Calculation of dynamic stresses acting on wind turbine blades using finite element method

Mahri, Z. L.; Rouabah, M. S.
December 2008
Journal of the Association of Arab Universities for Basic & Appl;2008, Vol. 6, p32
Academic Journal
The aim of this work is the calculation of dynamic loads and stresses acting on wind turbine blades. The prediction of the dynamic behaviour of the blades constitutes is one of the most important processes in the design of wind turbines. Initially, the blade element theory was used to calculate aerodynamic loads applied on the rotor. This method can be also used to estimate the power coefficient and the total power extracted by the turbine, A modal analysis of the rotor was carried out in order to compute the frequencies and the mode shapes of the blades. This analysis is useful for estimating dynamic loads. Finally, the dynamic stresses were calculated for the root region of the blades using finite element modelling. The resulting curves of stresses versus time, obtained for different wind speeds, may be utilized in a latter study for fatigue analysis, in order to make an optimal choice of blades resistant to fatigue and being energetically efficient.


Related Articles

  • Study on variable pitch strategy in H-type wind turbine considering effect of small angle of attack. Zhenzhou Zhao; Siyuan Qian; Wenzhong Shen; Tongguang Wang; Bofeng Xu; Yuan Zheng; Ruixin Wang // Journal of Renewable & Sustainable Energy;2017, Vol. 9 Issue 5, p1 

    Variable-pitch (VP) technology is an effective approach to upgrade the aerodynamics of the blade of an H-type vertical-axis wind turbine (VAWT). At present, most of the research efforts are focused on the performance improvement of the azimuth angle owing to the large angle of attack (AoA). On...

  • Wind Power Is Set to Become World's Leading Energy Source. Brown, Lester R. // Humanist;Sep/Oct2003, Vol. 63 Issue 5, p5 

    Discusses the potential for wind power to become the world's leading energy source. Advances in wind turbine design; Reasons for the popularity of wind.

  • UTILITIES: Turning, not burning, for power.  // Indianapolis Business Journal;11/10/2008, Vol. 29 Issue 36, p15A 

    The article reports on the move of Indiana Municipal Power Agency (IMPA) to purchase energy resources from Crystal Lake Wind Energy Center in Hancock County, Iowa. According to the author, the company will buy approximately 50 megawatts which is sufficient to support 15,000 homes as well as...

  • Power From Fire Island. Martin, Gary L. // Alaska Business Monthly;Feb2005, Vol. 21 Issue 2, p44 

    Focuses on the prospects for the use of wind turbines as source of energy in Alaska. Concern over the decline in amount of electricity being created by natural gas generators in the state; Use of wind turbines in Canada and in the United States to supplement primary technologies used to generate...

  • Renewables: putting the wind back in UK sails. Osborne, Mike // Local Authority Waste & Recycling;Nov2007, Vol. 15 Issue 11, p34 

    The author comments on the potential of offshore wind turbines in meeting the energy needs of Great Britain. Information is presented on the looming energy crisis in Great Britain in line with the upcoming closure of the country's nuclear power stations. An overview of the impact of the use of...

  • Winning with Wind Power. Jayne, David // Teen Ink;Apr2006, Vol. 17 Issue 8, p50 

    The author advocates the increased use of wind power. It discusses several reasons the use of wind turbines should be increased. It compares wind turbines with nuclear power. The "Nuclear Issues Briefing Paper 38," of the Uranium Information Centre states that wind energy is projected to supply...

  • Overview of different wind generator systems and their comparisons. Li, H.; Chen, Z. // IET Renewable Power Generation;Jun2008, Vol. 2 Issue 2, p123 

    With rapid development of wind power technologies and significant growth of wind power capacity installed worldwide, various wind turbine concepts have been developed. The wind energy conversion system is demanded to be more cost-competitive, so that comparisons of different wind generator...

  • 1071. Dynamic stability analysis on large wind turbine blade under complicated offshore wind conditions. J. P. Zhang; D. L. Li; Y. Han; D. M. Hu; J. X. Ren // Journal of Vibroengineering;Sep2013, Vol. 15 Issue 3, p1597 

    The aerodynamic loads of a wind turbine blade under complicated offshore wind conditions were analyzed using Davenport wind spectrum model, which represents the real working conditions closely. Finite element model of the blade was generated by using UG and ANSYS, and qualitative analysis and...

  • Introduction.  // Wind Power Report;2004, Vol. 2, p10 

    Presents an overview of the status of the global wind power industry as of 2003. Growing world wind energy capacity; Types of modern wind turbine; Energy yields; Development of wind farms; Key features of an onshore and an offshore wind farm; Small wind turbines; Environmental aspects;...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics