CN104790426A - Semi-submersible type offshore wind power foundation structure - Google Patents
Semi-submersible type offshore wind power foundation structure Download PDFInfo
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- CN104790426A CN104790426A CN201510229649.5A CN201510229649A CN104790426A CN 104790426 A CN104790426 A CN 104790426A CN 201510229649 A CN201510229649 A CN 201510229649A CN 104790426 A CN104790426 A CN 104790426A
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- ballast tank
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
- B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels
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Abstract
The invention discloses a semi-submersible type offshore wind power foundation structure. The semi-submersible type offshore wind power foundation structure comprises a ballast tank, multiple stand columns are perpendicularly arranged on the edge of the ballast tank, a center stand column is perpendicularly arranged in the center of the ballast tank, the stand columns are symmetrically distributed on the edge of the ballast tank, and the stand columns and the center stand column are arranged on the same plane of the ballast tank. Each stand column is connected with the center stand column through a water surface floating box. The disc-type ballast tank has the effects of improving the symmetry of hydrodynamic performance of the structure, lowering the gravity center of the structure and increasing heave damping of the structure. The water surface floating boxes have the effect of lifting the buoyancy center; the buoyancy center is lifted, the gravity center is lowered, in this way, the stability of the floating structure can be greatly improved, and the symmetry and the heave damping of the structure can greatly improve the hydrodynamic performance of the structure.
Description
Technical field
The present invention relates to a kind of semi-submersible type offshore wind power foundation structure.
Background technology
Oversea wind wind-powered electricity generation is green clean and regenerative resource, therefore, is subject to the great attention of countries in the world, the mode encourage growth offshore wind farm industry that national governments all adopt electricity price to subsidize.China then promotes the development of offshore wind farm industry especially further by the means of Policy Adjustment, therefore, national maritime provinces has planned offshore wind farms one after another.Because marine wind electric field can produce certain impact to the marine eco-environment, national governments have started the exploitation limiting offshore wind farms, and push offshore wind farm industry to deep water (50m).This means the developing direction that floating-type offshore wind power foundation structure will be the exploitation of following marine wind electric field.At present, floating wind power foundation structure mainly comes from the concept of floating marine oil platform---Spar, TLP and semi-submersible type.But the stressed and ocean platform of offshore wind power foundation structure has larger difference---wind load is far longer than wave and flows load, and the application point of wind load is higher, larger moment loading is produced to foundation structure, thus cause that floating structure is significantly longitudinal and transverse shakes motion, and vertical rolling motion will change the aerodynamic effects of blade, reduce the wind energy conversion efficiency of wind turbine.
After the depth of water is greater than 50m, economical offshore wind power foundation structure is floating structure, current floating structure mainly contains three kinds of forms---Spar, TLP and semi-submersible type, wherein the drinking water of Spar and TLP is larger, therefore, be suitable for and develop compared with the marine wind electric field of deep water, and the drinking water of semi-submersible type is more shallow, the depth of water scope be suitable for is larger.But because the wind load moment of blower fan is comparatively large, cause the longitudinal and transverse of semi-submersible structure to shake motion amplitude comparatively greatly, thus reduce the wind energy conversion efficiency of wind energy conversion system, make the hydrodynamic performance of semi-submersible structure far away from Spar and TLP, application is restricted.
Current semi-submersible type offshore wind power foundation structure adopts triangular structure, and as shown in Figure 1, three columns are connected on star or triangle buoyancy tank, and the first half of buoyancy tank is buoyancy compartment, and the latter half is ballast tank, also comprises circular abutment in two schemes.Such scheme not only causes the asymmetric (when structure is subject to the wind load of different directions of structure, its exercise performance has larger difference, thus change the generating efficiency of blower fan), meanwhile, the bottom buoyancy tank of existing structure makes the centre of buoyancy of structure lower, and towering blower fan quality makes the structural focus of offshore wind turbine higher, this reduces the stability of system, the hydrodynamic performance of structure is deteriorated, thus produces larger motor imagination, reduce the efficiency of wind-power electricity generation.
In a word, the shortcoming of prior art:
1, buoyancy tank is asymmetric, causes the structure motion under different directions wind (wave) load action different, thus makes the wind energy conversion efficiency of blower fan when different wind direction different, larger to the influence of fluctuations of electrical network.
2, centre of buoyancy is lower, and center of gravity is higher, and the hydrodynamic performance of structure is poor.
Summary of the invention
For solving the deficiency that prior art exists, the invention discloses and the present invention proposes a kind of symmetry and the good floating-type offshore wind power foundation structure of hydrodynamic performance, in the advantage keeping its drinking water more shallow simultaneously, by lowering the center of gravity and improving the hydrodynamic performance that two, centre of buoyancy major measure improves it.
