Stability monitoring method and system for offshore wind power pile

Abstract

The invention discloses a stability monitoring method and system for an offshore wind power pile, and relates to the technical field of offshore wind power piles, and the method comprises the steps: 1, collecting stable data of a wind power plant, 2, analyzing the stability of the wind power plant, and 3, monitoring and early warning the stability of the wind power plant. The working operation coincidence index of each working condition of the offshore wind power pile is evaluated, each abnormal working condition of the offshore wind power pile is screened, the limitation of traditional experience judgment is broken, small hidden dangers are prevented from being accumulated into large faults, the safety of an offshore wind power plant is improved, shutdown loss and maintenance cost caused by structural failure are reduced, and the stable state of the offshore wind power pile is analyzed. The safety and reliability of operation of the wind power plant are improved, the situation that the pile body is damaged or the wind power plant stops running due to deterioration of abnormal working conditions is avoided, economic losses are reduced, and blind inspection tour and invalid work are reduced.

Description

Technical Field

[0001] This invention relates to the field of offshore wind turbine pile technology, and specifically to a method and system for stability monitoring of offshore wind turbine piles. Background Technology

[0002] With the continuous growth of global demand for clean energy, offshore wind power, as a highly promising form of renewable energy, has developed rapidly in recent years. As a key structure supporting offshore wind turbines, the stability of offshore wind turbine piles is directly related to the safe and reliable operation of the turbines. The piles must not only bear the huge weight of the wind turbine tower and blades, but also resist the influence of complex and ever-changing marine environmental factors. Therefore, it is necessary to analyze a stability monitoring method and system for offshore wind turbine piles.

[0003] Existing technology, such as the invention application patent with publication number CN119026061B, discloses a method and system for stability monitoring of offshore wind turbine piles. This method involves anomaly analysis of the acquired tilt angle time-series data of the wind turbine piles to determine the degree of anomaly at data points within the tilt angle time-series data, and then determining the stability of the wind turbine piles based on the degree of anomaly. This enables in-depth analysis and calculation of marine environmental disturbances, thereby improving the accuracy and performance of wind turbine pile stability monitoring.

[0004] Existing technologies can meet the basic requirements for a stability monitoring method and system for offshore wind turbine piles, but there are also some potential defects and challenges, specifically in the following aspects: First, the existing technologies are not accurate enough in assessing the operational compliance index of offshore wind turbine piles under various operating conditions, which affects the screening of abnormal operating conditions of offshore wind turbine piles, leading to the limitations of traditional experience-based judgment, affecting the accumulation of small hidden dangers into major failures, reducing the safety of offshore wind farms, and increasing downtime losses and maintenance costs due to structural failures.

[0005] Second, the existing technology does not pay enough attention to the analysis of the stability status of offshore wind turbine piles, which affects early warning prompts, reduces the safety and reliability of wind farm operation, leads to the deterioration of abnormal operating conditions, resulting in pile damage or wind farm shutdown, increases economic losses, and increases the problems of blind inspections and ineffective operations. Summary of the Invention

[0006] The purpose of this invention is to provide a method and system for stability monitoring of offshore wind turbine piles, which solves the problems existing in the background art.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a stability monitoring method for offshore wind turbine piles, including: step one, wind farm stability data acquisition, step two, wind farm stability analysis, and step three, wind farm stability monitoring and early warning.

[0008] Step 1: Wind Farm Stability Data Acquisition: By collecting data from offshore wind turbine piles, operational data of the offshore wind turbine piles are obtained, and then the operational compliance index of the offshore wind turbine piles under various operating conditions is evaluated.

[0009] Step 2: Stability analysis of the wind farm: Based on the obtained operating compliance index of each working condition of the offshore wind turbine, the abnormal working conditions of the offshore wind turbine are screened.

[0010] Step 3: Wind farm stability monitoring and early warning: Based on the abnormal operating conditions of the offshore wind turbines, analyze the stability status of the offshore wind turbines and issue early warnings.

[0011] Furthermore, the offshore wind turbine pile working data includes load data, foundation data, fatigue data, and scour data.

