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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Vibration Characteristics of Critical Speed for Rotor Shaft

회전샤프트의 위험속도에 관한 진동특성 연구

  • Published : 2008.09.20
Download PDF
⟨ Previous Next ⟩

Abstract

In the design of a rotor shaft, care should be taken to minimize vibration by taking into account the sources of vibration. In addition, the intensity critical speed, stability, and other related aspects of the system must be considered. especially when it is operated at a critical speed, it is important to address issues related to vibration, as an increase in the whirling response of the rotor shaft can cause damage to the shaft, destruction of the rotor parts, and detrimental abrasions on the bearings. In this thesis, the vibration characteristics of a rotor shaft are investigated through the use of the finite element method. Variations of the diameters and lengths were used to determine the effect of a rotor shaft using Beam No.188(3D linear strain beam) in ANSYS version 11.0 as a universal interpretation program for finite elements. Special care was taken to prevent excessive vibration, which can result from resonance at the initial stage, in the formulation of a dynamic design for a rotor shaft through calculations while changing the diameters and the lengths of the shaft. Moreover, the dynamic characteristics of the critical speed, total mass, D/L(diameter to length) ratio, and natural frequency were verified. Furthermore, the rotor shaft applied by bearing element was calculated and compared by using Combi No. 214(2-D spring-damper bearing).

Keywords

References

  1. Kim, Y.-H. and Cho, D.-S., 2001, 'The Sensitivity Analysis of Coupled Axial and Torsional Undamped Free Vibration of Ship Propulsion Shafting', Journal of the Society of Naval Architects of Korea, Vol. 38, No. 4, pp. 48-55
  2. Kim, P.-Y., 1997, 'The Present Condition and Problem of Rotor Dynamics', Proceedings of the KSNVE Annual Autumn Conference, pp. 11-19
  3. Park, H.-K., Kim, D.-H., Kim, D.-M., Kim, Y.-S., Kim, M.-K. and Chen, S.-B., 2007, 'Threedimensional Rotordynamic Analysis Considering Bearing Support Effects', Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 17, No. 2, pp. 105-113 https://doi.org/10.5050/KSNVN.2007.17.2.105
  4. Yang, B.-S., 2006, 'Vibration of Rotor Machinery', INTERVISION
  5. Yang, B.-S., 2001, 'Low Vibration Design and Vibration Trouble Countermeasure of Rotor Machinery', Seminar of the Korean Society for Noise and Vibration Engineering
  6. FEM for CAE Engineer
  7. Lee, A.-S., Kim, Y.-C. and Park, J.-K., 1996, 'The Ultra-centrifuge Rotordynamics', Proceedings of the KSNVE Annual Autumn Conference, pp. 319-323
  8. Lee, J.-W., 1994, 'Introduction of Vibration Study for Rotor Dynamics', Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 4, No. 3, pp. 259-263
  9. Lee, H.-G., Kim, D.-E., Suh, H.-S., Han, H.-S., Jung, Y.-G. and Chung, C.-W., 2007, 'Dynamic Analysis of 2 MW Rotor for Wind Energy Conversion System', Proceeding of the Autumn Conference of Korea Wind Energy Association, pp. 170-173
  10. Jeon, H.-J. and Kim, C.-S., 1999, 'Marine Auxiliary Machinery', Hyo-sung Publishing Company
  11. TSE, INC. 'Analysis Dynamic', Training Manual
  12. KR, 1991, 'Control Manual of Vibration and Noise for Ship'
  13. API 610, 1995, 'Centrifugal Pumps for General Refinery Services', 8th Ed
  14. Fredric, F. E., 1992, 'Handbook of Rotordynamics', McGraw-Hill, Inc
  15. Lalanne, M. and Ferraris, G., 1990, 'Rotordynamics Prediction in Engineering', John Wiley & Sons Ltd., ISBN 0-471-92633-7
  16. Nelson, H. D. and McVaugh, J. M., 1976, 'Dynamics of Rotor-bearing Systems Using Finite Elements', ASME Journal of Engineering for Industry, Vol. 93, pp. 593-600
  17. Prohl, M. A., 1945, 'A General Method for Calcul ating Critical Speeds of Flexible Rotors', ASME Journal of Applied Mechanics, Vol. 67, pp. A-142-A-14
  18. Rankine, W. J. M., 1869, 'On the Centrifugal Force of Rotating Shafts', Engineer, XXVI, p. 249
  19. Thearle, E. I., 1934, 'Dynamic Balancing of Rotating Machinery in the Field', Trans. ASME, Vol. 56, pp. 745-753
  20. Wheeler, H. D., 1915, 'The Balancing of High-speed Machinery', Engineering, pp. 64-66

Cited by

  1. Design for Resonance Avoidance of Mount Through the Modal Analysis vol.25, pp.7, 2015, https://doi.org/10.5050/KSNVE.2015.25.7.481
  2. Theoretical and experimental analysis of the lateral vibration of shafting system using strain gauges in 50,000-DWT oil/chemical tankers vol.40, pp.4, 2016, https://doi.org/10.5916/jkosme.2016.40.4.301