A Nonlinear and Non-Ideal Wind Generator Supporting Structure

Reyolando Manoel Lopes Rabelo da Fonseca Brasil; L.C.S. Feitosa; José Manoel Balthazar

doi:10.4028/www.scientific.net/AMM.5-6.433

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 5-6A Nonlinear and Non-Ideal Wind Generator...

A Nonlinear and Non-Ideal Wind Generator Supporting Structure

Abstract:

We present a simple mathematical model of a wind turbine supporting tower. Here, the wind excitation is considered to be a non-ideal power source. In such a consideration, there is interaction between the energy supply and the motion of the supporting structure. If power is not enough, the rotation of the generator may get stuck at a resonance frequency of the structure. This is a manifestation of the so-called Sommerfeld Effect. In this model, at first, only two degrees of freedom are considered, the horizontal motion of the upper tip of the tower, in the transverse direction to the wind, and the generator rotation. Next, we add another degree of freedom, the motion of a free rolling mass inside a chamber. Its impact with the walls of the chamber provides control of both the amplitude of the tower vibration and the width of the band of frequencies in which the Sommerfeld effect occur. Some numerical simulations are performed using the equations of motion of the models obtained via a Lagrangian approach.

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Periodical:

Applied Mechanics and Materials (Volumes 5-6)

Pages:

433-442

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.5-6.433

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Online since:

October 2006

Authors:

Reyolando Manoel Lopes Rabelo da Fonseca Brasil, L.C.S. Feitosa, José Manoel Balthazar

Keywords:

Impact Damper, Non-Ideal Power Sources, Nonlinear Dynamics, Wind Turbine (WT)

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