Results 151 to 160 of about 471 (183)
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Optimization of Intentional Mistuning for Bladed Disk : Intentional Mistuning Intensity Effect
2008In turbomachinery rotor, there are small differences in the structural and/or geometrical properties of individual blades, which are referred to as blade mistuning. Mistuning effects of the forced response of bladed disks can be extremely large as often reported in many studies.
ByeongKeun Choi +5 more
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On the "mistuning" of weighted forks
Journal of Scientific Instruments, 1928Weighted tuning-forks in general use are so constructed that the weights cannot be adjusted with very great exactness. The question is raised whether an important error is apt to result. Photographic records are submitted which show the vibrations from both prongs when the weights have been unequally set.
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Mistuned Response Prediction of Dual Flow-Path Integrally Bladed Rotors With Geometric Mistuning
Journal of Engineering for Gas Turbines and Power, 2015The geometric mistuning problem is investigated for dual flow-path integrally bladed rotors (DFIBRs) by outlining two methods that explicitly account for blade geometry surface deviations. The methods result in reduced-order models (ROMs) that are a reduced form of a parent Craig–Bampton component mode synthesis (CB-CMS) model.
Joseph A. Beck +4 more
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Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model: Part 2 — Application
Volume 4: Turbo Expo 2003, 2003This paper is the second in a two-part study of identifying mistuning in bladed disks. It presents experimental validation of a new method of mistuning identification based on measurements of the vibratory response of the system as a whole. As a system based method, this approach is particularly suited to integrally bladed rotors, whose blades cannot ...
D. M. Feiner, J. H. Griffin
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Impulse Mistuning of Blades and Vanes
Journal of Engineering for Gas Turbines and Power, 2016Impulse mistuning is an alternative approach for the reduction of vibration stresses of blades and vanes. In contrast to most other approaches, it is not a direct energy dissipation approach but a mistuning based one. However, the approach is not aimed at making use of the geometrical mistuning of the structure (e.g., a blade or a vane stage ...
Andreas Hartung +2 more
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Optimization and Mechanisms of Mistuning in Cascades
Journal of Engineering for Gas Turbines and Power, 1985An inverse design procedure has been developed for the optimum mistuning of a high bypass ratio shroudless fan. The fan is modeled as a cascade of blades, each with a single torsional degree of freedom. Linearized supersonic aerodynamic theory is used to compute the unsteady aerodynamic forces in the influence coefficient form at a typical blade ...
E. F. Crawley, K. C. Hall
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Phantom beats in mistuned chords
The Journal of the Acoustical Society of America, 1983Beats are heard in slightly mistuned musical intervals. For example, a mistuned fifth with frequencies f1 = 804 Hz and f2 = 1204 Hz will produce 4 beats per second. These beats have been attributed to interaction between the 3rd harmonic of f1 at 2412 Hz and the 2nd harmonic of f2 at 2408 Hz.
J. L. Hall, M. V. Mathews, L. A. Roberts
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Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model—Part I: Theory
Journal of Turbomachinery, 2004This paper is the first in a two-part study of identifying mistuning in bladed disks. It develops a new method of mistuning identification based on measurements of the vibratory response of the system as a whole. As a system-based method, this approach is particularly suited to integrally bladed rotors, whose blades cannot be removed for individual ...
D. M. Feiner, J. H. Griffin
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Damping Identification for Mistuned Blisks
Volume 5: 22nd International Conference on Design Theory and Methodology; Special Conference on Mechanical Vibration and Noise, 2010A novel structural damping identification method is presented. The approach is robust with respect to measurement noise and makes use of highly effective reduced-order-models (ROMs). Several different methods are currently available for damping identification.
Darren E. Holland +2 more
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Mistuning and Damping of Turbine Impellers
MTZ worldwide, 2015Modern combustion engines have to comply with a permanently growing requirement profile with respect to economy, power and environmental acceptability. In this regard, the turbocharging technology became more significant. Primarily, casted radial impellers are deployed in small and medium sized turbochargers with wheel diameters ranging between 30 and ...
Thomas Maywald +2 more
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