Floating fan multi-degree-of-freedom aerodynamic load simulation device and test method thereof

Abstract

The invention provides a floating fan multi-degree-of-freedom aerodynamic load simulation device and a test method thereof. The floating fan multi-degree-of-freedom aerodynamic load simulation device comprises a cabin, an aerodynamic load generation module, an aerodynamic load control module and a gyroscopic moment generation module, a load generation unit of the aerodynamic load generation module is mounted outside the cabin through a support arm, and the load generation unit is used for generating aerodynamic loads in the length direction and the width direction of the cabin; the gyroscopic moment generation module comprises a motor and a mass rod which are mounted on the cabin, and the motor is used for driving the mass rod to rotate to generate rotational inertia; and the aerodynamic load control module is used for controlling the size of the generated aerodynamic load. According to the method, the accurate simulation of the multi-degree-of-freedom aerodynamic load of the floating fan under various working conditions can be realized without the help of a complex and expensive physical wind field, and the dependence on the physical wind field and model blades is eliminated; the problem that the load applying direction needs to be readjusted under the working conditions of different wind directions and the problem that complex loads under the extreme working conditions and the fault working conditions cannot be accurately simulated are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power, and in particular to a floating wind turbine multi-degree-of-freedom aerodynamic load simulation device and a test method thereof. Background Art

[0002] Floating wind turbine technology is considered a key means to develop deep-sea wind power. However, unlike traditional offshore oil and gas platforms and other structures, the system coupling dynamics of floating wind turbines are more complex, which poses new challenges to design, construction, installation and maintenance. Therefore, it is necessary to conduct a pool model test of floating wind turbines in the early design stage.

[0003] In the floating wind turbine tank model test, accurate simulation of the aerodynamic loads of the floating wind turbine model in various working conditions is very important for correctly evaluating the motion response of the floating body. At present, the aerodynamic load simulation method commonly used in the floating wind turbine tank model test is to set up a physical wind field above the water surface and build a physical wind turbine model according to the Froude number similarity law. In addition, there are also ways to simplify the wind wheel and apply equivalent forces by cables, thrust fans, etc. to replace the physical wind turbine model and physical wind field, or use rotating disks in the wind field to generate thrust and gyroscopic torque to simulate aerodynamic loads.

[0004] However, the above existing technical methods all have their own simplifications and limitations, and cannot truly and completely reflect the aerodynamic loads of floating wind turbines under various working conditions.

[0005] For example, the combination of physical wind field and physical wind turbine model is currently one of the most commonly used and highest fidelity methods in floating wind turbine tank model tests. It can better simulate the main aerodynamic loads under some working conditions, such as the axial thrust of the wind rotor under constant wind speed, while ignoring other minor aerodynamic loads such as aerodynamic torque. In addition, due to the dissimilarity of Reynolds number, it is difficult for model tests to achieve complete similarity with full-scale wind turbines, and the strict weight requirements also limit the feasibility of further adding complex control mechanisms and measurement equipment to simulate and monitor more complex working conditions.

[0006] Simplified methods such as cables and thrust fans further simplify the aerodynamic load simulation. Although they avoid the high cost of building a physical wind field, these methods only consider the equivalence of axial steady thrust and ignore the coupling between aerodynamic loads and floating body motion. They are unable to simulate aerodynamic characteristics such as aerodynamic torque, blade-tower aerodynamic interaction, aerodynamic damping, and gyroscopic effect caused by blade rotation, and can only meet the test verification needs under a very small number of simplified steady conditions.

[0007] Although the rotating disk method in the wind farm supplements the gyroscopic effect, it can only simulate the axial steady thrust in a single direction and cannot fully consider the fluctuation of the aerodynamic load of the floating wind turbine and the characteristic differences under different working conditions.

[0008] Therefore, those skilled in the art are committed to developing a floating wind turbine aerodynamic load simulation device, that is, in a floating wind turbine pool model test, there is no need to set up a physical wind field to avoid the Reynolds number dissimilarity problem, and the device can simulate forces and torques whose magnitudes and directions can be adjusted and controlled in real time within a certain range, thereby accurately and reliably reflecting the various aerodynamic load characteristics of the floating wind turbine in various operating, survival and fault conditions. Summary of the invention

[0009] In view of the defects in the prior art, an object of the present invention is to provide a floating wind turbine multi-degree-of-freedom aerodynamic load simulation device and a test method thereof.

