Method and apparatus for component optimization of an offshore wind turbine jacket

Abstract

The application discloses a kind of offshore wind turbine jacket component optimization method and device, it is related to jacket component optimization field.The application makes the lower root opening size and steel pipe pile size of jacket be linked with the geological data and rated equipment data of offshore wind turbine, so that the lower root opening size and steel pipe pile size of jacket are more in line with the actual demand of offshore wind turbine, to improve the optimization accuracy of the lower root opening size and steel pipe pile size of offshore wind turbine jacket.Through the construction of minimum independent size variable group, the construction size of jacket can be comprehensively constrained, so that the optimization of component cross-sectional size is more accurate, and the optimization accuracy of the component cross-sectional size of offshore wind turbine jacket is improved.The lower root opening, steel pipe pile and component cross-sectional size in offshore wind turbine jacket are iteratively optimized, the component optimization accuracy of offshore wind turbine jacket is improved, and the stable operation of offshore wind turbine is ensured.

Description

Technical Field

[0001] The present invention belongs to the field of jacket component optimization, and in particular relates to a method and device for optimizing components of an offshore wind turbine jacket. Background Art

[0002] With the continued development of marine resources, offshore platforms are becoming increasingly widespread in their construction and application. Jacket structures, originating from offshore oil production, are fixed marine engineering structures with advantages such as large deck area, high variable load capacity, and structural safety and reliability. They are widely used on offshore oil production platforms. In recent years, offshore wind power has gradually expanded into deep waters. Jacket foundations, with their excellent stiffness and adaptability to water depths, are increasingly being used in offshore wind turbine foundations.

[0003] Due to the particularity and complexity of the working loads on the jacket in the marine environment, a large number of calculations need to be performed in the jacket design environment to determine the size selection of each structural component. However, in the current design process of the jacket for offshore wind turbines, the diameter, thickness and height of the tower in the jacket are calculated based on the information of the ocean and the wind turbine, thereby completing the intelligent design of the jacket. However, this method is limited to the wind turbine information, ocean information and tower size, resulting in the jacket component optimization being not comprehensive and accurate. Another method is to collect data and perform knowledge distillation to obtain the jacket component optimization, but this method is limited by the collected data and cannot accurately optimize the jacket components according to the actual working environment of the offshore wind turbine. Therefore, there is an urgent need for a new component optimization method and device for the jacket for offshore wind turbines to solve the defects of the existing technology. Summary of the Invention

[0004] The present invention aims to provide a component optimization method and device for an offshore wind turbine jacket to solve the above-mentioned technical problems. By using offshore wind turbine data and a minimum independent size variable group, the lower root opening size, steel pipe pile size, and component cross-sectional size of the jacket are optimized, thereby improving the accuracy of component optimization of the offshore wind turbine jacket.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a component optimization method for an offshore wind turbine jacket, comprising:

[0006] Obtain hydrological data, geological data, and rated equipment data for offshore wind turbines;

[0007] Determine the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data;

[0008] Construct the minimum independent size variable group of the jacket according to the preset offshore wind turbine structural requirements;

[0009] Determining the cross-sectional dimensions of the components of the jacket according to the minimum independent dimension variable group;

[0010] According to the lower root opening size, steel pipe pile size and component cross-sectional size, combined with the hydrological data, geological data and rated equipment data of the offshore wind turbine, the components of the offshore wind turbine jacket are optimized and verified to obtain the optimal offshore wind turbine jacket.

[0011] It can be understood that, compared to the prior art, the present invention optimizes the lower root opening and steel pipe pile dimensions of the jacket using offshore wind turbine geological data and rated equipment data. This aligns the jacket lower root opening and steel pipe pile dimensions with the offshore wind turbine's geological data and rated equipment data, making them more consistent with the actual requirements of the offshore wind turbine, thereby improving the accuracy of the optimization of the jacket lower root opening and steel pipe pile dimensions. By constructing a minimum independent size variable group, comprehensive constraints can be placed on the jacket component dimensions, thereby more accurately optimizing the component cross-sectional dimensions and improving the accuracy of the optimization of the jacket component cross-sectional dimensions. Using the offshore wind turbine's hydrological data, geological data, and rated equipment data, the present invention iteratively optimizes the core dimensions of the jacket lower root opening, steel pipe piles, and component cross-sectional dimensions of the offshore wind turbine jacket, improving the accuracy of the jacket component optimization, ensuring that the resulting jacket better meets the operational requirements of the offshore wind turbine and ensuring stable operation of the offshore wind turbine.

[0012] As a preferred solution, determining the lower root opening size and steel pipe pile size of the jacket based on the geological data and rated equipment data specifically includes:

[0013] Determine the lower root opening size of the jacket according to the rated equipment data;

[0014] Determine the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method and enumeration method, and then determine the diameter of the steel pipe piles of the jacket;

[0015] Determining the length of the steel pipe piles of the jacket based on the diameter of the steel pipe piles of the jacket and in combination with the geological data;

[0016] The size of the steel pipe pile of the jacket is obtained according to the pile diameter and the pile length of the steel pipe pile of the jacket.

[0017] This preferred solution optimizes the lower root opening size and steel pipe pile size of the jacket through the geological data and rated equipment data of the offshore wind turbine, so that the lower root opening size and steel pipe pile size of the jacket are linked to the geological data and rated equipment data of the offshore wind turbine, making the lower root opening size and steel pipe pile size of the jacket more in line with the actual needs of the offshore wind turbine, thereby improving the optimization accuracy of the lower root opening size and steel pipe pile size of the offshore wind turbine jacket.

[0018] As a preferred solution, the method of determining the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method and the enumeration method, and then determining the diameter of the steel pipe piles of the jacket, specifically includes:

[0019] The pre-selected pile diameter set is screened using the enumeration method, and the offshore wind turbine frequency corresponding to the selected candidate pile diameters is verified to obtain the initial pile diameter;

[0020] According to the preset first optimization method, the length and wall thickness of the slurry legs of the jacket are determined in combination with the initial pile diameter, and then the diameter of the steel pipe piles of the jacket is determined.

[0021] This preferred solution optimizes and enumerates the length and wall thickness of the jacket's grouting legs, thereby making the jacket's steel pipe pile diameter more consistent with the operating requirements of offshore wind turbines, thereby improving the accuracy of the optimization of the jacket's steel pipe pile size for offshore wind turbines.

[0022] As a preferred solution, the preset first optimization method is used to determine the length and wall thickness of the grouting legs of the jacket in combination with the initial pile diameter, thereby determining the diameter of the steel pipe piles of the jacket, specifically including:

[0023] Determine the jacket grouting section size limit table based on the preset offshore wind turbine structural requirements and the initial pile diameter;

[0024] Constructing an expression for radial contact pressure of the jacket grouting section according to the jacket grouting section size restriction table;

[0025] Determine the jacket leg wall thickness and the first pile diameter according to the jacket grouting section radial contact pressure expression;

[0026] Constructing an expression for the axial bearing capacity of the jacket grouting section according to the jacket grouting section size restriction table;

[0027] Determine the jacket grouting leg length and the second pile diameter based on the jacket grouting section axial bearing capacity expression and the first pile diameter;

[0028] The diameter of the steel pipe piles of the jacket is determined according to the second pile diameter.

[0029] This preferred solution optimizes and enumerates the length and wall thickness of the jacket's grouting legs, thereby making the jacket's steel pipe pile diameter more consistent with the operating requirements of offshore wind turbines, thereby improving the accuracy of the optimization of the jacket's steel pipe pile size for offshore wind turbines.

