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タイトル: ローラ式ピッチングマシンの投球シュミュレーションとその最適化に関する研究
その他のタイトル: A study on throw simulation for baseball pitching machine with rollers and its optimization
著者: 酒井, 忍 link image link image
北河, 勇一郎
金井, 亮 link image
尾田, 十八 link image
Sakai, Shinobu
Kitagawa, Yuichiro
Kanai, Ryo
Oda, Juhachi
発行日: 2008年12月
出版社(者): 日本機械学会 = the Japan Society of Mechanical Engineers
雑誌名: 日本機械学會論文集. C編 = Transactions of the Japan Society of Mechanical Engineers, Part C
ISSN: 0387-5024
巻: 74
号: 12
開始ページ: 2864
終了ページ: 2869
キーワード: Baseball
Experimental mechanics
Finite element method
Optimum design
Pitching machine
抄録: Pitching machine is widely used in venues ranging from professional baseball stadiums to batting centers. However, the throw performance of the pitching machines that have been developed so far for use during batting practice is not very high. Pitches such as the fastball, curveball and screwball are easily achieved by the pitching machine with three rollers which were developed by the authors. In this study, the moving behavior and contact stress state of the ball pitched with the three rollers type pitching machine is analyzed using dynamic finite element analysis software (ANSYS/LSDYNA). The effect of the seam of a baseball to the throw accuracy is analyzed numerically. In the analysis, the finite element models of a detailed baseball with a seam and a pitching machine with three rollers are used. Additionally, convex and concave rollers are made and those are analyzed. From the analytical results, it is understood that the convex roller is higher than other rollers in throw accuracy. The convex roller geometry is optimized, and the optimum conditions (shapes and material properties) of the convex roller are decided. Moreover, the validity of the condition is confirmed by the throw experiment.全文公開200912
URI: http://hdl.handle.net/2297/17362
資料種別: Journal Article
版表示: publisher

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/17362



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