Abstract
A system for automatic model-based monitoring of multiple coexistent errors is being developed. Within this publication, the unsteady bow curve of a test rig rotor is examined. For simulating this rotor, the bow model of the Jeffcott rotor is expanded to a MDOF rotor. The application of the Ritz approach enriched with problem-specific shape functions leads to an accurate simulation with low numerical effort. The bow model and the monitoring scheme are successfully tested. Bow, unbalance and roundness error can be identified separately during normal operation of the rotor.
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Notes
- 1.
Figure 3 shows only translational DOF. Rotational DOF can be included similarly.
- 2.
This greatly decreases the effort for taking the measurement without altering the monitoring too much. The presented procedure can be directly applied to measurements at further z positions for an identification of the full bow curve. Section 4.4 shows such an identification, yet without an automatic monitoring system.
- 3.
Consider that for a real signal, the coefficient \(\underline{c}_{k}\) is the conjugate complex of \(\underline{c}_{ - k}\).
References
Bachschmid N, Pennacchi P, Vania A (2002) Identification of multiple faults in rotor systems. J Sound Vib 254:327–366
Bremer H, Pfeiffer F (1992) Elastische Mehrkörpersysteme. Teubner Studienbücher, Stuttgart
Didier J, Sinou J-J, Faverjon B (2012) Study of the non-linear dynamic response of a rotor system with faults and uncertainties. J Sound Vib 331:671–703
Edwards S, Lees AW, Friswell MI (1998) Fault diagnosis of rotating machinery. Shock Vibr Dig 30:4–13
Edwards S, Lees AW, Friswell MI (2000) Experimental identification of excitation and support parameters of a flexible rotor-bearings-foundation system from a single run-down. J Sound Vib 232:963–992
Genta G (2005) Dynamics of rotating systems. Springer, NewYork
Ginzinger L, Sahinkaya MN, Heckmann B, Keogh P, Ulbrich H (2011) On the optimization problem of model-based monitoring. Sci China Technol Sci 54, 1095–1106
Heckmann B, Ginzinger L, Ulbrich H (2010) Model-based identification of unbalance and angular misalignment in a rotor system. In: Proceedings of the 13th international symposium on transport phenomena and dynamics of rotating machinery
IFToMM PC on Standardization of Terminology: Online Dictionary. http://www.iftomm.org/index.php?option=com_content&view=article&id=101&Itemid=196
Lees AW, Friswell MI (2006) Where next for condition monitoring of rotating machinery? Adv Vibr Eng 5:263–277
Rossner M, Heckmann B, Thuemmel T, Ulbrich H (2012) Model-based monitoring of rotor systems—identification of undamaged rotor and different failures. In: Proceedings of 14th international symposium on transport phenomena and dynamics of rotating machinery
Rossner M, Heckmann B, Thuemmel T, Ulbrich H (2013) Modellbasiertes Monitoring von Schlag und Unwucht am Rotor. In: 10. Internationale Tagung Schwingungen in rotierenden Maschinen
Rossner M, Thuemmel T, Ulbrich H (2014) Online roundness error identification and model-based monitoring for rotors. In: Proceedings of 10th international conference on vibration engineering and technology of machinery
Sherif K, Witteveen W, Holl H, Irschik H, Mayrhofer K (2013) Effiziente Simulation von Arbeitswalze und Stützwalze mit Berücksichtigung lokaler Effekte. In: 12. Internationale Tagung Schwingungen in rotierenden Maschinen
Ulbrich H (1986) Dynamik und Regelung von Rotorsystemen. VDI-Verlag, Düsseldorf
Acknowledgments
This research project is supported by the “Deutsche Forschungsgemeinschaft” under grant UL105/37-2.
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Rossner, M., Thuemmel, T., Ulbrich, H. (2015). Inclusion of Unsteady Bow in a Model-Based Monitoring System for Rotors. In: Pennacchi, P. (eds) Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-319-06590-8_132
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DOI: https://doi.org/10.1007/978-3-319-06590-8_132
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