Method and device for determining pile foundation parameters of offshore wind power, program product and equipment

Abstract

This disclosure relates to the field of offshore wind power technology, providing a method, apparatus, program product, and equipment for determining the foundation parameters of offshore wind power. The method includes: applying a cyclic load of a first preset duration to a three-dimensional finite element model of the constructed foundation to simulate the pile displacement under long-term cyclic loading, wherein the load parameters of the cyclic load are determined based on the environmental load of the sea area to be piled; if the difference between the pile displacement and the preset displacement is greater than a preset value, adjusting the three-dimensional finite element model of the foundation, and continuing to simulate the pile displacement under long-term cyclic loading based on the adjusted three-dimensional finite element model until a target three-dimensional finite element model is obtained; and determining the foundation parameter values ​​of the sea area to be piled based on the target three-dimensional finite element model. This solution can improve the accuracy of determining the foundation parameters of offshore wind power.

Description

Technical Field

[0001] This disclosure relates to the field of offshore wind power technology, and more specifically, to a method for determining the pile foundation parameters of offshore wind power, a device for determining the pile foundation parameters of offshore wind power, a computer program product, and an electronic device. Background Technology

[0002] In offshore wind power, the pile foundations are the support piles fixed to the seabed and supporting the entire wind turbine. They are the core load-bearing structure of the entire offshore wind farm. The marine environment is complex and variable, and extreme conditions, such as maximum wave loads, are usually considered when designing pile foundations to ensure the load-bearing capacity of the pile foundations under extreme conditions.

[0003] However, in the construction of offshore wind power plants, the foundation structures, such as pile foundations, are subjected to continuous cyclical loads from natural forces such as wind and waves. Therefore, the reliability and safety sustainability of pile foundations designed only for extreme conditions may be relatively low.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a method and apparatus for determining the pile foundation parameters of offshore wind power, a computer program product and electronic equipment, thereby improving the safety of the pile foundation of offshore wind power in long-term use to at least a certain extent.

[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.

[0007] According to a first aspect of this disclosure, a method for determining the pile foundation parameters for offshore wind power is provided, comprising: applying a cyclic load of a first preset duration to a three-dimensional finite element model of the constructed pile foundation to simulate the pile displacement under long-term cyclic load, wherein the load parameters of the cyclic load are determined based on the environmental load of the sea area to be piled; adjusting the three-dimensional finite element model of the pile foundation when the difference between the pile displacement and the preset displacement is greater than a preset value, and continuing to simulate the pile displacement under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until a target three-dimensional finite element model is obtained; and determining the target pile foundation parameter values ​​for the sea area to be piled based on the target three-dimensional finite element model.

[0008] According to a second aspect of this disclosure, a pile foundation determination device for offshore wind power is provided, comprising: a simulation module configured to apply a cyclic load of a first preset duration to a three-dimensional finite element model of the constructed pile foundation to simulate the pile displacement under long-term cyclic load, wherein the load parameters of the cyclic load are determined according to the environmental load of the sea area to be piled; an adjustment module configured to adjust the three-dimensional finite element model of the pile foundation when the difference between the pile displacement and the preset displacement is greater than a preset value, and to continue simulating the pile displacement under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until a target three-dimensional finite element model is obtained; and a pile foundation parameter determination module configured to determine the target pile foundation parameter values ​​of the sea area to be piled based on the target three-dimensional finite element model.

[0009] According to a third aspect of this disclosure, a computer program product containing instructions is provided that, when run on a computer, causes the computer to perform the steps of the method for determining the pile foundation parameters of offshore wind power as described in the first aspect.

[0010] According to a fourth aspect of this disclosure, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the method for determining the pile foundation parameters of offshore wind power as described in the first aspect of the above embodiments.

[0011] According to a fifth aspect of the present disclosure, an electronic device is provided, comprising: a processor; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the one or more processors to implement the method for determining the pile foundation parameters of offshore wind power as described in the first aspect of the above embodiments.

[0012] As can be seen from the above technical solutions, the method for determining the pile foundation parameters of offshore wind power, the device for determining the pile foundation parameters of offshore wind power, and the computer program product and electronic device for implementing the method for determining the pile foundation parameters of offshore wind power in the exemplary embodiments of this disclosure have at least the following advantages and positive effects:

[0013] In some embodiments of the present disclosure, the technical solutions provided include, on the one hand, applying a cyclic load of a first preset duration to a three-dimensional finite element model of the pile foundation to simulate the pile displacement under long-term cyclic load; and adjusting the pile foundation parameters corresponding to the pile foundation based on the difference between the simulated displacement and the preset displacement to obtain pile foundation parameters that can meet the safety requirements of the pile foundation under long-term cyclic load, thereby improving the safety and reliability of the pile foundation during long-term use. On the other hand, quantifying the safety of the pile foundation during long-term use through pile displacement allows for directional optimization and adjustment of the pile foundation parameters based on the simulation results of the pile displacement, thus improving the efficiency of determining the pile foundation parameters.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] Figure 1 This diagram illustrates a flowchart of a method for determining the foundation parameters of offshore wind power in an exemplary embodiment of this disclosure.

[0017] Figure 2 A flowchart illustrating a method for determining an initial three-dimensional finite element model according to an exemplary embodiment of this disclosure is shown.

[0018] Figure 3 A flowchart illustrating a method for applying cyclic loads according to an exemplary embodiment of this disclosure is shown.

[0019] Figure 4 A flowchart illustrating a method for obtaining a target three-dimensional finite element model according to an exemplary embodiment of the present disclosure is shown.

[0020] Figure 5 This diagram illustrates the composition of a pile foundation parameter determination device for offshore wind power according to an exemplary embodiment of this disclosure.

