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Online Input and State Estimation in Structural Dynamics Read chapter Read first chapter

2016 | OriginalPaper | Chapter

7. Modal Parameters of Multiple-Disk Shaft System from Multiple Reference Impact Test

Authors : Naim Khader, Mohammad Ramadan

Published in: Special Topics in Structural Dynamics, Volume 6

Publisher: Springer International Publishing

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Abstract

The proposed work is intended for Experimental Modal Analysis (EMA) of a multi-disk shaft system to estimate its modal parameters, i.e., natural frequencies, damping ratios, and mode shapes. The considered system is excited by a roving impact hammer at a set of excitation points, and the vibration response is measured at a number of response points (taken as reference points) using piezoelectric accelerometers. The Frequency Response Function (FRF) matrix and the corresponding Impulse Response Function (IRF) matrix are estimated, which allows the detection and estimation of repeated or closely coupled modes, known to exist in the considered structure. The estimated FRF and IRF matrices are employed with both time and frequency domain algorithms to estimate the desired modal parameters. Modal frequencies are estimated from Finite Element analysis using ANSYS and compared with the experimentally obtained frequencies.

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previous chapter An Adaptive Markov Chain Monte Carlo Method for Bayesian Finite Element Model Updating
next chapter Identification of Aerodynamic Properties of Bridge Decks in Arbitrary Motion
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Metadata
Title
Modal Parameters of Multiple-Disk Shaft System from Multiple Reference Impact Test
Authors
Naim Khader
Mohammad Ramadan
Copyright Year
2016
Book
Special Topics in Structural Dynamics, Volume 6

Print ISBN: 978-3-319-29909-9

Electronic ISBN: 978-3-319-29910-5

Copyright Year: 2016

DOI
https://doi.org/10.1007/978-3-319-29910-5_7

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