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Open AccessFeature PaperArticle

Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt

1
Department of Mechanical, Materials and Aerospace Engineering, University of Liverpool, Liverpool L69 3BX, UK
2
Department of Control Engineering and System Analysis, Active Structures Laboratory, Université Libre de Bruxelles, 1050 Brussels, Belgium
3
Department of Machine-Tools and Tools, Technical University Gheorghe Asachi, Iasi 700050, Romania
4
Physics Department, Babes Bolyai University, 400084 Cluj-Napoca, Romania
*
Author to whom correspondence should be addressed.
Actuators 2018, 7(3), 41; https://doi.org/10.3390/act7030041
Received: 28 May 2018 / Revised: 20 June 2018 / Accepted: 18 July 2018 / Published: 19 July 2018
(This article belongs to the Special Issue Piezoelectric Actuators 2018)
This paper considers the piezoelectric resistive and inductive RL shunt damping applied to rotationally periodic structures equipped with an array of regularly spaced piezoelectric patches. A method for simplifying the hardware, by reducing the size of the inductors and eliminating the use of synthetic inductors, is described. The paper compares two different ways of using the piezoelectric array: independent loops and parallel loops. It shows that, if a specific mode with n nodal diameters is targeted, mounting 4n piezoelectric patches in two parallel loops is as efficient as mounting them in 4n independent loops, while considerably reducing the demand on the inductors, L, (by 4n2). The method takes advantage of the mode shapes of rotationally periodic structures. The proposed method is validated numerically and experimentally on a rotationally periodic circular plate (nearly axisymmetric). The proposed technique is aimed at turbomachinery applications. View Full-Text
Keywords: vibration damping; piezoelectric shunts; RL shunt; blisks; axisymmetric structures; periodic structures vibration damping; piezoelectric shunts; RL shunt; blisks; axisymmetric structures; periodic structures
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MDPI and ACS Style

Mokrani, B.; Bastaits, R.; Romanescu, I.; Horodinca, M.; Burda, I.; Preumont, A. Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt. Actuators 2018, 7, 41.

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