[0030] As a preferred solution, the determining of the length of the steel pipe piles of the jacket based on the diameter of the steel pipe piles of the jacket in combination with the geological data specifically includes:

[0031] Constructing an axial bearing capacity expression and an anti-pull bearing capacity expression of the jacket according to the geological data;

[0032] According to the axial bearing capacity expression and the anti-pull bearing capacity expression, combined with the steel pipe pile diameter of the jacket, the preset steel pipe pile length is iteratively optimized using the dichotomy method to obtain the steel pipe pile length of the jacket.

[0033] This preferred solution constructs expressions for the axial bearing capacity and the anti-pullout bearing capacity of the jacket using geological data, so as to iteratively optimize the length of the jacket's steel pipe piles. This makes the jacket's steel pipe pile length more consistent with the operating requirements of offshore wind turbines, thereby improving the accuracy of the optimization of the jacket's steel pipe pile size.

[0034] As a preferred solution, the minimum independent size variable group of the jacket is constructed according to the preset offshore wind turbine structural requirements, specifically including:

[0035] Obtain the variation range of the outer diameter and wall thickness of the round tube in the jacket according to the preset offshore wind turbine structural requirements;

[0036] Obtain the upper limit of the wall thickness difference between adjacent wall thickness segments on the main legs and diagonal braces of the jacket according to the preset offshore wind turbine structural requirements;

[0037] A minimum independent size variable group of the jacket is constructed according to the variation range and the upper limit of the wall thickness difference.

[0038] This preferred solution constructs a minimum independent size variable group by taking into account the variation range of the outer diameter and wall thickness of the circular tubes in the jacket and the upper limit of the wall thickness difference between adjacent wall thickness segments on the main legs and the diagonal braces. This can constrain the jacket components, thereby ensuring the optimization accuracy of the cross-sectional dimensions of the jacket components.

[0039] As a preferred solution, determining the cross-sectional dimensions of the jacket component according to the minimum independent dimension variable group specifically includes:

[0040] The minimum independent size variable group is used as a driving parameter, and a calculation model is established in combination with a preset component maximum stress ratio, a component minimum stress ratio, and a component fatigue damage target range;

[0041] Iterate and evaluate the preset initial component cross-sectional dimensions of the jacket according to the calculation model to obtain an evaluation result;

[0042] When the evaluation result meets the preset threshold requirement, the iteration of the preset initial component cross-sectional size is completed to obtain the component cross-sectional size of the jacket.

[0043] This preferred solution can comprehensively constrain the component sizes of the jacket through the minimum independent size variable group, thereby making the optimization of the component cross-sectional dimensions more accurate and improving the accuracy of the optimization of the component cross-sectional dimensions of the offshore wind turbine jacket.

[0044] As a preferred solution, the iterative evaluation of the preset initial component cross-sectional dimensions of the jacket according to the calculation model to obtain the evaluation results specifically includes:

[0045] The preset initial component cross-sectional dimensions include: initial circular tube component cross-sectional dimensions;

[0046] The outer diameter and wall thickness of the initial circular tube component cross-sectional dimensions are iterated and evaluated in sequence according to the calculation model to obtain a wave and flow load evaluation result of the initial circular tube component cross-sectional dimensions.

[0047] This preferred solution can comprehensively constrain the component sizes of the jacket through the minimum independent size variable group, thereby making the optimization of the component cross-sectional dimensions more accurate and improving the accuracy of the optimization of the component cross-sectional dimensions of the offshore wind turbine jacket.

[0048] As a preferred solution, the components of the offshore wind turbine jacket are optimized and verified based on the lower root opening size, steel pipe pile size, and component cross-sectional size, combined with the hydrological data, geological data, and rated equipment data of the offshore wind turbine, to obtain the optimal offshore wind turbine jacket, specifically including:

[0049] Obtain several calibration indicators for offshore wind turbine jackets based on hydrological data, geological data, and rated equipment data of offshore wind turbines;

[0050] constructing an initial jacket of the offshore wind turbine according to the lower root opening size, steel pipe pile size and component cross-sectional size;

[0051] The initial jacket is verified according to each verification index, and the lower root opening size, steel pipe pile size and component cross-sectional size are optimized according to the verification results, so that the initial jacket of the offshore wind turbine meets each verification index, thereby obtaining an optimal jacket for the offshore wind turbine.

[0052] This preferred solution uses the hydrological data, geological data and rated equipment data of the offshore wind turbine to iteratively optimize the lower root opening, steel pipe piles and component cross-sectional dimensions, which are the most core parts of the offshore wind turbine jacket. This improves the component optimization accuracy of the offshore wind turbine jacket, making the resulting offshore wind turbine jacket more in line with the operating requirements of the offshore wind turbine and ensuring the stable operation of the offshore wind turbine.

[0053] Accordingly, an embodiment of the present invention provides a component optimization device for an offshore wind turbine jacket, comprising: an offshore wind turbine data acquisition module, a lower root opening and steel pipe pile size calculation module, a minimum independent size variable group calculation module, a component cross-section size calculation module, and an optimal jacket construction module;

[0054] Wherein, the offshore wind turbine data acquisition module is used to acquire hydrological data, geological data and rated equipment data of the offshore wind turbine;

[0055] The lower root opening and steel pipe pile size calculation module is used to determine the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data;

[0056] The minimum independent size variable group calculation module is used to construct the minimum independent size variable group of the jacket according to the preset offshore wind turbine structural requirements;

[0057] The component cross-sectional size calculation module is used to determine the component cross-sectional size of the jacket according to the minimum independent size variable group;

[0058] The optimal jacket construction module is used to optimize and verify the components of the offshore wind turbine jacket based on the lower root opening size, steel pipe pile size and component cross-sectional size, combined with the hydrological data, geological data and rated equipment data of the offshore wind turbine, to obtain the optimal jacket for the offshore wind turbine.

[0059] It can be understood that, compared to existing technologies, this device optimizes the lower root opening and steel pipe pile dimensions of the jacket using offshore wind turbine geological data and rated equipment data. This aligns the jacket lower root opening and steel pipe pile dimensions with the offshore wind turbine's geological data and rated equipment data, making them more consistent with the actual requirements of the offshore wind turbine, thereby improving the accuracy of the optimization of the jacket lower root opening and steel pipe pile dimensions. By constructing a minimum independent size variable group, the jacket's construction dimensions can be comprehensively constrained, resulting in more accurate optimization of component cross-sectional dimensions and improving the accuracy of the optimization of the jacket's component cross-sectional dimensions. Using the offshore wind turbine's hydrological data, geological data, and rated equipment data, the core dimensions of the jacket's lower root opening, steel pipe piles, and component cross-sectional dimensions are iteratively optimized. This improves the accuracy of the jacket's component optimization, ensuring that the resulting jacket better meets the operational requirements of the offshore wind turbine and ensuring stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 : A flowchart of the steps of a component optimization method for an offshore wind turbine jacket provided by an embodiment of the present invention;

[0061] Figure 2: A schematic diagram of a grouting structure of an offshore wind turbine jacket provided by an embodiment of the present invention;

[0062] Figure 3 : A schematic diagram of independent size variables of an offshore wind turbine jacket provided by an embodiment of the present invention;

[0063] Figure 4 : A flow chart of an offshore wind turbine jacket optimization algorithm provided by an embodiment of the present invention;

[0064] Figure 5 : A schematic structural diagram of a component optimization device for an offshore wind turbine jacket provided by an embodiment of the present invention;

[0065] Among them, 201: offshore wind turbine data acquisition module; 202: lower root opening and steel pipe pile size calculation module; 203: minimum independent size variable group calculation module; 204: component section size calculation module; 205: optimal jacket construction module. DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0067] Jacket structures, originating from offshore oil production, are fixed marine engineering structures with advantages such as large deck area, high variable load capacity, and structural safety and reliability. In recent years, offshore wind power has gradually expanded into deep waters. Jacket foundations, with their excellent stiffness and adaptability to water depths, are increasingly being used in offshore wind turbine foundations.

