2002 Volume 35 Pages 21-26
This paper deals with an experimental investigation on damping capacity of structures packed with balls. Test structures are square pipes packed with glass balls. In the structures closely packed with balls, the vibration damping capacity is improved a little. The excitation packing is necessary for the close packing. However, this process is troublesome. Also, in the optimum packing ratio where the maximum damping capacity is obtained, the excitation packing is also inevitable. On the contrary, at 50 % packing ratio, this excitation packing process is not necessary, and a large damping capacity improvement is achieved. Therefore, the effect of shape and size of structure on the damping capacity is investigated at 50 % packing ratio. Moreover, the generation mechanism of damping capacity is discussed.
