Abstract
Because beam bumping is the problem for vibration and wave motion, it is necessary to consider the beam dimensions for elucidating its mechanism. In this paper, beam dumping experiments were carried out with 4 test pieces of different length and shapes to investigate the influences of support system, length and cross sectional area of the beam, and area of the rubber on the buffering effect of the shock absorbing rubber. It was revealed that bumping stress is largely affected by the beam length, and the bumping mechanism can be estimated successfully by the impedance method if mean stiffness of the shock absorbing rubber during bumping is known.
