208 Formulation of finite element model of a sport surface

Abstract

Various patterns of impact forces, impact durations, impact speeds and impact areas were observed in athlete's activities on the sport surfaces. Therefore, the study of shock absorption of the sport surfaces for evaluating the response property against the impact produced by the athlete activities is very important To evaluate these properties, the computer simulation method is very useful because it would be applicable to various conditions of impact, such as various impact area and impact shape. This study proposes the method for construction of Finite Element model to evaluate shock absorption properties in various conditions with multi-impact area and multi-shape contact surface. Parameters of physical property characterizing behavior of sport surface, a loss coefficient and an elastic coefficient in complex stillness model, are calculated from the experiment of steady excitation. We analyze and compare with multi intensity and multi impact area test by using Finite Element model.