Floating-type offshore structure and floating-type offshore power generator including the same

Abstract

To provide a floating-type offshore structure.SOLUTION: A floating-type offshore structure includes a plurality of columns, and a plurality of pontoons provided on respective bottom ends of the columns. A polygonal configuration is formed by a virtual line connecting the columns. The pontoons are provided inside the polygonal configuration. The cross-sectional area of the pontoon in a direction parallel to the sea water surface is greater than or the same as the cross-sectional area of the column in the direction parallel to the sea water surface. The pontoon may have a configuration projecting outside a bottom end of the column.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a floating offshore structure and a floating marine power generation device equipped with the same. [Background technology]

[0002] As issues such as environmental regulations due to global warming and concerns about the supply and demand of fossil fuels come to the fore, interest is growing in wind power generation, one of the new renewable energy production systems.

[0003] 2. Description of the Related Art Wind turbines are devices installed on land or sea that convert wind energy into electrical energy to produce electricity.

[0004] Wind turbines have been mainly installed on land, but installations at sea are gradually increasing. The quality of wind at sea is generally better than on land for wind power generation, and there are advantages in that the problem of noise from the blades can be dealt with more easily. In particular, the establishment of large-scale complexes is required to ensure economic viability, but it is difficult to establish such complexes on land, so coastal and offshore areas are emerging as large-scale offshore wind farms.

[0005] Structures for installing wind turbines on the sea can be broadly divided into fixed and floating types. Fixed structures are structures that are directly attached to the seabed, as on land, and respond to environmental loads through structural deformation, while floating structures float on the water surface and are subjected to their own weight, buoyancy, environmental loads, and mooring forces, and are able to withstand environmental loads through the movement of the structure and the mooring forces.

[0006] Until recently, offshore wind turbines were fixed and mainly installed in shallow waters. Fixed structures provide favorable power generation conditions because the structure is fixed to the seabed, but as the water gets deeper, the scale of the structure becomes too large and it becomes difficult to avoid the risk of fatigue failure. In addition, with the trend toward larger wind turbines, there is a problem that the costs of manufacturing and installing the structure increase exponentially.

[0007] In addition, the wind is stronger and more constant the further away from land, which increases the efficiency of power generation. Therefore, the need for developing wind power generation in deep waters far from the coast is gradually being raised. Therefore, much research is being conducted on offshore wind power generation devices using floating structures that are not limited by the size of the structure even when the water is deep. Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been created to improve upon the conventional technology, and one object of the present invention is to provide a floating marine structure that can be installed regardless of water depth, and a floating marine power generation device equipped with the same. [Means for solving the problem]

[0009] According to one aspect of the present invention, a floating marine structure includes a plurality of columns and a plurality of pontoons provided at a lower end of each of the columns, wherein a polygonal shape is formed by imaginary lines connecting the columns, the pontoons are provided inside the polygonal shape, a cross-sectional area of ​​the pontoons in a direction parallel to the seawater surface is greater than or equal to a cross-sectional area of ​​the columns in a direction parallel to the seawater surface, and the pontoons may have a shape protruding outward from the lower ends of the columns.

[0010] Specifically, the protruding length of the pontoon may be equal to or less than the thickness of a fender used for docking the column to a quay.

[0011] Specifically, the power generating structure may further include a center column disposed within a polygonal shape formed by the columns and supporting a power generating structure provided at an upper portion thereof, and a main pontoon provided at a lower end of the center column.

[0012] Specifically, the structure may further include a plurality of braces, some of which connect the pontoons to each other, other parts of which connect the pontoons to the main pontoon, and the remainder of the braces may connect the lower part of the column to the upper part of the main column or the pontoons to the upper part of the main column.

[0013] In particular, the watercraft may further include a plurality of dampers connected to the pontoons, respectively, and the dampers may have an extended shape extending from the pontoons.

[0014] Specifically, the pontoon may have a shape extending inwardly from the polygonal shape.

[0015] Specifically, the power generation structure may further include a tower support column for supporting a tower of the power generation structure, the tower support column being disposed at a position eccentric to one side of the inside of the polygonal shape from the center of the polygonal shape.

[0016] Specifically, the hinge may further include a center column provided at the center of the polygonal shape, and braces connecting the columns to the center column.

[0017] Specifically, the tower support column may be provided at one point on one of the braces.

[0018] Specifically, the interiors of the columns, the center column, and the tower support column are filled with ballast water, and the amount of ballast water filled in the columns adjacent to the tower support column among the columns and the center column may be less than the amount of ballast water filled in the other columns.

[0019] Specifically, the tower support column may further include a brace connecting each of the columns to the tower support column, and a length of the brace connecting the column adjacent to the wharf to the tower support column may be shorter than a length of the brace connecting the column away from the wharf to the tower support column.

[0020] Specifically, the power generation structure may further include a tower, a structural reinforcement member extending from a lower portion of the tower, and a plurality of braces connecting the tower and the column, the tower being disposed at the center of the polygonal shape, a lower end of the tower being higher than a lower end of the column, and the brace may include at least a lower end brace connecting the structural reinforcement member and the lower end of the column.

[0021] Specifically, the tower may further include a pontoon provided at a lower end of the column, and the tower may include a first tower and a second tower disposed below the first tower.

[0022] Specifically, the column may have a cross section parallel to the sea level that is circular or polygonal, such as square or hexagonal.

[0023] A floating marine power generation system according to one aspect of the present invention may include the floating marine structure described above, and a power generation structure provided on the floating marine structure. Effect of the Invention

[0024] The floating marine structure and the floating marine power generation device according to the present invention can be installed without being affected by the water depth at the installation site. [Brief description of the drawings]

[0025] [Figure 1] FIG. 2 is a diagram for explaining a floating marine power generation device including a floating marine structure according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view for explaining the floating offshore structure FOS shown in FIG. [Diagram 3] FIG. 3 is a perspective view for explaining a first column and a first pontoon in FIG. 2. [Figure 4] FIG. 3 is a perspective view for explaining second and third columns and second and third pontoons in FIG. 2. [Diagram 5] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 6] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 7] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 8] FIG. 8 is an exploded perspective view of the floating marine structure shown in FIG. [Figure 9] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 10] FIG. 10 is an exploded perspective view of the floating marine structure shown in FIG. [Figure 11] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 12] FIG. 12 is a bottom view of the floating marine structure shown in FIG. [Figure 13] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 14] FIG. 14 is a bottom view of the floating marine structure shown in FIG. [Figure 15] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 16] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 17] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 18] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 19] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 20] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 21] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 22]FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Diagram 23] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 24] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Diagram 25] FIG. 25 is a plan view of the floating marine structure shown in FIG. 24. [Figure 26] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 27] FIG. 27 is a plan view of the floating marine structure shown in FIG. 26. [Figure 28] FIG. 11 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention. [Figure 29] FIG. 29 is a plan view of the floating marine structure shown in FIG. 28. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The object, particular advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments with reference to the accompanying drawings. In this specification, when referring to the components in each drawing, it should be noted that the same components are referred to by the same numbers as much as possible even if they are displayed in different drawings. In addition, when describing the present invention, if it is determined that a detailed description of related publicly known technology unnecessarily obscures the gist of the present invention, the detailed description will be omitted.

