Abstract
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. In a previous study, assuming the same swing motion, the FEM model was used to determine the difference in deformation behavior of shafts with different kick points, and the results were compared among the participants in the experiment. The results showed that the kick point at which shaft deformation increased at impact differed among the participants. However, it was not possible to extract the difference in golf swing behavior that causes the difference in deformation. Therefore, the purpose of this study is to extract the golf swing motion that makes a difference in the deformation of the shaft at impact. First, a simulation model of shafts with different kick points was constructed using a finite element model. Next, golf swing motions were measured, and the deformation of shafts with different kick points was calculated. Participants who showed differences in deformation were grouped, and singular value decomposition was performed on the acceleration and angular velocity time series data, respectively. As a result, there was a clear difference in the time series data of the first mode among the groups.
