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Fatigue Life Evaluation of Turbine Shaft Using Applied Shaft Stress

회전체 스트레스 정보를 이용한 터빈 축 피로수명 평가

  • Received : 2013.08.19
  • Accepted : 2013.11.05
  • Published : 2014.04.01

Abstract

The equipment or with a constant torque and a variable stress due to axial vibration such as the turbine-generator system in nuclear power plant show the fatigue fracture behavior. Thus this study whoul aim to measure the torsional stress and analyze the fatigue fracture behavior. To achieve this, we manufactured the equipment similar with turbine-generator system and applied various torsional vibration stress due to external load. In particular, the evaluation was conducted with the existing evaluation methods of the fatigue behavior of known stress-life, strain-life, crack growth assessment methods. With increasing the external load and independent methods tends to decrease the fatigue life was confirmed up to 10 times in 5 kV external load compared to without external load.

Keywords

Turbine Shaft Failure;Fatigue Life;Shaft Stress;Torsional Vibration;Stress-Life Curve;Crack Growth

Acknowledgement

Grant : 원전 터빈의 고신뢰 장주기 운전을 위한 감시 및 예측 진단 기술개발

Supported by : 한국수력원자력(주)

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