Crack localisation in frames using natural frequency degradations

Labib, Amr, Kennedy, David ORCID: https://orcid.org/0000-0002-8837-7296 and Featherston, Carol Ann ORCID: https://orcid.org/0000-0001-7548-2882 2015. Crack localisation in frames using natural frequency degradations. Computers & Structures 157 , pp. 51-59. 10.1016/j.compstruc.2015.05.001

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Abstract

A new method is devised for locating a single crack in a frame using natural frequency degradations. Simulated noise free and contaminated natural frequency measurements are considered. The frame is discretised into a number of points. Selected natural frequencies are calculated using the Wittrick–Williams algorithm in the uncracked case and when the crack is placed at each point individually. The variation between the uncracked and cracked frequencies is normalised in the analytical and measured cases. Exact simulations yield point crack locations. Applying interval arithmetic, simulated contaminated measurements give crack location ranges. The combined ranges are illustrated by empirical probability distributions.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Additional Information:	Available online 29 May 2015
Publisher:	Elsevier
ISSN:	0045-7949
Date of Acceptance:	5 May 2015
Last Modified:	06 Jan 2024 03:55
URI:	https://orca.cardiff.ac.uk/id/eprint/76324

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