Observation and Prediction of Instability due to RD Fluid Force in Rotating Machinery by Operational Modal Analysis
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Published
Sep 4, 2023
Daiki Goto
Tsuyoshi Inoue
Akira Heya
Shogo Kimura
Shinsaku Nakamura
Yusuke Watanabe
Abstract
In rotating machinery, rotordynamic (RD) fluid force is generated in fluid elements such as journal bearings, impellers, and seals. This RD fluid force is generated by the interaction of shaft vibration and fluid force and is difficult to predict because of nonlinearity. The RD fluid force has a significant effect on the stability of rotating machinery and is known to cause instability. In this study, we predicted the instability caused by RD fluid force by using operational modal analysis, which is a method to identify vibration characteristics based only on operating data.
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Keywords
Operational modal analysis, Rotating machinery, Vibration, Stability
References
Castro, G. & Zurita, G., (2022). Applications of Operational Modal Analysis in Gearbox and Induction Motor, Based on Random Decrement Technique and Enhanced Ibrahim Time Method. Journal of applied sciences, 2022,12,5284
Childs, D. W.(1978). The Space Shuttle Main Engine HighPressure Fuel Turbopump Rotordynamic Instability Problem. ASME J. Eng. Gas Turbines Power Vol.100 No.1: pp. 48-57. DOI: 10.1115/1.3446326.
Childs, D. W. (1983). Finite Length Solutions for RD Coefficents of Turblent Annular Seals. ASME Journal of Lubricatuion Technology Vol.105 pp437-445.
Childs, D. W. & Moyer, D. S. (1985). Vibration Characteristics of the HPOTP (High-Pressure Oxygen Turbopump) of the SSME (Space Shuttle Main Engine). ASME J. Eng. Gas Turbines Power Vol.107 No.1 : pp. 152-159. DOI: 10.1115/1.3239676.
Childs, D. W. (1993). Turbomachinery rotordynamics: phenomena, modeling, and analysis. John Wiley & Sons.
Chouksey, M., Dutt, J. K. & Modak, S.V. (2012). Modal analysis of rotor-shaft system under the influence of rotor-shaft material damping and fluid film forces. Mechanism and Machine Theory, 48:81-93
Gecgel, O., Dias, J. P., Osire, S. E., Alves, D.S., Macado, T. H., Daniel, G. B., Castro, H. F. & Cavalca, K. L. (2020). Simulation-Driven Deep Learning Approach for Wear Diagnostics in Hydrodynamic Journal Bearings. Journal of Tribology, August 2021, Vol. 143
Lund, J. W. (1974). Stability and Damped Critical Speeds of a Flexible Rotor in Fluid-Film Bearings. Journal of Engineering for Industry, 96(2): 509-517
Nagae, N., Watase, M. & Tamaki, T., (2011). Operational modal analysis using cross correlation function. Japan society of civil engineers, Journal of structural engineering,Vol.57A (in Japanese)
Nelson, C. C. (1984). Analysis for Leakage and Rotordynamic Coefficients of Surface-Roughened Tapered Annular Gas Seals. ASME Journal of Engineering for Gas Turbines and Power Vol.106(1984) pp927-934
Nelson, C. C. (1985).RD coefficients for Copmressible Flow in Tapered Annular Seals. ASME Journal of Tribology Vol.107 pp318-325
Santos, I. F. & Svendsen, P. K.,(2017). Noninvasive Parameter Identification in Rotordynamics Via Fluid Film Bearings- Linking Active Lubrication and Operational Modal Analysis. Journal of Engineering for Gas Turbines and Power, JUNE 2017, Vol. 139
Yang, B. S., Iwatsubo, T. & Kawai, R. (1984). A Study on the Dynamic Characteristics of Pump Seal: 1st Report, In case of Annular Seal with Eccentricity. Bulletin of the JSME Vol.27 No.227: pp. 1047-1057. DOI: 10.1299/jsme1958.27.1047
Childs, D. W.(1978). The Space Shuttle Main Engine HighPressure Fuel Turbopump Rotordynamic Instability Problem. ASME J. Eng. Gas Turbines Power Vol.100 No.1: pp. 48-57. DOI: 10.1115/1.3446326.
Childs, D. W. (1983). Finite Length Solutions for RD Coefficents of Turblent Annular Seals. ASME Journal of Lubricatuion Technology Vol.105 pp437-445.
Childs, D. W. & Moyer, D. S. (1985). Vibration Characteristics of the HPOTP (High-Pressure Oxygen Turbopump) of the SSME (Space Shuttle Main Engine). ASME J. Eng. Gas Turbines Power Vol.107 No.1 : pp. 152-159. DOI: 10.1115/1.3239676.
Childs, D. W. (1993). Turbomachinery rotordynamics: phenomena, modeling, and analysis. John Wiley & Sons.
Chouksey, M., Dutt, J. K. & Modak, S.V. (2012). Modal analysis of rotor-shaft system under the influence of rotor-shaft material damping and fluid film forces. Mechanism and Machine Theory, 48:81-93
Gecgel, O., Dias, J. P., Osire, S. E., Alves, D.S., Macado, T. H., Daniel, G. B., Castro, H. F. & Cavalca, K. L. (2020). Simulation-Driven Deep Learning Approach for Wear Diagnostics in Hydrodynamic Journal Bearings. Journal of Tribology, August 2021, Vol. 143
Lund, J. W. (1974). Stability and Damped Critical Speeds of a Flexible Rotor in Fluid-Film Bearings. Journal of Engineering for Industry, 96(2): 509-517
Nagae, N., Watase, M. & Tamaki, T., (2011). Operational modal analysis using cross correlation function. Japan society of civil engineers, Journal of structural engineering,Vol.57A (in Japanese)
Nelson, C. C. (1984). Analysis for Leakage and Rotordynamic Coefficients of Surface-Roughened Tapered Annular Gas Seals. ASME Journal of Engineering for Gas Turbines and Power Vol.106(1984) pp927-934
Nelson, C. C. (1985).RD coefficients for Copmressible Flow in Tapered Annular Seals. ASME Journal of Tribology Vol.107 pp318-325
Santos, I. F. & Svendsen, P. K.,(2017). Noninvasive Parameter Identification in Rotordynamics Via Fluid Film Bearings- Linking Active Lubrication and Operational Modal Analysis. Journal of Engineering for Gas Turbines and Power, JUNE 2017, Vol. 139
Yang, B. S., Iwatsubo, T. & Kawai, R. (1984). A Study on the Dynamic Characteristics of Pump Seal: 1st Report, In case of Annular Seal with Eccentricity. Bulletin of the JSME Vol.27 No.227: pp. 1047-1057. DOI: 10.1299/jsme1958.27.1047
Section
Regular Session Papers
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