ABSTRACT
In this paper, the effects of some physical characteristics of a golf club head are investigated on its performance in order to develop a superior club head. Here the physical characteristics are the moment of inertia and the depth of the center of gravity; and the performances are the release velocity, the spin velocity of the ball and the size of the area of release velocity ratio. In the numerical analysis, several kinds of club head are modeled with different physical characteristics. For every club head model, the ball is hit from various impact points, and the performances are calculated. The results are as follows. When the moment of inertia increases, the spin velocity decreases and the release velocity increases. The size of the area of release velocity ratio also increases. When the moment of inertia around the horizontal or the vertical axis increases, the width in vertical direction or in horizontal direction increases, respectively. When the ball hits at the heel side or toe side, the bigger the depth of the center of gravity is, the bigger the spin velocity is. The sensitivities of the physical characteristics of club head on the performance, also, can be obtained.