[0012] Furthermore, the specific analysis method for evaluating the operational compliance index of offshore wind turbine piles under various working conditions is as follows: Based on the obtained load data, foundation data, fatigue data, and scour data, the load data includes: the horizontal displacement length at the top of the pile, the bending moment value of the pile body, and the material strength value at various time periods for each working condition of the offshore wind turbine pile; the foundation data includes: the pore pressure value, embedment value, and horizontal bearing capacity value of each soil layer for each working condition of the offshore wind turbine pile; the fatigue data includes: the fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth for each working condition of the offshore wind turbine pile; the scour data includes: the number of scour pits around the offshore wind turbine pile, the amount of gravel, and the gravel particle size for each working condition of the offshore wind turbine pile. The environmental load compliance index M for each working condition of the offshore wind turbine pile is then analyzed. d The operating status conforms to the index N d The structural state conforms to the index P. d This allows for the evaluation of the operational compliance index of offshore wind turbine piles under various operating conditions. The specific calculation formula is: β d =M d +N d +P d Where d represents the number of each working condition, d = 1, 2, ..., k, and k represents the number of working conditions.

[0013] Furthermore, the environmental loads of the offshore wind turbine piles under various operating conditions conform to the index M. dThe specific analysis method is as follows: Based on the obtained horizontal displacement length at the top of the column, bending moment value, and material strength value of each working condition and time period of the offshore wind turbine pile, the horizontal displacement length at the top of the column, bending moment value, and material strength value of each working condition and time period of the offshore wind turbine pile are compared with the compliance values ​​of the horizontal displacement length at the top of the column, bending moment value, and material strength value of the offshore wind turbine pile stored in the database. If the horizontal displacement length at the top of the column of a certain working condition and time period of the offshore wind turbine pile is greater than or equal to the compliance value of the horizontal displacement length at the top of the column, the bending moment value is greater than or equal to the compliance value of the column, and the material strength value is greater than or equal to the compliance value of the material strength, then the environmental load compliance index of the offshore wind turbine pile for that working condition is recorded as 1; otherwise, it is recorded as -1. Thus, the environmental load compliance index M of each working condition of the offshore wind turbine pile is obtained. d , of which M d The values ​​include 1 and -1.

[0014] Furthermore, the operating status of the offshore wind turbine piles under various working conditions conforms to the exponent N. d The specific analysis method is as follows: Based on the obtained pore pressure, embedment value, and horizontal bearing capacity values ​​of each soil layer under each working condition of the offshore wind turbine pile, the pore pressure, embedment value, and horizontal bearing capacity values ​​of each soil layer under each working condition of the offshore wind turbine pile are compared with the pore pressure reference value, embedment reference value, and horizontal bearing capacity reference value of the offshore wind turbine pile stored in the database. If the pore pressure value of a certain soil layer under a certain working condition of the offshore wind turbine pile is less than the pore pressure reference value, the embedment value is greater than or equal to the embedment reference value, and the horizontal bearing capacity value is greater than or equal to the horizontal bearing capacity reference value, then the operating state compliance index of the offshore wind turbine pile under that working condition is recorded as 1; otherwise, it is recorded as -1. Thus, the operating state compliance index N of each working condition of the offshore wind turbine pile is obtained. d , where N d The values ​​include 1 and -1.

[0015] Furthermore, the structural condition compliance index of the offshore wind turbine piles under various operating conditions is analyzed based on the obtained fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth of the offshore wind turbine piles under various operating conditions. The safe ranges for fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth of the offshore wind turbine piles are extracted from the database. The specific calculation formula is as follows: S df S represents the fatigue data of the f-th condition under the d-th working condition of an offshore wind turbine pile. df ' represents the coincidence interval of the f-th fatigue data of offshore wind turbine pile, f∈[1,4].

[0016] The structural state conformity index of offshore wind turbine piles under various operating conditions is analyzed, and its specific calculation formula is P. d =D d +Y d, where Y d This represents the scour compliance index for various operating conditions of offshore wind turbine piles.

[0017] Furthermore, the scour compliance index for each operating condition of the offshore wind turbine pile is specifically analyzed as follows: Based on the number of surrounding scour pits, the number of gravel, and the gravel particle size for each operating condition of the offshore wind turbine pile, these values ​​are compared with the safe ranges for the number of surrounding scour pits, the number of gravel, and the gravel particle size stored in the database. If the number of surrounding scour pits, the number of gravel, and the gravel particle size for a certain operating condition of the offshore wind turbine pile are within the safe ranges, then the scour compliance index for that operating condition is recorded as 1; otherwise, it is recorded as -1. This yields the scour compliance index Y for each operating condition of the offshore wind turbine pile. d , where Y d The values ​​include 1 and -1.

