This paper is intended to be a history of the usage of the Jørgen Lund rotordynamic programs in the analysis of centrifugal compressors from the perspective of the author’s experience in that industry. Application of the Lund tilt pad bearing, rotor response, and stability programs will be described. They will be seen to be the basis for an industry wide acceptance criterion for the rotor dynamics of centrifugal compressors. They are used in the required audit reports for new compressors, and in trouble shooting investigations on the rotordynamics of centrifugal compressors.
Issue Section:Technical Papers
Keywords:machine bearings, physics computing, rotation, mechanical stability, compressors
Topics:Bearings, Compressors, Rotors, Stability, Eigenvalues
Spring and Damping Coefficients for the Tilting-Pad Journal Bearing,”
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Lund, J. W., and Orcutt, F. K., 1967, “Calculations and Experiments on the Unbalance Response of a Flexible Rotor,” ASME J. Eng. Ind., Nov., pp. 785–796.
Lund, J. W., 1974, “Stability and Damped Critical Speeds of a Flexible Rotor in Fluid-Film Bearings,” ASME J. Eng. Ind., May, pp. 509–517.
Badgley, R. H., 1972, “The Design and Usage of Liquid-Lubricated, Self-Acting Tilting-Pad Journal Bearings,” MTI-88tr21, Mechanical Technology Inc., (April 1968, supplements in Dec. 1968 and May 1972).
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Memmott, E. A., 1992, “Stability of Centrifugal Compressors by Applications of Tilt Pad Seals, Damper Bearings, and Shunt Holes,” IMechE, 5th International Conference on Vibrations in Rotating Machinery, Bath, pp. 99–106, September 7–10.
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Stiffness and Damping Coefficients for the Five-Pad Tilting-Pad Bearing,”
2), April, pp.
R. G., and
Evaluation of Pivot Stiffness for Typical Tilting-Pad Journal Bearing Designs,”
ASME J. Vib., Acoust., Stress, Reliab. Des.
110, April, pp.
Smalley, A. J., Almstead, L. G., Lund, J. W., and Koch, E. S., 1974, “User’s Manual—MTI Cadense Program CAD-25—Dynamic Stability of a Flexible Rotor,” Mechanical Technology Inc., February.
Lund, J. W., 1990, “Comments on Modal Analysis of Rotors,” Eleventh Machinery Dynamics Seminar, NRCC, Toronto, Canada, October, pp. 3–13.
Memmott, E. A., 2000, “The Lateral Stability Analysis of a Large Centrifugal Compressor in Propane Service at an LNG Plant,” IMechE, Proceedings of the 7th International Conference on Vibrations in Rotating Machinery, Nottingham, England, pp. 187–198, September 12–14.
Memmott, E. A., 2000, “Empirical Estimation of a Load Related Cross-Coupled Stiffness and The Lateral Stability Of Centrifugal Compressors,” CMVA, Proceedings of the 18th Machinery Dynamics Seminar, Halifax, pp. 9–20, April 26–28.
Memmott, E. A., 2002, “Lateral Rotordynamic Stability Criteria for Centrifugal Compressors,” CMVA, Proceedings of the 20th Machinery Dynamics Seminar, Quebec City, October 21–23.
Wachel, J. C., and von Nimitz, W. W., 1981, “Ensuring the Reliability of Offshore Gas Compressor Systems,” J. Pet. Technol., Nov., pp. 2252–2260.
Marshall, D. F., Hustak, J. F., and Memmott, E. A., 1993, “Elimination of Subsynchronous Vibration Problems in a Centrifugal Compressor by the Application of Damper Bearings, Tilting Pad Seals, and Shunt Holes,” NJIT-ASME-HI-STLE, Rotating Machinery Conference and Exposition, Somerset, New Jersey, November 10–12.
Stability and Damped Critical Speeds: How to Calculate and Interpret the Results,”
CAGI Technical Digest,
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