Postbuckling Analysis of a Wind Turbine Blade Substructure

2005 ◽  
Vol 127 (4) ◽  
pp. 544-552 ◽  
Author(s):  
Thomas M. Hermann ◽  
Dharmaraj Mamarthupatti ◽  
James E. Locke
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Composite Laminates ◽  
Shell Element ◽  
Wind Turbine Blade ◽  
Shear Locking ◽  
Static Test ◽  
Finite Element Software ◽  
Buckling Behavior ◽  
The Web

Postbuckling analysis of composite laminates representative of wind turbine blade substructures, utilizing the commercial finite element software ANSYS, is presented in this paper. The procedure was validated against an existing postbuckling analysis. Three shell element formulations, SHELL91, SHELL99, and SHELL181, were examined. It was found that the SHELL181 element with reduced integration should be used to avoid shear locking. The validated procedure was used to examine the variation of the buckling behavior, including postbuckling, with lamination schedule of a laminate representative of a wind turbine blade shear web. This analysis was correlated with data from a static test. A 100% postbuckling reserve in a composite structure representative of a shear web was quantified through test and analysis. The buckling behavior of the shear web was improved by modifying the lamination schedule to increase the web bending stiffness. Modifications that improved the buckling load of the structure did not always equate to improvements in the postbuckling reserve.

Failure Mode Estimation with Inter-Fiber Failure Analysis of Composite Wind Turbine Blade

2011 ◽  
Vol 109 ◽  
pp. 84-88
Author(s):  
Soo Hyun Kim ◽  
Hyung Joon Bang
Keyword(s):  
Composite Materials ◽  
Wind Turbine ◽  
Failure Mode ◽  
Turbine Blade ◽  
Fe Analysis ◽  
Wind Turbine Blade ◽  
Analysis Model ◽  
Fiber Failure ◽  
Static Test ◽  
Mode Estimation

This paper provides an overview of the failure mode estimation result with 3D finite element (FE) analysis model of wind turbine blade. In order to predict the realistic behavior in the whole blade region, fiber failure (FF) and inter-fiber failure (IFF) analysis were applied to account delamination or matrix failure on composite materials. The Puck’s fracture criteria were used for the IFF evaluation. For the comparison of FE analysis result with the measured data of static test, a 3.5m down-scaled wind turbine blade was designed and fabricated using glass fiber epoxy composite materials. A nonlinear static structural analysis was performed and then the failure mode and the location were estimated with the FF and IFF analysis.

Experimental updating of a segmented wind turbine blade numerical model using the substructure method

2020 ◽  
pp. 030932472093278
Author(s):  
Majdi Yangui ◽  
Slim Bouaziz ◽  
Mohamed Taktak ◽  
Mohamed Haddar
Keyword(s):  
Numerical Model ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Natural Frequencies ◽  
Model Updating ◽  
Mechanical Performance ◽  
Shell Element ◽  
Wind Turbine Blade ◽  
Model Parameters ◽  
Fused Deposition

During the development of the wind turbine system, blades are considered as the most critical components. The blades’ dynamic characteristics must be investigated during the design process to improve their mechanical performance. This work presents an experimental updating of a segmented wind turbine blade numerical model. For this purpose, the blade segments were manufactured using the fused deposition 3D printing technology and assembled using a threaded spar and nut. For different values of the segments assembly load, the natural frequencies and damping ratios were identified using the eigensystem realization algorithm method. The dynamic behavior of the segmented blade was examined numerically using the three-node shell element, taking into consideration the additional stiffness generated by the applied assembly load. In this study, numerical and experimental modal analysis were used to identify the first five eigenfrequencies of the blade. To update the numerical model parameters, through the identified experimental results, an iterative method was developed based on the Craig–Bampton substructure approach. Results show that the blade natural frequencies are proportional to the segments assembly load. The application of the proposed method on the segmented blade numerical model updating shows that the present method is computationally efficient.

Parameterized Modeling and Analysis of Wind Turbine Blade Using VB and ANSYS

2013 ◽  
Vol 774-776 ◽  
pp. 248-251
Author(s):  
Jian Hua Zhang ◽  
Dian Wei Gao ◽  
Ke Sun ◽  
Xin Sheng Liu
Keyword(s):  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Research Work ◽  
Element Model ◽  
Wind Turbine Blade ◽  
Secondary Development ◽  
Modeling And Analysis ◽  
Finite Element Software ◽  
Parameterized Modeling

It is very difficult to establish a model of wind turbine blade in finite element software directly because of complexity of the shape. To solve this problem, parameterized modeling and analysis program of wind turbine blade is developed applying of ANSYS secondary development technique based on VB6.0. Processes of establishing a finite element model, applying loads and extracting Post-processing data of wind turbine blade are described. A numeral example demonstrates the program is feasible and correct. The research work can help to speed up application of ANSYS secondary technique in design and analysis of wind turbine blade and provide references for parameterized modeling and analysis of similar engineering in the future.

scholarly journals Application of Shell Element in Temperature Field Predication of Wind Turbine Blade

2015 ◽  
Vol 7 (1) ◽  
pp. 1323-1328
Author(s):  
Tianyu Ning ◽  
Qixing Liu ◽  
Jiling Bu ◽  
Yong Zheng ◽  
Changda Li ◽  
...  
Keyword(s):  
Temperature Field ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Shell Element ◽  
Wind Turbine Blade

scholarly journals Finite Element Analysis for the Web Offset of Wind Turbine Blade

2017 ◽  
Vol 63 ◽  
pp. 012011
Author(s):  
Bo Zhou ◽  
Xin Wang ◽  
Changwei Zheng ◽  
Jinxiang Cao ◽  
Pingguo Zou
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Element Analysis ◽  
The Web
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