A modified complex modal testing technique for a rotating tire with a flexible ring model

Natural frequencies, mode shapes and modal damping values are the most important parameters to describe the noise and vibration behavior of a mechanical system. For rotating machinery, however, the directivity of the propagation wave of each mode should also be taken into account. For rotating syste...

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Bibliographic Details
Published in:Mechanical systems and signal processing 2015-08, Vol.60-61, p.604-618
Main Authors: Lee, Jongsuh, Wang, Semyung, Pluymers, Bert, Desmet, Wim, Kindt, Peter
Format: Article
Language:English
Subjects:
Complex modal testing
Directivity
Forward and backward waves
Mathematical models
Mechanical systems
Modal damping
Resonant frequency
Rotating
Rotating tire analysis
Tire dynamics
Tires
Vibration
Wave propagation
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Summary:Natural frequencies, mode shapes and modal damping values are the most important parameters to describe the noise and vibration behavior of a mechanical system. For rotating machinery, however, the directivity of the propagation wave of each mode should also be taken into account. For rotating systems, this directivity can be determined by complex modal testing. In this paper, a rolling tire is represented as a flexible ring model. The limitation of application of the complex modal testing which requires two directional measurements at a certain point, which is difficult to measure in practice, has been overcome through a modified complex modal testing which requires only one directional measurements at any two points. The technique is described in detail and applied to both a numerical example and to an experimental data set of a real rotating tire.
ISSN:0888-3270
1096-1216
DOI:10.1016/j.ymssp.2014.12.002