[0068] Due to the unique and complex nature of the marine environment and the loads experienced by jackets, every aspect of jacket design requires extensive numerical calculations, using quantitative analysis to support the sizing of every structural component. Key steps in jacket design that require computational support include overall structural layout, selection of structural component cross-sections, pile foundation selection, and grouting connection design. An offshore wind turbine jacket consists of an outer platform, ladder and cage, anti-drop device, mooring components, sacrificial anodes, main legs, cable sheath, grouting lines, grouting connections, guide tips, upper transition section, intermediate platform, and X-bracing.

[0069] The overall structural layout of the jacket structure requires the reasonable determination of the upper and lower root openings of the jacket main legs and the number of X-braces based on the water depth and wave height information of the offshore wind farm site, so that the stress on the jacket frame and steel pipe piles reaches a reasonable state; the selection of structural component cross-sections includes determining the parameters such as the outer diameter, wall thickness, and tapered length of each cross-section based on the stress conditions of each jacket component, so that each component can obtain the lowest total structural weight while meeting control conditions such as strength, stability, node shearing, fatigue, and overall frequency; the pile foundation selection includes determining the pile diameter, pile length, and pile construction method based on the pile foundation bearing capacity requirements of the jacket foundation and the geological parameters of the machine site, so that the pile foundation engineering volume is optimized and the overall frequency can meet the design requirements; the grouting connection design is the design of high-strength concrete grouting between the nested connections with the steel pipe piles. The grouting connection section needs to meet the axial and bending bearing capacity requirements. The pile diameter, tip wall thickness, and pile top wall thickness are all related control variables.

[0070] Therefore, in the above-mentioned structural composition of the offshore wind turbine jacket, technicians have proposed an offshore wind turbine jacket design method based on artificial intelligence. This method trains the artificial intelligence regression model through the hydrological and wind turbine parameters of the offshore wind turbine, but fails to consider the impact of geological conditions on the structure. It is also limited to the tower diameter, thickness and height, and fails to optimize the complex foundation type of the jacket foundation. Technicians have also proposed another offshore wind turbine jacket design method that combines knowledge distillation with transfer learning, but this method relies on public data sets for knowledge distillation and cannot guarantee that the designed offshore wind turbine jacket meets actual standards. Therefore, based on the above-mentioned defects of the prior art and combined with the structural composition of the offshore wind turbine jacket, the embodiment of the present invention proposes a component optimization method and device for the offshore wind turbine jacket. For details, please refer to Example 1 and Example 2 below.

[0071] Example 1

[0072] Please refer to Figure 1 , which is a flowchart of a component optimization method for an offshore wind turbine jacket provided by an embodiment of the present invention, including steps S101-S105.

[0073] Step S101: Acquire hydrological data, geological data, and rated equipment data of an offshore wind turbine.

[0074] In an optional embodiment, the hydrological data of the offshore wind turbine include: water level, wind, wave, current, machine site coordinates, wave numerical model point coordinates, wind rose diagram, wave rose diagram, wave scatter diagram and wave numerical model parameters; the geological data of the offshore wind turbine include: seismic acceleration, seawater resistivity, machine site mud surface elevation, seismic response spectrum curve and drilling parameter table; the rated equipment data of the offshore wind turbine include: load calculation foundation top elevation, large component weight, large component center of mass coordinates, large component moment of inertia, extreme working condition foundation load, power generation condition foundation load, equivalent fatigue load, whole machine frequency window, tower equivalent density, tower geometry and tower concentrated additional mass distribution;

[0075] Step S102: determining the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data.

[0076] In this embodiment, determining the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data specifically includes:

[0077] Determine the lower root opening size of the jacket according to the rated equipment data;

[0078] Determine the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method and enumeration method, and then determine the diameter of the steel pipe piles of the jacket;

[0079] Determining the length of the steel pipe piles of the jacket based on the diameter of the steel pipe piles of the jacket and in combination with the geological data;

[0080] The size of the steel pipe pile of the jacket is obtained according to the pile diameter and the pile length of the steel pipe pile of the jacket.

[0081] This embodiment optimizes the lower root opening size and steel pipe pile size of the jacket using geological data and rated equipment data of the offshore wind turbine, so that the lower root opening size and steel pipe pile size of the jacket are linked to the geological data and rated equipment data of the offshore wind turbine, making the lower root opening size and steel pipe pile size of the jacket more in line with the actual requirements of the offshore wind turbine, thereby improving the accuracy of the optimization of the lower root opening size and steel pipe pile size of the offshore wind turbine jacket.

[0082] Please refer to Figure 2 , is a schematic diagram of a grouting structure of an offshore wind turbine jacket provided by an embodiment of the present invention; wherein, R JL is the outer radius of the jacket leg (i.e. grouting leg), t JL is the wall thickness of the jacket leg, R p is the outer radius of the jacket steel pipe pile, t p is the wall thickness of the jacket steel pipe pile, t g is the wall thickness of the jacket grouting slurry, s is the jacket shear key spacing, and L is the length of the jacket steel pipe pile.

[0083] In this embodiment, the method of determining the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method and the enumeration method, and then determining the diameter of the steel pipe piles of the jacket, specifically includes:

[0084] The pre-selected pile diameter set is screened using the enumeration method, and the offshore wind turbine frequency corresponding to the selected candidate pile diameters is verified to obtain the initial pile diameter;

[0085] According to the preset first optimization method, the length and wall thickness of the slurry legs of the jacket are determined in combination with the initial pile diameter, and then the diameter of the steel pipe piles of the jacket is determined.

[0086] This embodiment optimizes and enumerates the length and wall thickness of the grouting legs of the jacket, so that the diameter of the steel pipe piles of the jacket is more in line with the operating requirements of the offshore wind turbine, thereby improving the accuracy of the optimization of the steel pipe pile size of the offshore wind turbine jacket.

[0087] In an optional embodiment, the pre-selected pile diameter set is first screened by enumeration method to verify whether the whole machine frequency is within the frequency window given by the wind turbine manufacturer, and the initial pile diameter is obtained.

[0088] In this embodiment, the method of determining the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method in combination with the initial pile diameter, and then determining the diameter of the steel pipe piles of the jacket, specifically includes:

[0089] Determine the jacket grouting section size limit table based on the preset offshore wind turbine structural requirements and the initial pile diameter;

[0090] Constructing an expression for radial contact pressure of the jacket grouting section according to the jacket grouting section size restriction table;

[0091] Determine the jacket leg wall thickness and the first pile diameter according to the jacket grouting section radial contact pressure expression;

[0092] Constructing an expression for the axial bearing capacity of the jacket grouting section according to the jacket grouting section size restriction table;

[0093] Determine the jacket grouting leg length and the second pile diameter based on the jacket grouting section axial bearing capacity expression and the first pile diameter;

[0094] The diameter of the steel pipe piles of the jacket is determined according to the second pile diameter.

[0095] This embodiment optimizes and enumerates the length and wall thickness of the grouting legs of the jacket, so that the diameter of the steel pipe piles of the jacket is more in line with the operating requirements of the offshore wind turbine, thereby improving the accuracy of the optimization of the steel pipe pile size of the offshore wind turbine jacket.

[0096] In an optional embodiment, please refer to Table 1, which is a table of size limitations of a jacket grouting section provided in an embodiment of the present invention.

[0097] Table 1

[0098]

[0099]

[0100] In some optional implementations of this embodiment, an expression for the axial bearing capacity of the jacket grouting section is constructed based on the jacket grouting section size restriction table, specifically including the calculation process of equations (1) to (11) in the following optional embodiments.