[0021] Figure 6 A schematic diagram of the structure of an electronic device according to an exemplary embodiment of the present disclosure is shown. Detailed Implementation

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this disclosure more comprehensive and complete, and to fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a full understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, apparatus, steps, etc., can be employed. In other instances, well-known technical solutions are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0023] The terms “a,” “an,” “the,” and “the” are used in this specification to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first” and “second” are used only as markings and are not a limitation on the number of objects.

[0024] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0025] The accuracy of the pile foundation parameters for offshore wind power determined by relevant technologies is insufficient, and the determination process relies on human experience and manual calculation, resulting in low efficiency in determining the pile foundation parameters for offshore wind power.

[0026] To address the aforementioned issues, this disclosure provides a method for determining the foundation parameters of offshore wind power, referencing... Figure 1 The method includes:

[0027] Step S110: Apply a cyclic load of a first preset duration to the three-dimensional finite element model of the constructed pile foundation to simulate the pile displacement under long-term cyclic load. The load parameters of the cyclic load are determined according to the environmental load of the sea area to be piled.

[0028] Step S120: If the difference between the pile displacement and the preset displacement is greater than the preset value, adjust the three-dimensional finite element model of the pile foundation, and continue to simulate the pile displacement under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until the target three-dimensional finite element model is obtained.

[0029] Step S130: Determine the target pile foundation parameter values ​​for the sea area to be piled based on the target three-dimensional finite element model.

[0030] exist Figure 1In the technical solution provided by the illustrated embodiment, on the one hand, by applying a cyclic load of a first preset duration to the three-dimensional finite element model of the pile foundation, the pile displacement under long-term cyclic load is simulated. Based on the difference between the simulated displacement and the preset displacement, the pile foundation parameters corresponding to the pile foundation are adjusted to obtain pile foundation parameters that can meet the safety requirements of the pile foundation under long-term cyclic load, thereby improving the safety and reliability of the pile foundation during long-term use. On the other hand, the safety of the pile foundation during long-term use is quantified by the pile displacement, thereby realizing the directional optimization and adjustment of the pile foundation parameters based on the simulation results of the pile displacement, which improves the efficiency of determining the pile foundation parameters.

[0031] Next, a detailed explanation will be given of the specific implementation method of "step S110, applying a cyclic load of a first preset duration to the three-dimensional finite element model of the constructed pile foundation to simulate the pile displacement under long-term cyclic load".

[0032] In one exemplary embodiment, the three-dimensional finite element model of the pile foundation is determined by the modeling parameters of the pile foundation. The modeling parameters of the pile foundation include the attribute parameters of the pile foundation itself and the geological parameters of the sea area where the pile foundation is located. The attribute parameters of the pile foundation itself include the geometric parameters of the pile foundation (such as pile length, pile diameter, wall thickness, etc.) and the material parameters of the pile foundation (such as elastic modulus, Poisson's ratio, density, etc.). The geological parameters of the sea area where the pile foundation is located include soil layer distribution parameters (such as the thickness, burial depth, and distribution range of each soil layer), soil mechanical parameters (such as elastic modulus, cohesion, etc.), and pile-soil interaction parameters (such as pile friction coefficient, contact surface stiffness, etc.).

[0033] For example, a three-dimensional finite element model of the pile foundation can be built in finite element software based on the above-mentioned pile foundation modeling parameters. For example, the geometry of the pile foundation, soil layer, etc. can be drawn in the finite element software, and then meshed to discretize the geometric model into calculation units. Material parameters can be assigned to the pile foundation and soil respectively, and contact and boundary conditions can be set, thereby realizing the construction of the three-dimensional finite element model.

[0034] In one exemplary embodiment, as previously described, the modeling parameters of the pile foundation include material parameters, and the material parameters in the modeling parameters of the pile foundation include structural damping parameters.

[0035] For example, when performing three-dimensional finite element model simulations, this disclosure also considers the damping effect of the structure itself and adds structural damping parameters to the material parameters, thereby more accurately simulating the performance of wind power generation foundations under actual operating conditions and improving the accuracy of pile foundation parameter design.

[0036] For example, Figure 2 This diagram illustrates a flowchart of a method for determining an initial three-dimensional finite element model according to an exemplary embodiment of this disclosure. (See reference...) Figure 2The method may include steps S210 to S230, wherein:

[0037] In step S210, at least one reference sea area is determined based on the similarity between the sea area parameters of the sea area to be piled and the sea area parameters of the sample sea areas in the sample library.

[0038] In one exemplary implementation, the sample sea area includes a piled sea area, and the sea area parameters include geological parameters and environmental parameters.

[0039] For example, geological and environmental parameters of the sea areas where various operational offshore wind power projects are located, as well as the intrinsic properties of the piles used, can be collected to generate a sample library. For instance, geological parameters such as soil layer distribution and soil mechanics parameters, environmental parameters such as wind speed and wind force, and the intrinsic properties of the piles used can be collected from the sea areas where various operational offshore wind power projects are located to generate a sample library. Then, the sea area parameters of the sea area to be piled up are compared with the sea area parameters of the sample sea areas in the sample library. The sample sea areas with a similarity greater than a similarity threshold or ranking in the top N similarity categories are identified as reference sea areas for the sea area to be piled up.

[0040] In step S220, the actual pile displacement of each reference sea area within a second preset time period after being put into use is obtained. Based on the pile performance requirements of the reference sea area and the actual pile displacement of each reference sea area, the target sea area is determined from the reference sea area.

[0041] For example, the sample library does not yet store the actual pile displacement of each pile foundation in the piling area within a second preset period after being put into use. The second preset period is determined according to needs or actual conditions, such as 1 year, 2 years, etc., and this exemplary embodiment does not impose any special limitation on it. Taking a second preset period of 1 year as an example, the actual pile displacement of the pile foundation in the reference sea area of ​​the aforementioned piling area after 1 year of use can be obtained from the sample library.

