Floating type wind turbine foundation cabin damage water tank model test device and method

Abstract

The application discloses a floating wind turbine foundation cabin damage water tank model test device and method, and belongs to the field of wind turbine foundation structure design and monitoring operation and maintenance. The floating wind turbine foundation cabin damage water tank model test device comprises a water tank, a wave making device, a wave dissipation grid, a wave height instrument, a tension sensor, a six-axis sensor, a pressure suction cup, a high-speed camera, a floating wind turbine model and a mooring rope. The two ends of the tension sensor are connected with a fairlead and the mooring rope respectively, and the tension sensor is used for measuring the tension change of the mooring rope in the movement of the floating wind turbine. The top end of the six-axis sensor is connected with a wind turbine foundation column, and the six-axis sensor is used for monitoring the movement response of the wind turbine foundation. The application can simulate the process that the floating wind turbine foundation gradually loses stability from the stable state to the state of the cabin being damaged and water entering the foundation by changing the position of the damaged foundation cabin, and can complete the stability performance test, the movement characteristics and the tension monitoring of the mooring rope of the floating wind turbine foundation under different cabin damage conditions, thereby providing a theoretical basis and technical support for the design and monitoring operation and maintenance of the floating wind turbine foundation structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the offshore wind power technology field, and particularly to a floating wind turbine foundation cabin damage water tank model test device and method. BACKGROUND

[0002] Energy crisis is increasingly prominent, and wind energy, as a recyclable clean energy, has attracted widespread attention. With the development of offshore wind power, deep-sea and floating wind turbine foundation has become a research focus. The deep-sea environment is complex and changeable, and the floating wind turbine is obviously affected by environmental loads such as wind, wave and current. Therefore, it is crucial to study the stability and hydrodynamic performance of the wind turbine foundation to improve the operational safety of the floating wind turbine. Cabin damage is one of the main reasons for the failure of the floating wind turbine, and in severe cases, it may even lead to the danger of overturning of the floating wind turbine. Therefore, before the floating wind turbine is put into operation again, a model test needs to be carried out, and advanced water tank model test technology can accurately predict the hydrodynamic performance of the floating wind turbine in real sea conditions.

[0003] The existing floating wind turbine test device and method mainly study the motion response state of the floating wind turbine in the intact state, and it is difficult to study the stability of the floating wind turbine foundation and the hydrodynamic performance of the wind turbine foundation in the damaged cabin state, which brings great difficulties to the design and monitoring and operation of the deep-sea floating wind turbine structure. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a floating wind turbine foundation cabin damage water tank model test device and method, which can simulate the process of the floating wind turbine foundation from stability to gradual instability after the cabin is damaged and flooded, complete the stability performance test, motion characteristics and mooring cable tension monitoring of the floating wind turbine foundation under different cabin damage conditions, and provide theoretical basis and technical support for the design and monitoring and operation of the floating wind turbine foundation structure.

[0005] To achieve the above purpose, the present application adopts the following technical scheme: a floating wind turbine foundation cabin damage water tank model test device, comprising: a water tank (1), a wave making device (2), a wave absorbing grid (3), a wave height instrument (4), a tension sensor (5), a six-axis sensor (6), a pressure suction cup (7), a high-speed camera (8), a floating wind turbine model (9), and a mooring cable (10);

[0006] The water tank (1) is divided into a middle wave tank wall section, a middle wave tank wall section and a tail end concrete section. The head end concrete section is provided with the wave making device (2) and the wave height instrument (4), the middle wave tank wall section is provided with the wave height instrument (4), and the tail end concrete section is provided with the wave absorbing grid (3);

[0007] The floating wind turbine model (9) comprises a mooring system, a foundation structure and an upper structure, the upper structure and the foundation structure are fixedly connected, and the connection part of the upper structure and the foundation structure is sealed and waterproof treated;

[0008] The two ends of the tension sensor (5) are connected with the fairlead (14) and the mooring cable (10) respectively, and are used for measuring the tension change of the mooring cable in the movement of the floating wind turbine;