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] FIG. 1 is a diagram for explaining a floating marine power generation device including a floating marine structure according to an embodiment of the present invention.

[0029] Referring to FIG. 1, a floating marine power system may include a floating offshore structure FOS and a power generation structure PGS.

[0030] The floating offshore structure FOS may be a structure that supports the power generation structure PGS. The floating offshore structure FOS may include a plurality of columns 100, a plurality of pontoons 200, a plurality of braces 300, and a plurality of horizontal stiffeners 400.

[0031] The columns 100 may be vertical structures of the floating offshore structure FOS, the pontoons 200 may be buoyant bodies that provide buoyancy to the floating offshore structure FOS, and the braces 300 may connect the columns 100 and the pontoons 200 to improve the structural stability of the floating offshore structure FOS. Also, the horizontal reinforcements 400 may act as braces that connect the upper ends of the columns 100.

[0032] The power generation structure PGS may be provided on the floating offshore structure FOS. The power generation structure PGS may include a tower TW, a nacelle NC, and blades BL.

[0033] The tower TW may be provided on the floating offshore structure FOS. Here, the tower TW may be provided on one of the columns 100 of the floating offshore structure FOS. That is, the power generation structure PGS may be provided eccentrically on one side of the floating offshore structure FOS.

[0034] A nacelle NC may be provided on top of the tower TW. The nacelle NC is capable of producing electricity from the rotational force of the blades BL.

[0035] The blades BL are rotatably mounted on the nacelle NC and can be rotated by wind force.

[0036] In the present embodiment, the power generating structure PGS is eccentrically disposed on one side of the floating offshore structure FOS, but the present invention is not limited thereto. For example, the power generating structure may be disposed at the center of the floating offshore structure FOS.

[0037] FIG. 2 is a perspective view for explaining the floating offshore structure FOS shown in FIG. 1, FIG. 3 is a perspective view for explaining the first column and the first pontoon in FIG. 2, and FIG. 4 is a perspective view for explaining the second and third columns and the second and third pontoons in FIG. 2.

[0038] 2 to 4, the floating offshore structure FOS may include a plurality of columns 110, 120, 130, a plurality of pontoons 210, 220, 230, a plurality of braces 300, and a plurality of horizontal stiffeners 410, 420, 430.

[0039] The columns 110, 120, 130 may support a superstructure, for example, a power generating structure PGS. The floating offshore structure FOS may have a polygonal shape according to imaginary lines connecting the columns 110, 120, 130. That is, the columns 110, 120, 130 may be disposed at the vertices of the polygonal shape.

[0040] The multiple columns 110, 120, 130 may include the first to third columns 110, 120, 130. Meanwhile, in this embodiment, the floating offshore structure FOS includes three columns 110, 120, 130, but is not limited thereto. For example, the floating offshore structure FOS may include four or more columns.

[0041] The cross section of the first to third columns 110, 120, 130 parallel to the sea water surface has a polygonal shape, and the first to third columns 110, 120, 130 may have the same or different cross sections. For example, the cross section of the first column 110 parallel to the sea water surface may be a hexagonal shape with areas adjacent to two opposing vertices of a rectangle chamfered. Here, the chamfered areas of the first to third columns 110, 120, 130 may be arranged toward the outside of the floating offshore structure FOS. The chamfered areas of the first to third columns 110, 120, 130 may be arranged to face the outside of the polygonal shape formed by the multiple columns 110, 120, 130.

[0042] Meanwhile, in this embodiment, the cross section of the first to third columns 110, 120, 130 parallel to the sea water surface has a polygonal shape, but is not limited to this. For example, the cross sections of the first to third columns 110, 120, 130 parallel to the sea water surface may have straight lines in the parts that contact the multiple pontoons 210, 220, 230, and other areas may have a curved shape. Also, the cross sections of the first to third columns 110, 120, 130 parallel to the sea water surface may have a shape in which a part of a circle is cut in a straight line, and the pontoons 210, 220, 230 are provided in the cut areas.

[0043] The multiple pontoons 210, 220, 230 may include first to third pontoons 210, 220, 230. The first to third pontoons 210, 220, 230 may be provided at lower ends of the first to third columns 110, 120, 130. Here, the first to third pontoons 210, 220, 230 may be provided inside a polygonal shape formed by the first to third columns 110, 120, 130.

[0044] Additionally, the size of the first pontoon 210 may be greater than the sizes of the second pontoon 220 and the third pontoon 230. Therefore, the buoyancy provided by the first pontoon 210 may be greater than the buoyancy provided by each of the second pontoon 220 and the third pontoon 230.

[0045] The cross sections of the first to third pontoons 210, 220, and 230 parallel to the sea water surface have a polygonal shape, and may have the same cross section or different cross sections. For example, the cross section of the first pontoon 210 parallel to the sea water surface may be a hexagonal shape in which the area adjacent to two vertices of a rectangle disposed away from the first column 110 is chamfered. Also, the cross sections of the second pontoon 220 and the third pontoon 230 may be a shape in which at least one of two vertices of a rectangle disposed away from the second column 120 and the third column 130 is chamfered. The chamfered areas in the cross sections of the first to third pontoons 210, 220, and 230 may be straight or rounded curved shapes.

[0046] The chamfered areas of the first to third pontoons 210, 220, 230 may be arranged to face the inside of the polygonal shape formed by the multiple columns 110, 120, 130.

[0047] The first to third pontoons 210, 220, and 230 may have hollow portions HP. The hollow portions HP are formed in a direction perpendicular to the sea surface, and can prevent the first to third columns 110, 120, and 130 from being damaged by waves or the like.

[0048] The braces 300 can improve the structural stability of the floating offshore structure FOS by connecting the columns 100 and the pontoons 200. In addition, the horizontal reinforcements 400 can act as braces connecting the upper ends of the columns 100.

[0049] In the floating offshore structure FOS as described above, the first to third pontoons 210, 220, 230 may be provided on the inner surfaces of the lower ends of the first to third columns 110, 120, 130. This can be advantageous for a ship to come alongside a quay for installing or maintaining the floating offshore structure FOS and the power generation structure PGS.

[0050] 5 and 6 are perspective views illustrating a floating marine structure according to still another embodiment of the present invention.

[0051] 5 and 6, the floating offshore structure FOS may include a plurality of columns 160, 170, 180, a structural reinforcement member 500, and a plurality of braces 310, 320, 330, 340, 350, 360. Additionally, as shown in FIG. 6, the floating offshore structure FOS may further include a plurality of pontoons 210, 220, 230.

