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

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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A Study on the Identifying Dynamic Characteristic Parameters of Rotor-bearing Systems Using Field Measurement Data of Unbalance Responses

현장 불평형 응답에 의한 로터-베어링 시스템 매개변수 규명에 관한 연구

  • 이동환 (한국기계연구원 구조연구부 회전체그룹) ;
  • 박노길 (부산대학교 기계공학) ;
  • 김영일 (한국기계연구원 구조연구부 회전체그) ;
  • 이형우 (부산대학교 기계기술연구소)
  • Published : 2004.08.01
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Abstract

Presented in this dissertation is a new method of identifying the critical speed of rotor-bearing systems without actually reaching at the critical speed itself. Using the method, it is possible to calculate the critical speed by measuring a series of rotor responses at much lower rotating speeds away from and without reaching at the critical speed of the system. In the course of the procedures illustrated, not only the critical speed but also the damping ratio and the eccentricity of the system can be identified at the same time. Test rotor was tested on the Rotor Dynamics Test Facility at the Korea Institute of Machinery ＆ Materials. Korea, and the theory has been confirmed experimentally. The method can be adopted to monitor changes of the dynamic characteristics of critical rotating machinery before and after overhauls, repairs, exchanges of various parts, or to detect trends or direction of subtle changes in the dynamic characteristic parameters over a long periods of time.

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References

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