[0042] For example, the pile foundation performance requirements of the target sea area can be matched with the pile foundation performance of each reference sea area. The successfully matched reference sea areas are used as candidate sea areas. For example, if the reference sea areas include sea area A, sea area B and sea area C, and the pile foundation requirements include a seepage resistance grade greater than or equal to P8, and sea areas A and C in the reference sea areas can meet the requirement of a seepage resistance grade greater than or equal to P8, then reference sea areas A and reference sea areas C are candidate sea areas. Then, the sea area with the smallest actual pile displacement among the candidate sea areas is determined as the target sea area.

[0043] In step S230, the initial three-dimensional finite element model is determined based on the pile foundation parameters of the target sea area.

[0044] For example, the attribute parameters of the pile foundation itself in the pile foundation parameters of the target sea area can be determined as the attribute parameters of the pile foundation itself in the initial three-dimensional finite element model, and then combined with the geological parameters of the pile to be driven to obtain the initial three-dimensional finite element model.

[0045] By using steps S210 to S230, the blindness of the initial modeling can be avoided, the accuracy of the initial model can be improved, the number of subsequent iterations can be shortened as much as possible, and the efficiency and accuracy of determining the pile foundation parameters can be improved.

[0046] In one exemplary embodiment, the load parameters of the cyclic load are determined based on the environmental load of the sea area where the piling is to be carried out. The environmental load may include one or more of wave load, tidal current load, and wind load.

[0047] For example, in the construction of offshore wind power facilities, their foundation structures are subjected to continuous cyclic loads from natural forces such as wind and waves. Wave loads, tidal current loads, and wind loads are all continuous, so they can all be considered long-term cyclic loads. Among them, wave loads are the most critical load on offshore wind turbine foundations, as their amplitude is large and has a significant impact on the horizontal bearing characteristics of the foundation. The impact of wind loads on the horizontal bearing characteristics of the foundation is secondary, as it is indirect. Wind loads act directly on the wind turbine blades and tower, and are then transmitted to the foundation through the bottom of the tower. Tidal current loads have smaller amplitudes, so their impact on the bearing characteristics of the foundation is relatively small.

[0048] For example, wave load, Figure 3 A schematic flowchart illustrating a method for applying cyclic loads according to an exemplary embodiment of this disclosure is shown. (Reference) Figure 3 The method may include steps S310 to S340. Wherein:

[0049] In step S310, the wave period and wave amplitude of the sea area to be piled are obtained, and the first occurrence frequency of each wave period and the second occurrence frequency of each wave amplitude are counted.

[0050] For example, wave cycles and amplitudes of the sea area to be piled can be collected and obtained through weather stations. For instance, the wave cycles and amplitudes of the sea area to be piled, as monitored by the weather station, over the past year can be obtained, and then the frequency of each wave cycle and the frequency of each wave amplitude can be statistically analyzed.

[0051] In step S320, the first wave period with the highest frequency of occurrence is determined as the target period, and the second wave amplitude with the highest frequency of occurrence is determined as the target amplitude.

[0052] For example, the wave cycle that appears most frequently in the past year can be used as the target cycle, and the wave amplitude that appears most frequently can be determined as the target amplitude.

[0053] In step S330, a cyclic load in the form of a sine wave is generated based on the target period, with the target amplitude being the maximum amplitude.

[0054] Simulating horizontal cyclic loads is a challenge in the design and analysis of wind power foundations because these loads vary over time, and parameters such as load type, frequency, amplitude, and number of cycles may differ. This disclosure employs a specific load application method. Specifically, the cyclic horizontal loads used in this disclosure follow a sinusoidal waveform, which can be expressed as the following formula (1):

[0055] (1)

[0056] In formula (1), The amplitude representing the load can be determined based on the target amplitude mentioned above. The initial phase angle is set to 0 in this disclosure, while The frequency of the vibration can be determined based on the target period, such as the reciprocal of the target period. For example, if the frequency is set to 0.5 Hz and the total duration of the load is 100 seconds, this means the load will undergo 50 complete cycles.

[0057] In step S340, a cyclic load of the sinusoidal waveform pattern with a first preset duration is applied to the pile top coupling reference point of the three-dimensional finite element model of the pile foundation.

[0058] In one exemplary embodiment, the first preset duration can be customized as needed, such as 1 minute, 5 minutes, etc., and this exemplary embodiment does not impose any special limitations on it.

[0059] For example, in the simulation, long-term cyclic loads are applied to a coupled reference point at the top of the pile, which causes the pile to undergo a cyclic deformation process of loading, unloading and reloading in the y-axis direction.

[0060] Through steps S310 to S340 above, the long-term cyclic load can be determined based on the actual environmental load of the sea area to be piled, and the pile displacement of the pile foundation in the sea area to be piled under the long-term cyclic load can be simulated more accurately.

[0061] When designing pile foundations for offshore wind power, in addition to ensuring their bearing capacity under extreme conditions, attention must also be paid to the potential reduction in stiffness and cumulative deformation under long-term cyclic loading. This disclosure quantifies the horizontal bearing capacity of wind power pile foundations by measuring lateral displacements, such as horizontal displacements, thereby simulating and determining the pile foundation parameters.

[0062] Next, a detailed explanation will be given of the specific implementation method of "step S120, when the difference between the pile displacement and the preset displacement is greater than the preset value, adjusting the three-dimensional finite element model of the pile foundation, and continuing to simulate the pile displacement under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until the target three-dimensional finite element model is obtained".

[0063] For example, the preset displacement can be determined according to actual conditions and needs. The preset displacement needs to conform to natural laws and ensure the safety of the pile foundation. For instance, the preset displacement can be the maximum displacement of the pile foundation within a safe range. For example, if the preset displacement is exceeded, the safety and stability of the pile foundation will decrease sharply. The preset value can also be customized according to needs. The preset value is used to measure the difference between the simulated pile displacement and the preset displacement. The smaller the preset value, the smaller the difference between the two, and the more accurate the obtained pile foundation parameters.

