Method, processor and storage medium for determining wind load of a tower crane

Abstract

The application relates to the technical field of engineering machinery, and discloses a method for determining wind load of a tower crane, a processor and a storage medium, a component model corresponding to a component to be measured of the tower crane is subjected to a wind tunnel test, so as to determine a wind tunnel aerodynamic coefficient of the component model, a CFD simulation model is established based on the component model, so as to realize more accurate calculation of the wind load of a complex large machine through the CFD simulation model, and the strain and application range of the wind load calculation are improved, and after the CFD aerodynamic coefficient of the component model is determined according to the CFD simulation model, the determination of a CFD simulation calculation correction coefficient is carried out according to the wind tunnel aerodynamic coefficient and the CFD aerodynamic coefficient, the aerodynamic coefficient obtained by the CFD simulation calculation with larger error is corrected by using the wind tunnel test closer to the actual situation, so that when the wind load of the tower crane is determined according to the CFD simulation calculation correction coefficient and the CFD aerodynamic coefficient, the CFD simulation calculation has higher accuracy.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and more specifically, to a method, processor, and storage medium for determining the wind load on a tower crane. Background Technology

[0002] Tower cranes, as tall pieces of machinery, are widely used in the construction of bridges, wind power projects, ports, and building sites. With the increasing demands for large-scale, modular, and intensive construction projects, the construction of extra-large bridges has placed new demands on tower cranes, including higher operating heights, heavier lifting capacities, and stronger wind resistance. Ultra-large tower cranes, with their complex and diverse structural forms, significantly increased overall height, and greatly extended booms, exhibit increasingly lower natural frequencies and greater sensitivity to wind loads. Therefore, researching the wind loads and calculation methods for tower cranes is of significant engineering practical importance for their structural safety design. Calculating wind load is the first step in the typhoon-resistant design process of tower cranes. Currently, the aerodynamic coefficient method adopted in the "Design Code for Tower Cranes" (GB / T 13752-2017) is still used when calculating the wind load of tower cranes. This method is simple, convenient and easy to calculate. However, the actual model of tower crane is relatively complex, and the standard formula only determines the aerodynamic coefficient for a simple model. The calculation of wind load of tower cranes requires the designer to determine the appropriate value based on the specific situation. If the value is too small, safety will be difficult to guarantee; if the value is too large, the amount of steel used and the self-weight will inevitably increase, and it will cause difficulties in transportation, assembly and disassembly, increase costs and reduce economic benefits.

[0003] Therefore, accurately describing and precisely calculating the wind load conditions of tower crane structural systems under different environments, thereby providing theoretical and practical guidance for the design and production of tower cranes, is of great significance to the economy and safety of tower cranes. Summary of the Invention

[0004] To address the aforementioned shortcomings in the prior art, the purpose of this invention is to provide a method, processor, and storage medium for determining the wind load on a tower crane.

[0005] To achieve the above objectives, a first aspect of the present invention provides a method for determining the wind load on a tower crane, comprising:

[0006] Wind tunnel tests were conducted on the component model corresponding to the component to be tested of the tower crane to determine the wind tunnel aerodynamic coefficient of the component model;

[0007] A computational fluid dynamics (CFD) simulation model was established based on the component model.

[0008] The CFD aerodynamic coefficients of the component model are determined based on the CFD simulation model.

[0009] The correction factor for CFD simulation calculation is determined based on the wind tunnel aerodynamic coefficient and the CFD aerodynamic coefficient.

[0010] The wind load on the tower crane is determined based on the correction factor calculated by CFD simulation and the CFD aerodynamic coefficient.

[0011] In this embodiment of the invention, a wind tunnel test is conducted on the component model corresponding to the component to be tested of the tower crane to determine the wind tunnel aerodynamic coefficients of the component model, including:

[0012] Wind tunnel tests were conducted on the component model corresponding to the component to be tested of the tower crane to determine the equivalent static wind load corresponding to the component model.

[0013] The wind tunnel aerodynamic coefficients corresponding to the component model are determined based on the equivalent static wind load.

[0014] In this embodiment of the invention, a CFD simulation model is established based on a component model, including:

[0015] Determine the corresponding geometric model of the component model in the wind tunnel test;

[0016] Obtain the calculated wind speed and wind profile when conducting wind tunnel tests on the component model;

[0017] A CFD simulation model is established based on geometric models, calculated wind speeds, and wind profiles.

[0018] In this embodiment of the invention, establishing a CFD simulation model based on a component model further includes:

[0019] Determine the dimensional information of the component model;

[0020] A CFD simulation model is built based on the dimensional information.

[0021] In this embodiment of the invention, the dimensional information includes the height, width, and length of the component model. A CFD simulation model is established based on the dimensional information, including:

[0022] The computational region of the external flow in the CFD simulation model is determined based on the size information of the component model. Specifically, the distance between the outlet boundary and the center of the component model in the computational region and the distance between the upper and lower boundaries of the computational region and the center of the component model are determined based on the height; the distance between the inlet boundary and the center of the component model in the computational region is determined based on the width; and the distance between the two side boundaries of the computational region and the end faces of the component model is determined based on the length.

[0023] In this embodiment of the invention, determining the CFD aerodynamic coefficients of the component model based on the CFD simulation model includes:

[0024] The CFD simulation mesh in the CFD simulation model uses a cut-body mesh, and the mesh corresponding to the wall area of ​​the component model is locally refined.

[0025] Obtain the flow characteristics around the external field of the CFD simulation model after local refinement, and perform CFD simulation solution based on the flow characteristics;

[0026] Post-simulation processing is performed based on the simulation results to determine the CFD aerodynamic coefficients of the component model.

[0027] In this embodiment of the invention, the correction coefficient for CFD simulation calculation is determined based on the wind tunnel aerodynamic coefficient and the CFD aerodynamic coefficient, including:

[0028] The test wind deflection angle range of the component model is determined based on the structural characteristics of the component model. The test wind deflection angle is used to adjust the wind direction conditions of the wind tunnel test and CFD simulation model.

[0029] Within the angular range, starting from the boundary value of the angular range, the wind deflection angle of the wind tunnel test and CFD simulation model is adjusted once at preset angle intervals.

