The global hull modes of ships can be calculated by a simple beam model or a complex 3D FE models. Some decades ago the global hull modes and their calculation played a significant role for capacity growing container ships. What global ship hull vibrations do you consider significant and for what ship type?
Do you think is rather a historic matter or also a topic of future relevance and research and why?
Hello Rudi,
First coming in mind:
In cruise industry the topic stays significant with ever more innovative ways of overcoming required energy efficiency through lightweight structures & aparatus, whilst complying with increasingly challenging stability requirements. Thus even other than main engine, propulsion, wave and wind induced vibrations need to be closely followed.
..and in addition the guest comfort requirements target quasi onshore "feeling".
Hello, I am a captain lecturer and I have experiance on container ships. Container ships are different from others because of cargo operations. It can be loading and discharging at the same time. Sometimes some bays (longitudal loading area) remains emty or minimum loaded. That cause maximum longitudal stress. If calculations are wrong ship can ben broken in two parts. Soundings in ports are usually low. Navigating in shallow waters cause more vibration on ships. Ships longitudal stress combining vibration in shallow waters, this issue should be examined carefully.
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