[0064] For example, Figure 4 This diagram illustrates a flowchart of a method for obtaining a target three-dimensional finite element model according to an exemplary embodiment of this disclosure. (See reference...) Figure 4 The method may include steps S410 to S409. Wherein:

[0065] In step S401, the modeling parameters are traversed based on the adjustment priority of the modeling parameters.

[0066] In one exemplary implementation, as previously described, the types of modeling parameters include pile foundation property parameters and marine geological parameters of the sea area to be piled. The adjustment priority of the modeling parameters is determined based on the degree of influence of the modeling parameters on the pile displacement and the type of the modeling parameters.

[0067] For example, the adjustment priority of modeling parameters can include prioritizing modeling parameters related to the marine geological parameters of the area to be piled over those related to the pile's own attribute parameters. For modeling parameters of the same type, their adjustment priority is further determined based on their influence on pile displacement, thus obtaining the final adjustment priority for all modeling parameters. In other words, when adjusting the three-dimensional finite element model of the pile foundation, priority is given to the geological parameters of the area to be piled. For these parameters, those with a greater impact on pile displacement are adjusted first. Only when all geological parameters cannot be adjusted are the pile's own attribute parameters adjusted. Similarly, the pile's own attribute parameters are adjusted sequentially based on their influence on pile displacement.

[0068] In this way, the influence of inappropriate geological parameter values ​​measured during the modeling process on the accuracy of the modeling can be eliminated. For example, if the value of a certain geological parameter is between a1 and a2, but the minimum value a1 is taken in the initial modeling, obviously a1 may lead to a smaller estimated value of the geological parameter. If the geological parameter is not adjusted, but the property parameters of the pile foundation itself are adjusted, there will be a problem of using over-design to cover up the unreasonable geological parameter values, thus leading to inaccurate determination of the pile foundation's own parameters.

[0069] In step S402, the adjustment range of the currently traversed modeling parameters is determined based on the influence curve of the currently traversed modeling parameters on the pile foundation displacement.

[0070] For example, the influence curves of various modeling parameters on pile foundation displacement under long-term cyclic loading can be determined in advance through simulation. For a certain modeling parameter, a sinusoidal cyclic load with a fixed Hertz and a fixed amplitude is applied to the pile foundation at different values, and the change in the lateral displacement of the pile body with the increase of the number of cycles is observed, thereby obtaining the influence curve of the modeling parameter on the pile foundation displacement. Taking the internal friction angle of the soil as an example, under the same conditions of other soil parameters, the horizontal displacement of the pile body under cyclic loading with an amplitude of 5MN and a number of cycles of 500 is simulated when the internal friction angle is 25 degrees, 30 degrees, 35 degrees and 40 degrees, respectively, thereby obtaining the influence curve of the internal friction angle on the pile body displacement under long-term cyclic loading.

[0071] For example, a sensitive interval can be determined based on the influence curve of the modeling parameters on pile displacement. This sensitive interval, i.e., the parameter range in which the modeling parameters have a significant impact on pile displacement, can be used as the adjustment interval. In other words, the sensitive interval can be understood as the range in which changes in the modeling parameters will cause significant changes in pile displacement. For instance, if preliminary simulation results indicate that when the embedment ratio is less than 10, the horizontal displacement of the pile top will decrease significantly with the increase of the embedment ratio, and when the embedment ratio of the pile tube is greater than 10, further increasing the embedment ratio will not have a significant impact on the horizontal deformation of the pile top, then the sensitive interval for the modeling parameter of embedment ratio can be determined to be less than 10.

[0072] In step S403, the parameter values ​​of the currently traversed modeling parameters are adjusted once according to the preset single adjustment amount of the currently traversed modeling parameters to obtain the adjusted three-dimensional finite element model of the pile foundation, and the pile displacement under long-term cyclic load is simulated based on the adjusted three-dimensional finite element model of the pile foundation.

[0073] For example, the preset single adjustment amount of each modeling parameter can be determined based on the length of the sensitive interval of each modeling parameter. If the sensitive interval is large, the preset single adjustment amount can be set to be larger; if the sensitive interval is small, the preset single adjustment amount can be set to be smaller. It can be customized according to needs and actual conditions. This exemplary embodiment does not impose any special limitations on this.

[0074] For the currently traversed modeling parameters, the modeling parameters can be adjusted in the direction of reducing pile displacement according to the preset single adjustment amount. For example, continuing with the above-mentioned burial depth ratio, it can be observed from the influence curve that when the burial depth ratio is less than 10, the horizontal displacement of the pile top decreases significantly with the increase of the burial depth ratio. Therefore, the preset single adjustment amount can be increased to adjust the burial depth ratio, such as increasing the burial depth ratio by 1 each time.

[0075] In step S404, it is determined whether the current parameter value of the currently traversed modeling parameter has reached the boundary of the adjustment interval. If so, proceed to step S405; otherwise, proceed to step S406.

[0076] For example, it can be determined whether the current parameter value of the currently traversed modeling parameter has reached the boundary of the adjustment interval. Taking the current traversed modeling parameter as the burial depth ratio, after adjusting the burial depth ratio, it can be determined whether the current value of the burial depth ratio has reached 10. If it has reached 10, the adjustment of the burial depth ratio is stopped, and it is determined whether the difference between the simulated pile displacement and the preset displacement when the burial depth ratio is 10 is less than the preset value. If it is less than the preset value, the traversal can be stopped, and the currently obtained adjusted three-dimensional finite element model can be directly determined as the target three-dimensional finite element model. Otherwise, the next modeling parameter is traversed according to the adjustment priority. This process is repeated until the target three-dimensional finite element model is determined or the last modeling parameter is traversed and the adjustment of the last modeling parameter is stopped.

