Using nondimensional variables, the performances of friction dampers of a mistuned bladed disk assembly are examined for different types of excitation: white noise excitation, independent narrow band random excitation, and sinusoidal excitation with unknown amplitudes. Based on the harmonic balance method, an analytical technique is developed to compute the statistics of response for sinusoidal excitation with unknown amplitudes. The performances of blade-to-blade and blade-to-ground dampers are compared under different types of excitation. It is found that the nondimensional optimal normal loads of friction dampers are almost independent of the nature of excitation. Therefore, optimal normal loads of friction dampers can be chosen without any knowledge of the nature of excitation.
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April 2011
Research Papers
Computation of the Optimal Normal Load for a Mistuned and Frictionally Damped Bladed Disk Assembly Under Different Types of Excitation
Alok Sinha
Alok Sinha
Department of Mechanical and Nuclear Engineering,
e-mail: axs22@psu.edu
Pennsylvania State University
, University Park, PA 16802
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Douksoon Cha
Alok Sinha
Department of Mechanical and Nuclear Engineering,
Pennsylvania State University
, University Park, PA 16802e-mail: axs22@psu.edu
J. Comput. Nonlinear Dynam. Apr 2011, 6(2): 021012 (10 pages)
Published Online: November 15, 2010
Article history
Received:
September 21, 2006
Revised:
August 27, 2010
Online:
November 15, 2010
Published:
November 15, 2010
Citation
Cha, D., and Sinha, A. (November 15, 2010). "Computation of the Optimal Normal Load for a Mistuned and Frictionally Damped Bladed Disk Assembly Under Different Types of Excitation." ASME. J. Comput. Nonlinear Dynam. April 2011; 6(2): 021012. https://doi.org/10.1115/1.4002515
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