Four-stand-column semi-submersible offshore floating platform

Abstract

The invention discloses a four-stand-column semi-submersible offshore floating platform. The four-stand-column semi-submersible offshore floating platform comprises two box-type components and four stand columns. Each box-type component comprises a component body and four transversely-distributed arm-shaped pieces, wherein the four arm-shaped pieces are distributed around the component body in a surrounding mode. The adjacent arm-shaped pieces are perpendicular to each other. The two box-type components are distributed in the vertical direction. The bottom of each arm-shaped piece of the box-type component located on the upper portion is fixedly connected with the top of one stand column. The top of each arm-shaped piece of the box-type component located on the lower portion is fixedly connected with the bottom of one stand column. The structure form is simple, and large-scale batch construction is facilitated. The structure has stability redundancy, and the steel consumption of the structure can be reduced.

Description

technical field [0001] The invention relates to a four-column semi-submersible offshore floating platform. Background technique [0002] At present, with the continuous development and construction of offshore wind farms, there are fewer and fewer offshore (shore) high-quality wind resources and exploitable sea areas. In the far sea area far from the coast, wind resources are very rich and have very broad development prospects. However, as the distance from the shore increases, the water depth also gradually increases. When the water depth exceeds 50-60m, the cost and construction difficulty of the fixed wind turbine foundation fixed to the seabed widely used in offshore wind farms will increase significantly, and no longer have advantages . Therefore, the floating wind turbine foundation (platform) is bound to become an important research direction for future offshore wind power development. [0003] After decades of development, the design and manufacturing technology o...

AI Technical Summary

Problems solved by technology

[0009] (1) There is no redundancy in the stability of the existing three-column or four-column floating platform with intermediate columns, and damage to a single column may cause the platform to lose stability and be prone to overturning;

[0010] (2) The existing structural form, some of which adopt truss structure, has structural fatigue problems at the joints

Additional steel usage may be required;

[0011] (3) The bottom of the existing four-column floating platform adopts an annular buoyant tank structure, and the up and down shaking of the water body in the annular area may aggravate the vertical movement of the platform. In addition, the amount of steel used will increase to a certain extent

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