The Dynamic Analysis of the Tennis Racket with the Ball Impact in the Different Area

Abstract

Have a large population because of being engaged in tennis, impact in ball and bat in the energy transfer produced, only some energy is changed into the kinetic energy that the ball rebounded, other energy will be consumed in the vibration of the ball, network thread and frame, among them the arm that the vibration of the frame certainly will be held bat by the human body is absorbed, load to cause arm produce tired to injure, certainly will absorb through bat transmission of bar by human body even, excessive load, cause arm weariness and strain, it is thereupon production to injure, probing into the vibration quality of bat becomes the very urgent theme, so this text aims at studying and striking the regional impact on vibration characteristic of tennis racket differently. Research this through experiment analytic approach, by accelerate rule amount of instrument and equipment waited for examine different to bump into area hold bat, take things vibration energy parameter on bat. This research obtains the important conclusion as follows: 1. In the impacting experiment of tennis racket, include driving board mode and node bending mode. 2. The natural frequency between 117Hz and 127Hz, amplitude and bending type that produce its have extensive, influence to arm. 3. The impacting area on the throat area, the vibration energy that the arm bears is biggest, secondly for the side area next for the tip area, it is the sweet district is minimum, so try not to deviate from the sweet districts in the batting area.