[0052] The plurality of columns 160, 170, 180 may support a superstructure, for example, a power generating structure PGS. The plurality of columns 160, 170, 180 may include first to third columns 160, 170, 180. A cross section parallel to the sea level of the tower TW and the first to third columns 160, 170, 180 may have a circular shape.

[0053] The position of the upper end of the tower TW may be higher than the positions of the upper ends of the columns 160, 170, and 180, and the position of the lower end of the tower TW may be lower than the positions of the upper ends of the columns 160, 170, and 180 and higher than the positions of the lower ends of the columns 160, 170, and 180.

[0054] The columns 160, 170, and 180 may include first to third columns 160, 170, and 180. The heights of the first to third columns 160, 170, and 180 may be the same as each other.

[0055] The structural reinforcement member 500 may extend from the lower portion of the tower TW. The structural reinforcement member 500 extends from the lower end of the tower TW to provide an installation space for the braces 310, 320, 330, 340, 350, and 360 that connect the tower TW to the first to third columns 160, 170, and 180.

[0056] The multiple braces 310, 320, 330, 340, 350, 360 may include first to third upper end braces 310, 320, 330 and first to third lower end braces 340, 350, 360.

[0057] The first to third upper end braces 310, 320, 330 may connect the lower end of the tower TW to the upper ends of the first to third columns 160, 170, 180. For example, the first upper end brace 310 may connect the lower end of the tower TW to the upper end of the first column 160. The second upper end brace 320 may connect the lower end of the tower TW to the upper end of the second column 170. The third upper end brace 330 may connect the lower end of the tower TW to the upper end of the third column 180.

[0058] The first to third bottom end braces 340, 350, 360 may connect the structural reinforcement member 500 to the bottom ends of the first to third columns 160, 170, 180. For example, the first bottom end brace 340 may connect the structural reinforcement member 500 to the bottom end of the first column 160. The second bottom end brace 350 may connect the structural reinforcement member 500 to the bottom end of the second column 170. The third bottom end brace 360 ​​may connect the structural reinforcement member 500 to the bottom end of the third column 180.

[0059] In the floating marine structure FOS shown in Fig. 6, the multiple pontoons 210, 220, 230 include first to third pontoons 210, 220, 230, and the first to third pontoons 210, 220, 230 may be provided inside the lower ends of the first to third columns 160, 170, 180, respectively. Here, the first to third lower end braces 340, 350, 360 are not directly connected to the lower ends of the first to third columns 160, 170, 180, but may connect the first to third pontoons 210, 220, 230 to a structural reinforcement member 500.

[0060] Each of the first to third pontoons 210, 220, and 230 may include a hollow portion HP. The hollow portion HP is formed in a direction perpendicular to the sea surface, and can prevent the first to third columns 160, 170, and 180 from being damaged by waves or the like.

[0061] By providing the structural reinforcement member 500, the floating offshore structure FOS as described above can easily secure installation space for the braces 310, 320, 330, 340, 350, 360, particularly the first to third lower end braces 340, 350, 360, which connect the tower TW to the first to third columns 160, 170, 180.

[0062] Figures 7 and 9 are perspective views for explaining a floating marine structure according to yet another embodiment of the present invention, Figure 8 is an exploded perspective view of the floating marine structure shown in Figure 7, and Figure 10 is an exploded perspective view of the floating marine structure shown in Figure 9.

[0063] 7-10, the floating offshore structure FOS may include a number of columns 160, 170, 180, a structural reinforcement member 500, a number of braces 310, 320, 330, 340, 350, 360, 370, 380, 390, and a number of pontoons 210, 220, 230.

[0064] A number of columns 160, 170, 180 may support a superstructure, for example a power generation structure PGS.

[0065] In a floating offshore structure FOS, the tower TW may be located in the center and the columns 160, 170, 180 may be arranged around the tower TW.

[0066] A power generating structure PGS may be provided on the tower TW.

[0067] The height of the upper end of the tower TW may be higher than the height of the upper ends of the columns 160, 170, 180, and the height of the lower end of the tower TW may be lower than the height of the upper ends of the columns 160, 170, 180 and higher than the height of the lower ends of the columns 160, 170, 180.

[0068] The tower TW may include a first tower section TW1 and a second tower section TW2. The first tower section TW1 may be disposed at a lower portion of the second tower section TW2, and the second tower section TW2 may be disposed at an upper portion of the first tower section TW1. The position of the upper portion of the first tower section TW1 may be substantially the same as the position of the upper portions of the columns 160, 170, and 180. Also, the lower end of the first tower section TW1 may be located at a higher position than the lower ends of the columns 160, 170, and 180.

[0069] A cross section parallel to sea level of the first tower section TW1 and the second tower section TW2 may have a circular shape.

[0070] The columns 160, 170, 180 may include first to third columns 160, 170, 180. The heights of the first to third columns 160, 170, 180 may be the same. A cross section parallel to sea level of the first to third columns 160, 170, 180 may have a circular shape.

[0071] 9 and 10, the diameters of the lower ends of the first to third columns 160, 170, 180 may be larger than the diameters of the upper ends of the first to third columns 160, 170, 180. Also, the diameters of the lower ends of the first to third columns 160, 170, 180 may increase toward the bottom. That is, the lower ends of the first to third columns 160, 170, 180 may be tapered.

[0072] The structural reinforcement member 500 may extend from the lower portion of the first tower section TW1. The structural reinforcement member 500 extends from the lower end of the first tower section TW1 to provide an installation space for the braces 310, 320, 330, 340, 350, 360, 370, 380, and 390 that connect the first tower section TW1 to the first to third columns 160, 170, and 180.

[0073] The multiple braces 310, 320, 330, 340, 350, 360, 370, 380, 390 may include first to third upper end braces 310, 320, 330, first to third diagonal braces 370, 380, 390, and first to third lower end braces 340, 350, 360.

[0074] The first to third upper end braces 310, 320, 330 may connect the upper ends of the first to third columns 160, 170, 180 to the first tower section TW1. For example, the first upper end brace 310 may connect the upper end of the first column 160 to the first tower section TW1. The second upper end brace 320 may connect the upper end of the second column 170 to the first tower section TW1. The third upper end brace 330 may connect the upper end of the third column 180 to the first tower section TW1.

[0075] The first to third diagonal braces 370, 380, 390 may connect the lower ends of the first to third columns 160, 170, 180 to the first tower section TW1. For example, the first diagonal brace 370 may connect the lower end of the first column 160 to the first tower section TW1. The second diagonal brace 380 may connect the lower end of the second column 170 to the first tower section TW1. The third diagonal brace 390 may connect the lower end of the third column 180 to the first tower section TW1.

[0076] The first to third bottom end braces 340, 350, 360 may connect the structural reinforcement member 500 to the bottom ends of the first to third columns 160, 170, 180. For example, the first bottom end brace 340 may connect the structural reinforcement member 500 to the bottom end of the first column 160. The second bottom end brace 350 may connect the structural reinforcement member 500 to the bottom end of the second column 170. The third bottom end brace 360 ​​may connect the structural reinforcement member 500 to the bottom end of the third column 180.