[0101] In an alternative embodiment, the cross-sectional moment of inertia of the jacket grouting leg (leg column) is determined as:

[0102] I JL =π((2R JL ) 4 -(2R JL -2t JL ) 4 ) / 64 (1),

[0103] Among them, I JL is the cross-sectional moment of inertia, R JL is the radius of the jacket grouting leg, t JL is the wall thickness of the jacket leg.

[0104] In an alternative embodiment, the support spring stiffness is determined:

[0105]

[0106] Among them, k rD is the stiffness of the support spring, E is the elastic modulus of the steel (in MPa), R JL is the radius of the jacket grouting leg, t JL is the wall thickness of the jacket leg, R p is the outer radius of the jacket steel pipe pile, t p is the wall thickness of the jacket steel pipe pile, t g is the wall thickness of the jacket grouting slurry, and m is the elastic modulus ratio of steel to high-strength grouting material.

[0107] In an optional embodiment, the elastic length of the steel pipe pile is determined according to the cross-sectional moment of inertia and the stiffness of the supporting spring:

[0108]

[0109] Among them, l e is the elastic length of the steel pipe pile, k rDis the stiffness of the support spring, I JL is the cross-sectional moment of inertia, and E is the elastic modulus of the steel (in MPa).

[0110] In an optional embodiment, the number of effective shear keys of the steel pipe pile under axial force is determined according to the elastic length of the steel pipe pile:

[0111] n=floor[(Lg-sEdge-l e ) / s] (4),

[0112] Among them, n is the number of effective shear keys of the steel pipe pile under axial force, Lg is the total grouting length of the steel pipe pile, sEdge is used to accommodate the fit between the pile driver's bayonet and the inner wall of the pile top, l e is the elastic length of the steel pipe pile, and s is the shear key spacing of the jacket.

[0113] In an optional embodiment, the design load strength per unit length of a single shear key is determined based on the number of effective shear keys of the steel pipe pile under axial force:

[0114]

[0115] Among them, F V is the design load strength per unit length of a single shear key, R JL is the radius of the jacket grouting leg, n is the number of effective shear keys of the steel pipe pile under axial force, and V is the maximum design value of the axial force for each jacket leg and each working condition.

[0116] In an optional embodiment, the radial stiffness is determined according to the jacket grouting section size limit table:

[0117]

[0118] Where k is the radial stiffness, R JL is the outer radius of the jacket leg (i.e. grouting leg), t JL is the wall thickness of the jacket leg, R p is the outer radius of the jacket steel pipe pile, t p is the wall thickness of the jacket steel pipe pile, t g is the wall thickness of the jacket grouting slurry, E is the elastic modulus of the steel (in MPa), and E g is the elastic modulus of the jacket grouting slurry (in MPa).

[0119] In an optional embodiment, the shear strength of the interface of the jacket grouting connection section is determined based on the radial stiffness:

[0120]

[0121] Among them, f bkis the shear strength of the interface of the jacket grouting connection section, R JL is the outer radius of the jacket leg (i.e., grouting leg), h is the minimum height of the shear key, s is the jacket shear key spacing, k is the radial stiffness, f ck It is the characteristic compressive strength of 75mm cubic grouting (in MPa).

[0122] In an optional embodiment, the shear strength of the jacket grouting connection section interface obtained in formula (7) should not exceed the strength value of the slurry at failure obtained in the following formula (8):

[0123]

[0124] Among them, f bk is the shear strength of the jacket grouting connection interface, h is the minimum height of the shear key, s is the jacket shear key spacing, f ck It is the characteristic compressive strength of 75mm cubic grouting (in MPa).

[0125] In an optional embodiment, the characteristic strength per unit length of each shear bond is obtained according to equations (7) and (8):

[0126] F Vcap =f bk s (9),

[0127] Among them, F Vcap is the characteristic strength per unit length of each shear bond, f bk is the shear strength of the jacket grouting connection interface, and s is the jacket shear key spacing.

[0128] In an optional embodiment, the material coefficient is set to 2.0, and the design strength per unit length of each shear key is determined as follows:

[0129] F Vcap,d =F Vcap / 2 (10),

[0130] Among them, F Vcap，d The design strength per unit length of each shear key, F Vcap is the characteristic strength per unit length of each shear bond.

[0131] In an optional embodiment, the expression for the axial bearing capacity of the jacket grouting section is determined based on the design load strength per unit length of a single shear key and the characteristic strength per unit length of each shear key, in combination with the jacket grouting section size restriction table:

[0132] F V ≤F Vcap,d (11),

[0133] Among them, F Vcap,dThe design strength per unit length of each shear key, F V Design load strength per unit length for a single shear key.

[0134] Through the calculation of the above formulas (1) to (11), the expression of the axial bearing capacity of the jacket grouting section can be obtained, thereby determining the grouting leg length of the jacket grouting section of the offshore wind turbine jacket. In this process, the diameter of the jacket steel pipe pile is adjusted so that the diameter of the steel pipe pile meets the grouting requirements of the jacket.

[0135] In certain optional implementations of this embodiment, the jacket grouting section radial contact pressure expression is constructed based on the jacket grouting section size restriction table, specifically including equations (12) to (13) in the following optional embodiments.

[0136] In an optional embodiment, the maximum nominal radial contact pressure is determined based on the bending moment and shear force of the jacket grouting section:

[0137]

[0138] Among them, p rom is the maximum nominal radial contact pressure, l e is the elastic length of the steel pipe pile, k rD is the stiffness of the support spring, I JL is the cross-sectional inertia moment, E is the elastic modulus of steel (in MPa), R JL is the outer radius of the jacket leg (i.e., grouting leg), M0 is the bending moment of the jacket grouting section, and Q0 is the shear force of the jacket grouting section.

[0139] In an optional embodiment, the limiting condition of the maximum nominal radial contact pressure is:

[0140] p nom ≤1.5MPa (13),

[0141] Among them, p rom is the maximum nominal radial contact pressure.

[0142] In an optional embodiment, an expression for the radial contact pressure of the jacket grouting section is constructed based on the maximum nominal radial contact pressure and its restriction conditions of equations (12) and (13) and combined with the jacket grouting section size restriction table.

[0143] It should be noted that according to equations (1) to (3), as well as equation (12), it can be concluded that the bending resistance of the grouting connection section is not related to the height, width, spacing of the shear key, or the compressive strength of the grout, but is related to the relevant parameters of the steel pipe pile and the jacket leg column, as well as the grout elastic modulus. Therefore, in this embodiment, the outer radius of the jacket grouting leg is set as follows:

[0144] R JL =R p -0.25 (14),

[0145] Among them, R JL is the outer radius of the jacket leg (i.e. grouting leg), R p is the outer radius of the jacket steel pipe pile.

[0146] In some optional implementations of this embodiment, determining the jacket leg wall thickness and the first pile diameter according to the jacket grouting section radial contact pressure expression specifically includes:

[0147] According to a preset step size, such as 2 mm, the wall thickness of the jacket grouting leg is adjusted to meet the requirements of formula (13). When the adjusted wall thickness exceeds the leg column geometry limit in the jacket grouting section size limit table, or exceeds the corresponding plate rolling thickness limit (95 mm), it means that there is no feasible solution for bending resistance under the current pile diameter, and the pile diameter needs to be increased.

[0148] The wall thickness of the jacket leg and the first pile diameter are determined according to the adjusted wall thickness of the jacket grouting leg and the corresponding pile diameter.

