Journal
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
Volume 198, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jweia.2020.104100
Keywords
Vortex-induced vibrations (VIVs); VIV spectral model; VIV regimes; Closed-form solutions
Categories
Funding
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [741273]
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The present paper discusses technical aspects of the vortex-induced vibrations (VIVs) of structures excited by the wind in the framework of the spectral model, which is applied by many codes and guidelines for civil engineering verifications. Quantitative thresholds related to Scruton number domains, where the structural response can be considered in forced vibration or lock-in regime, are proposed. In this way, the type of VIV response and its evaluation can be assessed with simple calculations that use the parameters already present in codes and guidelines. An analytical solution of the original model allows straightforward evaluations inclusive of operative criteria to properly consider structural and flow conditions concerning the coefficients governing the VIV response in the spectral description, leaving out some assumptions that are commonly adopted. Extensive numerical applications, limited here to circular cylinders and including a real full-scale chimney, allow to identify the most significant parameters of the model and the criticalities connected with their choice.
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