scholarly journals Investigation of problems in modeling critical loads on a composite model of a wind turbine blade

2021 ◽  
pp. 101-105
Author(s):  
Oleksiy Domin ◽  
Oleksiy Larin
Keyword(s):  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Critical Loads ◽  
Layer Structure ◽  
Three Dimensional ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Structural Deformation ◽  
Strength Analysis

This article deals with the problems of designing and analysis of the deformed state of the wind turbine blade under critical loads. A three-dimensional shell simulation model is built, taking into account the complex curvilinear geometry and the presence of reinforcing internal parts. The determination of the parameters of the stress-strain state under the influence of wind load was carried out on the basis of the finite element method. A shell ten-node isoparametric finite element was used. The constructed finite element model of the blade allows taking into account the composite structure and reproduced the presence of a different number of composite layers along the thickness of the shell, the diversity of fibers on individual layers, in particular, the curvilinear orthotropy of mechanical properties was modeled. The procedure of multi-layer structure setting is presented, which provides for superimposition of layers of composite one on the other in places of joint, which ensures compliance of model with technological peculiarities. Static analysis of structural deformation calculation is carried out taking into account lifting force and air head force. The strength analysis was performed for each of the layers according to the criterion of maximum deformations. Key words: composite material, wind turbine blade, strength, finite-elemental analysis, orthotropy of characteristics.

On the wind turbine blade loads from an aeroelastic simulation and their transfer to a three-dimensional finite element model of the blade

2019 ◽  
Vol 44 (6) ◽  
pp. 577-595
Author(s):  
Louis-Charles Forcier ◽  
Simon Joncas
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Three Dimensional ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Blade Loads

This article first presents a description of the different load types to which a wind turbine blade is subjected. Analytical equations are derived to express blade loads from operation parameters of the wind turbine (rotor and nacelle velocities and accelerations; pitch, coning, tilt, and azimuth angles; blade mass properties; turbine geometry). This allows a better understanding of the contribution of each of these parameters to the total load on a blade. A difficulty arises for transferring the loads computed by an aeroelastic model (a one-dimensional model of the blade) to a three-dimensional finite element model of the blade. A method is proposed for that purpose. It consists in applying the aerodynamic loads using RBE3 elements and applying gravitational and inertial loads as volume forces. Finally, an example of this method used for the design of a 10 kW wind turbine blade is presented.

Strength Evaluation and Failure Prediction of a Composite Wind Turbine Blade Using Finite Element Analysis

2010 ◽  
Author(s):  
Prenil Poulose ◽  
Zhong Hu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Failure Prediction ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Element Analysis ◽  
Strength Evaluation

Strength evaluation and failure prediction on a modern composite wind turbine blade have been conducted using finite element analysis. A 3-dimensional finite element model has been developed. Stresses and deflections in the blade under extreme storm conditions have been investigated for different materials. The conventional wood design turbine blade has been compared with the advanced E-glass fiber and Carbon epoxy composite blades. Strength has been analyzed and compared for blades with different laminated layer stacking sequences and fiber orientations for a composite material. Safety design and failure prediction have been conducted based on the different failure criteria. The simulation error estimation has been evaluated. Simulation results have shown that finite element analysis is crucial for designing and optimizing composite wind turbine blades.

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.

Development of Glass-Fabric Composite Wind Turbine Blade

2011 ◽  
Vol 308-310 ◽  
pp. 2482-2485 ◽  
Author(s):  
Tai Yan Kam ◽  
B. W. Wang ◽  
H. M. Su
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Development Process ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Glass Fabric ◽  
The Finite Element Method ◽  
Fabric Composite

The development process of a glass-fabric composite wind turbine blade is presented. A finite element model is constructed for the design and stress analysis of the wind blade. The wind blade parts were fabricated using the vacuum-bag molding technique. The assembling process of the wind blade is described in detail. The wind blade was tested to validate the suitability of the design. The finite element method is used to predict the failure wind loads of the wind blade.

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.

Finite Element Analysis of 5MW Fiberglass and Carbon Fiber Wind Turbine Blade

2011 ◽  
Vol 418-420 ◽  
pp. 606-609 ◽  
Author(s):  
Tian De ◽  
Guang Hua Chen ◽  
Jian Mei Zhang
Keyword(s):  
Finite Element ◽  
Carbon Fiber ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Limit Load ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Horizontal Axis Wind Turbine ◽  
Element Analysis

Abstract: Base on finite element method of composite, take 5MW horizontal axis wind turbine blades as example, skin uses a mixture of fiberglass and carbon fiber as ply, spar caps and web adopt carbon fiber ply entirely to build the finite element model of the blade. The total weigh of the blade is 20.2 ton. Use Bladed software calculated the limit load of each cross-section, analyzed the stress distribution of each section and the modal characteristics of the blade, these provide a theoretical reference for the application of carbon fiber using on MW class wind turbine blade.

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