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The Effect of Damper on Tennis Racket Handle Impact Force after Ball Impaction |
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| รหัสดีโอไอ | |
| Creator | 1. Mason Porramatikul 2. Thiti Meeopartmongkon 3. Boonsakdi Lorpipatana 4. Chalerm Chaiwatcharaporn 5. Tossaporn Yimlamai |
| Title | The Effect of Damper on Tennis Racket Handle Impact Force after Ball Impaction |
| Publisher | Text and Journal Publication |
| Publication Year | 2563 |
| Journal Title | Vajira Medical Journal |
| Journal Vol. | 64 |
| Journal No. | 3 |
| Page no. | 181-192 |
| Keyword | damper, vibration, peak force, ball impact location, tennis racket handle |
| URL Website | https://tci-thaijo.org/index.php/VMED |
| Website title | Vajira Medical Journal (วชิรเวชสาร) |
| ISSN | 0125-1252 |
| Abstract | Objective: To compare the peak force and vibration at tennis racket grip between different dampers and different tennis ball impact locations. Methods: The peak force and vibration was measured at tennis rackets grips between 4 different damping conditions which were no damper, button damper, rubber band damper and worm damper. Tennis balls were served using a tennis strike-simulating machine with speed 32m/s. The peak force were recorded from a wireless force transducer attached to the grip during four locations on string bed: center, above center, below center, and off-axis. Vibration was calculated form time domian using Fourier transform. Results: At a below center impact location, the button damper yielded a 10% reduction in some harmonic of the racket's vibration from 191.7 ? 2.6 Hz to 172.9 ? 2.8 Hz (p =0.001), the rubber band damper yielded a 8% reduction from 191.7 ? 2.6 Hz to 176.8 ? 4.4 Hz (p = 0.005), whereas the worm damper yielded a 7% reduction from 191.7 ? 2.6 Hz to 178.8 ? 3.8 Hz (p = 0.011). No significant effect of damper types on the vibration with the others impacts location. These dampers did not reduce the impact force at the grip regardless of the location. Conclusion: Damper reduced the racket's vibration when the ball impacts a below center position. |
