Experimental Investigation of Mistuned Bladed Disks System Vibration PDF Download
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Author: Jia Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 398
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Book Description
Author: Jia Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 398
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 27
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Book Description
Turbomachinery rotors, or bladed disks, are known to suffer from severe vibration problems due to small, random deviations (mistuning) of the blade properties. Mistuning can lead to dramatic increases in the maximum blade stress and cause high cycle fatigue (HCF), which is a major cost, readiness, and safety concern for the U.S. Air Force. The primary objective of this research was to provide significantly improved understanding, modeling, and prediction of the vibration response of mis-tuned bladed disk systems by including the effects of important phenomena that had been largely neglected in previous mistuning models. The models developed in this research program were used to investigate the interaction of blade mistuning with aerodynamic coupling, stage-to-stage connections for multistage rotors, blade damage, and nonlinearities. In addition, key mistuning phenomena were examined through vibration testing of blisks (single-piece bladed disks). New methods were developed for identifying blade mistuning parameters from test data and for running experimental Monte Carlo assessments of the effects of mistuning on the system forced response.
Author:
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ISBN:
Category :
Languages : en
Pages : 0
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Book Description
A state-of-the-art facility has been developed for the experimental study of the vibratory response of bladed-disk assemblies. An Electronic Speckle Pattern Interferometry system provides real-time, full-field imaging of the vibration of a test specimen, while a Single Point Laser Vibrometer, mounted on a two-stage linear positioning assembly, provides high accuracy quantitative vibration measurements at any location on the surface of the specimen. Vibration of the test specimen is driven by a novel acoustic excitation system, which delivers a traveling-wave forcing to the blink specimen that replicates the excitation to which industrial bladed disks are subject. A 24-blade experimental blink (integral bladed disk) has been designed and manufactured to precision tolerances specifically for use in this experimental facility. The blink is nearly perfectly tuned but can be systematically mistuned in a controlled fashion in order to study mistuning phenomena. The setup has been shown to be extremely effective at rapidly identifying and accurately quantifying the complex vibration characteristics of blinks. The measurement capabilities provided with this unique facility will allow the dynamic behaviors in both tuned and mistuned configurations to be thoroughly documented and compared with predictions based on existing and developing theories of mistuning phenomena. This facility will also be used to develop a method for identifying the mistuning characteristics of industrial blinks.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 492
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Book Description
Author: John A. Judge
Publisher:
ISBN:
Category :
Languages : en
Pages : 576
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Author: Garrett K. Lopp
Publisher:
ISBN:
Category :
Languages : en
Pages : 214
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Book Description
This research provides the framework to extend RFD to more realistic applications when the SDOF assumption breaks down, such as in cases of blade mistuning. Mistuning is inherently random; thus, a Monte Carlo analysis performed on a computationally cheap lumpedparameter model provides insight into RFD performance for various test parameters. Application of a genetic algorithm reduces the computational expense required to identify the optimal set of stiffness-state switches. This research also develops a low-order blisk model with blade-mounted piezoelectric patches as a tractable first step to apply RFD to more realistic systems. Application of a multi-objective optimization algorithm produces Pareto fronts that aid in the selection of the optimized patch parameters. Experimental tests utilizing the academic blisk with the optimized patches provides validation.
Author: Md. Zahurul Haq
Publisher: BoD – Books on Demand
ISBN: 953510103X
Category : Technology & Engineering
Languages : en
Pages : 406
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Book Description
Measurement is a multidisciplinary experimental science. Measurement systems synergistically blend science, engineering and statistical methods to provide fundamental data for research, design and development, control of processes and operations, and facilitate safe and economic performance of systems. In recent years, measuring techniques have expanded rapidly and gained maturity, through extensive research activities and hardware advancements. With individual chapters authored by eminent professionals in their respective topics, Applied Measurement Systems attempts to provide a comprehensive presentation and in-depth guidance on some of the key applied and advanced topics in measurements for scientists, engineers and educators.
Author:
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 236
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Book Description
Author: Paul P. Lin
Publisher: Trans Tech Publications Ltd
ISBN: 303813709X
Category : Technology & Engineering
Languages : en
Pages : 2450
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Book Description
Volume is indexed by Thomson Reuters CPCI-S (WoS). This volume covers all aspects of vibration, structural engineering and measurement: in particular, vibration engineering, structural engineering, building materials and measurement. All of the papers were reviewed by several expert referees, and the book thus provides the reader with a broad and reliable overview of the latest advances in these fields.
Author: Jiazhong Zhang
Publisher: Springer Nature
ISBN: 3030943011
Category : Technology & Engineering
Languages : en
Pages : 281
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Book Description
This contributed volume presents recent developments in nonlinear dynamics applied to engineering. Specifically, the authors address stability and bifurcation in large-scale, complex rotor dynamic systems; periodic motions and their bifurcations in nonlinear circuit systems, fault diagnosis of complex engineering systems with nonlinear approaches, singularities in fluid-machinery and bifurcation analysis, nonlinear behaviors in rotor dynamic system with multi-mistuned blades, mode localization induced by mistuning in impellers with periodical and cyclic symmetry, and nonlinear behaviors in fluid-structure interaction and their control. These new results will maximize reader understand on the recent progress in nonlinear dynamics applied to large-scale, engineering systems in general and nonlinear rotors and impellers in particular.
