Local structure arrangement for stress distribution and strength improvement of tension leg-type floating offshore wind platform

Abstract

The present invention relates to a local structure arrangement for stress distribution and strength improvement of a tension leg-type floating offshore wind platform, wherein a plurality of support pieces, at least one of which extends in a different direction, protrude from the bottom plate of a node so that the top plate of the node, to which a load is applied by a wind turbine, is supported by each support piece to distribute stress and prevent damage to the top plate, thereby enabling the wind turbine to be stably supported by means of the node.

Description

Local structural arrangement for stress distribution and strength enhancement of tensile-type floating offshore wind power platforms

[0001] The present invention relates to an offshore wind power platform, and more particularly, to a local structure arrangement for stress distribution and strength enhancement of a tensile angle-type floating offshore wind power platform, in which the upper plate of a node supporting a wind turbine is supported by a plurality of support pieces arranged in a leaf-like shape, so that when a load is applied to the upper plate of the node by the wind turbine, stress is distributed by each support piece, thereby preventing damage to the upper plate, thereby stably supporting the wind turbine through the node.

[0002] As environmental pollution caused by fossil fuel use becomes more serious, eco-friendly renewable energy is attracting attention.

[0003] Eco-friendly renewable energies are not only clean and indefinite, but also have the advantage of being pollution-free and renewable, so their scope of application is gradually expanding.

[0004] Meanwhile, there is wind energy, which uses wind turbines, as one type of eco-friendly renewable energy.

[0005] At this time, wind turbines are mounted on vertical towers, and electricity can be generated as the turbines rotate due to the wind.

[0006] However, the turbines that make up wind power generators are quite large, so they require a relatively large installation space, which poses a problem of restrictions on installation locations.

[0007] And when the wind turbine rotates, it generates a lot of noise, which causes complaints from neighbors.

[0008] To solve these problems, the use of 'offshore wind turbines', such as those disclosed in Korean Patent Publication No. 10-2023-0026975, is increasing.

[0009] Offshore wind turbines are installed in the sea away from residential areas, making it easy to secure space and free from complaints about noise.

[0010] In such offshore wind turbines, the tower is typically installed on a floating platform comprising a plurality of radially arranged pontoons and nodes connected to each of the pontoons, more specifically, installed at the center of the top plate of a node.

[0011] Therefore, since a load of several tons or even tens of tons is applied to the top plate of the node, there was a problem that if the node itself was weak, the tower support could become unstable, which could easily lead to a major accident.

[0012] For the above reasons, the field is attempting to develop an offshore wind power platform that can support wind turbines stably through nodes by smoothly distributing stress when a load is applied to the node's top plate due to a wind turbine, thereby preventing damage to the top plate. However, satisfactory results have not been achieved to date.

[0013] [Prior Art Literature]

[0014] [Patent Document]

[0015] (Patent Document 1) Republic of Korea Publication No. 10-2023-0026975

[0016] The present invention has been proposed to solve the problems of the prior art as described above, and its purpose is to provide an offshore wind power platform that enables stable support of the wind turbine through the node by smoothly distributing stress when a load is applied to the upper plate of the node due to the wind turbine, thereby preventing damage to the upper plate.

[0017] In order to achieve the above purpose, the present invention,

[0018] The present invention proposes a local structure arrangement for stress distribution and strength enhancement of a tensile-angled floating offshore wind power platform, comprising: a node providing a wind turbine mounting surface through a top plate, wherein a first flat surface is formed in one direction, a second flat surface is formed in another direction, and a third flat surface is formed in yet another direction; and a plurality of pontoons connected to the node and exerting buoyancy in the sea, each of the pontoons connected to the first flat surface, the second flat surface, and the third flat surface of the node and extending in three directions; wherein the node includes a plurality of support pieces that protrude upward from a lower plate arranged at a gap below the top plate, at least one of which extends in a different direction; wherein the top plate is supported by each of the support pieces, thereby distributing stress generated in response to a load applied to the top plate by the wind turbine.

