A Case Study on the Engine Body Vibration Characteristics of Generator Set consists of Engine-resilient-mounted, Generator-rigid-mounted and Flexible-coupling

탄성지지된 엔진, 고정지지된 발전기 및 탄성 커플링으로 구성된 발전기 세트의 엔진 본체 진동 특성에 관한 사례 연구

Recently the demand for natural gas as clean and safe energy due to concerns about global warming and interests in green ship is increasing. The dual fuel(DF) engine, one of environmentally friendly engines, is preferred for general merchant ships and power plants as well as LNG carriers. This is for the reasons of having higher efficiency and lower nitrogen and sulfur oxides emissions by operating on LNG fuel with a small amount of light fuel oil. In this study, the engine body vibration characteristics of 12V50DF in a generator set with engine-resilient-mounted, generator-rigid-mounted and flexible-coupling configuration are investigated through theoretical analysis and comprehensive vibration measurement. This analysis showed the dynamic behavior of engine excitation forces and seismic waves. And the suitable countermeasures for reducing vibration and safe operation are proposed.