A convenient test platform for realizing offshore floating wind power foundation structure wind tunnel test in a building wind tunnel

Abstract

The application discloses a convenient test platform for realizing offshore floating wind power foundation structure wind tunnel test in a building wind tunnel, which comprises a supporting base assembly, a controllable magnetic force fixing assembly, a platform plate assembly and a cylindrical enclosure. The supporting base assembly is used for supporting the platform plate assembly above the original ground of the building wind tunnel, so that the platform plate assembly forms a simulated wind tunnel ground; the platform plate assembly is provided with a test hole at the center of a building wind tunnel turntable; the cylindrical enclosure is communicated with the test hole and forms a containing space for containing the underwater part of a foundation structure model; and the controllable magnetic force fixing assembly is used for detachably fixing the supporting base to the original ground of the building wind tunnel. By adjusting the height of the supporting base, different water draft conditions can be adapted; by cooperation of the test hole and the cylindrical enclosure, the direct wind influence on the underwater part of the model can be reduced. The platform does not need to destroy the original wind tunnel structure, is convenient to install, disassemble and reuse, and is suitable for wind tunnel test of wind power foundation structure in upright, inclined and different wind direction angle conditions.

Description

Technical Field

[0001] This invention relates to wind tunnel testing equipment for offshore floating wind power foundation structures, and more particularly to a convenient testing platform for conducting wind tunnel tests on offshore floating wind power foundation structures in a building wind tunnel. Background Technology

[0002] While the wind load on offshore floating wind turbine foundations is relatively small compared to wave loads, the large distance between the point of action and the waterline generates a significant overturning moment, which has a substantial impact on platform stability. To provide reliable wind load data for offshore floating wind turbine foundations, wind tunnel testing is often necessary. Whether in towing or in-situ operation, offshore floating wind turbine foundations may be subjected to wind from any direction and tilt. To simulate this actual situation in wind tunnel testing, it is necessary to simulate wind loads not only when the foundation is upright but also when it is tilted. Furthermore, the draft of the offshore floating wind turbine foundation differs between operating and towing conditions, resulting in inconsistent wind-affected areas and wind loads, necessitating simulation testing in wind tunnels. Because architectural wind tunnels do not need to consider the relative changes in the height of the building above the ground (similar to changes in the draft of a foundation structure), the test turntables of architectural wind tunnels do not have a large circular hole reserved to meet the requirements of foundation structure testing, taking into account the draft changes of offshore floating wind turbine foundation structures. Instead, they only have a small hole reserved for installing wiring for measuring balances and pressure gauges. This hole is too small to meet the requirements of wind tunnel tests on foundation structure models at a standard scale. Actual engineering design and basic research require extensive wind tunnel model tests of offshore floating wind turbine foundation structures. Currently, there are few dedicated wind tunnel testing facilities that can meet the simulation requirements of floating wind turbine foundation structures under different drafts and tilt conditions, making it difficult to meet the testing needs of numerous engineering designs and basic research projects. Therefore, it is necessary to utilize existing architectural wind tunnels to conduct relevant wind tunnel model tests. In wind tunnel construction, while the problem of small pre-drilled holes can be solved by using multiple models (one model per draft, resulting in a relatively small number of models) for cases where the foundation structure model is upright, the problem of small pre-drilled holes can also be solved by using multiple models for cases where the foundation structure model is tilted. However, each tilted state and each wind direction angle requires a separate model, which multiplies the number of models. In addition, each model needs to be installed and disassembled. Furthermore, during the installation and disassembly of the models, the small torque range of the force balance can easily lead to overload and damage to the balance. Therefore, conducting wind tunnel model tests of offshore floating wind power foundation structures in building wind tunnels is currently costly, risky, and inefficient. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings in the aforementioned background technology and provide a convenient test platform for conducting wind tunnel tests on floating offshore wind power foundation structures in a building wind tunnel. This platform constructs a height-adjustable simulated wind tunnel ground above the original ground of the building wind tunnel, and sets test holes connected to cylindrical enclosure components at the center of the corresponding wind tunnel turntable, providing accommodation space for the underwater part of the floating wind power foundation structure model, thereby completing multi-condition wind tunnel tests without damaging the original building wind tunnel structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A convenient test platform for wind tunnel testing of offshore floating wind power foundation structures in a building wind tunnel includes a support base assembly, a controllable magnetic fixing assembly, a platform plate assembly, and a cylindrical enclosure component. The support base assembly includes multiple support bases spaced apart on the original ground of the building wind tunnel. The support bases are used to support the platform plate assembly above the original ground of the building wind tunnel, so that the platform plate assembly forms a simulated wind tunnel ground that is higher than the original ground of the building wind tunnel. The controllable magnetic fixing component is used to detachably fix the support base to the original ground of the building wind tunnel; The platform plate assembly is formed by splicing together multiple platform plates, and a test hole is formed at the center of the corresponding building wind tunnel turntable to accommodate the underwater part of the offshore floating wind power foundation structure model. The cylindrical enclosure is disposed at the test hole, and the inner space of the cylindrical enclosure is connected to the test hole to form a receiving space below the ground of the simulated wind tunnel for accommodating the underwater part. The support height of the support base is adjustable, so as to adapt to different draft conditions of the offshore floating wind power foundation structure model by adjusting the height of the simulated wind tunnel ground relative to the original ground of the building wind tunnel.

