한국소음진동공학회논문집 (Transactions of the Korean Society for Noise and Vibration Engineering)

  • 제18권1호
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  • Pages.35-46
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  • 2008
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  • 1598-2785(pISSN)
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  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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균열회전체의 고조파진동 해석

Analysis of Harmonic Vibration of Cracked Rotor

  • 전오성 (전주대학교 기계자동차공학과)
  • 발행 : 2008.01.20
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초록

Harmonic vibration characteristics for the general rotor model having a breathing crack are analyzed. Analyses are performed at the half critical speed ranges. The vibration characteristics are explained by using the additional slope and bending moment at the crack position and the influence coefficient showing the structural dynamic characteristics of the rotor. With the low crack depth the magnitude of the additional slope is kept constant even at the speed range at which the orbit magnitude is very sensitive to the rotational speed change. At this speed range the vibration is affected by the influence coefficient only. As the dynamic bending moment exceeds the static bending moment with the increase of crack depth. the additional slope affects the vibration amplitude of cracked rotor and the crack propagation rate increases.

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참고문헌

  1. Gasch, R., 1976, 'Dynamic Behaviour of a Simple Rotor with a Cross-sectional Crack', Vibration in Rotating Machinery, Institution of Mechanical Engineers, London, pp. 123-128
  2. Mayes, I. W. and Davies, W. G. R., 1980, 'A Method of Calculating the Vibrational Behaviour of Coupled Rotating Shafts Containing a Transverse Crack', Vibration in Rotating Machinery, Institution of Mechanical Engineers, London, pp. 17-27
  3. Darpe, A. K., Gupta, K. and Chawla, A., 2002, 'Analysis of the Response of a Cracked Jeffcott Rotor to Axial Excitation', Journal of Sound and Vibration, Vol. 249, pp. 429-445 https://doi.org/10.1006/jsvi.2001.3870
  4. Choi, S.-H., Hong, S.-W. and Lee, C.-W., 2003, 'An Efficient Dynamic Model of General Rotor Systems with Open Cracks,' Proceedings of the KSNVE Annual Spring Conference, pp. 88-93
  5. Keiner, H. and Gadala, M. S., 2002, 'Comparison of Different Modeling Techniques to Simulate the Vibration of a Cracked Rotor', Journal of Sound and Vibration, Vol. 254, pp. 1012-1024 https://doi.org/10.1006/jsvi.2001.4106
  6. Jun, O. S., 2004, 'Influence Coefficients on Rotor Having Thick Shaft Elements and Resilient Bearings', Journal of Sound and Vibration, Vol. 272, pp. 657-673 https://doi.org/10.1016/S0022-460X(03)00393-6
  7. Jun, O. S., 2005, 'Vibration Analysis of Flexible Rotor Having a Breathing Crack', Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 15, No. 10, pp. 1137-1147 https://doi.org/10.5050/KSNVN.2005.15.10.1137
  8. Jun, O. S. and Gadala, M. S., 2008, 'Dynamic Behavior Analysis of Cracked Rotor', Journal of Sound and Vibration, Vol. 309, pp. 210-245 https://doi.org/10.1016/j.jsv.2007.06.065
  9. Tada, H., Paris, P. C. and Irwin, G. R., 2000, The Stress Analysis of Cracks Handbook, 3rd ed., ASME Press
  10. Lee, C.-W., 1993, Vibration Analysis of Rotors, Kluwer Academic Publishers, The Netherlands, Ch. 8