A method for automatically checking deformation of offshore converter station topside construction

Abstract

The application discloses a kind of offshore converter station upper block construction deformation automatic checking method, belong to offshore engineering model processing technical field, including the following contents: step S1, the construction model of offshore converter station upper block is established and the node number and beam structure information are stored, construction load is applied to construction model and finite element calculation is executed, the deflection data of each node of construction model is obtained, node number is associated with deflection data and is stored;Step S2, the span of corresponding beam structure is calculated according to beam structure information;Step S3, the relative deformation gradient of node is calculated according to deflection data and span;Step S4, the relative deformation gradient calculated is compared with preset specification limit value, and the automatic checking of node deformation is completed.The application adopts the deformation checking mode of automation, improves the efficiency and accuracy of deformation checking, and effectively avoids the risk of data loss caused by the flash-off of SACS software when processing large-scale post-processing data.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering model processing technology, specifically relating to an automatic verification method for the construction deformation of the upper module of an offshore converter station. Background Technology

[0002] As the core hub for power transmission in offshore wind farms, the construction quality of the superstructure of an offshore converter station directly determines the structural safety and operational stability of the entire station. The superstructure of an offshore converter station is complex, comprising multiple decks, main beams, secondary beams, and foundations for various equipment. During construction, the superstructure must withstand complex external forces such as wind loads and equipment loads, making it highly susceptible to structural deformation. If the deformation exceeds the allowable range specified in the standards, it can lead to problems such as insufficient overall construction precision, inadequate equipment installation precision, and excessive residual stress in local structures.

[0003] Therefore, deformation verification is necessary during construction. In existing technologies, deformation verification of the superstructure of offshore converter stations mainly relies on specialized structural analysis software such as SACS for calculation, followed by manual data reading, processing, and verification by engineering designers. This method has the following problems: First, the SACS software frequently crashes or fails to display node deflection and other data when opening large construction model calculation result files, affecting the verification progress. Second, the superstructure includes a large number of main beams, secondary beams, and equipment foundations. The calculation methods for the span, relative deflection, and deformation gradient of different components vary, resulting in a large workload and a high risk of errors during manual calculations. Third, manual verification is difficult to fully match the deformation gradient requirements for various components in the "Design Code for Offshore Converter Stations in Wind Farm Projects," leading to omissions and errors, failure to identify dangerous deformation nodes in a timely manner, and difficulty in providing accurate guidance for structural optimization. Summary of the Invention

[0004] This invention provides an automatic deformation verification method for the construction of the superstructure of an offshore converter station, which solves the problems of low verification efficiency and poor accuracy caused by the instability of SACS software in processing large models, the large workload and error-prone nature of manual calculation of span and deformation gradient, and the difficulty in fully meeting the requirements of specifications in existing deformation verification.

[0005] The objective of this invention can be achieved through the following technical solutions: An automatic verification method for the construction deformation of the superstructure of an offshore converter station includes the following steps: Step S1: Establish a construction model of the upper module of the offshore converter station and store the node number and beam structure information. Apply construction load to the construction model and perform finite element calculation to obtain the deflection data of each node of the construction model. Associate the node number with the deflection data and store it. Step S2: Calculate the span of the corresponding beam structure based on the beam structure information; Step S3: Calculate the relative deformation gradient of the node based on the deflection data and the span; Step S4: Compare the calculated relative deformation gradient with the preset specification limit to complete the automatic verification of node deformation.

[0006] Preferably, the beam structure information includes beam type, beam element, and axis position; the calculation of the span of the corresponding beam structure in step S2 includes: using different span calculation methods according to the beam type, the beam type includes main beam and secondary beam; each beam structure is discretized into at least one beam element, and each beam element has two nodes at both ends. If both nodes of the beam element are located on the same axis, it is a main beam; otherwise, it is a secondary beam.

[0007] Preferably, the beam structure information also includes the effective length of the main beam, and the span calculation method of the main beam is as follows: if the effective length of the main beam is defined in the construction model, then the effective length is read as the span of the main beam; otherwise, the distance between the adjacent axes of the current node is used as the span. When the effective length is greater than the distance between adjacent axes, search for adjacent main beams on the extension line of the main beam until the sum of the lengths of multiple main beam segments equals the effective length, and use the sum of the lengths of multiple main beam segments as the span.

