Non-linear dynamic behavior of a Rubber-Layer Roller Bearings (RLRB) isolator

In this paper we investigate the frictional and dynamical behavior of a Rubber-Layer Roller-Bearings (RLRB) isolator, for seismic and mechanics applications. By studying the viscoelastic contact mechanics of the rollers with the rubber layer, we determine the non-linear viscoelastic damping of the device. Further, we investigate the dynamic behavior of a two degrees of freedom vibrating system equipped with the RLRB isolator. Results are compared with an ideal linear system with similar dynamic parameters. We show that, thanks to the non-linear viscoelastic behavior of the base isolation device, smaller amplification factors and transmitted forces can be achieved, compared to the case of linear damping. Since such a result can be of crucial importance in several real-life applications, such as seismic engineering and mechanical noise and vibration control, we hope this early work will boost the interest in the field of non-linear viscoelastic damped systems dynamics.