Excitation of a nonmetallic plate with two integrated external piezoelectric structures
Journal
Active and Passive Smart Structures and Integrated Systems XX
Part Of
Proceedings of SPIE - The International Society for Optical Engineering
Journal Volume
13946
Start Page
139460Q
ISSN
0277786X
ISBN (of the container)
9781510698338
ISBN
9781510698338
Date Issued
2026-04-16
Author(s)
Abstract
Generating ultrasonic vibrations on substrates is of significant interest in structural dynamics and wave propagation studies. This work reports on the design, modeling, and experimental validation of using two external piezoelectric structures to induce ultrasonic out-of-plane vibrations on a rectangular non-metallic plate. The proposed system consisted of two piezoelectric unimorphs bonded to a non-metallic substrate. The x-direction edges were clamped, while the y-direction were free edges. The seventh and ninth bending modes were selectively excited using a single-frequency driving approach. A theoretical model of equivalent length combined with the Ritz method was developed to estimate the resonant frequencies, and a finite element method was used for verification. It was found that errors of 1.45% for the seventh mode and 1.60% for the ninth mode relative to the theoretical values. To verify the modal behavior, experimental analysis using a powder sprinkling method confirmed the excitation of the intended ultrasonic out-of-plane vibrations. The seventh and ninth bending modes were successfully excited, and the measured resonant frequencies were 21.5kHz and 34.7kHz, respectively. We demonstrated that precise modal excitation can be achieved through an integrated external structure, offering a practical approach for exciting ultrasonic vibrations in a planar non-metallic plate.
Event(s)
20th Active and Passive Smart Structures and Integrated Systems, 16 March 2026 - 18 March 2026, Vancouver
Subjects
modal excitation
piezoelectric actuator
plate vibration
ultrasonic vibrator
Publisher
SPIE
Type
conference paper