Internal support column design method, system and medium based on finite element simulation software

Abstract

The present invention discloses an internal support column design method, system and medium based on finite element simulation software; it relates to the technical field of architectural design; this scheme improves the design method based on traditional finite element simulation software, obtains the optimal internal support column structure model by considering the economic and bearing capacity performance through a first finite element simulation analysis, obtains the optimal layout strategy by considering the economic and structural performance through a second finite element simulation analysis, and arranges the internal support columns in the wind tunnel test flow channel according to the optimal layout strategy, thereby reducing the roof span and optimizing the economy while ensuring that the wind tunnel airflow quality is not affected, providing a reference scheme for similar projects.

Description

Technical Field

[0001] The invention relates to the technical field of building design, and in particular to an internal support column design method, system and medium based on finite element simulation software. Background Art

[0002] Wind tunnels are important ground simulation equipment used to analyze the aerodynamic characteristics of aerospace vehicles. They are also indispensable test equipment for the development of various aircraft. The successful development of each new aircraft requires hundreds or thousands of wind tunnel tests. All aircraft currently manufactured have been tested in wind tunnels. Wind tunnel design is a comprehensive and pioneering project that requires exploration, demonstration, and research on the feasibility, rationality, and economy of various technical paths, technical solutions, and technical indicators.

[0003] At present, there are few large-scale wind tunnel cases and little experience to learn from and refer to regarding the current research status of wind tunnels. Due to the extremely complex design conditions of large-scale wind tunnels, as well as the characteristics of being extremely long, spacious, large-span and special-shaped, the amount of steel used is huge, especially at the corners, the roof grid needs to be designed with a larger span to ensure the stability of the structure and not affect the wind tunnel; in structural design, the larger the span, the more steel is used, and the higher the economic cost required to achieve the span; the traditional wind tunnel cases are directly applied to the research of large-scale wind tunnels, which has the problems of high cost and unstable structure. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the design conditions of large wind tunnels are extremely complex, and they are also characterized by being extra long, spacious, large span and irregular in shape. The traditional wind tunnel cases directly applied to the research of large wind tunnels have the problems of high cost and unstable structure due to the large amount of steel used. The purpose of the present invention is to provide an internal support column design method, system and medium based on finite element simulation software. In view of the extremely complex design conditions of large wind tunnels, and the characteristics of being extra long, spacious, large span and irregular in shape, an internal support column design method based on finite element simulation software is provided. This scheme improves the design method on the basis of traditional finite element simulation software. The optimal internal support column structure model is obtained by considering the economy, bearing capacity performance and aerodynamic performance through the first finite element simulation analysis. The optimal layout strategy is obtained by considering the overall economy and overall structural performance through the second finite element simulation analysis. By arranging internal support columns in the wind tunnel test flow channel according to the optimal layout strategy, the span of the small roof can be reduced and its economy can be optimized under the premise of ensuring that the airflow quality of the wind tunnel is not affected, so as to provide a reference scheme for similar projects.

[0005] The present invention is achieved through the following technical solutions:

[0006] This embodiment provides a method for designing an internal support column based on finite element simulation software, which is used for a wind tunnel test flow channel that withstands ultra-large wind pressure and ultra-high low turbulence, wherein the ultra-large wind pressure and ultra-high low turbulence means that the internal airflow pressure difference is much greater than the external wind load of the structure, and the ultra-high is equal to or greater than 50m; the method comprises:

[0007] Constructing a wind tunnel test flow channel model and a plurality of internal support column basic models with different structures; the internal support column is a circular tube structure or a lattice structure;

[0008] Based on the span of the wind tunnel test channel in the direction perpendicular to the channel and the same maximum stress ratio limit, the total steel consumption analysis is carried out to determine the layout section of the internal support column in the wind tunnel test channel;

[0009] After matching parameters of each internal support column foundation model, the foundation model is arranged in the layout section, the structure of the internal support column foundation model is adjusted, and a first finite element simulation analysis is performed to obtain an optimal internal support column structure model; the first finite element simulation analysis includes: flow field numerical analysis, ultimate bearing capacity analysis and steel consumption analysis;

[0010] The optimal internal support column structure model is set in the layout section, the number and layout position of the optimal internal support column structure model are adjusted, and a second finite element simulation analysis is performed to obtain an optimal layout strategy; the second finite element simulation analysis includes a total steel consumption analysis and a structural overall performance analysis;

[0011] Internal support columns are set in the wind tunnel test flow channel according to the optimal layout strategy.

