Results 161 to 170 of about 2,060 (206)
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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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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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Optimization of Intentional Mistuning Patterns for the Mitigation of the Effects of Random Mistuning
Journal of Engineering for Gas Turbines and Power, 2014This 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 +3 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.
openaire +2 more sources
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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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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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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Dichotic beats of mistuned consonances
The Journal of the Acoustical Society of America, 1997The beats of mistuned consonances (BMCs) result from the presentation of two sinusoids at frequencies slightly mistuned from a ratio of small integers. Several studies have suggested that the source of dichotic BMCs is an interaction within a binaural critical band.
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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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Computation of Mistuning Effects on Cascade Flutter
AIAA Journal, 2000A 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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