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A Coupled Approach for Structural Damage Detection with Incomplete Measurements
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Author and Affiliation:
James, George(NASA Johnson Space Center, Houston, TX, United States);
Cao, Timothy(NASA Johnson Space Center, Houston, TX, United States);
Kaouk, Mo(NASA Johnson Space Center, Houston, TX, United States);
Zimmerman, David(Houston Univ., Houston, TX, United States)
Abstract: This historical work couples model order reduction, damage detection, dynamic residual/mode shape expansion, and damage extent estimation to overcome the incomplete measurements problem by using an appropriate undamaged structural model. A contribution of this work is the development of a process to estimate the full dynamic residuals using the columns of a spring connectivity matrix obtained by disassembling the structural stiffness matrix. Another contribution is the extension of an eigenvector filtering procedure to produce full-order mode shapes that more closely match the measured active partition of the mode shapes using a set of modified Ritz vectors. The full dynamic residuals and full mode shapes are used as inputs to the minimum rank perturbation theory to provide an estimate of damage location and extent. The issues associated with this process are also discussed as drivers of near-term development activities to understand and improve this approach.
Publication Date: Feb 11, 2013
Document ID:
20130009151
(Acquired Feb 10, 2013)
Subject Category: STRUCTURAL MECHANICS
Report/Patent Number: JSC-CN-27488
Document Type: Conference Paper
Meeting Information: International Modal Analysis Conference 31st; 11-14 Feb. 2013; Garden Grove, CA; United States
Financial Sponsor: NASA Johnson Space Center; Houston, TX, United States
Organization Source: NASA Johnson Space Center; Houston, TX, United States
Description: 14p; In English; Original contains color and black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: ALGORITHMS; COUPLED MODES; DAMAGE ASSESSMENT; DEGREES OF FREEDOM; DYNAMIC STRUCTURAL ANALYSIS; DYNAMICAL SYSTEMS; MATHEMATICAL MODELS; MODAL RESPONSE; PERTURBATION THEORY; STIFFNESS MATRIX; STRUCTURAL HEALTH MONITORING; VIBRATION MODE
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