A23 ローラ式ピッチングマシンにおけるボール縫い目の影響(野球2・他)

概要

論文の詳細を見る
A pitching machine of roller type for baseball achieves easily variable balls. On an official hard-baseball, having a seam, it is observed to affect variations in the ball's spin revolutions and the projected angle. In this study, a dynamic behavior and a contact stress state of the pitched ball with the baseball machine of roller type is analyzed using the commercial dynamic finite element code (ANSYS/LS-DYNA). In addition, their analysis results (provided the ball's speed and spin revolutions) were given as an initial condition, and the drag and lift force of a ball were analyzed by the computational fluid dynamics software (ANSYS/CFX). From these results, the trajectory of the ball for each posture was calculated. An effect of the throw accuracy by the ball with a seam was considered.
2006-11-08