The research deals with the non-linear dynamic response of cables under steady and turbulent wind. A numerical procedure is described, which fully accounts for geometric and aerodynamic non linearities. In the procedure, the cable is modeled using 3 nodes isoparametric finite elements. The aerodynamic forces are introduced according to the quasi-steady approach, retaining the complete non-linear form of drag and lift components. The methodology is applied to the oscillations of an iced cable in 1 : 2 internal resonance, subjected to a stationary wind flow as well as to a multi-correlated turbulent wind field. For the stationary case the numerical results are compared with those obtained by other researchers using an analytical model. The analysis of time-histories allows for some interesting considerations on the occurrence of self-excited oscillations and on effect of the turbulence structure on the cable response.

Numerical analysis of the dynamic behavior of cables under turbulent wind

MARTINELLI, LUCA;PEROTTI, FEDERICO
2004-01-01

Abstract

The research deals with the non-linear dynamic response of cables under steady and turbulent wind. A numerical procedure is described, which fully accounts for geometric and aerodynamic non linearities. In the procedure, the cable is modeled using 3 nodes isoparametric finite elements. The aerodynamic forces are introduced according to the quasi-steady approach, retaining the complete non-linear form of drag and lift components. The methodology is applied to the oscillations of an iced cable in 1 : 2 internal resonance, subjected to a stationary wind flow as well as to a multi-correlated turbulent wind field. For the stationary case the numerical results are compared with those obtained by other researchers using an analytical model. The analysis of time-histories allows for some interesting considerations on the occurrence of self-excited oscillations and on effect of the turbulence structure on the cable response.
2004
Proc. of the 2nd International Conference on Structural Engineering, Mechanics and Computation (SEMC2004), Cape Town, South Africa, July 5-7, 2004
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/273335
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