An adaptive fan tower drum multi-modal damping synergistic device and method

Abstract

The application discloses a kind of self-adapting fan tower drum multimode damping synergistic device and method, comprising: guide slide rail and damping energy dissipation mechanism, damping energy dissipation mechanism includes: sliding block, sleeve joint is on guide slide rail;Annular connecting plate is fixed on sliding block;Arm, along the uniform distribution of annular connecting plate's circumference;Cable, one end is fixed in corresponding arm free end;Gear rack amplification mechanism is used to amplify;Self-resetting damper is used to provide damping.The application utilizes arm to convert the bending deformation of tower drum into the vertical displacement of arm end, realizes first re-amplification effect;The vertical displacement of arm end is transmitted to gear rack amplification mechanism through cable, after amplification by gear rack amplification mechanism, then amplify the deformation of self-resetting damper, realize second re-amplification effect;Gear rack amplification mechanism can be arranged along the driving direction multiple, and then realize multiple amplification effect.The device has important significance for offshore wind turbine to resist typhoon and other extreme sea conditions.

Description

Technical Field

[0001] This application relates to the field of wind turbine structural vibration control technology, and in particular to an adaptive wind turbine tower multimodal damping enhancement device and method. Background Technology

[0002] To capture more wind energy, wind turbines are expanding from onshore to nearshore and then to deep-sea areas, trending towards larger sizes. Their towers are becoming longer and their blades larger, making the turbine structure increasingly sensitive to dynamic loads. During their service life, they will experience severe vibrations when encountering complex marine environmental loads such as wind, waves, and earthquakes. Furthermore, the turbines themselves have low damping ratios, and may face the risk of collapse under extreme sea conditions such as typhoons. Increasing the cross-sectional dimensions of components or selecting materials with higher elastic moduli to increase the stiffness of the turbine tower is highly uneconomical. Therefore, optimizing design strategies to promote energy dissipation is becoming a more effective method. Traditional energy dissipation methods often use TMD (Total Damping Device) dampers; however, dampers are generally placed at the top of the turbine, which limits space at the top of the tower and exacerbates the mass imbalance of the turbine structure. The adverse effects are significant and have a negative impact on the overall structural stability. Therefore, how to efficiently and economically reduce the adverse vibrations of wind turbine towers is of great importance for offshore wind turbines to resist extreme sea conditions such as typhoons. Summary of the Invention

[0003] The purpose of this application is to provide an adaptive multimodal damping enhancement device and method for wind turbine towers, to solve the problems existing in related technologies where the damping device has a fixed installation position, making it difficult to effectively suppress multimodal vibrations; and where the TMD type vibration reduction strategy is concentrated at the top of the tower, which easily leads to uneven distribution of structural mass and exacerbates the problem. The technical problems include: the amplification effect is not significant and the energy consumption efficiency is low.

[0004] According to a first aspect of the embodiments of this application, an adaptive wind turbine tower multimodal damping enhancement device is provided, comprising:

[0005] The first guide rail is vertically fixed on the inner wall of the wind turbine tower;

[0006] At least one set of vibration damping and energy dissipation mechanisms, the vibration damping and energy dissipation mechanisms comprising:

[0007] The first slider is fitted onto the first guide rail;

[0008] An annular connecting plate is fixed to the first slider;

[0009] At least four extension arms are evenly distributed along the circumference of the annular connecting plate, with the free ends of the extension arms facing the center of the circle.

[0010] Each cable corresponds to one of the extension arms, with one end fixed to the free end of the corresponding extension arm.

[0011] At least one set of gear and rack amplification mechanism, the gear and rack amplification mechanism comprising:

[0012] The fastener is fixedly connected to the wind turbine tower.

[0013] A fixed rack is fixed to the fixing member;

[0014] The second guide rail is fixed to the fixing member;

[0015] The second slider is fitted onto the second guide rail;

[0016] A sliding rack is fixed on the second slider and arranged opposite to the fixed rack.