[0009] The six-axis sensor (6) is connected with the top end of the wind turbine foundation A column (15), and is used for monitoring the movement response of the wind turbine foundation;

[0010] The tension sensor (5) is connected with the eight-channel sensor (12), the eight-channel sensor (12) and the six-axis sensor (5) are connected with the computer (13), the collected tension information and movement information are sent to the computer (13), and each wave height instrument (4) sends the collected information to the wave height collection box (22);

[0011] The foundation structure is calibrated by using a red line at the waterline (18);

[0012] The high-speed camera (8) is aligned with the floating wind turbine model (9).

[0013] In a preferred embodiment, the mooring system is a tension mooring, which is composed of a pressure suction cup (7), a mooring cable (10) and a spring (11), the pressure suction cup (7) is arranged on the glass wall surface on both sides of the middle wave trough wall section in the water tank (1), the pressure suction cup (7) is connected with the end of the spring (11), and the first end of the spring (11) is connected with the mooring cable (10).

[0014] In a preferred embodiment, the foundation structure is composed of three longitudinal large-scale cylindrical members A column, B column and C column and two transverse connecting members upper deck column (23) and lower floating column (24); the bottom of the foundation A column (15) is provided with a bottom floating cylinder (25), and the upper part of the B column (16) has a tower cylinder connecting transition section (26).

[0015] In a preferred embodiment, the foundation structure is hollow and is divided into a plurality of cabins and is integrally made by 3D printing, and the material is photosensitive resin; the top end of the foundation A column (15) and the foundation C column (17) is detachably covered (21), the top end of the foundation B column (16) is hollow, the tower cylinder (19) is directly inserted into the inside of the foundation B column (16) and is detachable, and the counterweight of the floating wind turbine and the cleaning after the cabin is flooded are facilitated.

[0016] The application further provides a floating wind turbine foundation cabin damage water tank model test method, and the floating wind turbine foundation cabin damage water tank model test device is used.

[0017] Step S1: according to the geometric, motion and dynamic similarity principle, a floating wind turbine model is made by using dimensional analysis method and scale conversion combined with the wave tank size;

[0018] Step S2: the damaged cabin position is processed according to the required test damage condition;

[0019] Step S3: the water tank is filled with water to the design water level, and then the wind turbine foundation model is put in, and the foundation water level is observed;

[0020] Step S4: the counterweight bag is added to the column, the column is covered and the upper structure is added, the float is added to the bottom of the column with insufficient buoyancy to balance the additional weight, the weight of the counterweight bag is repeatedly adjusted to make the overall water level of the foundation reach the red line calibration position, and the waterproof treatment is performed on the connection part between the overall balanced model and the upper component;

[0021] Step S5: the model test point is calibrated, the wind turbine foundation model is arranged to the calibration position, and the exposed chip of the motion sensor at the top of the foundation A column is waterproofed and the tension sensor is reinforced after being connected with the motion sensor and the tension sensor;

[0022] Step S6: the tension sensor measuring cable tension is opened, and the cable pre-tension is adjusted by controlling the spring tightness;

[0023] Step S7: the motion sensor is opened to measure the foundation displacement and angle change, after the floating wind turbine model and the water surface state reach a stable state, the initial data value is cleared, and the motion sensor, the tension sensor and the wave height instrument data are recorded;

[0024] Step S8: the design wave parameters are input to the upper computer, after the push plate is restored to the predetermined position, the wave is generated and the high-speed camera is started, the motion characteristics of the floating wind turbine after the cabin is flooded are observed and recorded, and when the wave period is not less than 60, the collection is stopped and the wave is stopped;

[0025] Step S9: the damaged cabin position in step S2 is changed, steps S3 to S8 are repeated, and the floating wind turbine tank test under different cabin damages under regular wave and irregular wave is completed.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] 1. The motion response characteristics of the floating wind turbine model under different cabin damages can be accurately recorded by the high-speed camera;

[0028] 2. The motion sensor and tension sensor can accurately collect the six-degree-of-freedom motion of the floating wind turbine foundation model and the tension of the mooring cable under different cabin damage conditions, and can effectively restore the motion response of the floating wind turbine foundation under instability conditions.

