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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Eigenvalue Analysis of a Coupled Tower-blade System Considering the Shear Forces of a Nacelle

너셀부 전단력을 고려한 타워-블레이드 연성계의 고유치 해석

  • 김민주 (경북대학교 대학원 기계공학부) ;
  • 강남철 (경북대학교 기계공학부)
  • Received : 2011.01.12
  • Accepted : 2011.04.26
  • Published : 2011.06.20
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Abstract

Eigenvalue analysis of a wind turbine system was investigated analytically. It is derived that the equations of motion of a tower and a blade are coupled by shear forces inter-connected by boundary conditions. The eigenvalues of the coupled system was calculated using Galerkin method and it is found that the system becomes unstable when the tower and blade modes are coalesced. Further, parameter studies for the eigenvalues were performed with respect to the rotating speed of a blade, nacelle mass, blade and tower densities.

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References

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