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Experimental validation of FEM-computed stress to tip deflection ratios of aero-engine compressor blade vibration modes and quantification of associated uncertainties
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SYSNO ASEP 0563591 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Experimental validation of FEM-computed stress to tip deflection ratios of aero-engine compressor blade vibration modes and quantification of associated uncertainties Author(s) Mohamed, E.M. (GB)
Bonello, P. (GB)
Russhard, P. (GB)
Procházka, Pavel (UT-L) RID, ORCID
Mekhalfia, Mohammed Lamine (UT-L)
Tchawou Tchuisseu, Eder Batista (UT-L) ORCIDNumber of authors 6 Article number 109257 Source Title Mechanical Systems and Signal Processing. - : Elsevier - ISSN 0888-3270
Roč. 178, October (2022)Number of pages 25 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords blade tip timing ; FEM validation ; vibration measurements ; blade stresses Subject RIV BI - Acoustics OECD category Applied mechanics R&D Projects EF15_003/0000493 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UT-L - RVO:61388998 UT WOS 000808123300001 EID SCOPUS 85130095262 DOI 10.1016/j.ymssp.2022.109257 Annotation Blade Tip Timing (BTT) technology is concerned with the estimation of turbomachinery blade stresses. The stresses are determined from BTT data by relating the measured tip deflection to the stresses via Finite Element (FE) models. The correlation of BTT measurements with FE predictions involves a number of uncertainties. This paper presents the process for validating the FE stress and deflection predictions of aero-engine compressor blades under non-rotation conditions as a critical preliminary step towards the complete understanding of their dynamic behaviour under rotating conditions when using BTT measurements. The process steps are described in detail, including the FE modelling and analysis of the blades and the blade-disk assembly, and the measurements of the blade tip deflection and blade stress. Furthermore, the uncertainties associated with the FE modelling and the measurement processes are quantified. The results show that the FE model is valid considering the control of most uncertainties. The experimental validation of the FE computed stress-to-tip deflection calibration factors in the present study provides the basis for the determination of the calibration factors under rotational conditions using a previously presented BTT data simulator, and for the design of corresponding rotating experiments using BTT. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0888327022004058/pdfft?isDTMRedir=true&download=true
Number of the records: 1