Fluid-Structural Coupling Effects on the Dynamics of Mistuned Bladed Disks
نویسندگان
چکیده
A = aerodynamic stiffness matrix C = speed of sound E = complex Fourier matrix f , F = physical and modal forces h = height of stream tube j = imaginary unit K, M = stiffness and mass matrices NB = number of blades P, Q = modal transformation matrices p = flow pressure Q = flow mass flux at the boundary q = generalized (modal) coordinate s = distance along the boundary T = period of flow unsteadiness U = blade normal and constraint modes K, M = physical mistuned stiffness and mass matrices = structural damping c = ratio of specific heats = flow density = interblade phase angle = system and blade mode shapes = velocity potential of the flow = blade constraint mode shape ! = complex frequency Subscripts
منابع مشابه
Uncertainty quantification in nonlinear structural dynamics for mistuned bladed disks
The recent improvements in turbomachinery design combined to the unavoidable requirements of kerosene savings require to analyze the exceptional operating regime of bladed disks, for which large deformations and large displacements can occur. It seems then quite appropriate to consider the geometrically nonlinear effects in the computational models dedicated to the analysis of mistuned turbomac...
متن کاملForced response of mistuned bladed disks using reduced-order modeling
A reduced-order model formulation is presented for examining the forced response of tuned and mistuned bladed disks. The technique developed uses modal information obtained from highly detailed finite element models to create, in a systematic manner, much simpler and computationally inexpensive models of bladed disks. The small size of the reduced-order model and associated computational saving...
متن کاملDynamic Analysis and Design Strategies for Mistuned Bladed Disks
DYNAMIC ANALYSIS AND DESIGN STRATEGIESFOR MISTUNED BLADED DISKS
متن کاملCracking-Induced Mistuning in Bladed Disks
A study of the mechanisms of cracking-induced mistuning in bladed disks is presented in this paper. An analytical model for a bladed disk was formulated using lumped-mass-beams, and a cracked blade was represented by a beam with a through-crack at the root. Local stiffness reduction due to cracking was incorporated using a flexibility matrix method. The dynamic characteristics of the bladed dis...
متن کاملExperimental Investigation of Mistuned Bladed Disks System Vibration
EXPERIMENTAL INVESTIGATION ONMISTUNEDBLADED DISK SYSTEM VIBRATIONbyJia Li Co-Chairs: Christophe Pierre and Steven L. Ceccio Bladed disks are critical structural components in jet engines and other turbomachin-ery. The nominal design for a bladed disk is typically assumed to have identical blades.However, there are always small, random variations in the blade properties d...
متن کامل