scholarly journals Analysis of a Composite Blade Design for the AOC 15/50 Wind Turbine using a Finite Element Model

2001 ◽  
Author(s):  
LADEAN R. MCKITTRICK ◽  
DOUGLAS S. CAIRNS ◽  
JOHN F. MANDELL ◽  
DAVID C. COMBS ◽  
DONALD A. RABERN ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Element Model ◽  
Blade Design ◽  
Composite Blade

scholarly journals Dynamic Analysis of Tapered Thin-Walled Beams Using Spectral Finite Element Method

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Yiping Shen ◽  
Zhijun Zhu ◽  
Songlai Wang ◽  
Gang Wang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Element Model ◽  
Rotor Blades ◽  
Mode Shapes ◽  
Modal Frequency ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
Spectral Finite Element

Tapered thin-walled structures have been widely used in wind turbine and rotor blade. In this paper, a spectral finite element model is developed to investigate tapered thin-walled beam structures, in which torsion related warping effect is included. First, a set of fully coupled governing equations are derived using Hamilton’s principle to account for axial, bending, and torsion motion. Then, the differential transform method (DTM) is applied to obtain the semianalytical solutions in order to formulate the spectral finite element. Finally, numerical simulations are conducted for tapered thin-walled wind turbine rotor blades and validated by the ANSYS. Modal frequency results agree well with the ANSYS predictions, in which approximate 30,000 shell elements were used. In the SFEM, one single spectral finite element is needed to perform such calculations because the interpolation functions are deduced from the exact semianalytical solutions. Coupled axial-bending-torsion mode shapes are obtained as well. In summary, the proposed spectral finite element model is able to accurately and efficiently to perform the modal analysis for tapered thin-walled rotor blades. These modal frequency and mode shape results are important to carry out design and performance evaluation of the tapered thin-walled structures.

Load application method for shell finite element model of wind turbine blade

2018 ◽  
Vol 42 (5) ◽  
pp. 467-482 ◽  
Author(s):  
Damien Caous ◽  
Nicolas Lavauzelle ◽  
Julien Valette ◽  
Jean-Christophe Wahl
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Detailed Structural Analysis ◽  
Body Load ◽  
Shell Finite Element

It is common to dissociate load computation from structural analysis when carrying out a numerical assessment of a wind turbine blade. Loads are usually computed using a multiphysics and multibody beam finite element model of the whole turbine, whereas detailed structural analysis is managed using shell finite element models. This raises the issue of the application of the loads extracted from the beam finite element model at one node for each section and transposed into the shell finite element model. After presenting the methods found in the literature, a new method is proposed. This takes into account the physical consistency of loads: aerodynamic loads are applied as pressure on the blade surface, and inertial loads are applied as body loads. Corrections imposed by pressure and body load computation in order to match loads from the beam finite element model are proposed and a comparison with two other methods is discussed.

A Finite Element Model of a Wind Turbine Tower

2010 ◽  
Author(s):  
V. V. Pasheva ◽  
E. S. Chankov ◽  
G. I. Venkov ◽  
George Venkov ◽  
Vesela Pasheva ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Element Model ◽  
Wind Turbine Tower

Modeling of Blades as Equivalent Beams for Aeroelastic Analysis

2003 ◽  
Author(s):  
David J. Malcolm ◽  
Daniel L. Laird
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Three Dimensional ◽  
Element Model ◽  
Detailed Model ◽  
Stiffness Matrices ◽  
Aeroelastic Analysis ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

A procedure has been developed and tested to derive a set of one-dimensional beam properties that will duplicate the behavior of a full three-dimensional finite element model of a wind turbine blade. This allows the full features of a detailed model to be transferred to an aeroelastic code for dynamic simulation of the complete wind turbine. The process uses the NuMAD interface to generate an ANSYS® finite element model to which a set of six unit loads are applied at the tip. The displacement results are used in a series of MATLAB routines to extract the stiffness matrices of the desired beam elements. Tests have been carried out on a number of blades and the stiffness matrices incorporated into ADAMS® models of the blades and complete wind turbines.

scholarly journals Updating Finite Element Model of a Wind Turbine Blade Section Using Experimental Modal Analysis Results

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Marcin Luczak ◽  
Simone Manzato ◽  
Bart Peeters ◽  
Kim Branner ◽  
Peter Berring ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Numerical Study ◽  
Element Model ◽  
Full Scale ◽  
Wind Turbine Blade ◽  
Model Parameters ◽  
Blade Section

This paper presents selected results and aspects of the multidisciplinary and interdisciplinary research oriented for the experimental and numerical study of the structural dynamics of a bend-twist coupled full scale section of a wind turbine blade structure. The main goal of the conducted research is to validate finite element model of the modified wind turbine blade section mounted in the flexible support structure accordingly to the experimental results. Bend-twist coupling was implemented by adding angled unidirectional layers on the suction and pressure side of the blade. Dynamic test and simulations were performed on a section of a full scale wind turbine blade provided by Vestas Wind Systems A/S. The numerical results are compared to the experimental measurements and the discrepancies are assessed by natural frequency difference and modal assurance criterion. Based on sensitivity analysis, set of model parameters was selected for the model updating process. Design of experiment and response surface method was implemented to find values of model parameters yielding results closest to the experimental. The updated finite element model is producing results more consistent with the measurement outcomes.

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