シンポジウム: スポーツ・アンド・ヒューマン・ダイナミクス講演論文集
Online ISSN : 2432-9509
セッションID: U00030
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複数のモードを同時に低減させるバット用ロッド型動吸振器の設計
*齊藤 幹長尾 裕史鷲田 雄大
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In baseball and softball, sting occurs in the batter’s hand when the batter hits off-center of the bat. In this study, we hypothesized that multiple vibrations have a composite effect on the sting experienced when hitting off-center of the bat, and that the influence of each mode varies depending on the grip position. We conducted a quantitative investigation of the relationship between sting and vibration when a ball was actually collided with a bat. The investigation was divided into two experiments. First, we measured the vibration in the grip when a ball was collided with a bat hung by a string. Second, we conducted a sensory evaluation of the strength of the sting when a subject simulated hitting a ball with a bat, and the ball was collided with the bat. From the results of the vibration measurements and the sensory evaluation, we considered that multiple vibration modes are related to the sting caused when hitting off-center of the bat. Based on this, we designed a lattice-style dynamic vibration absorber for bats that simultaneously reduces multiple vibration modes that cause sting.

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