[0030] Determine the initial wind tunnel aerodynamic coefficient and initial CFD aerodynamic coefficient for each test wind deflection angle;

[0031] The initial CFD simulation calculation correction coefficients are determined based on the initial wind tunnel aerodynamic coefficients and the initial CFD aerodynamic coefficients.

[0032] The average value of all initial CFD simulation correction coefficients within the angular range is used as the CFD simulation correction coefficient.

[0033] In this embodiment of the invention, it further includes:

[0034] Identify the preset replacement component to be tested that corresponds to the component under test;

[0035] Wind tunnel tests were conducted on the replacement component model corresponding to the preset replacement component to be tested in order to determine the second wind tunnel aerodynamic coefficient of the replacement component model.

[0036] A second CFD simulation model was established based on the replacement component model;

[0037] The second CFD aerodynamic coefficients of the replacement component model are determined based on the second CFD simulation model.

[0038] The target CFD aerodynamic coefficient is obtained by combining the second CFD aerodynamic coefficient with the correction coefficient calculated by CFD simulation.

[0039] The aerodynamic coefficients of the second wind tunnel were compared with those of the target CFD.

[0040] If the difference between the second wind tunnel aerodynamic coefficient and the target CFD aerodynamic coefficient does not exceed the preset error range, then the step of determining the wind load of the tower crane based on the correction coefficient calculated by CFD simulation and the CFD aerodynamic coefficient is executed.

[0041] In this embodiment of the invention, the wind load of the tower crane is determined based on the correction coefficient calculated by CFD simulation and the CFD aerodynamic coefficient, including:

[0042] Determine the feature area of ​​the component model corresponding to the CFD aerodynamic coefficient, and determine the calculation wind speed input to the CFD simulation model;

[0043] The wind load calculation formula in the tower crane design specification is optimized based on the CFD simulation calculation correction coefficient, calculated wind speed, CFD aerodynamic coefficient, and component model feature area.

[0044] The wind load of the component model is determined based on the optimized wind load calculation formula, and then the wind load of the tower crane is determined based on the wind load of the component model. The optimized wind load calculation formula is as follows:

[0045] P w1 =(1+μ)P w C CFD A

[0046] Among them, P w1 P represents the wind load on the component model. w P represents the calculated wind pressure. w =0.625v n 2 v n The calculated wind speed is represented by μ, which represents the correction factor for CFD simulation calculation, and C represents the calculated wind speed. CFD denoted by CFD aerodynamic coefficient, and A represents the feature area of ​​the component model.

[0047] In this embodiment of the invention, the wind load of the tower crane is determined based on the correction coefficient calculated by CFD simulation and the CFD aerodynamic coefficient, including:

[0048] If there are multiple components to be tested in a tower crane, then determine the component model corresponding to each component to be tested;

[0049] Determine the CFD aerodynamic coefficients corresponding to each component model;

[0050] The wind load of each component model is determined based on the correction coefficient calculated by CFD simulation and the CFD aerodynamic coefficients corresponding to each component model.

[0051] The wind load on the tower crane is determined by the sum of the wind loads of each component model.

[0052] In this embodiment of the invention, it further includes:

[0053] If there are multiple components to be tested in a tower crane, then determine the complete machine model corresponding to all components to be tested.

[0054] Wind tunnel tests were conducted on the complete machine model to determine the wind tunnel wind load corresponding to the complete machine model;

[0055] The correction coefficients for CFD simulation calculations were verified based on wind tunnel loads and wind loads from tower cranes.

[0056] In this embodiment of the invention, the correction coefficients for CFD simulation calculations are verified based on wind tunnel wind loads and tower crane wind loads, including:

[0057] Determine the actual tower crane wind load corresponding to the wind tunnel wind load;

[0058] Compare the actual wind load on the tower crane with the wind load on the tower crane.

[0059] If the difference between the actual wind load on the tower crane and the wind load on the tower crane is within the preset wind load error range, then the verification of the CFD simulation calculation correction coefficient is confirmed to be successful.

[0060] A second aspect of the present invention provides a processor configured to, when executing, implement the steps of the method described above for determining the wind load on a tower crane.

[0061] A third aspect of the present invention provides a storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps described above for determining the wind load on a tower crane.

[0062] The above technical solution involves conducting wind tunnel tests on the component model corresponding to the tower crane's test component to determine the wind tunnel aerodynamic coefficients of the component model. This provides an experimental basis for correcting the CFD aerodynamic coefficients. A CFD simulation model is then established based on the component model to more accurately calculate the wind load on large, complex machinery operating in challenging wind environments. This improves the susceptibility and applicability of wind load calculations. Furthermore, after determining the CFD aerodynamic coefficients of the component model based on the CFD simulation model, correction coefficients for CFD simulation calculations are determined based on both the wind tunnel aerodynamic coefficients and the CFD aerodynamic coefficients. This allows for the correction of aerodynamic coefficients obtained from CFD simulation calculations with significant errors using wind tunnel tests that more closely approximate actual conditions. Consequently, when determining the wind load on the tower crane based on the CFD simulation calculation correction coefficients and the CFD aerodynamic coefficients, the CFD simulation calculations achieve higher accuracy.

[0063] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0064] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0065] Figure 1 This is a flowchart illustrating the first embodiment of a method for determining wind load on a tower crane according to the present invention.

[0066] Figure 2 This is a reference schematic diagram of an application scenario model according to an embodiment of the present invention;

[0067] Figure 3 This is a schematic diagram of a wind tunnel test component model according to an embodiment of the present invention;

[0068] Figure 4 This is a schematic diagram of the aerodynamic coefficients of a wind tunnel under different wind speeds according to an embodiment of the present invention;

[0069] Figure 5 This is a schematic diagram of a CFD simulation model according to an embodiment of the present invention;

[0070] Figure 6 This is a schematic diagram showing the aerodynamic coefficients of an embodiment of the present invention. Detailed Implementation

[0071] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0072] This invention provides a method for determining the wind load on a tower crane, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of a method for determining wind load on a tower crane according to the present invention.

[0073] In this embodiment, the method for determining the wind load of a tower crane includes:

[0074] Step S100: Conduct wind tunnel tests on the component model corresponding to the component to be tested of the tower crane to determine the wind tunnel aerodynamic coefficient of the component model.

