Preliminary identification of damping properties of tonewood

0511140 - ÚT 2020 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Povolný, J. - Kozánek, Jan - Zapoměl, Jaroslav
Preliminary identification of damping properties of tonewood.
The International Colloquium Dynamics of Machines and Mechanical Systems with Interactions : DYMAMESI 2019. Prague: Institute of Thermomechanics CAS, 2019 - (Kozieň, M.; Zolotarev, I.; Pešek, L.), s. 43-50. ISBN 978-80-87012-70-3.
[DYMAMESI 2019. Cracow (PL), 05.03.2019-06.03.2019]
Institucionální podpora: RVO:61388998
Klíčová slova: vibrating thin plate * modal analysis * identification of eigenfrequencies and eigendampings * damping * violin
Obor OECD: Applied mechanics

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.
Trvalý link: http://hdl.handle.net/11104/0301730