[0077] In step S405, the adjustment of the currently traversed pile foundation parameters is stopped, and the process proceeds to step S408.

[0078] In step S406, it is determined whether the difference between the currently simulated pile displacement and the preset displacement is greater than the preset value. If so, proceed to step S403; otherwise, proceed to step S407.

[0079] For example, if the current value of the modeling parameter being traversed has not reached the boundary of the adjustment interval, it can be determined whether the difference between the currently simulated pile displacement and the preset displacement is greater than the preset value. If so, proceed to step S403 to continue adjusting the corresponding preset single adjustment amount of the currently traversed modeling parameter in the direction of reducing the pile displacement. If it is less than the preset value, it means that the three-dimensional finite element model obtained after the current adjustment has met the expectations, and the adjustment and traversal can be stopped. The three-dimensional finite element model obtained after the current adjustment can be directly determined as the target finite element model, and the adjustment and traversal can be stopped.

[0080] In step S407, the adjustment and traversal are stopped, and the currently obtained adjusted three-dimensional finite element model of the pile foundation is determined as the target three-dimensional finite element model.

[0081] In step S408, it is determined whether the difference between the currently simulated pile displacement and the preset displacement is greater than the preset value. If yes, proceed to step S401; otherwise, proceed to step S407.

[0082] In step S409, the traversal is stopped, and the currently obtained adjusted three-dimensional finite element model of the pile foundation is determined as the target three-dimensional finite element model.

[0083] For example, through steps S401 to S409 above, the three-dimensional finite element model of the pile foundation can be adjusted according to the priority of the modeling parameters. By prioritizing, the iteration efficiency and the accuracy of determining the pile foundation parameters can be improved.

[0084] Next, a detailed explanation will be given of the specific implementation method of "step S130, determining the target pile foundation parameter values ​​of the sea area to be piled based on the target three-dimensional finite element model".

[0085] In one exemplary implementation, the target pile foundation parameters for the sea area to be piled include target values ​​of the pile foundation's own attribute parameters in the sea area to be piled.

[0086] For example, after obtaining the target three-dimensional finite element model, the attribute parameter values ​​of the pile foundation itself in the target three-dimensional finite element model can be determined as the target values ​​of the attribute parameters of the pile foundation itself in the sea area to be piled, and then the pile foundation in the sea area to be piled can be constructed according to the target value.

[0087] For example, the method for determining the pile foundation parameters of offshore wind power in this disclosure further includes: if the difference between the pile displacement and the preset displacement is greater than a preset value after traversing the modeling parameters, the three-dimensional finite element model obtained after traversal is determined as the target three-dimensional finite element model; the improved pile displacement of the target three-dimensional finite element model under long-term cyclic load is simulated based on candidate improvement methods, wherein the candidate improvement methods are used to improve the pile displacement; the candidate improvement method with the smallest improved pile displacement is determined as the target improvement method; after the target pile foundation made according to the target pile foundation parameters is put into use in the sea area to be piled, the actual pile displacement of the target pile foundation is monitored; if the actual pile displacement is greater than the displacement threshold, the pile displacement is improved based on the target improvement method.

[0088] For example, if the difference between the simulated pile displacement and the preset displacement is still greater than the preset displacement after adjusting all modeling parameters sequentially, since each adjustment is aimed at reducing the pile displacement, even if the difference between the simulated pile displacement and the preset displacement is still greater after the last adjustment, this difference is the smallest difference in the simulation process. Therefore, the three-dimensional finite element model obtained from the last adjustment can be directly determined as the target three-dimensional finite element model. Then, based on candidate improvement methods, the pile displacement of the target three-dimensional finite element model under long-term cyclic loading is improved to obtain the improved pile displacement. The candidate improvement method that minimizes the improvement in pile displacement is determined as the target improvement method. During the use of the pile foundation, the actual displacement of the pile can be monitored. If the actual displacement exceeds the displacement threshold, the pile displacement can be improved through the target improvement method to reduce the rate of change of the pile displacement.

[0089] Among these, various candidate improvement methods can be obtained by collecting various existing data. For example, if a certain data shows that applying an appropriate accumulator load to the top of the pile foundation can improve the horizontal bearing capacity of the cylindrical foundation, then applying a vertical accumulator load to the top of the pile foundation can be considered as an improvement method.

[0090] For example, seismic loads can also be considered during the simulation. By simulating the displacement of the pile body under seismic loads, the safety of the pile foundation under seismic loads can be improved.

[0091] The method disclosed herein improves the accuracy and efficiency of determining pile foundation parameters compared to manual calculations based on experience.

[0092] Furthermore, it should be noted that the above figures are merely illustrative representations of the processes included in the method according to exemplary embodiments of the present invention, and are not intended to be limiting. It is readily understood that the processes shown in the above figures do not indicate or limit the temporal order of these processes. Additionally, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0093] Furthermore, an exemplary embodiment of this disclosure also provides a device 500 for determining the foundation parameters of offshore wind power. (See reference...) Figure 5 As shown, the offshore wind power pile foundation parameter determination device 500 includes the following program modules: a simulation module 510, configured to apply a cyclic load of a first preset duration to the three-dimensional finite element model of the constructed pile foundation to simulate the pile displacement under long-term cyclic load, wherein the load parameters of the cyclic load are determined according to the environmental load of the sea area to be piled; an adjustment module 520, configured to adjust the three-dimensional finite element model of the pile foundation when the difference between the pile displacement and the preset displacement is greater than a preset value, and continue to simulate the pile displacement under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until a target three-dimensional finite element model is obtained; and a pile foundation parameter determination module 530, configured to determine the target pile foundation parameter values ​​of the sea area to be piled based on the target three-dimensional finite element model.

