Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
559612 | Mechanical Systems and Signal Processing | 2011 | 10 Pages |
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.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Signal Processing
Authors
T.S. Jang, Hyoungsu Baek, Hang S. Choi, Sun-Gu Lee,