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Turbomachine blade vibration
TLDR
In this paper, the authors present a detailed analysis of single and coupled blade-disc vibrations, as well as the effect of small aspect ratio on the number of vibrations.Abstract:
Single Blade Vibrations Discrete Analysis of Blades Small Aspect Ratio Blades Blade Group Frequencies and Mode Shapes Excitation Damping Forced Vibrations Transient Vibrations Coupled Blade-Disc Vibrations Some Thoughts on Fatigue Life Estimation Some Reflections Appendices: Heat Transfer and Thermal Stress of Turbine Blades SI Units Nomenclature Index.read more
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Journal ArticleDOI
Free Vibration of Pretwisted, Cantilevered Composite Shallow Conical Shells
TL;DR: In this article, free vibration analysis of composite shallow conical shells, incorporating the effects of pretwist, is presented, focusing on shells made of symmetrically and unsymmetrically laminated E-glass/epoxy with four and eight-ply laminates.
Journal ArticleDOI
Experimental and numerical investigation of friction element dissipative effects in blade shrouding
TL;DR: In this paper, a friction element placed in the shroud between the blade heads is used as a source of passive damping in various mechanical systems, and the effect of friction is studied for the case of harmonic excitation by suitable frequency and subsequent free vibration attenuation.
Journal ArticleDOI
Application of the Reissner method to derive the coupled bending-torsion equations of dynamic motion of rotating pretwisted cantilever blading with allowance for shear deflection, rotary inertia, warping and thermal effects
TL;DR: In this paper, the dynamic Reissner functional in conjunction with variational calculus has been employed to derive the equations of motion of pretwisted cantilever blades of asymmetric aerofoil cross section, with the blade assumed to be mounted on a rotating disc at a stagger angle.
Journal ArticleDOI
Dynamic Analysis of Rotating Nonuniform Timoshenko Beams With an Elastically Restrained Root
TL;DR: In this article, a systematic solution procedure for studying the dynamic response of a rotating nonuniform Timoshenko beam with an elastically restrained root is presented, where the partial differential equations are transformed into the ordinary differential equations by taking the Laplace transform.
Proceedings ArticleDOI
A Navier Stokes Analysis of Airfoils in Oscillating Transonic Cascades for the Prediction of Aerodynamic Damping
Reza S. Abharl,Michael B. Giles +1 more
TL;DR: In this article, an unsteady, compressible, two-dimensional, thin shear layer Navier-Stokes solver is modified to predict the motion-dependent flow around oscillating airfoils in a cascade.