Method and device for determining design parameters of a composite cylinder for an offshore wind farm

Abstract

The application discloses a method and device for determining design parameters of a composite cylinder type of an offshore wind farm, comprising obtaining and analyzing physical characteristics and mechanical characteristics of soil samples, combining environmental parameters to establish an engineering geological environment evaluation model, inputting the design parameters of the composite cylinder type into the engineering geological environment evaluation model to calculate actual design values of the composite cylinder type, and judging whether the design parameters meet construction conditions. The method for determining the design parameters of the composite cylinder type of the offshore wind farm according to the embodiment of the application comprehensively considers the physical characteristics and mechanical characteristics of the soil samples of the installation site, so that the optimization process of the design parameters of the composite cylinder type is more flexible, comprehensive, accurate and efficient, and the safety and stability during the operation of the wind turbine are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power generation, in particular to a method and device for determining design parameters of a composite cylinder type of an offshore wind farm. BACKGROUND

[0002] Offshore wind power resources are abundant in reserves, have great scale potential, and have relatively optimal electric energy quality, and can be one of the important strategic supports for carrying the energy structure transformation of China. At the same time, the manufacturing technology of offshore wind turbines is becoming mature. However, the existing offshore wind power products and technologies are difficult to achieve parity, which makes the offshore wind power manufacturing face the pressure of cost reduction. Among them, since the cost of wind turbine foundation construction and installation accounts for a large proportion of the total cost, as the water depth of the working water area increases, the manufacturing and installation of offshore wind power foundation structure also face great difficulties, which will increase the cost of foundation structure. The composite cylinder type foundation is a new type of wide and shallow offshore wind power foundation, which is installed in dense sand, and through sinking installation, it lays a good foundation for the wide application of the composite cylinder type foundation in offshore wind power, and can realize the construction concept of high benefit and low cost. In the process of applying the composite cylinder type foundation in the offshore wind farm, a series of technical schemes including design, transportation and installation are involved. In the current offshore wind power project, the design of the composite cylinder type is scored, and then an optimization scheme is proposed.

[0003] In the prior art, the design of the fan is usually simulated by software simulation to obtain an optimized design scheme. Patent CN107895073 discloses a method and system for optimizing the design of a wind turbine blade structure dynamics model. The method includes: obtaining the blade structure dynamics model parameters, including the mass matrix, the stiffness matrix, the mass and the first moment, then determining the constraints of the blade structure dynamics model parameters, and performing modal analysis on the blade structure dynamics model to obtain its modal parameters, then performing correlation analysis on the modal parameters of the structure dynamics model and the modal parameters of the test blade, and correcting the blade structure dynamics model design parameters according to the results. Patent CN112632722 discloses an optimization design method for a wind turbine tower door frame. The method includes: dividing the door frame into three parts to match the cross-sectional stiffness of the door frame with the wall stiffness of the tower, then establishing a functional relationship to calculate the determined door frame thickness value, and gradually reducing the door frame plate thickness to make the cross-sectional inertia moment of the door frame and the cross-sectional inertia moment of the tower cut-off part constant. The present application can uniquely determine the door frame thickness, determine the stiffness curve of the door frame elliptical segment, so that the door frame structure and the wall stiffness are optimally matched, thereby obtaining a design result that matches the door frame structure and the wall stiffness. However, the complex and variable environment around the composite cylinder type foundation has a significant impact on the safety of the wind turbine structure system, and the existing scheme only considers the parameters of the wind turbine equipment, without considering the specific parameters of the actual use environment in the design optimization process, which will result in inaccurate design results, thereby causing safety risks in the overall operation of the offshore wind turbine, and significantly affecting the stability and long-term use of the offshore wind turbine. SUMMARY

[0004] The present application aims to at least partially solve one of the above technical problems.

[0005] To this end, the first object of the present application is to propose a method for determining the design parameters of a composite cylinder type foundation of an offshore wind farm, so that the optimization process of the design parameters of the composite cylinder type foundation is more flexible, comprehensive, accurate and efficient, improves the convenience of the construction and installation process of the composite cylinder type foundation, and further ensures the safety and stability of the wind turbine during operation.

[0006] The second object of the present application is to propose a device for determining the design parameters of a composite cylinder type foundation of an offshore wind farm.

