Development of a Flexural Disk Transducer for Acoustic Tracking of Underwater Vehicles.
Abstract
A high frequency, broad-band transducer which has a broad radiation pattern in a half space is required for acoustic tracking of underwater vehicles. Two models of a flexural disk transducer, were built and tested. It was found that the radiation loading in water completely damps the resonances due to standing flexural waves and the radiation appears to be due entirely to flexural waves propagating in the disk. Broad-band radiation patterns and broad bandwidth (60-80 kHz) were obtained. The discrepancies between theory and experiment are attributed in part to violation of the thin plate assumptions and to lack of knowledge of the actual velocity distributions. This approach offers promise for achieving the desired broad beam widths. However, additional development work is needed to obtain a transducer which has the curved face necessary for smooth hydrodynamic flow. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1976
- Accession Number
- ADA038772
Entities
People
- Omer Sevdik
Organizations
- Naval Postgraduate School