[0005] Furthermore, the cylindrical enclosure is located at the center of the building wind tunnel turntable, and the inner diameter edge of the cylindrical enclosure corresponds to the inner diameter edge of the test hole, so that the test hole and the cylindrical enclosure together form a relatively closed model housing space in the horizontal direction.

[0006] Furthermore, the support base includes a base plate, a vertical support rod, a support plate, and a height adjustment component. The vertical support rod is disposed between the base plate and the support plate. The platform plate assembly is supported on the support plate. The height adjustment component is used to adjust the height of the support plate relative to the base plate.

[0007] Furthermore, the vertical support rod is a threaded support rod, and the height adjustment component includes a nut that mates with the threaded support rod, thereby changing the vertical position of the support plate by rotating the nut.

[0008] Furthermore, the support base also includes a stabilizing rib plate, which is connected between the base plate and the vertical support rod to improve the support base's resistance to lateral disturbances.

[0009] Furthermore, the controllable magnetic fixing assembly includes multiple controllable magnetic magnets, which have a magnetic open state and a magnetic closed state. In the magnetic open state, the controllable magnetic magnets attract and fix the corresponding support base to the original ground of the building wind tunnel. In the magnetic closed state, the support base can be moved or removed relative to the original ground of the building wind tunnel.

[0010] Furthermore, the platform plate assembly includes several standard platform plates and several processed platform plates. The processed platform plates are plates formed by cutting the platform plates according to the boundary of the building wind tunnel test area, the position of the wind tunnel turntable, and the size of the test hole. The several standard platform plates and several processed platform plates are spliced ​​together to form a simulated wind tunnel ground that matches the building wind tunnel test area.

[0011] Furthermore, the platform plate assembly is provided with a connection hole corresponding to the support base, and the fastener fixes the platform plate assembly to the support plate of the corresponding support base through the connection hole.

[0012] Furthermore, the cylindrical enclosure is a circular ring formed by enclosing plates. The circular ring is used to define the containment area of ​​the underwater part of the offshore floating wind power foundation structure model and reduce the direct impact of external flow on the underwater part during wind tunnel testing.

[0013] A wind tunnel testing method for offshore floating wind power foundation structures based on any of the convenient testing platforms described above includes the following steps: Based on the dimensions of the building wind tunnel test area and the draft conditions of the offshore floating wind power foundation structure model, the splicing dimensions of the platform plate components, the location of the test holes, and the arrangement of the support base are determined. The cylindrical enclosure is placed at the center of the building wind tunnel turntable, and the cylindrical enclosure is aligned with the test hole; Multiple support bases are arranged on the existing ground of the building wind tunnel, and the support bases are fixed by a controllable magnetic fixing component, and the support height of the support bases is adjusted. The platform plate assembly is installed on the support base, so that the platform plate assembly forms a simulated wind tunnel ground that is higher than the original ground of the building wind tunnel; The underwater portion of the offshore floating wind power foundation structure model is placed within the containment space formed by the test hole and the cylindrical enclosure, and a wind tunnel test is conducted on the simulated wind tunnel surface.

[0014] The beneficial effects of this invention are: First, the present invention raises the platform plate assembly by supporting the base, forming a simulated wind tunnel ground above the original ground of the building wind tunnel, and sets test holes in the simulated wind tunnel ground, so that the building wind tunnel can adapt to the space requirements of the underwater part of the offshore floating wind power foundation structure model.