[0094] In one exemplary embodiment, the environmental load includes wave load, and the load parameters of the wave load include wave amplitude and wave period. Based on this, the simulation module 510 described above can be specifically configured to: acquire the wave period and wave amplitude of the sea area to be piled, and count the first occurrence frequency of each collected wave period and the second occurrence frequency of each collected wave amplitude; determine the wave period with the highest first occurrence frequency as the target period, and determine the wave amplitude with the highest second occurrence frequency as the target amplitude; generate a cyclic load of sinusoidal waveform pattern based on the target period with the target amplitude as the maximum amplitude; and apply the cyclic load of the sinusoidal waveform pattern for a first preset duration to the pile top coupling reference point of the three-dimensional finite element model of the pile foundation.

[0095] In one exemplary embodiment, the three-dimensional finite element model of the pile foundation is determined by the modeling parameters of the pile foundation, which include material parameters, including structural damping parameters.

[0096] In one exemplary embodiment, the initial three-dimensional finite element model is determined by: determining at least one reference sea area for the sea area to be piled based on the similarity between the sea area parameters of the sea area to be piled and the sea area parameters of sample sea areas in the sample library, wherein the sample sea areas include piled sea areas, and the sea area parameters include geological parameters and environmental parameters; obtaining the actual pile displacement of the pile foundation in each reference sea area within a second preset time period after being put into use; determining the target sea area from the reference sea areas based on the pile foundation performance requirements of the sea area to be referenced and the actual pile displacement of each reference sea area; and determining the initial three-dimensional finite element model based on the pile foundation parameters of the target sea area.

[0097] In one exemplary embodiment, the three-dimensional finite element model of the pile foundation is determined based on the modeling parameters of the pile foundation. The step of adjusting the three-dimensional finite element model of the pile foundation and continuing to simulate the pile displacement under long-term cyclic loading based on the adjusted three-dimensional finite element model until the target three-dimensional finite element model is obtained includes: a single adjustment step: traversing the modeling parameters based on the adjustment priority of the modeling parameters, determining the adjustment range of the currently traversed modeling parameters based on the influence curve of the currently traversed modeling parameters on the pile foundation displacement, and adjusting the parameter values ​​of the currently traversed modeling parameters once according to the preset single adjustment amount to obtain the adjusted three-dimensional finite element model of the pile foundation, and simulating the pile displacement under long-term cyclic loading based on the adjusted three-dimensional finite element model of the pile foundation; a second adjustment step: when the difference between the simulated pile displacement and the preset displacement is large... Under the condition of preset discrepancies, the modeling parameters currently traversed are adjusted again according to the preset single adjustment amount until the simulated pile displacement is less than the preset displacement or the current parameter value of the currently traversed modeling parameter reaches the boundary of the adjustment interval. Then, the adjustment of the currently traversed pile foundation parameters is stopped. If the adjustment of the currently traversed modeling parameter is stopped because the current parameter value of the currently traversed modeling parameter reaches the boundary of the adjustment interval, the next modeling parameter is traversed, and the above single adjustment step and the second adjustment step are performed on the next traversed modeling parameter. If the adjustment of the currently traversed modeling parameter is stopped because the simulated pile displacement is less than the preset displacement, the traversal of the modeling parameters is stopped, and the currently obtained adjusted three-dimensional finite element model of the pile foundation is determined as the target three-dimensional finite element model.

[0098] In one exemplary embodiment, the types of modeling parameters include pile foundation property parameters and marine geological parameters of the sea area to be piled. The adjustment priority of the modeling parameters is determined based on the degree of influence of the modeling parameters on the pile displacement and the type of the modeling parameters.

[0099] In one exemplary embodiment, the device further includes an improvement module, which can be specifically configured to: determine the three-dimensional finite element model obtained after traversing the modeling parameters as the target three-dimensional finite element model if the difference between the pile displacement and the preset displacement is greater than a preset value; simulate the improved pile displacement of the target three-dimensional finite element model under long-term cyclic loading based on candidate improvement methods, wherein the candidate improvement methods are used to improve the pile displacement; determine the candidate improvement method with the smallest improved pile displacement as the target improvement method; monitor the actual pile displacement of the target pile foundation after the target pile foundation designed according to the target pile foundation parameters is put into use in the sea area to be piled; and improve the pile displacement based on the target improvement method if the actual pile displacement is greater than the displacement threshold.

[0100] The specific details of each part of the above-mentioned device have been described in detail in the method section of the implementation plan. For any undisclosed details, please refer to the implementation plan of the method section, and therefore will not be repeated here.

[0101] It should be noted that although several modules or units for the device used to perform actions have been mentioned in the detailed description above, this division is not mandatory. In fact, according to exemplary embodiments of this disclosure, the features and functions of two or more modules or units described above can be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided and embodied by multiple modules or units.

[0102] Furthermore, although the steps of the method in this disclosure are described in a specific order in the accompanying drawings, this does not require or imply that the steps must be performed in that specific order, or that all the steps shown must be performed to achieve the desired result. Additional or alternative steps may be omitted, multiple steps may be combined into one step, and / or a step may be broken down into multiple steps.

[0103] An exemplary embodiment of this disclosure also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, implements the above-described method for determining the foundation parameters of offshore wind power.

[0104] In one implementation, the computer program product can be a tangible product containing a computer program, such as a computer-readable storage medium storing the computer program. The readable storage medium can be a storage medium based on electrical, magnetic, optical, electromagnetic, infrared, or other signals, including but not limited to: random access memory (RAM), read-only memory (ROM), magnetic tape, floppy disk, flash memory, hard disk drive (HDD), solid-state drive (SSD), etc. For example, the computer program product can be implemented as a non-volatile storage medium storing a computer program, such as read-only memory, NAND flash memory, etc.