[0149] In certain optional implementations of this embodiment, determining the jacket grouting leg length and the second pile diameter based on the jacket grouting section axial bearing capacity expression in combination with the first pile diameter specifically includes:

[0150] According to the preset step size, such as 0.1m, on the basis of the first pile diameter, the total grouting length Lg in the jacket is adjusted to meet the requirements of formula (11);

[0151] When the ratio of grouting length to leg diameter exceeds the upper limit in the jacket grouting section size limit table, it means that there is no feasible solution for axial bearing capacity under the current pile diameter, and the pile diameter needs to be increased;

[0152] The total grouting length of the adjusted jacket must be checked to see if it exceeds the designed grouting length of the jacket. If so, the top elevation of the jacket steel pipe piles must be increased.

[0153] The grouting leg length and the second pile diameter of the jacket are determined according to the adjusted total grouting length in the jacket and the corresponding pile diameter.

[0154] It should be noted that, since the adjustment of the wall thickness and the grouting length of the grouting leg is adjusted according to a constant step size, it may occur that the iterative repeated fluctuations cannot converge. Therefore, the embodiment of the present invention also sets memory variables for the adjustment of the wall thickness and the grouting length respectively. When it is found that a certain variable repeatedly increases and decreases, the optimization branch of the variable is shielded, and only the increase branch is executed to ensure that the algorithm can converge to a feasible solution. Among them, the principle of adjusting the grouting length and the wall thickness of the grouting leg according to the memory variable is the same.

[0155] Specifically, taking the wall thickness of the grouting leg as an example, two memory variables, Told and Tnew, are set with initial values ​​of 0 to record the last and last adjustments to the grouting leg wall thickness, respectively. When the wall thickness of the grouting leg increases, Told = Tnew, where Tnew = 1; when the wall thickness of the grouting leg decreases, Told = Tnew, where Tnew = -1. The wall thickness of the grouting leg is allowed to decrease only when Told × Tnew ≠ -1.

[0156] In this embodiment, the determining of the length of the steel pipe piles of the jacket based on the diameter of the steel pipe piles of the jacket in combination with the geological data specifically includes:

[0157] Constructing an axial bearing capacity expression and an anti-pull bearing capacity expression of the jacket according to the geological data;

[0158] According to the axial bearing capacity expression and the anti-pull bearing capacity expression, combined with the steel pipe pile diameter of the jacket, the preset steel pipe pile length is iteratively optimized using the dichotomy method to obtain the steel pipe pile length of the jacket.

[0159] This embodiment constructs expressions for the axial bearing capacity and the anti-pullout bearing capacity of the jacket using geological data, so as to iteratively optimize the length of the jacket's steel pipe piles. This makes the jacket's steel pipe pile length more consistent with the operating requirements of offshore wind turbines, thereby improving the accuracy of the optimization of the steel pipe pile size of the offshore wind turbine jacket.

[0160] In an optional embodiment, the expression for the axial bearing capacity of the jacket specifically includes:

[0161]

[0162] Among them, Q d is the design value of the single pile axial bearing capacity (unit: kN), γ R is the partial coefficient of the axial bearing capacity of a single pile, U is the outer perimeter of the shaft section, q fi is the standard value of the ultimate lateral friction resistance of the i-th layer of soil of a single pile (in kPa), q R is the standard value of the ultimate end resistance of a single pile (in kPa), l iis the length of the pile body passing through the i-th layer of soil (in m), A is the peripheral area of ​​the pile end (in m 2 ), η is the bearing capacity reduction factor.

[0163] In an optional embodiment, the anti-outrush bearing capacity expression of the jacket specifically includes:

[0164]

[0165] Among them, T d is the design value of the ultimate bearing capacity of a single pile (in kN), γ R is the partial coefficient of the axial bearing capacity of a single pile, U is the outer perimeter of the shaft section, ξ i is the reduction factor, q fi is the standard value of the ultimate lateral friction resistance of the i-th layer of soil of a single pile (in kPa), l i is the length of the pile body passing through the i-th layer of soil (in meters), G is the pile weight (in kN), the underwater part is measured by buoyancy, and α is the angle between the pile axis and the vertical.

[0166] It should be noted that, considering the load on each pile and the possible differences in the geological boreholes corresponding to each pile, the initial pile length can be substituted into Equations (15) and (16) for each pile to calculate whether the axial bearing capacity and pull-out bearing capacity meet the requirements. If the bearing capacity does not meet the requirements or there is a surplus, the pile length is iteratively optimized using a binary search method to find the minimum pile length that meets the bearing capacity, thus obtaining the steel pipe pile length of the jacket.

[0167] It should be noted that the orientation of the jacket foundation in the embodiments of the present invention is determined based on the directionality of the load distribution, the pile head force, and the geological bearing capacity. For a four-pile jacket foundation, one side is arranged perpendicular to the direction of strong waves so that the maximum tensile and compressive loads are shared by the two piles.

[0168] In an optional embodiment, the pile length constraints described in the present invention include: the total length of the steel pipe pile must be sufficient for a single lift, typically no longer than 100 meters; and it must meet driveability requirements. If the calculated pile length for the current pile diameter does not meet these constraints, the pile diameter is considered to be larger. To prevent changes in bearing capacity requirements due to subsequent component optimization from affecting the feasibility of the pile foundation, a 1% margin can be added to the actual bearing capacity.

[0169] Step S103: constructing a minimum independent size variable group of the jacket according to preset offshore wind turbine structural requirements.

[0170] In this embodiment, the minimum independent size variable group of the jacket is constructed according to the preset offshore wind turbine structural requirements, specifically including:

[0171] Obtain the variation range of the outer diameter and wall thickness of the round tube in the jacket according to the preset offshore wind turbine structural requirements;

[0172] Obtain the upper limit of the wall thickness difference between adjacent wall thickness segments on the main legs and diagonal braces of the jacket according to the preset offshore wind turbine structural requirements;

[0173] A minimum independent size variable group of the jacket is constructed according to the variation range and the upper limit of the wall thickness difference.

[0174] This embodiment constructs a minimum independent size variable group by taking into account the variation range of the outer diameter and wall thickness of the circular tubes in the jacket and the upper limit of the wall thickness difference between adjacent wall thickness segments on the main legs and the diagonal braces. This constrains the jacket components, thereby ensuring the optimization accuracy of the cross-sectional dimensions of the jacket components.

[0175] In an alternative embodiment, see Figure 3 , is a schematic diagram of independent dimension variables of an offshore wind turbine jacket provided by an embodiment of the present invention; wherein adjacent outer diameter dimensions between coaxial components of the jacket are continuous; D represents the outer diameter dimension, and T represents the wall thickness dimension;

[0176] like Figure 3 As shown in the figure, the independent outer diameter dimension variables need to consider the dimensional continuity between the circular tube components of the jacket. For example, L-3, L-4 and L-5 constitute the transition structure of circular tube-cone-circular tube. Two outer diameter variables D1 and D2 are set to describe the simplest and only outer diameter parameter group for this transition result. The wall thickness parameter group can be set according to each independent pipe segment and needs to be coordinated with the outer diameter and meet the restriction requirements on the wall thickness variation of the adjacent pipe segments of the independent pipe segment.

[0177] Specifically, the preset offshore wind turbine structural requirements include: the circular tube construction requirements in ISO 19902-2020 and DNVGL-RP-C203-2016. In the circular tube construction requirements in ISO 19902-2020, it is necessary to limit 20≤D / T≤60. For the outer diameter ratio of the tube node brace / chord, the effective range is 0.2 to 1.0. Figure 3 D4 / D1 in the figure should be in the range of 0.2 to 1.0. In the DNVGL-RP-C203-2016 specification, the stress concentration factor at the butt weld of the circular tube is positively correlated with the thickness difference on both sides. It is necessary to control the length of the variable wall thickness cut and the stress concentration factor at the variable wall thickness. The wall thickness difference between adjacent wall thickness segments on the main legs and diagonal braces should be set with an upper limit, such as 30mm for the main legs and 15mm for the diagonal braces. Therefore, based on the structural requirements of offshore wind turbines, the variation range of the outer diameter and wall thickness of the circular tube in the jacket and the upper limit of the wall thickness difference between adjacent wall thickness segments on the main legs and diagonal braces are obtained, and then the minimum independent dimension variable group is constructed.

