Accession Number:

ADA024448

Title:

Electroacoustic Modeling of Magnetostrictive Shells and Rings. Part 2. EIGSHIP Predicted Performance; Experimental Measurements; and Computer Listing of EIGSHIP.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Report Date:

1976-04-19

Pagination or Media Count:

187.0

Abstract:

The mathematical model of the electroacoustic performance of a force-driven free-flooding magnetostrictive cylinder shell used as an underwater sound transducer, originally developed in another report, has been coded into a computer program called EIGSHIP. This program is designed to predict electrical and mechanical impedances of the loaded shell, transmitting responses, electroacoustic efficiency, surface velocities, far-field beam patterns, and other relevant performance parameters. An experimental check on the prediction capabilities of EIGSHIP was undertaken on three specially constructed magnetostrictive shells which were tested under water load conditions in an indoor test facility. A full discussion of the comparison of predicted and measured performance is presented. The coded listing of EIGSHIP and instructions on its input requirements and output format are furnished in detail. Samples of typical computer runs are displayed and commented on.

Subject Categories:

  • Electrical and Electronic Equipment
  • Undersea and Antisubmarine Warfare
  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE