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ANALYTICAL AND EXPERIMENTAL STUDIES IN THE DEVELOPMENT OF
REDUCED-ORDER COMPUTATIONAL MODELS FOR NONLINEAR SYSTEMS
by
Farzad Tasbihgoo
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(CIVIL ENGINEERING)
December 2006
Copyright 2006 Farzad Tasbihgoo
Object Description
| Title | Analytical and experimental studies in the development of reduced-order computational models for nonlinear systems |
| Author | Tasbihgoo, Farzad |
| Author email | tasbihgo@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Civil Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2006-07-28 |
| Restricted until | Unrestricted |
| Date published | 2006-09-27 |
| Advisor (committee chair) | Masri, Sami F. |
| Advisor (committee member) |
Caffrey, John P. Anderson, James C. Ioannou, Petros A. Wellford, L. Carter |
| Abstract | This research work reports on an integrated approach, involving carefully conducted experimental tests on reconfigurable apparatuses, that allows the study of a broad class of generic nonlinear phenomena (such as dead-space, dry friction, hysteresis, limited-slip, etc.), that generates high-quality experimental measurements, for the subsequent development of high-fidelity, nonlinear, reduced-order, mathematical models of different formats, that are useful for the monitoring, control, and simulation of realistic nonlinear structural systems.; Progresses achieved in this study includes: (1) design, fabrication, assembly, instrumentation, calibration, and use of reconfigurable one- and two-dimensional test apparatuses, that allow the convenient testing of many important classes of nonlinear phenomena, both stationary as well as nonstationary in nature; (2) evaluation and extension of some useful system identification tools, involving parametric methods, such as the adaptive least-squares with the Bouc-Wen hysteresis model, as well as nonparametric methods, such as neural networks and polynomial-basis models, for dealing with realistic situations involving challenging hysteretic phenomena; (3) development of on-line monitoring schemes for large-scale viscous dampers, based on the adaptive least-squares with a forgetting-factor, in conjunction with two models: (a) the simplified design model, and (b) a polynomial-basis model; and (4) development and implementation of a methodology for utilizing data-based models of discrete nonlinear "joint" elements to create efficient system-level finite-element representations of multi-dimensional structures incorporating complex nonlinear elements. |
| Keyword | reduced-order; computational models; experimental; nonlinear systems; system identification |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Type | texts |
| Legacy record ID | usctheses-m43 |
| Contributing entity | University of Southern California |
| Rights | Tasbihgoo, Farzad |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@dots.usc.edu |
| Filename | etd-Tasbihgoo-20060927 |
| Archival file | uscthesesreloadpub_Volume4/etd-Tasbihgoo-20060927.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@dots.usc.edu |
| Full text | ANALYTICAL AND EXPERIMENTAL STUDIES IN THE DEVELOPMENT OF REDUCED-ORDER COMPUTATIONAL MODELS FOR NONLINEAR SYSTEMS by Farzad Tasbihgoo A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (CIVIL ENGINEERING) December 2006 Copyright 2006 Farzad Tasbihgoo |