For achieving the above object, concrete scheme of the present invention is as follows:
A kind of semi-submersible type offshore wind power foundation structure, comprise ballast tank, the edge-perpendicular of described ballast tank is provided with multiple column, the central vertical of ballast tank is provided with center stand column, described multiple column is symmetrically distributed in the edge of ballast tank, multiple column and center stand column are all arranged in the same plane of ballast tank, and each column is all connected with center stand column by surface caisson.
Ballast tank in described multiple column between adjacent two columns is provided with multiple circular hole.
Also be provided with the strut of playing a supporting role between described each column and center stand column, described strut is symmetrically distributed in top and the below of surface caisson.
Described ballast tank is disc ballast tank.
Described column is cylindrical column.
The number of described circular hole is three.
The number of described column is three, and three columns are arranged symmetrically on ballast tank.
Described multiple column is the column that structure is identical.
The ballast tank of the application adopts disc ballast tank, because: if adopt square ballast tank, then should adopt four columns, namely square each angle is arranged a column, if adopt three columns, then square ballast tank necessarily has two angles unsettled, easily produces flexural vibrations.
The cylindrical column of the application, adopts the hydrodynamic load of cylindrical column to be better than square column.
The circular hole quantity of the application can be greater than three, but total perforated area can not be greater than 20% of ballast tank area.
During installation, ballast tank is bubbled through the water column.During work, ballast tank is dipped under water, and platform drinking water meets stability requirement.
Disc ballast tank is axisymmetric, and structure is not selective to hydrodynamic load.
Beneficial effect of the present invention:
The hydrodynamic performance of the structure of the application is symmetrical; Height of center of buoyancy; Center of gravity is low.The effect of collar plate shape ballast tank is the symmetry improving constitution water power performance, reduces the center of gravity of structure, increases the vertical of structure and swings damping; The effect of surface caisson improves centre of buoyancy, and the raising of centre of buoyancy and the reduction of center of gravity can improve the stability of floating structure greatly, and the symmetry of structure swings with hanging down the hydrodynamic performance that damping can significantly improve structure.Circular hole on ballast tank is that through hole is to reduce the resistance of structure heave movement, circular ballast tank upper surface installs four columns, wherein three columns are arranged on the edge of ballast tank, arrange in equilateral triangle, center stand column is arranged on ballast tank center, three columns are connected with strut by surface caisson with center stand column respectively, adopt and be welded to connect between all components.
Accompanying drawing explanation
Fig. 1 existing semi-submersible type offshore wind power foundation structural representation;
Fig. 2 semi-submersible type offshore wind power foundation of the present invention structural representation;
In figure, 1, hound, 2, tower cylinder, 3, triatic stay, 4, column, 5, buoyancy tank, 6, strut, 7, cylindrical column, 8, center stand column, 9, circular hole, 10, ballast tank, 11, surface caisson.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is described in detail:
Existing semi-submersible type offshore wind power foundation structure, as shown in Figure 1, specifically comprise: hound 1, tower cylinder 2, triatic stay 3, column 4, buoyancy tank 5, is connected by buoyancy tank 5 between column 4, tower cylinder 2 is arranged on the center that multiple column 4 surrounds, column 4 and tower cylinder 2 between supported by hound 1 and triatic stay 3, existing buoyancy tank 5 is positioned at the keel place of platform, i.e. the bottom of column 4.The shortcoming existed is: buoyancy tank 5 is asymmetric, causes the structure motion under different directions wind (wave) load action different, thus makes the wind energy conversion efficiency of blower fan when different wind direction different, larger to the influence of fluctuations of electrical network.Centre of buoyancy is lower, and center of gravity is higher, and the hydrodynamic performance of structure is poor.
A kind of semi-submersible type offshore wind power foundation structure of the application, as shown in Figure 2, comprise ballast tank 10, the edge-perpendicular of described ballast tank 10 is provided with multiple cylindrical column 7, the central vertical of ballast tank 10 is provided with center stand column 8, described multiple cylindrical column 7 is symmetrically distributed in the edge of ballast tank 10, and multiple cylindrical column 7 and center stand column 8 are all arranged in the same plane of ballast tank 10, and each cylindrical column 7 is all connected with center stand column 8 by surface caisson 11.
Ballast tank 10 in multiple cylindrical column 7 between adjacent two columns is provided with multiple circular hole 9.
