Mixed type floating fan foundation with berthing structure

Abstract

The invention discloses a hybrid floating fan foundation with a berthing structure, and relates to the technical field of ocean engineering. Comprising a central stand column, a forward side column, a first lateral side column and a second lateral side column, the forward side column, the first lateral side column and the second lateral side column are arranged on the periphery of the central stand column at an included angle of 120 degrees, and the top of the central stand column, the top of the forward side column, the top of the first lateral side column and the top of the second lateral side column are connected through a first supporting frame body; a berthing point is arranged on the first supporting frame body; the middle of the central stand column is connected with the bottoms of the forward side column, the first lateral side column and the second lateral side column through a second supporting frame body. The floating type draught fan foundation has better hydrodynamic performance, when the floating type draught fan foundation faces wind wave flow environment loads, the motion response of swaying of the floating type draught fan foundation can be remarkably reduced, and the motion response is limited within a smaller range.

Description

Technical Field

[0001] The invention relates to the technical field of marine engineering, and in particular to a hybrid floating wind turbine foundation with a berthing structure. Background Art

[0002] At present, offshore wind power, as a key path for my country to achieve carbon neutrality and carbon peak goals, is ushering in a period of rapid development. Relying on my country's 18,000-kilometer coastline and vast offshore wind energy resources, especially the rich available wind energy resources in the deep and deep seas, an area of ​​more than three million square kilometers, it provides unique conditions for the large-scale development of offshore wind power. Because the deep and deep seas are far away from human activity areas, they are less concerned about human activity interference factors such as noise, providing an ideal environment for the deployment of high-power wind turbines and showing great application potential. However, in the process of promoting deep and deep sea wind power projects, how to ensure system stability and improve survivability in extreme weather such as typhoons has become a technical problem that needs to be solved urgently. The foundation design of offshore wind turbines suitable for deep and deep seas is of great significance for the efficient use of offshore wind resources and the expansion of the application market.

[0003] The hybrid floating offshore wind turbine platform and its composite side column design disclosed in patent document CN113619742A cleverly combine the advantages of a column platform (Spar) and a semi-submersible platform (Semisubmersible), which not only enhances the buoyancy and stability of the platform, but also optimizes the convenience of installation and transportation, and is particularly suitable for deep-sea wind power operation environments. Despite this, the platform still has room for further optimization in terms of hydrodynamic performance and operation and maintenance efficiency. Specifically, improving the hydrodynamic performance aims to reduce the swaying motion of the platform caused by wind, waves and currents, and ensure the stable operation of the platform under complex sea conditions. At the same time, a reasonable design of the operation and maintenance plan can more effectively meet the maintenance needs of the hybrid offshore wind turbine platform, thereby further improving the safety, endurance and overall performance of the platform. Summary of the invention

[0004] The object of the present invention is to provide a hybrid floating wind turbine foundation with a berthing structure, which is convenient for operation and maintenance activities and berthing, and has better structural stability and hydrodynamic performance.

[0005] To achieve the above-mentioned purpose, the technical solution of the present application is: a hybrid floating wind turbine foundation with a berthing structure, comprising a central column, a front side column, a first lateral side column and a second lateral side column, wherein the front side column, the first lateral side column and the second lateral side column are arranged at an angle of 120° on the periphery of the central column, the top of the central column, the top of the front side column, the top of the first lateral side column and the top of the second lateral side column are connected by a first support frame, and a berthing point is provided on the first support frame; the middle part of the central column is connected to the bottom of the front side column, the first lateral side column and the second lateral side column through a second support frame.

[0006] In one of the embodiments, a heave damping plate is provided at the bottom of the central column.

[0007] In one embodiment, the first support frame includes a tripod formed by connecting outer cross braces end to end in sequence, the corners of the tripod are respectively located on the front side column, the first lateral side column and the second lateral side column, and an inner cross brace is provided between each corner and the central column, and a connecting cross brace is provided between the middle part of the outer cross brace and the central column.

[0008] In one embodiment, a berthing point is provided on one of the outer cross braces.

[0009] In one of the embodiments, two corners of the tripod are connected to the first lateral side column and the second lateral side column respectively through a transverse bracing folding beam.