[0019] The local structure arrangement for stress distribution and strength enhancement of a tensile angle-shaped floating offshore wind power platform according to the present invention is such that a plurality of support pieces, at least one of which extends in different directions, are protruded and formed on the lower plate of a node, so that the upper plate of the node, to which a load is applied by a wind turbine, can be supported by each support piece, so that stress distribution is achieved by each support piece, and damage to the upper plate is prevented, thereby stably supporting the wind turbine through the node.

[0020] The local structure arrangement for stress distribution and strength enhancement of a tensile-angled floating offshore wind power platform according to the present invention comprises: a plurality of first support pieces extending horizontally from a first flat surface of a node, with one of the first support pieces spaced apart from the other; a plurality of second support pieces extending downwardly from a second flat surface of the node toward the first support piece, with one of the second support pieces spaced apart from the other; and a plurality of third support pieces extending upwardly from a third flat surface of the node toward the first support piece, with one of the third support pieces spaced apart from the other; wherein the stress can be more smoothly distributed in multiple directions by the first, second, and third support pieces extending in different directions to form a leaf vein-like shape.

[0021] In addition, the local structure arrangement for stress distribution and strength enhancement of the tensile angle-type floating offshore wind power platform according to the present invention is such that each support piece of the node is vertically connected, thereby preventing interference between each other, making installation easy and increasing overall workability. In addition, since curved sections are excluded from the entire section of each support piece, straightening work is unnecessary, reducing manufacturing costs. In addition, the structural stability can be further enhanced by making it easy to add reinforcing materials according to the level of structural stress at the point of connection with each flat surface.

[0022] Figure 1 is a perspective view of an offshore wind power platform to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-shaped floating offshore wind power platform according to the present invention is applied.

[0023] FIG. 2 is a partially disassembled perspective view of a node in an offshore wind power platform to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-shaped floating offshore wind power platform according to the present invention is applied.

[0024] FIG. 3 is a one-way cross-sectional view of a node in an offshore wind power platform to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-type floating offshore wind power platform according to the present invention is applied.

[0025] FIG. 4 is an exemplary diagram showing another arrangement form of support pieces of nodes in an offshore wind power platform to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-type floating offshore wind power platform according to the present invention is applied.

[0026] FIG. 5 is an exemplary diagram showing a form in which at least one of the support pieces of a node is formed with a different thickness in an offshore wind power platform to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-shaped floating offshore wind power platform according to the present invention is applied.

[0027] FIG. 6 is an exemplary diagram showing a form in which a protrusion is formed on the end plate of a node in an offshore wind power platform to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-shaped floating offshore wind power platform according to the present invention is applied.

[0028] FIG. 7 is an exemplary diagram showing the arrangement of protrusions formed on a finishing plate forming a node in an offshore wind power platform to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-shaped floating offshore wind power platform according to the present invention is applied.

[0029] Hereinafter, the present invention will be described in detail based on the attached drawings.

[0030]

[0031] As shown in Fig. 1, an offshore wind power platform (A) to which a local structure arrangement for stress distribution and strength enhancement of a tensile angle-shaped floating offshore wind power platform according to the present invention is applied includes a node (100); and a pontoon (200).

[0032] The node (100) of the present invention provides a wind turbine (300) mounting surface through the upper plate (110), wherein a first flat surface (100a) is formed in one direction, a second flat surface (100b) is formed in another direction, and a third flat surface (100c) is formed in yet another direction.

[0033] Therefore, the connection between the node (100) and the pontoon (200) can be made by combining the pontoon (200) described below to each of the first flat surface (100a), the second flat surface (100b), and the third flat surface (100c).

[0034] And the node (100) includes a plurality of support pieces (140) that are formed to protrude upward from a lower plate (120) that is spaced apart from the lower portion of the upper plate (110), with at least one of them extending in a different direction.

[0035] Accordingly, the upper end of each support piece (140) contacts the lower surface of the upper plate (110), so that the upper plate (110) can be supported by each support piece (140), and thus the stress generated in response to the load applied to the upper plate (110) by the wind turbine (300) can be distributed.

