Abstract
Challenging applications, such as re-injection of natural gas and carbon dioxide for the oil and gas upstream market, continue to push centrifugal compressor original equipment manufacturers (OEM) to the edge of their experience working with ultra-high density fluids. Given the uncertainties associated with the machinery design with regards to rotor stability, an increasing number of end-users are requiring stability verification tests to validate the rotordynamic models to reduce the risk of rotor instability issues during operation, as well as the risk of critical speeds with low damping inside the operational speed range at full or partial load conditions. The method of choice for stability tests has been the experimental modal analysis (EMA) techniques. These techniques generally require the temporary installation of an electromagnetic shaker on the compressor’s non-drive end (NDE) to non-synchronously excite the mode(s) of interest. While such EMA techniques have advantages for verification testing, the need for an external exciter does create additional costs and complications that must be managed. A possible alternative to these traditional EMA techniques is to adopt operational modal analysis (OMA) methods, where no external device is needed and the excitation comes solely from the ambient. The use of a OMA technique in a very low density gas (hydrogen) is the focus of this present work, in order to demonstrate the limitation, advantages and applicability of the proposed method.
Keywords
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Kocur, J.A., Nicholas, J.C., Lee, C.C.: Surveying tilting pad journal bearings and gas labyrinth seal coefficients and their effect on rotor stability. In: Proceedings of the Thirty-Sixth Turbomachinery Symposium, pp. 1–10. Texas A&M University (2007)
Kocur, J.A., Cloud, C.H.: Shop rotordynamic testing—options, objectives, benefits and practices. In: Proceedings of the Asia Turbomachinery & Pump Symposium, Singapore. Texas A&M University, February 2016
Brincker, R., Ventura, C.: Introduction to Operational Modal Analysis. Wiley, Hoboken (2015)
Pettinato, B.C., Cloud, C.H., Campos, R.S.: Shop acceptance testing of compressor rotordynamic stability and theoretical correlation. In: Proceedings of the Thirty-Ninth Turbomachinery Symposium, pp. 31–42. Texas A&M University, Houston, Texas, October 2010
Kanki, H., Fujii, H., Hizume, A., Ichimura, T., Yamamoto, T.: Solving nonsynchronous vibration problems of large rotating machineries by exciting test in actual operating condition. In: The International Conference on Rotordynamics, IFToMM, pp. 221–225 (1986)
Kumaresan, R., Tufts, D.W.: Estimating the parameters of exponentially damped sinusoids and pole-zero modeling in noise. IEEE Trans. Acoust. Speech Sig. Process. ASSP-30(6), 833–840 (1982)
Hung, C.F., Ko, W.J.: Identification of modal parameters from measured output data using vector backward autoregressive model. J. Sound Vibr. 256(2), 249–270 (2002)
Cloud, C.H., Maslen, E.H., Barrett, L.E.: Damping ratio estimation techniques for rotordynamic stability measurements. ASME J. Eng. Gas Turbines Power 131(1), 012504–1–11 (2009)
Carden, E.P., Sehlstedt, N., Nielsen, K.K., Lundholm, S., Morosi, S.: Stability analysis and assessment of rotor trains using operational modal analysis. In: Proceeding of the Ninth International Conference on Rotor Dynamics, IFToMM, pp. 2083–2093. Springer, Heidelberg (2014)
Guglielmo, A., Mitaritonna, N., Catanzaro, M., Libraschi, M.: Full load stability test (FLST) on LNG compressor. In: Proceedings of ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. Number GT2014–25353, ASME, July 2014
Baldassarre, L., Guglielmo, A., Catanzaro, M., Zague, L., Silva, R.T., Ishimoto, L., Miranda, M.A.: Operational modal analysis application for the measure of logarithmic decrement in centrifugal compressor. In: Proceedings of the Forty-Fourth Turbomachinery and Thirty-First Pump Symposia. Texas A&M University, Houston, Texas, September 2015
van Overschee, P., de Moor, B.L.: Subspace Identification for Linear Systems: Theory—Implementation—Applications. Springer Science & Business Media, Heidelberg (2012)
James, G.H., Carne, T.G., Lauffer, J.P.: The natural excitation technique (NExT) for modal parameter extraction from operating structures. Modal Anal. Int. J. Anal. Exp. Modal Anal. 10(4), 260 (1995)
Acknowledgements
The authors would like to thank José A. Vázquez of BRG and Leonardo Ishimoto of Petrobras, who provided valuable support during this investigation.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this paper
Cite this paper
Zague, L.O., Cloud, C.H., Miranda, M.A., Campos, R.S. (2019). Operational Modal Analysis of a Centrifugal Compressor in Field Operation. In: Cavalca, K., Weber, H. (eds) Proceedings of the 10th International Conference on Rotor Dynamics – IFToMM . IFToMM 2018. Mechanisms and Machine Science, vol 61. Springer, Cham. https://doi.org/10.1007/978-3-319-99268-6_32
Download citation
DOI: https://doi.org/10.1007/978-3-319-99268-6_32
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-99267-9
Online ISBN: 978-3-319-99268-6
eBook Packages: EngineeringEngineering (R0)