Abstract
In marine constructions, it is the most crucial to evaluate motions of working vessels, in order to ensure safety and improve construction accuracy. Assuming real situations in which a breakwater and another vessel exist around the working vessel, dynamic response analyses for multiple bodies were carried out.
The computed results showed that the motions of the working vessel might be larger than those obtained by the dynamic response analyses for the working vessel only. Therefore, under real situations in marine constructions, dynamic response analyses considering multiple bodies should be used.
Combining the results of the dynamic response analyses with NOWPHAS data, a new method to evaluate operating ratio was proposed.