[0036] At this time, the support piece (140) includes a plurality of first support pieces (141) extending horizontally from the first flat surface (100a), but having one of them spaced apart from the other; a plurality of second support pieces (142) extending downwardly from the second flat surface (100b) toward the first support piece (141), but having one of them spaced apart from the other; and a plurality of third support pieces (143) extending upwardly from the third flat surface (100c) toward the first support piece (141), but having one of them spaced apart from the other; so that a leaf vein shape is formed by the first support piece (141), the second support piece (142), and the third support piece (143), so that stress generated in response to the load applied to the upper plate (110) can be smoothly distributed in multiple directions.

[0037] Here, each of the first support piece (141), the second support piece (142), and the third support piece (143) may be arranged with equal spacing between one end and the other end in the longitudinal direction of each of the first flat surface (100a), the second flat surface (100b), and the third flat surface (100c), but is not limited thereto.

[0038] That is, each of the first support piece (141), the second support piece (142), and the third support piece (143) can be arranged so that the distance between one and the other narrows from one end of the length direction of each of the first flat surface (100a), the second flat surface (100b), and the third flat surface (100c) toward the middle.

[0039] Accordingly, the center of the upper plate (110) can be particularly firmly supported by the first support piece (141), the second support piece (142), and the third support piece (143).

[0040] In addition, at least one of the first support piece (141), the second support piece (142), and the third support piece (143) is formed with a different thickness, that is, at least one is formed thicker, so that the support of the upper plate (110) can be made more solid.

[0041] In addition, each of the first support piece (141), the second support piece (142), and the third support piece (143) can support the upper plate (110) more widely by forming at least one of the plurality with a different length, that is, forming at least one longer.

[0042] And the node (100) includes a finishing plate (130) extending from the edge of the upper plate (110) to the edge of the lower plate (120).

[0043] Accordingly, not only can the upper plate (110) be supported by the closing plate (130), but also water inflow between the upper plate (110) and the lower plate (120) can be prevented by the closing plate (130).

[0044] At this time, the closing plate (130) includes a plurality of protruding pieces (131) that are formed to protrude from the inner surface, with the upper part contacting the lower surface of the upper plate (110) and the lower part contacting the upper surface of the lower plate (120), so that the upper plate (110) can also be supported by the protruding pieces (131).

[0045] Here, each of the protrusions (131) is arranged between one of the first support pieces (141) and the other, between one of the second support pieces (142) and the other, and between one of the third support pieces (143) and the other, so that interference due to the protrusions (131) coming into contact with the support pieces (140) when the finishing plate (130) is installed can be prevented.

[0046] Meanwhile, in the node (100), the connection between the support piece (140) and the upper plate (110), the connection between the upper plate (110) and the finishing plate (130), and the connection between the lower plate (120) and the finishing plate (130) are achieved by welding, so that not only can the connection between the support piece (140) and the upper plate (110), the connection between the upper plate (110) and the finishing plate (130), and the connection between the lower plate (120) and the finishing plate (130) be stably maintained, but also water inflow through the joining portion can be prevented.

[0047] The pontoon (200) of the present invention is connected to a node (100) to exert buoyancy at sea, and is connected to the first flat surface (100a), the second flat surface (100b), and the third flat surface (100c) of the node (100) and is connected in three directions.

[0048] Accordingly, the offshore installation of the offshore wind power platform (A) to which the local structure arrangement for stress distribution and strength enhancement of the tensile angle-shaped floating offshore wind power platform according to the present invention is applied can be carried out by the pontoon (200) exerting buoyancy at sea.

[0049] A pontoon (200) like this may be of any structure and type as long as it can exert buoyancy at sea, and a detailed description of the pontoon (200) is omitted.

[0050] Meanwhile, the connection of the node (100) of the pontoon (200) may be made by any conventional method as long as the connection state can be firmly maintained, and examples thereof may include a fastening member fastening method or a welding method.

[0051]

[0052] The offshore wind power platform (A) to which the local structural arrangement for stress distribution and strength enhancement of the tensile angle-shaped floating offshore wind power platform according to the present invention is applied can smoothly distribute stress on the upper plate (110) of the node (100). This is described in detail as follows.