[0017] A gear and a gear shaft, wherein the gear is rotatably mounted on the gear shaft and meshes with a fixed rack and a sliding rack arranged on both sides thereof;

[0018] In a self-resetting damper, when there is only one set of gear and rack amplification mechanism, the upper end of the self-resetting damper is connected to the lower end of the sliding rack, and the lower end is connected to the fixing member. The gear shaft is connected to the cable. When there are multiple sets of gear and rack amplification mechanisms, the multiple sets of gear and rack amplification mechanisms are connected in series. The gear shaft of the uppermost gear and rack amplification mechanism is connected to the cable. The upper end of the self-resetting damper is connected to the lower end of the sliding rack of the lowermost gear and rack amplification mechanism, and the lower end is connected to the fixing member.

[0019] Optionally, if there are multiple sets of vibration damping and energy dissipation mechanisms, the extension arms on each set of vibration damping and energy dissipation mechanisms shall be staggered evenly.

[0020] Optionally, if there are multiple sets of vibration damping and energy dissipation mechanisms, the annular connecting plate in each set of vibration damping and energy dissipation mechanisms is moved to the position of maximum vibration mode corresponding to each mode.

[0021] Optionally, the first guide rail is vertically fixed to the inner wall of the wind turbine tower by means of wall connectors of different lengths at its upper and lower ends.

[0022] Optionally, a first limiting plate is fixed on both sides of the fixed rack, and a guide limiting groove is opened on the first limiting plate, and the gear shaft is disposed in the guide limiting groove.

[0023] Optionally, the self-resetting damper includes:

[0024] case;

[0025] A pair of second limiting plates are fixed inside the housing, dividing the housing into three chambers: the two on the left and right are buffer chambers, and the middle one is a damping chamber.

[0026] A self-resetting spring is disposed in the damping cavity;

[0027] The piston rod passes through the housing and a second limiting plate at one end and is connected to one end of the self-resetting spring.

[0028] Optionally, when there are multiple sets of gear and rack amplification mechanisms, the sliding rack of the upper-level multiple sets of gear and rack amplification mechanisms is connected to the gear shaft of the lower-level multiple sets of gear and rack amplification mechanisms through a drive rod.

[0029] Optionally, there are at least two gears connected to each other by a connecting plate.

[0030] Optionally, it also includes:

[0031] Sensors, distributed along the height of the tower, are used to acquire wind turbine response data in real time;

[0032] A driving device is used to drive the first slider to slide on the first guide rail;

[0033] The controller, connected to the sensor and the drive device respectively, is used to determine the dominant mode and the maximum position of the corresponding mode shape based on the wind turbine response data acquired by the sensor through spectrum analysis and Bayesian method, and send control signals to the drive device to move the first slider equipped with the annular connecting plate to the maximum position of the mode shape corresponding to each mode.

[0034] According to a second aspect of the embodiments of this application, an adaptive multimodal damping enhancement method for wind turbine towers is provided. This method is implemented in the adaptive multimodal damping enhancement device for wind turbine towers described in the first aspect, and the method includes the following steps:

[0035] Step 1: Real-time vibration response data acquisition: The real-time wind turbine response data at multiple points along the axial direction of the wind turbine tower is continuously monitored by sensors and transmitted to the controller;

[0036] Step 2, Dominant Mode Identification and Location: The controller analyzes the real-time wind turbine response data through spectrum analysis and Bayesian methods to determine the modal order of the current dominant vibration and the corresponding maximum position of the mode displacement;

[0037] Step 3, Optimization of the number and position of the annular connecting plates: The controller generates a control signal and sends a control signal to the drive device to move the first slider equipped with the annular connecting plate to the maximum position of the vibration mode corresponding to each order mode;

[0038] Step 4: Adaptive vibration control adjustment; the sensor continuously monitors and repeats steps 1 to 3.

[0039] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0040] As can be seen from the above embodiments, this application differs from traditional local energy dissipation designs (such as TMD and TLD) in that it utilizes the outrigger to convert the bending deformation of the tower into vertical displacement at the outrigger end, achieving a first amplification effect. The vertical displacement at the outrigger end is transmitted to the rack and pinion amplification mechanism via cables, and after being amplified by the rack and pinion mechanism, it further amplifies the deformation of the self-resetting damper, achieving a second amplification effect. The rack and pinion amplification mechanism can be arranged in multiple ways along the driving direction, thus achieving multiple amplification effects. This rack and pinion amplification mechanism can be arranged not only along the target vibration direction but also uniformly along the tower base, thereby achieving vibration reduction effects in any horizontal direction. Furthermore, through real-time data feedback from sensors, the controller can adjust the number and position of the annular connecting plates according to the analyzed dominant mode, thereby achieving multi-modal vibration reduction effects.