[0018] Furthermore, the specific analysis method for screening abnormal operating conditions of offshore wind turbine piles is as follows: Based on the obtained operating compliance index of each operating condition of the offshore wind turbine pile, the operating compliance index of each operating condition of the offshore wind turbine pile is compared with the operating compliance index threshold of the operating condition of the offshore wind turbine pile stored in the database. If the operating compliance index of a certain operating condition of the offshore wind turbine pile is less than the operating compliance index threshold, it indicates that the operating condition is abnormal and is recorded as an abnormal operating condition, thereby obtaining the abnormal operating conditions of the offshore wind turbine pile. Conversely, it indicates that the operating condition is normal.

[0019] Furthermore, the specific analysis method for analyzing the stability state of offshore wind turbine piles and providing early warnings is as follows: Based on the obtained abnormal operating conditions of the offshore wind turbine piles, the environmental load compliance index, operational status compliance index, and structural status compliance index of the offshore wind turbine piles corresponding to each abnormal operating condition are collected. If the environmental load compliance index, operational status compliance index, and structural status compliance index of a certain abnormal operating condition of the offshore wind turbine pile are all greater than or equal to the environmental load compliance index safety threshold, the stability value of the offshore wind turbine pile is recorded as 1, indicating that the offshore wind turbine pile is in a stable state. If the environmental load compliance index, operational status compliance index, or structural status compliance index of a certain abnormal operating condition of the offshore wind turbine pile is less than the environmental load compliance index safety threshold, the operational status compliance index, or structural status compliance index is less than the structural status compliance index safety threshold, the stability value of the offshore wind turbine pile is recorded as -1, indicating that the offshore wind turbine pile is in an unstable state. In this case, the monitoring frequency is increased, scour prevention and construction protection are implemented, and early warnings are issued.

[0020] A second aspect of the present invention provides a system for performing the aforementioned method for stability monitoring of offshore wind turbine piles, characterized in that it includes: a wind farm stability data acquisition module: by acquiring data from offshore wind turbine piles, obtaining offshore wind turbine pile working data, and then evaluating the working operation compliance index of offshore wind turbine piles under various working conditions.

[0021] Wind farm stability analysis module: Based on the obtained operating compliance index of offshore wind turbines under various operating conditions, it filters out abnormal operating conditions of offshore wind turbines.

[0022] Wind farm stability monitoring and early warning module: Based on the abnormal operating conditions of offshore wind turbine piles, analyze the stability status of offshore wind turbine piles and provide early warning prompts.

[0023] The beneficial effects of this invention are as follows: In step one, wind farm stability data acquisition, and step two, wind farm stability analysis, by collecting data from offshore wind turbine piles, operational data of the offshore wind turbine piles is obtained. This allows for the evaluation of the operational compliance index of the offshore wind turbine piles under various operating conditions, and the screening of abnormal operating conditions. This breaks through the limitations of traditional experience-based judgment, prevents small hidden dangers from accumulating into major failures, improves the safety of offshore wind farms, and reduces downtime losses and maintenance costs caused by structural failures.

[0024] In step three, wind farm stability monitoring and early warning: based on the abnormal operating conditions of the offshore wind turbine piles, the stability status of the offshore wind turbine piles is analyzed and early warning is issued, which improves the safety and reliability of wind farm operation, avoids the deterioration of abnormal operating conditions leading to pile damage or wind farm shutdown, reduces economic losses, and reduces blind inspections and ineffective operations. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the implementation steps of the method of the present invention.

[0027] Figure 2 This is a schematic diagram of the system structure connection of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Reference Figure 1 As shown, the present invention provides a stability monitoring method for offshore wind turbine piles, including: step one, wind farm stability data acquisition; step two, wind farm stability analysis; and step three, wind farm stability monitoring and early warning.