[0029] 3. The water inside the foundation after cabin damage can be easily cleaned by opening the detachable cover, the test can be repeated multiple times more efficiently, and after the integrated cabin printing, the next cabin damage test condition test can be performed after the previous working condition damage is filled and waterproofed, the model utilization rate is high, and the economy is good. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a floating wind turbine foundation cabin damage water tank model test device schematic diagram of the embodiment of the application.

[0031] Figure 2 It is Figure 1 The left view (without lines).

[0032] Figure 3 It is a floating wind turbine model schematic diagram of the embodiment of the application.

[0033] Figure 4 It is a foundation cabin division diagram of the embodiment of the application.

[0034] Figure 5 It is a cover and tower transition section schematic diagram of the embodiment of the application.

[0035] In the figure: water tank 1, wave making device 2, wave absorbing grid 3, wave height instrument 4, tension sensor 5, six-axis sensor 6, pressure suction cup 7, high-speed camera 8, floating wind turbine model 9, mooring cable 10, spring 11, eight-channel sensor 12, computer 13, fairlead 14, foundation A column 15, foundation B column 16, foundation C column 17, waterline 18, tower 19, cabin and blade 20, cover 21, wave height collection box 22, deck column 23, float column 24, buoy 25, tower connection transition section 26, cabin damage 27. DETAILED DESCRIPTION

[0036] The application will be further described below in conjunction with the drawings and embodiments.

[0037] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] like Figures 1-5 As shown, this embodiment provides a test device for a floating wind turbine foundation chamber damaged water tank model, including: water tank 1, wave generator 2, wave-dissipating grid 3, wave height meter 4, tension sensor 5, six-axis sensor 6, pressure suction cup 7, high-speed camera 8, floating wind turbine model 9, mooring cable 10;

[0040] In this embodiment, the water tank 1 is divided into 3 sections. The first concrete section is equipped with a wave-generating device 2 and a wave height meter 4. The middle wave tank wall section is equipped with a wave height meter 4. The last concrete section is equipped with a wave-dissipating grid 3.

[0041] In this embodiment, the floating wind turbine model includes a mooring system, a base structure, and a superstructure. The superstructure and the base structure are fixedly connected, and the connection is sealed and waterproofed.

[0042] In this embodiment, the two ends of the tension sensor 5 are connected to the wind turbine foundation and the mooring cable 10, respectively, and are used to measure the change in tension generated by the mooring cable during the movement of the floating wind turbine.

[0043] In this embodiment, the six-axis sensor 6 is connected to the top of the A-column 15 of the wind turbine foundation and is used to monitor the motion response of the wind turbine foundation;

[0044] In this embodiment, the tension sensor 5 is connected to the eight-channel sensor 12, the eight-channel sensor 12 and the six-axis sensor 6 are connected to the computer, and the collected tension information and motion information are sent to the computer 13. Each wave height meter 4 sends the collected information to the wave height acquisition box 22.

[0045] In this embodiment, the waterline 18 of the basic structure is marked with a red line, and the high-speed camera 8 is aimed at the floating wind turbine model 9.

[0046] In this embodiment, the mooring system consists of a pressure suction cup 7, a mooring cable 10, and a spring 11. The pressure suction cup 7 is arranged on the glass wall on both sides of the wave channel wall section in the middle of the water tank 1. The pressure suction cup 7 is connected to the end of the spring 11, and the head of the spring 11 is connected to the mooring cable 10.