[0041] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0042] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0043] Figure 1 This is a structural diagram of a wind turbine according to an exemplary embodiment.

[0044] Figure 2 This is a perspective view of an adaptive wind turbine tower multimodal damping enhancement device installed inside a wind turbine tower, according to an exemplary embodiment (with two sets of vibration reduction and energy dissipation mechanisms).

[0045] Figure 3 This is a structural diagram illustrating an adaptive multimodal damping enhancement device for wind turbine towers according to an exemplary embodiment.

[0046] Figure 4 This is a structural diagram of a gear and rack magnification mechanism according to an exemplary embodiment.

[0047] Figure 5 This is a schematic diagram of a series connection of two sets of gear and rack amplification mechanisms according to an exemplary embodiment.

[0048] Figure 6 This is a structural diagram of a self-resetting damper according to an exemplary embodiment.

[0049] The attached figures are labeled as follows:

[0050] 1. First guide rail; 11. Cylinder wall connecting parts;

[0051] 2. Vibration damping and energy dissipation mechanism; 21. First slider; 22. Annular connecting plate; 23. Extending arm; 24. Cable; 25. Gear and rack amplification mechanism; 251. Fixing component; 252. Fixed rack; 253. Second guide rail; 254. Second slider; 255. Sliding rack; 256. Gear; 257. Gear shaft; 258. First limiting plate; 259. Guide limiting groove; 26. Self-resetting damper; 261. Housing; 262. Second limiting plate; 263. Self-resetting spring; 264. Piston rod; 265. Buffer chamber; 266. Damping chamber; 27. Drive rod;

[0052] 3. Wind turbine tower;

[0053] 4. Sensors;

[0054] 5. Controller. Detailed Implementation

[0055] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0056] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0057] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0058] refer to Figures 1-6This invention provides an adaptive multimodal damping enhancement device for wind turbine towers, comprising: a first guide rail 1 and at least one set of vibration damping and energy dissipation mechanisms 2. The first guide rail 1 is vertically fixed to the inner wall of the wind turbine tower 3. The vibration damping and energy dissipation mechanism 2 comprises: a first slider 21, an annular connecting plate 22, at least four extension arms 23, a cable 24, at least one set of gear and rack amplification mechanisms 25, and a self-resetting damper 26. The first slider 21 is sleeved on the first guide rail 1. The annular connecting plate 22 is fixed to the first guide rail 1. On the first slider 21; the extension arms 23 are evenly distributed along the circumference of the annular connecting plate 22, and the free ends of the extension arms 23 face the center; the cables 24 correspond one-to-one with the extension arms 23, with one end fixed to the free end of the corresponding extension arm 23; the gear and rack amplification mechanism 25 includes: a fixing member 251, a fixing rack 252, a second guide rail 253, a second slider 254, a sliding rack 255, a gear 256, and a gear shaft 257, wherein the fixing member 251 is fixedly connected to the wind turbine tower 3; The fixed rack 252 is fixed to the fixing member 251; the second guide rail 253 is fixed to the fixing member; the second slider 254 is fitted onto the second guide rail 253; the sliding rack 255 is fixed to the second slider 254 and arranged opposite to the fixed rack 252; the gear 256 is rotatably mounted on the gear shaft 257 and meshes with the fixed rack 252 and the sliding rack 255 arranged on both sides thereof; when there is only one set of gear and rack amplification mechanism 25, The upper end of the self-resetting damper 26 is connected to the lower end of the sliding rack 255, and the lower end is connected to the fixing member 251. The gear shaft 257 is connected to the cable 24. When there are multiple sets of gear rack amplification mechanisms 25, the multiple sets of gear rack amplification mechanisms 25 are connected in series. The gear shaft 257 of the uppermost gear rack amplification mechanism 25 is connected to the cable 24. The upper end of the self-resetting damper 26 is connected to the lower end of the sliding rack 255 of the lowermost gear rack amplification mechanism 25, and the lower end is connected to the fixing member 251.

