The Influence of Boundary Condition and Collision Position on the Elastic Collision of Bar and Beam

Inhalt:
The collisions of elastic bar and elastic beam have been analyzed. It is already known that the collision phenomena of a bar and a beam will change from only a one-time collision pattern to two or more intermittent types of collision patterns, and these patterns are determined by 1) the mass ratio m1/m2, 2) the natural-frequency ratio in the first-order mode f21/f11 (or n11/n21), and 3) the collision position ratio lp / l2. Clarifying the collision phenomenon helps to decide the direction on material selection and shape design for building, bridge, baseball bat, etc. In this study, we analyzed how variation of the boundary of a beam (with both ends supported, and with both ends fixed) and the position ratio (center of beam, edge side of beam) influence the collision phenomena.