Operational Modal Analysis of Rotating Machinery

Szymon Gres; Palle Andersen; Lars Damkilde

doi:10.1007/978-3-319-74693-7_7

Operational Modal Analysis of Rotating Machinery

Szymon Gres, Palle Andersen, Lars Damkilde

The Faculty of Engineering and Science

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

4 Citations (Scopus)

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Abstract

Harmonic excitation of structures caused by rotating equipment is a problem faced by many engineers in the field of Operational Modal Analysis (OMA). Several methods to discard the influence of harmonic inputs over systems natural responses has been proposed in the literature and implemented in various software solutions. This paper recalls some of the most used techniques and uses a new time domain method for removing harmonics from measurements. Deployed method does not rely on filtering, statistical detection nor on non-linear fitting. Instead, it predicts the harmonic part of the time series and deploys an orthogonal projection of the latter onto the raw measurements to remove the harmonic part of the signal. The new technique is a part of an semi-automated framework for OMA of structures contaminated with harmonics, whose flow is presented in this paper. The merit of the framework is discussed in the context of OMA of a full scale operating ship with rotating machinery on-board.

Original language	English
Title of host publication	Rotating Machinery, Vibro-Acoustics & Laser Vibrometry : Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018
Editors	Dario Di Maio
Number of pages	9
Volume	7
Publisher	Springer
Publication date	2019
Pages	67-75
ISBN (Print)	978-3-319-74692-0
ISBN (Electronic)	978-3-319-74693-7
DOIs	https://doi.org/10.1007/978-3-319-74693-7_7
Publication status	Published - 2019
Event	IMAC XXXVI, A Conference and Exposition on Structural Dynamics 2018 - Orlando, United States Duration: 12 Feb 2018 → 15 Feb 2018 Conference number: 36

Conference

Conference	IMAC XXXVI, A Conference and Exposition on Structural Dynamics 2018
Number	36
Country/Territory	United States
City	Orlando
Period	12/02/2018 → 15/02/2018

Series	Conference Proceedings of the Society for Experimental Mechanics Series
ISSN	2191-5644

Keywords

Operational modal analysis
Rotating machinery
Harmonic removal
Harmonic detection
Stochastic subspace identification

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10.1007/978-3-319-74693-7_7

Operational Modal Analysis of Rotating MachineryAccepted author manuscript, 1.53 MB

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Gres, Szymon ; Andersen, Palle ; Damkilde, Lars. / Operational Modal Analysis of Rotating Machinery. Rotating Machinery, Vibro-Acoustics & Laser Vibrometry: Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. editor / Dario Di Maio. Vol. 7 Springer, 2019. pp. 67-75 (Conference Proceedings of the Society for Experimental Mechanics Series).

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title = "Operational Modal Analysis of Rotating Machinery",

abstract = "Harmonic excitation of structures caused by rotating equipment is a problem faced by many engineers in the field of Operational Modal Analysis (OMA). Several methods to discard the influence of harmonic inputs over systems natural responses has been proposed in the literature and implemented in various software solutions. This paper recalls some of the most used techniques and uses a new time domain method for removing harmonics from measurements. Deployed method does not rely on filtering, statistical detection nor on non-linear fitting. Instead, it predicts the harmonic part of the time series and deploys an orthogonal projection of the latter onto the raw measurements to remove the harmonic part of the signal. The new technique is a part of an semi-automated framework for OMA of structures contaminated with harmonics, whose flow is presented in this paper. The merit of the framework is discussed in the context of OMA of a full scale operating ship with rotating machinery on-board.",

keywords = "Operational modal analysis, Rotating machinery, Harmonic removal, Harmonic detection, Stochastic subspace identification, Operational modal analysis, Rotating machinery, Harmonic removal, Harmonic detection, Stochastic subspace identification",

author = "Szymon Gres and Palle Andersen and Lars Damkilde",

year = "2019",

doi = "10.1007/978-3-319-74693-7_7",

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series = "Conference Proceedings of the Society for Experimental Mechanics Series",

pages = "67--75",

editor = "Maio, {Dario Di}",

booktitle = "Rotating Machinery, Vibro-Acoustics & Laser Vibrometry",

publisher = "Springer",

address = "Germany",

note = "IMAC XXXVI, A Conference and Exposition on Structural Dynamics 2018, IMAC XXXVI ; Conference date: 12-02-2018 Through 15-02-2018",

