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The Vibration Analysis of Differential Tennis Racket Materials and Their Relation to Performance Control
racket;damping ratio;vibration;composite material
|Issue Date: ||2012-05-10T04:12:20Z
The purpose of this study was to analyze the vibration of differentialtennis racket grip materials. Five different kinds of tennis racket grip,their materials were composed by mixing carbon fiber and glass fiber in the ratio of 10 to 0, 7 to 3, 5 to 5, 3 to 7, and 0 to 10, were used in this study. All of them had the same weight, string tension, stiffness and balance. One experiment of the study was to test their vibration and the
other experiment was to distinguish performance control among using the five differ kinds of tennis racket. Two accelerometers (2000 Hz) and BioPAC system were used to acquire the vibrational signals. The impact of the tennis ball was set in the velocity of 4.09 m/s. Twelve elite athletes were served as the subjects to conduct the test of performance control of the forehand volley. The selected variables in the experiments were tested by one-way ANOVA at a=.05 significant level.
The results of this study indicated that the pure carbon fiber maderacket had a higher damping ratio on the center and off-center impact. The damping ratio was significantly decreased as the content of glass fiber in the racket was getting increased. On the other hand, the value of integral power spectrum was significantly increased. composition of tennis rackets, it concluded that by increasing the content of glass fiber in the racket, it would be increasing the load in the tennis player''s arm. Then, indirectly, this phenomenon would affect the athlete''s ability in performance control and this study significantly confirmed this conclusion.
|Relation: ||碩士; 國立體育學院運動科學研究所|
|Appears in Collections:||[體育學系] 專書|
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