Temperature dependency of aluminum bar resonant frequency

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F08%3APU80098" target="_blank" >RIV/00216305:26110/08:PU80098 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Temperature dependency of aluminum bar resonant frequency
Original language description
This paper presents a method for measurement of resonant frequency of aluminum bar longitudinal vibration. This has been done using an electret microphone and computer with a soundcard. The oscillations have been induced by axial impact so the method isessentially impact-echo. The sound was analyzed by a specific software written in Python which calculated frequency spectrum and found several dominant peaks. These peaks represent fundamental frequency as well as higher harmonics. Moreover, the aluminumbar was tube-shaped with a resistance hot wire drawn along the center through all the length of a bar. The temperature changes have been measured by contact-less thermometer placed at the middle of the bar. Using this arrangement it has been measured how resonant frequency depends on temperature.
Czech name
Teplotní závislost rezonanční frekvence hliníkové tyče
Czech description
Článekpopisuje metodu pro měření rezonanční frekvence podélných kmitů.

Project
<a href="/en/project/GA103%2F06%2F1711" target="_blank" >GA103/06/1711: Defectoscopy of reinforced concrete elements and structures using non-linear acoustic spectroscopy</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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