The study reported in this paper concerns the transverse vibrations of elastically mounted rigid cylinders above a plane bed and has applications to submarine pipelines. The wave-induced oscillations of elastically-mounted horizontal circular cylinders are investigated. The cylinders are well submerged and placed at various distances from a plane bed. The Keulegan-Carpenter number varies to a maximum of 16 and the Reynolds numbers are in the subcritical regime. The cylinders are highly damped. The experimental data reported here include information concerning the transverse oscillations of the cylinders in the presence of regular waves in a laboratory channel. A numerical analysis representing the oscillations of the cylinder as a one-degree-of-freedom system is carried out using an empirical equation for the forcing function relevant to the range of Keulegan-Carpenter numbers of the experiments. The experimental results are compared with the numerical results. The numerical results are also obtained for the experimental conditions of other investigators who carried out experiments with very low damping of the cylinder. The results show the effect of damping on the oscillatory behavior of the cylinder when positioned near a plane bed.
Oscillations of elastically-mounted cylinders over plane beds in waves
Anregung von Schwingungen von in Wasser eingetauchten elastisch gelagerten Kreiszylindern durch Oberflächenwellen
Journal of Fluids and Structures ; 11 , 5 ; 447-463
1997
17 Seiten, 13 Bilder, 4 Tabellen, 24 Quellen
Aufsatz (Zeitschrift)
Englisch
elastische Schwingung , Transversalwelle , Wasserkanal , Reynolds-Zahl , Kreiszylinderumströmung , dimensionslose Kennzahl , gedämpfte Schwingung , Laboratoriumsversuch , numerisches Verfahren , Bewegungsgleichung , Amplitudengang , Rohrfernleitung , Meeresboden , Schwingungssystem , Schwingungsamplitude , Schwingungsdämpfung , experimentelles Ergebnis , Schwingungsanregung , Unterwassertechnik
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