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On the use of a roving body with rotary inertia to locate cracks in beams.
- Source :
-
Journal of Sound & Vibration . Jul2018, Vol. 425, p275-300. 26p. - Publication Year :
- 2018
-
Abstract
- Identifying cracks and damages in structures using measured vibrational characteristics has received considerable attention in the past few decades. The possibility of using frequency changes due to the application of a mass appended to the structure has also been considered. In this paper an analytical proof to show that the natural frequencies of a cracked beam with a roving body possessing mass and rotary inertia will generally change abruptly as the body passes over a crack, provided that the crack permits differential flexural rotations, is presented. A novel explicit closed form solution of the governing equation of an Euler-Bernoulli beam with a roving body possessing mass and rotary inertia, in the presence of multiple cracks is also proposed. The presented exact solution is used to conduct a parametric analysis of cracked beams. Numerical results for natural frequencies are provided and a procedure to exploit the occurrence of frequency shifts to detect and locate each crack, without having to perform any additional calculation, is described. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0022460X
- Volume :
- 425
- Database :
- Academic Search Index
- Journal :
- Journal of Sound & Vibration
- Publication Type :
- Academic Journal
- Accession number :
- 129648180
- Full Text :
- https://doi.org/10.1016/j.jsv.2018.03.020