Abstract
We discuss the relationship between the damping characteristics and arrangement and motion of granular materials. Experimental investigation into the dynamic behavior of vibration system with granular materials has been carried out using forced vibration system with single degree of freedom. Firstly we evaluated the characteristics of vibration system with granular materials when the contact-angle of cylinders were changed. Secondly, we used square columns as granular materials and in this case the maximum damping effect was obtained.