[0010] The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device provided by the present invention comprises a nacelle and an aerodynamic load generation module, an aerodynamic load control module and a gyroscopic moment generation module installed on the nacelle;

[0011] The aerodynamic load generation module includes a support arm and a load generation unit, wherein the load generation unit is installed outside the cabin through the support arm, and the load generation unit is used to generate aerodynamic loads along the length direction and the width direction of the cabin;

[0012] The gyro torque generating module comprises a motor and a mass rod mounted on the nacelle, the mass rod is connected to the output shaft of the motor, and the motor is used to drive the mass rod to rotate and generate rotational inertia;

[0013] The pneumatic load control module is connected to the load generation unit and is used to control the size of the pneumatic load generated by the load generation unit.

[0014] Preferably, the nacelle comprises a nacelle shell, the nacelle shell is a hollow rectangular parallelepiped, and the bottom of the nacelle shell is fixedly mounted on an external tower.

[0015] Preferably, the support arm comprises a first support arm and a second support arm, and the outer ends of the first support arm and the second support arm are both used for installing the load generating unit;

[0016] There are a plurality of first arms, and the plurality of first arms are circumferentially mounted on the outside of the nacelle shell, and the load generating unit on the first arm is used to generate a load along the length direction of the nacelle shell;

[0017] The second arm is a Y-shaped structure, and the two outer ends of the Y-shaped structure are respectively used to install two load generating units. The second arm is symmetrically installed on both sides of the cabin shell, and the load generating units on the second arm are used to generate loads along the width direction of the cabin shell.

[0018] Preferably, the load generating unit comprises a duct fan, and the duct fan is mounted on the outer ends of the first arm and the second arm through a duct fixing member;

[0019] One end of the duct fixing member is installed on the support arm, and the other end of the duct fixing member is an annular fixing structure, and the annular fixing structure is used to clamp the duct fan and is fixedly connected to the duct fan.

[0020] Preferably, the first arm is a hollow truncated cone-shaped vertical metal member, which is fixedly mounted on the outside of the nacelle shell by bolts, and the hollow structure of the first arm is used for passing the cable of the load generating unit;

[0021] The second arm is a hollow Y-shaped metal part, which is fixed to the side of the cabin shell by bolts. The hollow structure of the second arm is used for passing the cable of the load generating unit.

[0022] Preferably, the gyro torque generating module comprises a brushless reduction motor and a plurality of mass rods, wherein the plurality of mass rods are arranged along the circumferential direction and extend along the radial direction of the output shaft of the brushless reduction motor;

[0023] The brushless reduction motor is installed inside the cabin shell, and the mass rod is located at one end of the cabin shell along the length direction.

[0024] Preferably, the gyroscopic torque generating module further comprises a Y-shaped three-way connector

[0025] There are three mass rods, which are respectively connected to three interfaces of the Y-shaped three-way connector and are evenly installed on the output shaft of the brushless reduction motor along the circumferential direction through the Y-shaped three-way connector.

[0026] Preferably, the pneumatic load control module includes an electric control compartment, an electronic speed regulator, a heat sink and a cooling fan;

[0027] The electric regulating compartment is installed inside the nacelle shell, the electronic speed regulator and the heat sink are both installed inside the electric regulating compartment, and the electronic speed regulator is connected to an external computer to adjust the size of the aerodynamic load generated by the load generation unit;

[0028] The heat sink is used to dissipate heat for the electronic speed regulator, the heat dissipation fan is installed on the electronic speed regulator compartment, and the cabin shell is provided with heat dissipation holes corresponding to the heat dissipation fan.

[0029] According to the test method of the floating wind turbine multi-degree-of-freedom aerodynamic load simulation device provided by the present invention, the floating wind turbine multi-degree-of-freedom aerodynamic load simulation device is used, and the test method comprises the following steps:

[0030] Step 1: Adjust the counterweight on the mass rod to adjust the rotational inertia of the gyro torque generating module to a preset target value;

[0031] Step 2: The brushless reduction motor of the gyro torque generating module drives the mass rod to rotate until the rotation speed of the mass rod reaches a preset speed;

[0032] Step 3: The computer starts to perform numerical simulation of the corresponding working conditions to obtain the actual aerodynamic load on the wind turbine unit at each moment, decomposes the load into forces and moments in two perpendicular directions, obtains the model scale corresponding stress and moment after similar scaling using Froude numbers, and solves the aerodynamic loads that need to be generated by the load generation units in the two directions;

[0033] Step 4: The computer sends instructions to the pneumatic load control module at a preset time interval, and the electronic speed regulator in the pneumatic load control module adjusts the speed of the ducted fan in real time after receiving the instructions;

[0034] Step 5: After the simulation is completed, the computer sends an end instruction to the pneumatic load control module and the gyro torque generation module at the same time. The pneumatic load control module controls the pneumatic load generated by the load generation unit to be reduced to 0, and the brushless reduction motor controls the speed of the mass rod to be reduced to 0.

