A study on the ship vibration characteristics with phase effect using the structural intensity analysis

摘要

The structural intensity analysis calculates vibration energy flow from vibratory velocity and internal forces of structures, and it can give some information about source power, dominant transmission path and dissipation of vibration energy. In this study, the structural intensity analysis for vessel with multi-excitation source considering phase effect is carried out. The purpose of this study is to investigate how to affect on the vibratory response of superstructure by changing the phase between the excitation sources of main engine. From the various numerical studies considering phase effect, it is confirmed that the dominant transmission path of vibration energy from the excitation sources to the superstructure is clarified. Furthermore, the adequate structural modification with phase effect is one of the most effective methods in changing the vibration response of the superstructure.