Evaluation of aerodynamic damping and natural frequencies from numerical simulations and experiments

0457858 - ÚT 2017 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Chládek, Štěpán - Horáček, Jaromír - Zolotarev, Igor
Evaluation of aerodynamic damping and natural frequencies from numerical simulations and experiments.
DYMAMESI 2016. Prague: Institute of Thermomechanics ASCR, v. v. i., 2016 - (Zolotarev, I.; Pešek, L.), s. 19-22. ISBN 978-80-87012-60-4.
[DYMAMESI 2016. Prague (CZ), 01.03.2016-02.03.2016]
Grant CEP: GA ČR GA13-10527S
Institucionální podpora: RVO:61388998
Klíčová slova: damping ratio and eigenfrequency estimation * fluid-structure interaction
Kód oboru RIV: BI - Akustika a kmity

The paper describes different ways for aerodynamic damping and natural frequencies evaluation in a problem of fluid-structure interaction. It is useful for both numerical simulations and experimental measurements. The Fourier transform is used for the frequency evaluation and the damping is evaluated both in time and frequency domain. Significant influence of the chosen sampling frequency and the length of time record on the accuracy of the results are demonstrated both in the numerical simulation and in the experiment that was performed with the flexibly supported profile NACA 0012 with two degrees of freedom.
Trvalý link: http://hdl.handle.net/11104/0258706