[0075] In this embodiment, it should be noted that the wind tunnel test utilizes a scaled-down model within a wind tunnel laboratory, employing a large wind turbine to simulate the actual atmospheric wind environment. This allows for mechanical model testing of the tower crane under various wind conditions, thereby obtaining data such as the tower crane's aerodynamic coefficients. Wind tunnel testing technology is widely used in aerospace, automotive, and architectural design fields, and is relatively mature. Using this method to measure the wind load on the tower crane structure will be closer to reality. The components of the tower crane under test include, but are not limited to, the jib, standard tower sections, counterweight boom, operator's cab, and other relevant parts of the tower crane. The wind tunnel aerodynamic coefficients include the aerodynamic coefficients of the components under test corresponding to the wind tunnel test. (Reference) Figure 2 Using the 12,000 t·m ultra-large tower crane boom developed by Zoomlion for the construction of ultra-large cable-stayed bridges as a prototype, a relatively systematic small-scale segmental model wind tunnel test was conducted in an industrial wind tunnel. The boom segments of the tower crane were manufactured according to a 1 / 75 geometric scale ratio, with a total of 3 segments, of which the middle segment is the force measurement segment.

[0076] Specifically, the component to be tested in the tower crane is identified, and a component model is determined based on this component. A small-scale segmental model wind tunnel test is then conducted in an industrial wind tunnel to obtain the wind tunnel aerodynamic coefficients.

[0077] Step S200: Establish a computational fluid dynamics (CFD) simulation model based on the component model;

[0078] In this embodiment, it should be noted that CFD (Computational Fluid Dynamics) based numerical simulation uses supercomputing to numerically solve the governing equations of fluid mechanics, thereby obtaining simulations and analyses of complex fluid mechanics problems. CFD-based numerical simulation can simulate relatively complex fluid motion processes and derive corresponding numerical results based on preset flow field parameters, exhibiting strong adaptability, wide applicability, and high reliability. Establishing the CFD simulation model based on the component model ensures that the geometric model used in the simulation calculations is consistent with the wind tunnel test model.

[0079] Specifically, a CFD simulation model of equal scale to the wind tunnel test is established, and 1:1 CFD simulation calculations are performed based on the component model of the wind tunnel test.

[0080] Step S300: Determine the CFD aerodynamic coefficients of the component model based on the CFD simulation model;

[0081] In this embodiment, it should be noted that the general structure of CFD software consists of three parts: preprocessing, solver, and post-processing. The preprocessing module includes geometric modeling and mesh generation; the solver module includes determining the governing equations of the CFD method, selecting a discretization method, choosing a numerical calculation method, and inputting relevant parameters; the post-processing module includes computer visualization and animation processing of the velocity field, temperature field, pressure field, and other parameters. CFD aerodynamic coefficients include the aerodynamic coefficients of the component under test corresponding to the CFD simulation calculation.

[0082] Specifically, after performing aerodynamic calculations using a professional fluid dynamics solver, the CFD simulation model undergoes post-processing to extract and convert information such as pressure and drag from the surfaces of tower crane components to obtain CFD aerodynamic coefficients. The professional fluid dynamics solvers used in CFD simulation include, but are not limited to, Fluent, OpenFOAM, and STAR-CCM+ (commercial CFD software).

[0083] Step S400: Determine the correction coefficients for CFD simulation calculations based on the wind tunnel aerodynamic coefficients and CFD aerodynamic coefficients;

[0084] In this embodiment, it should be noted that due to the complexity and difficulty in solving the governing equations of fluid mechanics, the mathematical model and boundary conditions of CFD simulation are difficult to determine accurately, resulting in certain errors in the CFD simulation results. In this embodiment, wind tunnel tests, which are closer to actual conditions, are used to correct the CFD aerodynamic coefficients obtained from the CFD simulation calculations, thus improving the accuracy of the CFD simulation calculations.

[0085] Specifically, the CFD aerodynamic coefficients are corrected using correction factors calculated through CFD simulation. These correction factors are determined by the wind tunnel aerodynamic coefficients and the CFD aerodynamic coefficients, and the formula for calculating the CFD simulation correction factors is as follows: Where μ represents the correction factor for CFD simulation calculation, C 风洞 C represents the wind tunnel aerodynamic coefficient. CFD This represents the CFD aerodynamic coefficient.

[0086] Step S500: Determine the wind load on the tower crane based on the correction coefficients calculated by CFD simulation and the CFD aerodynamic coefficients.

[0087] In this embodiment, it should be noted that the existing domestic and international standards and specifications that include the calculation of wind load for tower cranes are: GB / T13752-2017 "Code for Design of Tower Cranes", GB / T3811-2008 "Code for Design of Cranes", GB50009-2012 "Code for Design of Building Structures", and BS EN 13001-1:2015 "Cranes - General design". When using the above specifications for calculation, the method is simple, convenient and easy to calculate. However, due to the shortcomings of its simple calculation model, the different characteristics of the wind load coefficient C, and the unclear source and usage conditions of the wind load coefficient, its guiding significance for actual design is limited. It is not enough to accurately describe the stress situation of the entire tower crane under strong typhoons, and it is impossible to form an evaluation specification and standard for the typhoon resistance performance of tower cranes. In this embodiment, the CFD aerodynamic coefficient and the CFD simulation calculation correction coefficient are substituted into the above-mentioned standards and specifications to achieve the accuracy of the determination of the wind load coefficient, thereby obtaining the wind load of the tower crane.

[0088] In this embodiment of the invention, wind tunnel tests are conducted on the component model corresponding to the test component of the tower crane to determine the wind tunnel aerodynamic coefficient of the component model. This provides an experimental basis for correcting the CFD aerodynamic coefficient. A CFD simulation model is established based on the component model to more accurately calculate the wind load of large machinery with complex structures and complex wind environments. This improves the susceptibility and application range of wind load calculation. After determining the CFD aerodynamic coefficient of the component model based on the CFD simulation model, a correction coefficient for CFD simulation calculation is determined based on the wind tunnel aerodynamic coefficient and the CFD aerodynamic coefficient. This allows for the correction of the aerodynamic coefficient obtained from the CFD simulation calculation with large errors using wind tunnel tests that are closer to actual conditions. Thus, the wind load of the tower crane is determined based on the CFD simulation calculation correction coefficient and the CFD aerodynamic coefficient. By combining wind tunnel tests, standard specification calculations, and CFD simulation, a new structural wind load calculation method is provided, offering an algorithm that more closely matches the actual structural wind load to reduce wind load calculation errors and ensure the wind resistance performance of the tower crane under harsh working conditions and complex environments.

