Experimental Research on Hydroelasto-Buckling Response of Ship Model in Extreme Wave by Changing Wave Length

Extreme wave used to damage ship structures in the ocean by generating buckling midship due to huge wave height. On the one hand, it is very costly to recreate a real ship test for the study of extreme wave conditions. On the other hand, it is difficult to carry out tests on a common scale model in tank waves, because such waves are too small to damage the ship model. Thus far, no method of simulation has been proposed to study this problem because the dynamic ultimate strength of the ship involves strong coupling between the nonlinearity in the ship structure and waves. Therefore, a hydroelasto-buckling experimental method is proposed to study the dynamic ultimate strength of the ship and dynamic course of collapse of the structure in this paper, the effect of extreme wave length on hydroelasto-buckling response is focused analysis. Here, a hydroelasto-buckling ship model is first designed, and a test program is determined. A buckling hinge that can collapse under the load of the tank wave is used to connect two ship girders with a hinge joint. Then, a number of extreme tank waves are generated by changing their wave length to simulate an extreme ocean wave. The dynamic rotation angle, bottom water press and acceleration at midship are measured in the experiment. Importantly, the relationship between structural response and wave length is analyzed. The structural response involves encountering the rotation deformation induced by the wave load and whipping the rotation deformation induced by natural structural oscillations.