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Optimal solution selection for sensitivity-based finite element model updating and structural damage detection

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Author
Renken, Jay A.
Date
1995-12
Advisor
Gordis, Joshua H.
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Abstract
The finite element model has become the standard way in which complex structural systems are modeled, analyzed, and the effects of loading simulated. A new method is developed for comparing the finite element simulation to experimental data, so the model can be validated, which is a critical step before a model can be used to simulate the system. An optimization process for finite element structural dynamic models utilizing sensitivity based updating is applied to the model updating and damage detection problems. Candidate solutions are generated for the comparison of experimental frequencies to analytical frequencies, with mode shape comparison used as the selection criteria for the optimal solution. The method is applied to spatially complete simulations and to spatially incomplete experimental data which includes the model validation of a simple airplane model, and the damage localization in composite and steel beams with known installed damage. (AN)
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/31366
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  • 1. Thesis and Dissertation Collection, all items

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    Artificial boundary conditions for model updating and damage detection 

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    Experimental validation of model updating and damage detection via eigenvalue sensitivity methods with artificial boundary conditions 

    Bouwense, Matthew D. (Monterey, California: Naval Postgraduate School, 2017-09);
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    Artificial boundary conditions for finite element model update and damage detection 

    Damanakis, Emmanouil (Monterey, California: Naval Postgraduate School, 2017-03);
    In structural engineering, a finite element model is often used to estimate its dynamic or static behavior, and in conjunction with measured data, to monitor the health of a structure. This research is focusing on the use ...
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