Analysis and optimization of trimorph ring transducers

Chang, Shuo‐Hung; Lin, Jann-Fang

doi:10.1016/s0022-460x(02)01076-3

Cited by 11 publications

(2 citation statements)

References 20 publications

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“…When the resonance frequency of the bending ring transducer is closer to the resonance frequency of the liquid cavity, it results in a stronger amplification effect of the radiation sound field [12]. While several studies have investigated bending disc or ring transducers [13][14][15][16][17][18][19][20][21][22][23][24][25][26], most of them focused on deriving the resonant frequency and antiresonant frequency of disc or ring transducers with equal diameters. Consequently, when calculating the resonant frequencies of trilaminar bending ring transducers with unequal diameters, there can be a significant margin of error.…”

Section: Of 22mentioning

confidence: 99%

Analysis and Optimization of Bending Vibration Modes of a Trilaminar Bending Ring Transducer with Unequal Diameters

Zhu,

Dai,

Zhou

et al. 2023

Applied Sciences

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In this study, we propose a fast calculation method that utilizes Kirchhoff’s hypotheses and electroelasticity theory to derive the resonant frequency, antiresonant frequency, and effective electromechanical coupling coefficient of a trilaminar bending ring transducer with unequal diameters. The accuracy of the theoretical method is validated through finite element analysis (FEM) and experimental tests. Furthermore, we perform optimization of the effective electromechanical coupling coefficient of the first-order bending vibration of the trilaminar bending ring transducer. Our optimization results indicate that, under the free inner and fixed outer boundary conditions, the effective electromechanical coupling coefficient initially increases to a maximum value and then rapidly decreases as r1/r2 increases. This behavior can be attributed to the out-of-phase vibrations and the in-phase electric field excitation on both sides of the bending ring vibration nodal circle. Finally, we present the optimized size configuration required to achieve the maximum effective electromechanical coupling coefficient. This study provides theoretical guidance for the design and optimization of trilaminar bending ring transducers with unequal diameters and has the potential to significantly advance the field of crosswell seismic source technology.

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Section: Of 22mentioning

confidence: 99%

Analysis and Optimization of Bending Vibration Modes of a Trilaminar Bending Ring Transducer with Unequal Diameters

Zhu,

Dai,

Zhou

et al. 2023

Applied Sciences

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“…The frequency near open circuit condition is denoted as the antiresonance frequency, where the internal impedance is nearly the maximum. The dynamic EMCC, k , for the energy harvesting system is given by [14] ( )…”

Section: Performance Optimizationmentioning

confidence: 99%

Performance optimization for cantilevered piezoelectric energy harvester with a resistive circuit

Wang

Shan

Xie

2012

2012 IEEE International Conference on Mechatronics and Automation

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The power optimality performance of a piezoelectric energy harvester connected to a resistive load is studied. An analytical solution for the unimorph piezoelectric energy harvester based on the piezoelectric constitutive equations and the fundamental mechanics of materials relations is adapted to estimate the optimal power and vibration amplitude. The accuracy of the output performance in the analytical solution is identified from a coupled piezoelectric-circuit finite element analysis (FEA). The results from FEA are in agreement with numerical calculation results. Furthermore, the impact of structural damping and the electromechanical coupling on the optimal energy harvesting performance is studied. The results indicate that the electricity power output has two maximum values at lower damping ratio, and the power output exhibits only one maximum value at higher damping ratio. It is also shown that the piezoelectric materials with higher effective electromechanical coupling coefficient (EMCC) don't necessarily yield more power output.

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