[0015] Secondly, by adjusting the height of the support base, the present invention can change the height of the simulated wind tunnel ground, thereby adapting to different draft conditions and reducing the need to make separate models for different draft conditions.

[0016] Third, the present invention forms a model housing space by combining the test hole with the cylindrical enclosure, so that the underwater part of the model is located below the ground of the simulated wind tunnel, which helps to reduce the impact of the underwater part being directly exposed to wind on the test results and improves the consistency between the wind tunnel test conditions and the actual wind conditions of the project.

[0017] Fourth, the platform plate assembly, support base, and cylindrical enclosure of the present invention are all detachable, adjustable, and reusable. The support base is fixed by a controllable magnetic fixing component, which does not cause any damage to the original wind tunnel structure. It can improve the efficiency of test preparation and reduce the test cost. It is suitable for a series of wind tunnel tests on offshore floating wind power foundation structures with different drafts, different inclination attitudes, and different wind direction angles. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the planar structure of a convenient test platform for wind tunnel testing of a floating offshore wind power foundation structure according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the elevation structure of a convenient test platform for wind tunnel testing of a floating offshore wind power foundation structure according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the fixing and support of the support base according to an embodiment of the present invention.

[0021] In the diagram: 1. Support base; 2. Circular cylinder; 3. Standard platform plate; 4. Machining platform plate; 5. Fastener; 6. Magnetic controllable magnet; 7. Base plate; 8. Stabilizing rib plate; 9. Threaded support rod; 10. Support plate. Detailed Implementation

[0022] The embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the following embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Where there is no conflict, the technical features in the following embodiments can be combined with each other.

[0023] In the description of this invention, "multiple" refers to two or more; directional terms such as "upper," "lower," "inner," "outer," and "center" are used to describe the orientation shown in the accompanying drawings or the usual usage state, and are only used to facilitate the explanation of the structural relationship of this invention, and do not constitute a limitation on the scope of protection of this invention.

[0024] The original ground of the building wind tunnel was ferromagnetic. In this embodiment, the fastener is specifically a nut.

[0025] Reference Figures 1-3 This embodiment provides a convenient test platform for wind tunnel testing of offshore floating wind power foundation structures in a building wind tunnel. The convenient test platform includes 40 support bases 1, a circular cylinder 2, 20 platform plates, and 80 controllable magnetic magnets 6. The 20 platform plates include 18 standard platform plates 3 and 2 processed platform plates 4. The standard platform plates 3 can be directly laid out and used, such as... Figure 1 As shown, the processing platform plate 4 is cut according to the boundary of the wind tunnel test area, the center position of the turntable and the position of the test hole. After the 20 platform plates are spliced ​​together, a rectangular plane platform is formed. This rectangular plane platform is used as a simulated wind tunnel ground that is higher than the original ground of the building wind tunnel.

[0026] Forty support bases 1 are spaced apart on the existing ground of the wind tunnel to support 20 platform panels. Each platform panel is supported by two support bases 1. Each support base 1 includes a base plate 7, a stabilizing rib 8, a threaded support rod 9, a nut, and a support plate 10. The base plate 7 is in contact with the existing ground of the wind tunnel. One end of the threaded support rod 9 is fixed to the base plate 7. The support plate 10 is located on the upper end of the threaded support rod 9 and is used to support the platform panel. The stabilizing rib 8 connects the base plate 7 and the threaded support rod 9 to improve the stability of the support base 1.

[0027] In this embodiment, the height of the support plate 10 can be adjusted by a nut that mates with the threaded support rod 9. When the nut is rotated, the support plate 10 moves up and down relative to the base plate 7, thereby causing the corresponding platform plate to move up and down as a whole. In this way, the height of the simulated wind tunnel ground can be adjusted according to the draft of the offshore floating wind power foundation structure model, so that the relative position between the model's waterline and the simulated wind tunnel ground meets the experimental requirements.

[0028] A test hole is set at the center of the corresponding building wind tunnel turntable in the platform plate assembly. The size of the test hole is determined according to the underwater dimensions, tilt attitude variation range, and wind direction angle variation requirements of the offshore floating wind power foundation structure model. The annular cylinder 2 is set at the center of the building wind tunnel turntable, and the inner diameter edge of the annular cylinder 2 corresponds to the inner diameter edge of the test hole, so that the inner space of the annular cylinder 2 is connected to the test hole, thereby forming a model housing space for accommodating the underwater part of the model.

