A study of action point correction factor for L-type flanges of wind turbine towers

Wind Energy ◽  
2018 ◽  
Vol 21 (9) ◽  
pp. 801-806 ◽  
Author(s):  
Ikuo Tobinaga ◽  
Takeshi Ishihara
Keyword(s):  
Wind Turbine ◽  
Correction Factor ◽  
Action Point ◽  
Wind Turbine Towers

Wind load response of offshore wind turbine towers with fixed monopile platform

2016 ◽  
Vol 158 ◽  
pp. 122-138 ◽  
Author(s):  
M. Feyzollahzadeh ◽  
M.J. Mahmoodi ◽  
S.M. Yadavar-Nikravesh ◽  
J. Jamali
Keyword(s):  
Wind Turbine ◽  
Wind Load ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Load Response ◽  
Wind Turbine Towers

Methodology for seismic risk assessment for tubular steel wind turbine towers: application to Canadian seismic environment

2011 ◽  
Vol 38 (3) ◽  
pp. 293-304 ◽  
Author(s):  
Elena Nuta ◽  
Constantin Christopoulos ◽  
Jeffrey A. Packer
Keyword(s):  
Seismic Hazard ◽  
Wind Turbine ◽  
Seismic Loading ◽  
Element Analysis ◽  
Design Spectrum ◽  
Wind Turbine Tower ◽  
Damage States ◽  
Wind Turbine Towers ◽  
Hazard Level ◽  
Hazard Levels

The seismic response of tubular steel wind turbine towers is of significant concern as they are increasingly being installed in seismic areas and design codes do not clearly address this aspect of design. The seismic hazard is hence assessed for the Canadian seismic environment using implicit finite element analysis and incremental dynamic analysis of a 1.65 MW wind turbine tower. Its behaviour under seismic excitation is evaluated, damage states are defined, and a framework is developed for determining the probability of damage of the tower at varying seismic hazard levels. Results of the implementation of this framework in two Canadian locations are presented herein, where the risk was found to be low for the seismic hazard level prescribed for buildings. However, the design of wind turbine towers is subject to change, and the design spectrum is highly uncertain. Thus, a methodology is outlined to thoroughly investigate the probability of reaching predetermined damage states under any seismic loading conditions for future considerations.

Remote monitoring and nondestructive evaluation of wind turbine towers

2014 ◽  
Author(s):  
Chih-Hung Chiang ◽  
Chih-Peng Yu ◽  
Keng-Tsang Hsu ◽  
Chia-Chi Cheng ◽  
Ying-Tzu Ke ◽  
...  
Keyword(s):  
Nondestructive Evaluation ◽  
Wind Turbine ◽  
Remote Monitoring ◽  
Wind Turbine Towers

scholarly journals Earth-termination system for onshore wind Turbines.

2020 ◽  
Vol 11 (7-2020) ◽  
pp. 66-72
Author(s):  
Liubov A. Belova ◽  
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Lightning Strike ◽  
Lightning Protection ◽  
Protection Measures ◽  
Lightning Strikes ◽  
Grounding System ◽  
Initial Stage ◽  
Wind Turbine Towers ◽  
Surge Protection

The earth-termination system for towers of ground-based wind turbines in addition to protective and functional grounding provides lightning protection grounding, which is especially important since the wind turbine is susceptible to lightning strikes. If insufficient protective measures are taken, the risk of damage to a wind turbine due to a lightning strike increases. Therefore, a well-thought-out built-in grounding system for wind turbine towers is needed, which would function as necessary and guarantee long-term mechanical strength and corrosion resistance. The configuration of grounding systems for wind turbines is discussed in IEC 61400-24, which deals with the topic of lightning protection for wind turbines, including detailed information on the choice of lightning protection measures and surge protection. It is advisable to create a lightning protection concept at the initial stage of planning a wind turbine in order to avoid later costly repairs and retrofitting.

scholarly journals Study of the Bearing Capacity of Stiffened Tall Offshore Wind Turbine Towers during the Erection Phase

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5102
Author(s):  
Yu Hu ◽  
Jian Yang ◽  
Charalampos Baniotopoulos
Keyword(s):  
Wind Energy ◽  
Bearing Capacity ◽  
Wind Turbine ◽  
Structural Response ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Nonlinear Buckling ◽  
Wind Turbine Towers ◽  
Nonlinear Buckling Analysis

Offshore wind energy is a rapidly maturing renewable energy technology that is poised to play an important role in future energy systems. The respective advances refer among others to the monopile foundation that is frequently used to support wind turbines in the marine environment. In the present research paper, the structural response of tall wind energy converters with various stiffening schemes is studied during the erection phase as the latter are manufactured in modules that are assembled in situ. Rings, vertical stiffeners, T-shaped stiffeners and orthogonal stiffeners are considered efficient stiffening schemes to strengthen the tower structures. The loading bearing capacity of offshore monopile wind turbine towers with the four types of stiffeners were modeled numerically by means of finite elements. Applying a nonlinear buckling analysis, the ultimate bearing capacity of wind turbine towers with four standard stiffening schemes were compared in order to obtain the optimum stiffening option.

scholarly journals Influence of cracks on the buckling of wind turbine towers

2020 ◽  
Vol 1618 ◽  
pp. 022001
Author(s):  
M. Capaldo ◽  
J. B. Orsatelli ◽  
J. Curt ◽  
E. Julan
Keyword(s):  
Wind Turbine ◽  
Wind Turbine Towers
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