[0053] In the present invention, a wind turbine (300) is installed at the center of the upper plate (110) of the node (100).

[0054] At this time, the node (100) has a first flat surface (100a) formed in one direction, a second flat surface (100b) formed in another direction, and a third flat surface (100c) formed in yet another direction. By attaching pontoons (200) to each of the first flat surface (100a), the second flat surface (100b), and the third flat surface (100c), buoyancy can be exerted at sea, so that the wind turbine (300) can be positioned in a floating state at sea.

[0055] However, since the wind turbine (300) is a very large-scale structure with a length and width of several tens of meters, a considerable load is applied to the upper plate (110) of the node (100) that supports it. Therefore, if the stress generated in response to the load is concentrated on a part of the upper plate (110), it may lead to damage to the upper plate (110), and thus the support of the wind turbine (300) may become unstable.

[0056] However, in the present invention, as shown in FIG. 2, a plurality of support pieces (140) are formed protrudingly on the lower plate (120) of the node (100), at least one of which extends in a different direction, so that the upper plate (110) of the node (100) to which the load is applied by the wind turbine (300) is supported by each support piece (140), so that stress is distributed by each support piece (140), and damage to the upper plate (110) is prevented, thereby stably supporting the wind turbine (300) through the node (100).

[0057] At this time, the support piece (140) of the present invention includes, as shown in FIG. 3, a plurality of first support pieces (141) extending horizontally from the first flat surface (100a) of the node (100), but with one of the first support pieces spaced apart from the other; a plurality of second support pieces (142) extending downwardly from the second flat surface (100b) of the node (100) toward the first support piece (141), but with one of the second support pieces spaced apart from the other; And a plurality of third support pieces (143) extending upwardly from the third flat surface (100c) of the node (100) toward the first support piece (141), with one of the third support pieces (143) spaced apart from the other; the first support piece (141), the second support piece (142), and the third support piece (143) extend in different directions to form a leaf vein shape, so that the stress generated in response to the load applied to the upper plate (110) can be more smoothly distributed in multiple directions, so that the support of the wind turbine (300) through the node (100) can be more stably achieved.

[0058] Here, each of the first support piece (141), the second support piece (142), and the third support piece (143) can be arranged so that the distance between one and the other narrows from one end of the length direction of each of the first flat surface (100a), the second flat surface (100b), and the third flat surface (100c), as illustrated in FIG. 4, so that the center of the upper plate (110) can be firmly supported by the first support piece (141), the second support piece (142), and the third support piece (143), thereby further preventing damage to the center of the upper plate (110) where the load of the wind turbine (300) is concentrated.

[0059] In addition, as shown in FIG. 5, each of the first support piece (141), the second support piece (142), and the third support piece (143) may be formed such that at least one of the plurality is formed with a different thickness, that is, at least one is formed thicker, so that the support of the upper plate (110) by the first support piece (141), the second support piece (142), and the third support piece (143) can be made more solid.

[0060] In addition, each of the first support piece (141), the second support piece (142), and the third support piece (143) may have at least one of a plurality formed with a different length, that is, at least one formed longer, so that the upper plate (110) can be supported more widely through the first support piece (141), the second support piece (142), and the third support piece (143).

[0061] In addition, in the present invention, the node (100) includes a finishing plate (130) extending from the edge of the upper plate (110) to the edge of the lower plate (120), so that the upper plate (110) can also be supported by the finishing plate (130).

[0062] At this time, the closing plate (130) includes a plurality of protruding pieces (131) that are formed to protrude from the inner surface as shown in Fig. 6, with the upper part contacting the lower surface of the upper plate (110) and the lower part contacting the upper surface of the lower plate (120); and the upper plate (110) can also be supported by the protruding pieces (131).

[0063] However, as a protrusion (131) is formed on the closing plate (130), interference in the installation of the closing plate (130) may occur due to the protrusion (131).

[0064] That is, when the protruding piece (131) comes into contact with at least one of the first support piece (141), the second support piece (142), and the third support piece (143), the closing plate (130) may be lifted, which may cause difficulties in installation.