[0059] This invention utilizes the extender 23 to convert the bending deformation of the tower into a vertical displacement at the end of the extender 23, achieving a first amplification effect. The vertical displacement at the end of the extender 23 is transmitted to the rack and pinion amplification mechanism 25 via the cable 24. After being amplified by the rack and pinion amplification mechanism 25, it further amplifies the deformation of the self-resetting damper 26, achieving a second amplification effect. The rack and pinion amplification mechanism 25 can be arranged in multiple ways along the driving direction, thus achieving multiple amplification effects. This rack and pinion amplification mechanism 25 can be arranged not only along the target vibration direction but also uniformly along the tower base, thereby achieving vibration reduction effects in any horizontal direction.

[0060] In one embodiment, if there are multiple sets of vibration damping and energy dissipation mechanisms 2, the extension arms 23 on each set of vibration damping and energy dissipation mechanisms 2 are evenly staggered to avoid interference.

[0061] In one embodiment, if there are multiple sets of vibration damping and energy dissipation mechanisms 2, the annular connecting plate 22 in each set of vibration damping and energy dissipation mechanisms 2 is moved to the maximum position of the vibration mode corresponding to each order mode.

[0062] The vibration damping and energy dissipation mechanism 2 can be arranged not only along the target vibration direction, but also uniformly along the bottom side wall of the tower. In addition, it can be arranged in multiple ways along the driving direction. When there are multiple sets of gear and rack amplification mechanisms 25, the sliding rack 255 of the multiple sets of gear and rack amplification mechanisms 25 in the upper layer is connected to the gear shaft 257 of the multiple sets of gear and rack amplification mechanisms 25 in the lower layer through the drive rod 27. This can realize the multiple amplification effect of the vertical deformation of the extension arm 23, thereby producing an arbitrary lateral and efficient vibration damping effect.

[0063] In one embodiment, the first guide rail 1 is vertically fixed to the inner wall of the wind turbine tower 3 by means of wall connectors 11 of different lengths at its upper and lower ends, so as to ensure that the first guide rail 1 is vertically fixed.

[0064] In one embodiment, first limiting plates 258 (only one side is shown in the figure) are fixed on both sides of the fixed rack 252. The first limiting plates 258 have guide limiting grooves 259, and the gear shaft 257 is disposed in the guide limiting grooves 259. This allows for simultaneous limiting of the two sides and displacement of the gear 256.

[0065] The fixing member 251 can be a closed protective shell, which can be fixed to the bottom plate of the tower. An opening can be left at the top of the closed protective shell for the connection of the cable 24, without affecting the reciprocating motion of the drive rod 27 and the self-resetting damper 26.

[0066] In one embodiment, the self-resetting damper 26 includes: a housing 261, a pair of second limiting plates 262, a self-resetting spring 263, and a piston rod 264. The pair of second limiting plates 262 are fixed inside the housing 261, dividing the housing 261 into three chambers: two on the left and right are buffer chambers 265, and the middle is a damping chamber 266. The self-resetting spring 263 is disposed in the damping chamber 266. One end of the piston rod 264 passes through the housing 261 and a pair of second limiting plates 262 and is connected to one end of the self-resetting spring 263. Since the cable 24 only provides tension, after the self-resetting damper 26 undergoes tensile deformation, the piston rod 264 needs to be restored to its original position by the self-resetting spring 263.

[0067] Without loss of generality, there are at least two gears 256, which are connected by a connecting plate to ensure stability.

[0068] In one embodiment, to suppress multimodal vibrations induced by complex external marine environments, the system further includes: a sensor 4, a drive device, and a controller 5. The sensor 4 is distributed along the height of the tower and is used to acquire wind turbine response data in real time. The drive device is used to drive the first slider 21 to slide on the first guide rail 1. The controller 5 is connected to the sensor 4 and the drive device respectively, and is used to determine the dominant mode and the maximum position of the corresponding mode shape based on the wind turbine response data acquired by the sensor 4 through spectrum analysis and Bayesian methods. The controller then sends a control signal to the drive device to move the first slider 21, which is equipped with an annular connecting plate 22, to the maximum position of the mode shape corresponding to each mode, thereby achieving an adaptive multimodal vibration reduction effect. In addition, based on the real-time data fed back by the sensor 4, the controller 5 can adjust the number and position of the annular connecting plates 22 according to the analyzed dominant mode, thereby achieving a multimodal vibration reduction effect.

