Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration

0443175 - ÚT 2016 RIV PL eng J - Journal Article
Pešek, Luděk - Půst, Ladislav - Bula, Vítězslav - Cibulka, Jan
Application of Piezofilms for Excitation and Active Damping of Blade Flexural Vibration.
Archives of Acoustics. Roč. 40, č. 1 (2015), s. 59-69. ISSN 0137-5075. E-ISSN 2300-262X
Institutional support: RVO:61388998
Keywords : vibration suppression * parametric antiresonance * active damping * PVDF films
Subject RIV: BI - Acoustics
Impact factor: 0.661, year: 2015

For laboratory tests of the blades, the piezo actuators placed on the blades, unlike electromagnets placed in the stationary space, give a possibility to excite the flexural vibration of the blades within the bladed disk by time continuous forces independently of the rotor revolutions. In addition, the piezo actuators can be also used to control the vibrations of the blade. Therefore, several dynamic experiments of the clamped model blade equipped with PVDF films were performed for the force description of the piezo foils and their behavior as actuators of the blade vibration. The numerical beam models were used for numerical analysis of the vibration suppression effects both by additional parametric excitation and by active damping. The optimal phase shift of piezo actuator voltage supply was ascertained both for amplitude amplification and suppression. The results contribute to the knowledge of the actuation and active damping of blade vibration by the piezo elements.
Permanent Link: http://hdl.handle.net/11104/0245919