Prediction of Table Tennis Racket Restitution Performance Based on the Impact Analysis

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概要

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• This paper investigated the physical properties of the racket and the ball, and predicted the impact force, the contact time, the deformation of ball and rubber, the coefficient of restitution and the racket rebound power associated with the frontal impact when the impact velocity and the impact location on the racket face are given. This study is based on the experimental identification of the dynamic characteristics of the ball-racket- arm system and an approximate nonlinear impact analysis, where the contact time is determined by the natural period of the whole system composed of the mass of the ball, the nonlinear stiffness of the ball and rubber, and the reduced mass of the handled racket at the impact location on the rubber face. Also considered is the energy loss during the impact. It was found that the racket rebound power peaks when the hitting point is 16 cm from the grip end of the racket and then decreases because of the mass distribution of the racket. The racket rebound power decreases remarkably with increasing impact velocity. Although the player's arm gives a remarkable effect on the reduced mass of racket, it does not give an effect on the rebound ball velocity because the mass of ball is too small compared to the mass of racket. This study enables us to predict quantitatively the various factors associated with frontal impact between a racket and a ball in table tennis.

• 日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」の論文

日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」 | 論文

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