抄録
We have studied the damping mechanism of a granular material damping system applied to reducing vibration in structures that have a high natural frequency and small vibration displacement. We considered the damping mechanism based on the vibration energy. We calculated the movement of the all granular materials and the container, the work by the collision, and the work by the friction. The work by the collision between the granular materials and the container has a big influence on the damping mechanism when the total mass of granular material is small. On the other hand, the influence of the work by the friction is increased in accordance with increase of the total mass of granular material. In this report, as a study for high attenuation of the granular material damper, we report the result of examining how the characteristics (density and friction coefficient) of the granular material affect attenuation characteristics of the granular material damper by calculation.
