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TECHNICAL PAPERS

Modal Response of 3-Bladed Wind Turbines

[+] Author and Article Information
David J. Malcolm

Global Energy Concepts, LLC, Kirkland, WAe-mail: dmalcolm@globalenergyconcepts.com

J. Sol. Energy Eng 124(4), 372-377 (Nov 08, 2002) (6 pages) doi:10.1115/1.1509479 History: Received March 01, 2002; Revised June 01, 2002; Online November 08, 2002
Copyright © 2002 by American Institute of Physics
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References

Sutherland, H. J., 2001, “Preliminary Analysis of the Structural and Inflow Data From the LIST Program,” Proc. of AIAA/ASME Wind Energy Symp., Reno, NV, pp. 173–183.
Meirovitch, L., 1980, Computational Methods in Structural Dynamics, Sijthoff & Nordhoff.
Meirovitch,  L., 1975, “A Modal Analysis for the Response of Linear Gyroscopic Systems,” ASME J. Appl. Mech., 42(2), pp. 446–450.
Malcolm, D. J., 2001, “Aerodynamic Loads on HAWTs in Terms of Structural Modes,” Proc. of AIAA/ASME Wind Energy Symp., Reno, NV, pp. 411–418.
Coleman, R. P., and Feingold, A. M., 1958, “Theory of Self-Excited Mechanical Oscillations of Helicopter Rotors With Hinged Blades,” NACA Tech. Report TR 1351.
Dugundji, J., and Wendell, J. H., 1981, “Review of Analysis Methods for Rotating Systems With Periodic Coefficients,” Proc. of Wind Turbine Dynamics, NASA Conf. Pub. 2185, DOE Pub. CONF-810226, Cleveland, OH.
Malcolm, D. J., and James, G. H., 1996, “Identification of Natural Operating Modes of HAWTs From Modeling Data,” Proc. of ASME Wind Energy Symp., Houston, TX, pp. 24–31.
Kelley, N. D., Hand, M., Larwood, S., and McKenna, E., 2002, “The NREL Large Scale Turbine Inflow and Response Experiment-Preliminary Results,” Proc. of ASME/AIAA Wind Energy Symp., Reno, NV, pp. 412–426.
Kelley, N. D., Osgood, R., Bialasiewicz, J., and Jakubowski, A., 2000, “Using Time-Frequency and Wavelet Analysis to Assess Turbulence/Rotor Interactions,” Proc. of ASME/AIAA Wind Energy Symp., Reno, NV, pp. 130–149.
Mechanical Dynamics Inc., 1994, ADAMS/Solver Reference Manual, Version 8.0, Ann Arbor, MI.
Patil, M., Lee, D., and Hodges, D., 2001, “Multi-Flexible-Body Dynamic Analysis of Horizontal Axis Wind Turbines,” Proc. ASME/AIAA Wind Energy Symp., Reno, NV, pp. 369–399.
Lee, D., and Hodges, D., 2002, “A Framework for Dynamic and Aeroelastic Analysis of Horizontal Axis Wind Turbines,” Proc. of ASME/AIAA Wind Energy Symp., Reno, NV, pp. 223–236.
Bir, G., and Stol, K., 2000, “Modal Analysis of a Teetered-Rotor Turbine Using the Floquet Approach,” Proc. of AIAA/ASME Wind Energy Symp., Reno, NV, pp. 23–33.

Figures

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Schematic 3-bladed HAWT
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Schematic layout of procedure
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Campbell diagram of natural frequencies vs. rotor rpm for test turbine
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Loads and response due to vertical wind shear, mode 1
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Loads and response due to vertical wind shear, mode 2
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Loads and response due to vertical wind shear, mode 3
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Loads and response due to vertical wind shear, mode 4
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Loads and response due to vertical wind shear, mode 5
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Loads and response due to vertical wind shear, mode 6
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Loads and response due to vertical wind shear, mode 7
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Loads and response due to vertical wind shear, mode 8

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