[0089] Furthermore, based on the first embodiment of the method for determining wind load on a tower crane according to the present invention, a second embodiment of the method for determining wind load on a tower crane according to the present invention is proposed. Step S100, which involves conducting a wind tunnel test on the component model corresponding to the component to be tested of the tower crane to determine the wind tunnel aerodynamic coefficient of the component model, includes:

[0090] Step a: Conduct wind tunnel tests on the component model corresponding to the component to be tested of the tower crane to determine the equivalent static wind load corresponding to the component model;

[0091] Step b: Determine the wind tunnel aerodynamic coefficients corresponding to the component model based on the equivalent static wind load.

[0092] In this embodiment, it should be noted that the equivalent static wind load refers to the expression of the dynamic effect of pulsating wind in a wind tunnel test in its equivalent static form. Taking the boom of a tower crane as the component under test as an example, the scaled-down wind tunnel test component model of the component under test can be referenced. Figure 3 When determining the aerodynamic coefficients in a wind tunnel, the equivalent static wind load on the component model is measured under uniform flow conditions or specific wind conditions using a high-frequency dynamic force balance test. In the body-axis coordinate system, the wind load acting vertically on the tower component model can be expressed as: , of which F H The equivalent static wind load is represented by ρ, where ρ represents air density; U represents the average incoming wind speed; C H (α0) represents the aerodynamic coefficient when the body axis deflection angle is α_0; B and L represent the height and width of the component model, respectively. Based on the above formula, when the equivalent static wind load of the component model is measured, the wind tunnel aerodynamic coefficient corresponding to that component model in the wind tunnel test can be obtained. The air density, average incoming wind speed, and the height and width of the component model can all be adjusted according to actual needs. The average incoming wind speed is the calculated wind speed, for example, 10 m / s or 15 m / s. (Reference) Figure 4 , Figure 4 This includes the values ​​of the wind tunnel aerodynamic coefficient C_H at different wind speeds within the wind deflection angle range of 0°-180°.

[0093] This embodiment determines the wind tunnel aerodynamic coefficient through wind tunnel testing, providing a reference basis close to the actual situation for subsequent correction of the CFD aerodynamic coefficient, so as to reduce the calculation error of wind load.

[0094] Furthermore, a CFD simulation model is established based on the component model, including:

[0095] Step c: Determine the corresponding geometric model of the component model in the wind tunnel test;

[0096] Step d: Obtain the calculated wind speed and wind profile when conducting wind tunnel tests on the component model;

[0097] Step e: Establish a CFD simulation model based on the geometric model, calculated wind speed, and wind profile.

[0098] In this embodiment, it should be noted that, in order to correct the CFD aerodynamic coefficients using wind tunnel testing, the CFD simulation model is established as a CFD simulation model of equal scale to the wind tunnel test. The geometric model corresponding to the component model measured in the wind tunnel test is determined, and then a scaled-down CFD simulation model corresponding to the component under test is established based on this geometric model. This can be referred to... Figure 5 The calculated wind speed and wind profile from the wind tunnel test are obtained, whereby the wind profile characterizes the trend of wind speed variation. A CFD simulation model is established based on the geometric model of the wind tunnel test, the calculated wind speed, and the wind profile to enable 1:1 CFD simulation calculations based on the component models from the wind tunnel test. Furthermore, in this embodiment, the SST kw turbulence model is preferably used for the CFD simulation calculations.

[0099] Furthermore, establishing a CFD simulation model based on the component model also includes:

[0100] Step f: Determine the dimensional information of the component model;

[0101] Step g: Establish a CFD simulation model based on the dimensional information.

[0102] Specifically, the dimensional information of the component model includes its height, width, and length. A CFD simulation model is then built based on this dimensional information, including:

[0103] Step g1: Determine the computational region of the external flow in the CFD simulation model based on the size information of the component model. Specifically, determine the distance between the outlet boundary and the center of the component model in the computational region and the distance between the upper and lower boundaries of the computational region and the center of the component model based on the height; determine the distance between the inlet boundary and the center of the component model in the computational region based on the width; and determine the distance between the two side boundaries of the computational region and the end faces of the component model based on the length.

[0104] In this embodiment, it should be noted that the CFD simulation model includes the outer surface of the component model and the air domain. The air domain represents the external flow. Considering the computer's hardware capabilities and to reduce the impact of boundaries on the external flow field of the tower crane component, the computational region of the external flow field must be sufficiently large. The computational region of the external flow field is determined by the relative positions of the outlet boundary, inlet boundary, upper and lower boundaries, side boundaries, and the component model. In this embodiment, the dimensions of the component model are used as the reference unit for setting the computational region of the external flow field. The distance between the outlet boundary and the center of the component model in the computational region, as well as the distance between the upper and lower boundaries and the center of the component model in the computational region, are determined based on the height of the component model; the distance between the inlet boundary and the center of the component model in the computational region is determined based on the width; and the distance between the side boundaries and the end faces of the component model in the computational region is determined based on the length.

[0105] In one application scenario, when setting the computational region of the external flow field, the inlet boundary is greater than 30D from the center of the component model, the two side boundaries are greater than 2L from the end faces of the component model, the outlet boundary is greater than 90B from the center of the component model, and the upper and lower boundaries are greater than 10B from the center of the component model. Here, B, D, and L represent the height, width, and length of the component model, respectively. It is understood that in practical applications, different ranges can be set for the computational region of the external flow field according to actual needs.