[0065] However, in the present invention, each of the protruding pieces (131) is arranged between one of the first support pieces (141) and the other, between one of the second support pieces (142) and the other, and between one of the third support pieces (143) and the other, as shown in FIG. 7, so that interference due to the protruding piece (131) coming into contact with the support piece (140) when the closing plate (130) is installed can be prevented.

[0066]

[0067] The present invention as described above is not limited to the above-described embodiments, and thus may be modified within a scope that does not depart from the gist of the present invention as claimed in the claims, and such modifications are within the scope of protection of the present invention defined by the following claims.

[0068]

[0069] [Explanation of symbols]

[0070] 100: Node 100a: First flat surface

[0071] 100b: Second flat surface 100c: Third flat surface

[0072] 110: Top 120: Bottom

[0073] 130: Finishing plate 131: Protruding plate

[0074] 140: Support 141: First Support

[0075] 142: Second Supporting Part 143: Third Supporting Part

[0076] 200: Pontoon 300: Wind turbine

[0077] A: Offshore wind power platform

[0078] The present invention has industrial applicability in the production of a tensile-angled floating offshore wind power platform, since the upper plate of a node supporting a wind turbine is supported by a plurality of support pieces arranged in a leaf-like shape, so that when a load is applied to the upper plate of the node by the wind turbine, stress is distributed by each support piece, thereby preventing damage to the upper plate, thereby stably supporting the wind turbine through the node.

Claims

1. A node providing a wind turbine mounting surface through a top plate, wherein a first flat surface is formed in one direction, a second flat surface is formed in another direction, and a third flat surface is formed in another direction; and A plurality of pontoons connected to the above node and exerting buoyancy in the sea, and connected to each of the first flat surface, the second flat surface and the third flat surface of the above node and extending in three directions; The above node comprises a plurality of support pieces that protrude upward from a lower plate arranged at intervals below the upper plate, at least one of which extends in a different direction; and the upper plate is supported by each of the support pieces, thereby distributing stress generated in response to a load applied to the upper plate by the wind turbine. A local structure arrangement for stress distribution and strength enhancement of a tensile square floating offshore wind power platform.

2. In paragraph 1, A local structure arrangement for stress distribution and strength enhancement of a tensile-square floating offshore wind power platform, characterized in that the support pieces include: a plurality of first support pieces extending horizontally from the first flat surface, wherein one of the first support pieces is spaced apart from the other; a plurality of second support pieces extending downwardly from the second flat surface toward the first support piece, wherein one of the second support pieces is spaced apart from the other; and a plurality of third support pieces extending upwardly from the third flat surface toward the first support piece, wherein one of the third support pieces is spaced apart from the other.

3. In paragraph 2, A local structural arrangement for stress distribution and strength enhancement of a tensile-angle floating offshore wind power platform, characterized in that each of the first, second, and third support pieces is arranged such that each of the first, second, and third support pieces is oriented from one end of the length direction of each of the first, second, and third flat surfaces to the middle, and the gap between each of them becomes narrower.

4. In paragraph 2, A local structural arrangement for stress distribution and strength enhancement of a tensile-type floating offshore wind power platform, characterized in that each of the first, second and third support pieces is formed with a different thickness among a plurality of pieces.

5. In paragraph 2, A local structural arrangement for stress distribution and strength enhancement of a tensile-type floating offshore wind power platform, characterized in that each of the first, second and third support pieces is formed with a different length among a plurality of pieces.

6. In paragraph 1, A local structural arrangement for stress distribution and strength enhancement of a tensile-type floating offshore wind power platform, characterized in that the above node includes a finishing plate extending from an edge of the upper plate to an edge of the lower plate.

7. In paragraph 6, A local structural arrangement for stress distribution and strength enhancement of a tensile-shaped floating offshore wind power platform, characterized in that the above-mentioned finishing plate includes a plurality of protruding pieces formed by protruding from the inner surface, the upper part of which is in contact with the lower surface of the upper plate, and the lower part of which is in contact with the upper surface of the lower plate.

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