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Updated: Jul 7, 2026
07:02
Investigating the Potential of Singly Curved Thin Piezoelectric Transducers for Energy Harvesting and Structural Health Monitoring
Published on: November 14, 2025
A coupled-mode theory for periodic piezoelectric composites
F Craciun1, L Sorba, E Molinari
1Istituto di Acustica, CNR, Rome.
Summary
This study proposes a coupled oscillator model for piezoelectric composite plates, crucial for ultrasonic transducers. The model accurately predicts resonance frequencies by coupling thickness and lateral resonances, offering a criterion to prevent interference.
Area of Science:
- Materials Science
- Acoustics
- Solid State Physics
Background:
- Piezoelectric composite plates are essential components in ultrasonic transducers.
- Understanding their resonance spectrum is critical for optimizing transducer performance.
- Existing models may not fully capture the complex interplay of different resonant modes.
Purpose of the Study:
- To develop a coupled oscillator model for calculating the resonance spectrum of 1D piezoelectric composite plates.
- To analyze the coupling between thickness resonance and lateral resonance.
- To establish a criterion for phase distribution to avoid spurious lateral resonances near thickness resonance.
Main Methods:
- A coupled oscillator model was developed.
- The Kronig-Penney model was employed to calculate lateral resonances.
- An effective medium model was used to determine thickness resonance.
- A biquadratic equation described the coupling between the two modes.
Main Results:
- The model successfully calculates the resonance spectrum of the piezoelectric composite plate.
- The coupling of thickness and lateral resonances is accurately described by a biquadratic equation.
- A criterion was derived to prevent spurious lateral resonances from interfering with thickness resonance.
Conclusions:
- The proposed coupled oscillator model provides an effective method for analyzing piezoelectric composite plate resonances.
- The findings are crucial for the design and optimization of ultrasonic transducers.
- The derived criterion aids in achieving desired resonance characteristics by managing mode interference.
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