Title page for ETD etd-01072003-143018


Type of Document Master's Thesis
Author Cundy, Amanda L.
Author's Email Address mtmandy79@hotmail.com
URN etd-01072003-143018
Title Use of Response Surface Metamodels in Damage Identification of Dynamic Structures
Degree Master of Science
Department Engineering Science and Mechanics
Advisory Committee
Advisor Name Title
Inman, Daniel J. Committee Co-Chair
Singh, Mahendra P. Committee Co-Chair
Batra, Romesh C. Committee Member
Hemez, F. M. Committee Member
Keywords
  • response surface metamodels
  • reduced order modeling
  • damage identification
Date of Defense 2003-01-07
Availability unrestricted
Abstract
The need for low order models capable of performing damage identification has become apparent in many structural dynamics applications where structural health monitoring and damage prognosis programs are implemented. These programs require that damage identification routines have low computational requirements and be reliable with some quantifiable degree of accuracy. Response surface metamodels (RSMs) are proposed to fill this need. Popular in the fields of chemical and industrial engineering, RSMs have only recently been applied in the field of structural dynamics and to date there have been no studies which fully demonstrate the potential of these methods. In this thesis, several RSMs are developed in order to demonstrate the potential of the methodology. They are shown to be robust to noise (experimental variability) and have success in solving the damage identification problem, both locating and quantifying damage with some degree of accuracy, for both linear and nonlinear systems. A very important characteristic of the RSMs developed in this thesis is that they require very little information about the system in order to generate relationships between damage indicators and measureable system responses for both linear and nonlinear structures. As such, the potential of these methods for damage identification has been demonstrated and it is recommended that these methods be developed further.
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