Dynamic Response of an Insonified Sonar Window Interacting with a Tonpilz Transducer Array
Abstract
This report derives and evaluates an analytical model of a sonar window in contact with an array of Tonpilz transducers. The window is fully elastic so that all wave components are present in the analysis. The system is insonified with a plane acoustic wave so that the sonar system is operating in an acoustic receive mode. The output of the model is a transfer function of a transducer element output voltage divided by input pressure versus arrival angle and frequency. This model is intended for analysis of sonar systems that are to be built or modified for broadband processing. The model is validated at low frequency with a comparison to a previously derived thin plate model. Once this is done, an example problem is studied so that the effects of higher order wave interaction with acoustic reception can be understood. It was found that these higher order waves can cause multiple nulls in the acoustic cone and that their locations in the arrival angle-frequency plane can be determined. The effect of these nulls in the beam pattern of the array is demonstrated. This analysis is beneficial because it shows where a sonar system can operate without being adversely effected by dynamic effects in the sonar window.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 03, 2007
- Accession Number
- ADA463290
Entities
People
- Andrew John Hull
Organizations
- Naval Undersea Warfare Center