[0010] In one embodiment, the second support frame includes a steel buoy and a hollow steel bar, and the steel buoy is closely attached to both sides of the hollow steel bar.

[0011] In one embodiment, a reinforcing cross brace is provided between the middle portions of two adjacent second support frames.

[0012] In one embodiment, a T-shaped diagonal brace is provided between the central column and the front side column, the first lateral side column, and the second lateral side column. The first end of the T-shaped diagonal brace is connected to the top of the central column, the second end is connected to the middle of the central column, and the third end is connected to the bottom of the corresponding side column.

[0013] In one embodiment, the high end of the cross bracing folding beam is connected to the corner of the tripod, and the low end is connected to the corresponding lateral side column.

[0014] In one embodiment, the first support frame, the second support frame, the T-shaped diagonal brace, the central column, the front side column, the first lateral side column, and the second lateral side column are connected by threads or welding.

[0015] By adopting the above technical scheme, the present invention can achieve the following technical effects: the floating wind turbine foundation designed by the present invention has better hydrodynamic performance, and when facing the wind, wave and current environmental load, its swaying motion response can be significantly reduced, and the motion response is limited to a smaller range; at the same time, the remaining space designed on the upper part of the floating wind turbine foundation can enable the operation and maintenance ship to berth safely and reliably; the connection design of the beam structure enables the platform to be modularly manufactured, which greatly saves construction time and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the hybrid floating wind turbine foundation structure for designing the berthing structure;

[0018] Figure 2 Side view of the hybrid floating wind turbine foundation designed for berthing structure;

[0019] Figure 3 Top view of the hybrid floating wind turbine foundation for the design of berthing structure;

[0020] Explanation of the serial numbers in the figure: 1. Inner cross brace; 2. Positive side column; 3. Heave damping plate; 4. Second supporting frame; 5. Cross brace folded beam; 6. T-shaped diagonal brace; 7. Outer cross brace; 8. Connecting cross brace; 9. Reinforcement cross brace; 10. Center column; 11. Tripod; 12. First lateral side column; 13. Berthing point. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0024] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] The present invention makes targeted improvements to the hybrid floating offshore wind turbine platform disclosed in patent document CN113619742A. Figure 1-3 The present embodiment provides a hybrid floating wind turbine foundation with a berthing structure, comprising a central column, a positive side column, a first lateral side column and a second lateral side column, wherein the central column comprises a first cylinder and a second cylinder, wherein the diameter of the first cylinder is smaller than that of the second cylinder, thereby lowering the center of gravity of the entire floating wind turbine foundation and improving the stability of the floating wind turbine foundation under wind, wave and current loads; the positive side column, the first lateral side column and the second lateral side column are arranged at an angle of 120° on the periphery of the central column to provide buoyancy and stability for the floating wind turbine foundation; the top of the first cylinder, the top of the positive side column, the top of the first lateral side column and the top of the second lateral side column are connected through a first support frame, and a berthing point is provided on the first support frame; the top of the second cylinder is connected to the bottom of the positive side column, the first lateral side column and the second lateral side column through the second support frame.

[0027] In this embodiment, a heave damping plate is provided at the bottom of the central column, so that the floating foundation has greater vertical damping and reduces the vertical motion response of the floating foundation.

[0028] In this embodiment, the first support frame includes a tripod formed by connecting the outer cross braces end to end in sequence, the corners of the tripod are respectively located on the positive side column, the first lateral side column and the second lateral side column, and an inner cross brace is provided between each corner and the central column, and a connecting cross brace is provided between the middle of the outer cross brace and the central column. While ensuring the stability of the top structure of the floating foundation, the load on the platform is dispersed to reduce the impact of load, fatigue, etc. on the operation of the wind turbine.

[0029] In this embodiment, a berthing point is provided on one of the outer cross braces, and the operation and maintenance vessel can be berthed at the floating foundation when the floating wind turbine is in place, so that maintenance personnel can carry out maintenance and inspection work.

[0030] In this embodiment, two corners of the tripod are connected to the first lateral side column and the second lateral side column respectively through a transverse bracing folded beam. The transverse bracing folded beam plays the role of strengthening the corners to ensure good mechanical properties between the first support frame and the side columns.

