Abstract
In this paper, a new type of arm-type damper with two links, two joints and a rotary damper has been developed. The damper is able to suppress six modes of vibration of a machine. The trial damper was made and the resisting force characteristics in the three translational directions were discussed theoretically and experimentally. The seismic responses of a three-degree-of-freedom system consisting of a mass and four coil springs and supported by the damper were measured using a two-dimensional electrohydraulic type shaking table. The experimental results are compared with the calculated ones, and the effects of vibration suppression of the damper are discussed.
