Document Type

Article

Publication Date

2012

Journal or Book Title

Ultrasonics

Volume

52

Issue

6

First Page

687

Last Page

693

DOI

10.1016/j.ultras.2011.10.012

Abstract

This paper examines guided wave transmission characteristics of plate stiffeners and their influence on the performance of acoustic noise source location. The motivation for this work is the detection of air leaks in manned spacecraft. The leaking air is turbulent and generates noise that can be detected by a contact-coupled acoustic array to perform source location and find the air leak. Transmission characteristics of individual integral stiffeners are measured across a frequency range of 50–400 kHz for both high and low aspect-ratio rectangular stiffeners, and comparisons are made to model predictions which display generally good agreement. It is demonstrated that operating in frequency ranges of high plate wave stiffener transmission significantly improves the reliability of noise source location in the plate. A protocol is presented to enable the selection of an optimal frequency range for leak location.

Comments

This is a post-print of an article published in Ultrasonics, 52, no. 6 (August 2012): 687–693, doi: 10.1016/j.ultras.2011.10.012.

Copyright Owner

Elsevier B.V.

Language

en

Date Available

November 16, 2012

File Format

application/pdf

Available for download on Saturday, January 01, 2800

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