[0178] By constructing a minimum independent size variable group and attaching associated constraints to each size variable, the size of the jacket can be fully defined, and the cross-sectional dimensions of the jacket components can be optimized.

[0179] Step S104: determining the cross-sectional dimensions of the components of the jacket according to the minimum independent dimension variable group.

[0180] In this embodiment, determining the cross-sectional dimensions of the jacket component according to the minimum independent dimension variable group specifically includes:

[0181] The minimum independent size variable group is used as a driving parameter, and a calculation model is established in combination with a preset component maximum stress ratio, a component minimum stress ratio, and a component fatigue damage target range;

[0182] Iterate and evaluate the preset initial component cross-sectional dimensions of the jacket according to the calculation model to obtain an evaluation result;

[0183] When the evaluation result meets the preset threshold requirement, the iteration of the preset initial component cross-sectional size is completed to obtain the component cross-sectional size of the jacket.

[0184] This embodiment can comprehensively constrain the dimensions of the components of the jacket through the minimum independent dimension variable group, thereby making the optimization of the component cross-sectional dimensions more accurate and improving the accuracy of the optimization of the component cross-sectional dimensions of the jacket of the offshore wind turbine.

[0185] In an optional embodiment, a computational model is established through parametric modeling, using the minimum independent dimensional variable group as the driving parameter. The maximum and minimum stress ratios for the components, as well as target fatigue damage ranges, are set, for example, from 1 to 0.75. In each iteration, the model performs ultimate strength, seismic intensity, and fatigue calculations, while monitoring the overall frequency. When the calculated component index value exceeds the upper limit, the relevant dimensional value is strategically strengthened; when it falls below the lower limit, the relevant dimensional value is strategically optimized. This cycle continues until all dimensional values ​​remain unchanged.

[0186] In this embodiment, the predetermined initial component cross-sectional dimensions of the jacket are iterated and evaluated according to the calculation model to obtain an evaluation result, specifically including:

[0187] The preset initial component cross-sectional dimensions include: initial circular tube component cross-sectional dimensions;

[0188] The outer diameter and wall thickness of the initial circular tube component cross-sectional dimensions are iterated and evaluated in sequence according to the calculation model to obtain a wave and flow load evaluation result of the initial circular tube component cross-sectional dimensions.

[0189] It should be noted that in the calculation of wave and current loads, the outer diameter of the circular tube component has a direct impact on the load, while the wall thickness has no effect. Therefore, if all components within the influence range of the outer diameter parameter meet the optimization conditions and all components still meet the structural requirements after the outer diameter optimization, the outer diameter should be optimized first. Otherwise, consider optimizing the local wall thickness. Specifically, Figure 3 As shown, D2's impact range covers components L-4 to L-7. D2 is optimized only when all components L-4 to L-7 meet the optimization criteria. Otherwise, only the wall thickness parameters of each segment are optimized individually. Component outer diameter significantly influences the overall frequency, so it is optimized only when the overall frequency has a margin of 0.4% or greater from the lower limit. If the margin is 0.2% or greater, component wall thickness can be optimized.

[0190] This embodiment can comprehensively constrain the dimensions of the components of the jacket through the minimum independent dimension variable group, thereby making the optimization of the component cross-sectional dimensions more accurate and improving the accuracy of the optimization of the component cross-sectional dimensions of the jacket of the offshore wind turbine.

[0191] Step S105: Optimizing and verifying components of the offshore wind turbine jacket according to the lower root opening size, steel pipe pile size, and component cross-sectional size, combined with hydrological data, geological data, and rated equipment data of the offshore wind turbine, to obtain an optimal jacket for the offshore wind turbine.

[0192] In this embodiment, the components of the offshore wind turbine jacket are optimized and verified based on the lower root opening size, steel pipe pile size, and component cross-sectional size, in combination with the hydrological data, geological data, and rated equipment data of the offshore wind turbine, to obtain the optimal offshore wind turbine jacket, specifically including:

[0193] Obtain several calibration indicators for offshore wind turbine jackets based on hydrological data, geological data, and rated equipment data of offshore wind turbines;

[0194] constructing an initial jacket of the offshore wind turbine according to the lower root opening size, steel pipe pile size and component cross-sectional size;

[0195] The initial jacket is verified according to each verification index, and the lower root opening size, steel pipe pile size and component cross-sectional size are optimized according to the verification results, so that the initial jacket of the offshore wind turbine meets each verification index, thereby obtaining an optimal jacket for the offshore wind turbine.

[0196] This embodiment uses hydrological data, geological data, and rated equipment data of offshore wind turbines to iteratively optimize the lower root opening, steel pipe piles, and component cross-sectional dimensions, which are the most critical components of the offshore wind turbine jacket. This improves the accuracy of component optimization of the offshore wind turbine jacket, making the resulting offshore wind turbine jacket more compatible with the operating requirements of the offshore wind turbine and ensuring the stable operation of the offshore wind turbine.

[0197] In an optional embodiment, the verification indicators include: whole machine frequency, grouting section strength, pile bearing capacity, component extreme working condition (ULS) strength, pipe node extreme working condition (ULS) shear strength, component seismic working condition strength, pipe node seismic working condition shear strength, and weld fatigue; wherein, the verification indicators can be generated by the hydrological data, geological data and rated equipment data of the offshore wind turbine.

[0198] It should be noted that according to the verification indicators, verification is carried out in sequence. When one indicator is not met, the lower root opening, steel pipe piles and component cross-sectional dimensions are re-optimized until each indicator is passed.

[0199] Please note that, please refer to Figure 4 , which is a flow chart of an offshore wind turbine jacket optimization algorithm provided by an embodiment of the present invention, including inputting hydrological data, geological data, and wind turbine data, iterating the lower root opening, pile diameter, and cross-sectional dimensions, and then performing performance verification of the whole machine frequency, grouting section strength, pile bearing capacity, component extreme working condition (ULS) strength, pipe node extreme working condition (ULS) punching strength, component seismic working condition strength, pipe node seismic working condition punching shear strength, and weld fatigue to obtain an optimized offshore wind turbine jacket component.

[0200] During the iteration process of the embodiment of the present invention, the optimization strategies all obtain data from the calculation results of the calculation model of the project. Therefore, the optimization strategies can be set strictly according to the relevant design specifications, are not affected by the characteristics of the reference project, and do not need to evaluate the comparability of the reference project and the current project.

[0201] This embodiment optimizes the lower root opening and steel pipe pile dimensions of the jacket using offshore wind turbine geological data and rated equipment data. This aligns the jacket lower root opening and steel pipe pile dimensions with the offshore wind turbine's geological data and rated equipment data, making them more consistent with the actual requirements of the offshore wind turbine and improving the accuracy of their optimization. By constructing a minimum set of independent dimensional variables, comprehensive constraints can be placed on the jacket's construction dimensions, resulting in more accurate optimization of component cross-sectional dimensions and improving the accuracy of the optimization. Using the offshore wind turbine's hydrological, geological, and rated equipment data, iterative optimization is performed on the core dimensions of the jacket's lower root opening, steel pipe piles, and component cross-sectional dimensions. This improves the accuracy of jacket component optimization, ensuring that the resulting jacket better meets the operational requirements of the offshore wind turbine and ensuring stable operation.

