Planning and design method for polyester fiber tension type mooring system

Abstract

The invention relates to a planning and design method for a polyester fiber tension type mooring system. The method is characterized by comprising the following steps that 1, a polyester fiber cable and anchor chain of certain specification are selected as materials of segments of each cable in the mooring system, and the segmental structure of each cable in the mooring system is determined; 2, initial mooring system general arrangement of an offshore platform is given, and a return stiffness curve of the offshore platform in the horizontal offset direction is obtained according to the determined segmental structure of each cable; 3, inspection is conducted on the given initial mooring system general arrangement under the extreme environment according to the obtained return stiffness curve, and then mooring system general arrangement meeting the technical requirements is obtained. Accordingly, the workload that when the initial scheme is designed, multiple design parameters of the mooring system are subjected to trial calculation and adjustment repeatedly can be reduced, and the method can be widely applied to the field of deep-water marine engineering.

Description

technical field [0001] The invention relates to a planning and design method for a tensioned polyester fiber mooring system, which belongs to the field of deep-water marine engineering. Background technique [0002] As human exploration and development activities for offshore oil and gas gradually move towards deep water, positioning technology develops rapidly, and the original catenary mooring system is gradually replaced by the tension mooring system. The main advantages of the tension mooring system include positioning accuracy Lifting, material saving, smaller mooring system radius, pre-tension and reduction of equipment specifications and easy installation, etc. The materials of tension mooring system ropes include polyester fiber, high-strength polyethylene and nylon, among which polyester fiber material is the most used. When polyester fiber is used as the mooring material, the recovery force of the cable mainly comes from its axial deformation, and the cable itself...

AI Technical Summary

Problems solved by technology

However, the current design codes for various mooring system checks only provide the technical indicators that the mooring system should meet under the action of extreme environments, such as the maximum cable tension, the contact point position between the cable and the seabed, etc., but do not provide how to select Design parameters to make the mooring system meet the technical index requirements

Images