Finite element based structural damage detection using artificial boundary conditions
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Authors
Arteaga, Rafael A. Lagunes.
Subjects
Advisors
Gordis, Joshua H.
Date of Issue
2007-09
Date
Publisher
Monterey California. Naval Postgraduate School
Language
Abstract
Finite element models can be used to discern the location and severity of damage in structures. This is frequently pursued by using the differences in measured and computed natural frequencies, in conjunction with the sensitivities calculated using the FE model. Given that a modal test produced a limited number of natural frequencies for a structure, the concept of Artificial Boundary Conditions (ABC) was developed, which yields additional natural frequency information for a structure. This is accomplished by artificially imposing additional boundary conditions to the measured data. In this thesis, the use of ABC to produce an improved set of structural sensitivities is explored. It is shown that the selection of ABC sets is best guided by the strain energy distribution in the structure.
Type
Thesis
Description
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xviii, 163 p. : col. ill. ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.