Security Posture Assessment Techniques for Marine Information

The structure of offshore platform is complex and the cost is too high. Once the platform has an accident, it will not only cause environmental pollution, but also bring about a series of problems such as economic losses and casualties, thus causing a bad impact on the society. Therefore, it is necessary to monitor the structure of offshore platform. Due to offshore platform structure has long been the bad service in the Marine environment, and suffered various effects, such as: the wind load, wave load, load current and ice etc., and even in some cases will be subjected to earthquake, typhoon, tsunami, etc and Marine platform itself also will be affected by the environment corrosion, Marine biological adhesion, water erosion, etc., these factors will be suffered damage to the Marine platform. Because the offshore platform has been in such a harsh environment or even the design and use of the platform is not appropriate, the platform structure will suffer damage, which will reduce the self-bearing capacity of the platform, and seriously will lead to platform failure. In this paper, the three-dimensional frame structure is applied to the offshore platform structure, and the damage situation of the offshore platform structure is analyzed, and a series of diagnostic methods are proposed. In this paper, the diagnosis method is mainly verified from three aspects: shear structure, three-dimensional frame structure and finite element model of offshore platform structure. In addition, the damage degree of the platform will be evaluated by modal parameter identification technology under the influence of certain noises.