[0077] In the floating offshore structure FOS shown in Figures 7 to 10, the first to third upper end braces 310, 320, 330 and the first to third lower end braces 340, 350, 360 may be provided parallel to the seawater surface, and the first to third diagonal braces 370, 380, 390 may be provided inclined to the seawater surface. That is, in the floating offshore structure FOS shown in Figures 7 to 10, the first to third upper end braces 310, 320, 330, the first to third diagonal braces 370, 380, 390 and the first to third lower end braces 340, 350, 360 can complete a trust structure.

[0078] The multiple pontoons 210, 220, 230 may include first to third pontoons 210, 220, 230. The first to third pontoons 210, 220, 230 may be provided at the lower parts of the first to third columns 160, 170, 180, respectively. The cross sections of the first to third pontoons 210, 220, 230 parallel to the sea water surface may be circular.

[0079] The diameters of the first to third pontoons 210, 220, 230 may be the same as the diameters of the lower ends of the first to third columns 160, 170, 180. For example, as shown in Figs. 7 and 8, the diameters of the first to third pontoons 210, 220, 230 may be the same as the diameters of the lower ends of the first to third columns 160, 170, 180. Also, as shown in Figs. 9 and 10, the diameters of the first to third pontoons 210, 220, 230 may be the same as the diameters of the lower ends of the first to third columns 160, 170, 180. That is, the diameters of the first to third pontoons 210, 220, 230 may be larger than the diameters of the upper ends of the first to third columns 160, 170, 180.

[0080] In the floating offshore structure FOS according to this embodiment, the tower TW, the first to third columns 160, 170, 180, and the braces 310, 320, 330, 340, 350, 360, 370, 380, 390 can be manufactured as one block, and the tower TW and the first to third pontoons 210, 220, 230 can be manufactured as separate blocks. That is, the floating offshore structure FOS according to this embodiment can be easily manufactured separately by forming each structure into a block.

[0081] Figures 11, 13, and 15 to 18 are oblique views for explaining a floating marine structure according to still another embodiment of the invention, Figure 12 is a bottom view of the floating marine structure shown in Figure 11, and Figure 14 is a bottom view of the floating marine structure shown in Figure 13.

[0082] 11-18, the floating offshore structure FOS may include a tower TW, a plurality of columns 160, 170, 180, a plurality of pontoons 260, 270, and a plurality of horizontal stiffeners 410, 420, 430.

[0083] The plurality of columns 160, 170, 180 may support a superstructure, for example, a power generating structure PGS. The plurality of columns 160, 170, 180 may include first to third columns 160, 170, 180.

[0084] A nacelle NC and blades BL of the power generation structure PGS may be provided on the tower TW.

[0085] The height of the upper end of the tower TW may be greater than the height of the upper ends of the columns 160, 170, 180, and the height of the lower end of the tower TW may be substantially the same as or greater than the height of the lower ends of the columns 160, 170, 180. A cross section of the tower TW parallel to the sea level may be circular in shape.

[0086] The columns 160, 170, and 180 may include first to third columns 160, 170, and 180. The heights of the first to third columns 160, 170, and 180 may be the same as each other.

[0087] A cross section parallel to the sea water level of the first to third columns 160, 170, 180 may have a polygonal shape. For example, as shown in Figures 11 to 14, a cross section parallel to the sea water level of the first to third columns 160, 170, 180 may have a rectangular shape.

[0088] 15 to 18, the cross section parallel to the sea level of the first to third columns 160, 170, 180 may be hexagonal. Here, the width of the area of ​​the first to third columns 160, 170, 180 adjacent to the tower TW may be larger than the width of the area of ​​the first to third columns 160, 170, 180 away from the tower TW.

[0089] The multiple pontoons 260, 270 may include an auxiliary pontoon 270 provided inside the lower ends of the first to third columns 160, 170, 180. Here, the auxiliary pontoon 270 may have a shape that covers the remaining three faces of the first to third columns 160, 170, 180 except for the outer faces thereof. In addition, the auxiliary pontoon 270 may have a trapezoidal or hexagonal shape, and the width of the area adjacent to the first to third columns 160, 170, 180 may be smaller than the width of the area separated from the first to third columns 160, 170, 180.

[0090] 16 to 18, the plurality of pontoons 270 may further include a main pontoon 260 provided at the lower end of the tower TW. The main pontoon 260 may be provided in a form that covers the lower end of the tower TW. A cross section of the main pontoon 260 parallel to the sea water surface may have a shape corresponding to a cross section of the tower TW parallel to the sea water surface.

[0091] For example, if the cross section of the tower TW parallel to the sea level is circular, the cross section of the main pontoon 260 parallel to the sea level may also be circular.

[0092] A plurality of horizontal reinforcements 410, 420, 430 are installed parallel to the seawater surface and may connect the upper ends of the first to third columns 160, 170, 180 to the tower TW. That is, the horizontal reinforcements 410, 420, 430 may function as braces that connect the upper ends of the first to third columns 160, 170, 180 to the tower TW.

[0093] The plurality of horizontal reinforcements 410, 420, 430 may include first to third reinforcements 410, 420, 430. One end of the first reinforcement 410 may be connected to the tower TW, and the other end of the first reinforcement 410 may be connected to the first column 160. One end of the second reinforcement 420 may be connected to the tower TW, and the other end of the second reinforcement 420 may be connected to the second column 170. One end of the third reinforcement 420 may be connected to the tower TW, and the other end of the third reinforcement 420 may be connected to the third column 180.

[0094] Meanwhile, in consideration of the structural stability of the floating offshore structure FOS, a plurality of braces 300 may be further included. The plurality of braces 300 may be provided in various forms.

[0095] As shown in Fig. 11, the brace 300 can connect the lower ends of the first to third columns 160, 170, and 180 to a part of the lower end of the tower TW. In Fig. 20, the brace 300 can have a shape that extends in a direction inclined toward sea level.

[0096] 13 and 18, a portion of the brace 300 may connect each of the auxiliary pontoons 270. Another portion of the brace 300 may connect the auxiliary pontoons 270 and the tower TW, or the auxiliary pontoons 270 and the main pontoons 260, horizontally to the seawater surface. Yet another portion of the brace 300 may connect the auxiliary pontoons 270 and the tower TW at an incline to the seawater surface. The remainder of the brace 300 may also connect the first to third columns 160, 170, 180 and the auxiliary pontoons 270 at an incline.

[0097] 17, a portion of the brace 300 can connect each of the pontoons 270. Another portion of the brace 300 can connect the auxiliary pontoons 270 and the tower TW, or the auxiliary pontoons 270 and the main pontoons 260, horizontally to the seawater surface. Yet another portion of the brace 300 can connect the auxiliary pontoons 260 and the tower TW at an incline to the seawater surface.

