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A new method for measuring nonharmonic periodic excitation forces in nonlinear damped systems

Cited 20 time in Web of Science Cited 21 time in Scopus
Authors
Jang, T. S.; Baek, Hyoungsu; Choi, Hang S.; Lee, Sun-Gu
Issue Date
2011-08
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Citation
MECHANICAL SYSTEMS AND SIGNAL PROCESSING; Vol.25 6; 2219-2228
Keywords
Nonlinear damped systemsNonharmonic periodic excitationForce identification
Abstract
The purpose of this study is to identify an external loading of long time duration, which is nonharmonic but periodic, acting on a nonlinear dynamic system with nonlinear restoring as well as nonlinear damping. A new procedure is proposed for the force identification through an inverse formalism. However, this involves a Volterra-type nonlinear integral equation of the first kind, which lacks solution stability. Therefore, the nonlinear dynamic system under investigation is transformed into a linear relation between forces and pseudo-displacements. The lack of solution stability is resolved by applying available regularization methods. The feasibility of the force identification is demonstrated through a numerical example. (C) 2011 Elsevier Ltd. All rights reserved.
ISSN
0888-3270
Language
English
URI
https://hdl.handle.net/10371/75101
DOI
https://doi.org/10.1016/j.ymssp.2011.01.012
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Architecture and Architectural Engineering (건축학과)Journal Papers (저널논문_건축학과)
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