Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Forced Response Analyses of a Bladed Disk with Friction Dampers

마찰감쇠기가 있는 블레이드디스크의 강제진동해석

  • 유재한 (한국항공우주연구원 발사체미래기술팀) ;
  • 이인 (KAIST 항공우주공학과)
  • Received : 2010.08.19
  • Accepted : 2010.09.16
  • Published : 2010.10.30
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Abstract

To reduce the vibration levels, additional dissipation elements such as dry friction dampers are sometimes integrated into bladed disk assembly. In this study, forced response analysis systems for a tuned bladed disk with friction dampers were developed and verified. For the efficient nonlinear vibration analysis, multi-harmonic balanced method and cyclic boundary condition were used. Also, mode shapes obtained using fictitious mass method were used to describe the motion of the structures with the concentrated structural nonlinearity, friction damper. The relative convergence of fictitious mass and traditional unconstrained modes were compared.

블레이드 디스크에는 진동 저감을 위해 종종 마찰 감쇠기가 같은 부가적인 감쇠 요소가 부착된다. 마찰 감쇠기가 있는 블레이드 디스크의 강제 진동 해석 시스템이 개발 및 검증되었다. 비선형 진동 해석 방법인 다중 조화 방법과 주기 구조물의 효율적인 해석을 위한 주기 경계 조건이 사용되었으며 집중된 구조 비선형성인 마찰 감쇠기가 있는 구조물의 거동을 모사하기 위하여 가상 질량법으로 얻어진 모드 형상이 사용되었다. 이러한 모드와 일반적인 고유 모드의 상대적인 수렴성이 비교되었다.

Keywords

References

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