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HYDRODYNAMIC STUDY OF THE OLMSTED WICKET GATE USING A 1:25-SCALE MODEL

✍ Scribed by Y. Seda-Sanabria; R.L. Hall; L.E. Suárez

Book ID
102616378
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
399 KB
Volume
12
Category
Article
ISSN
0888-3270

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✦ Synopsis

This paper discusses scale-model tests and analytical procedures for investigating structural vibration problems induced by flow-pressure fluctuations. The structure under study is a 1:25-scale model of a curved wicket gate of the Olmsted Locks and Dam. A simplified technique, based on the added-mass concept assuming an incompressible fluid, was developed to incorporate the hydrodynamic effects of the surrounding fluid in the dynamic analysis of the gate. In order to develop a fundamental understanding of the effects of hydrodynamic interaction, the study concentrated on the hypothesis that the fluid-structure interaction involves only the first structural mode of vibration of the gate. Data from the shaft load and upstream pressure, obtained from the experimental tests of the wicket gate, were analysed in order to validate this assumption. The analysis of the data validated the hypothesis, i.e. that the pressure fluctuations and the induced transient dynamic response observed during the experimental tests are related to the first natural frequency of the wicket gate.

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