[0202] Example 2

[0203] Please refer to Figure 5, which is a schematic structural diagram of a component optimization device for an offshore wind turbine jacket provided by an embodiment of the present invention, comprising: an offshore wind turbine data acquisition module 201, a lower root opening and steel pipe pile size calculation module 202, a minimum independent size variable group calculation module 203, a component cross-section size calculation module 204, and an optimal jacket construction module 205.

[0204] The offshore wind turbine data acquisition module 201 is used to acquire hydrological data, geological data and rated equipment data of the offshore wind turbine.

[0205] The lower root opening and steel pipe pile size calculation module 202 is used to determine the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data.

[0206] In this embodiment, the lower root opening and steel pipe pile size calculation module 202 includes: a lower root opening and steel pipe pile size calculation unit;

[0207] The lower root opening and steel pipe pile size calculation unit is used to determine the lower root opening size of the jacket according to the rated equipment data;

[0208] Determine the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method and enumeration method, and then determine the diameter of the steel pipe piles of the jacket;

[0209] Determining the length of the steel pipe piles of the jacket based on the diameter of the steel pipe piles of the jacket and in combination with the geological data;

[0210] The size of the steel pipe pile of the jacket is obtained according to the pile diameter and the pile length of the steel pipe pile of the jacket.

[0211] In this embodiment, the lower root opening and steel pipe pile size calculation unit includes: a steel pipe pile diameter calculation subunit;

[0212] The steel pipe pile diameter calculation subunit is used to screen the pre-equipment pile diameter set according to the enumeration method, and verify the offshore wind turbine frequency corresponding to the screened candidate pile diameters to obtain the initial pile diameter;

[0213] According to the preset first optimization method, the length and wall thickness of the slurry legs of the jacket are determined in combination with the initial pile diameter, and then the diameter of the steel pipe piles of the jacket is determined.

[0214] In this embodiment, the steel pipe pile diameter calculation subunit includes: a steel pipe pile diameter calculation component;

[0215] The steel pipe pile diameter calculation component is used to determine the jacket grouting section size limit table according to the preset offshore wind turbine structural requirements and in combination with the initial pile diameter;

[0216] Constructing an expression for radial contact pressure of the jacket grouting section according to the jacket grouting section size restriction table;

[0217] Determine the jacket leg wall thickness and the first pile diameter according to the jacket grouting section radial contact pressure expression;

[0218] Constructing an expression for the axial bearing capacity of the jacket grouting section according to the jacket grouting section size restriction table;

[0219] Determine the jacket grouting leg length and the second pile diameter based on the jacket grouting section axial bearing capacity expression and the first pile diameter;

[0220] The diameter of the steel pipe piles of the jacket is determined according to the second pile diameter.

[0221] In this embodiment, the lower root opening and steel pipe pile size calculation unit includes: a steel pipe pile length calculation subunit;

[0222] The steel pipe pile length calculation subunit is used to construct an axial bearing capacity expression and an anti-pull bearing capacity expression of the jacket according to the geological data;

[0223] According to the axial bearing capacity expression and the anti-pull bearing capacity expression, combined with the steel pipe pile diameter of the jacket, the preset steel pipe pile length is iteratively optimized using the dichotomy method to obtain the steel pipe pile length of the jacket.

[0224] The minimum independent size variable group calculation module 203 is used to construct the minimum independent size variable group of the jacket according to the preset offshore wind turbine structural requirements.

[0225] In this embodiment, the minimum independent size variable group calculation module 203 includes: a minimum independent size variable group calculation unit;

[0226] The minimum independent size variable group calculation unit is used to obtain the variation range of the outer diameter and wall thickness of the circular tube in the jacket according to the preset offshore wind turbine structural requirements;

[0227] Obtain the upper limit of the wall thickness difference between adjacent wall thickness segments on the main legs and diagonal braces of the jacket according to the preset offshore wind turbine structural requirements;

[0228] A minimum independent size variable group of the jacket is constructed according to the variation range and the upper limit of the wall thickness difference.

[0229] The component cross-sectional size calculation module 204 is used to determine the component cross-sectional size of the jacket according to the minimum independent dimension variable group.

[0230] In this embodiment, the component cross-sectional size calculation module 204 includes: a component cross-sectional size calculation unit;

[0231] The component cross-sectional dimension calculation unit is used to use the minimum independent dimension variable group as a driving parameter and establish a calculation model in combination with a preset component maximum stress ratio, a component minimum stress ratio and a component fatigue damage target range;

[0232] Iterate and evaluate the preset initial component cross-sectional dimensions of the jacket according to the calculation model to obtain an evaluation result;

[0233] When the evaluation result meets the preset threshold requirement, the iteration of the preset initial component cross-sectional size is completed to obtain the component cross-sectional size of the jacket.

[0234] In this embodiment, the component cross-sectional size calculation unit includes: a circular tube component cross-sectional size calculation unit;

[0235] The circular tube component cross-sectional size calculation unit is used for the preset initial component cross-sectional size including: initial circular tube component cross-sectional size;

[0236] The outer diameter and wall thickness of the initial circular tube component cross-sectional dimensions are iterated and evaluated in sequence according to the calculation model to obtain a wave and flow load evaluation result of the initial circular tube component cross-sectional dimensions.

[0237] The optimal jacket construction module 205 is used to optimize and verify the components of the offshore wind turbine jacket based on the lower root opening size, steel pipe pile size and component cross-sectional size, combined with the hydrological data, geological data and rated equipment data of the offshore wind turbine, to obtain the optimal jacket of the offshore wind turbine.

[0238] In this embodiment, the optimal jacket construction module 205 includes: an optimal jacket construction unit;

[0239] The optimal jacket construction unit is used to obtain several calibration indicators of the offshore wind turbine jacket based on the hydrological data, geological data and rated equipment data of the offshore wind turbine;

[0240] constructing an initial jacket of the offshore wind turbine according to the lower root opening size, steel pipe pile size and component cross-sectional size;

[0241] The initial jacket is verified according to each verification index, and the lower root opening size, steel pipe pile size and component cross-sectional size are optimized according to the verification results, so that the initial jacket of the offshore wind turbine meets each verification index, thereby obtaining an optimal jacket for the offshore wind turbine.

[0242] This embodiment optimizes the lower root opening and steel pipe pile dimensions of the jacket using offshore wind turbine geological data and rated equipment data. This aligns the jacket lower root opening and steel pipe pile dimensions with the offshore wind turbine's geological data and rated equipment data, making them more consistent with the actual requirements of the offshore wind turbine and improving the accuracy of their optimization. By constructing a minimum set of independent dimensional variables, comprehensive constraints can be placed on the jacket's construction dimensions, resulting in more accurate optimization of component cross-sectional dimensions and improving the accuracy of the optimization. Using the offshore wind turbine's hydrological, geological, and rated equipment data, iterative optimization is performed on the core dimensions of the jacket's lower root opening, steel pipe piles, and component cross-sectional dimensions. This improves the accuracy of jacket component optimization, ensuring that the resulting jacket better meets the operational requirements of the offshore wind turbine and ensuring stable operation.

[0243] In summary, the embodiments of the present invention optimize the lower root opening and steel pipe pile dimensions of the jacket using offshore wind turbine geological data and rated equipment data. This aligns the jacket lower root opening and steel pipe pile dimensions with the offshore wind turbine's geological data and rated equipment data, making them more consistent with the actual requirements of the offshore wind turbine, thereby improving the accuracy of the optimization of the jacket lower root opening and steel pipe pile dimensions. By constructing a minimum independent size variable group, comprehensive constraints can be placed on the jacket's construction dimensions, thereby more accurately optimizing component cross-sectional dimensions and improving the accuracy of the optimization of the jacket's component cross-sectional dimensions. Using the offshore wind turbine's hydrological data, geological data, and rated equipment data, iterative optimization is performed on the core lower root opening, steel pipe pile, and component cross-sectional dimensions of the jacket, improving the accuracy of component optimization for the jacket, ensuring that the resulting jacket better meets the operational requirements of the offshore wind turbine and ensuring stable operation of the offshore wind turbine.

