models for have been established from a macroscopic perspective, there general lack comprehensive connection microstructure materials external influence factors such as loading frequency, ambient temperature, strain amplitude. In this paper, inspired by molecular chain network fractional derivative theory, microstructure-based equivalent visco-hyperelastic model proposed with consideration temperature dependence filler reinforcement effect. To verify characterization capacity model, laboratory experiments on dynamic property were carried out varying frequencies, temperatures, amplitudes, was then employed predict experimental results. Finally, parameter conducted clarify relationship between material its performance. indicate that damper possesses an excellent energy-dissipation capability, characteristic parameters tend be more sensitive low ranges frequency than high ranges. Comparisons numerical results suggest can at different amplitudes good accuracy. Parameter demonstrates reflect dampers.