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Gres, S, Andersen, P & Damkilde, L 2019, Operational Modal Analysis of Rotating Machinery. in DD Maio (ed.), Rotating Machinery, Vibro-Acoustics & Laser Vibrometry: Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. vol. 7, Springer, Conference Proceedings of the Society for Experimental Mechanics Series, pp. 67-75, IMAC XXXVI, A Conference and Exposition on Structural Dynamics 2018, Orlando, Florida, United States, 12/02/2018. https://doi.org/10.1007/978-3-319-74693-7_7

Operational Modal Analysis of Rotating Machinery. / Gres, Szymon; Andersen, Palle; Damkilde, Lars.
Rotating Machinery, Vibro-Acoustics & Laser Vibrometry: Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. ed. / Dario Di Maio. Vol. 7 Springer, 2019. p. 67-75 (Conference Proceedings of the Society for Experimental Mechanics Series).

Research output: Contribution to book/anthology/report/conference proceeding › Article in proceeding › Research › peer-review

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AU - Andersen, Palle

AU - Damkilde, Lars

N1 - Conference code: 36

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N2 - Harmonic excitation of structures caused by rotating equipment is a problem faced by many engineers in the field of Operational Modal Analysis (OMA). Several methods to discard the influence of harmonic inputs over systems natural responses has been proposed in the literature and implemented in various software solutions. This paper recalls some of the most used techniques and uses a new time domain method for removing harmonics from measurements. Deployed method does not rely on filtering, statistical detection nor on non-linear fitting. Instead, it predicts the harmonic part of the time series and deploys an orthogonal projection of the latter onto the raw measurements to remove the harmonic part of the signal. The new technique is a part of an semi-automated framework for OMA of structures contaminated with harmonics, whose flow is presented in this paper. The merit of the framework is discussed in the context of OMA of a full scale operating ship with rotating machinery on-board.

AB - Harmonic excitation of structures caused by rotating equipment is a problem faced by many engineers in the field of Operational Modal Analysis (OMA). Several methods to discard the influence of harmonic inputs over systems natural responses has been proposed in the literature and implemented in various software solutions. This paper recalls some of the most used techniques and uses a new time domain method for removing harmonics from measurements. Deployed method does not rely on filtering, statistical detection nor on non-linear fitting. Instead, it predicts the harmonic part of the time series and deploys an orthogonal projection of the latter onto the raw measurements to remove the harmonic part of the signal. The new technique is a part of an semi-automated framework for OMA of structures contaminated with harmonics, whose flow is presented in this paper. The merit of the framework is discussed in the context of OMA of a full scale operating ship with rotating machinery on-board.

KW - Operational modal analysis

KW - Rotating machinery

KW - Harmonic removal

KW - Harmonic detection

KW - Stochastic subspace identification

KW - Operational modal analysis

KW - Rotating machinery

KW - Harmonic removal

KW - Harmonic detection

KW - Stochastic subspace identification

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VL - 7

T3 - Conference Proceedings of the Society for Experimental Mechanics Series

SP - 67

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BT - Rotating Machinery, Vibro-Acoustics & Laser Vibrometry

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PB - Springer

T2 - IMAC XXXVI, A Conference and Exposition on Structural Dynamics 2018

Y2 - 12 February 2018 through 15 February 2018

ER -

Gres S, Andersen P, Damkilde L. Operational Modal Analysis of Rotating Machinery. In Maio DD, editor, Rotating Machinery, Vibro-Acoustics & Laser Vibrometry: Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. Vol. 7. Springer. 2019. p. 67-75. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-319-74693-7_7

Operational Modal Analysis of Rotating Machinery

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