Practical consideration of shear strain correction factor and Rayleigh damping in models of piezoelectric transducers

Pons, José L; Rodríguez, Humberto; Rocón, Eduardo; Fernández, J.F.; Villegas, M.

doi:10.1016/j.sna.2004.01.054

Cited by 12 publications

(10 citation statements)

References 10 publications

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“…Based on the frequency domain analysis, the phase A voltage excitation is defined as 200 × sin(2π × f ), the phase B voltage excitation is defined as 200 × cos(2π × f ), and f is 40.365 kHz. The material damping [24] is design by the damping ratio and frequency for modal analysis. The material parameters [25] of the piezoelectric ceramic sheet are:…”

Section: Transient Analysismentioning

confidence: 99%

Design and Analysis of Electromagnetic-Piezoelectric Hybrid Driven Three-Degree-of-Freedom Motor

Guo

Wang

et al. 2020

Sensors

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Multi-DOF movement actuators are widely used in industry, mainly in the fields of bionics and precision machining. With the non-stop improvement of modern-day industry, the requirements for the precision, integration and flexibility of multi-degree-of-freedom motion actuators in the industrial field have progressively increased. This paper presents a novel electromagnetic–piezoelectric hybrid driven three-degree-of-freedom motor. The driving method of the hybrid drive motor can be divided into electromagnetic driving and piezoelectric driving. The motor structure and working principle are analyzed. The structural parameters are obtained by modal analysis of the stators and rotor. The rationality of the stator structure is proved by using the transient analysis of the piezoelectric stators. The magnetic field characteristics of the motor are analyzed by both analytical method and the finite element method. The contact pressure and displacement between the piezoelectric stator and the rotor are analyzed by the analytical method. A motor drive model is established, which provides the basis for motor optimization design and control. Finally, a motor prototype and its test platform were built, and the experimental results are presented to verify the rationality of the motor design.

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Section: Transient Analysismentioning

confidence: 99%

Design and Analysis of Electromagnetic-Piezoelectric Hybrid Driven Three-Degree-of-Freedom Motor

Guo

Wang

et al. 2020

Sensors

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“…The linear attenuation coefficients are replaced for computational reasons by second-order approximations in the FEM model of the plane strain transducer array systems illustrated in Figure 1. These second-order attenuation coefficients are ordinary Rayleigh damping parameters and can be included directly in FEM schemes operating with only real numbers [30]. Rayleigh damping parameters which are exact at 15 MHz and 45 MHz are chosen, since they are relatively accurate approximations for frequencies between 10 MHz and 60 MHz (see Figure 6).…”

Section: Model Of a High-resolution Ultrasound Diagnostic Systemmentioning

confidence: 99%

Performance of an Ultrasonic Imaging System Based on a 45‐MHz Linear PVDF Transducer Array: A Numerical Study

Brodal

Melandsø

Jacobsen

2011

Advances in Acoustics and Vibration

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New designs of high-resolution ultrasonic imaging systems that operate in the 30–100 MHz region, for example, those based on linear transducer systems, are currently being investigated for medical purposes. Acoustic waves with frequencies in this range can detect microscopic structures in human tissue but will typically only penetrate a few mm because of large attenuation. However, this is sufficient for a diagnostic ultrasound scan of human skin. The signal-to-noise ratio and the focusing properties of the scanner are critical factors in dermatology, which are determined by the transducer design. A linear pulsed PVDF transducer array with a center frequency around 45 MHz is studied by applying numerical simulations, based on the finite element method (FEM), of this electromechanical system. Tx-beamforming properties of linear arrays with one, three, five, and seven active elements are investigated at different depths. The image quality obtained from synthetic Rx-beamforming, using responses from five electrodes, is estimated from reconstructed images of 25–100 m thick objects. The axial and lateral resolutions of these images are found to be similar with the Tx-beamforming resolution parameters estimated from the time-derivative of the pressure beams.

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“…An extended formulation of an eighteen-node assumed strain three-dimensional element was proposed to analyze fully coupled mechanical-electric problems [ 40 ]. The viscous damping and shear strain correction factors were introduced in an analytical electro-mechanical model of a piezoelectric transducer [ 41 ]. An efficient electromechanically coupled geometrically nonlinear zigzag theory was developed for the buckling analysis of hybrid piezoelectric beams under electro-thermo-mechanical loads [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modelling of Embeddable Piezoceramic Transducers

Huo

et al. 2017

Sensors

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Embedded Lead Zirconate Titanate (PZT) transducers have been widely used in research related to monitoring the health status of concrete structures. This paper presents a dynamic model of an embeddable PZT transducer with a waterproof layer and a protecting layer. The proposed model is verified by finite-element method (FEM). Based on the proposed model, the factors influencing the dynamic property of the embeddable PZT transducers, which include the material and thickness of the protecting layer, the material and thickness of the waterproof layer, and the thickness of the PZT, are analyzed. These analyses are further validated by a series of dynamic stress transfer experiments on embeddable PZT transducers. The results show that the excitation frequency can significantly affect the stress transfer of the PZT transducer in terms of both amplitude and signal phase. The natural frequency in the poling direction for the PZT transducer is affected by the material properties and the thickness of the waterproof and protecting layers. The studies in this paper will provide a scientific basis to design embeddable PZT transducers with special functions.

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Practical consideration of shear strain correction factor and Rayleigh damping in models of piezoelectric transducers

Cited by 12 publications

References 10 publications

Design and Analysis of Electromagnetic-Piezoelectric Hybrid Driven Three-Degree-of-Freedom Motor

Design and Analysis of Electromagnetic-Piezoelectric Hybrid Driven Three-Degree-of-Freedom Motor

Performance of an Ultrasonic Imaging System Based on a 45‐MHz Linear PVDF Transducer Array: A Numerical Study

Dynamic Modelling of Embeddable Piezoceramic Transducers

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