Efforts to extract movements during a swing that change the deformation behavior of the shaft

Abstract

Golf is a sport that can be enjoyed by people of all ages. The appeal of golf is not only the competition of scores, but also the feeling of satisfaction that comes from hitting an accurate shot. For accurate shots, it is necessary to use a club that is suitable for each individual swing. Just as the swing is different for each golfer, the deformation behavior of the shaft during the swinging motion is also considered to be different for each golfer. Therefore, several researches has been conducted on swing motion and shaft deformation behavior to select the appropriate club for swinging, but the swing motion that makes a difference in deformation behavior has not been clarified. Therefore, the objective of this study is to extract the golfer's swing motion that gives characteristic differences in the deformation behavior of the shaft. First, a simulation model that reproduced the deformation behavior of the shaft was constructed using FEM. The deformation behavior of the shaft was calculated using the simulation model, and differences in deformation behavior among each golfer. Next, wavelet analysis was applied to the golfer's swing motion to confirm the temporal variation of the frequency band during the swing motion. Finally, the results of the wavelet analysis were used to extract differences in the swinging motion that cause differences in the deformation behavior.