[0098] 19 and 20 are perspective views illustrating a floating marine structure according to still another embodiment of the present invention.

[0099] 19 and 20, the floating offshore structure FOS may include a tower TW, a number of columns 160, 170, 180, CC, a number of pontoons 260, 270, and a number of horizontal stiffeners 410, 420, 430.

[0100] The plurality of columns 160, 170, 180, and CC may support a superstructure, for example, a power generating structure PGS. The plurality of columns 160, 170, 180, and CC may include first to third columns 160, 170, and 180 and a center column CC.

[0101] The first to third columns 160, 170, 180 may be arranged outside the center column CC. For example, the first to third columns 160, 170, 180 may be arranged to correspond to the vertices of a polygon, for example, a triangle.

[0102] The heights of the first to third columns 160, 170, 180 may be the same. The cross sections parallel to the sea water level of the first to third columns 160, 170, 180 may be circular or polygonal. For example, as shown in Fig. 19, the cross sections parallel to the sea water level of the first to third columns 160, 170, 180 may be hexagonal.

[0103] Here, the width of the area of ​​the first to third columns 160, 170, 180 adjacent to the center column CC may be larger than the width of the area of ​​the first to third columns 160, 170, 180 separated from the center column CC.

[0104] The tower TW, nacelle NC, and blades BL of the power generating structure PGS may be installed on the center column CC. The height of the center column CC may be equal to or greater than the heights of the first to third columns 160, 170, and 180.

[0105] The center column CC may be provided inside a polygon formed by the first to third columns 160, 170, and 180. For example, the center column CC may be provided corresponding to the center of a triangle formed by the first to third columns 160, 170, and 180.

[0106] The multiple pontoons 260, 270 may include a main pontoon 260 provided at the lower end of the center column CC, and auxiliary pontoons 270 provided inside the lower ends of the first to third columns 160, 170, 180.

[0107] The main pontoons 260 may be provided in a form that covers the lower end of the center column CC. A cross section of the main pontoons 260 parallel to the sea water surface may have a shape that corresponds to a cross section of the center column CC parallel to the sea water surface. For example, if the cross section of the center column CC parallel to the sea water surface is circular, the cross section of the main pontoons 260 parallel to the sea water surface may also be circular.

[0108] The auxiliary pontoon 270 may have a shape that covers the remaining three sides except for the outer sides of the first to third columns 160, 170, and 180. In addition, the auxiliary pontoon 270 may be trapezoidal or hexagonal, and the width of the area adjacent to the first to third columns 160, 170, and 180 may be smaller than the width of the area away from the first to third columns 160, 170, and 180.

[0109] The auxiliary pontoons 270 are provided to have a cross-sectional area larger than or equal to that of the first to third columns 160, 170, and 180, and the auxiliary pontoons 270 may have a shape protruding outward (one side approaching a wharf) from the lower ends of the first to third columns 160, 170, and 180. Here, the length of the auxiliary pontoons 270 protruding from the lower ends of the first to third columns 160, 170, and 180 may be determined in consideration of the thickness of an insect-proof member such as a fender used when approaching a wharf. That is, the length of the auxiliary pontoons 270 protruding outward may be less than the thickness of the fender. In this case, the length of the auxiliary pontoons 270 protruding outward is formed relatively smaller than the length of the auxiliary pontoons 270 protruding inward toward the main pontoons 260.

[0110] A plurality of horizontal reinforcements 410, 420, 430 are installed parallel to the seawater surface and can connect the upper ends of the first to third columns 160, 170, 180 to the upper end of the center column CC. That is, the horizontal reinforcements 410, 420, 430 can function as braces 300 that connect the upper ends of the first to third columns 160, 170, 180 to the upper end of the center column CC.

[0111] The plurality of horizontal reinforcements 410, 420, 430 may include first to third reinforcements 410, 420, 430. One end of the first reinforcement 410 may be connected to an upper end of the center column CC, and the other end of the first reinforcement 410 may be connected to the first column 160. One end of the second reinforcement 420 may be connected to an upper end of the center column CC, and the other end of the second reinforcement 420 may be connected to the second column 170. One end of the third reinforcement 420 may be connected to an upper end of the center column CC, and the other end of the third reinforcement 420 may be connected to the third column 180.

[0112] Meanwhile, as shown in Fig. 19, the floating offshore structure FOS of the present invention may further include a plurality of braces 300 in consideration of structural stability. The plurality of braces 300 may be provided in various forms.

[0113] A portion of the brace 300 can connect each of the auxiliary pontoons 270. The remainder of the brace 300 can connect the auxiliary pontoons 270 and the main pontoons 260 horizontally at the sea surface.

[0114] 21 and 22 are perspective views illustrating a floating marine structure according to still another embodiment of the present invention.

[0115] 21 and 22, the floating offshore structure FOS may include a tower TW, a plurality of columns 160, 170, 180, CC, a plurality of pontoons 260, 270, a plurality of braces 300, and a plurality of horizontal stiffeners 410, 420, 430.

[0116] The plurality of columns 160, 170, 180, and CC may support a superstructure, for example, a power generating structure PGS. The plurality of columns 160, 170, 180, and CC may include first to third columns 160, 170, and 180 and a center column CC.

[0117] The first to third columns 160, 170, 180 may be arranged outside the center column CC. For example, the first to third columns 160, 170, 180 may be arranged to correspond to the vertices of a polygon, for example, a triangle.

[0118] The width of the area adjacent to the center column CC of the first to third columns 160, 170, 180 may be greater than the width of the area away from the center column CC of the first to third columns 160, 170, 180. The tower TW, nacelle NC, and blades BL of the power generation structure PGS may be provided on the center column CC. The height of the center column CC may be the same as or greater than the height of the first to third columns 160, 170, 180.

[0119] The center column CC may be provided inside a polygon formed by the first to third columns 160, 170, and 180. For example, the center column CC may be provided corresponding to the center of a triangle formed by the first to third columns 160, 170, and 180.

[0120] The multiple pontoons 260, 270 may include a main pontoon 260 provided at the lower end of the center column CC, and auxiliary pontoons 270 provided inside the lower ends of the first to third columns 160, 170, 180.

[0121] The main pontoons 260 may be provided in a form that covers the lower end of the center column CC. A cross section of the main pontoons 260 parallel to the sea water surface may have a shape that corresponds to a cross section of the center column CC parallel to the sea water surface. For example, if the cross section of the center column CC parallel to the sea water surface is circular, the cross section of the main pontoons 260 parallel to the sea water surface may also be circular.

[0122] The auxiliary pontoon 270 may be shaped to cover the remaining three surfaces of the first to third columns 160, 170, and 180 except for the outer surfaces thereof.