[0106] In this embodiment, when establishing the CFD simulation model, it is also necessary to set the physical property parameters and boundary conditions. The fluid is air at room temperature, with a uniform flow field inlet, and the wind field inlet is a velocity inlet, with the wind speed consistent with the wind tunnel test. The CFD boundary conditions include the values ​​of flow variables and thermal variables at the boundaries. Preferably, in this embodiment, the outlet boundary uses a 0-pressure boundary condition, the upper and lower surfaces use sliding walls, limiting the normal phase displacement to 0, and the left and right sides use symmetrical boundary conditions. The air is at room temperature.

[0107] Reference Table 1 shows the air physical properties parameters, with corresponding reference values ​​for ambient temperature, density, and viscosity.

[0108] Table 1 Air physical properties

[0109]

[0110] Furthermore, the CFD aerodynamic coefficients of the component model are determined based on the CFD simulation model, including:

[0111] Step h: The CFD simulation mesh in the CFD simulation model adopts a cut volume mesh, and the mesh corresponding to the wall area of ​​the component model is locally refined.

[0112] Step i: Obtain the flow characteristics of the external field flow in the CFD simulation model after local encryption, and perform CFD simulation solution based on the flow characteristics;

[0113] Step j involves performing post-simulation processing based on the simulation results to determine the CFD aerodynamic coefficients of the component model.

[0114] In this embodiment, it should be noted that after defining the geometric dimensions of the computational domain in the CFD simulation model, mesh generation is performed. The computational domain is divided into numerous smaller, non-overlapping sub-regions. These sub-regions are used to solve for the regional flow phenomena. Numerical solutions are then performed on each element mesh of the fluid to determine the discrete values ​​of velocity, pressure, temperature, and other transport variables. In this embodiment, the CFD simulation mesh uses a cut-volume mesh. The walls of the component model employ 3-10 boundary layers, and the mesh in the vicinity of the component model is locally refined to capture the flow characteristics around the external flow field. By using 3-10 boundary layers on the walls of the component model and locally refining the mesh in the vicinity of the component model, the ability to obtain detailed features is improved, thereby enhancing the accuracy of the CFD simulation. After obtaining the flow characteristics, CFD simulation solutions are performed based on these features. In this embodiment, the CFD simulation solution uses a professional fluid solver for aerodynamic calculations, including but not limited to Fluent, OpenFOAM, and STAR-CCM+. After the solver completes the calculation, post-simulation processing is performed. This involves extracting information such as pressure and resistance from the surface of the component model, and then applying the formula... After conversion, the CFD aerodynamic coefficients of tower crane components under different operating conditions can be obtained in CFD simulation. Among them, F... H1 The extracted component model's surface resistance is represented by ρ, air density by U, and average incoming wind speed by C. H (α0) represents the aerodynamic coefficient when the body axis deflection angle is α_0; B and L represent the height and width of the component model, respectively.

[0115] In this embodiment, by establishing a CFD simulation model and determining the CFD aerodynamic coefficients, the aerodynamic coefficients of complex ultra-large tower crane components can be calculated using CFD simulation, thereby improving the adaptability of wind load calculation for tower cranes and effectively expanding the application scope.

[0116] Furthermore, correction factors for CFD simulation calculations are determined based on wind tunnel aerodynamic coefficients and CFD aerodynamic coefficients, including:

[0117] Step k: Determine the range of the test wind deflection angle of the component model based on the structural characteristics of the component model. The test wind deflection angle is used to adjust the wind direction conditions of the wind tunnel test and CFD simulation model.

[0118] Step 1: Within the angle range, starting from the boundary value of the angle range, adjust the wind deflection angle of the wind tunnel test and CFD simulation model at preset angle intervals.

[0119] Step m: Determine the initial wind tunnel aerodynamic coefficient and the initial CFD aerodynamic coefficient corresponding to each test wind deflection angle;

[0120] Step n: Determine the initial CFD simulation calculation correction coefficients based on the initial wind tunnel aerodynamic coefficients and the initial CFD aerodynamic coefficients;

[0121] Step o: Take the average value of all initial CFD simulation calculation correction coefficients within the angle range as the CFD simulation calculation correction coefficient.

[0122] In this embodiment, it should be noted that multiple tests are conducted under different operating conditions during wind tunnel testing and CFD simulation model calculations to reduce errors. These different operating conditions can be varied by different wind speeds, wind profiles, wind deflection angles, and other specific wind conditions. In this embodiment, different operating conditions are tested by changing the wind deflection angle. It is understood that in another embodiment, tests under different operating conditions can also be conducted based on other specific wind conditions such as wind speed and wind profile. When setting the range of different wind deflection angles, the angle range can be determined based on the structural characteristics of the component model. For symmetrical component models, to reduce workload, the angle range of the test wind deflection angle can be set to 0°-180°. For asymmetrical component models, to improve the effectiveness of the test, the angle range of the test wind deflection angle needs to be set to 0°-360°. The boundary values ​​of the angle range are the maximum and minimum values ​​within the angle range. For example, when the angle range is 0°-180°, the boundary values ​​are 0° and 180°. When determining the test wind deflection angle, different test wind deflection angles can be set from 0° to 180° or from 180° to 0° to simulate different operating conditions. The preset angle is used to determine the test wind deflection angle used for setting operating conditions within the test wind deflection angle range. For example, in wind tunnel testing, when the preset angle is 5°, starting from 0°, the wind tunnel aerodynamic coefficient is determined every 5° interval, such as wind deflection angles of 5°, 10°, and 15°.

[0123] refer to Figure 6 ,exist Figure 6 The system includes CFD simulation models and wind tunnel test values ​​corresponding to CFD aerodynamic coefficients and wind tunnel aerodynamic coefficients at different wind deflection angles. When determining the CFD simulation calculation correction coefficients based on the wind tunnel aerodynamic coefficients and CFD aerodynamic coefficients under different operating conditions, multiple CFD simulation calculation correction coefficients can be obtained. These correction coefficients under different operating conditions are used as initial CFD simulation calculation correction coefficients. After determining all initial CFD simulation calculation correction coefficients within the angle range corresponding to the test wind deflection angle, the average value of all initial CFD simulation calculation correction coefficients is calculated, and this average value is used as the CFD simulation calculation correction coefficient. It is understood that, in one embodiment, a more conservative value, such as the maximum value, among all initial CFD simulation calculation correction coefficients can be determined as the CFD simulation calculation correction coefficient.

