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Proceedings Paper

Modal properties of annular plates vibrating in water
Author(s): Marco Amabili
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Paper Abstract

Modal tests were conducted on three annular plates with different ratio between inner and outer radius, both in air, a condition very close to vacuum, and completely immersed in water, in order to obtain modal properties. It is to note that only data on natural frequencies of vibration in vacuum are available in scientific literature. An advanced experimental apparatus based on a single-beam laser vibrometer and on a scanning laser vibrometer was satisfactorily used for tests in air and in water. Experiments confirmed that natural frequencies are strongly reduced due to the interaction between water and plate. Therefore the NAVMI factors for annular plates are introduced and experimentally evaluated for the test plates; these data are adimensional and could be used for applications. The boundary conditions of the plates are both free edges and the plates' material is low carbon steel.

Paper Details

Date Published: 8 September 1994
PDF: 9 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185334
Show Author Affiliations
Marco Amabili, Univ. di Ancona (Italy)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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