[0030] Step 1: Wind Farm Stability Data Acquisition: By collecting data from offshore wind turbine piles, operational data of the offshore wind turbine piles are obtained, and then the operational compliance index of the offshore wind turbine piles under various operating conditions is evaluated.

[0031] In the above embodiments, the working data of the offshore wind turbine piles includes load data, foundation data, fatigue data, and scour data.

[0032] It should be noted that the working data of offshore wind turbine piles were obtained through limit state design method, high-resolution geological profile, SN curve and Miner method damage accumulation analysis, and CFD simulation evaluation analysis.

[0033] In the above embodiments, the specific analysis method for evaluating the operational compliance index of offshore wind turbine piles under various working conditions is as follows: Based on the obtained load data, foundation data, fatigue data, and scour data, the load data includes: the horizontal displacement length at the top of the pile, the bending moment value of the pile body, and the material strength value at various time periods for each working condition of the offshore wind turbine pile; the foundation data includes: the pore pressure value, embedment value, and horizontal bearing capacity value of each soil layer for each working condition of the offshore wind turbine pile; the fatigue data includes: the fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth for each working condition of the offshore wind turbine pile; and the scour data includes: the number of scour pits around the offshore wind turbine pile, the amount of gravel, and the gravel particle size for each working condition of the offshore wind turbine pile. The environmental load compliance index M for each working condition of the offshore wind turbine pile is then analyzed. d The operating status conforms to the index N d The structural state conforms to the index P. d This allows for the evaluation of the operational compliance index of offshore wind turbine piles under various operating conditions. The specific calculation formula is: β d =M d +N d +P d Where d represents the number of each working condition, d = 1, 2, ..., k, and k represents the number of working conditions.

[0034] In the above embodiments, the environmental load compliance index for each working condition of the offshore wind turbine pile is specifically analyzed as follows: Based on the obtained column top horizontal displacement length, column body bending moment value, and material strength value for each time period under each working condition of the offshore wind turbine pile, the column top horizontal displacement length, column body bending moment value, and material strength value for each time period under each working condition of the offshore wind turbine pile are compared with the compliance values ​​for column top horizontal displacement length, column body bending moment value, and material strength value of the offshore wind turbine pile stored in the database. If the column top horizontal displacement length for a certain working condition of the offshore wind turbine pile is greater than or equal to the compliance value for column top horizontal displacement length, the column body bending moment value is greater than or equal to, and the material strength value is greater than or equal to the compliance value for material strength, then the environmental load compliance index for that working condition of the offshore wind turbine pile is recorded as 1; otherwise, it is recorded as -1, thereby obtaining the environmental load compliance index M for each working condition of the offshore wind turbine pile. d , of which M d The values ​​include 1 and -1.

[0035] In the above embodiments, the operational status compliance index of the offshore wind turbine pile under each working condition is specifically analyzed as follows: Based on the obtained pore pressure, embedment value, and horizontal bearing capacity values ​​of each soil layer under each working condition of the offshore wind turbine pile, the pore pressure, embedment value, and horizontal bearing capacity values ​​of each soil layer under each working condition of the offshore wind turbine pile are compared with the pore pressure reference value, embedment reference value, and horizontal bearing capacity reference value of the offshore wind turbine pile stored in the database. If the pore pressure value of a certain soil layer under a certain working condition of the offshore wind turbine pile is less than the pore pressure reference value, the embedment value is greater than or equal to the embedment reference value, and the horizontal bearing capacity value is greater than or equal to the horizontal bearing capacity reference value, then the operational status compliance index of the offshore wind turbine pile under that working condition is recorded as 1; otherwise, it is recorded as -1, thereby obtaining the operational status compliance index N of the offshore wind turbine pile under each working condition. d , where N d The values ​​include 1 and -1.

[0036] In the above embodiments, the structural state conformity index of the offshore wind turbine pile under various working conditions is analyzed using the following method: based on the obtained fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth of the offshore wind turbine pile under various working conditions, and extracting the safe ranges for fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth of the offshore wind turbine pile from the database, the fatigue conformity index of the offshore wind turbine pile under various working conditions is analyzed. The specific calculation formula is as follows: S df S represents the fatigue data of the f-th condition under the d-th working condition of an offshore wind turbine pile. df ' represents the coincidence interval of the f-th fatigue data of offshore wind turbine pile, f∈[1,4].

