Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Reduction of Vibration for an Elastic Structure by means of a Relocation of Part

구조 재배치를 이용한 탄성체 진동 저감

  • Kim, Giman (Department of Mechanical System Engineering, Kumoh National Institute of Technology) ;
  • Choi, Seongdae (Department of Mechanical System Engineering, Kumoh National Institute of Technology)
  • 김기만 (국립금오공과대학교 기계시스템공학과) ;
  • 최성대 (국립금오공과대학교 기계시스템공학과)
  • Received : 2020.05.14
  • Accepted : 2020.06.19
  • Published : 2020.07.31
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Abstract

This study deals with the passive control of the dynamic characteristics of a theoretical model which is a string with fixed ends and loaded by two point masses - a main mass (Mo) and a secondary mass (Ms). It has been controlled passively by means of a relocation of a secondary mass. A main mass placed on the string is considered as a vibrating receiver which be forced to vibrate by a vibrating source being positioned on the string. By analyzing the motion of a string, the equation of motion for a string was derived by using a method of variation of parameters. To define the optimal conditions for the vibration reduction, the governing equation, which denotes the dynamic response of a string was derived in the closed form and then evaluated numerically. The possibility of reduction of an amplitude and a power being transmitted to a main mass were found to depend on the location and the magnitude of a secondary mass as well as the range of a forcing frequency.

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References

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