[0007] To achieve the above object, the first aspect of the present application proposes a method for determining the design parameters of a composite cylinder type foundation of an offshore wind farm, comprising:

[0008] S1, obtaining and analyzing the physical and mechanical characteristics of the soil sample;

[0009] S2, based on physical and mechanical characteristics and combined with environmental parameters, establishes an engineering geological environment assessment model;

[0010] S3. Input the design parameters of the composite cylinder into the engineering geological environment assessment model to calculate the actual design value of the composite cylinder.

[0011] S4, determine whether the design parameters meet the construction conditions;

[0012] S5, when the construction conditions are met, determines that the design parameters do not need to be optimized and outputs the design parameters;

[0013] S6. When construction conditions are not met, the design parameters need to be optimized.

[0014] Optional physical characteristics include external state, composition, deposition age, and physical indices; mechanical characteristics include in-situ state parameters, strength parameters, deformation parameters, time parameters, and soil dynamic parameters; and environmental parameters include wind conditions, ocean waves, and hydrodynamic forces.

[0015] Optionally, based on physical and mechanical characteristics, and in conjunction with environmental factors, an engineering geological environment assessment model may be established, including:

[0016] Construct a structural dynamics model for the composite cylindrical structure;

[0017] By inputting physical characteristics, mechanical characteristics, and environmental parameters into the structural dynamics model, an engineering geological environment assessment model is obtained.

[0018] Optionally, determine whether the design parameters meet the construction conditions, including:

[0019] Obtain the preset value corresponding to the actual design value;

[0020] Compare the actual design values ​​with the preset values;

[0021] If the actual design values ​​are all less than the preset values, then the design parameters are determined to meet the construction conditions.

[0022] If at least one actual design value is greater than the preset value, then the design parameters are determined to be inconsistent with the construction conditions.

[0023] Optionally, the actual design values ​​include the ultimate strength value, fatigue strength value, deformation requirement range, and frequency requirement range.

[0024] Optionally, the method further includes:

[0025] S7. Before obtaining and analyzing the physical and mechanical characteristics of the soil sample, select the installation site for the composite cylinder.

[0026] Optionally, the method further includes:

[0027] S8, when it is determined that the design parameters need to be optimized, obtain the number n of items where the actual design value is greater than the preset value, where n≥1;

[0028] S9, determine whether the number of terms n is less than 3;

[0029] S10, If n < 3, then optimize the design parameters and return to step S3;

[0030] S11, if n≥3, then adjust the installation location and return to step S1.

[0031] The method for determining the design parameters of the composite cylindrical foundation for offshore wind farms in this application involves acquiring and analyzing the physical and mechanical characteristics of soil samples, combining them with environmental parameters to establish an engineering geological environment assessment model, and then calculating the actual design value of the composite cylindrical foundation by inputting the design parameters of the composite cylindrical foundation into the engineering geological environment assessment model. This allows for a comprehensive consideration of the physical and mechanical characteristics of the soil samples at the installation site, making the optimization process of the composite cylindrical foundation design parameters more flexible, comprehensive, accurate, and efficient. This improves the convenience of the construction and installation process of the composite cylindrical foundation, thereby ensuring the safety and stability of the wind turbine during operation.

[0032] To achieve the above objectives, a second aspect of this application provides a device for determining the design parameters of a composite cylindrical structure for offshore wind farms, comprising:

[0033] The acquisition module is used to acquire and analyze the physical and mechanical characteristics of soil samples;

[0034] A module is established to create an engineering geological environment assessment model based on physical and mechanical characteristics, combined with environmental parameters.

[0035] The calculation module is used to input the design parameters of the composite cylinder into the engineering geological environment assessment model and calculate the actual design value of the composite cylinder.

[0036] The judgment module is used to determine whether the design parameters meet the construction conditions;

[0037] The first determination module is used to determine that the design parameters do not need to be optimized when the construction conditions are met, and then outputs the design parameters.

[0038] The second determination module is used to determine the need to optimize design parameters when construction conditions are not met.

[0039] Optional physical characteristics include external state, composition, deposition age, and physical indices; mechanical characteristics include in-situ state parameters, strength parameters, deformation parameters, time parameters, and soil dynamic parameters; and environmental parameters include wind conditions, ocean waves, and hydrodynamic forces.

