摘要: Introductory study into the problems of ship vibration. A short general review vibration is given. The reasons for discrepancies between calcualted and measured results are discussed related to parameters, modelling structure, numerical methods etc. To overcome difficulties caused by simplification parameters in computer programs extend present state knowledge this field, a qualitative analysis preformend. structure simulated simple two-parameter system. large mass represents hull small substructure. Different phenomena coupled substructure studied, including different damping stiffness substructures, application double step calculation method considered. In addition quantitative performned. few characteristics examples calculations using finite element chosen from commission reports Det Norske Veritas literature. coupling shaft, superstructure analysed. Phenomena free forced explained use obtained analysis. conclusion some suggestions given regarding further investigations
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