[0047] In the embodiment, the basic structure is composed of three longitudinal large-scale cylindrical members A column 15, B column 16 and C column 17 and two transverse connecting members upper deck column 23 and lower floating column 24; the bottom of the A column 15 is provided with a bottom float 25, and the upper part of the B column 16 has a tower cylinder connecting transition section 26;

[0048] In the embodiment, the inside of the basic structure is hollow and divided into several cabins, which are integrally made by 3D printing, and the material is photosensitive resin; the top of the basic A column 15 and the basic C column 17 is detachable cover 21, the top of the B column 16 is hollow, the tower cylinder connecting transition section 26 is directly inserted into the inside of the B column and is detachable, which is convenient for the counterweight of the floating wind turbine and the cleaning after the cabin is flooded;

[0049] According to the above device design, the working principle of the floating wind turbine foundation cabin damage water tank model test system is as follows:

[0050] Specifically, the embodiment also provides a floating wind turbine foundation cabin damage water tank model test method, which comprises the following steps:

[0051] Step S1: according to the size of the wave tank, using the dimensional analysis method, the scale ratio conversion is carried out according to the geometric, motion and dynamic similarity principles, and the floating wind turbine model is made;

[0052] Step S2: according to the damage condition of the cabin to be tested, the damage of the cabin is processed at the waterline position of the corresponding cabin of the basic structure;

[0053] Step S3: after the water tank is filled with water to the designed water level, the wind turbine foundation model is put in, and the foundation water level is observed preliminarily;

[0054] Step S4: adding counterweight bags, covers and upper structures into the stand column, and adding floats to balance the additional weight at the bottom of the column with insufficient buoyancy, repeatedly adjusting the weight of the counterweight bags to make the overall water level of the foundation reach the red line calibration position, and carrying out waterproof treatment on the connection part between the overall model and the upper member after balancing;

[0055] Step S5: calibrating the model test points, arranging the wind turbine foundation model to the calibration position, connecting with the motion sensor and the tension sensor, and carrying out waterproof treatment on the exposed chip of the six-axis motion sensor at the top of the A column and reinforcing treatment on the tension sensor;

[0056] Step S6: opening the tension sensor to measure the cable tension, and adjusting the cable pretension by controlling the tightness of the spring;

[0057] Step S7: opening the motion sensor to measure the foundation displacement and angle change, resetting the initial data value after the floating wind turbine model and the water surface state reach a stable state, and starting to record the data of the motion sensor, the tension sensor and the wave height instrument;

[0058] Step S8: input the design wave parameters on the host computer, and start wave making and open the high-speed camera after the push plate returns to the predetermined position. Observe and record the movement characteristics of the floating wind turbine after the cabin is flooded. Stop collecting and stop wave making when the wave period is not less than 60.

[0059] Step S9: change the position of the cabin damage in step S2, repeat steps S3 to S8, and complete the floating wind turbine tank test under different cabin damages under regular and irregular waves.

[0060] Further, the method of the embodiment only needs to change the position of the cabin damage in step S2 when simulating the floating wind turbine under different cabin damages. After waterproofing the previous damage, repeat steps S3 to S8 to obtain the movement response and mooring cable tension change of the floating wind turbine model under different cabin damages.

[0061] The above is only a preferred embodiment of the present application, and is not intended to limit the other forms of the present application. Any person skilled in the art can use the disclosed technical content to make changes or modifications to equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments without departing from the technical solution of the present application, according to the technical essence of the present application, still belongs to the protection scope of the present application.

[0062] The present application is not limited to the above best embodiment, and anyone can derive other various forms of floating wind turbine foundation cabin damage tank model test device and method based on the disclosure of the present application. Any equivalent change and modification made within the scope of the present application shall be covered by the present application.