[0124] In this embodiment, different test wind deflection angles are used to simulate different working conditions to obtain initial CFD simulation calculation correction coefficients under different working conditions. The final CFD simulation calculation correction coefficients are determined based on the initial CFD simulation calculation correction coefficients under different working conditions, thereby improving the effectiveness of the CFD simulation calculation correction coefficients and ensuring the accuracy of CFD simulation calculations.

[0125] Furthermore, embodiments of the present invention also include:

[0126] Step p1: Determine the preset replacement component to be tested corresponding to the component to be tested;

[0127] Step p2: Conduct wind tunnel tests on the replacement component model corresponding to the preset replacement component to be tested to determine the second wind tunnel aerodynamic coefficient of the replacement component model;

[0128] Step p3: Establish a second CFD simulation model based on the replacement component model;

[0129] Step p4: Determine the second CFD aerodynamic coefficients of the replacement component model based on the second CFD simulation model;

[0130] Step p5: Combine the second CFD aerodynamic coefficient with the CFD simulation calculation correction coefficient to obtain the target CFD aerodynamic coefficient.

[0131] Step p6 compares the aerodynamic coefficients of the second wind tunnel with those of the target CFD;

[0132] Step p7: If the difference between the second wind tunnel aerodynamic coefficient and the target CFD aerodynamic coefficient does not exceed the preset error range, then proceed to the step of determining the wind load of the tower crane based on the correction coefficient calculated by CFD simulation and the CFD aerodynamic coefficient.

[0133] In this embodiment, it should be noted that before performing the step of determining the wind load of the tower crane based on the correction coefficients calculated by CFD simulation and the CFD aerodynamic coefficients, the correction coefficients calculated by CFD simulation will be preliminarily verified. Only after the verification is successful will the step of determining the wind load of the tower crane based on the correction coefficients calculated by CFD simulation and the CFD aerodynamic coefficients be performed. It is understood that in another embodiment, this verification step may be omitted.

[0134] The verification process includes wind tunnel testing and CFD simulation calculations using different components under test (DUTs). The wind tunnel aerodynamic coefficients of these different DUTs are determined as second wind tunnel aerodynamic coefficients. A second CFD simulation model is built based on the corresponding component model of each different DUT. The CFD simulation aerodynamic coefficients obtained from these second CFD simulation models are then used as second CFD aerodynamic coefficients. These second CFD aerodynamic coefficients are combined with a CFD simulation calculation correction factor to obtain a target CFD aerodynamic coefficient. The second wind tunnel aerodynamic coefficient, which approximates the actual situation, is then compared with the target CFD aerodynamic coefficient to determine if the difference exceeds a pre-set error range. If the difference does not exceed the pre-set error range, the CFD simulation calculation correction factor is considered relatively accurate, and the wind load on the tower crane can be determined based on this correction factor. If the difference exceeds the pre-set error range, the CFD simulation calculation correction factor has a large error and needs to be recalculated. In this embodiment, different test components are preset replacement test components. The preset replacement test components can be parts similar to the test components in different tower cranes, or other parts in the tower crane corresponding to the test component. The structural differences between components can be ignored when determining the correction coefficients for CFD simulation calculation.

[0135] In this embodiment, the correction coefficients for CFD simulation calculations are initially verified, which improves the effectiveness of the correction coefficients for CFD simulation calculations and thus ensures the accuracy of CFD simulation calculations.

[0136] Furthermore, the wind load on the tower crane is determined based on the correction factors calculated by CFD simulation and the CFD aerodynamic coefficients, including:

[0137] Step q1: Determine the feature area of ​​the component model corresponding to the CFD aerodynamic coefficient, and determine the calculation wind speed input to the CFD simulation model;

[0138] Step q2: Optimize the wind load calculation formula in the tower crane design specification based on the CFD simulation calculation correction coefficient, calculated wind speed, CFD aerodynamic coefficient, and component model feature area;

[0139] Step q3: Determine the wind load of the component model based on the optimized wind load calculation formula, and then determine the wind load of the tower crane based on the wind load of the component model. The optimized wind load calculation formula is as follows:

[0140] P w1 =(1+μ)P w C CFD A

[0141] Among them, P w1P represents the wind load on the component model. w P represents the calculated wind pressure. w =0.625v n 2 v n The calculated wind speed is represented by μ, which represents the correction factor for CFD simulation calculation, and C represents the calculated wind speed. CFD denoted by CFD aerodynamic coefficient, and A represents the feature area of ​​the component model.

[0142] In this embodiment, CFD aerodynamic coefficients and CFD simulation correction coefficients are substituted into the standard specifications to ensure the accuracy of wind load coefficient determination, thereby deriving the wind load of the tower crane. The component model feature area includes the actual area and the outline area of ​​the component model. When determining the CFD aerodynamic coefficients, it can be determined whether to use the actual area or the outline area according to actual needs.

[0143] Specifically, the calculation formula for verifying the tower crane structure in formula (10) of the working state wind load calculation formula in GB / T13752-2017 "Code for Design of Tower Cranes": P w1 =P w CA, where P w1 P represents the wind load acting vertically on the tower crane components when verifying the tower crane structure. w P represents the calculated wind pressure. w =0.625v n 2 v n Let P represent the calculated wind speed, C represent the aerodynamic coefficient of the component, and A represent the characteristic area of ​​the component. After optimization, the optimized wind load calculation formula is P. w1 =(1+μ)P w C CFD A, where P w1 P represents the wind load on the component under test. w P represents the calculated wind pressure. w =0.625v n 2 v n The calculated wind speed is represented by μ, which represents the correction factor for CFD simulation calculation, and C represents the calculated wind speed. CFD The coefficient of performance (CFD) is represented by A, and the feature area of ​​the component model is represented by A. It is understood that in practical applications, the CFD aerodynamic coefficient and the correction coefficient from the CFD simulation calculation can be substituted into other standards and specifications for adaptive adjustments; this will not be elaborated upon here. The component model is a scaled-down version of the actual component under test. After determining the wind load of the component model based on the optimized wind load calculation formula, the wind load of the tower crane needs to be calculated based on the wind load of the obtained component model according to this scaled-down version.

