Research on Several Subsea Cable Protection Systems Based on Different Foundations

Abstract

[Introduction] In order to provide some feasible references for the designs and properties of subsea cable protection systems. [Method] This paper analyzed the mechanical properties, corrosion resistance and structural design of various components of subsea cable protection systems, and proposed the appropriate range of these values by calculations and models. Three mainstream forms of subsea cable protection systems and their components like centralizer, bending restrictor, bending stiffener and fixing device were analyzed from the perspectives of offshore foundations, material compositions, microstructures, cost control, and failure reasons, which also combined with American API standards and global researches. [Result] The results of the study show that the pulling resistance of the centralizer should be greater than 35 kN, and the tensile strength of the material for bend restrictors should be greater than 45 MPa. [Conclusion] If the material properties and structural designs of the components meet these references, the failure frequency of these components can be reduced during installation and service. This paper suggests that the references for designs and properties are feasible, which can provide reasonable suggestions for research and production of submarine cable protection manufacturers.

Keywords

• offshore wind
• subsea cable protection system
• i/j-tube seals
• bend restrictors
• bend stiffeners