Claims

1. A test method for a floating wind turbine foundation nacelle damage tank model, characterized in that, A floating wind turbine foundation compartment damage water tank model test device is adopted, which includes: water tank (1), wave generator (2), wave-dissipating grid (3), wave height meter (4), tension sensor (5), six-axis sensor (6), pressure suction cup (7), high-speed camera (8), floating wind turbine model (9), and mooring cable (10). The water tank (1) is divided into a front concrete section, a middle wave trough wall section and a rear concrete section. The front concrete section is equipped with a wave-generating device (2) and a wave height meter (4). The middle wave trough wall section is equipped with a wave height meter (4). The rear concrete section is equipped with a wave-dissipating grid (3). The floating wind turbine model (9) includes a mooring system, a foundation structure and a superstructure, and the connection between the superstructure and the foundation structure is sealed and waterproofed. The mooring system is a tension mooring system, consisting of a pressure suction cup (7), a mooring cable (10) and a spring (11). The pressure suction cup (7) is arranged on the glass wall on both sides of the wave channel wall section in the middle of the water tank (1). The pressure suction cup (7) is connected to the end of the spring (11), and the head of the spring (11) is connected to the mooring cable (10). The basic structure consists of three longitudinal large-scale cylindrical components: foundation A column (15), foundation B column (16), and foundation C column (17), as well as two transverse connecting components: upper deck column (23) and lower floating column (24). The bottom of foundation A column (15) is provided with a bottom floating cylinder (25), and the upper part of foundation B column (16) has a tower connecting transition section (26). The superstructure includes a tower (19), a nacelle, and blades (20). The basic structure is hollow inside and divided into several compartments. It is made in one piece by 3D printing and the material is photosensitive resin. The top of the foundation A column (15) and foundation C column (17) is a detachable cover (21). The top of the foundation B column (16) is hollow. The tower (19) is directly inserted into the foundation B column (16) and is detachable, which facilitates the counterweight of the floating wind turbine model (9) and the cleaning of the compartment after water enters. The two ends of the tension sensor (5) are connected to the foundation structure and the mooring cable (10) respectively, and are used to measure the change in tension generated by the mooring cable during the movement of the floating wind turbine model; The six-axis sensor (6) is connected to the top of the A-column (15) of the wind turbine foundation and is used to monitor the motion response of the wind turbine foundation; The tension sensor (5) is connected to the eight-channel sensor (12), and the eight-channel sensor (12) and the six-axis sensor (6) are connected to the computer (13). The collected tension information and motion information are sent to the computer (13), and each wave height meter (4) sends the collected information to the wave height acquisition box. The waterline (18) of the basic structure is marked with a red line; The high-speed camera (8) is aimed at the floating wind turbine model (9); Includes the following steps: Step S1: Based on the dimensions of the water tank, use dimensional analysis to perform scale conversion according to the principles of geometric, kinematic and dynamic similarity, and create a floating fan model. Step S2: Based on the required breaching conditions for the test, breach the corresponding compartments of the basic structure at the waterline position. Step S3: After filling the water tank to the designed water level, place the foundation structure in the tank and observe the water level of the foundation structure. Step S4: Add counterweight bags, covers and superstructure to the column. Add floats (25) to the bottom of the column where the buoyancy is insufficient to balance the extra weight. Repeatedly adjust the weight of the counterweight bags so that the overall draft of the basic structure reaches the red line mark position. Waterproof the connection between the balanced basic structure and the superstructure. Step S5: The test points of the model are calibrated, the floating wind turbine model is placed at the calibrated position, and after connecting with the six-axis sensor (6) and the tension sensor, the exposed chip of the six-axis sensor (6) at the top of the foundation A column is waterproofed and the tension sensor is reinforced. Step S6: Turn on the tension sensor to measure the tension of the mooring cable, and adjust the pretension of the mooring cable by controlling the spring tension; Step S7: Turn on the six-axis sensor (6) to measure the displacement and angle changes of the foundation structure. After the floating wind turbine model and the water surface state reach a stable state, clear the initial data value and start recording the data of the six-axis sensor (6), tension sensor and wave height meter. Step S8: Input the design wave parameters into the host computer. After the wave-making device (2) is restored to the predetermined position, start wave-making and turn on the high-speed camera to observe and record the motion characteristics of the floating wind turbine model after the cabin is flooded. Stop collecting data and stop wave-making when the wave period is not less than 60. Step S9: Change the location of the compartment damage in step S2, and repeat steps S3 to S8 to complete the water tank model test of different compartment damage under the action of regular and irregular waves.

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