[0069] In one embodiment, the driving device may be a linear motor disposed in the first slider 21, which can realize the sliding of the first slider 21 on the first guide rail 1 and the determination of its position; or a lead screw sliding mechanism, etc., to drive the first slider 21 to slide along the guide rail and be positioned at a certain position on the first guide rail 1, which will not be described in detail here.

[0070] The working principle of the adaptive wind turbine tower 3 multimodal damping enhancement device is as follows:

[0071] When the wind turbine tower 3 undergoes lateral deformation under external lateral load, it converts the bending deformation of the flexible tower into the vertical deformation of the top fixing member 251, which in turn drives the cable 24 to reciprocate. This reciprocating motion is amplified by the gear and rack amplification mechanism 25 and transmitted to the connection of the self-resetting damper 26, which in turn drives the self-resetting damper 26 to undergo tensile or compressive deformation, thereby producing a highly efficient vibration control effect.

[0072] This invention also provides an adaptive multimodal damping enhancement method for wind turbine towers, implemented in the aforementioned adaptive multimodal damping enhancement device for wind turbine towers. The method includes the following steps:

[0073] Step 1: Real-time vibration response data acquisition: Sensor 4 continuously monitors the real-time wind turbine response data at multiple points along the axial direction of the wind turbine tower and transmits it to the controller 5;

[0074] Specifically, in step 1, sensors 4 are arranged in layers along the height of the tower to cover key areas such as the top, middle, bottom, and transition sections, enabling multi-point real-time response monitoring. For example, three triaxial accelerometers are arranged at the top of the tower to capture overall sway and torsional responses; in the middle section of the tower, a combination of strain and accelerometer sensors is set at approximately 10-meter intervals to monitor local bending deformation and vibration amplitude; displacement and accelerometer sensors are added at the bottom and transition sections to record foundation settlement and low-level response. The raw signals collected by each sensor are first preprocessed at the node end, including bandpass filtering to remove wind turbine mechanical noise and high-frequency interference, and time synchronization and amplitude calibration of the data. The pre-processed data is transmitted to controller 5 in real time, using redundant communication links to ensure the stability and integrity of data transmission under extreme sea conditions. The multi-point response data received by the controller will be used as input for subsequent spectrum analysis and Bayesian mode identification to construct the mode shape distribution information of the entire tower height. The advantages of this design are: by arranging multi-type sensors in layers along the entire height of the tower, the dynamic characteristics of the tower at different parts can be fully captured, providing high-precision and full-coverage data support for dominant mode identification; preprocessing and redundant communication ensure the accuracy and security of the data, and improve the reliability of subsequent mode shape analysis and position optimization.

[0075] Step 2, Dominant Mode Identification and Location: The controller analyzes real-time wind turbine response data using spectrum analysis and Bayesian methods to determine the modal order of the current dominant vibration and the corresponding maximum position of the mode displacement.

[0076] Specifically, the controller performs a Fast Fourier Transform (FFT) on the preprocessed time-history response data to obtain the power spectral density (PSD) distribution of the signal. This is achieved by identifying significant peaks in the power spectrum and their corresponding frequencies. And with the known modal database of wind turbine towers (containing the natural frequencies of each mode). ,in By comparing the modal orders, a preliminary determination of the modal order of the current dominant vibration can be made. For example, if detected With the second-order natural frequency in the database If they are very close, the current mode can be determined to be dominated by the second-order mode. To overcome the influence of environmental noise, measurement errors, and multimodal coupling, and to improve recognition accuracy and robustness, a Bayesian mode recognition method is further adopted. This method treats the mode parameters as random variables and updates their probability distribution under given observation data using Bayes' theorem. The core formula is as follows:

[0077]