[0040] Optionally, create modules for:

[0041] Construct a structural dynamics model for the composite cylindrical structure;

[0042] By inputting physical characteristics, mechanical characteristics, and environmental parameters into the structural dynamics model, an engineering geological environment assessment model is obtained.

[0043] Optional, a decision module, used for:

[0044] Obtain the preset value corresponding to the actual design value;

[0045] Compare the actual design values ​​with the preset values;

[0046] If the actual design values ​​are all less than the preset values, then the design parameters are determined to meet the construction conditions.

[0047] If at least one actual design value is greater than the preset value, then the design parameters are determined to be inconsistent with the construction conditions.

[0048] Optionally, the actual design values ​​include the ultimate strength value, fatigue strength value, deformation requirement range, and frequency requirement range.

[0049] Optionally, the device may also include:

[0050] The selected module is used to select the installation location of the composite cylinder before acquiring and analyzing the physical and mechanical characteristics of the soil sample.

[0051] Optionally, the device may also include:

[0052] The optimization module is used to obtain the number of items whose actual design value is greater than the preset value, n, when it is determined that the design parameters need to be optimized, where n≥1; determine whether the number of items n is less than 3; if n<3, optimize the design parameters and return to the calculation module; if n≥3, adjust the installation location and return to the acquisition module.

[0053] The device for determining the design parameters of the composite cylindrical foundation for offshore wind farms in this application acquires and analyzes the physical and mechanical characteristics of soil samples, and then combines them with environmental parameters to establish an engineering geological environment assessment model. The actual design value of the composite cylindrical foundation is calculated by inputting the design parameters of the composite cylindrical foundation into the engineering geological environment assessment model, thereby determining whether the design parameters meet the construction conditions. This comprehensively considers the physical and mechanical characteristics of the soil samples at the installation site, making the optimization process of the composite cylindrical foundation design parameters more flexible, comprehensive, accurate, and efficient. This improves the convenience of the construction and installation process of the composite cylindrical foundation, and ultimately ensures the safety and stability of the wind turbine during operation.

[0054] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0055] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0056] Figure 1 A flowchart of a method for determining the design parameters of a composite cylindrical structure for an offshore wind farm, according to one embodiment, is presented;

[0057] Figure 2 A flowchart for determining whether design parameters meet construction conditions is presented as an example;

[0058] Figure 3 A flowchart of a method for determining the design parameters of a composite cylindrical structure for offshore wind farms, according to another embodiment, is presented;

[0059] Figure 4 A flowchart of a method for determining the design parameters of a composite cylindrical structure for offshore wind farms, according to yet another embodiment, is presented;

[0060] Figure 5 A schematic diagram of a device for determining the design parameters of a composite cylindrical structure for an offshore wind farm, according to one embodiment, is presented.

[0061] Figure 6 A schematic diagram of the structure of a device for determining the design parameters of a composite cylindrical structure for offshore wind farms, according to another embodiment, is presented;

[0062] Figure 7 A schematic diagram of the structure of a device for determining the design parameters of a composite cylindrical structure for offshore wind farms, according to yet another embodiment, is presented. Detailed Implementation

[0063] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0064] The present invention will be further described in detail below with reference to specific embodiments, which should not be construed as limiting the scope of protection claimed by the present invention.

[0065] The following describes, with reference to the accompanying drawings, a method and apparatus for determining the design parameters of a composite cylindrical structure for offshore wind farms according to embodiments of this application.

[0066] Figure 1 This is a flowchart illustrating a method for determining the design parameters of a composite cylindrical structure for offshore wind farms according to an embodiment of this application, as shown below. Figure 1 As shown, the method includes the following steps:

[0067] S1, acquire and analyze the physical and mechanical characteristics of the soil sample.

[0068] Physical characteristics may include external state, composition, depositional age, physical indices, etc., while mechanical characteristics may include in-situ state parameters, strength parameters, deformation parameters, time parameters, soil dynamic parameters, etc.

[0069] In one specific embodiment, at the installation site of the offshore wind turbine, quantitative soil samples are obtained at specified points and depths using testing instruments. The physical and mechanical characteristics of each soil sample are then analyzed. Each physical and mechanical characteristic of the soil sample is treated as a data point. Then, according to the 2σ principle of normal distribution, low-probability events are identified to obtain an initial database after removing outliers. Finally, the weighted average of the data points contained in each physical and mechanical characteristic is calculated to obtain the physical and mechanical characteristic database of the soil sample.

