FEM Modeling of Electromechanical Impedance for the Analysis of Smart Damping Treatments

Providakis, C. P.; Voutetaki, Maristella E.; Stauroulaki, M. E.; Kontoni, D.P.N.

doi:10.1007/1-4020-5261-8_22

“…The constitutive equations of the PZT patch are [16][17][18]: where S X and S Y are strains, T X and T Y are stresses,Ē PZT = E PZT (1 + ni) is the elastic modulus at zero electric field, n is the mechanical loss factor, ν PZT is the Poisson's ratio, d 31 and d 32 are the piezoelectric constants in the x and y directions, respectively,ε T 33 = ε T 33 (1 − δi) is the dielectric constant at zero stress, D is the electric displacement, δ the dielectric loss factor and i = √ −1. The electric current passing through the PZT patch can be considered to be given by…”

Section: Electromechanical (E/m) Admittancementioning

confidence: 99%

“…The idea here is an extension of other works of the present authors [16,17]. It is focused to find out the required PZT actuator input voltages to produce a desired vibration reduction at pre-selected locations of the vibrating structure.…”

Section: Vibration Reduction Using E/m Admittance Signaturementioning

confidence: 99%

Spin-Wave Resonance in Conducting Films: Parallel Resonance

Wames¹,

Wolfram²

1974

Jpn. J. Appl. Phys.

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The present work considers the possibility of vibration control of a distributed dynamical system, such as flexible plates using local piezoelectric (PZT) actuators/sensors and the electromechanical admittance concept. When PZT actuators bonded on structures are used in active vibration and acoustic control, the desired deformation field in the structure is obtained through the application of localized line forces and moments generated by applying an appropriate electrical field on the outer surfaces of the PZT patches. The electromechanical admittance generated at the electrical terminals of a PZT-driven smart structure is then extracted to synthesize a desired damping performance. This is achieved by a FEM-based minimization of the difference between the computed and the desired electromechanical admittance signature for investigated frequency ranges.

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“…The constitutive equations of the PZT patch are [16][17][18]: where S X and S Y are strains, T X and T Y are stresses, ĒPZT = E PZT (1 + ni) is the elastic modulus at zero electric field, n is the mechanical loss factor, ν PZT is the Poisson's ratio, d 31 and d 32 are the piezoelectric constants in the x and y directions, respectively, εT 33 = ε T 33 (1 − δi) is the dielectric constant at zero stress, D is the electric displacement, δ the dielectric loss factor and i = √ −1. The electric current passing through the PZT patch can be considered to be given by…”

Section: Electromechanical (E/m) Admittancementioning

confidence: 99%

Development of an electromechanical admittance approach for application in the vibration control of intelligent structures

Providakis

¹

,

Kontoni²,

Voutetaki

³

2007

Smart Mater. Struct.

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The present work considers the possibility of vibration control of a distributed dynamical system, such as flexible plates using local piezoelectric (PZT) actuators/sensors and the electromechanical admittance concept. When PZT actuators bonded on structures are used in active vibration and acoustic control, the desired deformation field in the structure is obtained through the application of localized line forces and moments generated by applying an appropriate electrical field on the outer surfaces of the PZT patches. The electromechanical admittance generated at the electrical terminals of a PZT-driven smart structure is then extracted to synthesize a desired damping performance. This is achieved by a FEM-based minimization of the difference between the computed and the desired electromechanical admittance signature for investigated frequency ranges.

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“…The idea here is an extension of other works of the present authors [9]. It is focused to find out the required PZT actuator input voltages to produce a desired healthy structure's (E/M) admittance signature at pre-selected locations of the vibrating structure.…”

Section: Of Cracked Structure Using Electromechanical Admittance Sign...mentioning

confidence: 99%

Repair of Cracked Structures under Dynamic Load Using Electromechanical Admittance Approach

Providakis

¹

2007

KEM

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In the present paper, the repair of a cracked structure under dynamic load using the electromechanical admittance (EMA) approach is investigated. Conceptually, appropriate electrical field are applied on the outer surfaces of piezoelectric (PZT) patches to effect closure of the crack. This has the effect of altering the electromechnaical (E/M) admittance signature, extracted at the electrical terminals of a specific PZT patch, considered as an admittance calculating sensor (ACS) patch, towards that of the healthy structure, which is the criterion concept used for the repair in this paper. To demonstrate the present repair methodology, a cantilever 3D beam numerical example is considered in combination with a FEM-based minimization of the difference between the healthy and cracked structure’s (E/M) admittance signature, for specific frequency ranges.

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FEM Modeling of Electromechanical Impedance for the Analysis of Smart Damping Treatments

Cited by 4 publications

References 14 publications

Spin-Wave Resonance in Conducting Films: Parallel Resonance

Spin-Wave Resonance in Conducting Films: Parallel Resonance

Development of an electromechanical admittance approach for application in the vibration control of intelligent structures

Repair of Cracked Structures under Dynamic Load Using Electromechanical Admittance Approach

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