Box-type lower floating body multi-stand-column-type semi-submersible platform

Abstract

The invention relates to a box-type lower floating body multi-stand-column-type semi-submersible platform. The box-type lower floating body multi-stand-column-type semi-submersible platform comprises a lower floating body. The upper portion of the lower floating body is connected to an upper platform through multiple stand columns. The lower floating body is parallel to the upper platform. The lower surface of the upper platform is parallel to the water surface. The upper surface of the upper platform is provided with a superstructure. A helicopter take-off and landing area is arranged on a deck located on the upper platform. An anchoring system is arranged on the platform. The box-type lower floating body multi-stand-column-type semi-submersible platform is compact and reasonable in structure, convenient to manufacture and install, suitable for deep and far sea environment, and applicable to the large size due to the facts that the lower floating body box-type through and multi-stand-column-type semi-submersible platform is adopted, and the lower floating body is a box-type body and is connected with the upper platform through the stand columns.

Description

technical field [0001] The invention relates to the technical field of marine platform design, in particular to a reconfigurable ultra-large box-type lower floating body multi-column semi-submersible platform suitable for deep seas, outlying island seaports, outlying island airports and seas. Background technique [0002] The semi-submersible platforms in the prior art all adopt the underwater floating body as a caisson type or as a lower body type. In the caisson style, several columns are arranged on the same circumference, and a lower body is set under each column; in the lower body style, two torpedo-shaped lower bodies are arranged on the left and right, and the number of columns on each lower body can be 2 to 4. Since the lower floating body of the semi-submersible platform is submerged in water, the amplitudes of its roll and pitch are very small, but its heave motion is relatively large. [0003] Existing semi-submersible platforms tend to develop towards deep sea a...

AI Technical Summary

Problems solved by technology

Since the lower floating body of the semi-submersible platform is submerged in water, the amplitude of its rolling and pitching is very small, but its heaving motion is relatively large.

[0003] Existing semi-submersible platforms tend to develop towards deep sea and diversify their functions. In order to meet the rich function expansion and resist the harsh wind and wave conditions in deep and open seas, it is necessary to increase the size. Once the main scale of the platform is too large, reaching hundreds of meters , increasing the distance between the columns will seriously weaken the structural bearing capacity of the entire platform. If the cross-sectional size of the columns or the number of columns are increased to improve the structural strength, in addition to consuming more materials and funds, not only the increased area of ​​the columns will suffer More severe wave loads, and the increased waterplane will reduce its seakeeping performance in waves, which will ultimately affect the performance of the platform

In addition, due to the randomness of the wind direction and the uncertainty of the waves in the ocean, the wave force on the column surface is not uniform. Once a column fails due to fatigue or is damaged due to accidental instability, it will cause immeasurable losses.

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