2024 Volume 80 Issue 18 Article ID: 24-18044
The effectiveness of flume-type anti-oscillation tanks against the motion of a floating caisson close to rubble mound and existing caissons during installation work was investigated from hydraulic experiments using regular and unidirectional irregular waves. The experiments on regular waves showed that the non-dimensional amplitude of the heave of the floating caisson decreased with an increase in the free water filled in the anti-oscillation tanks when the incident wave period was close to the natural period of the heave. The non-dimensional amplitude of the pitch was decreased by the presence of the free water in the anti-oscillation tanks regardless of the incident wave period. The non-dimensional amplitude of the roll was less affected by the free water in short wave conditions, while it could be increased by the presence of the free water in long wave conditions. Similar tendencies were observed in the experiments for unidirectional irregular waves. These results suggested the effectiveness of anti-oscillation tanks against the heave and pitch of a floating caisson during installation work.
