TITLE

Analytical and experimental investigation on eigenfrequency-based damage diagnosis of cantilever beam

AUTHOR(S)
Chong Yang; Zhixu Zhang; Shaoning Nong; Changchun Zhu
PUB. DATE
December 2016
SOURCE
Journal of Vibroengineering;Dec2016, Vol. 18 Issue 8, p5114
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
This paper presents two eigenfrequency-based damage diagnosis methods in a cantilever beam. The analytical relationship has been established between the eigenfrequency and damage parameters, including relative damage location and severity. On the premise that pre-damaged eigenfrequencies are known, a diagnosis algorithm without requirement of material properties is proposed based on change ratios of the first three eigenfrequencies. If pre-damaged eigenfrequencies are unfeasible to be acquired, a three-contour method based on only post-damaged eigenfrequencies is introduced to estimate damage parameters. The uniqueness of solution is discussed. Both the numerical simulation by the finite element method and the experiment on real beams are conducted and result in a good agreement between actual damage parameters and calculated values by using the proposed methods.
ACCESSION #
120525723

 

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