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dc.titleModification of fundamental vibration modes of circular plates with free edges
dc.contributor.authorDuan, W.H.
dc.contributor.authorWang, C.M.
dc.contributor.authorWang, C.Y.
dc.identifier.citationDuan, W.H., Wang, C.M., Wang, C.Y. (2008-11-11). Modification of fundamental vibration modes of circular plates with free edges. Journal of Sound and Vibration 317 (3-5) : 709-715. ScholarBank@NUS Repository.
dc.description.abstractFor an isotropic circular plate with constant thickness and free edges, its fundamental vibration mode takes the form of a twisting mode with two nodal diameters, i.e. n=2. In certain applications, it may be necessary to have an axisymmetric shape for the fundamental vibration mode (i.e. mode shape with no nodal diameter, n=0). In this paper, we show that such an axisymmetric vibration mode can be realized by increasing the bending rigidity of the outer rim of the circular plate by using a larger thickness or by using a material with a larger Young's modulus or both. We also determine the critical flexural rigidity of the outer rim that will trigger this vibration mode change from n=2 type to n=0 type for a given rim width. The ability to alter the mode shape of circular plates with free edges has useful applications in sensing and actuating devices and large pontoon-type floating circular structures. © 2008 Elsevier Ltd. All rights reserved.
dc.contributor.departmentCIVIL ENGINEERING
dc.description.sourcetitleJournal of Sound and Vibration
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