[0070] Compared to pile foundations, the erosion damage to the surrounding soil of the composite cylindrical foundation of offshore wind turbines can significantly impact the overall structural safety of the turbine. Therefore, the aforementioned process allows for the precise acquisition and analysis of the physical and mechanical characteristics of soil samples from the installation site, providing data support for subsequent turbine design optimization and further improving the accuracy of the design. Simultaneously, as the operating water depth increases, the construction and installation of the turbine foundation become more challenging. Therefore, analyzing soil samples from the installation site provides data support for site selection, enhancing the convenience of the installation process.

[0071] S2, based on physical and mechanical characteristics and combined with environmental parameters, establishes an engineering geological environment assessment model.

[0072] Specifically, a structural dynamics model of the composite cylindrical structure is constructed, and physical characteristics, mechanical characteristics, and environmental parameters are input into the structural dynamics model to obtain an engineering geological environment assessment model.

[0073] Environmental parameters may include wind conditions, ocean waves, and water flow forces.

[0074] In one specific embodiment, a structural dynamics model of the composite cylindrical foundation is built using simulation software. The initial values ​​of all design parameters in this model are the preset parameters of the wind turbine. Then, the physical and mechanical characteristics database of the soil samples in S1 is imported into the structural dynamics model, and typical working conditions in the structural dynamics model are determined through various environmental parameters, thereby obtaining an engineering geological environment assessment model. The preset parameters of the wind turbine are empirical values ​​of the design parameters of the wind turbine during the actual construction of the wind farm. Typical working conditions may include normal working conditions, start-up and shutdown working conditions, fault working conditions, and extreme working conditions.

[0075] Since the loads on the foundations of offshore wind turbines mainly come from wind, waves, and currents, the above process, taking into account the various physical and mechanical characteristics of the soil samples at the installation site, further covers the typical working conditions in the composite cylindrical foundation environment. This allows for a more comprehensive and accurate design optimization process for the subsequent composite cylindrical foundations of wind turbines, ensuring the safe operation of the wind turbines under various working conditions and guaranteeing the stability of the wind farm's power generation process.

[0076] S3. Input the design parameters of the composite cylinder into the engineering geological environment assessment model to calculate the actual design value of the composite cylinder.

[0077] The actual design values ​​for composite cylindrical foundations may include ultimate strength, fatigue strength, deformation requirement range, and frequency requirement range. Specifically, the total deformation angle of the composite cylindrical foundation includes the foundation angle at the installation location and the permanently accumulated deformation angle. The deformation requirement range refers to the safe interval within which the deformation angle at the installation location of the composite cylindrical foundation falls. For example, if the total deformation angle of the composite cylindrical foundation cannot exceed 0.8°, and the verticality of the foundation after installation is controlled at 0.4° (i.e., the foundation angle at the installation location is 0.4°), then the permanent cumulative deformation angle limit α of the cylindrical foundation is 0.4°, i.e., α ≤ 0.4°. Furthermore, the frequency requirement range refers to the range of natural frequencies of the composite cylindrical foundation to avoid resonance with dynamic forces. In addition, design parameters may include single-unit diameter, cylinder height, and weight.

[0078] Specifically, the design parameters of the composite cylindrical foundation are input into the engineering geological environment assessment model, environmental parameters are set to determine typical working conditions, and the actual design value of the composite cylindrical foundation is calculated based on the physical and mechanical characteristics data of the soil sample.

[0079] In one specific embodiment, the ultimate working condition is determined by setting environmental parameters. Based on the sedimentary age and strength parameters of the soil sample, design parameters are input, and the ultimate strength value of the composite cylindrical foundation is calculated. By setting the environmental parameters to normal working condition and ultimate working condition respectively, the fatigue strength value of the composite cylindrical foundation is calculated based on the composition, sedimentary age, strength parameters, and geodynamic parameters of the soil sample, and design parameters are input. By setting the environmental parameters to ultimate working condition, the deformation requirement of the composite cylindrical foundation is calculated based on the in-situ state parameters, deformation parameters, and time parameters of the soil sample, and design parameters are input. By setting the environmental parameters to determine the normal working condition, the frequency requirement of the composite cylindrical foundation is calculated based on the composition of the soil sample, and design parameters are input.

