TRIS Online Record

Title	DAMAGE DETECTION IN OFFSHORE STRUCTURES BY THE FRF METHOD
Accession No	00704772
Authors	Li, D; Zheng, Z
Publication Date	19920000
Languages	English
Abstract	This paper describes a method of structural damage detection using the frequency response function (FRF). A column and a row of the FRF matrix are required to be pre-measured and stored after the structural test has been completed. To detect damage in the structure at a later date, it is only necessary to measure the FRF of one or a few points as the observation signals. A calculation model using the observed signals and the FRF vectors pre-stored to identify the damage location and its severity is given. The least squares method is recommended to solve the identification equations. As an example, this method is used on a 1:30 model of an offshore structure and the artificial crack was discovered.
Supplemental Information	OMAE 1992, 11th Intl Conf on Offshore Mechanics & Arctic Engng; 7-12 June 1992; Calgary, Canada. Sponsored by ASME et al. Procs. Publ by ASME. Vol 1, Pt B, p 601 [4 p, 5 ref, 4 fig]
TRT Terms	Loss and damage ; Mathematical analysis ; Offshore structures
Other Terms	Damage
Document Source	British Maritime Technology Source Data: 93020461
TRIS Files	MRIS
Database	TRIS Online

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