抄録
In recent years, buildings and houses are remarkable damaged by large scale earthquakes all over the world. And also, Japan is one of the countries that is occurring many earthquake. Therefore, the study to protect buildings and houses from collapse caused by earthquake has been conducted. In our laboratory, the small size spherical damper for houses was developed. This damper has the damping effect against 3dimensions. In this paper, the damping effect due to change of mass and volume of the spherical vibrator is confirmed. As a results diameter 32mm sphere damper with 50000[cSt] or 30000[cSt] silicon oil has the most damping effect. Differencing of damping effect changed by sphere of material mass is not confirmed.