[0080] Compared to existing technologies that determine actual design values ​​based solely on wind turbine design parameters, which cannot adapt to the design optimization of composite cylindrical foundations in complex and special installation environments in offshore wind farms, this method fully considers the physical and mechanical characteristics of the seabed and incorporates them as factors in the design optimization of composite cylindrical foundations. By flexibly configuring various parameter values, it improves the accuracy of the design optimization process and ensures the safety and stability of wind turbine operation.

[0081] S4, determine whether the design parameters meet the construction conditions.

[0082] like Figure 2 As shown, S4 specifically includes the following steps:

[0083] S41, obtain the preset value corresponding to the actual design value.

[0084] The preset values ​​are derived by staff based on the specifications and past experience data of each actual design value.

[0085] S42 compares the actual design value with the preset value.

[0086] S43. If the actual design values ​​are all less than the preset values, then the design parameters are determined to meet the construction conditions.

[0087] S44. If at least one actual design value is greater than the preset value, then the design parameters are determined to be inconsistent with the construction conditions.

[0088] Therefore, by comparing the actual design values ​​obtained based on the physical and mechanical characteristics of the soil samples with the preset values, the design parameters can be accurately determined, ensuring that the composite cylindrical foundation put into construction and installation can guarantee the safety and stability of the wind turbine operation.

[0089] S5 determines that the design parameters do not need to be optimized when the construction conditions are met, and outputs the design parameters.

[0090] S6. When construction conditions are not met, the design parameters need to be optimized.

[0091] This avoids the risks caused by composite cylindrical foundations that do not meet construction conditions, and allows for timely optimization of their design parameters.

[0092] In another embodiment, such as Figure 3 As shown, it also includes the following steps:

[0093] S7. Before obtaining and analyzing the physical and mechanical characteristics of the soil sample, select the installation site for the composite cylinder.

[0094] Selecting an installation site provides a foundation for subsequent soil sample extraction. If the sampling area is too wide, it will lead to inaccurate soil sample analysis. Furthermore, when selecting an installation site, past data and experience can be used to determine the designated sampling points and depths, which will serve as the actual installation locations for the composite cylindrical foundation. This ensures that the composite cylindrical foundation, constructed according to the design parameters that meet the construction conditions, can be installed quickly and smoothly.

[0095] In yet another embodiment, such as Figure 4 As shown, it also includes the following steps:

[0096] S8, when it is determined that the design parameters need to be optimized, obtain the number n of items where the actual design value is greater than the preset value, where n≥1;

[0097] S9, determine whether the number of terms n is less than 3;

[0098] S10, If n < 3, then optimize the design parameters and return to step S3;

[0099] S11, if n≥3, then adjust the installation location and return to step S1.

[0100] When the number of items where the actual design value is greater than the preset value is n < 3, the feasibility of optimizing the design parameters is relatively high, and the design parameters can be optimized quickly and conveniently. However, when the number of items n ≥ 3, the optimization process of the design parameters is too complicated and lengthy. By adjusting the installation location, the efficiency of the design optimization process can be further improved.

[0101] The method for determining the design parameters of the composite cylindrical foundation for offshore wind farms in this application involves acquiring and analyzing the physical and mechanical characteristics of soil samples, combining them with environmental parameters to establish an engineering geological environment assessment model, and then calculating the actual design value of the composite cylindrical foundation by inputting the design parameters of the composite cylindrical foundation into the engineering geological environment assessment model. This allows for a comprehensive consideration of the physical and mechanical characteristics of the soil samples at the installation site, making the optimization process of the composite cylindrical foundation design parameters more flexible, comprehensive, accurate, and efficient. This improves the convenience of the construction and installation process of the composite cylindrical foundation, thereby ensuring the safety and stability of the wind turbine during operation.

[0102] To achieve the above embodiments, this application also proposes a device for determining the design parameters of composite cylindrical structures for offshore wind farms.

[0103] Figure 5 This is a schematic diagram of the structure of a device for determining the design parameters of a composite cylindrical structure for an offshore wind farm, according to an embodiment of this application.