[0008] Preferably, the method for calculating the span of the secondary beam is as follows: identify the orthogonal beams that are orthogonally connected to the current secondary beam, and use the distance between the two orthogonal beams as the span of the secondary beam.

[0009] Preferably, the beam type further includes an equipment foundation, and the span calculation method for the equipment foundation is as follows: search for the secondary beam nodes at the bottom of the equipment foundation based on the spatial location information of the equipment foundation, then search for the main beams connected to the secondary beam nodes based on the node numbers, and calculate the spacing between the main beams in two orthogonal directions as the span of the equipment foundation.

[0010] Preferably, after step S2 and before step S3, the method further includes a step of calculating the maximum relative deflection of the node: for a simply supported beam with two support points, the relative deflection of the node with respect to the two support points is calculated based on the node deflection data, and the larger value is taken as the maximum relative deflection of the node; in step S3, the relative deformation gradient is calculated based on the maximum relative deflection and the span.

[0011] Preferably, it also includes a multi-layer deck cyclic verification step: starting from the bottom deck, steps S1 to S4 are performed sequentially on each deck upwards. After the deformation verification of one deck is completed, the process automatically moves to the next deck until all deck layers have been verified.

[0012] Preferably, the method also includes a result output step: automatically outputting the verification result of each node to an EXCEL file, wherein the verification result includes node number, deflection, span, relative deformation gradient, and judgment information on whether the preset specification limit is met.

[0013] Preferably, the preset standard limits are set according to the "Design Specification for Offshore Converter Stations of Wind Farm Projects", with the deformation threshold of the main beam being 1 / 400, the deformation threshold of the secondary beam being 1 / 250, and the deformation threshold of the foundation of equipment such as the valve hall being 3 / 1000.

[0014] Preferably, the construction load in step S1 includes at least one or more of wind load, structural self-weight, and temporary construction load.

[0015] The beneficial effects of this invention are as follows: 1. This invention avoids the tedious process of manually reading SACS software results, manually organizing deflection data, manually calculating deformation gradients and comparing them with standard values, thus improving the efficiency and accuracy of deformation verification. It also effectively avoids the risk of data loss due to potential crashes of SACS software when processing large-scale post-processing data, ensuring the safety and controllability of the construction process for large and complex structures such as the superstructure of offshore converter stations.

[0016] 2. This invention can automatically check the block deformation according to the "Design Specification for Offshore Converter Stations" and output the failed nodes, thus pointing out the accurate direction for structural optimization. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 The verification flowchart provided for this invention.

[0019] Figure 2 The flowchart for the automated verification and deformation process provided by this invention.

[0020] Figure 3 This is a schematic diagram of the distribution structure of a certain deck beam type provided by the present invention.

[0021] Legend: 1. Axis; 2. Main beam; 3. Secondary beam; 4. Equipment foundation. Detailed Implementation

[0022] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0023] like Figures 1-3As shown, an automatic verification method for the construction deformation of the superstructure of an offshore converter station includes the following: Step S1: Establish a construction model of the superstructure of the offshore converter station and store node numbers and beam structure information. Apply construction loads to the construction model and perform finite element calculations to obtain the deflection data of each node in the construction model. Deflection refers to the vertical displacement of the node in the direction perpendicular to the deck plane. The entire text stipulates that downward deflection is a positive value. Associate the node number with the deflection data and store it. By establishing a construction model containing complete structural topology information and performing finite element calculations, the program reads the calculation model and calculation results, and associates and stores the originally discrete and unstructured calculation results (node ​​deflection) with the node numbers in the model one by one. This solves the problem of low efficiency and error-proneness in manually searching and transcribing data from massive calculation output files.

[0024] Step S2: Calculate the span of the corresponding beam structure based on the beam structure information; the span is automatically calculated based on the beam structure information, avoiding the errors caused by manually measuring or estimating the span based on the model.

