TY - GEN
T1 - Effects of unsteady aerodynamics on the dynamic response of mistuned bladed disks
AU - He, Zhijiang
AU - Epureanu, Bogdan I.
AU - Pierre, Christophe
PY - 2005
Y1 - 2005
N2 - This paper presents the preliminary results of studies on the dynamics of mistuned bladed disks including both structural and aerodynamic coupling. Aerodynamic coefficients calculated from a quasi-3D unsteady aerodynamic code are incorporated into a high-fidelity structural model employing the component mode mistuning (CMM) method. The extended CMM model is applied to the analysis of the dynamics of an industrial compressor stage. The eigenvalue structures of the tuned and mistuned systems including aerodynamic coupling are compared for the cases without structural damping, with small structural damping and with large structural damping. Also, the effect of aerodynamic coupling on the forced response of the system is investigated. For the cases studied, the large structural damping can change the eigenvalue structure of the mistuned system. Under certain conditions, the aerodynamic coupling is shown to decrease the mistuned forced response amplification factor compared to the tuned forced response.
AB - This paper presents the preliminary results of studies on the dynamics of mistuned bladed disks including both structural and aerodynamic coupling. Aerodynamic coefficients calculated from a quasi-3D unsteady aerodynamic code are incorporated into a high-fidelity structural model employing the component mode mistuning (CMM) method. The extended CMM model is applied to the analysis of the dynamics of an industrial compressor stage. The eigenvalue structures of the tuned and mistuned systems including aerodynamic coupling are compared for the cases without structural damping, with small structural damping and with large structural damping. Also, the effect of aerodynamic coupling on the forced response of the system is investigated. For the cases studied, the large structural damping can change the eigenvalue structure of the mistuned system. Under certain conditions, the aerodynamic coupling is shown to decrease the mistuned forced response amplification factor compared to the tuned forced response.
KW - Aerodynamic coupling
KW - CMM model
KW - Eigenvalue structure
KW - Forced response
KW - Mistuning
KW - Structural coupling
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M3 - Conference contribution
AN - SCOPUS:73849113844
SN - 0080444814
SN - 9780080444819
T3 - 3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
SP - 250
EP - 255
BT - 3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
T2 - 3rd M.I.T. Conference on Computational Fluid and Solid Mechanics
Y2 - 14 June 2005 through 17 June 2005
ER -