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다국어 초록 (Multilingual Abstract)

A gas turbine consists of an upstream compressor and a downstream turbine with a combustion chamber, and also the compressor and the turbine are generally coupled using a single shaft. Large scale gas turbine compressor is designed as multi-stage axial flow and the blade is fantype which is thick and wide. Recently radial cracking happens occasionally at the compressor blade tip of large scale gas turbine. So, FEM was performed on the compressor blade and vibration modes and dynamic stresses were analyzed. According to the analysis, 9th natural frequency mode of the blade, which is 2 strip mode, is near the vane passing frequency by the vane located at the upstream of the blade.

참고문헌 (Reference)

1 Ewins,D.J, "Vibrational Modes of Mistuned Bladed Disks" 75-114, 1975

2 Scheibel, J, "Status on Compressor Blade Failure Investigation" 18-29, 2007

3 Gandy, D, "R0 Compressor Blade Failure Investigation" 15-, 2007

4 Gandy,D, "R0 Compressor Blade Failure Investigation" 94-, 2006

5 Hong, C, "Minimization of Harmonic Excitation of Nozzle Gagings" 1146-1156, 2001

6 Gandy, D, "Gas Turbine Compressor Dependability"

7 Schirle,S, "Compressor Update" 2-6, 2006

8 Cencula,J, "Compressor Update"