基于多种桩型的海缆保护系统研究

Research on Several Subsea Cable Protection Systems Based on Different Foundations

[目的]为了对海缆保护系统的设计和性能提供较为可行的建议。[方法]分析了海缆保护系统各部件的力学性能、耐腐蚀性能、结构设计等,并研究了这些性能的合适范围,给出了计算模型。从风机基础、材料组成、微观结构、成本控制、失效原因等角度,并结合美国API标准及国内外研究,分析了J型管、I型管、单桩穿海缆三种主流形式及各部件如中心夹具、弯曲限制器、弯曲加强筋、固定装置等。[结果]研究结果表明:中心夹具的抗脱拉强度应大于35 kN,弯曲限制器材料的抗拉强度大于45 MPa。[结论]若部件的材料性能达标、结构设计合理、可减少不同部件在施工和服役期间的失效频率。所分析的设计和性能要求是较为合理有效的,可为海缆保护厂商的研发和实际生产提供合理建议。

[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.