Ultra-large semi-submersible floating type wind turbine foundation based on tuned mass dampers

Abstract

The invention provides an ultra-large semi-submersible floating type wind turbine foundation based on tuned mass dampers, and belongs to the technical field of offshore wind power. The foundation is characterized in that heaving stand columns are fixed to the bottom of a main stand column; an upper three-legged transition component is used for connecting a wind turbine and the main stand column; the heaving stand columns are connected through rectangular lower floating boxes with the same height as the heaving stand columns to form a regular triangle, and the whole floating type foundation does not need to be provided with rod piece structures such as cross braces, inclined braces and the like; each lower floating box is divided into an upper layer and a lower layer through a cabin partition plate, and a horizontal tuned mass damper device is arranged on the upper layer; and the heaving stand columns and the lower floating boxes serve as a heaving restraining mechanism to replace a heaving plate with the complex construction technology. The ultra-large semi-submersible floating type wind turbine foundation is suitable for the 7 MW grade or above ultra-large wind turbine with the water depth being 50 m or above, resonance between the wind turbine and the floating type foundation under the strong-wind and big-wave strong coupling sea condition can be effectively restrained, the operation stability of an ultra-large type semi-submersible floating type wind turbine system is improved, and fatigue damage of the wind turbine structure is reduced.

Description

technical field [0001] The invention relates to the technical field of offshore wind power, in particular to an ultra-large semi-submersible floating wind turbine foundation based on a tuned mass damper. Background technique [0002] At present, the large-scale wind turbines installed and applied in the sea are mainly 3-5MW, and shallow sea fixed foundations are generally used. With the development of offshore wind energy resources in shallow water areas, at the same time, deep sea wind energy resources have large reserves, high wind speed, stable wind conditions, and do not occupy Land and the advantages of no noise and visual pollution, therefore, it is an inevitable trend for the offshore wind power industry to go to the deep sea and far shore. However, when the water depth is greater than 50m, the cost of fixed foundations will rise sharply with the increase of seawater depth, and the use of floating foundations can significantly improve the technical and economic indica...

AI Technical Summary

Problems solved by technology

In addition, each cabin of the ballast water tank of the semi-submersible floating wind turbine foundation is relatively independent, so the movement of the ballast water is obviously limited. There will be a problem of insufficient vibration resistance. At the same time, the overweight rotor and cabin mass of the super-large floating wind turbine will further amplify the vibration effect, which greatly reduces the wind energy conversion efficiency and power output stability of the wind turbine. And it has a bad influence on the reliability of wind turbine system operation safety and structural fatigue damage

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