[0123] As shown in FIG. 21, the auxiliary pontoon 270 may be trapezoidal or hexagonal, and the width of the area adjacent to the first to third columns 160, 170, and 180 may be smaller than the width of the area away from the first to third columns 160, 170, and 180.

[0124] Also, as shown in FIG. 22, the auxiliary pontoon 270 may have an arc-shaped region adjacent to the center column CC.

[0125] The plurality of horizontal reinforcements 410, 420, 430 may include first to third reinforcements 410, 420, 430. The horizontal reinforcements 410, 420, 430 are installed parallel to the sea water level and may connect the upper ends of the first to third columns 160, 170, 180 to the upper end of the center column CC. That is, the horizontal reinforcements 410, 420, 430 may serve as braces 300 that connect the upper ends of the first to third columns 160, 170, 180 to the upper end of the center column CC.

[0126] A plurality of braces 300 may be provided, and may be provided in consideration of the structural stability of the floating offshore structure FOS. For example, the braces 300 may connect each of the auxiliary pontoons 270 and the upper end of the main pontoon 260 at an incline toward the seawater surface.

[0127] FIG. 23 is a perspective view illustrating a floating marine structure according to still another embodiment of the present invention.

[0128] Referring to FIG. 23, the floating offshore structure FOS may include a tower TW, a number of columns 160, 170, 180, CC, a number of pontoons 260, 270, and a number of horizontal stiffeners 410, 420, 430.

[0129] The plurality of columns 160, 170, 180, and CC may support a superstructure, for example, a power generating structure PGS. The plurality of columns 160, 170, 180, and CC may include first to third columns 160, 170, and 180 and a center column CC.

[0130] The first to third columns 160, 170, 180 may be arranged outside the center column CC. For example, the first to third columns 160, 170, 180 may be arranged to correspond to the vertices of a polygon, for example, a triangle.

[0131] The width of the area of ​​the first to third columns 160, 170, 180 adjacent to the center column CC may be greater than the width of the area of ​​the first to third columns 160, 170, 180 away from the center column CC.

[0132] The tower TW, nacelle NC, and blades BL of the power generating structure PGS may be installed on the center column CC. The height of the center column CC may be equal to or greater than the heights of the first to third columns 160, 170, and 180.

[0133] The multiple pontoons 260, 270 may include a main pontoon 260 provided at the lower end of the center column CC, and auxiliary pontoons 270 provided inside the lower ends of the first to third columns 160, 170, 180.

[0134] The main pontoons 260 may be provided in a form covering the lower end of the center column CC. The auxiliary pontoons 270 may be shaped to cover the remaining three sides of the first to third columns 160, 170, and 180 except for the outer sides.

[0135] The auxiliary pontoon 270 may be trapezoidal or hexagonal in shape. Also, the regions of the auxiliary pontoon 270 adjacent to the first to third columns 160, 170, and 180 may be arc-shaped.

[0136] On the other hand, a damper DP may be disposed in a direction adjacent to the auxiliary pontoon 270 and the main pontoon 260 .

[0137] The damper DP may have an extended shape from the auxiliary pontoon 270. That is, the damper DP may have a polygonal or arc shape according to the shape of the auxiliary pontoon 270.

[0138] The damper DP can increase the period of the vertical motion of the floating offshore structure FOS by increasing the additional mass of the auxiliary pontoon 270. When the period of the vertical motion of the floating offshore structure FOS is increased, the period of the waves can be avoided. Therefore, the stability of the floating offshore structure FOS can be improved.

[0139] The plurality of horizontal reinforcements 410, 420, 430 may include first to third reinforcements 410, 420, 430. The horizontal reinforcements 410, 420, 430 are installed parallel to the sea water level and may connect the upper ends of the first to third columns 160, 170, 180 to the upper end of the center column CC. That is, the horizontal reinforcements 410, 420, 430 may serve as braces 300 that connect the upper ends of the first to third columns 160, 170, 180 to the upper end of the center column CC.

[0140] FIG. 24 is a perspective view for explaining a floating marine structure according to still another embodiment of the present invention, and FIG. 25 is a plan view of the floating marine structure shown in FIG.

[0141] 24 and 25, the floating offshore structure FOS may include a tower TW, a number of columns 160, 170, 180, CC, TSC, a number of braces 310, 320, 330, 340, 350, 360, and a number of horizontal stiffeners.

[0142] The multiple columns 160, 170, 180, CC, TSC can support a superstructure, for example, a power generation structure PGS. The multiple columns 160, 170, 180, CC, TSC may include first to third columns 160, 170, 180, a center column CC, and a tower support column TSC. The cross sections of the first to third columns 160, 170, 180, the center column CC, and the tower support column TSC parallel to the sea water surface may have various shapes, such as a circle or a polygon. For example, the cross sections of the first to third columns 160, 170, 180, the center column CC, and the tower support column TSC parallel to the sea water surface may be circular.

[0143] The first to third columns 160, 170, 180 may be arranged outside the center column CC. For example, the first to third columns 160, 170, 180 may be arranged to correspond to the vertices of a polygon, for example, a triangle.

[0144] The center column CC may be provided inside a polygon formed by the first to third columns 160, 170, and 180. For example, the center column CC may be provided corresponding to the center of a triangle formed by the first to third columns 160, 170, and 180.

[0145] The center column CC may be equal to or greater in height than the first to third columns 160, 170, 180 and the tower support column TSC.

[0146] The tower TW, nacelle NC, and blades BL of the power generation structure PGS may be installed on the tower support column TSC. The height of the tower support column TSC may be equal to or greater than the heights of the first to third columns 160, 170, 180 and the center column CC.

[0147] The plurality of braces 310, 320, 330, 340, 350, 360 may include upper braces 310, 320, 330 and lower braces 340, 350, 360.

[0148] The upper braces 310, 320, and 330 can connect the upper ends of the first to third columns 160, 170, and 180 to the upper end of the center column CC.

[0149] The lower braces 340, 350, and 360 can connect the lower ends of the first to third columns 160, 170, and 180 to the lower end of the center column CC.

[0150] The upper braces 310, 320, 330 may include first to third upper braces 310, 320, 330. The first upper brace 310 may connect an upper end of the first column 160 to an upper end of the center column CC. The second upper brace 320 may connect an upper end of the second column 170 to an upper end of the center column CC. The third upper brace 330 may connect an upper end of the third column 180 to an upper end of the center column CC.

[0151] The lower braces 340, 350, 360 may include first to third lower braces 340, 350, 360. The first lower brace 340 may connect the lower end of the first column 160 to the lower end of the center column CC. The second lower brace 350 may connect the lower end of the second column 170 to the lower end of the center column CC. The third lower brace 360 ​​may connect the lower end of the third column 180 to the lower end of the center column CC.

[0152] Meanwhile, the tower support column TSC may be provided at a position eccentric to one side of the inside of the polygon formed by the first to third columns 160, 170, and 180 from the center of the polygon.

