A bluff structure placed in a flowing fluid, may be subjected to vortex-induced vibrations
(VIV). For a flat plate with only rotational degree of freedom, the VIV is
rotational oscillation. Based on the experimental investigation, vortex-induced oscillation
of the plate is studied. The Strouhal number is measured from the stationary
plate in a low speed steady wind tunnel. A set of vibration tests are conducted
to investigate the relationships between shedding frequency and vibration frequency.
“lock-in” phenomena is observed with and without large amplitude. An empiricalanalytical
model via introducing a nonlinear van der Pol oscillator is developed.
This thesis investigates the “lock-in” phenomena of a flat plate in pitch oscillation.
Results from wind tunnel experiments on a flat plate indicate the “lock-in” is
frequency “lock-in”, resonance which appears large response amplitude occurs in the
“lock-in” regime and may be influenced by “lock-in” phenomena.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2010-12-8984 |
| Date | 2010 December 1900 |
| Creators | Yang, Yi |
| Contributors | Barroso, Luciana R., Strganac, Thomas W. |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | thesis, text |
| Format | application/pdf |
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