軟式野球ボールとバットの衝突シミュレーション(機械力学,計測,自動制御)

概要

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For a rubber baseball, which is a baseball made entirely of rubber, the softness of the ball makes it very difficult to increase the coefficient of restitution (COR) of the ball-bat impact by modifying the stiffness of the bat. In order to direct modification of the baseball bat, precise analysis of the impact phenomenon is required. In order to establish a powerfull tool for analyzing the baseball-bat impact, numerical analysis programs based on the three-dimensional finite element method have been developed. After verifying the developed programs by comparing calculated and experimental results, the impact characteristics of an aluminum bat in collision with a rubber baseball were investigated precisely. The results show that the COR decreases with increasing impact velocity, and that the COR is greatly affected by the hoop rigidity of the barrel of the bat, which has a hollow shell structure. Moreover, at high impact velocities, the COR is maximized at an impact location about 600 mm from the end of the bat handle.
社団法人日本機械学会の論文
2007-05-25