Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21566
Title: Vibration analysis of annular-like plates
Authors: Cheng, L 
Li, YY
Yam, LH
Issue Date: 2003
Publisher: Academic Press
Source: Journal of sound and vibration, 2003, v. 262, no. 5, p. 1153-1170 How to cite?
Journal: Journal of sound and vibration 
Abstract: The existence of eccentricity of the central hole for an annular plate results in a significant change in the natural frequencies and mode shapes of the structure. In this paper, the vibration analysis of annular-like plates is presented based on numerical and experimental approaches. Using the finite element analysis code Nastran, the effects of the eccentricity, hole size and boundary condition on vibration modes are investigated systematically through both global and local analyses. The results show that analyses for perfect symmetric conditions can still roughly predict the mode shapes of "recessive" modes of the plate with a slightly eccentric hole. They will, however, lead to erroneous results for "dominant" modes. In addition, the residual displacement mode shape is verified as an effective parameter for identifying damage occurring in plate-like structures. Experimental modal analysis on a clamped-free annular-like plate is performed, and the results obtained reveal good agreement with those obtained by numerical analysis. This study provides guidance on modal analysis, vibration measurement and damage detection of plate-like structures.
URI: http://hdl.handle.net/10397/21566
ISSN: 0022-460X
EISSN: 1095-8568
DOI: 10.1016/S0022-460X(02)01093-3
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