Dynamic Analysis for Wind Turbine Composite Blade

2013 ◽  
Vol 364 ◽  
pp. 102-106 ◽  
Author(s):  
Li Qun Zhou ◽  
Shuai Heng Xing ◽  
Yu Ping Li
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Inertia Force ◽  
Rotational Inertia ◽  
Fiber Layer ◽  
Composite Blade ◽  
Nature Frequency ◽  
The Relationship ◽  
Blade Model

Wind turbine blade model is analyzed based on finite element method. Research and comparison of blade natural frequencies is made in different rotational working conditions taking into account external factors such as the rotational inertia force. Also the relationship between the composite ply angle and natural frequency is analyzed. The result shows that the nature frequency of wind turbine blade is influence greatly by the stress stiffening effect for the blade rotation. And the nature frequency of wind turbine blade can be designed by adjusting the single fiber layer ply angle of blade.

Damage mode identification of composite wind turbine blade under accelerated fatigue loads using acoustic emission and machine learning

2019 ◽  
Vol 19 (4) ◽  
pp. 1092-1103 ◽  
Author(s):  
Pengfei Liu ◽  
Dong Xu ◽  
Jingguo Li ◽  
Zhiping Chen ◽  
Shuaibang Wang ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Mode Identification ◽  
Emission Signal ◽  
Composite Blade ◽  
Acoustic Emission Sensors ◽  
Safety Precaution ◽  
Fatigue Loads

This article studies experimentally the damage behaviors of a 59.5-m-long composite wind turbine blade under accelerated fatigue loads using acoustic emission technique. First, the spectral analysis using the fast Fourier transform is used to study the components of acoustic emission signals. Then, three important objectives including the attenuation behaviors of acoustic emission waves, the arrangement of sensors as well as the detection and positioning of defect sources in the composite blade by developing the time-difference method among different acoustic emission sensors are successfully reached. Furthermore, the clustering analysis using the bisecting K-means method is performed to identify different damage modes for acoustic emission signal sources. This work provides a theoretical and technique support for safety precaution and maintaining of in-service blades.

scholarly journals Influence of the wind turbine blade model on echo's Doppler characteristics

2019 ◽  
Vol 2019 (16) ◽  
pp. 1419-1422 ◽  
Author(s):  
Bo Tang ◽  
Bin Hao ◽  
Li Huang ◽  
Jiawei Yang
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Blade Model

scholarly journals The Study of Wind Turbine Blade Fatigue Test

2021 ◽  
Vol 293 ◽  
pp. 02024
Author(s):  
Jiaqi Zheng ◽  
Qiming Yu ◽  
Botao Zhu ◽  
Changqing Wu ◽  
Yiling Huang ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Fatigue Test ◽  
Turbine Blade ◽  
Excitation Amplitude ◽  
Wind Turbine Blade ◽  
Excitation Mode ◽  
Practical Operation ◽  
Important Means ◽  
Feasible Solutions ◽  
The Relationship

The fatigue test of wind turbine blade is an important means to verify the fatigue life of wind turbine blade. This paper analyses the problems existing in the fatigue test of wind turbine blade, focuses on the excitation mode, the relationship between excitation amplitude and vibration frequency and the vibration principle, and puts forward feasible solutions in practical operation.

RANCANGAN DAN ANALISIS STRUKTUR SUDU TURBIN ANGIN LPN 10000 E

2010 ◽  
Vol 3 (2) ◽  
Author(s):  
Sulistyo Atmadi ◽  
Firman Hartono
Keyword(s):  
Structural Analysis ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Safety Factor ◽  
Bending Moment ◽  
High Strength ◽  
Wind Turbine Blade ◽  
Unidirectional Reinforcement ◽  
Composite Blade ◽  
Operational Load

Structure of the LPN 10000 E wind turbine blade has been manufactured and its structural analysis to find out the strenght of this structure during its operation has also been conducted. The method of aero bending moment and centrifugal bending moment and load has been used while neglegting frcitional and torsional load. The analysis is obtained for composite blade strengthened by high strength carbon unidirectional reinforcement composite. With safety factor of 1.3 minimum, it was concluded that the blade is strong enough to use at its designed operational load.

Research on Forming Technology of Thermoplastic Composite Blade for Wind Turbine

2013 ◽  
Vol 328 ◽  
pp. 139-143
Author(s):  
Hai Tang Cen ◽  
Xiao Liang Wang ◽  
Zhi Yong Hu
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
High Performance ◽  
Wind Turbine Blade ◽  
Thermoplastic Composite ◽  
Deformation Model ◽  
Thermoplastic Resin ◽  
Forming Process ◽  
Composite Blade ◽  
Forming Technology

Thermoplastic composite has become preferred material for wind turbine blade with high performance, low cost and greenization. The fused mass of the thermoplastic resin has high viscosity and the forming of the thermoplastic composite materials is laborious, quality is not readily guaranteed, thus, the widespread use of thermoplastic composite blades for wind turbine is restricted. Based on the analysis of all kinds of the characteristics of thermoplastic forming technology, the paper has points out that the diaphragm forming is especially suitable for making a hyperboloid, variable thickness, large size wind turbine thermoplastic composite blade structure. The key to improving the forming quality and the efficiency of the thermoplastic blade forming is to establish finite element deformation model of a diaphragm forming process, to effectively control the process parameters such as temperature, pressure, forming rate. Conducting research on thermoplastic blade diaphragm forming technology lay the foundation for the industrialization of thermoplastic wind turbine blade.

Modal Aanalysis of the Composite Material Blade

2010 ◽  
Vol 34-35 ◽  
pp. 1374-1378 ◽  
Author(s):  
Jian Hua Li ◽  
Cai Ming Fu ◽  
Wen Gui Mao
Keyword(s):  
Composite Material ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Dynamic Stress ◽  
Great Influence ◽  
Material Model ◽  
Wind Turbine Blade ◽  
Modulation Method ◽  
Mode Shapes ◽  
Blade Model

Dynamic stress of wind turbine blade has great influence on its reliability and fatigue life. In order to decrease the magnitude of dynamic stress, frequency modulation method is often used to avoid resonance. This paper created composite material model for a wind turbine blade. Blade model was imported to abaqus environment for modal analysis. In view of the characteristics of fiber reinforces plastic, a mesh was built to carry out the model analysis, and the first 6 orders of the vibration frequencies and mode shapes were obtained, by imposing certain bound on the root of blade. Meanwhile, The analysis results of the composite material blade considering stiffening effect were obtained. This method can shorten modeling time and improve working efficiency, and also it is the base for blade structure calculation and check and new product developing.

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