[0029] During wind tunnel testing, the underwater portion of the offshore floating wind turbine foundation model extends into the model's containment space formed by the test borehole and the annular cylinder 2. The wind-receiving portion of the model above the waterline is located above the simulated wind tunnel surface. Because the annular cylinder 2 provides circumferential protection for the underwater portion of the model, and this underwater portion is located below the simulated wind tunnel surface, the direct impact of the wind tunnel's incoming airflow on the underwater portion of the model is reduced. This allows the measured wind load to primarily reflect the wind characteristics of the above-water portion of the foundation structure, thus more closely approximating the wind conditions of an actual offshore floating wind turbine foundation structure.

[0030] A controllable magnetic magnet 6 is used to detachably fix the support base 1 to the existing ground of the wind tunnel. Each support base 1 is equipped with two controllable magnetic magnets 5. The controllable magnetic magnet 6 has a magnetically on state and a magnetically off state. When the controllable magnetic magnet 6 is in the magnetically on state, it exerts an adsorption and fixing effect on the support base 1 and the existing ground of the wind tunnel, keeping the support base 1 stable during the test. When the controllable magnetic magnet 6 is in the magnetically off state, the support base 1 can be moved relative to the existing ground of the wind tunnel to adjust the support position, rearrange the platform, or complete disassembly. Thus, the convenient test platform can be installed, adjusted, and dismantled without damaging the existing ground of the wind tunnel.

[0031] The convenient testing platform in this embodiment can be used in the following manner: First, based on the dimensions of the building wind tunnel test section, the center position of the building wind tunnel turntable, the dimensions of the offshore floating wind power foundation structure model, and the target draft conditions, the splicing range of the platform plate components, the diameter of the test hole, the installation position of the annular cylinder 2, and the arrangement position of the multiple support bases 1 are determined.

[0032] Next, place the annular cylinder 2 at the center of the building wind tunnel turntable, and make the inner space of the annular cylinder 2 correspond to the position of the test hole to be formed.

[0033] Next, multiple support bases 1 are placed on the existing ground of the wind tunnel and temporarily fixed with magnetically controllable magnets 6. The support height of each support base 1 is adjusted according to the target draft conditions so that the subsequently installed platform plate assembly can form a simulated wind tunnel ground of a predetermined height.

[0034] Subsequently, the standard platform plate 3 and the processing platform plate 4 are laid sequentially on the support base 1, and the platform plates are fixed to the support plates 10 of the corresponding support base 1 with nuts. After the laying is completed, the multiple platform plates together form a rectangular simulated wind tunnel ground, and a test hole is formed at the center of the building wind tunnel turntable.

[0035] Finally, the offshore floating wind power foundation model is installed on the wind tunnel turntable or force measurement system, so that the underwater part of the model is located within the model housing space formed by the test hole and the annular cylinder 2. By adjusting the model's attitude, the turntable angle, and the height of the support base 1, wind tunnel tests can be conducted under different drafts, different inclination states, and different wind directions.

[0036] When it is necessary to change the location of the test platform, change the platform height, or dismantle the test platform, the controllable magnetic magnet 6 can be switched to the magnetic off state to release the support base 1 from its fixed position. Then, the support base 1, platform plate assembly, and annular cylinder 2 can be adjusted or removed. Since the entire process does not require drilling, welding, or bonding to the original ground of the wind tunnel, it can reduce damage to the wind tunnel facilities and improve the platform's reusability.

[0037] The above embodiments are merely specific examples of the present invention. Those skilled in the art can make equivalent substitutions or appropriate modifications to the specific structure of the support base, the material of the platform plate, the shape of the cylindrical enclosure, the arrangement of the fixing components, and the height adjustment method without departing from the concept of the present invention, and such substitutions or modifications should all fall within the protection scope of the present invention.

