Local structural nonlinearities identification based on the minimum error linear frequency response function
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 16 October 2009
Abstract
Purpose
The purpose of this paper is to consider the dynamic characteristics identification of local structural nonlinearities.
Design/methodology/approach
Proposed identification method is based on minimum error linear frequency response function (MELF). Two different techniques are developed to extract nonlinear element's dynamic behavior from MELF. The first method, in which no pre‐assumed model is considered for the nonlinearity mechanism behavior, is called “direct identification method.” The second method is “model based identification method.”
Findings
Cubic stiffness dynamic characteristics are identified using the proposed techniques as a case study.
Originality/value
The paper shows that the proposed identification technique is simple and free of any sophisticated measurement hardwares and constraints, which is required by most of the methods proposed so far.
Keywords
Citation
Kashani, H. and Nobari, A.S. (2009), "Local structural nonlinearities identification based on the minimum error linear frequency response function", Aircraft Engineering and Aerospace Technology, Vol. 81 No. 6, pp. 522-528. https://doi.org/10.1108/00022660910997829
Publisher
:Emerald Group Publishing Limited
Copyright © 2009, Emerald Group Publishing Limited