[0025] Step S3: Calculate the relative deformation gradient of the node based on the deflection data and span. The relative deformation gradient is the ratio of the maximum relative deflection of the node to the span, i.e., the deflection-to-span ratio, which is usually expressed as a fraction, such as 1 / 250. Calculate the index that measures the structural deformation, i.e., the relative deformation gradient, using the associated deflection data and span. Step S4 compares the calculated relative deformation gradient with the preset specification limit to complete the automatic verification of node deformation, forming an automated closed loop from model calculation to result determination.

[0026] In summary, this embodiment avoids the tedious process of manually reading SACS software results, manually organizing deflection data, manually calculating deformation gradients and comparing them with standard values, thus improving the efficiency and accuracy of deformation verification. It also effectively avoids the risk of data loss due to potential crashes of SACS software when processing large-scale post-processing data, ensuring the safety and controllability of the construction process for large and complex structures such as the superstructure of offshore converter stations.

[0027] In one embodiment, in the superstructure of an offshore converter station, the stress patterns and support conditions of the main beams and secondary beams differ. A differentiated span definition method is needed to accurately calculate their deformation gradient. Specifically, the beam structure information includes beam type, beam section parameters, beam spatial location, connection method, and axis position. The axis refers to the baseline used to locate the column grid or main beam in the marine structure. Step S2, calculating the span of the corresponding beam structure, includes using different span calculation methods based on the beam type, which includes main beams and secondary beams. Each beam structure is discretized into at least one beam element, and each beam element has two nodes at both ends. If both nodes of a beam element are located on the same axis, it is a main beam; otherwise, it is a secondary beam. This embodiment provides an accurate prerequisite for subsequent targeted use of different span calculation methods through automated beam type identification based on axis relationships. This ensures that the bending deformation of both the main beam and the secondary beam can be independently checked to conform to their mechanical properties, avoiding structural safety hazards caused by mixing different check standards.

[0028] In one embodiment, a main beam may lack sufficient support across multiple standard axes due to equipment layout requirements, resulting in a span much larger than the axis spacing. Simply using the spacing between adjacent axes as the span would underestimate the actual deformation span, leading to a dangerously biased verification result. The beam structure information also includes the effective length of the main beam. The span calculation method for the main beam is as follows: first, check if the effective length parameter is defined for the main beam in the model. If the effective length is defined in the construction model, then the effective length is read as the span of the main beam; otherwise, the spacing between the adjacent axes of the current node is used as the span of the main beam.

[0029] When the effective length equals the distance between adjacent axes, this distance is the span. For cases where the effective length is greater than the distance between adjacent axes, the program automatically searches for adjacent main beams along the axis of the main beam and accumulates the lengths of the searched main beams until the sum equals the effective length. At this point, the total accumulated length is taken as the actual span of the main beam, and the endpoints at both ends are the support points of the main beam. This embodiment can intelligently identify and correctly handle the case of "long-span main beams", ensuring that the span value on which the main beam deformation gradient calculation is based is strictly consistent with the distance between its actual stress support points, thereby obtaining a true and reliable verification conclusion.

[0030] In one embodiment, secondary beams are typically supported at both ends by two parallel main beams / other secondary beams, and it is assumed that beams intersecting with the secondary beams can provide effective support. Therefore, the span of a secondary beam is the vertical distance between the two main beams / secondary beams. After identifying a beam as a secondary beam, the program automatically retrieves the main beams / secondary beams connected to its two end nodes and orthogonal to them, and calculates the distance between these two orthogonal connection points, i.e., the vertical distance between the two parallel main beams / secondary beams. This distance is read as the span of the current secondary beam, enabling rapid, batch calculation of a large number of secondary beam spans without any manual intervention. The program can automatically handle complex connection relationships in orthogonal beam systems, providing a reliable data foundation for the accurate calculation and verification of subsequent secondary beam deformation gradients, greatly improving the automation and accuracy of the verification work.

[0031] In one embodiment, the foundations of equipment such as converter valves and GIS are not placed directly on a single secondary beam, but are supported at their base on a grid structure composed of multiple secondary beams and main beams. Therefore, the deformation of the equipment foundation is greatly affected by the span of the supporting grid. The method for calculating the span of the equipment foundation is as follows: based on the spatial location information of the equipment foundation, the secondary beam nodes at the bottom of the equipment foundation (i.e., equipment foundation nodes) are searched; then, based on the secondary beam node numbers, the connected main beams are searched. The nodes where the secondary beams intersect with the main beams are the supporting nodes. The distance between the main beams in two directions orthogonal to the secondary beams is calculated as the span of the secondary beam of the equipment foundation. This method can automatically calculate the supporting grid span corresponding to each equipment foundation, ensuring that the deformation gradient check of the equipment foundation reflects its actual support conditions and guaranteeing the structural safety of core equipment such as converter valves and reactors during construction and service.

