Damage detection by the distribution of predicted constraint forces

Salam Rahmatalla; Eun-Taik Lee; Hee-Chang Eun

doi:10.1007/s12206-012-0228-7

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Damage detection by the distribution of predicted constraint forces

Journal article

Peer reviewed

Damage detection by the distribution of predicted constraint forces

Salam Rahmatalla, Eun-Taik Lee and Hee-Chang Eun

Journal of Mechanical Science and Technology, Vol.26(4), pp.1079-1087

04/2012

DOI: 10.1007/s12206-012-0228-7

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Abstract

Damage causes the deterioration of dynamic and static performance of intact structures. Regarding the measured static displacement or modal displacement data as constraints for describing damaged responses, this study derives analytical equations to estimate constraint forces in the satisfaction of constraints. The constraint forces are forces required for describing the flexural shape of the damaged beam under static and dynamic loadings. Based on the concept that the occurrence of damage causes the change of force mechanism, this work proposes an analytical method to detect damage from the distribution of constraint forces. When compared to the displacement curvature and the frequency response function (FRF) curvature methods using 2% noise, the results have shown that the proposed method is less sensitive to noise and is more effective in detecting multiple damaged areas in the beam of short span length and their intensity at low levels of damage.

Mode curvature

Engineering

Vibration, Dynamical Systems, Control

Damage detection

Industrial and Production Engineering

FRF curvature

Mechanical Engineering

Constraint force

Data expansion

Modal data

Details

Title: Subtitle: Damage detection by the distribution of predicted constraint forces
Creators: Salam Rahmatalla - Department of Civil and Environmental Engineering The University of Iowa Iowa City IA 52242-1527 USA
Eun-Taik Lee - Department of Architectural Engineering Chung-Ang University Seoul 156-756 Korea
Hee-Chang Eun - Department of Architectural Engineering Kangwon National University Chuncheon 200-701 Korea
Resource Type: Journal article
Publication Details: Journal of Mechanical Science and Technology, Vol.26(4), pp.1079-1087
DOI: 10.1007/s12206-012-0228-7
ISSN: 1738-494X
eISSN: 1976-3824
Publisher: Korean Society of Mechanical Engineers; Heidelberg
Language: English
Date published: 04/2012
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Civil and Environmental Engineering; Injury Prevention Research Center
Record Identifier: 9983992039702771

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