Seismic Loading for FAST: May 2011 - August 2011

Asareh, M A; Prowell, I

doi:10.2172/1050131

Title: Seismic Loading for FAST: May 2011 - August 2011

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Abstract

As more wind farms are constructed in seismically active regions, earthquake loading increases in prominence for design and analysis of wind turbines. Early investigation of seismic load tended to simplify the rotor and nacelle as a lumped mass on top of the turbine tower. This simplification allowed the use of techniques developed for conventional civil structures, such as buildings, to beeasily applied to wind turbines. However, interest is shifting to more detailed models that consider loads for turbine components other than the tower. These improved models offer three key capabilities in consideration of base shaking for turbines: 1) The inclusion of aerodynamics and turbine control; 2) The ability to consider component loads other than just tower loads; and 3) An improvedrepresentation of turbine response in higher modes by reducing modeling simplifications. Both experimental and numerical investigations have shown that, especially for large modern turbines, it is important to consider interaction between earthquake input, aerodynamics, and operational loads. These investigations further show that consideration of higher mode activity may be necessary in theanalysis of the seismic response of turbines. Since the FAST code is already capable of considering these factors, modifications were developed that allow simulation of base shaking. This approachmore »« less

Authors:: Asareh, M A; Prowell, I

Publication Date:: Wed Aug 01 00:00:00 EDT 2012

Research Org.:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)

OSTI Identifier:: 1050131

Report Number(s):: NREL/SR-5000-53872
AFT-1-11324-01; TRN: US201218%%647

DOE Contract Number:: AC36-08GO28308

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

Subject:: 17 WIND ENERGY; AERODYNAMICS; DESIGN; EARTHQUAKES; MODIFICATIONS; ROTORS; SIMULATION; WIND TURBINE ARRAYS; WIND TURBINES; WIND POWER; wind turbines; wind farms; seismic loads; models

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                    Asareh, M A, and Prowell, I. Seismic Loading for FAST: May 2011 - August 2011.  United States: N. p., 2012. 
        Web.  doi:10.2172/1050131.

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                    Asareh, M A, & Prowell, I. Seismic Loading for FAST: May 2011 - August 2011.  United States.  https://doi.org/10.2172/1050131

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                    Asareh, M A, and Prowell, I. 2012.  
        "Seismic Loading for FAST: May 2011 - August 2011".  United States.  https://doi.org/10.2172/1050131.  https://www.osti.gov/servlets/purl/1050131.

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@article{osti_1050131,

  title        = {Seismic Loading for FAST: May 2011 - August 2011},

  author       = {Asareh, M A and Prowell, I},

  abstractNote = {As more wind farms are constructed in seismically active regions, earthquake loading increases in prominence for design and analysis of wind turbines. Early investigation of seismic load tended to simplify the rotor and nacelle as a lumped mass on top of the turbine tower. This simplification allowed the use of techniques developed for conventional civil structures, such as buildings, to beeasily applied to wind turbines. However, interest is shifting to more detailed models that consider loads for turbine components other than the tower. These improved models offer three key capabilities in consideration of base shaking for turbines: 1) The inclusion of aerodynamics and turbine control; 2) The ability to consider component loads other than just tower loads; and 3) An improvedrepresentation of turbine response in higher modes by reducing modeling simplifications. Both experimental and numerical investigations have shown that, especially for large modern turbines, it is important to consider interaction between earthquake input, aerodynamics, and operational loads. These investigations further show that consideration of higher mode activity may be necessary in theanalysis of the seismic response of turbines. Since the FAST code is already capable of considering these factors, modifications were developed that allow simulation of base shaking. This approach allows consideration of this additional load source within a framework, the FAST code that is already familiar to many researchers and practitioners.},

  doi          = {10.2172/1050131},

  url          = {https://www.osti.gov/biblio/1050131},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Aug 01 00:00:00 EDT 2012},

  month        = {Wed Aug 01 00:00:00 EDT 2012}

}

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