Abstract
Experimental results are presented on flow-induced vibrations of a rectangular plate constrained by a stretched string. The plate is clamped at the bottom and deformed to curved configuration by a stretched string at tip ends. Vibration responses of plate are measured, with and without constraint by a stretched string. Changing the angle of the flow, strain of the plate is measured. Maximum strain is obtained when the wind is blown nearly parallel to the plate. Although the strain of the plate constrained by a stretched string is small, the amplitude has broadband spectrum. Chaotic responses are generated by the flow-induced vibrations. Dominant frequency components of the vibration responses correspond to the natural frequencies of the plate. Chaotic responses are examined by the Fourier spectra and the maximum Lyapunov exponents. Contributions of vibration modes to the chaotic responses are inspected by the principal components analysis.
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