[0037] The structural state conformity index of offshore wind turbine piles under various operating conditions is analyzed, and its specific calculation formula is P. d =Dd +Y d , where Y d This represents the scour compliance index for various operating conditions of offshore wind turbine piles.

[0038] In the above embodiments, the scour compliance index of each working condition of the offshore wind turbine pile is specifically analyzed as follows: Based on the number of surrounding scour pits, the number of gravel, and the gravel particle size of each working condition of the offshore wind turbine pile, the number of surrounding scour pits, the number of gravel, and the gravel particle size of each working condition of the offshore wind turbine pile are compared with the safe ranges for the number of surrounding scour pits, the number of gravel, and the gravel particle size of the offshore wind turbine pile stored in the database. If the number of surrounding scour pits, the number of gravel, and the gravel particle size of a certain working condition of the offshore wind turbine pile are within the safe range, then the scour compliance index of that working condition of the offshore wind turbine pile is recorded as 1; otherwise, it is recorded as -1, thereby obtaining the scour compliance index Y of each working condition of the offshore wind turbine pile. d , where Y d The values ​​include 1 and -1.

[0039] Step 2: Stability analysis of the wind farm: Based on the obtained operating compliance index of each working condition of the offshore wind turbine, the abnormal working conditions of the offshore wind turbine are screened.

[0040] In the above embodiments, the specific analysis method for screening abnormal operating conditions of offshore wind turbine piles is as follows: based on the obtained operating compliance index of each operating condition of the offshore wind turbine piles, the operating compliance index of each operating condition of the offshore wind turbine piles is compared with the operating compliance index threshold of the operating conditions of the offshore wind turbine piles stored in the database. If the operating compliance index of a certain operating condition of the offshore wind turbine piles is less than the operating compliance index threshold, it indicates that the operating condition is abnormal and is recorded as an abnormal operating condition, thereby obtaining the abnormal operating conditions of the offshore wind turbine piles. Conversely, it indicates that the operating condition is normal.

[0041] Step 3: Wind farm stability monitoring and early warning: Based on the abnormal operating conditions of the offshore wind turbines, analyze the stability status of the offshore wind turbines and issue early warnings.

[0042] In the above embodiments, the specific analysis method for analyzing the stability state of offshore wind turbine piles and providing early warnings is as follows: Based on the obtained abnormal operating conditions of the offshore wind turbine piles, the environmental load compliance index, operating status compliance index, and structural status compliance index of the offshore wind turbine piles corresponding to each abnormal operating condition are collected. If the environmental load compliance index of a certain abnormal operating condition of the offshore wind turbine pile is greater than or equal to the environmental load compliance index safety threshold, the operating status compliance index is greater than or equal to the operating status compliance index safety threshold, and the structural status compliance index is greater than or equal to the structural status compliance index safety threshold, then the stability value of the offshore wind turbine pile is recorded as 1, indicating that the offshore wind turbine pile is in a stable state. If the environmental load compliance index of a certain abnormal operating condition of the offshore wind turbine pile is less than the environmental load compliance index safety threshold, the operating status compliance index is less than the operating status compliance index safety threshold, or the structural status compliance index is less than the structural status compliance index safety threshold, then the stability value of the offshore wind turbine pile is recorded as -1, indicating that the offshore wind turbine pile is in an unstable state. The monitoring frequency is increased, scour prevention and construction protection are carried out, and early warnings are issued.

[0043] It should be noted that the methods for scour prevention and construction protection are as follows: pre-laying an anti-scour layer: laying a crushed stone cushion layer before pile driving; construction disturbance control: avoiding excessive pore pressure rise or sediment accumulation caused by pile driving; temporary monitoring equipment deployment: deploying sonar, ADCP or camera systems to assist in monitoring the underwater state during the construction period.

[0044] Reference Figure 2 As shown, the present invention provides a system for stability monitoring of offshore wind turbine piles, characterized in that it includes: a wind farm stability data acquisition module: by acquiring data from offshore wind turbine piles, obtaining offshore wind turbine pile working data, and then evaluating the working operation compliance index of offshore wind turbine piles under various working conditions.

[0045] Wind farm stability analysis module: Based on the obtained operating compliance index of offshore wind turbines under various operating conditions, it filters out abnormal operating conditions of offshore wind turbines.