[0035] Preferably, a coordinate system is constructed with the midpoint of the cabin as the origin, the length direction of the shell as the X-axis, the width direction of the cabin shell as the Y-axis, and the height direction of the cabin shell as the Z-axis;

[0036] In the projection along the X-axis direction, four load generating units for generating X-direction aerodynamic loads are respectively arranged in the positive Y direction, negative Y direction, positive Z direction, and negative Z direction of the cabin shell, and two groups of load generating units for generating Y-direction aerodynamic loads are respectively arranged on both sides of the cabin shell along the Y direction.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The present invention provides an aerodynamic load simulation device with a multi-array load active generation unit layout, which can accurately simulate the multi-degree-of-freedom aerodynamic loads of floating wind turbines under various working conditions without the need for complex and expensive physical wind fields, eliminates the dependence of the prior art methods on physical wind fields and model blades, solves the problem that the load application direction needs to be readjusted each time the working condition with a different wind direction is changed, which is cumbersome and inaccurate, and solves the problem that the prior art methods cannot accurately simulate complex loads under extreme working conditions and fault conditions.

[0039] 2. The present invention selects the ducted fan as the active load generating unit and designs corresponding ducted fixings to avoid the air inlet and outlet directions of the ducted fan being blocked, thereby improving the accuracy of load simulation and solving the problem in the prior art methods that the fan array and fan connection method may block the air inlet or outlet directions of the fan.

[0040] 3. The present invention adds a set of gyroscopic torque simulation device on the basis of the active load generation unit array layout. The device uses a set of mass rods to equalize the rotational inertia of the wind turbine model wind wheel, and can simulate the gyroscopic torque exerted on the nacelle by the rotation of the wind wheel through active continuous rotation. This solves the problem of the lack of gyroscopic effect simulation in the prior art.

[0041] 4. The present invention proposes a control system and a control method based on the aerodynamic load simulation device, which independently controls each load active generation unit, and can realize real-time and accurate simulation of aerodynamic loads of different degrees of freedom of the fan under different working conditions, solving the problem that the prior art methods can only simulate steady loads and single-degree-of-freedom loads under some working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0043] Figure 1 It is a schematic diagram of the use scenario of the present invention;

[0044] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0045] Figure 3 It is a structural schematic diagram of the present invention from a front view angle;

[0046] Figure 4 It is a schematic diagram of the structure of the present invention from a side view angle;

[0047] Figure 5 It is a schematic diagram of the internal structure of the cabin shell in the present invention;

[0048] Figure 6 Schematic diagram of output distribution of different ducted fans in the present invention.

[0049] The figure shows:

[0050] Engine room 1 Electric control room 301

[0051] Nacelle shell 100 Electronic speed regulator 302

[0052] Aerodynamic load generation module 2 heat sink 303

[0053] First arm 201 gyro torque generation module 4

[0054] Duct fixing 202 Brushless reduction motor 401

[0055] Second arm 203 Y-shaped three-way connector 402

[0056] Load generating unit 204 Mass rod 403

[0057] Pneumatic Load Control Module 3 DETAILED DESCRIPTION

[0058] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0059] The present invention discloses a floating wind turbine multi-degree-of-freedom aerodynamic load simulation device and a test method thereof. By setting up an aerodynamic load simulation device with a multi-array load active generation unit layout, accurate simulation of the multi-degree-of-freedom aerodynamic loads of the floating wind turbine under various working conditions can be achieved without the need for complex and expensive physical wind fields, thereby eliminating the reliance of the prior art methods on physical wind fields and model blades.

[0060] According to the floating wind turbine multi-degree-of-freedom aerodynamic load simulation device provided by the present invention, Figure 1 As shown, it includes a nacelle 1 and an aerodynamic load generation module 2, an aerodynamic load control module 3 and a gyroscopic torque generation module 4 installed on the nacelle 1; the nacelle 1 is installed on an external tower 5, and the external cylinder 5 is installed on an external floating body 6, forming an aerodynamic load simulation device for a floating wind turbine;

[0061] like Figure 2-4 As shown, the aerodynamic load generating module 2 includes a support arm and a load generating unit 204, the load generating unit 204 is installed on the outside of the cabin 1 through the support arm, and the load generating unit 204 is used to generate aerodynamic loads along the length and width directions of the cabin 1; the gyroscopic torque generating module 4 includes a motor and a mass rod installed on the cabin 1, the mass rod is connected to the output shaft of the motor, and the motor is used to drive the mass rod to rotate and generate rotational inertia; the aerodynamic load control module 3 is connected to the load generating unit 204, and is used to control the size of the aerodynamic load generated by the load generating unit 204.

