부산대학교 도서관

The Naval Research Laboratory is designing and prototyping ultra-compact, low frequency, high output sound projector panels for shallow water applications. The projectors are based on a sandwich composition of PZT-driven cymbal flextensionals between stiff cover plates. Laser Doppler vibrometer data of early 0.25-inch panel prototypes showed high displacements in air at frequencies below 1 kHz, and underwater testing yielded Q-2 resonances in the 2 kHz band. This talk presents efforts to more quickly advance from experimental prototypes to tailored designs, using PZFlex finite element modeling-virtual prototyping-to provide a better understanding of overall behavior, conduct quantitative parameter studies, and identify useful cymbal and panel arrangements.