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|Title:||Modification of fundamental vibration modes of circular plates with free edges|
|Authors:||Duan, W.H. |
|Citation:||Duan, 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. https://doi.org/10.1016/j.jsv.2008.03.065|
|Abstract:||For 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.|
|Source Title:||Journal of Sound and Vibration|
|Appears in Collections:||Staff Publications|
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