Also be provided with the strut 6 of playing a supporting role between each cylindrical column 7 and center stand column 8, described strut 6 is symmetrically distributed in top and the below of surface caisson 11.Ballast tank 10 is disc ballast tank.The number of circular hole 9 is three.The number of cylindrical column 7 is three, and three summits of cylindrical column 7 in equilateral triangle are arranged on ballast tank 10.
The hydrodynamic performance of the structure of the application is symmetrical; Height of center of buoyancy; Center of gravity is low.The effect of collar plate shape ballast tank is the symmetry improving constitution water power performance, reduces the center of gravity of structure, increases the vertical of structure and swings damping; The effect of surface caisson 11 improves centre of buoyancy, and the raising of centre of buoyancy and the reduction of center of gravity can improve the stability of floating structure greatly, and the symmetry of structure swings with hanging down the hydrodynamic performance that damping can significantly improve structure.Circular hole 9 on ballast tank 10 is that through hole is to reduce the resistance of structure heave movement, circular ballast tank upper surface installs four columns, wherein three columns are arranged on the edge of ballast tank 10, arrange in equilateral triangle, center stand column 8 is arranged on ballast tank 10 center, three columns are connected with strut 6 by surface caisson 11 with center stand column 8 respectively, adopt and be welded to connect between all components.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (8)
1. a semi-submersible type offshore wind power foundation structure, it is characterized in that, comprise ballast tank, the edge-perpendicular of described ballast tank is provided with multiple column, the central vertical of ballast tank is provided with center stand column, described multiple column is symmetrically distributed in the edge of ballast tank, and multiple column and center stand column are all arranged in the same plane of ballast tank, and each column is all connected with center stand column by surface caisson.
2. a kind of semi-submersible type offshore wind power foundation structure as claimed in claim 1, is characterized in that, the ballast tank in described multiple column between adjacent two columns is provided with multiple circular hole.
3. a kind of semi-submersible type offshore wind power foundation structure as claimed in claim 1, is characterized in that, be also provided with the strut of playing a supporting role between described each column and center stand column, described strut is symmetrically distributed in top and the below of surface caisson.
4. a kind of semi-submersible type offshore wind power foundation structure as claimed in claim 1, it is characterized in that, described ballast tank is disc ballast tank.
5. a kind of semi-submersible type offshore wind power foundation structure as claimed in claim 1, it is characterized in that, described column is cylindrical column.
6. a kind of semi-submersible type offshore wind power foundation structure as claimed in claim 2, is characterized in that, the number of described circular hole is three.
7. a kind of semi-submersible type offshore wind power foundation structure as claimed in claim 1, is characterized in that, the number of described column is three, and three columns are arranged symmetrically on ballast tank.
8. a kind of semi-submersible type offshore wind power foundation structure as claimed in claim 1, it is characterized in that, described multiple column is the column that structure is identical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510229649.5A CN104790426B (en) | 2015-05-07 | 2015-05-07 | Semi-submersible type offshore wind power foundation structure |
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| CN201510229649.5A CN104790426B (en) | 2015-05-07 | 2015-05-07 | Semi-submersible type offshore wind power foundation structure |
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| CN104790426A true CN104790426A (en) | 2015-07-22 |
| CN104790426B CN104790426B (en) | 2017-01-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757336A (en) * | 2018-05-03 | 2018-11-06 | 明阳智慧能源集团股份公司 | A kind of four columns band ballast semi-submersible type floating blower foundation |
| CN110435838A (en) * | 2019-08-29 | 2019-11-12 | 广州船舶及海洋工程设计研究院（中国船舶工业集团公司第六0五研究院） | Equipment carries surface unit |
| WO2020136288A1 (en) * | 2018-12-28 | 2020-07-02 | Dragados, S.A. (45,84%) | Floating platform for high-power wind turbines |
| CN112455617A (en) * | 2020-12-04 | 2021-03-09 | 清华大学 | Novel semi-submersible offshore wind power platform |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757336A (en) * | 2018-05-03 | 2018-11-06 | 明阳智慧能源集团股份公司 | A kind of four columns band ballast semi-submersible type floating blower foundation |
| WO2020136288A1 (en) * | 2018-12-28 | 2020-07-02 | Dragados, S.A. (45,84%) | Floating platform for high-power wind turbines |
| US11920559B2 (en) | 2018-12-28 | 2024-03-05 | Dragados S.A. | Floating platform for high-power wind turbines |
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| CN112455617A (en) * | 2020-12-04 | 2021-03-09 | 清华大学 | Novel semi-submersible offshore wind power platform |
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| CN104790426B (en) | 2017-01-25 |
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