[0078] in, The vector of modal parameters to be identified typically includes the natural frequencies, damping ratios, and mode shape coefficients of each mode. The observation data vector is the structural response data acquired and preprocessed by the sensor. Let be the prior probability density function, representing the probability density function of the modal parameters before obtaining the observation data. The initial understanding or assumptions. Let be the likelihood function, representing the likelihood of the parameter. Under a defined model, observed data The probability of. It is a normalized constant that ensures the posterior probability integral is 1. The posterior probability density function is the most complete statistical description of the parameters after obtaining the data. By solving this posterior probability distribution (e.g., using maximum a posteriori estimation (MAP) or sampling algorithms), the optimal parameter estimates for all excited dominant modes can be obtained simultaneously. This includes the order, frequency, and mode shape of each mode. By sequentially extracting the mode shape vector of each dominant mode, the mode shape distribution of the corresponding mode over the entire tower height can be reconstructed, thereby determining the maximum position of the corresponding mode shape and providing target instructions for the adaptive control in step 3.

[0079] Step 3, Optimization of the number and position of the annular connecting plate 22: The controller 5 generates a control signal and sends a control signal to the drive device to move the first slider 21 equipped with the annular connecting plate 22 to the maximum position of the vibration mode corresponding to each order mode.

[0080] Specifically, controller 5 generates a control signal based on the result of step 2, driving the first slider 21 to move along the first guide rail 1, positioning the annular connecting plate 22 at the location of the maximum displacement of the dominant mode. If multiple modes contribute significantly, the controller determines the required number of annular connecting plates and arranges them at the inverse node positions of each mode; the extension arms 23 of multiple damping mechanisms are evenly staggered in the circumferential direction to avoid interference. The driving device (such as a linear motor) enables rapid positioning and can be adjusted in real time according to changes in vibration characteristics. This design allows for flexible adjustment of the position and number of damping units for different modes, significantly improving the multimodal vibration reduction effect, while avoiding mass imbalance caused by the concentration of damping mass at the top of the tower. This effect ensures structural stability and ease of maintenance.

[0081] Step 4: Adaptive vibration control adjustment; Sensor 4 continuously monitors and repeats steps 1 to 3.

[0082] In summary, compared with existing technologies, the present invention has the following advantages: Unlike traditional local energy dissipation designs (such as TMD and TLD) in wind turbine structures, the present invention transforms the tower bending deformation under external loads into the vertical deformation of the outrigger 23. This vertical deformation is amplified by the rack and pinion amplification mechanism 25 and then transformed into the effective motion of the self-resetting damper 26, thereby achieving energy dissipation and vibration control. The rack and pinion amplification mechanism 25 can also be arranged in multiple ways along the driving direction to achieve multiple amplification effects, thus producing a highly efficient vibration control effect. The rack and pinion amplification mechanism 25 and the self-resetting damper 26 can be arranged not only along the vibration direction but also uniformly to achieve vibration control effects for lateral loads in any direction. In addition, based on the real-time data fed back by the sensor 4, the controller 5 can adjust the number and position of the annular connecting plates 22 according to the analyzed dominant mode, thereby achieving a multi-modal vibration reduction effect. The energy dissipation and vibration reduction system is located inside the tower, with a flexible structural design, simple installation process, and a highly efficient multi-modal vibration control effect in any direction.