[0104] like Figure 5As shown, the device for determining the design parameters of the composite cylindrical shape of an offshore wind farm includes an acquisition module 51, an establishment module 52, a calculation module 53, a judgment module 54, a first determination module 55, and a second determination module 56.

[0105] The acquisition module 51 is used to acquire and analyze the physical and mechanical characteristics of the soil sample. The physical characteristics may include external state, composition, deposition age, physical indices, etc., while the mechanical characteristics may include in-situ state parameters, strength parameters, deformation parameters, time parameters, soil dynamic parameters, etc.

[0106] Module 52 is established to create an engineering geological environment assessment model based on physical and mechanical characteristics, combined with environmental parameters. These environmental parameters may include wind conditions, ocean waves, and hydrodynamic forces.

[0107] Module 52 is specifically used to: build a structural dynamics model of the composite cylinder, and then input the physical characteristics, mechanical characteristics and environmental parameters into the structural dynamics model to obtain an engineering geological environment assessment model.

[0108] The calculation module 53 is used to input the design parameters of the composite cylinder into the engineering geological environment assessment model and calculate the actual design values ​​of the composite cylinder. These actual design values ​​may include ultimate strength values, fatigue strength values, deformation requirement ranges, and frequency requirement ranges.

[0109] The judgment module 54 is specifically used to: obtain the preset value corresponding to the actual design value, and compare the actual design value with the preset value. If all actual design values ​​are less than the preset value, it is determined that the design parameters meet the construction conditions; if at least one actual design value is greater than the preset value, it is determined that the design parameters do not meet the construction conditions.

[0110] The first determining module 55 is used to determine that the design parameters do not need to be optimized when the construction conditions are met, and to output the design parameters.

[0111] The second determining module 56 is used to determine the need for optimization of design parameters when construction conditions are not met.

[0112] In another embodiment, such as Figure 6 As shown, the device also includes a selection module 57 for selecting the installation location of the composite cylinder before acquiring and analyzing the physical and mechanical characteristics of the soil sample.

[0113] In yet another embodiment, such as Figure 7 As shown, the device also includes an optimization module 58, used to obtain the number n of items whose actual design values ​​are greater than preset values ​​when it is determined that the design parameters need to be optimized, where n≥1. Then, it is determined whether the number of items n is less than 3. If n<3, the design parameters are optimized and the process returns to the calculation module; if n≥3, the installation location is adjusted and the process returns to the acquisition module.

[0114] It should be understood that the device for determining the design parameters of the composite cylindrical shape of offshore wind farm is consistent with the description of the corresponding method for determining the design parameters of the composite cylindrical shape of offshore wind farm, so it will not be repeated in this embodiment.

[0115] The device for determining the design parameters of the composite cylindrical foundation for offshore wind farms in this application acquires and analyzes the physical and mechanical characteristics of soil samples, and then combines them with environmental parameters to establish an engineering geological environment assessment model. The actual design value of the composite cylindrical foundation is calculated by inputting the design parameters of the composite cylindrical foundation into the engineering geological environment assessment model, thereby determining whether the design parameters meet the construction conditions. This comprehensively considers the physical and mechanical characteristics of the soil samples at the installation site, making the optimization process of the composite cylindrical foundation design parameters more flexible, comprehensive, accurate, and efficient. This improves the convenience of the construction and installation process of the composite cylindrical foundation, and ultimately ensures the safety and stability of the wind turbine during operation.

[0116] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0117] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A method for determining the design parameters of a composite cylindrical structure for offshore wind farms, characterized in that, include: S1, acquire and analyze the physical and mechanical characteristics of the soil sample. The physical characteristics include external state, composition, deposition age, and physical indices. The mechanical characteristics include in-situ state parameters, strength parameters, deformation parameters, time parameters, and soil dynamic parameters. S2. Based on the physical and mechanical characteristics and combined with environmental parameters, an engineering geological environment assessment model is established, including wind conditions, ocean waves, and water flow force. S3, input the design parameters of the composite cylinder into the engineering geological environment assessment model, and calculate the actual design value of the composite cylinder; S4, determine whether the design parameters meet the construction conditions; S5, if the construction conditions are met, determine that the design parameters do not need to be optimized, and output the design parameters; S6, if the construction conditions are not met, determine that the design parameters need to be optimized; Among them, based on the physical and mechanical characteristics, and in combination with environmental factors, an engineering geological environment assessment model is established, including: A structural dynamics model of the composite cylindrical shape was built using simulation software, and the initial values ​​of the various design parameters of the structural dynamics model were preset parameters of the wind turbine. The physical characteristics, mechanical characteristics, and environmental parameters are input into the structural dynamics model. Typical working conditions in the structural dynamics model are determined by the environmental parameters to obtain the engineering geological environment assessment model. The typical working conditions include at least one of normal working conditions, start-stop working conditions, fault working conditions, and extreme working conditions.

