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Proceedings Paper

Active and semiactive vibration damping of turbine blades with piezoceramics
Author(s): A. Hohl; M. Neubauer; S. M. Schwarzendahl; L. Panning; J. Wallaschek
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Paper Abstract

In this paper the damping capability of piezoelectric shunting is analysed for bladings. Beside the broadly used inductance-resistance networks, negative capacitance techniques are considered. For the validation of the theoretic results, a test rig with a model of a bladed disk with eight blades has been manufactured and equipped with two collocated piezoceramics at each blade. One of the piezoceramics is used as an actuator for an engine order excitation. The second piezoceramics is used for shunt damping. The experimental results of the test rig are compared with numerical results. Therefore, the structure and the piezoceramics are modeled in a finite element program. The modal excitation forces of the piezoelectric actuators are derived for all modes of the structure by a static analysis with a specific voltage applied to the piezoceramics. In addition, using the modal displacement field of the static analysis the modal excitation forces can be calculated. Furthermore, the number of degrees of freedom of the system is reduced by a modal reduction technique. The electrical behavior of the piezoceramics connected to each blade is modeled by one degree of freedom and coupled with the mechanical system described above. The different damping concepts are compared with respect of their effectiveness.

Paper Details

Date Published: 7 April 2009
PDF: 10 pages
Proc. SPIE 7288, Active and Passive Smart Structures and Integrated Systems 2009, 72881H (7 April 2009); doi: 10.1117/12.815800
Show Author Affiliations
A. Hohl, Institute of Dynamics and Vibration Research (Germany)
M. Neubauer, Institute of Dynamics and Vibration Research (Germany)
S. M. Schwarzendahl, Institute of Dynamics and Vibration Research (Germany)
L. Panning, Institute of Dynamics and Vibration Research (Germany)
J. Wallaschek, Institute of Dynamics and Vibration Research (Germany)


Published in SPIE Proceedings Vol. 7288:
Active and Passive Smart Structures and Integrated Systems 2009
Mehdi Ahmadian; Mehrdad N. Ghasemi-Nejhad, Editor(s)

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