ENERGY ABSORPTION CHARACTERISTICS AND VIBRATION CONTROL EFFECT OF SEMI-ACTIVE MASS DAMPER SYSTEM

Abstract

The energy absorption characteristics of mass damper systems in time domain were studied in this paper. The control performance of the semi-active mass damper (SAMD) system was mainly discussed, analyzing two-degree-of-freedom models. Through the results of response analyses under harmonic or random excitations, the efficiency of the semi-active mass damper system was proved. The analyses also proved that the SAMD system has an optimum control gain magnitude which maximizes the vibration control efficiency. It was demonstrated that a couple of SAMDs were effective for reducing the transverse-torsional vibration response of a building against wind excitations.