상태공간 Newmark 기법을 이용한 로터-베어링 시스템의 충격응답 해석

Shock Response Analysis of Rotor-Bearing System using the State-Space Newmark Method

  • 이안성 (한국기계연구원 구조연구부 회전체그룹) ;
  • 김병옥 (한국기계연구원 구조연구부 회전체그룹) ;
  • 김영철 (한국기계연구원 구조연구부 회전체그룹) ;
  • 김영춘 (두산중공업(주) 기술연구원)
  • 발행 : 2004.11.01

초록

In this study was proposed a transient response analysis technique of a rotor system, applying the generalized FE modeling method of a rotor-bearing system considering a base-transferred shock force and together the state-space Newmark method of direct time integration scheme based on the average velocity concept. Experiments were performed to a test rig of a mock-up rotor-bearing system with series of half-sine shock waves imposed by an electromagnetic shaker, and quantitative error analyses between analytical and experimental results were carried out. The transient reponses of the rotor were sensitive to duration times and shape-qualities of the shock waves, and overally the analytical results agreed quite well with the experimental ones. Particularly, in cases that the frequencies, $1/(2{\times}duration\;time)$, of the shock waves were close to the critical speed of the rotor-bearing system, resonances occurred and the transient responses of the rotor were amplified.

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