Finite element model updating and damage detection using artificial boundary conditions

Download
Author
DeGregory, Christopher P.
Date
1999-03Advisor
Gordis, Joshua H.
Metadata
Show full item recordAbstract
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.
Collections
Related items
Showing items related by title, author, creator and subject.
-
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 ... -
Dynamic Characteristics of Liquid Motion in Partially Filled Tanks of a Spinning Spacecraft
Agrawal, B.N. (1993);This paper presents a boundary-layer model to predict dynamic characteristics of liquid motion in partially filled tanks of a spinning spacecraft. The solution is obtained by solving three boundary-value problems: an ... -
Artificial boundary conditions for model updating and damage detection
Gordis, Joshua H. (Monterey, California. Naval Postgraduate School, 1997);The updating of finite element models commonly makes use of measured modal parameters. The number of modal parameters measured in a typical modal test is small, while the number of model parameters to be adjusted can be ...