2. The method according to claim 1, characterized in that, Determining whether the design parameters meet the construction conditions includes: Obtain the preset value corresponding to the actual design value; Compare the actual design value with the preset value; If all actual design values ​​are less than the preset values, then the design parameters are determined to meet the construction conditions. If at least one of the actual design values ​​is greater than the preset value, then the design parameters are determined to be inconsistent with the construction conditions.

3. The method according to claim 2, characterized in that, The actual design values ​​include ultimate strength value, fatigue strength value, deformation requirement range, and frequency requirement range.

4. The method according to claim 3, characterized in that, Also includes: S7. Before acquiring and analyzing the physical and mechanical characteristics of the soil sample, select the installation location of the composite cylinder.

5. The method according to claim 4, characterized in that, Also includes: S8, when it is determined that the design parameters need to be optimized, obtain the number n of items where the actual design value is greater than the preset value, where n≥1; S9, determine whether the number of terms n is less than 3; S10, If n < 3, then optimize the design parameters and return to step S3; S11, if n≥3, then adjust the installation location and return to step S1.

6. A device for determining the design parameters of a composite cylindrical structure for offshore wind farms, characterized in that, include: The acquisition module is used to acquire and analyze the physical and mechanical characteristics of soil samples. The physical characteristics include external state, composition, deposition age, and physical indices. The mechanical characteristics include in-situ state parameters, strength parameters, deformation parameters, time parameters, and soil dynamic parameters. A module is established to build an engineering geological environment assessment model based on the physical and mechanical characteristics and in combination with environmental parameters, including wind conditions, ocean waves, and water flow forces. The calculation module is used to input the design parameters of the composite cylinder into the engineering geological environment assessment model and calculate the actual design value of the composite cylinder. The judgment module is used to determine whether the design parameters meet the construction conditions. The first determining module is used to determine that the design parameters do not need to be optimized when the construction conditions are met, and to output the design parameters. The second determining module is used to determine that the design parameters need to be optimized when the construction conditions are not met. The establishment module is used for: A structural dynamics model of the composite cylindrical shape was built using simulation software, and the initial values ​​of the various design parameters of the structural dynamics model were preset parameters of the wind turbine. The physical characteristics, mechanical characteristics, and environmental parameters are input into the structural dynamics model. Typical working conditions in the structural dynamics model are determined by the environmental parameters to obtain the engineering geological environment assessment model. The typical working conditions include at least one of normal working conditions, start-stop working conditions, fault working conditions, and extreme working conditions.

7. The apparatus according to claim 6, characterized in that, The judgment module is used for: Obtain the preset value corresponding to the actual design value; Compare the actual design value with the preset value; If all actual design values ​​are less than the preset values, then the design parameters are determined to meet the construction conditions. If at least one of the actual design values ​​is greater than the preset value, then the design parameters are determined to be inconsistent with the construction conditions.

8. The apparatus according to claim 7, characterized in that, The actual design values ​​include ultimate strength value, fatigue strength value, deformation requirement range, and frequency requirement range.

9. The apparatus according to claim 8, characterized in that, Also includes: The selected module is used to select the installation location of the composite cylinder before acquiring and analyzing the physical and mechanical characteristics of the soil sample.

10. The apparatus according to claim 9, characterized in that, Also includes: The optimization module is used to, when it is determined that the design parameters need to be optimized, obtain the number n of items where the actual design value is greater than the preset value, where n≥1; determine whether the number n is less than 3; if n<3, optimize the design parameters and return to the calculation module; if n≥3, adjust the installation location and return to the acquisition module.

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