[0062] Specifically, the cabin 1 includes a cabin shell 100, which is used to install and accommodate the aerodynamic load generation module 2, the aerodynamic load control module 3, and the gyroscopic torque generation module 4. The cabin shell 100 is a hollow special-shaped rectangular metal processing part, preferably CNC-processed with aluminum alloy to ensure accuracy and weight control. The shell has a large number of holes for installation on the wind turbine tower 5 and for installing the first arm 201, the second arm 203, the brushless reduction motor 401 and other components. A larger ventilation hole is left under the shell for the heat dissipation fan 304 to quickly remove the heat of the electric control compartment 301.

[0063] Aerodynamic load generation module 2 Figure 2 , Figure 3 and Figure 4 As shown in , it includes a first arm 201, a duct fixing part 202, a second arm 203 and a load generating unit 204, wherein the load generating unit 204 is preferably a duct fan, and the first arm 201 is a hollow truncated cone-shaped vertical metal part, preferably aluminum alloy CNC processing, fixed to the cabin shell 100 by bolt connection, and a duct fixing part 202 is connected by bolts, and the interior is hollow to facilitate the passage of cables. The second arm 203 is a Y-shaped metal part with a hollow interior and a fork at one end, preferably aluminum alloy CNC processing, fixed to the cabin shell 100 by bolt connection, and two duct fixing parts 202 are connected by bolts, and the interior is hollow to facilitate the passage of cables. The duct fixing part 202 is a handle-shaped metal part with an annular structure at one end, and there are multiple holes on the handle that can be connected to the first arm 201 or the second arm 203. The annular structure is used to clamp the duct fan, and the duct fan is fixed by bolt connection. The ducted fan is a load active generating unit and is selected according to the target aerodynamic load value of the target fan solution. Its cables can pass through the holes of the cabin shell 100 and the first arm 201 or the second arm 203.

[0064] Pneumatic load control module 3 Figure 5 As shown, it includes an electric regulating compartment 301, an electronic speed regulator 302, a heat sink 303 and a cooling fan 304. The electronic speed regulator 302 and the heat sink 303 are installed in the electric regulating compartment 301. The electronic speed regulator 302 is used to adjust the speed of the ducted fan. The heat sink 303 is preferably a thin fin-shaped metal sheet, which is used to quickly remove heat from the densely arranged electronic speed regulators 302. The cooling fan 304 is fixed to the electric regulating compartment 301 by bolt connection, and is used to quickly remove the heat accumulated in the electric regulating compartment 301.

[0065] Gyro torque generation module 4 is as follows Figure 5As shown, it includes a brushless reduction motor 401, a Y-shaped three-way connector 402 and a mass rod 403. The brushless reduction motor 401 is fixed to the tail of the nacelle 100 by bolt connection, and is fastened to the Y-shaped three-way connector 402 by screws, and is used to drive the mass rod 403 to rotate. The Y-shaped three-way connector 402 is a metal coupling with a Y-shaped three-way pipe, preferably CNC-processed with aluminum alloy, and is fastened to three mass rods 403 by screws. The mass rod 403 is a long hollow aluminum tube, which is selected according to the rotational inertia of the wind wheel of the target wind turbine solution, and its rotational inertia can be adjusted by adding counterweights such as bundling lead wire.

[0066] According to the test method of the floating wind turbine multi-degree-of-freedom aerodynamic load simulation device provided by the present invention, based on the above-mentioned load generation module, a set of floating wind turbine model aerodynamic load simulation operation procedures for different working conditions are designed, which specifically include the following steps:

[0067] Step 1, before starting the simulation test, the moment of inertia of the gyro torque generating module 4 is adjusted to a target value by adjusting the counterweight on the mass rod 403, thereby ensuring that the moment of inertia is similar.

[0068] Step 2: The brushless reduction motor 401 of the gyroscopic torque generating module 4 drives the mass rod 403 to rotate, and its rotation speed satisfies the rotation speed similar to the actual wind turbine rotor rotation speed, thereby simulating an accurate gyroscopic torque.

