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Author Pahn, Thomas.

Title Inverse load calculation of wind turbine support structures [electronic resource] : a numerical verification using the comprehensive simulation code FAST, preprint / Thomas Pahn ... [et al.].

Imprint [Golden, CO] : National Renewable Energy Laboratory, [2012]


Location Call No. OPAC Message Status
 Axe Federal Documents Online  E 9.17:NREL/CP-5000-54675    ---  Available
Edition Rev. ed.
Description 1 online resource ([13] p.) : col. ill.
Series NREL/TP ; 5000-54675
NREL/TP ; 5000-54675
Note Title from PDF title screen (viewed Mar. 25, 2013).
Presented at the 53rd Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 23 - 26, 2012."
"Revised November 2012."
"Original publication date: April, 2012."--Errata sheet.
"Contract No. DE-AC36-08GO28308."
Bibliography Includes bibliographical references (p. 12-13).
Summary Physically measuring the dynamic responses of wind turbine support structures enables the calculation of the applied loads using an inverse procedure. In this process, inverse means deriving the inputs/forces from the outputs/responses. This paper presents results of a numerical verification of such an inverse load calculation. For this verification, the comprehensive simulation code FAST is used. FAST accounts for the coupled dynamics of wind inflow, aerodynamics, elasticity and turbine controls. Simulations are run using a 5-MW onshore wind turbine model with a tubular tower. Both the applied loads due to the instantaneous wind field and the resulting system responses are known from the simulations. Using the system responses as inputs to the inverse calculation, the applied loads are calculated, which in this case are the rotor thrust forces. These forces are compared to the rotor thrust forces known from the FAST simulations. The results of these comparisons are presented to assess the accuracy of the inverse calculation. To study the influences of turbine controls, load cases in normal operation between cut-in and rated wind speed, near rated wind speed and between rated and cut-out wind speed are chosen. The presented study shows that the inverse load calculation is capable of computing very good estimates of the rotor thrust. The accuracy of the inverse calculation does not depend on the control activity of the wind turbine.
System Details Full text available via Internet in .pdf format. Adobe Acrobat Reader required.
Subject Wind turbines -- Design and construction.
Wind turbines -- Research.
FAST (computer program)
Added Author Rolfes, Raimund.
Jonkman, J. M. (Jason Mark)
Robertson, Amy N.
Leibniz Universitat Hannover.
National Renewable Energy Laboratory (U.S.)
AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference (53rd : 2012 : Honolulu, Hawaii)
Gpo Item No. 0430-P-04 (online)
Sudoc No. E 9.17:NREL/CP-5000-54675

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