[0105] In one implementation, the computer program product can be an intangible product containing a computer program. For example, the computer program product can be implemented as a virtual digital product, such as an executable file, installation package, or other digital file storing the computer program.

[0106] Computer program code can be written in one or more programming languages. Examples of programming languages ​​include C, Java, C++, and Python. Program code can execute entirely on the user's computing device, partially on the user's computing device, or as a standalone software package. It can also execute partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, such as a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via an internet connection provided by a mobile network operator).

[0107] Computer programs can be carried or transmitted via signals such as electricity, magnetism, light, electromagnetic radiation, and infrared radiation. Electronic devices can convert the signals carrying computer programs into digital signals, thereby running the computer programs. When a computer program runs on an electronic device, its code is used to cause the electronic device to execute (more specifically, the processor of the electronic device to execute) the method steps of various exemplary embodiments of this disclosure, such as the above-described method for determining the pile foundation parameters of offshore wind power.

[0108] Exemplary embodiments of this disclosure also provide an electronic device, which may include a processor and a memory. The memory stores executable instructions of the processor, such as a computer program. The processor executes the executable instructions to perform the method steps of various exemplary embodiments of this disclosure. Furthermore, the electronic device may also include a display for displaying a graphical user interface.

[0109] The following is for reference. Figure 6 The electronic device is illustrated by way of a general-purpose computing device. It should be understood that... Figure 6 The electronic device 600 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments disclosed herein.

[0110] like Figure 6 As shown, the electronic device 600 may include: a processor 610, a memory 620, a bus 630, an I / O (input / output) interface 640, a network adapter 650, and a display 660.

[0111] Memory 620 may include volatile memory, such as RAM 621 and cache unit 622, and may also include non-volatile memory, such as ROM 623. Memory 620 may also include one or more program modules 624, such program modules 624 including, but not limited to: operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. For example, program module 624 may include the modules in the above-described device.

[0112] The processor 610 may include one or more processing units, such as an AP (Application Processor), a modem processor, a GPU (Graphics Processing Unit), an ISP (Image Signal Processor), a controller, an encoder, a decoder, a DSP (Digital Signal Processor), a baseband processor, and / or an NPU (Neural-Network Processing Unit).

[0113] The processor 610 can be used to execute executable instructions stored in the memory 620, such as the above-mentioned method for determining the pile foundation parameters of offshore wind power.

[0114] Bus 630 is used to connect different components of electronic device 600 and may include a data bus, an address bus and a control bus.

[0115] Electronic device 600 can communicate with one or more external devices 700 (such as keyboard, mouse, external controller, etc.) through I / O interface 640.

[0116] Electronic device 600 can communicate with one or more networks via network adapter 650. For example, network adapter 650 can provide mobile communication solutions such as 3G / 4G / 5G, or wireless communication solutions such as wireless LAN, Bluetooth, and near-field communication. Network adapter 650 can communicate with other modules of electronic device 600 via bus 630.

[0117] The electronic device 600 can display a graphical user interface via a monitor 660, such as displaying a three-dimensional finite element model interface.

[0118] although Figure 6 Other hardware and / or software modules, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, may also be configured in the electronic device 600.

[0119] Those skilled in the art will understand that various aspects of this disclosure can be implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which may be referred to as "circuit", "module" or "system" respectively.

[0120] It should be understood that this disclosure is not limited to the specific methods, steps, or structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. Those skilled in the art will readily conceive of other embodiments based on the specific implementations provided in this disclosure. Therefore, the specific implementations provided in this disclosure are merely exemplary, and the scope and spirit of this disclosure are indicated by the claims, and should cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary technical means in the art not disclosed in this disclosure.

Claims

1. A method for determining parameters of a pile foundation of an offshore wind turbine, characterized in that, The method comprises the following steps: applying a first preset duration of cyclic load to a built three-dimensional finite element model of a pile foundation to simulate the pile body displacement of the pile foundation under long-term cyclic load, wherein the load parameters of the cyclic load are determined according to the environmental load of the sea area to be piled; if the difference between the pile body displacement and the preset displacement is greater than a preset value, adjusting the three-dimensional finite element model of the pile foundation, and continuing to simulate the pile body displacement of the pile foundation under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until a target three-dimensional finite element model is obtained; determining the target pile foundation parameter value of the sea area to be piled according to the target three-dimensional finite element model; wherein the three-dimensional finite element model of the pile foundation is determined according to the modeling parameters of the pile foundation, and the adjusting the three-dimensional finite element model of the pile foundation, and continuing to simulate the pile body displacement of the pile foundation under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until a target three-dimensional finite element model is obtained comprises a single adjustment step: traversing the modeling parameters based on the adjustment priority of the modeling parameters, determining the adjustment interval of the currently traversed modeling parameter based on the influence curve of the currently traversed modeling parameter on the pile displacement, and performing a single adjustment on the parameter value of the currently traversed modeling parameter according to a preset single adjustment amount of the currently traversed modeling parameter to obtain an adjusted three-dimensional finite element model of the pile foundation, and simulating the pile body displacement of the pile foundation under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation; a re-adjustment step: if the difference between the simulated pile body displacement and the preset displacement is greater than a preset difference, performing a re-single adjustment on the currently traversed modeling parameter according to the preset single adjustment amount until the currently simulated pile body displacement and the preset displacement are less than a preset value or the current parameter value of the currently traversed modeling parameter reaches the boundary of the adjustment interval, then stopping the adjustment of the currently traversed pile foundation parameter; if the stopping of the adjustment of the currently traversed modeling parameter is based on the current parameter value of the currently traversed modeling parameter reaching the boundary of the adjustment interval, continue to traverse the next modeling parameter and perform the above-mentioned single adjustment step and re-adjustment step on the next traversed modeling parameter; if the stopping of the adjustment of the currently traversed modeling parameter is based on the currently simulated pile body displacement and the preset displacement being less than a preset value, stop traversing the modeling parameters, and determine the currently obtained adjusted three-dimensional finite element model of the pile foundation as the target three-dimensional finite element model.

