This paper studies how temperature variations affect natural frequencies of rocking vibration of a rotating disk and spindle system through mathematical modeling and experimental measurements. Existing literature has shown that both radial bearing stiffness and natural frequency of one-nodal-diameter disk modes could substantially affect natural frequencies of rocking vibration. In this paper, a preliminary experiment first identifies that relaxation of bearing stiffness is the dominating factor to shift the natural frequency at elevated temperatures. In addition, the bearing relaxation primarily results from thermal mismatch between the bearing raceways and the rotating hub. Guided by the experimental results, a mathematical model is developed to determine how temperature variations affect bearing contact angles, bearing preloads, and subsequently the radial bearing stiffness Based on the bearing stiffness and disk frequency at elevated temperatures, one can predict natural frequency of rocking vibration through the mathematical model by Shen and Ku (1997). Finally, of a rotating disk and spindle system are measured in a thermal chamber to validate the theoretical predictions.
Effects of Elevated Temperatures on Rocking Vibration of Rotating Disk and Spindle Systems
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division January 17, 2001; revised manuscript received August 15, 2001. Associate Editor: J. L. Streator.
Tseng , C., Shen, J., Ku, C. R., and Shen, I. Y. (September 24, 2002). "Effects of Elevated Temperatures on Rocking Vibration of Rotating Disk and Spindle Systems ." ASME. J. Tribol. October 2002; 124(4): 794–800. https://doi.org/10.1115/1.1456456
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