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고속 4행정 디젤엔진을 갖는 선박 추진시스템에서 토크변동에 의한 감속기어 안정성 평가
김인섭(InSeob Kim),윤현우(Hyunwoo Yoon),김준성(Junseong Kim),버광다오(QuangDao Vuong),이돈출(Donchool Lee) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
Maritime safety has been more critical recently due to the occurrence of shipboard accidents involving prime movers. As such, the propulsion shafting design and construction plays a vital role in the safe operation of the vessel other than focusing on being cost-efficient. Smaller vessels propulsion shafting system normally install high speed four-stroke diesel engine with reduction gear for propulsion efficiency. Due to higher cylinder combustion pressures, flexible couplings are employed to reduce the increased transmitted torque. In this paper, an actual vibration measurement and theoretical analysis was carried out on a propulsion shafting with V18.3L engine installed on small car-ferry and revealed higher torsional vibration resonance. Hence, a rubber-block type flexible coupling was installed to attenuate the transmitted vibratory torque. Considering the flexible coupling application factor, reduction gear stability due to torque variation was analyzed in accordance with IACS M56 and the results are presented herein.
2-기관-1-프로펠러 선박용 추진축계에서 클러치 탈부착에 기인한 탄성커플링의 동적 거동
벙광다오(QuangDao Vuong),윤현우,김준성(Junseong Kim),이돈출(Donchool Lee) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
Propulsion shafting systems having two or more prime movers connected in a single shaft for propulsion power have operating advantage compared with other propulsion shafting designs. This includes by being able to distribute power more efficiently and in cases of emergencies such as one prime mover breakdown, the vessel can still navigate safely. Taking into account installation space, this propulsion shafting system is primarily applied on special purpose vessels and in some motor craft. Flexible coupling are normally employed to dissipate unwanted resonances and shaft misalignment. As such, the flexible coupling dynamic behavior must be verified during operation to ensure function and reliability. In this paper, a flexible coupling model was applied on a fishery inspection vessel with a twin-engine single-propeller propulsion system to confirm its dynamic behavior and the results are presented herein.