Název:
Preliminary identification of damping properties of tonewood
Autoři:
Povolný, J. ; Kozánek, Jan ; Zapoměl, Jaroslav Typ dokumentu: Příspěvky z konference Konference/Akce: DYMAMESI 2019, Cracow (PL), 20190305
Rok:
2019
Jazyk:
eng
Abstrakt: Besides elasticity parameters, damping of the material is the crucial parameter of the function of a violin and also of other stringed instruments with a wooden soundboard. Assuming tonewood as an orthotropic linear elastic continuum, our aim is to contribute to hypothesis, that each orthotropic elastic constant has its appropriate loss factor - partial dampings. Dynamic experiments are based on the impulse excitation and the steady state harmonic response is calculated by Fourier transform of time-sampled measured signals (excitation and response). Frequency transfer function fitting identification method can determine complex modal and spectral eigen-parameters, mainly eigenfrequencies and eigendampings.
Klíčová slova:
damping; identification of eigenfrequencies and eigendampings; modal analysis; vibrating thin plate; violin Zdrojový dokument: The International Colloquium Dynamics of Machines and Mechanical Systems with Interactions : DYMAMESI 2019, ISBN 978-80-87012-70-3
Instituce: Ústav termomechaniky AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0301730