Results 31 to 40 of about 4,892 (274)
Turbocharger blade vibration: Measurement and validation through laser tip-timing [PDF]
, 2012 High Cycle Fatigue (HCF) of turbine blades is a major cause of failure in turbochargers. In order to validate changes to blades intended to reduce fatigue failure, accurate measurement of blade dynamics is necessary. Strain gauging has limitations, so an
Allport, John +11 more
core +1 more source
A Blade Dynamic Strain Inversion Method for Rotating Blades Based on Blade Tip Timing
Journal of Physics: Conference Series, 2021 Abstract Based on the vibration response transfer ratio and Natural Neighbor Interpolation (NNI), the research on the noncontact inversion method of dynamic strain of high-speed rotating blades is carried out. The high-speed rotating blade is analyzed through the motion equation, and the correction method of the transfer ratio is ...
Haonan Guo +6 more
openaire +1 more source
Uncertainties in the calibration process of blade tip timing data against finite element model predictions [PDF]
, 2020 Blade stresses are determined from blade tip timing (BTT) data by relating the measured tip deflection to the stresses via Finite Element (FE) models. This process includes some uncertainties due to the following: 1) the shift in the equilibrium position
Mohamed, Mohamed +2 more
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CNN-based defect diagnosis method for rotating blades
You-qi chuyun, 2020 In order to solve the problem of difficult blade defect diagnosis caused by severe signal under-sampling in tiptiming technology, a defect diagnosis method for rotating blade based on convolution neural network (CNN) was proposed.In the method, the under-
Jiwang ZHANG +3 more
doaj +1 more source
Capacitance Tip Timing Techniques in Gas Turbines [PDF]
, 2003 The vibration of turbomachinery blades is an important phenomenon to understand, observe and predict and is the reason for developing a tip timing measurement system.
Lawson, Craig P.
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CALIBRATION OF BTT MEASUREMENT WITH RESPECT TO SENSOR POSITION OVER SHROUDED LSB
Acta Polytechnica CTU Proceedings, 2018 In order to increase efficiency and reliability of steam turbines, last stage blades are equipped with mid-span tie-boss and shroud. We can use Blade Tip-Timing method (BTT) to measure vibration of shrouded blades, but the measured level of vibration is ...
Tereza Dadáková, Zdeněk Kubín
doaj +1 more source
Experimental Testing of Tip-Timing Methods used for Blade Vibration Measurement in the Aero-Engine [PDF]
, 2004 An important component within the jet engine in terms of vibration and high cycle fatigue (HCF) is the blade. This is the component where continuously higher demands on weight and loading are being made.
Grant, Kelly
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International Journal of Rotating Machinery, 2007 Blade tip timing is a technique for the measurement of vibrations in rotating bladed assemblies. In Part I of this work a class of methods for the analysis of blade tip timing data from bladed assemblies undergoing two simultaneous synchronous resonances
J. Gallego-Garrido +3 more
doaj +1 more source
BTT & RFLB - THE OPTIMUM SET FOR STEAM TURBINE BLADES MONITORING
Acta Polytechnica CTU Proceedings, 2018 BTT, Blade Tip Timing system, is a commercially available system generating files of precise times of blade tips when passing sensors attached in a machine stator.
Miroslav Balda
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International Journal of Rotating Machinery, 2007 Blade tip timing is a technique for the measurement of vibrations in rotating bladed assemblies. Although the fundamentals of the technique are simple, the analysis of data obtained in the presence of simultaneously occurring synchronous resonances is ...
J. Gallego-Garrido +2 more
doaj +1 more source