[0046] Wind farm stability monitoring and early warning module: Based on the abnormal operating conditions of offshore wind turbine piles, analyze the stability status of offshore wind turbine piles and provide early warning prompts.

[0047] The above content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, and all such modifications and additions should fall within the protection scope of the present invention.

Claims

1. A method for stability monitoring of offshore wind turbine piles, characterized in that, include: Step 1: Wind Farm Stability Data Acquisition: By collecting data from offshore wind turbine piles, the working data of the offshore wind turbine piles are obtained, and then the working operation compliance index of the offshore wind turbine piles under various working conditions is evaluated. Step 2: Stability analysis of the wind farm: Based on the obtained operating compliance index of each working condition of the offshore wind turbine, the abnormal working conditions of the offshore wind turbine are screened. Step 3: Wind farm stability monitoring and early warning: Based on the abnormal operating conditions of the offshore wind turbines, analyze the stability status of the offshore wind turbines and issue early warnings.

2. The stability monitoring method for offshore wind turbine piles according to claim 1, characterized in that, The offshore wind turbine pile working data includes load data, foundation data, fatigue data, and scour data.

3. The stability monitoring method for offshore wind turbine piles according to claim 2, characterized in that, The specific analysis method for evaluating the operational compliance index of offshore wind turbine piles under various working conditions is as follows: Based on the obtained load data, foundation data, fatigue data, and scour data, the load data includes: the horizontal displacement length at the top of the offshore wind turbine pile, the bending moment value of the pile body, and the material strength value at each time period for each working condition. The foundation data includes: the pore pressure value, embedment value, and horizontal bearing capacity value of each soil layer for each working condition of the offshore wind turbine pile. The fatigue data includes: the fatigue life duration, corrosion resistance value, residual corrosion thickness, and scour pit depth for each working condition of the offshore wind turbine pile. The scour data includes: the number of scour pits around the offshore wind turbine pile, the amount of gravel, and the gravel particle size for each working condition. The environmental load compliance index M for each working condition of the offshore wind turbine pile is analyzed. d The operating status conforms to the index N d The structural state conforms to the index P. d This allows for the evaluation of the operational compliance index of offshore wind turbine piles under various operating conditions. The specific calculation formula is: β d =M d +N d +P d Where d represents the number of each working condition, d = 1, 2, ..., k, and k represents the number of working conditions.

4. The stability monitoring method for offshore wind turbine piles according to claim 3, characterized in that, The environmental load compliance index for each operating condition of the offshore wind turbine pile is analyzed using the following method: Based on the obtained horizontal displacement length at the top of the offshore wind turbine pile, bending moment value, and material strength value for each time period under each working condition, these values ​​are compared with the compliance values ​​for the same values ​​stored in the database. If the horizontal displacement length at the top of the pile under a certain working condition is greater than or equal to the compliance value, the bending moment value is greater than or equal to the compliance value, and the material strength value is greater than or equal to the compliance value, then the environmental load compliance index for that working condition is recorded as 1; otherwise, it is recorded as -1. This yields the environmental load compliance index M for each working condition of the offshore wind turbine pile. d , of which M d The values ​​include 1 and -1.

5. The stability monitoring method for offshore wind turbine piles according to claim 3, characterized in that, The operating status of the offshore wind turbine piles under various working conditions conforms to the index, and the specific analysis method is as follows: Based on the obtained pore pressure, embedment, and horizontal bearing capacity values ​​of each soil layer under various working conditions of offshore wind turbine piles, these values ​​are compared with the reference values ​​for pore pressure, embedment, and horizontal bearing capacity stored in the database. If the pore pressure value of a soil layer under a certain working condition of the offshore wind turbine pile is less than the reference value, the embedment value is greater than or equal to the reference value, and the horizontal bearing capacity value is greater than or equal to the reference value, then the operating state compliance index for that working condition of the offshore wind turbine pile is recorded as 1; otherwise, it is recorded as -1. This yields the operating state compliance index N for each working condition of the offshore wind turbine pile. d , where N d The values ​​include 1 and -1.

