Abstract
A tuned sloshing damper (TSD) utilizing an electro-rheological(ER) fluid as a sloshing liquid (ER-TSD) is proposed. The sloshingfrequency of the TSD depends on the sloshing stroke length of the liquidcontained in the tank. In this paper, the ER-TSD is used in the form of arectangular tank with electrodes. The ER-TSD sloshing frequency can becontrolled by applying an electric field to the ER fluid. We have studiedthe vibrations of a structure which had two natural frequencies. Theforced and free vibration tests were carried out with and without theER-TSD. By controlling the electric field, the ER-TSD can suppress thevibrations of the structure even when the natural frequency of thestructure changes. The free vibration responses of the structure with theER-TSD were analytically obtained by using a tuned mass damper model basedon the Housner theory. The simulated results appeared to be in reasonableagreement with experiments.
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