Study on Methods of Restraining the Heave Amplitude of The Semi-submersible Platform

Two kinds of solution to restrain the heave amplitude were put forward.Without considering the mooring force,on the basis of discussing the theoretical relationship between the draft and the heave amplitude,a numerical calculation with the Sesam/HydroD was made and the effect of the draft to the heave amplitude was obtained.With the mooring force,added mass block on the mooring line was taken to restrain the heave amplitude,and a time domain analysis was made with the Sesam/DeepC,to obtained the rule between the quality of the mass block and the heave amplitude.The results showed that these two methods are effective to restrain the heave amplitude.