Uncertainties in the calibration process of blade tip timing data against finite element model predictions

Mohamed Mohamed; Philip Bonello; P  Russhard

doi:10.1201/9781003132639

Uncertainties in the calibration process of blade tip timing data against finite element model predictions

Mohamed Mohamed, Philip Bonello, P Russhard

Mechanical and Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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Abstract

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 of the blade tip due to steady deflection and/or movements, 2) the change in effective stiffness due to rotation-induced inertia, which affects the BTT-stress calibration factors, 3) the assumption of constant speed over a single revolution that is made in most of BTT algorithms, which is not appropriate for rapid speed rates. This study shows the effect of such uncertainties on the vibration measurement and blade stress estimations.

Original language	English
Title of host publication	VIRM 12: Vibrations in Rotating Machinery conference
ISBN (Electronic)	9781003132639
DOIs	https://doi.org/10.1201/9781003132639
Publication status	Published - 22 Oct 2020
Event	Vibrations in Rotating Machinery conference - Online Duration: 14 Oct 2020 → 15 Oct 2020

Conference

Conference	Vibrations in Rotating Machinery conference
Abbreviated title	VIRM 12
City	Online
Period	14/10/20 → 15/10/20

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Final paper_v2_Mohamed Mohamed_0054Accepted author manuscript, 640 KB

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title = "Uncertainties in the calibration process of blade tip timing data against finite element model predictions",

abstract = "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 of the blade tip due to steady deflection and/or movements, 2) the change in effective stiffness due to rotation-induced inertia, which affects the BTT-stress calibration factors, 3) the assumption of constant speed over a single revolution that is made in most of BTT algorithms, which is not appropriate for rapid speed rates. This study shows the effect of such uncertainties on the vibration measurement and blade stress estimations.",

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AU - Mohamed, Mohamed

AU - Bonello, Philip

AU - Russhard, P

PY - 2020/10/22

Y1 - 2020/10/22

N2 - 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 of the blade tip due to steady deflection and/or movements, 2) the change in effective stiffness due to rotation-induced inertia, which affects the BTT-stress calibration factors, 3) the assumption of constant speed over a single revolution that is made in most of BTT algorithms, which is not appropriate for rapid speed rates. This study shows the effect of such uncertainties on the vibration measurement and blade stress estimations.

AB - 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 of the blade tip due to steady deflection and/or movements, 2) the change in effective stiffness due to rotation-induced inertia, which affects the BTT-stress calibration factors, 3) the assumption of constant speed over a single revolution that is made in most of BTT algorithms, which is not appropriate for rapid speed rates. This study shows the effect of such uncertainties on the vibration measurement and blade stress estimations.

UR - https://www.research.manchester.ac.uk/portal/en/publications/uncertainties-in-the-calibration-process-of-blade-tip-timing-data-against-finite-element-model-predictions(77f37c1d-b4a4-42df-bc92-bbea6b78f273).html

U2 - 10.1201/9781003132639

DO - 10.1201/9781003132639

M3 - Conference contribution

SN - 9781003132639

BT - VIRM 12: Vibrations in Rotating Machinery conference

T2 - Vibrations in Rotating Machinery conference

Y2 - 14 October 2020 through 15 October 2020

ER -

Uncertainties in the calibration process of blade tip timing data against finite element model predictions

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