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Computation of Mistuning Effects on Cascade Flutter [PDF]
AIAA Journal, 2000 A computational method is described for predicting eutter of turbomachinery cascades with mistuned blades. Themethodsolves theunsteadyEuler/Navier‐Stokesequationsformultiple-bladepassageson aparallel computer usingthemessagepassinginterface. Asecond-orderimplicit schemewithdualtime-steppingand multigrid isused.
Mani Sadeghi, Feng Liu
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Exploration of blade detuning tests for mistuning identification of blisks [PDF]
Mechanical Systems and Signal Processing, 2022 This paper presents a novel blade mistuning identification method based on blade detuning tests. Blade detuning tests consist of blade-by-blade impact testing in a blisk with detuning masses purposefully attached on all the blades except the one ...
Biao Zhou
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Analysis of mistuned cyclic systems using mistune modes
Applied Mathematics and Computation, 1995The bladed disk assembly, a prime example of a cyclic system, forms an important component of modern turbomachinery. Vibration of the blades leads to fatigue damage and limits their service life. Analysis of these systems is complicated by the combination of coupling of blade dynamics with mistuning of the blade properties.
Watson, Brian C., Kamat, Manohar P.
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Modelling and analysis of a bladed drum subject to the Coriolis and mistuning effects [PDF]
International Journal of Mechanical Sciences, 2022 International audienceThe interaction between the Coriolis and mistuning effects on a finite-element model (FEM) of a simplified bladed drum compressor has been investigated in this paper.
Fabrice Thouverez
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Mistuning Intensity Effect to Optimization of Mistuning Pattern for Bladed Disk
Journal of Fluid Machinery, 2007??일반적으로 터보 기계에서 mistuning은 구조적, 기하학적인 면에서의 blade와 blade 사이의 미소한 특성의 차이를 의미하며, 이러한 미소한 차이가 강제 진동 시, 발생하는 진동 에너지가 몇 개의 blade 또는 하나의 blade에 집중되어 매우 큰 진동을 야기 시킬 수 있다는 사실이 여러 논문들에 언급되고 있다. 또한 mistuning에 대한 blade 시스템의 강제진동응답의 감도를 줄이기 위하여, intentional mistuning개념을 설계단계에 도입하려고 하는 연구도 진행되고 있다.
Byeong-Keun Choi +4 more
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Reduced Order Models for Largely Mistuned Blisks with Small Random Mistuning
AIAA Journal, 2020Mistuning can break the cyclic symmetry of an ideally tuned blisk and cause its forced response to increase drastically.
Junnan Gao +4 more
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The Journal of the Acoustical Society of America, 1967
Two simultaneously sounding simple tones of M and N cps, respectively, with M:N slightly different from m:n (both small integral numbers) may give rise to a beat sensation with mN − nM beats per second. For the case m = 1, these beats are usually explained as resulting from harmonics created in the ear by distortion.
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Two simultaneously sounding simple tones of M and N cps, respectively, with M:N slightly different from m:n (both small integral numbers) may give rise to a beat sensation with mN − nM beats per second. For the case m = 1, these beats are usually explained as resulting from harmonics created in the ear by distortion.
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Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, 2022
Abstract A radial turbine impeller of an exhaust turbocharger is analyzed in view of both free vibration and forced response. Due to random blade mistuning resulting from unavoidable inaccuracies in manufacture or material inhomogeneities, localized modes of vibration may arise, which involve the risk of severely magnified blade ...
Alex Nakos, Bernd Beirow, Arthur Zobel
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Abstract A radial turbine impeller of an exhaust turbocharger is analyzed in view of both free vibration and forced response. Due to random blade mistuning resulting from unavoidable inaccuracies in manufacture or material inhomogeneities, localized modes of vibration may arise, which involve the risk of severely magnified blade ...
Alex Nakos, Bernd Beirow, Arthur Zobel
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Optimization of Intentional Mistuning Patterns for the Mitigation of the Effects of Random Mistuning
Volume 5: Structures and Dynamics, Parts A and B, 2008This paper focuses on the optimization of intentional mistuning patterns for the reduction of the sensitivity of the forced response of bladed disks to random mistuning. Intentional mistuning is achieved here by using two different blade types (denoted as A and B) around the disk.
Yun Han, Marc P. Mignolet
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Probabilistic Mistuning Assessment Using Nominal and Geometry Based Mistuning Methods
Journal of Turbomachinery, 2012Two deterministic mistuning models utilizing component mode synthesis methods are used in a Monte Carlo simulation to generate mistuned response distributions for a geometrically perturbed integrally bladed rotor. The first method, a frequency-perturbation approach with a nominal mode approximation used widely in academia and industry, assumes airfoil ...
Joseph A. Beck +3 more
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