Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Shunts
B. Mokrani1, R Bastaits1, M. Horodinca2, I. Burda3, I. Romanescu2, A. Preumont1
1Université Libre de Bruxelles, Belgium,
2Technical University Gheorghe Asachi, Iasi, Romania
3Babes Bolyai University, Cluj-Napoca, Romania
This paper considers the RL shunt damping of rotationally periodic structures with an array of regularly spaced piezoelectric patches. The objective is to simplify the hardware, by reducing the demand on the inductors (and possibly eliminating the use of synthetic inductors). The paper compares two different ways of using the PZT array: independent loops and parallel loops. It is shown that, if a specific mode with n nodal diameters is targeted, mounting 4n PZT patches in two parallel loops is as efficient as mounting them in independent loops, while reducing considerably the demand on the inductors L in the circuits (by 2n^2). The strategy is first developed numerically and confirmed experimentally on a circular plate. The positive results reported in this paper open new possibilities in damping turbo machinery.
ACTUATOR 2014 Manuscript C2.1
Publication date: 09/04/2015
Manuscript C2.1 published in Conference Proceedings ACTUATOR 2014
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