6. The stability monitoring method for offshore wind turbine piles according to claim 3, characterized in that, The structural state conforms to the index for each working condition of the offshore wind turbine pile, and the specific analysis method is as follows: Based on the obtained fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth of offshore wind turbine piles under various working conditions, and extracting the safe ranges for fatigue life duration, corrosion resistance strength value, residual corrosion thickness, and scour pit depth of offshore wind turbine piles from the database, the fatigue compliance index for each working condition of offshore wind turbine piles is analyzed. The specific calculation formula is as follows: S df S represents the fatigue data of the f-th condition under the d-th working condition of an offshore wind turbine pile. df ' represents the conformity interval of the f-th fatigue data of offshore wind turbine pile, where f∈[1,4]; The structural state conformity index of offshore wind turbine piles under various operating conditions is analyzed, and its specific calculation formula is P. d =D d +Y d , where Y d This represents the scour compliance index for various operating conditions of offshore wind turbine piles.

7. The stability monitoring method for offshore wind turbine piles according to claim 6, characterized in that, The scour compliance index for each operating condition of the offshore wind turbine piles is analyzed using the following method: Based on the number of surrounding scour pits, the amount of gravel, and the gravel particle size for each operating condition of the offshore wind turbine, these parameters are compared with the safe ranges for the number of surrounding scour pits, the amount of gravel, and the particle size stored in the database. If the number of surrounding scour pits, the amount of gravel, and the particle size of a certain operating condition of the offshore wind turbine are within the safe ranges, the scour compliance index for that operating condition is recorded as 1; otherwise, it is recorded as -1. This yields the scour compliance index Y for each operating condition of the offshore wind turbine. d , where Y d The values ​​include 1 and -1.

8. The stability monitoring method for offshore wind turbine piles according to claim 3, characterized in that, The specific analysis method for the various abnormal operating conditions of the offshore wind turbine piles is as follows: Based on the obtained operational compliance index of each working condition of the offshore wind turbine, the operational compliance index of each working condition of the offshore wind turbine is compared with the operational compliance index threshold of the offshore wind turbine stored in the database. If the operational compliance index of a certain working condition of the offshore wind turbine is less than the operational compliance index threshold, it indicates that the working condition is an abnormal state and is recorded as an abnormal working condition. Thus, the abnormal working conditions of the offshore wind turbine are obtained. Conversely, if the index is greater than the threshold, it indicates that the working condition is a normal state.

9. A stability monitoring method for offshore wind turbine piles according to claim 8, characterized in that, The analysis method for determining the stability status of offshore wind turbine piles and issuing early warnings is as follows: Based on the obtained abnormal operating conditions of offshore wind turbine piles, the environmental load compliance index, operational status compliance index, and structural status compliance index of the offshore wind turbine piles corresponding to each abnormal operating condition are collected. If the environmental load compliance index, operational status compliance index, and structural status compliance index of an offshore wind turbine pile under a certain abnormal operating condition are greater than or equal to the environmental load compliance index safety threshold, respectively, and the structural status compliance index is greater than or equal to the structural status compliance index safety threshold, then the stability value of the offshore wind turbine pile is recorded as 1, indicating that the offshore wind turbine pile is in a stable state. If the environmental load compliance index, operational status compliance index, or structural status compliance index of an offshore wind turbine pile under a certain abnormal operating condition are less than the environmental load compliance index safety threshold, respectively, or the structural status compliance index is less than the structural status compliance index safety threshold, then the stability value of the offshore wind turbine pile is recorded as -1, indicating that the offshore wind turbine pile is in an unstable state. In this case, the monitoring frequency is increased, scour prevention and construction protection are implemented, and early warning is issued.

10. A system for performing the stability monitoring method for offshore wind turbine piles according to any one of claims 1-9, characterized in that, include: Wind farm stability data acquisition module: By collecting data from offshore wind turbine piles, the module obtains the working data of the offshore wind turbine piles and then evaluates the working operation compliance index of the offshore wind turbine piles under various working conditions. Wind farm stability analysis module: Based on the obtained operating compliance index of offshore wind turbines under various operating conditions, it filters out various abnormal operating conditions of offshore wind turbines. Wind farm stability monitoring and early warning module: Based on the abnormal operating conditions of offshore wind turbine piles, analyze the stability status of offshore wind turbine piles and provide early warning prompts.

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