Parallel Piezoelectric Shunt Damping of Rotationally Periodic Structures

Mokrani, Bilal; Bastaits, Renaud; Horodincă, Mihăiţă; Romanescu, Iulian Ilie; Burda, Ioan; Viguié, Régis; Preumont, André

doi:10.1155/2015/162782

Cited by 33 publications

(36 citation statements)

References 18 publications

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“…The proposed approach offers a practical solution (with fully passive components) to the shunt damping of targeted modes in rotating structures, thus avoiding the use of synthetic inductors. The presented approach was validated on a bladed drum typical of turbomachinery in a separate study [16].…”

Section: Discussionmentioning

confidence: 99%

“…If a number, 2n, of patches are symmetrically located in such a way that they have the same fraction of modal strain energy for the targeted mode, ω i , K 2 i is multiplied by 2n, and it can be shown that the optimum resistance is multiplied by √ 2n compared to the case with a single transducer [17]. The optimal resistance, R, which maximizes the damping of the targeted mode, is thus given by…”

Section: Sine Modementioning

confidence: 99%

“…The generalized electromechanical coupling factor of each patch was identical for both the sine and the cosine modes with three nodal diameters. It is given by [17]:…”

Section: Numerical Simulationmentioning

confidence: 99%

“…The demonstration is limited to a circular plate equipped with 12 piezoelectric transducers. Implementation on a bladed drum, typical of turbomachinery, has been presented in [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt

et al. 2018

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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 4n 2 ). 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.

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Section: Discussionmentioning

confidence: 99%

Section: Sine Modementioning

confidence: 99%

“…The generalized electromechanical coupling factor of each patch was identical for both the sine and the cosine modes with three nodal diameters. It is given by [17]:…”

Section: Numerical Simulationmentioning

confidence: 99%

“…The demonstration is limited to a circular plate equipped with 12 piezoelectric transducers. Implementation on a bladed drum, typical of turbomachinery, has been presented in [15,16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt

et al. 2018

Self Cite

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“…In addition, experiments were carried out to verify theoretical results. Reference [16] used the shape of the targeted mode to organize the piezoelectric patches as a modal filter, which decreases the necessary inductors in the shunted circuit. Their method was first illustrated experimentally on a circular plate and then used in a prototype of an industrial bladed drum.…”

Section: Introductionmentioning

confidence: 99%

A Modified Nonlinear Modal Synthesis Scheme for Mistuned Blisks with Synchronized Switch Damping

Liu

Fan

et al. 2018

International Journal of Aerospace Engineering

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In the authors' previous work (MSSP 2017), we show that the synchronized switch damping based on negative capacitor (SSDNC) is a good candidate for vibration suppression of tuned blisks. In this paper, we consider the mistuned case and propose an efficient numerical approach to accelerate the required statistical analysis. Although SSDNC is a type of nonlinear piezoelectric damping, through an in-depth nonlinear modal analysis, we show that the modal information of the system remains unchanged with respect to the nonlinear modal amplitude. Based on this, an accelerated nonlinear component modal synthesis (NCMS) method is proposed to predict and further analyse the dynamic characteristics of the nonlinear system. The precision and efficiency of the proposed method is compared with that of the multiharmonic balance method. The stochastic characteristics of the blisk are studied with two sources of mistuning. The first one is random stiffness mistuning and the second one is capacitance mistuning. The investigation is carried out with different mistuning levels and under different engine-order excitations. The results show that the NCMS method can accurately predict the forced response of the mistuned blisk with SSDNC, and the calculation cost can be considerably reduced. Two advantages of the SSDNC technique applied to the mistuned blisk have been revealed in the statistical view. The first one is that the SSDNC can suppress the amplified vibration induced by the mistuning of the blisk significantly. The second one is that the vibration-suppression performance of SSDNC is insensitive to the mistuning of the blisk and that of the electrical circuits.

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High modal density active vibration attenuation of bladed structure with a decentralized optimal negative derivative feedback controller

Jamshidi

Paknejad

Collette

2022

Structural Contr & Hlth

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In this study, an active vibration mitigation of bladed structures with piezoelectric patches utilizing decentralized negative derivative feedback (NDF) controllers is evaluated numerically and experimentally. Such structures have protruding identical blades, which create numerous modes in a short interval of frequency named as high modal density or mode family. Therefore, mitigating these modes is quite challenging. As a case study, a bladed rail is considered with 5 blades, which subsequently has 5 modes in a family of mode in a very short frequency range. A numerical model of the bladed rail including 5 pairs of piezoelectric patches (sensors and actuators) is extracted. Afterwards, a decentralized NDF controller is designed based on maximum damping and H 2 method for this model, which is desirable for reducing vibration corresponding to the first family mode. The numerical results show a perfect performance of the proposed controller on high modal density vibration attenuations. For validating these results, two separate bladed rails have been manufactured, and different piezoelectric patches have been attached to them. The same procedure for designing NDF controller has been done for both of the structures. Experimental results show that the family mode of the bladed rail is completely damped using decentralized NDF controller. Even though the pole-zero patterns change from the first structure to the second one, the controller can easily mitigate the family mode vibration flawlessly. This shows high applicability of proposed controller on mitigating high modal density modes. K E Y W O R D S bladed rail, decentralized controller, family mode, high modal density, negative derivative feedback (NDF), piezoelectric sensor/actuators 1 | INTRODUCTION Bladed structures are very common in various industries like aviation and turbomachinery industry. The new modernized industry is focusing on the development of energy-efficient structures to reduce the fuel consumption, currently. Therefore, lightweight structures with materials such as aluminum are extensively used, in these applications. While

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Parallel Piezoelectric Shunt Damping of Rotationally Periodic Structures

Cited by 33 publications

References 18 publications

Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt

Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt

A Modified Nonlinear Modal Synthesis Scheme for Mistuned Blisks with Synchronized Switch Damping

High modal density active vibration attenuation of bladed structure with a decentralized optimal negative derivative feedback controller

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