Non-linear joint parameter identification using the frequency response function of the linear substructure

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A method based on frequency domain approaches is presented for the non-linear parameter identification of a structure having non-linear joints. The frequency response function (FRF) of the linear substructure, which can be calculated from the finite element method or measured by an experimental method, is used to calculate its FRFs needed in the parameter identification process. This method is easily applicable to a complex real structure having non-linear joints since it uses the FRF of the substructure. Since this method is performed in the frequency domain, the number of equations can be easily increased to as many as required to identify unknown parameters, not only by just varying the excitation amplitude but also by selecting the excitation frequencies. The validity of this method was tested numerically and experimentally with a cantilever beam having a non-linear element. It was verified through examples that the proposed method is useful to identify the non-linear joint parameters of a structure having arbitrary boundaries.
Publisher
PROFESSIONAL ENGINEERING PUBLISHING LTD
Issue Date
2004-09
Language
English
Article Type
Article
Keywords

NONPARAMETRIC IDENTIFICATION; VIBRATING STRUCTURES; ELEMENTS

Citation

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, v.218, no.9, pp.947 - 955

ISSN
0954-4062
DOI
10.1243/0954406041991314
URI
http://hdl.handle.net/10203/2538
Appears in Collection
ME-Journal Papers(저널논문)
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