[0144] In this embodiment, a new structural wind load calculation method is proposed that combines wind tunnel testing, standard specification calculation, and CFD simulation. This method provides an algorithm that more closely matches the actual structural wind load to reduce wind load calculation errors and ensure the wind resistance performance of tower cranes under harsh working conditions and complex environments.

[0145] Furthermore, the steps for determining the wind load on the tower crane based on the correction factors calculated by CFD simulation and the CFD aerodynamic coefficients include:

[0146] Step r1: If there are multiple components to be tested in the tower crane, determine the component model corresponding to each component to be tested.

[0147] Step r2: Determine the CFD aerodynamic coefficients corresponding to each component model;

[0148] Step r3: Determine the wind load of each component model based on the correction coefficients calculated by CFD simulation and the corresponding CFD aerodynamic coefficients of each component model.

[0149] Step r4: Determine the wind load of the tower crane based on the sum of the wind loads of each component model.

[0150] In this embodiment, it should be noted that when performing wind load calculations on tower cranes, especially complex ultra-large tower cranes, CFD simulations are usually performed on the components of the tower crane. Therefore, when performing wind load calculations on the components of the tower crane, the wind loads of all the components need to be summed to obtain the wind load of the entire tower crane in the CFD simulation model. After obtaining the wind load of the entire tower crane in the CFD simulation model, the wind load of the actual tower crane needs to be extrapolated according to the ratio between the component to be tested and the component model to obtain the final wind load of the tower crane.

[0151] Specifically, when there are multiple components to be tested in a tower crane, the CFD aerodynamic coefficient corresponding to each component is determined separately. For each component, the CFD simulation calculation correction coefficient is combined with the corresponding CFD aerodynamic coefficient to obtain the wind load of each component. Finally, the wind loads corresponding to all components to be tested in the tower crane are added together to obtain the wind load of the tower crane.

[0152] In this embodiment, the disassembled components applicable to tower cranes can flexibly handle wind load calculations for complex tower crane structures, thereby improving the applicability of wind load calculations.

[0153] Furthermore, embodiments of the present invention also include:

[0154] Step s: If there are multiple components to be tested in a tower crane, then determine the complete machine model corresponding to all components to be tested.

[0155] Step t: Conduct wind tunnel tests on the complete machine model to determine the wind tunnel wind load corresponding to the complete machine model;

[0156] Step u verifies the correction coefficients for CFD simulation calculations based on wind tunnel wind loads and tower crane wind loads.

[0157] Specifically, step u, verifying the correction coefficients for CFD simulation calculations based on wind tunnel wind loads and tower crane wind loads, includes:

[0158] Step u1: Determine the actual tower crane wind load corresponding to the wind tunnel wind load;

[0159] Step u2: Compare the actual wind load on the tower crane with the wind load on the tower crane.

[0160] Step u3: If the difference between the actual wind load on the tower crane and the wind load on the tower crane is within the preset wind load error range, then the verification of the CFD simulation calculation correction coefficient is confirmed to be successful.

[0161] In this embodiment, it should be noted that when calculating the wind load for the components of the tower crane, to reduce errors and ensure the effectiveness of the CFD simulation calculation correction coefficient, the CFD simulation calculation correction coefficient will be verified. In this embodiment, the CFD simulation calculation correction coefficient is verified using a complete model from a wind tunnel test. Specifically, when there are multiple components to be tested on the tower crane, a complete model corresponding to the combination of these components is determined. A wind tunnel test is conducted on this complete model to obtain the corresponding wind load, which is used as the wind tunnel wind load. During the wind tunnel test, the tower crane is scaled down proportionally to obtain the complete model. The resulting wind tunnel wind load is the wind load of the tower crane corresponding to the complete model in the wind tunnel test. Therefore, the wind tunnel wind load is converted according to the scaled-down proportion to obtain the actual wind load of the tower crane. The wind load of the tower crane corresponding to the CFD simulation model is obtained, and the wind load of the tower crane is compared with the actual wind load of the tower crane corresponding to the wind tunnel test to determine the difference between the two. The system determines whether the difference is within the preset wind load error range. If the difference is within the preset wind load error range, the CFD simulation calculation correction coefficient is verified as passed; if the difference is not within the preset wind load error range, the CFD simulation calculation correction coefficient is determined to be inaccurate and needs to be re-determined. The preset wind load error range can be specifically determined according to actual needs and is not limited here. In one embodiment, the wind load corresponding to the component model obtained from the CFD model can be directly compared with the wind tunnel wind load without first performing a proportional conversion between the actual tower crane and the model.

[0162] In this embodiment, wind tunnel testing is used to verify the whole model of the tower crane, ensuring the accuracy of the correction coefficients in the CFD simulation calculation, and further ensuring the accuracy of the wind load calculation for the tower crane.

[0163] Furthermore, the present invention also provides a processor configured to execute the tower crane wind load determination method according to various embodiments of the present invention.

[0164] Furthermore, the present invention also provides a storage medium, including a computer-readable storage medium. The storage medium stores instructions that, when executed by a processor, cause the processor to perform the tower crane wind load determination method according to the above embodiments.

[0165] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0166] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0167] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0168] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0169] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0170] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0171] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0172] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0173] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0174] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention. Furthermore, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not further describe the various possible combinations.

[0175] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A method for determining the wind load on a tower crane, characterized in that, include: A wind tunnel test was conducted on the component model corresponding to the component to be tested of the tower crane to determine the wind tunnel aerodynamic coefficient of the component model; A computational fluid dynamics (CFD) simulation model is established based on the component model; The CFD aerodynamic coefficients of the component model are determined based on the CFD simulation model. The correction coefficients for CFD simulation calculations are determined based on the wind tunnel aerodynamic coefficients and the CFD aerodynamic coefficients. The wind load on the tower crane is determined based on the correction coefficient calculated by the CFD simulation and the CFD aerodynamic coefficient. The step of determining the CFD simulation calculation correction coefficient based on the wind tunnel aerodynamic coefficient and the CFD aerodynamic coefficient includes: The test wind deflection angle range of the component model is determined based on the structural characteristics of the component model, wherein the test wind deflection angle is used to adjust the wind direction conditions of the wind tunnel test and CFD simulation model; Within the stated angle range, starting from the boundary value of the stated angle range, the wind deflection angle of the wind tunnel test and CFD simulation model is adjusted once at preset angle intervals. Determine the initial wind tunnel aerodynamic coefficient and initial CFD aerodynamic coefficient corresponding to each of the test wind deflection angles; The initial CFD simulation calculation correction coefficients are determined based on the initial wind tunnel aerodynamic coefficients and the initial CFD aerodynamic coefficients. The average value of all initial CFD simulation correction coefficients corresponding to the angle range is used as the CFD simulation correction coefficient.

