Proceedings of the Korean Society for Noise and Vibration Engineering Conference (한국소음진동공학회:학술대회논문집)
- 2000.06a
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- Pages.664-669
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- 2000
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- 1598-2548(pISSN)
Study of Dynamic Characteristics of Angular Misalignment of High-pressure Turbine in 1000MW Nuclear Power Plant
축정렬 불량시 베어링 특성 변화에 따른 발전소 증기 터빈의 동특성 연구
- Sohn, Seok-Man (KEPRI) ;
- Lee, Jun-Shin (KEPRI) ;
- Yoo, Ki-Wan (KEPRI) ;
- Lee, Sun-Ki (KEPRI) ;
- Kim, Tae-Ryong (KEPRI)
- 손석만 (한국전력공사 전력연구원) ;
- 이준신 (한국전력공사 전력연구원) ;
- 유기완 (한국전력공사 전력연구원) ;
- 이선기 (한국전력공사 전력연구원) ;
- 김태룡 (한국전력공사 전력연구원)
- Published : 2000.06.22
Abstract
Angular misalignment is one of the important causes for shaft vibration of turbine-generator in 1000MW nuclear power plant. It may cause the plant unexpected shutdown and subsequent accident. The change of dynamic characteristics in journal bearing and rotor due to angular misalignment in high pressure turbine is analyzed. The stiffness/damping coefficients of journal bearing increase as angular misalignment. Subsequently the natural frequency of HP turbine is changed. It was found that the natural frequency may locate near 2 times operating frequency in case of severe misalignment.
Keywords