Results 131 to 140 of about 433 (168)
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Mistuning Forced Response Characteristics Analysis of Mistuned Bladed Disks
Journal of Engineering for Gas Turbines and Power, 2010The problem of determining the worst-case mistuning pattern and robust maximum mistuning forced response of a mistuned bladed rotor is formulated and solved as an optimization problem. This approach is exemplified on a two-degrees-of-freedom per blade disk model, two three-degrees-of-freedom per blade disk models, and a mistuned two-stage bladed rotor.
Haitao Liao +3 more
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A New Mistuning Form in Periodic Structure - Force Mistuning
Advanced Materials Research, 2012The mistuning of periodic structure was generally considered to be natural parameter mistuning, such as stiffness mistuning, damping mistuning and mass mistuning. However, in engineering practice, there was another kind of mistuning——force mistuning, which has not been studied yet.
Guo Hui Yang, Ai Lun Wang, Xu Hui Cao
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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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A New Mistuning Form Existed in Periodic Structure-Force Mistuning
Applied Mechanics and Materials, 2012The mistuning of periodic structure was generally considered to be natural parameter mistuning, such as stiffness mistuning, damping mistuning and mass mistuning. However, in engineering practice, there was another kind of mistuning—force mistuning. Based on a typical concentrated parameter model of periodic structure, the vibration characteristics ...
Ai Lun Wang, Jie Chen, Qian Jin Wang
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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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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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Integrally Bladed Rotor Mistuning Identification and Model Updating Using Geometric Mistuning Models
Volume 11: Structures and Dynamics: Structural Mechanics, Vibration, and Damping; Supercritical CO2, 2020Abstract Non-uniform manufacturing variations and uneven usage wear and damage, referred to as mistuning, can drastically alter the dynamic response of Integrally Blade Rotors (IBR)s. Optical scanners, combined with Finite Element Model (FEM) mesh metamorphosis algorithms, have provided capabilities to create analytical models that ...
Joseph A. Beck +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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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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Logopedics Phoniatrics Vocology, 2010
This research describes the strategy of singers in reacting to the pitch deviation from equally tempered (ET) value in their ensemble partner's part in singing two-part a cappella music, and the ability of professional musicians to identify such deviations. Professional singers preferred to maintain the purity of melodic intervals in their own part and
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This research describes the strategy of singers in reacting to the pitch deviation from equally tempered (ET) value in their ensemble partner's part in singing two-part a cappella music, and the ability of professional musicians to identify such deviations. Professional singers preferred to maintain the purity of melodic intervals in their own part and
openaire +2 more sources