Aereodynamics of dry helically-filleted bridge cables

Burlina, Celeste (2014) Aereodynamics of dry helically-filleted bridge cables. [Laurea magistrale], Università di Bologna, Corso di Studio in Civil engineering [LM-DM270], Documento ad accesso riservato.
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Dry limited amplitude vibrations flow-transition induced vibrations were experienced on a helically-filleted tube, in a previous study performed by Kleissl and Georgakis (2012). These vibrations have never been reported in previous studies. A deep study on the same inclined-yawed cable configuration has been performed, in order to investigate and further understand the nature of these vibrations. The investigation has been carried out through passive-dynamic wind tunnel tests in the Climatic Wind Tunnel at FORCE Technology, Kgs. Lyngby, Denmark. The results are carried out in terms of aerodynamic damping and peak to peak amplitude at different flow velocities and different boundary conditions. The latter are done by testing the model with and without the spray system installed in the wind tunnel cross section, in order to understand and evaluate the influence of the spray system on the start of the vibrations mechanism and on the flow turbulence. The gained experiences are finally presented for the use in future testing activities with the purpose of improving the performance of passive-dynamic tests.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Burlina, Celeste
Relatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
helically filleted cables, dry state, dry vibration, wind engineering, wind tunnel
Data di discussione della Tesi
17 Marzo 2014

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