[0032] In one embodiment, for a simply supported beam, the maximum deformation typically occurs near the mid-span. However, multiple nodes on a beam often have different relative deflections relative to their left and right support points. For example, a node near the left support point may have a small deflection relative to the left support point, but a larger deflection relative to the right support point. The maximum of the two relative deflections needs to be taken to calculate the most unfavorable deformation gradient. Therefore, after step S2 and before step S3, a step of calculating the maximum relative deflection of the node is included: for a simply supported beam with two support points, the relative deflection of the node relative to the two support points is calculated based on the node deflection data, and the larger value is taken as the maximum relative deflection of the node; in step S3, the relative deformation gradient is calculated based on the maximum relative deflection and the span.

[0033] In one embodiment, the lower deck serves as the foundation for the construction of the upper deck. Construction of the upper deck can only proceed after the lower deck's deformation has passed inspection. The system also includes a multi-layered deck cyclical verification process: starting from the bottom deck, steps S1 to S4 are executed sequentially for each deck upwards. After verifying the deformation of one deck, the system automatically moves to the next, continuing until all deck layers have been verified. If a deck's verification fails to meet the specified limits, the program issues a warning and allows the user to choose whether to continue verifying the next higher deck. The process is then re-executed after design modifications. This approach solves the problems of the enormous workload and the high risk of errors such as information confusion and omissions in verification caused by manual layer-by-layer modeling, calculation, and verification. It achieves automated and seamless deformation verification from the first to the last deck, ensuring that each deck is verified based on stable support provided by its substructure, accurately reflecting the mechanical state during construction.

[0034] In one embodiment, the method further includes a result output step: calling an automation interface to automatically output the verification results of each node to an EXCEL file. The verification results include node number, deflection, span, relative deformation gradient, and judgment information on whether the preset specification limits are met. This provides a clear, complete, and electronically archiveable verification report. Designers can directly filter out all failed nodes, quickly locate specific components, such as "4th deck secondary beam node 4105," and, based on the data provided by the program, such as deflection of 30mm, span of 5m, and deformation gradient of 1 / 167, directly determine whether to increase the beam cross-section, reduce the span, or replace the material, thereby efficiently completing structural optimization and quickly reviewing the results after optimization.

[0035] In one embodiment, the preset specification limits are set according to the "Design Specification for Offshore Converter Stations in Wind Farm Projects". After the program calculates the actual deformation gradient of a node, it automatically calls the specification limits of the corresponding beam type (main beam / secondary beam / equipment foundation) for comparison. By digitizing and embedding industry design specifications, the entire verification process fully complies with standard requirements, eliminating verification failures caused by human error in referencing incorrect specifications or limits. Specifically, the deformation threshold for the main beam is 1 / 400, the deformation threshold for the secondary beam is 1 / 250, and the deformation threshold for equipment foundations such as valve halls is 3 / 1000.

[0036] In one embodiment, the load borne by the upper module of an offshore converter station during construction is different from that during operation, and must be applied accurately to simulate real deformation. In step S1, the construction load includes at least one or more of wind load, structural self-weight and temporary construction load. This solves the problem in the prior art that only structural self-weight is often considered, while wind load and construction live load are ignored, which makes the deformation calculation result far smaller than the actual value and causes distortion of the check. This allows the finite element calculation working condition to be as close as possible to the real construction environment. Especially for deep-sea environments, wind load is a controlling load. After including it in the calculation, the calculated node deflection value can better reflect the actual response of the structure, thereby ensuring that all subsequent deformation gradient check results are based on a real and comprehensive stress state, which greatly improves the reliability of the check and the safety guarantee level of the structure.

