Abstract
Nowadays the hydroelastic responses of very large floating structures have been predictable for regular waves. From viewpoint of practical use, the study on responses to irregular waves, arbitrary external loads and actual sea loads including validations by model experiments becomes indispensable. Furthermore, the reduction of response using certain adequate control devices to meet the motion criterion is also needed. Therefore, the development of a precise and practical numerical simulation method in time domain, and investigations through model experiments should be done further.
In this study, the experimental results of hydroelastic response and attitude control by using newly improved pneumatic pressure type actuators in long crested head regular and irregular waves are shown. Numerical simulations in time domain are performed and the results are compared with the experiments. The calculation results agree with experiments generally well for both regular and irregular waves in control and no control conditions. Moreover, the results of active control indicate that it is possible to suppress the deflection of a very large floating structure by using air actuator for waves of various frequencies.