[0069] Step 3: The computer starts to perform numerical simulation of the corresponding working conditions, calculates the actual aerodynamic load on the fan unit at each moment, decomposes the load into forces and moments in two directions, obtains the stress and moment corresponding to the model scale after similarity scaling using Froude numbers, and solves the output tasks that different ducted fans need to undertake.

[0070] In a preferred embodiment, if Figure 6 Taking the eight ducted fans shown as an example, a rectangular coordinate system is established with the paper surface facing outward as the positive direction of the x-axis, the right as the positive direction of the y-axis, and the upward as the positive direction of the z-axis, and the right-hand rule is used to determine the positive and negative directions of the torque. The four ducted fans on the upper, lower, left and right sides of the cabin are responsible for simulating the aerodynamic thrust in the negative direction of the x-axis, of which the ducted fan on the right can also simulate the torque in the positive direction of the z-axis, and the ducted fan on the left can also simulate the torque in the negative direction of the z-axis. The two ducted fans on the upper left and lower left of the cabin are responsible for simulating the aerodynamic thrust in the positive direction of the y-axis, and the two ducted fans on the upper right and lower right are responsible for simulating the aerodynamic thrust in the negative direction of the y-axis, of which the two ducted fans on the upper right and lower left can also simulate the torque in the positive direction of the x-axis, and the two ducted fans on the upper left and lower right can also simulate the torque in the negative direction of the x-axis.

[0071] If the aerodynamic load of the fan obtained by computer simulation at a certain moment is the thrust Fx along the negative direction of the X-axis, the thrust Fy along the positive direction of the Y-axis, the torque Mx along the positive direction of the X-axis and the torque Mz along the positive direction of the Z-axis. Then the right duct should produce The upper and lower ducts should each generate The upper left duct should produce a thrust of The thrust of the lower left duct should be Among them, l1 is the force arm of the right duct to the axis of the cabin, and l2 is the force arm of the upper left and lower left duct to the axis of the cabin.

[0072] Step 4: The computer sends instructions to the aerodynamic load control module 3 at fixed time intervals. After receiving the instructions, the electronic speed regulator 302 in the aerodynamic load control module 3 adjusts the speed of the ducted fan 204 in real time, thereby simulating accurate multi-degree-of-freedom aerodynamic loads.

[0073] Step 5, after the simulation is finished, the computer simultaneously sends an end instruction to the aerodynamic load control module 3 and the gyroscopic torque generation module 4. After receiving the end instruction, the output force of the aerodynamic load generation module 2 is reduced to 0 and stops working. Preferably, the speed of the ducted fan is reduced to 0, and the speed of the brushless reduction motor 401 is reduced to 0 and stops working.

[0074] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0075] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A floating wind turbine multi-degree-of-freedom aerodynamic load simulation device, characterized in that: It comprises a cabin (1), and an aerodynamic load generation module (2), an aerodynamic load control module (3), and a gyroscopic torque generation module (4) installed on the cabin (1); The aerodynamic load generation module (2) comprises a support arm and a load generation unit (204); the load generation unit (204) is installed outside the cabin (1) via the support arm; the load generation unit (204) is used to generate aerodynamic loads along the length direction and the width direction of the cabin (1); The gyro torque generating module (4) comprises a motor and a mass rod mounted on the nacelle (1), the mass rod being connected to an output shaft of the motor, and the motor being used to drive the mass rod to rotate and generate a moment of inertia; The pneumatic load control module (3) is connected to the load generation unit (204) and is used to control the size of the pneumatic load generated by the load generation unit (204).

2. The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 1, characterized in that: The nacelle (1) comprises a nacelle shell (100), the nacelle shell (100) is a hollow rectangular parallelepiped, and the bottom of the nacelle shell (100) is fixedly mounted on an external tower (5).

3. The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 2, characterized in that: The support arm comprises a first support arm (201) and a second support arm (202), and the outer ends of the first support arm (201) and the second support arm (202) are both used for installing a load generating unit (204); There are a plurality of first arms (201), and the plurality of first arms (201) are circumferentially mounted on the outside of the nacelle shell (100); and the load generating unit (204) on the first arm (201) is used to generate a load along the length direction of the nacelle shell (100); The second arm (202) is a Y-shaped structure, and the two outer ends of the Y-shaped structure are respectively used to install two load generating units (204), and the second arm (202) is symmetrically installed on both sides of the cabin shell (100), and the load generating units (204) on the second arm (202) are used to generate loads along the width direction of the cabin shell (100).

