Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Use of dynamic absorber for reduction of shaft vibration in diesel engines of ship

축계진동 저감을 위한 동흡진기의 제안

  • Park, Sok-Chu (Department of Naval Architecture and Ocean System Engineering, Korea Maritime and Ocean University) ;
  • Park, Kyung-Il (Khan off-shore co. ltd.) ;
  • Kim, Jeong-Ryul (Department of Marine System Engineering, Korea Maritime and Ocean University)
  • Received : 2016.03.03
  • Accepted : 2016.10.07
  • Published : 2016.11.30
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Abstract

Ship's diesel engines have intrinsic problem to make vibrations caused by cylinder explosion and unbalanced rotating mass. These vibrations might induce noises, are transferred to hull and neighboring structures and cause secondary vibrations. This paper suggests the use of an additional dynamic absorber with a sub-vibration system to reduce the aforementioned vibrations. This dynamic absorber is designed based on an analysis of the free vibration of the engine shafting system and the forced vibrations.

선박의 주기관으로 통상 사용되는 디젤기관은 터빈기관과 같은 회전기관과 달리 왕복동기관이기 때문에 실린더의 폭발력과 피스톤의 왕복관성력에 의한 불평형 관성력 및 관성모멘트, 실린더내의 주기적인 변동가스압력 등으로 인하여 본질적인 진동문제를 안고 있다. 이것은 엔진의 진동은 소음의 원인이 되고, 선체구조나 인접구조물에 전달되어 2차진동이 발생시키는 경우가 많다. 본 연구는 선박의 엔진과 축계의 자유진동해석과 엔진 폭발에 의한 강제진동해석을 하고, 나아가서 플라이휠에 부진동 장치인 동흡진기를 설치하여 진동을 줄이는 방법을 제안하고자 한다.

Keywords

References

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