CUED Publications database

Feasibility of damage detection using vibration data in a population of cylinders

Marwala, T and Hunt, HEM (2000) Feasibility of damage detection using vibration data in a population of cylinders. Proceedings of SPIE - The International Society for Optical Engineering, 4062. I/-I/. ISSN 0277-786X

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Abstract

The feasibility of vibration data to identify damage in a population of cylindrical shells is assessed. Vibration data from a population of cylinders were measured and modal analysis was employed to obtain natural frequencies and mode shapes. The mode shapes were transformed into the Coordinate Modal Assurance Criterion (COMAC). The natural frequencies and the COMAC before and after damage for a population of structures show that modal analysis is a viable route to damage identification in a population of nominally identical cylinders. Modal energies, which are defined as the integrals of the real and imaginary components of the frequency response functions over various frequency ranges, were extracted and transformed into the Coordinate Modal Energy Assurance Criterion (COMEAC). The COMEAC before and after damage show that using modal energies is a viable approach to damage identification in a population of cylinders.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:30
Last Modified: 27 Nov 2014 19:23
DOI: