Autors: Kralov, I. M., Genov, J. A., Angelov, I. A.
Title: Dynamical stresses in the high class wind turbine blades caused in nonhomogeneous nonstationary wind field. Part 1 - Dynamical model
Keywords: wind turbines, BEM theory

Abstract: The wind turbines of a high class are with considerable sizes. For this reason, the consideration of the fluid field as a homogeneous when performing the aerodynamic analysis is not quite correct. In addition, due to the gusts and horizontal turbulence, the wind field is also nonstationary. All this causes dynamic, time-varying loads and fatigue. The determination of these loads is a major aim of this publication. The turbine blades are considered as Euler-Bernoulli beams under the impact of the aerodynamic thrust and torque forces as well as from this of the centrifugal force. The finite element method is applied to solve the partial differential equations. Two-node elements with four degrees of freedom for each node and a cubic, polynomial approximation of modal shapes were used. The deformations are relatively small in the separated finite elements and the superposition principle is applied.

References

    Issue

    TechSys 2020, IOP Conf. Ser., issue 878, 2020, Bulgaria, doi:10.1088/1757-899X/878/1/012036

    Copyright IOP Publishing

    Вид: публикация в международен форум, публикация в реферирано издание, индексирана в Scopus