Results 141 to 150 of about 433 (168)
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A Fleet Risk Prediction Methodology for Mistuned IBRs using Geometric Mistuning Models
17th AIAA Non-Deterministic Approaches Conference, 2015An improved spatial statistical approach and probabilistic prediction method for mistuned integrally bladed rotors is proposed and validated with a large population of rotors. Prior work utilized blade-alone principal component analysis to model spatial variation arising from geometric deviations contributing to forced response mistuning amplification.
Emily B. Henry +2 more
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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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Control of mistuning level using hard coating for blisks based on mistuning identification technique
Aerospace Science and Technology, 2021Abstract Mistuning will lead to vibration localization of blisk, which seriously affects the service life of blisks. To control the mistuning level of blisks, a novel control method using hard coating is proposed. In this method, the thickness of hard coating is designed according to mistuning state of blisk substrate, so that, the mistuning level ...
Kunpeng Xu +3 more
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EFFICIENT ALGORITHMS FOR MISTUNING ANALYSIS
IFAC Proceedings Volumes, 2002Abstract This paper describes two algorithms to calculate bounds on the largest frequency response function that is attained when a large number of parameters is perturbed simultaneously within a box. The algorithms have been created to calculate worst-case responses of mistuned (perturbed) bladed disks, which is an important step in the analysis and
Mario A. Rotea, Fernando J. D'Amato
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The pitches of mistuned harmonics
The Journal of the Acoustical Society of America, 1994If a single harmonic of a complex tone is mistuned it can be heard as a separate entity. Pitch matching experiments show that the pitch of a mistuned harmonic does not agree with its frequency. The shift in pitch, caused by the complex context, is an exaggeration of the frequency mistuning.
Jian-Yu Lin, William Morris Hartmann
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Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model: Part 1 — Theory
Volume 4: Turbo Expo 2003, 2003This 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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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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Mistuning Identification of Bladed Disks Using a Fundamental Mistuning Model—Part II: Application
Journal of Turbomachinery, 2004This 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
openaire +1 more source
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
openaire +1 more source