[0244] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A component optimization method for an offshore wind turbine jacket, characterized in that: include: Obtain hydrological data, geological data, and rated equipment data for offshore wind turbines; Determine the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data; Constructing a minimum independent dimension variable group of the jacket according to preset offshore wind turbine structural requirements, including: obtaining a variation range of an outer diameter and a wall thickness of a circular tube in the jacket according to the preset offshore wind turbine structural requirements; obtaining an upper limit of a wall thickness difference between adjacent wall thickness segments on a main leg and a diagonal brace in the jacket according to the preset offshore wind turbine structural requirements; and constructing the minimum independent dimension variable group of the jacket according to the variation range and the upper limit of the wall thickness difference; Determining the cross-sectional dimensions of the components of the jacket according to the minimum independent dimension variable group; According to the lower root opening size, steel pipe pile size and component cross-sectional size, combined with the hydrological data, geological data and rated equipment data of the offshore wind turbine, the components of the offshore wind turbine jacket are optimized and verified to obtain the optimal offshore wind turbine jacket, including: obtaining a number of verification indicators of the offshore wind turbine jacket according to the hydrological data, geological data and rated equipment data of the offshore wind turbine; constructing an initial offshore wind turbine jacket according to the lower root opening size, steel pipe pile size and component cross-sectional size; verifying the initial jacket according to each of the verification indicators, and optimizing the lower root opening size, steel pipe pile size and component cross-sectional size according to the verification result, so that the initial offshore wind turbine jacket meets each of the verification indicators, thereby obtaining the optimal offshore wind turbine jacket.

2. The component optimization method for an offshore wind turbine jacket according to claim 1, characterized in that: Determining the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data specifically includes: Determine the lower root opening size of the jacket according to the rated equipment data; Determine the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method and enumeration method, and then determine the diameter of the steel pipe piles of the jacket; Determining the length of the steel pipe piles of the jacket based on the diameter of the steel pipe piles of the jacket and in combination with the geological data; The size of the steel pipe pile of the jacket is obtained according to the pile diameter and the pile length of the steel pipe pile of the jacket.

3. The component optimization method for an offshore wind turbine jacket according to claim 2, characterized in that: The method of determining the grouting leg length and leg wall thickness of the jacket according to the preset first optimization method and the enumeration method, and then determining the diameter of the steel pipe pile of the jacket, specifically includes: The pre-selected pile diameter set is screened using the enumeration method, and the offshore wind turbine frequency corresponding to the selected candidate pile diameters is verified to obtain the initial pile diameter; According to the preset first optimization method, the length and wall thickness of the slurry legs of the jacket are determined in combination with the initial pile diameter, and then the diameter of the steel pipe piles of the jacket is determined.

4. The component optimization method for an offshore wind turbine jacket according to claim 3, characterized in that: The method of determining the length and wall thickness of the grouting legs of the jacket according to the preset first optimization method and combining the initial pile diameter, and then determining the diameter of the steel pipe piles of the jacket, specifically includes: Determine the jacket grouting section size limit table based on the preset offshore wind turbine structural requirements and the initial pile diameter; Constructing an expression for radial contact pressure of the jacket grouting section according to the jacket grouting section size restriction table; Determine the jacket leg wall thickness and the first pile diameter according to the jacket grouting section radial contact pressure expression; Constructing an expression for the axial bearing capacity of the jacket grouting section according to the jacket grouting section size restriction table; Determine the jacket grouting leg length and the second pile diameter based on the jacket grouting section axial bearing capacity expression and the first pile diameter; The diameter of the steel pipe piles of the jacket is determined according to the second pile diameter.

5. The component optimization method for an offshore wind turbine jacket according to claim 2, characterized in that: The determining of the length of the steel pipe piles of the jacket based on the diameter of the steel pipe piles of the jacket in combination with the geological data specifically includes: Constructing an axial bearing capacity expression and an anti-pull bearing capacity expression of the jacket according to the geological data; According to the axial bearing capacity expression and the anti-pull bearing capacity expression, combined with the steel pipe pile diameter of the jacket, the preset steel pipe pile length is iteratively optimized using the dichotomy method to obtain the steel pipe pile length of the jacket.

6. The component optimization method for an offshore wind turbine jacket according to claim 1, characterized in that: Determining the cross-sectional dimensions of the components of the jacket according to the minimum independent dimension variable group specifically includes: The minimum independent size variable group is used as a driving parameter, and a calculation model is established in combination with a preset component maximum stress ratio, a component minimum stress ratio, and a component fatigue damage target range; Iterate and evaluate the preset initial component cross-sectional dimensions of the jacket according to the calculation model to obtain an evaluation result; When the evaluation result meets the preset threshold requirement, the iteration of the preset initial component cross-sectional size is completed to obtain the component cross-sectional size of the jacket.

7. The component optimization method for an offshore wind turbine jacket according to claim 6, characterized in that: The iterative evaluation of the preset initial component cross-sectional dimensions of the jacket according to the calculation model to obtain the evaluation results specifically includes: The preset initial component cross-sectional dimensions include: initial circular tube component cross-sectional dimensions; The outer diameter and wall thickness of the initial circular tube component cross-sectional dimensions are iterated and evaluated in sequence according to the calculation model to obtain a wave and flow load evaluation result of the initial circular tube component cross-sectional dimensions.

8. A component optimization device for an offshore wind turbine jacket, characterized in that: include: Offshore wind turbine data acquisition module, lower root opening and steel pipe pile size calculation module, minimum independent size variable group calculation module, component cross-section size calculation module and optimal jacket construction module; Wherein, the offshore wind turbine data acquisition module is used to acquire hydrological data, geological data and rated equipment data of the offshore wind turbine; The lower root opening and steel pipe pile size calculation module is used to determine the lower root opening size and steel pipe pile size of the jacket according to the geological data and rated equipment data; The minimum independent size variable group calculation module is used to construct the minimum independent size variable group of the jacket according to the preset offshore wind turbine structural requirements; the minimum independent size variable group calculation module includes: a minimum independent size variable group calculation unit; the minimum independent size variable group calculation unit is used to obtain the variation range of the outer diameter and wall thickness of the round tube in the jacket according to the preset offshore wind turbine structural requirements; obtain the upper limit of the wall thickness difference between adjacent wall thickness segments on the main leg and the diagonal brace in the jacket according to the preset offshore wind turbine structural requirements; and construct the minimum independent size variable group of the jacket according to the variation range and the upper limit of the wall thickness difference; The component cross-sectional size calculation module is used to determine the component cross-sectional size of the jacket according to the minimum independent size variable group; The optimal jacket construction module is used to optimize and verify the components of the offshore wind turbine jacket based on the lower root opening size, steel pipe pile size and component cross-sectional size, combined with the hydrological data, geological data and rated equipment data of the offshore wind turbine, to obtain the optimal jacket of the offshore wind turbine; the optimal jacket construction module includes: an optimal jacket construction unit; the optimal jacket construction unit is used to obtain several verification indicators of the offshore wind turbine jacket based on the hydrological data, geological data and rated equipment data of the offshore wind turbine; construct an initial jacket of the offshore wind turbine based on the lower root opening size, steel pipe pile size and component cross-sectional size; verify the initial jacket based on each of the verification indicators, and optimize the lower root opening size, steel pipe pile size and component cross-sectional size based on the verification results, so that the initial jacket of the offshore wind turbine meets each of the verification indicators, thereby obtaining the optimal jacket of the offshore wind turbine.

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