Article ID Journal Published Year Pages File Type
722309 IFAC Proceedings Volumes 2006 6 Pages PDF
Abstract

In this paper, the new concept of Nonlinear Output Frequency Response Functions (NOFRFs) (Lang and Billings, 2005) is introduced. The potential of the use of the NOFRFs in detecting faults is demonstrated through studying the sensitivity of the NOFRFs to the change of stiffness ratios of a bilinear model which has widely used to model various nonlinear phenomena in engineering practices, including the presence of cracks in structures. The results show that the higher order NOFRFs are significantly sensitive to the stiffness ratio. This research study establishes an important basis for developing nonlinear approaches to the detection of faults in mechanical structures.

Related Topics
Physical Sciences and Engineering Engineering Computational Mechanics
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