Research on mechanism of the large-amplitude and narrow-band vibration of a flexible flat plate in the rectangular channel

• Published in: Nuclear engineering and design Vol. 250; pp. 560 - 566
• Main Authors: Liu, Lifang, Lu, Daogang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2012; Elsevier
• Subjects: Applied sciences; Channels; Controled nuclear fusion plants; Design engineering; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fission nuclear power plants; Flat plates; Fluid dynamics; Frequency bands; Fuels; Installations for energy generation and conversion: thermal and electrical energy; Nuclear engineering; Nuclear fuels; Plates; Vibration; Narrow channel; Vibration; Nuclear reactor
• ISSN: 0029-5493; 1872-759X
• DOI: 10.1016/j.nucengdes.2012.05.031

► The large amplitude and narrow-band vibration experiment was performed. ► The added mass theory was used to analyze the test plates’ natural vibration characteristics in static water. ► The occurring condition of the large amplitude and narrow band vibration was investigated. ► The large amplitude and narrow-band vibration mechanism was investigated. Further experiments and theoretical analysis were performed to investigate mechanism of the large-amplitude and narrow-band vibration behavior of a flexible flat plate in a rectangular channel. Test plates with different thicknesses were adopted in the FIV experiments. The natural vibration characteristics of the flexible flat plates in air were tested, and the added mass theory of column was used to analyze the flexible flat plates’ natural vibration characteristics in static water. It was found that the natural vibration frequency of a certain test plate in static water is approximately within the main vibration frequency band of the plate when it was induced to vibrate with the large-amplitude and narrow-band in the rectangular channel. It can be concluded that the harmonic between the flowing fluid and the vibrating plate is one of the key reasons to induce the large-amplitude and narrow-band vibration phenomenon. The occurring condition of the phenomenon and some important narrow-band vibration characteristics of a foursquare fix-supported flexible flat plate were investigated.