2. The method according to claim 1, characterized in that, The wind tunnel test of the component model corresponding to the component to be tested of the tower crane to determine the wind tunnel aerodynamic coefficient of the component model includes: A wind tunnel test was conducted on the component model corresponding to the component to be tested of the tower crane to determine the equivalent static wind load corresponding to the component model. The wind tunnel aerodynamic coefficient corresponding to the component model is determined based on the equivalent static wind load.

3. The method according to claim 1, characterized in that, The establishment of a CFD simulation model based on the component model includes: Determine the corresponding geometric model of the component model in the wind tunnel test; Obtain the calculated wind speed and wind profile when conducting wind tunnel tests on the component model; A CFD simulation model is established based on the geometric model, the calculated wind speed, and the wind profile.

4. The method according to claim 3, characterized in that, The step of establishing a CFD simulation model based on the component model also includes: Determine the dimensional information of the component model; A CFD simulation model is established based on the stated dimensional information.

5. The method according to claim 4, characterized in that, The dimensional information includes the height, width, and length of the component model. The step of establishing a CFD simulation model based on the dimensional information includes: The computational region of the external flow in the CFD simulation model is determined based on the size information of the component model. Specifically, the distance between the outlet boundary and the center of the component model in the computational region and the distance between the upper and lower boundaries of the computational region and the center of the component model are determined based on the height; the distance between the inlet boundary and the center of the component model in the computational region is determined based on the width; and the distance between the two side boundaries of the computational region and the end faces of the component model is determined based on the length.

6. The method according to claim 1, characterized in that, The step of determining the CFD aerodynamic coefficients of the component model based on the CFD simulation model includes: The CFD simulation mesh in the CFD simulation model adopts a cut volume mesh, and the mesh corresponding to the wall area of ​​the component model is locally refined. Obtain the flow characteristics around the external field of the CFD simulation model after local encryption, and perform CFD simulation solution based on the flow characteristics; The simulation results are used for post-simulation processing to determine the CFD aerodynamic coefficients of the component model.

7. The method according to claim 1, characterized in that, Also includes: Determine the preset replacement component to be tested corresponding to the component to be tested; A wind tunnel test was conducted on the replacement component model corresponding to the preset replacement component to be tested, so as to determine the second wind tunnel aerodynamic coefficient of the replacement component model; A second CFD simulation model is established based on the replacement component model; The second CFD aerodynamic coefficient of the replacement component model is determined based on the second CFD simulation model. The target CFD aerodynamic coefficient is obtained by combining the second CFD aerodynamic coefficient with the CFD simulation calculation correction coefficient. The aerodynamic coefficient of the second wind tunnel is compared with the aerodynamic coefficient of the target CFD; If the difference between the second wind tunnel aerodynamic coefficient and the target CFD aerodynamic coefficient does not exceed the preset error range, then the step of determining the wind load of the tower crane based on the correction coefficient calculated by the CFD simulation and the CFD aerodynamic coefficient is executed.

8. The method according to claim 1, characterized in that, The determination of the wind load on the tower crane based on the correction coefficient calculated by the CFD simulation and the CFD aerodynamic coefficient includes: Determine the feature area of ​​the component model corresponding to the CFD aerodynamic coefficient, and determine the calculated wind speed input to the CFD simulation model; The wind load calculation formula in the tower crane design specification is optimized based on the CFD simulation calculation correction coefficient, the calculated wind speed, the CFD aerodynamic coefficient, and the feature area of ​​the component model. The wind load of the component model is determined based on the optimized wind load calculation formula, and the wind load of the tower crane is determined based on the wind load of the component model. The optimized wind load calculation formula is as follows: in, This represents the wind load on the component model. This indicates the calculation of wind pressure. , This indicates the calculation of wind speed. This represents the correction factor calculated in the CFD simulation. Indicates the CFD aerodynamic coefficient. This represents the feature area of ​​the component model.

9. The method according to claim 1, characterized in that, The determination of the wind load on the tower crane based on the correction coefficient calculated by the CFD simulation and the CFD aerodynamic coefficient includes: If there are multiple components to be tested in the tower crane, then the component model corresponding to each component to be tested is determined. Determine the CFD aerodynamic coefficients corresponding to each component model; The wind load of each component model is determined based on the correction coefficient calculated by the CFD simulation and the CFD aerodynamic coefficient corresponding to each component model. The wind load of the tower crane is determined based on the sum of the wind loads of each component model.

10. The method according to claim 1, characterized in that, Also includes: If there are multiple components to be tested in a tower crane, then determine the complete machine model corresponding to all components to be tested. A wind tunnel test was conducted on the complete machine model to determine the wind tunnel wind load corresponding to the complete machine model; The correction coefficients for CFD simulation calculations were verified based on the wind load in the wind tunnel and the wind load on the tower crane.

11. The method according to claim 10, characterized in that, The verification of the correction coefficients for CFD simulation calculations based on the wind tunnel wind load and the wind load of the tower crane includes: Determine the actual tower crane wind load corresponding to the wind tunnel wind load; Compare the actual wind load on the tower crane with the wind load on the tower crane. If the difference between the actual wind load on the tower crane and the wind load on the tower crane is within the preset wind load error range, then the verification of the CFD simulation calculation correction coefficient is confirmed to be successful.

12. A processor, characterized in that, It is configured to perform the method for determining the wind load of a tower crane as described in any one of claims 1 to 11.

13. A storage medium storing instructions, characterized in that, When executed by a processor, the instructions cause the processor to perform a method for determining the wind load of a tower crane according to any one of claims 1 to 11.

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