[0031] In this embodiment, the second support frame includes a steel buoy and a hollow steel bar, and the steel buoy is closely attached to both sides of the hollow steel bar. The connection point of the second support frame is set below the waterline, and the composite structure has better hydrodynamic performance, ensuring the integrity of the load transfer of the underwater connection part.

[0032] In this embodiment, a reinforced cross brace is provided between the middle parts of two adjacent second support frames, thereby ensuring the structural strength of the underwater part of the floating wind turbine foundation under the action of waves and currents; the reinforced cross brace enables the second support frames below the waterline to form a stable triangular structure, thereby improving the hydrodynamic performance of the floating foundation, reducing the roll and pitch movements of the wind turbine foundation, and increasing the safety and reliability of the floating foundation.

[0033] In this embodiment, a T-shaped diagonal brace is further provided between the central column and the positive side column, the first lateral side column, and the second lateral side column. The first end of the T-shaped diagonal brace is connected to the top of the central column, the second end is connected to the middle of the central column, and the third end is connected to the bottom of the corresponding side column. The diagonal brace design strengthens the structural stability between the central column and the side columns, so that the floating wind turbine foundation has better hydrodynamic and mechanical properties.

[0034] In this embodiment, the first support frame, the second support frame, the T-shaped diagonal brace and the central column, the front side column, the first lateral side column, and the second lateral side column are connected by threads or welding; this connection form facilitates the modular construction and installation of the floating foundation, greatly saving construction costs.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hybrid floating wind turbine foundation with a berthing structure, characterized in that: It includes a central column, a front side column, a first lateral side column and a second lateral side column. The front side column, the first lateral side column and the second lateral side column are arranged on the periphery of the central column at an angle of 120°. The top of the central column, the top of the front side column, the top of the first lateral side column and the top of the second lateral side column are connected through a first support frame, and a docking point is provided on the first support frame; the middle part of the central column is connected to the bottom of the front side column, the first lateral side column and the second lateral side column through a second support frame.

2. A hybrid floating wind turbine foundation with a berthing structure according to claim 1, characterized in that: A heave damping plate is arranged at the bottom of the central column.

3. A hybrid floating wind turbine foundation with a berthing structure according to claim 1, characterized in that: The first support frame body includes a tripod formed by connecting outer cross braces end to end in sequence, the corners of the tripod are respectively located on the front side column, the first lateral side column and the second lateral side column, and an inner cross brace is provided between each corner and the central column, and a connecting cross brace is provided between the middle part of the outer cross brace and the central column.

4. A hybrid floating wind turbine foundation with a berthing structure according to claim 3, characterized in that: There is a berthing point on one of the outer cross braces.

5. A hybrid floating wind turbine foundation with a berthing structure according to claim 3, characterized in that: Two corners of the tripod are connected to the first lateral side column and the second lateral side column respectively through a transverse bracing folding beam.

6. A hybrid floating wind turbine foundation with a berthing structure according to claim 1, characterized in that: The second supporting frame includes a steel buoy and a hollow steel bar, and the steel buoy is closely attached to both sides of the hollow steel bar.

7. The hybrid floating wind turbine foundation with a berthing structure according to claim 1, characterized in that: A reinforcing cross brace is provided between the middle parts of two adjacent second support frames.

8. The hybrid floating wind turbine foundation with a berthing structure according to claim 1, characterized in that: A T-shaped diagonal brace is also provided between the central column and the positive side column, the first lateral side column, and the second lateral side column. The first end of the T-shaped diagonal brace is connected to the top of the central column, the second end is connected to the middle of the central column, and the third end is connected to the bottom of the corresponding side column.

9. A hybrid floating wind turbine foundation with a berthing structure according to claim 5, characterized in that: The high end of the cross bracing folding beam is connected to the corner of the tripod, and the low end is connected to the corresponding lateral side column.

10. A hybrid floating wind turbine foundation with a berthing structure according to claim 8, characterized in that: The first support frame, the second support frame, the T-shaped diagonal brace, the central column, the front side column, the first lateral side column, and the second lateral side column are connected by threads or welding.

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