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Discussion of the Available Methods for Blade Vibration Measurement
Piping and Component Analysis and Diagnosis, 2002Blade vibration has been recognized as one major and costly cause of failure in turbo-machinery. Its vibration measurement has attracted many investigators where until now there is no single reliable approach can be identified. Blade vibration measurement techniques can be classified into two broad categories, namely; (1) the direct approach that ...
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Holographic Measurement of Compressor Blade, Turbine Blade and Airframe Panel Vibration Distribution
SAE Technical Paper Series, 1969<div class="htmlview paragraph">Holographic vibration tests have been conducted to determine the vibration mode shapes of jet engine turbine and compressor blades and airframe panels. Tests were conducted using piezoelectric transducers, electromechanical and electromagnetic vibrators, and acoustic drivers of excitation.
W. G. Alwang, R. Burr, L. A. Cavanaugh
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Vibration measurement of compressor blades with fiber Bragg grating
2018 International Conference on Electronics Technology (ICET), 2018We reported the vibration measurement of compressor blades by using fiber Bragg gratings. The low order vibration modes were focused on and the corresponding distributions of FBGs were designed. The arrangement position of the fiber Bragg grating sensor was determined by analyzing the strain distribution of the blade model in the low order mode. It was
Kai Xie +7 more
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Blade-Tip Timing Measurement Of Synchronous Vibrations Of Rotating Bladed
2002Blade-tip timing (BTT) is a promising method for the detection, measurement and analysis of blade vibrations in rotating bladed assemblies. However, the intricacies of the method when applied to real rotating structures undergoing synchronous (Engine Ordered) vibrations are not yet fully understood.
Dimitriadis, Grigorios +3 more
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Turbine blade vibration measurement methods for turbocharges
2016This paper presents and compares the most important and often used methods to measure turbine blade vibrations: use of strain gauges and telemetry system which is an intrusive method or, on the other site. The Blade Tip Timing (BTT) method known as Non-Intrusive Stress Measurement (System) NSMS.
Janicki, Grzegorz +3 more
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Non-Contact Vibration Measurements of Mistuned Coupled Blades
Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, 1997Most of the turbomachine manufacturers are using a non-contact measurement system to measure blade vibration by two probes located in the casing radially outside a blade row. All blades of a row can be observed by this system, therefore it may be considered to be an ideal solution for measuring the vibration response of mistuned blades which have quite
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Measurements of the inflow to a vibrating rotor blade
30th Aerospace Sciences Meeting and Exhibit, 1992S.-G. LIOU, N. KOMERATH
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On-Engine Measurement of Automotive Turbocharger Turbine Blade Vibration
SAE Technical Paper Series<div class="section abstract"><div class="htmlview paragraph">Automotive turbochargers are carefully designed to avoid resonance of the turbine blades and backwall, which can result in High Cycle Fatigue failures. Blade Tip Timing is an established technique which utilizes fiber optic probes to measure turbine blade displacements in real ...
JORDAN SCHWARZ +4 more
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SLDV technology for measurement of mistuned bladed disc vibration
2008Bladed discs are very sensitive structures and the amplitude vibration of each blade can vary significantly from blade to blade due to a series of factors such as geometrical inhomogeneity between blades or material properties. These factors lead to bladed disks mistuned thus the forced response amplitudes can be much higher than the level predicted ...
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