[0083] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0084] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An adaptive wind turbine tower multi-modal damping augmentation device, characterized by, include: The first guide rail is vertically fixed on the inner wall of the wind turbine tower; At least one set of vibration damping and energy dissipation mechanisms, the vibration damping and energy dissipation mechanisms comprising: The first slider is fitted onto the first guide rail; An annular connecting plate is fixed to the first slider; At least four extension arms are evenly distributed along the circumference of the annular connecting plate, with the free ends of the extension arms facing the center of the circle. Each cable corresponds to one of the extension arms, with one end fixed to the free end of the corresponding extension arm. At least one set of gear and rack amplification mechanism, the gear and rack amplification mechanism comprising: The fastener is fixedly connected to the wind turbine tower. A fixed rack is fixed to the fixing member; The second guide rail is fixed to the fixing member; The second slider is fitted onto the second guide rail; A sliding rack is fixed on the second slider and arranged opposite to the fixed rack. A gear and a gear shaft, wherein the gear is rotatably mounted on the gear shaft and meshes with a fixed rack and a sliding rack arranged on both sides thereof; In a self-resetting damper, when there is only one set of gear and rack amplification mechanism, the upper end of the self-resetting damper is connected to the lower end of the sliding rack, and the lower end is connected to the fixing member. The gear shaft is connected to the cable. When there are multiple sets of gear and rack amplification mechanisms, the multiple sets of gear and rack amplification mechanisms are connected in series. The gear shaft of the uppermost gear and rack amplification mechanism is connected to the cable. The upper end of the self-resetting damper is connected to the lower end of the sliding rack of the lowermost gear and rack amplification mechanism, and the lower end is connected to the fixing member. Also includes: Sensors, distributed along the height of the tower, are used to acquire wind turbine response data in real time; A driving device is used to drive the first slider to slide on the first guide rail; The controller is connected to the sensor and the drive device respectively. It is used to determine the dominant mode and the maximum position of the corresponding mode shape based on the wind turbine response data acquired by the sensor through spectrum analysis and Bayesian method, and send control signals to the drive device to move the first slider equipped with the annular connecting plate to the maximum position of the mode shape corresponding to each mode.

2. An adaptive fan tower multi-modal damping augmentation device according to claim 1, wherein, If there are multiple sets of vibration damping and energy dissipation mechanisms, the extension arms on each set of vibration damping and energy dissipation mechanisms should be staggered evenly.

3. An adaptive fan tower damping device according to claim 1, wherein, If there are multiple sets of vibration damping and energy dissipation mechanisms, move the annular connecting plate in each set of vibration damping and energy dissipation mechanisms to the maximum position of the vibration mode corresponding to each order mode.

4. The adaptive multimodal damping enhancement device for wind turbine towers according to claim 1, characterized in that, The first guide rail is vertically fixed to the inner wall of the wind turbine tower by connecting parts of different lengths at its upper and lower ends.

5. The adaptive multimodal damping enhancement device for wind turbine towers according to claim 1, characterized in that, The fixed rack is fixed with first limiting plates on its left and right sides. The first limiting plates have guide limiting grooves, and the gear shaft is disposed in the guide limiting grooves.

6. The adaptive multimodal damping enhancement device for wind turbine towers according to claim 1, characterized in that, The self-resetting damper includes: case; A pair of second limiting plates are fixed inside the housing, dividing the housing into three chambers: the two on the left and right are buffer chambers, and the middle one is a damping chamber. A self-resetting spring is disposed in the damping cavity; The piston rod passes through the housing and a second limiting plate at one end and is connected to one end of the self-resetting spring.

7. The adaptive multimodal damping enhancement device for wind turbine towers according to claim 1, characterized in that, When there are multiple sets of gear and rack amplification mechanisms, the sliding rack of the gear and rack amplification mechanism of the upper layer is connected to the gear shaft of the gear and rack amplification mechanism of the lower layer through the drive rod.

8. The adaptive multimodal damping enhancement device for wind turbine towers according to claim 1, characterized in that, There are at least two gears, which are connected by a connecting plate.

9. An adaptive multimodal damping enhancement method for wind turbine towers, characterized in that, This method is implemented in the adaptive wind turbine tower multimodal damping enhancement device according to claim 8, and the method includes the following steps: Step 1: Real-time vibration response data acquisition: The real-time wind turbine response data at multiple points along the axial direction of the wind turbine tower is continuously monitored by sensors and transmitted to the controller; Step 2, Dominant Mode Identification and Location: The controller analyzes the real-time wind turbine response data through spectrum analysis and Bayesian methods to determine the modal order of the current dominant vibration and the corresponding maximum position of the mode displacement; Step 3, Optimization of the number and position of the annular connecting plates: The controller generates a control signal and sends a control signal to the drive device to move the first slider equipped with the annular connecting plate to the maximum position of the vibration mode corresponding to each order mode; Step 4: Adaptive vibration control adjustment; the sensor continuously monitors and repeats steps 1 to 3.

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