Finite element model updating and damage detection using artificial boundary conditions

Loading...
Thumbnail Image
Authors
DeGregory, Christopher P.
Subjects
Advisors
Gordis, Joshua H.
Date of Issue
1999-03
Date
March, 1999
Publisher
Monterey, California: Naval Postgraduate School
Language
en_US
Abstract
An experimental test of a structure results in a database of frequency response functions from which natural frequencies and mode shapes are identified for the given boundary conditions of the test. The natural frequencies of a system under a variety of boundary conditions can be identified by applying artificial boundary conditions (ABCs) at measurement locations and obtaining the frequency response function for the unrestrained degrees of freedom. These frequencies are found without any physical alterations of the test boundary conditions. Use of the ABCs in sensitivity-based model updating and damage detection in conjunction with baseline data provides improved error localization and results in a more accurate finite element model.
Type
Thesis
Description
Series/Report No
Department
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
xiii, 79 p.;28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Collections