Fracture analysis and improvement of the main shaft of wind turbine based on finite element method

Wang, Ruiming; Han, Tian; Wang, Wenrui; Xue, Yang; Fu, Deyi

doi:10.1177/1687814018769003

Cited by 9 publications

(6 citation statements)

References 13 publications

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“…The main shaft of the HAWT model, made of 34CrNiMo6 steel, complies with wind turbine certification standards [14]. Furthermore, it was analyzed by finite element method and confirmed by Mohr II theory calculations to get the deflection value due to radial load.…”

Section: Methodsmentioning

confidence: 99%

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Kriswanto

Nuryanto

Prasdiansyah

et al. 2022

ARFMTS

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One way to reduce maintenance costs while improving wind turbine efficiency is to replace mechanical bearings with permanent magnetic bearings. The permanent magnetic bearing is a free contact bearing in which the rotor is elevated from the stator by the magnet's repelling force. The purpose of this study is to analyze the variation of permanent magnet width and the gap distance between the rotor-stator magnets that can produce the magnetic axial force opposing the thrust force of 1MW horizontal axis wind turbines (HAWT). The method used in this study is a magnetic force simulation using finite element method by varying the magnet thickness, width of the gap, and displacement between the rotor-stator of the PMB model. The PMB model consists of rotor and stator magnets arranged in 3 layers with Nd2Fe14B type material with a magnetic flux density of 1.45 T. Variations in thickness of the rotor and stator magnets are 0.1; 0.15, respectively; 0.2 (m), while variations in the width of the magnetic gap are 4, 5, 6 (mm). The results of the study found that the displacement that produces an axial magnetic force that can support a thrust force of 199.5kN is the lowest in the PMB model with a magnetic thickness of 0.15m with a magnetic gap of 4mm, while the highest is at a magnetic thickness of 0.1m with a magnet gap of 6mm. The greater the thickness of the PMB axial magnet design, the greater the displacement that provides zero axial magnetic forces. Further, the maximum of the magnetic axial force is rise on with increasing magnet thickness.

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Section: Methodsmentioning

confidence: 99%

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Kriswanto

Nuryanto

Prasdiansyah

et al. 2022

ARFMTS

View full text Add to dashboard Cite

show abstract

“…e definition of the linear elastic material constitutive model was adopted, and the stress values were analyzed under the rated load condition and the impact condition, respectively. In order to obtain a reasonable stress distribution of the main shaft, the wind loads were obtained by aerodynamics analysis using a FAST procedure [12]. According to the finite element method simulation, we can know that the positions of the maximum internal stress of main shaft are always located at the center of the variable section both under steady-state conditions and impact conditions.…”

Section: Methodsmentioning

confidence: 99%

Effect of Rare Earth Ce on the Microstructure and Mechanical Properties of 34CrNiMo6 Steel for Wind Turbine Main Shaft

Wang

2019

Advances in Materials Science and Engineering

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The effect of rare earth Ce on mechanical properties is studied by investigating the precipitates evolution during heat treatment of 34CrNiMo6 steel. Five different rare earth Ce contents are carried out with the same holding time 3 hours. Then, the mechanical properties of 34CrNiMo6 steel are obtained under steady state conditions and impact conditions, respectively. The strength decreases while the elongation after breakage increases with the rare earth Ce content increasing. The impact absorbing energy at 20°C and −40°C increases with the rare earth Ce content increasing. Based on the experimental results, the recommended rare earth Ce content is 0.05 wt.%. The differences in mechanical properties among the different rare earth Ce contents may be the nucleation rate and growth of precipitates under different conditions. The spherification degree of cementite is more complete with rare earth Ce content, resulting in the decrease of mechanical properties and improvement of ductility.

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“…A higher-order multibody shaft model can be seen as of comparable fidelity and computational load as a BEM model of the turbine aerodynamics. The fidelity can be increased further with a distributed parameter model or a FEM model of the turbine shaft as presented in [103].…”

Section: Structure and Drivetrain Mechanicsmentioning

confidence: 99%

“…Nevertheless, it allows combining the merits of different modelling techniques eventually leading to a more realistic virtual replica. Computational Fluid Dynamics [69] FEM structural blade model [70][71][72] Large Eddy Simulation (LES) [78][79][80] FEM model of turbine shaft [103] FEM model of the tower and support structure [89,90] Electromagnetic FEM [109][110][111] Dynamic switching models [127][128][129] Conduction and switching loss models [130,131] Transient wide-bandgap component models [132] Full pitch drivetrain models [150][151][152][153] Full yaw drivetrain models [154,155] Blade-Element Momentum [57] Extensions -Tip losses [60,61] -Dynamic stall [62,63] -Blade flexibility [64,65] -Tower and nacelle flow disturbance [66] -Gaussian [82] or Curl [83] wake model Surrogate models [73][74][75] Multi-body drivetrain model [101,102] Multi-body tower and foundation model [84][85][86]<...>…”

Section: Virtual Replicamentioning

confidence: 99%

Digital Twins for Wind Energy Conversion Systems: A Literature Review of Potential Modelling Techniques Focused on Model Fidelity and Computational Load

et al. 2021

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The Industry 4.0 concept of a Digital Twin will bring many advantages for wind energy conversion systems, e.g., in condition monitoring, predictive maintenance and the optimisation of control or design parameters. A virtual replica is at the heart of a digital twin. To construct a virtual replica, appropriate modelling techniques must be selected for the turbine components. These models must be chosen with the intended use case of the digital twin in mind, finding a proper balance between the model fidelity and computational load. This review article presents an overview of the recent literature on modelling techniques for turbine aerodynamics, structure and drivetrain mechanics, the permanent magnet synchronous generator, the power electronic converter and the pitch and yaw systems. For each component, a balanced overview is given of models with varying model fidelity and computational load, ranging from simplified lumped parameter models to advanced numerical Finite Element Method (FEM)-based models. The results of the literature review are presented graphically to aid the reader in the model selection process. Based on this review, a high-level structure of a digital twin is proposed together with a virtual replica with a minimum computational load. The concept of a multi-level hierarchical virtual replica is presented.

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Fracture analysis and improvement of the main shaft of wind turbine based on finite element method

Cited by 9 publications

References 13 publications

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Analysis of an Axial Permanent Magnetic Bearing for 1MW Horizontal Axis Wind

Effect of Rare Earth Ce on the Microstructure and Mechanical Properties of 34CrNiMo6 Steel for Wind Turbine Main Shaft

Digital Twins for Wind Energy Conversion Systems: A Literature Review of Potential Modelling Techniques Focused on Model Fidelity and Computational Load

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