2. The method of claim 1, wherein, The environmental load includes wave load, and the load parameters of the wave load include wave amplitude and wave period. The step of applying a first preset duration of cyclic load to a built three-dimensional finite element model of a pile foundation comprises the following steps: acquiring the wave period and wave amplitude of the sea area to be piled, and counting the first occurrence frequency of each wave period and the second occurrence frequency of each wave amplitude; determining the wave period with the highest first occurrence frequency as the target period, and determining the wave amplitude with the highest second occurrence frequency as the target amplitude; generating a cyclic load in a sinusoidal waveform pattern based on the target period and taking the target amplitude as the maximum amplitude; The cyclic load of the sinusoidal wave pattern for a first preset time length is applied on a coupling reference point on the top of the pile in the three-dimensional finite element model of the pile foundation.

3. The method of claim 1, wherein, The three-dimensional finite element model of the pile foundation is determined by modeling parameters of the pile foundation, and the modeling parameters of the pile foundation include material parameters, and the material parameters include structural damping parameters.

4. The method of claim 1, wherein, The initial three-dimensional finite element model is determined in the following manner: At least one reference sea area of the to-be-piled sea area is determined according to the similarity between the sea area parameters of the to-be-piled sea area and the sample sea areas in a sample library, wherein the sample sea areas include piled sea areas, and the sea area parameters include geological parameters and environmental parameters; Actual pile body displacement of the pile foundation of each reference sea area within a second preset time length after being put into use is obtained, and a target sea area is determined from the reference sea areas according to pile foundation performance requirements of the to-be-referenced sea area and the actual pile body displacement of each reference sea area; The initial three-dimensional finite element model is determined according to the pile foundation parameters of the target sea area.

5. The method of claim 1, wherein, The types of the modeling parameters include pile foundation attribute parameters and sea area geological parameters of the to-be-piled sea area, and the adjustment priority of the modeling parameters is determined according to the influence degree of the modeling parameters on the pile body displacement and the types of the modeling parameters.

6. The method of claim 1, wherein, The method further includes: In a case where a difference between the simulated pile body displacement and the preset displacement after the modeling parameters are traversed is greater than a preset value, the three-dimensional finite element model obtained after the traversal is determined as a target three-dimensional finite element model; An improved pile body displacement of the target three-dimensional finite element model under long-term cyclic load is simulated based on a candidate improvement mode used for improving the pile body displacement; A candidate improvement mode with the minimum improved pile body displacement is determined as a target improvement mode; After a target pile foundation made according to the target pile foundation parameter value is put into use in the to-be-piled sea area, an actual pile body displacement of the target pile foundation is monitored; In a case where the actual pile body displacement is greater than a displacement threshold, the pile body displacement is improved based on the target improvement mode.

7. A device for determining parameters of a pile foundation of an offshore wind power plant, characterized in that It includes: A simulation module configured to apply a cyclic load for a first preset time length to the built three-dimensional finite element model of the pile foundation to simulate a pile body displacement of the pile foundation under long-term cyclic load, wherein a load parameter of the cyclic load is determined according to an environmental load of the to-be-piled sea area; An adjustment module configured to adjust the three-dimensional finite element model of the pile foundation in a case where a difference between the pile body displacement and a preset displacement is greater than a preset value, and continue to simulate the pile body displacement of the pile foundation under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation until a target three-dimensional finite element model is obtained; A pile foundation parameter determination module configured to determine a target pile foundation parameter value of the to-be-piled sea area according to the target three-dimensional finite element model. The three-dimensional finite element model of the pile foundation is determined according to modeling parameters of the pile foundation, the three-dimensional finite element model of the pile foundation is adjusted, and the pile body displacement of the pile foundation under long-term cyclic load is simulated based on the adjusted three-dimensional finite element model of the pile foundation until a target three-dimensional finite element model is obtained, including: a single adjustment step: traversing the modeling parameters based on an adjustment priority of the modeling parameters, determining an adjustment interval of the currently traversed modeling parameter based on an influence curve of the currently traversed modeling parameter on the pile displacement, performing single adjustment on a parameter value of the currently traversed modeling parameter according to a preset single adjustment amount of the currently traversed modeling parameter to obtain an adjusted three-dimensional finite element model of the pile foundation, and simulating the pile body displacement of the pile foundation under long-term cyclic load based on the adjusted three-dimensional finite element model of the pile foundation; a re-adjustment step: in a case where a difference between the simulated pile body displacement and a preset displacement is greater than a preset difference, performing re-single adjustment on the currently traversed modeling parameter according to the preset single adjustment amount until the currently simulated pile body displacement and the preset displacement are less than a preset value or a current parameter value of the currently traversed modeling parameter reaches a boundary of the adjustment interval, and then stopping adjustment on the currently traversed pile foundation parameter; in a case where stopping adjustment on the currently traversed modeling parameter is based on the current parameter value of the currently traversed modeling parameter reaching the boundary of the adjustment interval, continuing to traverse a next modeling parameter, and performing the single adjustment step and the re-adjustment step on the traversed next modeling parameter; in a case where stopping adjustment on the currently traversed modeling parameter is based on the currently simulated pile body displacement and the preset displacement being less than the preset value, stopping traversal of the modeling parameters, and determining the currently obtained adjusted three-dimensional finite element model of the pile foundation as the target three-dimensional finite element model.

8. A computer program product comprising a computer program, characterized in that, The computer program is executed by the processor to implement the method of any one of claims 1-6.

9. An electronic device, comprising: comprising: one or more processors; a storage device for storing one or more programs, which when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-6.

Images