In this study, we proposed a method to measure and analyze the vibration problem in cargo pipes during the sea trial for 80K LPG vessel. Pipe vibration was identified as resonance with the propeller 1st order component, which is one of the main excitation forces in the normal continuous rating (NCR). In order to avoid resonance in the NCR, a reinforcement method was established through finite element method (FEM) analysis. In the future, the advance application of cargo pipe reinforcement is expected to be useful for reducing the vibration of the cargo pipes in ships whose order and specification are similar to those of the vessel used in this study.

• 이일오(현대삼호중공업) | Il-Oh Lee
• 유영훈(목포해양대학교) | Yu Young-Hun
• 송명호(목포해양대) | Myeongho Song Corresponding Author