Results 41 to 50 of about 72,876 (262)

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, Russhard, P, Bonello, Philip   +2 more
core   +1 more source

A Class of Methods for the Analysis of Blade Tip Timing Data from Bladed Assemblies Undergoing Simultaneous Resonances—Part I: Theoretical Development

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, G. Dimitriadis, J. R. Wright   +2 more
doaj   +1 more source

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, Xueli WANG, Haibo XIE, Keqin DING   +3 more
doaj   +1 more source

Degradation mechanism of the von Willebrand factor A2 domain by nattokinase

FEBS Letters, EarlyView.
Nattokinase, a natto‐derived protease, exhibits potent antithrombotic effects. This study demonstrates that nattokinase directly cleaves the von Willebrand factor (vWF) A2 domain in vitro. Unlike the native regulator ADAMTS13, nattokinase degrades folded vWF independently of shear stress.
Ryuichi Hyakumoto, Masatomo So, Ayako Furukawa, Kenji Sugase   +3 more
wiley   +1 more source

Mode family identification of a blisk by tip timing measurements [PDF]

, 2011
Colloque avec actes et comité de lecture. Internationale.International audienceThe study consists in tip timing measurements to identify a mode belonging to a certain family (flexural, torsional, etc).
Blanc, Laurent, Thouverez, Fabrice, Gibert, Claude, Kharyton, Vsevolod   +3 more
core   +2 more sources

Design and Uncertainty Evaluation of a Calibration Setup for Turbine Blades Vibration Measurement

Sensors
Turbomachinery engines face significant failure risks due to the combination of thermal loads and high-amplitude vibrations in turbine and compressor blades.
Lorenzo Capponi, Giulio Tribbiani, Vittoria Medici, Sara Fabri, Andrea Prato, Paolo Castellini, Alessandro Schiavi, Nicola Paone, Gianluca Rossi   +8 more
doaj   +1 more source

A Torsional Vibration Measurement Method for Rotating Blades Based on Blade Tip Timing

Shock and Vibration, 2021
During the working process of the turbine, some types of faults can cause changes in the vibration characteristics of the blades. The real-time vibration monitoring of the blades is of great significance to the stable operation and state-based ...
Haonan Guo, Yongmin Yang, Fengjiao Guan, Haifeng Hu, Guoji Shen, Suiyu Chen, Zifang Bian   +6 more
doaj   +1 more source

Synchronous Vibration Parameter Recognition of Constant-Speed Blades Based on Blade Tip Clearance Measurement

Applied Sciences, 2023
A new method for the synchronous vibration parameter identification of constant-speed rotating blades based on blade tip clearance (BTC) measurement and blade tip timing (BTT) is introduced.
Liang Zhang, Yiming Xia, Cong Chen, Qingxi Song, Junjun Cao   +4 more
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

FEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Articulatory correlates of consonantal length contrasts: The case of Japanese mimetic geminates [PDF]

JASA Express Letters
This study investigates the articulatory correlates of consonantal length contrasts in Japanese mimetic words using electromagnetic articulography data.
Francesco Burroni, Shigeto Kawahara, Jason A. Shaw   +2 more
doaj   +1 more source