Ocean platform wave removal icebreaking structure

Abstract

The invention relates to an ocean platform wave removal icebreaking structure. The ocean platform wave removal icebreaking structure is characterized by comprising an upper cone ring, a middle cone ring and a lower cone ring, wherein the upper cone ring, the middle cone ring and the lower cone ring are sleeved on a pile leg of an ocean platform in sequence from top to bottom, the upper cone ring and the lower cone ring are respectively fixed with the pile leg in a welding mode, the inside of the middle cone ring is fixed with the pile leg in the welding mode through a plurality of supporting beams which are arranged in a spaced mode, the top of the middle cone ring is fixedly connected with the bottom of the upper cone body through a plurality of upper inclined angle prismatic bodies which are arranged in a spaced mode along the circumferential direction, the bottom of the middle cone ring is fixedly connected with the top of the lower cone ring through a plurality of lower inclined angle prismatic bodies which are arranged at intervals along the circumferential direction, an edge angle of each upper inclined angle prismatic body and an edge angle of each lower inclined angle prismatic body are both outside arranged, and the upper inclined angle prismatic bodies and the lower inclined angle prismatic bodies are symmetrical to the middle cone ring. The ocean platform wave removal icebreaking structure is low in manufacture and installation difficulty, can be widely applied in the process of ocean platform icebreaking, is particularly applicable to ocean platform structures which are large in diameters of pile legs, and are greatly influenced by wave load.

Description

technical field [0001] The invention relates to an ice-breaking structure for marine engineering facilities in ice areas, in particular to a wave-eliminating ice-breaking structure for an ocean platform installed on a pile leg of an ocean platform. Background technique [0002] In polar and subpolar oceans, the water surface freezes in winter. Sea ice drifts on the sea surface due to tides, currents and wind, and this drifting sea ice can have an impact on marine engineering structures. When the drifting sea ice acts on the structure of the offshore oil platform, the sea ice will be broken, and at the same time, it will exert a load on the offshore platform. In areas with severe sea ice, this sea ice load is the design control load of offshore oil platforms, which has a great impact on the structure of offshore platforms. In order to reduce the ice load acting on the offshore platform, the engineering community currently adopts the measure of adding ice breaking cones on t...

AI Technical Summary

Problems solved by technology

The problem brought by the ice-breaking cone is: due to the periodicity of ice breaking, this periodic breaking behavior will impose a certain periodic dynamic load on the ice-breaking cone. The period of this load is usually the same as that of the offshore platform. The natural period is close, which will easily lead to vibration of the offshore platform. Long-term vibration will cause adverse effects on the offshore platform, resulting in fatigue damage to the structure of the offshore platform, and because the position of the interaction between the legs and ice of the offshore platform is changed to a cone structure, resulting in ice and ice contact. The contact width of the offshore platform structure increases, and the maximum ice force increases accordingly

In addition, because the ice-breaking cone increases the position of the waterline surface of the offshore platform structure, the force of the wave acting on the pile legs is significantly increased, which is not conducive to the safety of the offshore platform structure.

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