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Dinamska analiza sklopa teniškega loparja in roke med udarcem teniške žogice
ID Petrovič, Erik (Author), ID Čepon, Gregor (Mentor) More about this mentor... This link opens in a new window

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Abstract
Tenisači se pogosto srečujejo z izzivom izbire primernega teniškega loparja, ki bo najbolj ustrezal njihovemu načinu igranja. Z dinamskega vidika pri tem pomembno vlogo igra, kako se obremenitve prenašajo z loparja na tenisačevo roko. Teniški lopar je mogoče s spreminjanjem napetosti strun in dodatnimi obtežitvami prilagoditi zahtevam športnika. V prvem delu magistrskega dela smo z eksperimentalno modalno analizo karakterizirali lastno dinamiko teniškega loparja, pri čemer smo spreminjali napetost strun in obtežitev loparja. V drugem delu smo vzbujali teniški lopar z naključnim impulznim vzbujanjem (udarjanje žogice med igro) ter s kontroliranim vzbujanjem (s pomočjo modalnega kladiva in stresalnika). Rezultati prvega dela naloge so pokazali, da na dinamski odziv strun najbolj vpliva napetost strun; dinamski odziv okvirja pa najbolj enostavno spremenimo z dodajanjem mase (uteži). V drugem delu smo z metodo analize prenosnih poti uspešno določili obremenitve, ki delujejo na roko med vzbujanjem loparja z udarcem žogice ter pokazali, da se pri močnem držanju teniškega loparja med udarcem na roko prenese večja količina vibracij kot pri rahlem držanju ročaja teniškega loparja.

Language:Slovenian
Keywords:teniški lopar, forehand udarec, eksperimentalna modalna analiza, analiza prenosnih poti, nihajni način, ekvivalentna vzbujevalna sila
Work type:Master's thesis/paper
Organization:FS - Faculty of Mechanical Engineering
Year:2024
PID:20.500.12556/RUL-156005 This link opens in a new window
Publication date in RUL:27.04.2024
Views:59
Downloads:11
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Secondary language

Language:English
Title:Dynamic analysis of the tennis racket and hand assembly during tennis ball impact
Abstract:
For tennis players, choosing the right tennis racket can be quite difficult. The transfer of structural load from a tennis racket to a player's hand plays an important role. It is possible to slightly adjust a racket by changing racket weight and string tension. Therefore, we first performed the experimental modal analysis of a tennis racket by changing these parametres. Then we made random excitations of tennis racket by hitting the ball, and controlled excitations using a modal hammer and an electrodinamic shaker. The results showed that using pseudo-force-based transfer path analysis, we are able to predict the responses on the hand and the FRFs from tennis racket handle to the point on the hand. The results of the experimental modal analysis showed that the circular natural frequencies are the most affected by string tension. On the other hand, by changing racket weight we can affect the torsian and bending natural frequencies. By exciting the racket with electrodinamic shaker, we found out that the stronger a player holds the racket, the more vibrations is transfered to the hand.

Keywords:tennis racket, forehand, experimental modal analysis, transfer path analysis, mode shape, equivalent exciting force

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