[0153] For example, the tower support column TSC may be provided at one point on a line connecting the first to third columns 160, 170, and 180 and the center column CC. That is, the tower support column TSC may be provided corresponding to one point of the first upper brace 310 and the first lower brace 340, the second upper brace 320 and the second lower brace 350, and the third upper brace 330 and the third lower brace 360.

[0154] The insides of the first to third columns 160, 170, 180 and the tower support column TSC may be filled with ballast water. Here, since the tower support column TSC is installed at a position other than the center of the polygon formed by the first to third columns 160, 170, 180, the amount of ballast water filled in the first to third columns 160, 170, 180 and the tower support column TSC may be different from each other in order to control COD (co-directional wave, current, and wind). For example, the amount of ballast water filled in the columns adjacent to the tower support column TSC may be less. In other words, the amount of ballast water filled in the columns adjacent to the tower support column TSC among the first to third columns 160, 170, 180 may be less than the amount of ballast water filled in the other columns.

[0155] FIG. 26 is a perspective view for explaining a floating marine structure according to still another embodiment of the present invention, and FIG. 27 is a plan view of the floating marine structure shown in FIG.

[0156] 26 and 27, the floating offshore structure FOS may include a tower TW, a number of columns 160, 170, 180, TSC, and a number of braces 310, 320, 330, 340, 350, 360.

[0157] The multiple columns 160, 170, 180, TSC may support a superstructure, for example, a power generation structure PGS. The multiple columns 160, 170, 180, TSC may include first to third columns 160, 170, 180 and a tower support column TSC. A cross section parallel to the seawater level of the first to third columns 160, 170, 180 and the tower support column TSC may have various shapes, such as a circle or a polygon. For example, a cross section parallel to the seawater level of the first to third columns 160, 170, 180 and the tower support column TSC may have a circular shape.

[0158] The first to third columns 160, 170, and 180 may be disposed outside the tower support column TSC. For example, the first to third columns 160, 170, and 180 may be disposed to correspond to the vertices of a polygon, for example, a triangle.

[0159] The tower TW, nacelle NC, and blades BL of the power generation structure PGS may be installed on the tower support column TSC. The tower support column TSC may be equal to or greater than the height of the first to third columns 160, 170, and 180.

[0160] The tower support column TSC may be provided inside a polygon formed by the first to third columns 160, 170, and 180. For example, the tower support column TSC may be provided at a position offset to one side from the center of the triangle formed by the first to third columns 160, 170, and 180.

[0161] Meanwhile, the inside of the first to third columns 160, 170, 180 and the tower support column TSC may be filled with ballast water. Here, since the tower support column TSC is installed at a position other than the center of the polygon formed by the first to third columns 160, 170, 180, the amount of ballast water filled in the first to third columns 160, 170, 180 and the tower support column TSC may be different from each other in order to control COD (co-directional wave, current, and wind). For example, the amount of ballast water filled in the column adjacent to the tower support column TSC may be less. That is, the amount of ballast water filled in the column adjacent to the tower support column TSC among the first to third columns 160, 170, 180 may be less than the amount of ballast water filled in the other columns.

[0162] The plurality of braces 310, 320, 330, 340, 350, 360 may include upper braces 310, 320, 330 and lower braces 340, 350, 360.

[0163] The upper braces 310, 320, and 330 can connect the upper ends of the first to third columns 160, 170, and 180 to the upper end of the tower support column TSC.

[0164] The lower braces 340, 350, 360 can connect the lower ends of the first to third columns 160, 170, 180 to the lower end of the tower support column TSC.

[0165] The upper braces 310, 320, 330 may include first to third upper braces 310, 320, 330. The first upper brace 310 may connect the upper end of the first column 160 to the upper end of the tower support column TSC. The second upper brace 320 may connect the upper end of the second column 170 to the upper end of the tower support column TSC. The third upper brace 330 may connect the upper end of the third column 180 to the upper end of the tower support column TSC. Here, at least one of the first to third upper braces 310, 320, 330 may have a different length from the rest. For example, the length of the first and third upper braces 310, 330 may be shorter than the length of the second upper brace 320.

[0166] The lower braces 340, 350, 360 may include first to third lower braces 340, 350, 360. The first lower brace 340 may connect the lower end of the first column 160 to the lower end of the tower support column TSC. The second lower brace 350 may connect the lower end of the second column 170 to the lower end of the tower support column TSC. The third lower brace 360 ​​may connect the lower end of the third column 180 to the lower end of the tower support column TSC. Here, at least one of the first to third lower braces 340, 350, 360 may have a different length from the rest. For example, the length of the first and third lower braces 340, 360 may be shorter than the length of the second lower brace 350.

[0167] Additionally, the length of the first and third lower braces 340, 360 may be the same as the length of the first and third upper braces 310, 330. The length of the second upper brace 320 may be the same as the length of the second lower brace 350.

[0168] Meanwhile, the tower support column TSC may be provided at a position eccentric to one side of the inside of the polygon formed by the first to third columns 160, 170, and 180 from the center of the polygon.

[0169] The location of the tower support column TSC is described in more detail below.

[0170] When the floating offshore structure FOS comes alongside a quay QW, two of the first to third columns 160, 170, 180 may be provided adjacent to the quay QW. For example, the first and third columns 160, 180 may be provided adjacent to the quay QW, and the second column 170 may be provided away from the quay QW.

[0171] The length of the second upper brace 320 and the second lower brace 350 connecting the second column 170 and the tower support column TSC may be longer than the length of the first and third lower braces 340, 360 and the first and third upper braces 310, 330 connecting the first and third columns 160, 180 and the tower support column TSC.

[0172] Also, the second upper brace 320 and the second lower brace 350 may have a shape extending in a direction perpendicular to the wharf wall QW.

[0173] Therefore, the tower support column TSC can be deflected from the center of the triangle formed by the first to third columns 160, 170, 180 toward the quay wall QW on an extension line of the second upper brace 320 and the second lower brace 350.

[0174] As described above, when the tower support column TSC is deflected toward the quay wall, the distance between the quay wall QW and the power generation structure PGS can be reduced, which makes it easier to operate equipment such as a crane installed adjacent to the quay wall QW.

[0175] FIG. 28 is a perspective view for explaining a floating marine structure according to still another embodiment of the present invention, and FIG. 29 is a plan view of the floating marine structure shown in FIG.

[0176] 28 and 29, the floating offshore structure FOS may include a tower TW, a number of columns 160, 170, 180, TSC, and a number of braces 310, 320, 330, 340, 350, 360.

[0177] The multiple columns 160, 170, 180, TSC may support a superstructure, for example, a power generation structure PGS. The multiple columns 160, 170, 180, TSC may include first to third columns 160, 170, 180 and a tower support column TSC. A cross section parallel to the seawater level of the first to third columns 160, 170, 180 and the tower support column TSC may have various shapes, such as a circle or a polygon. For example, a cross section parallel to the seawater level of the first to third columns 160, 170, 180 and the tower support column TSC may have a circular shape.