Claims

1. A convenient test platform for conducting wind tunnel tests of offshore floating wind power foundation structures in a building wind tunnel, characterized in that, Includes a support base assembly, a controllable magnetic fixing assembly, a platform plate assembly, and a cylindrical enclosure component; The support base assembly includes multiple support bases spaced apart on the original ground of the building wind tunnel. The support bases are used to support the platform plate assembly above the original ground of the building wind tunnel, so that the platform plate assembly forms a simulated wind tunnel ground that is higher than the original ground of the building wind tunnel. The controllable magnetic fixing component is used to detachably fix the support base to the original ground of the building wind tunnel; The platform plate assembly is formed by splicing together multiple platform plates, and a test hole is formed at the center of the corresponding building wind tunnel turntable to accommodate the underwater part of the offshore floating wind power foundation structure model. The cylindrical enclosure is disposed at the test hole, and the inner space of the cylindrical enclosure is connected to the test hole to form a receiving space below the ground of the simulated wind tunnel for accommodating the underwater part. The support height of the support base is adjustable, so as to adapt to different draft conditions of the offshore floating wind power foundation structure model by adjusting the height of the simulated wind tunnel ground relative to the original ground of the building wind tunnel.

2. The convenient testing platform according to claim 1, characterized in that, The cylindrical enclosure is located at the center of the building wind tunnel turntable, and the inner diameter edge of the cylindrical enclosure corresponds to the inner diameter edge of the test hole, so that the test hole and the cylindrical enclosure together form a relatively closed model housing space in the horizontal direction.

3. The convenient testing platform according to claim 1, characterized in that, The support base includes a base plate, a vertical support rod, a support plate, and a height adjustment component. The vertical support rod is disposed between the base plate and the support plate. The platform plate assembly is supported on the support plate. The height adjustment component is used to adjust the height of the support plate relative to the base plate.

4. The convenient testing platform according to claim 3, characterized in that, The vertical support rod is a threaded support rod, and the height adjustment component includes a nut that mates with the threaded support rod. The vertical position of the support plate can be changed by rotating the nut.

5. The convenient testing platform according to claim 3, characterized in that, The support base also includes a stabilizing rib plate, which is connected between the base plate and the vertical support rod to improve the support base's resistance to lateral disturbances.

6. The convenient testing platform according to claim 1, characterized in that, The controllable magnetic fixing assembly includes multiple controllable magnetic magnets, which have a magnetic open state and a magnetic closed state; in the magnetic open state, the controllable magnetic magnets attract and fix the corresponding support base to the original ground of the building wind tunnel. In the magnetically deactivated state, the support base can be moved or removed relative to the original ground of the building wind tunnel.

7. The convenient testing platform according to claim 1, characterized in that, The platform plate assembly includes several standard platform plates and several processed platform plates. The processed platform plates are plates formed by cutting the platform plates according to the boundary of the building wind tunnel test area, the position of the wind tunnel turntable, and the size of the test hole. The several standard platform plates and several processed platform plates are spliced ​​together to form a simulated wind tunnel ground that matches the building wind tunnel test area.

8. The convenient testing platform according to claim 1, characterized in that, The platform plate assembly is provided with a connection hole corresponding to the support base, and the fastener fixes the platform plate assembly to the support plate of the corresponding support base through the connection hole.

9. The convenient testing platform according to claim 1, characterized in that, The cylindrical enclosure is a ring cylinder, which is formed by enclosing plates. The ring cylinder is used to define the containment area of ​​the underwater part of the offshore floating wind power foundation structure model and reduce the direct effect of external flow on the underwater part during wind tunnel testing.

10. A wind tunnel testing method for offshore floating wind power foundation structures based on the convenient test platform described in any one of claims 1 to 9, characterized in that, Includes the following steps: Based on the dimensions of the building wind tunnel test area and the draft conditions of the offshore floating wind power foundation structure model, the splicing dimensions of the platform plate components, the location of the test holes, and the arrangement of the support base are determined. The cylindrical enclosure is placed at the center of the building wind tunnel turntable, and the cylindrical enclosure is aligned with the test hole; Multiple support bases are arranged on the existing ground of the building wind tunnel, and the support bases are fixed by a controllable magnetic fixing component, and the support height of the support bases is adjusted. The platform plate assembly is installed on the support base, so that the platform plate assembly forms a simulated wind tunnel ground that is higher than the original ground of the building wind tunnel; The underwater portion of the offshore floating wind power foundation structure model is placed within the containment space formed by the test hole and the cylindrical enclosure, and a wind tunnel test is conducted on the simulated wind tunnel surface.

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