کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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785239 | 1465375 | 2010 | 13 صفحه PDF | دانلود رایگان |
The random oscillations of small-sag, small-diameter cables induced by a turbulent wind are investigated through a reduced-order model containing both mechanical and aerodynamic non-linearities. The model is formulated on the basis of a state-of-the-art cable non-linear theory for the description of the mechanical behaviour, and of the quasi-steady assumption for the description of the aerodynamic forces. The discretization is carried out by a standard Galerkin approach and the resulting model is presented adopting a compact vectorial formalism enabling the formulation of expressions independent of the order of discretization as well as of the order of the non-linearities retained in the expression of aerodynamic forces. A Monte Carlo parametric analysis on a case-study, representative of a suspended cable typical of overhead power-line applications, introduces a discussion on the convergence of the modal expansions and highlights the respective importance of the different classes of non-linear terms included in the model.
Journal: International Journal of Non-Linear Mechanics - Volume 45, Issue 3, April 2010, Pages 219–231