Use of Natural Vibrations in Flaw Detection of Heat-Stressed Equipment

Use of Natural Vibrations in Flaw Detection of Heat-Stressed Equipment A method of nondestructive testing of the elements of a construction to which there is no direct access is presented. The method utilizes natural vibrations of the construction that have been excited by impacts of a special head of a hammer at specific spots. The method comprises a certain sequence that determines the position of the points of application of the impacts and measurements of the vibrations, the distribution of the frequencies of the vibrations by range, and the construction of a limited number of ranges of the spectrum of frequencies of the natural vibrations. The state of a controlled element of the construction is determined from the distributionof the frequencies of the natural vibrations in the spectrum. Results of experimental investigations of the inner jackets of eight nozzle heads by means of this method are presented. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Use of Natural Vibrations in Flaw Detection of Heat-Stressed Equipment

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media New York
Subject
Materials Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Materials
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-017-0042-y
Publisher site
See Article on Publisher Site

Abstract

A method of nondestructive testing of the elements of a construction to which there is no direct access is presented. The method utilizes natural vibrations of the construction that have been excited by impacts of a special head of a hammer at specific spots. The method comprises a certain sequence that determines the position of the points of application of the impacts and measurements of the vibrations, the distribution of the frequencies of the vibrations by range, and the construction of a limited number of ranges of the spectrum of frequencies of the natural vibrations. The state of a controlled element of the construction is determined from the distributionof the frequencies of the natural vibrations in the spectrum. Results of experimental investigations of the inner jackets of eight nozzle heads by means of this method are presented.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Apr 18, 2017

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