Various vibrations occur while a ship is in operation. In the propulsion shaft systems of medium and small-sized vessels, it is common to install elastic couplings to prevent fluctuating torque from being directly transmitted to the reduction gear system and to avoid damage caused by torsional vibrations. However, the majority of elastic couplings are currently imported. The engine speed was gradually increased during the coupling test, while the vibrations were measured. At the point of maximum output, the engine speed was maintained at a constant level to observe the structural vibrations of the engine. This study aims to localize the production of elastic couplings by addressing the issue from the perspectives of torsional and structural vibrations to verify their operational performance.

Abstract
1. 서 론
2. 구조진동 및 비틀림 진동 측정 장비배치 및 방법
3. 구조진동 및 비틀림 진동 분석 결과
4. 결 론
References

• 송명호(Professor, Mokpo National Maritime University) | Myeongho Song
• 김선태(Professor, Korea Institute of Maritime and Fiseries Technology) | Suntae Kim
• 오승진(Professor, Mokpo National Maritime University) | Seungjin Oh Corresponding author