[0178] The first to third columns 160, 170, and 180 may be disposed outside the tower support column TSC. For example, the first to third columns 160, 170, and 180 may be disposed to correspond to the vertices of a polygon, for example, a triangle.

[0179] The tower TW, nacelle NC, and blades BL of the power generation structure PGS may be installed on the tower support column TSC. The tower support column TSC may be equal to or greater than the height of the first to third columns 160, 170, and 180.

[0180] The tower support column TSC may be provided inside a polygon formed by the first to third columns 160, 170, and 180. For example, the tower support column TSC may be provided at a position offset to one side from the center of the triangle formed by the first to third columns 160, 170, and 180.

[0181] Meanwhile, the inside of the first to third columns 160, 170, 180 and the tower support column TSC may be filled with ballast water. Here, since the tower support column TSC is installed at a position other than the center of the polygon formed by the first to third columns 160, 170, 180, the amount of ballast water filled in the first to third columns 160, 170, 180 and the tower support column TSC may be different from each other in order to control COD (co-directional wave, current, and wind). For example, the amount of ballast water filled in the column adjacent to the tower support column TSC may be less. That is, the amount of ballast water filled in the column adjacent to the tower support column TSC among the first to third columns 160, 170, 180 may be less than the amount of ballast water filled in the other columns.

[0182] The plurality of braces 310, 320, 330, 340, 350, 360 may include upper braces 310, 320, 330 and lower braces 340, 350, 360.

[0183] The upper braces 310, 320, and 330 can connect the upper ends of the first to third columns 160, 170, and 180 to the upper end of the tower support column TSC.

[0184] The lower braces 340, 350, 360 can connect the lower ends of the first to third columns 160, 170, 180 to the lower end of the tower support column TSC.

[0185] The upper braces 310, 320, 330 may include first to third upper braces 310, 320, 330. The first upper brace 310 may connect the upper end of the first column 160 to the upper end of the tower support column TSC. The second upper brace 320 may connect the upper end of the second column 170 to the upper end of the tower support column TSC. The third upper brace 330 may connect the upper end of the third column 180 to the upper end of the tower support column TSC. Here, at least one of the first to third upper braces 310, 320, 330 may have a different length from the rest. For example, the length of the first upper brace 310 may be shorter than the lengths of the second and third upper braces 320, 330.

[0186] The lower braces 340, 350, 360 may include first to third lower braces 340, 350, 360. The first lower brace 340 may connect the lower end of the first column 160 to the lower end of the tower support column TSC. The second lower brace 350 may connect the lower end of the second column 170 to the lower end of the tower support column TSC. The third lower brace 360 ​​may connect the lower end of the third column 180 to the lower end of the tower support column TSC. Here, at least one of the first to third lower braces 340, 350, 360 may have a different length from the rest. For example, the length of the first lower brace 340 may be shorter than the lengths of the second and third lower braces 350, 360.

[0187] Additionally, the length of the first lower braces 340, 360 may be the same as the length of the first upper brace 310. The length of the second and third upper braces 320, 330 may be the same as the length of the second and third lower braces 350, 360.

[0188] Meanwhile, the tower support column TSC may be provided at a position eccentric to one side of the inside of the polygon formed by the first to third columns 160, 170, and 180 from the center of the polygon.

[0189] The position of the center column CC will be explained in more detail below.

[0190] When the floating offshore structure FOS comes alongside a quay QW, two of the first to third columns 160, 170, 180 may be provided adjacent to the quay QW. For example, the first and third columns 160, 180 may be provided adjacent to the quay QW, and the second column 170 may be provided away from the quay QW.

[0191] The length of the first upper brace 310 and the first lower brace 340 connecting the first column 160 and the tower support column TSC may be shorter than the length of the second and third upper braces 320, 330 and the second and third lower braces 350, 360 connecting the second and third columns 170, 180 and the tower support column TSC.

[0192] Therefore, the tower support column TSC can be deflected in a direction adjacent to the first column 160 from the center of the triangle formed by the first to third columns 160, 170, and 180.

[0193] That is, the tower support column TSC can be deflected adjacent to the wharf QW from the center of the triangle formed by the first to third columns 160, 170, and 180.

[0194] As described above, when the tower support column TSC is deflected toward the quay wall, the distance between the quay wall QW and the power generation structure PGS can be reduced, which makes it easier to operate equipment such as a crane installed adjacent to the quay wall QW.

[0195] In addition to the above-described embodiments, the present invention can include all embodiments that arise from a combination of at least two or more of the above-described embodiments or a combination of at least one or more of the above-described embodiments with known technology.

[0196] The present invention has been described in detail above through specific examples. However, these are for the purpose of specifically explaining the present invention, and the present invention is not limited thereto. It is clear that modifications and improvements can be made by those having ordinary skill in the art within the technical spirit of the present invention.

[0197] Any simple modifications or variations of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

Claims

1. A plurality of columns, a center column arranged in a polygonal shape formed by the plurality of columns, and a plurality of first reinforcing members arranged between each of the plurality of columns and the center column to connect each of the plurality of columns and the center column comprising a floating offshore structure, wherein the plurality of first reinforcing members form a region connected to the center column, and an area of a cross section of the region is larger than an area of a cross section of the center column.

2. The floating offshore structure according to claim 1, further comprising a plurality of first buoyancy bodies installed at lower ends of each of the plurality of columns.

3. The floating offshore structure according to claim 1, wherein the plurality of first reinforcing members surround the center column and cover the center column.

4. The floating offshore structure according to claim 3, wherein an area of a cross section of a region where the plurality of first reinforcing members cover the center column is larger than an area of a cross section of the center column.

5. The floating offshore structure according to claim 4, wherein a region where the plurality of first reinforcing members cover the center column has a polygonal shape.

6. The floating offshore structure according to claim 2, wherein the center column further comprises a second buoyancy body installed at a lower end of the center column.

7. The floating offshore structure according to claim 6, further comprising a plurality of second reinforcing members arranged between the plurality of columns, the first buoyancy bodies, and the second buoyancy body at a position lower than the plurality of first reinforcing members to connect each of the plurality of first buoyancy bodies and the second buoyancy body.

8. The floating offshore structure according to claim 1, wherein the center column has a circular cross section.

9. The floating offshore structure according to claim 1, wherein each of the plurality of columns has a polygonal cross section.

10. The floating offshore structure according to claim 1, wherein each of the plurality of first buoyancy bodies has a polygonal cross section.

11. The floating offshore structure according to claim 1, wherein the plurality of first reinforcing members are arranged on a plane parallel to the sea surface.

12. The floating offshore structure according to claim 6, wherein the plurality of second reinforcing members are arranged on a plane parallel to the sea surface.

13. A floating offshore power generation device comprising the floating offshore structure according to any one of claims 1 to 12, and a power generation structure installed on the floating offshore structure. ​

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