Accuracy of an efficient framework for structural analysis of wind turbine blades

Blasques, José Pedro Albergaria Amaral; Bitsche, Robert; Fedorov, V. I.; Lazarov, Boyan Stefanov

doi:10.1002/we.1939

Cited by 38 publications

(25 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analytical cross‐sectional models (AMs) were used to investigate the effect of the boundary conditions on the structural performance of several SCT concepts. To this end, the cross‐sectional properties, ie, axial and bending stiffnesses, location of the elastic center (also called centroid), the structural twist of the full blade cross section, and the cut cross section were determined using the Beam Cross Section Analysis Software (BECAS) . The blade parametrization and input generation was conducted using workflows based on the FUSED‐Wind framework, allowing the fast generation and analysis of full and cut cross‐sectional models.…”

Section: Methodsmentioning

confidence: 99%

Trailing edge subcomponent testing for wind turbine blades–Part A: Comparison of concepts

et al. 2019

View full text Add to dashboard Cite

As a complement to the mandatory structural full‐scale test for wind turbine blades, the method of subcomponent testing has recently been proposed by international standards and guidelines for the experimental investigation of design‐critical full‐scale parts. This work investigated different subcomponent test (SCT) concepts for a trailing edge of an outboard segment from a 34‐m blade. Detailed analytical models to design the SCT concepts with regard to the boundary conditions were derived. Finite element analyses of the SCT's linear response were benchmarked against each other and against the full blade model in terms of displacements, rotations, in‐plane strains, and energy consumption. All SCT concepts were in good agreement with the full‐scale test with respect to the longitudinal strain response but showed deviations in the transverse and shear strain, as well as in the rotational and displacement response.

show abstract

Section: Methodsmentioning

confidence: 99%

Trailing edge subcomponent testing for wind turbine blades–Part A: Comparison of concepts

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Specifically, BeamDyn supports built-in curve, sweep, and sectional offsets of wind turbine blades. Moreover, along with a cross-sectional analysis tool like VABS (Wang and Yu, 2011) and BECAS (Blasques et al, 2016), BeamDyn is capable of simulating the elastic deformations (extension, shear, bending, and torsion) and the coupling effects between all six DOFs for both isotropic and composite slender structures. When these advanced features are needed, BeamDyn replaces the more simplified blade structural model of ElastoDyn, which is only applicable to straight isotropic blades dominated by bending.…”

Section: Fast V8mentioning

confidence: 99%

A validation and code-to-code verification of FAST for a megawatt-scale wind turbine with aeroelastically tailored blades

et al. 2017

View full text Add to dashboard Cite

Abstract. This paper presents validation and code-to-code verification of the latest version of the U.S. Department of Energy, National Renewable Energy Laboratory wind turbine aeroelastic engineering simulation tool, FAST v8. A set of 1141 test cases, for which experimental data from a Siemens 2.3 MW machine have been made available and were in accordance with the International Electrotechnical Commission 61400-13 guidelines, were identified. These conditions were simulated using FAST as well as the Siemens in-house aeroelastic code, BHawC. This paper presents a detailed analysis comparing results from FAST with those from BHawC as well as experimental measurements, using statistics including the means and the standard deviations along with the power spectral densities of select turbine parameters and loads. Results indicate good agreement among the predictions using FAST, BHawC, and experimental measurements. These agreements are discussed in detail in this paper, along with some comments regarding the differences seen in these comparisons relative to the inherent uncertainties in such a model-based analysis.

show abstract

“…The new matrix notations in equations (10) to (14) are briefly introduced here. M is the sectional mass matrix resolved in inertial system; F C and F D are elastic forces obtained from equations (1) and (2) as…”

Section: Geometrically Exact Beam Theorymentioning

confidence: 99%

BeamDyn: A High-Fidelity Wind Turbine Blade Solver in the FAST Modular Framework

Wang

Johnson

Sprague

et al. 2015

33rd Wind Energy Symposium

View full text Add to dashboard Cite

This paper presents a numerical implementation of the geometrically exact beam theory based on the Legendre-spectral-finite-element (LSFE) method. The displacement-based geometrically exact beam theory is presented, and the special treatment of three-dimensional rotation parameters is reviewed. An LSFE is a high-order finite element with nodes located at the Gauss-Legendre-Lobatto points. These elements can be an order of magnitude more computationally efficient than low-order finite elements for a given accuracy level. The new module, BeamDyn, is implemented in the FAST modularization framework for dynamic simulation of highly flexible composite-material wind turbine blades within the FAST aeroelastic engineering model. The framework allows for fully interactive simulations of turbine blades in operating conditions. Numerical examples are provided to validate BeamDyn and examine the LSFE performance as well as the coupling algorithm in the FAST modularization framework. BeamDyn can also be used as a stand-alone high-fidelity beam tool.Wind power is becoming one of the most important renewable energy sources in the USA. In recent years, the size of wind turbines has been increasing immensely to lower the cost of energy, which, because of weight restrictions, requires highly flexible turbine blades. This huge electromechanical system poses a significant challenge for engineering design and analysis. Although possible with modern super computers, direct three-dimensional (3-D) structural analysis is so computationally expensive that engineers are always seeking for more efficient, highly accurate models, especially in the context of coupled aeroelastics.Beam models are widely used to represent and analyse engineering structures that have one dimension that is much larger than the other two. Many engineering components can be idealized as beams: structural members of buildings and bridges in civil engineering, joists and lever arms in heavy-machine industries and helicopter rotor blades. The blades, tower and shaft in a wind turbine system can be analysed as beams. In the weight-critical applications of beam structures, like high-aspect-ratio wings in aerospace and wind energy applications, composite materials are attractive because of their superior strength-to-weight and stiffness-to-weight ratios. However, analysis of composite-material structures is more difficult than their isotropic counterparts due to elastic-coupling effects. Furthermore, wind turbine blades are further complicated by their high flexibility and initial twist/curvatures, which must be treated in the underlying analysis. The geometrically exact beam theory (GEBT), first proposed by Reissner, 1 is a method that has proven powerful for analysis of highly flexible composite beams in the helicopter engineering community. During the past several decades, much effort has been invested in GEBT. Simo 2 and Simo and Vu-Quoc 3 extended Reissner's work to deal with 3-D dynamic problems. Jelenić and Crisfield 4 implemented GEBT using the finite-element me...

show abstract

Accuracy of an efficient framework for structural analysis of wind turbine blades

Cited by 38 publications

References 13 publications

Trailing edge subcomponent testing for wind turbine blades–Part A: Comparison of concepts

Trailing edge subcomponent testing for wind turbine blades–Part A: Comparison of concepts

A validation and code-to-code verification of FAST for a megawatt-scale wind turbine with aeroelastically tailored blades

BeamDyn: A High-Fidelity Wind Turbine Blade Solver in the FAST Modular Framework

Contact Info

Product

Resources

About