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

  • 제22권1호
  • /
  • Pages.74-80
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  • 2012
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  • 1598-2785(pISSN)
  • /
  • 2287-5476(eISSN)
한국소음진동공학회 (The Korean Society for Noise and Vibration Engineering)
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지반침하가 있는 저압 증기터빈의 진동저감

Vibration Reduction of a LP Steam Turbine having Support Subsidence

  • 투고 : 2011.11.10
  • 심사 : 2011.12.21
  • 발행 : 2012.01.20
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초록

The vibration of a LP turbine case may cause the failure of power generation and reduce the life of its facility. In this study we carried out on-site measurements of a LP turbine in order to find the cause of the vibration and conducted experimental and numerical modal analysis of the turbine case with its support frame. The measurement and the modal analysis show that the natural frequency of the turbine becomes close to 60 Hz due to the subsidence of the support. The elimination of the subsidence by shimming between the turbine and the support frame gave rise to the reduction of the vibration of the LP turbine case.

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참고문헌

  1. Forbes, G. L. and Randall, R. B., 2007, Simulated Gas Turbine Casing Response to Rotor Blade Pressure Excitation, Austranlasian Congress on Applied Mechanics 2007, Vol. 1, No. 2, pp. 223-228.
  2. Lee, W. K., Ko, W. S., Koo, K. Y. and Koo, J. Y., 2007, Analysis of High Vibration in Nuclear Turbine-generator, Proceedings of the KSNVE Annual Spring Conference, Vol. 2, No. 5, pp. 1024-1028.
  3. Ha, H. C. and Choi, S. P., 1999, Vibraion Characteristics of Steam Turbine due to the Rubbing, KSPSE, Vol. 3, No. 1, pp. 5-8.
  4. Cho, C. H., 1999, Vibration and Noise of Main Turbine Casing and Bearing, Korea Electric Power Research Institute.
  5. SAMCEF field, SAMTECH. 2011.
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  7. Rao, 2000, Vibration of Continuous System, pp. 466-469, WILEY.