Investigation on mooring system design of a deepwater semi-submersible platform

With the development of the offshore platform used in deeper and deeper waters,the design of mooring system is one of the key issues in the exploitation of platforms for deepwater.In this paper,the dynamic response analysis of mooring system is solved in time domain,and a basic design method of deepwater semi-submersible platform mooring systems is presented.Then the comparative analysis of the mooring system in the depth of 2 000m,which has 8 and 12 mooring lines to position is carried out.The results show that the platform motion responses and the mooring line tensions are effected to some extent by the different mooring scheme.