[0037] Specific implementation process: Taking the upper module of an offshore converter station supporting a deep-sea offshore wind farm as the application object, the upper module has a total of 9 decks, numbered from 1 to 9, with layer 1 being the bottommost deck and layer 9 being the topmost deck. Each deck includes main girders, secondary beams and various equipment foundations, and needs to withstand offshore wind load and equipment load during construction. The specific implementation steps are as follows: Preparations: Clarify the structural parameters of the 9 decks of the upper module of the offshore converter station and the spatial distribution positions of main equipment; the axis spacing of the main girders is uniformly 8m, some main girders are defined with an effective length Ly=8m, and some main girders have Ly=16m due to structural layout requirements; all secondary beams are connected to orthogonal main girders, and all equipment foundations are arranged above the secondary beams. It is determined that the construction sequence of each deck is layer-by-layer construction from layer 1 to layer 9, and deformation check shall be carried out after the completion of each layer, and the construction of the upper layer can be carried out only after passing the check.

[0038] Meanwhile, it is determined that the basis for deformation check is the *Code for Design of Offshore Converter Station for Wind Farm Engineering*, in which the deformation gradient limit of the main girder is 1 / 400, the deformation gradient limit of the secondary beam is 1 / 250. The equipment foundation includes converter valves, reactors, GIS, and connecting transformers, and the foundation deformation gradient limit is 3 / 1000.

[0039] Start the automatic check program: set the number of deck layers parameter to 9, start the cyclic check mode, and complete the deformation check of 9 decks in sequence starting from the 1st deck. The specific check steps for a single deck (taking the 3rd deck as an example) are as follows: Model establishment and calculation: For the 3rd deck, establish a construction model of layers 1 to 3 (below the 3rd deck) in SACS software, simulate the actual working condition after the completion of construction of the 3rd deck, apply wind load and equipment load, perform construction working condition calculation, and obtain the displacement calculation results of all nodes of the 3rd deck.

[0040] Model Information Retrieval: The automated program retrieves the 3-deck model information from the SACS software and stores the node numbers of all nodes on the 3-deck structure, based on the structural scope of the 3-deck structure. The node numbers range from 3001 to 3860, along with the node's 3D coordinates, effective main beam length, and beam end-point composition information. It also automatically filters out node and component information from the 1st and 2nd decks that is irrelevant to the 3rd deck, reducing data redundancy.

[0041] Deflection data matching: The program automatically reads the deflection data of all nodes on the three decks in the SACS calculation results, matches them one by one according to the node number, and stores the node number with the corresponding deflection data to form a node deflection lookup table. This eliminates the need for manual reading and sorting, avoiding human error in data reading.

[0042] Span calculation: According to the span calculation method described in the invention, the spans of the main beams, secondary beams, and equipment foundations of the three decks are calculated respectively.

[0043] Maximum relative deflection calculation: For all simply supported beams (main beams and secondary beams) in the three decks, the program automatically identifies two support points for each beam, determines two base points for calculating relative deflection, calculates the relative deflection in both directions, and takes the maximum value as the maximum relative deflection of that node. For cantilever beams at the deck edge, there is only one support point, and only the relative deflection in one direction needs to be checked. For example, for node 3508 of the main beam in the three decks, the relative deflections in the two directions are 12mm and 10mm, respectively, and the program automatically outputs the maximum relative deflection as 12mm.

[0044] Deformation gradient calculation: Based on the maximum relative deflection of the node and the span, the program automatically calculates the relative deformation gradient of each node. For example, the maximum relative deflection of node 3508 is 12mm, and the span is 8m (8000mm), so the calculated deformation gradient is 12 / 8000=1 / 667.

[0045] Deformation verification: The program automatically calls the deformation gradient limit value in the "Design Code for Offshore Converter Stations of Wind Farm Projects" to verify all nodes on the 3rd deck: The deformation gradient of node 3508, 1 / 667, is less than the limit value of the main beam, 1 / 400, and is judged to be qualified; If a node (such as secondary beam node 3612) has a maximum relative deflection of 30mm and a span of 5000mm, the deformation gradient is 30 / 5000=1 / 167, which is greater than the limit value of the secondary beam, 1 / 250, and is judged to be unqualified. The program automatically marks the node as a failed node and records its number, deflection, span, and deformation gradient data.