4. The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 3, characterized in that: The load generating unit (204) comprises a duct fan, and the duct fan is installed on the outer ends of the first arm (201) and the second arm (202) through a duct fixing member; One end of the duct fixing member is installed on the support arm, and the other end of the duct fixing member is an annular fixing structure, and the annular fixing structure is used to clamp the duct fan and is fixedly connected to the duct fan.

5. The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 3, characterized in that: The first support arm (201) is a hollow truncated cone-shaped vertical metal member, which is fixedly mounted on the outside of the cabin shell (100) by means of bolts, and the hollow structure of the first support arm (201) is used for passing cables of the load generating unit (204); The second arm (202) is a hollow Y-shaped metal part, which is fixed to the side of the cabin shell (100) by bolts, and the hollow structure of the second arm (202) is used for passing the cable of the load generating unit (204).

6. The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 2, characterized in that: The gyro torque generating module (4) comprises a brushless reduction motor (401) and a plurality of mass rods (403), wherein the plurality of mass rods (403) are arranged in a circumferential direction and extend in a radial direction of an output shaft of the brushless reduction motor (401); The brushless reduction motor (401) is installed inside the cabin shell (100), and the mass rod (403) is located at one end of the cabin shell (100) along the length direction.

7. The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 6, characterized in that: The gyro torque generating module (4) further comprises a Y-shaped three-way connector (402) There are three mass rods (403), which are respectively connected to three interfaces of the Y-shaped three-way connector (402) and are evenly installed on the output shaft of the brushless reduction motor (401) along the circumferential direction through the Y-shaped three-way connector (402).

8. The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 2, characterized in that: The pneumatic load control module (3) comprises an electric control compartment (301), an electronic speed regulator (302), a heat sink (303) and a heat dissipation fan (304); The electric regulating compartment (301) is installed inside the cabin shell (100), the electronic speed regulator (302) and the heat sink (303) are both installed inside the electric regulating compartment (301), and the electronic speed regulator (302) is connected to an external computer to adjust the size of the aerodynamic load generated by the load generation unit (204); The heat sink (303) is used to dissipate heat for the electronic speed regulator (302), the heat dissipation fan (304) is installed on the electronic speed regulator compartment (301), and the cabin shell (100) is provided with heat dissipation holes corresponding to the heat dissipation fan (304).

9. A test method for a floating wind turbine multi-degree-of-freedom aerodynamic load simulation device, characterized in that: The floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to any one of claims 1 to 8 comprises the following steps: Step 1: adjusting the counterweight on the mass rod (403) so that the moment of inertia of the gyro torque generating module (4) is adjusted to a preset target value; Step 2: The brushless reduction motor (401) of the gyro torque generating module (4) drives the mass rod (403) to rotate until the rotation speed of the mass rod (403) reaches a preset speed; Step 3: The computer starts to perform numerical simulation of the corresponding working condition, obtains the actual aerodynamic load on the fan unit at each moment, decomposes the load into forces and moments in two perpendicular directions, obtains the model scale corresponding stress and moment after similarity scaling using Froude numbers, and solves the aerodynamic loads that need to be generated by the load generation unit (204) in the two directions; Step 4: The computer sends instructions to the pneumatic load control module (3) at a preset time interval, and the electronic speed regulator (302) in the pneumatic load control module (3) adjusts the speed of the ducted fan (204) in real time after receiving the instructions; Step 5: After the simulation is completed, the computer sends an end instruction to the pneumatic load control module (3) and the gyro torque generation module (4) at the same time, the pneumatic load control module (3) controls the pneumatic load generated by the load generation unit (204) to be reduced to 0, and the brushless reduction motor (401) controls the rotation speed of the mass rod (403) to be reduced to 0.

10. The test method of the floating wind turbine multi-degree-of-freedom aerodynamic load simulation device according to claim 9, characterized in that: A coordinate system is constructed with the midpoint of the cabin as the origin, the length direction of the shell (100) as the X-axis, the width direction of the cabin shell (100) as the Y-axis, and the height direction of the cabin shell (100) as the Z-axis; In the projection along the X-axis direction, four load generating units (204) for generating X-direction aerodynamic loads are respectively arranged in the positive Y direction, negative Y direction, positive Z direction, and negative Z direction of the cabin shell (100), and two groups of load generating units (204) for generating Y-direction aerodynamic loads are respectively arranged on both sides of the cabin shell (100) along the Y direction.

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