[0046] Output results: After completing the deformation check of all nodes on the three decks, the program automatically outputs the check results to an EXCEL file, which is convenient for designers to view, archive and optimize the structure.

[0047] Cyclic verification: After the verification of the 3rd deck is completed, the program will automatically start the deformation verification of the next deck (4th deck). Repeat the above steps to complete the deformation verification of the 4th, 5th, 6th, 7th, 8th and 9th decks in sequence, until all 9 decks are verified, and generate 9 EXCEL verification result files corresponding to each deck.

[0048] Results Verification and Optimization: After all nine decks were checked, the designers reviewed the EXCEL output results for each deck. For any non-compliant nodes (such as secondary beam node 4105 on deck 4 and equipment foundation node 7302 on deck 7), the structural dimensions of the corresponding components were optimized and adjusted based on the detailed data output by the program. After the adjustment, the program was restarted for verification until all nodes met the specifications, ensuring that the construction deformation of the nine decks met the design standards.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for automatically checking the deformation of a topside block construction of a marine converter station, characterized in that, Includes the following steps: Step S1: Establish a construction model of the upper module of the offshore converter station and store the node number and beam structure information. Apply construction load to the construction model and perform finite element calculation to obtain the deflection data of each node of the construction model. Associate the node number with the deflection data and store it. Step S2: Calculate the span of the corresponding beam structure based on the beam structure information; Step S3: Calculate the relative deformation gradient of the node based on the deflection data and the span; Step S4: Compare the calculated relative deformation gradient with the preset specification limit to complete the automatic verification of node deformation; The beam structure information includes beam type, beam element, and axis position; The calculation of the span of the corresponding beam structure in step S2 includes: using different span calculation methods according to the beam type, the beam type including main beam and secondary beam; each beam structure is discretized into at least one beam element, and each beam element has two nodes at both ends; if the two nodes of the beam element are located on the same axis, it is a main beam, otherwise it is a secondary beam. The beam structure information also includes the effective length of the main beam. The span calculation method for the main beam is as follows: if the effective length of the main beam is defined in the construction model, then the effective length is read as the span of the main beam; otherwise, the distance between the adjacent axes of the current node is used as the span. When the effective length is greater than the spacing between adjacent axes, search for adjacent main beams on the extension line of the main beam until the sum of the lengths of multiple main beam segments equals the effective length, and use the sum of the lengths of multiple main beam segments as the span. The method for calculating the span of the secondary beam is as follows: identify the orthogonal beams that are orthogonally connected to the current secondary beam, and take the distance between the two orthogonal beams as the span of the secondary beam; The beam type also includes equipment foundations. The span calculation method for the equipment foundation is as follows: search for the secondary beam nodes at the bottom of the equipment foundation based on the spatial location information of the equipment foundation, then search for the main beams connected to the secondary beam nodes based on the node numbers, and calculate the spacing between the main beams that have two orthogonal directions as the span of the equipment foundation. After step S2 and before step S3, the method further includes calculating the maximum relative deflection of the node: for a simply supported beam with two support points, the relative deflection of the node relative to the two support points is calculated based on the node deflection data, and the larger value is taken as the maximum relative deflection of the node; in step S3, the relative deformation gradient is calculated based on the maximum relative deflection and the span.

2. The method according to claim 1, wherein, It also includes a multi-layer deck cyclic verification step: starting from the bottom deck, steps S1 to S4 are performed sequentially on each deck. After the deformation verification of one deck is completed, it automatically moves to the next deck until all deck layers are verified.

3. The method according to claim 1, wherein the method is characterized by, It also includes a result output step: automatically outputting the verification results of each node to an EXCEL file. The verification results include node number, deflection, span, relative deformation gradient, and judgment information on whether the preset specification limits are met.

4. The method of claim 1, wherein the method further comprises: The preset standard limits are set according to the "Design Specification for Offshore Converter Stations of Wind Farm Projects". The deformation threshold for the main beam is 1 / 400, the deformation threshold for the secondary beam is 1 / 250, and the deformation threshold for the valve hall equipment foundation is 3 / 1000.

5. The method of claim 1, wherein the method further comprises: The construction loads mentioned in step S1 include at least wind loads, structural self-weight, and temporary construction loads.

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