[0012] Working principle of this scheme: the design conditions of large wind tunnels are extremely complex, and they are also characterized by being extra long, spacious, large span and special-shaped; the traditional wind tunnel cases directly applied to the research of large wind tunnels have the problems of high cost and unstable structure due to the large amount of steel used. The purpose of the present invention is to provide an internal support column design method, system and medium based on finite element simulation software. In view of the extremely complex design conditions of large wind tunnels, and the characteristics of being extra long, spacious, large span and special-shaped, an internal support column design method based on finite element simulation software is provided. This scheme improves the design method on the basis of traditional finite element simulation software, and obtains the optimal internal support column structural model by taking into account the economic and bearing capacity performance through the first finite element simulation analysis, and obtains the optimal layout strategy by taking into account the economic and structural performance through the second finite element simulation analysis. By arranging internal support columns in the wind tunnel test flow channel according to the optimal layout strategy, the span of the wind tunnel roof can be reduced and its economy can be optimized while ensuring that the airflow quality of the wind tunnel is not affected, providing a reference scheme for similar projects.

[0013] A further optimized solution is that the internal support columns include: round tube columns, lattice slot columns, lattice shuttle columns, lattice box columns and lattice thick plate columns;

[0014] The limb cross-section of the lattice-type slotted column is slot-shaped or I-shaped;

[0015] The limb cross-section of the lattice-type shuttle-shaped column is shuttle-shaped;

[0016] The limb cross-section of the lattice box column is box-shaped, stiffening ribs are arranged inside the lattice box column, and two adjacent lattice box columns are connected by a plurality of support rods and oblique supports;

[0017] The limbs of the lattice thick plate column are steel plates, and adjacent steel plates are connected by steel partitions.

[0018] A further optimization scheme is that the total steel consumption analysis is performed based on the span of the wind tunnel test flow channel in the direction perpendicular to the flow channel and the same maximum stress ratio limit value, so as to determine the arrangement section of the internal support column in the wind tunnel test flow channel; including the method:

[0019] Obtain the span value of the wind tunnel test flow channel in the direction perpendicular to the flow channel;

[0020] A span threshold is set in advance, and sections whose span values ​​continuously exceed the span threshold are selected from the wind tunnel test flow channel as long-span sections;

[0021] The internal support column foundation model of any structure is parameterized, and the parameterized internal support column foundation model is set in the long-span section model according to the internal column arrangement principle. The total steel consumption Q1 of the long-span section model and the internal support column foundation model is calculated under the condition of the same maximum stress ratio limit value;

[0022] Obtain the total steel consumption Q2 of the long-span section model when the internal support column foundation model is not set;

[0023] When Q1-Q2≥△Q, △Q is the rigidity change threshold, and the current large-span section is determined to be the layout section of the internal support columns.

[0024] A further optimization scheme is that the adjusting the structure of the internal support column basic model includes the following methods: adjusting the structure of the internal support column basic model, adjusting the configuration of the internal support column basic model under the same structure, and adjusting the variables of the internal support column basic model under the same structure and configuration;

[0025] The configurations of the lattice-type slotted column include: a cross-sectional double-limb configuration, a cross-sectional three-limb configuration and a cross-sectional four-limb configuration; wherein adjacent limbs are connected by a plurality of tie bars, wherein the variables of the cross-sectional double-limb configuration and the cross-sectional three-limb configuration both include: limb cross-sectional size, limb spacing, tie bar size and tie bar spacing;

[0026] The configuration of the lattice-type shuttle column includes configurations with different numbers of limbs, wherein the variables of the configurations with different numbers of limbs include: limb cross-sectional dimensions, limb spacing, tie bar dimensions, and tie bar spacing;

[0027] The configuration of the lattice box column includes a two-limb cross-section configuration, wherein the variables of the two-limb cross-section configuration include: cross-sectional dimensions of the limbs, spacing between the limbs, number and thickness of stiffening ribs, dimensions of support rods, and spacing between supports;

[0028] The configuration of the lattice-type thick plate column includes a two-limb cross-sectional configuration, and the variables of the two-limb cross-sectional configuration include: the thickness of the limb steel plates, the limb spacing, and the thickness and spacing of the steel partitions.

[0029] A further optimization scheme is that the first finite element simulation analysis includes the following method:

[0030] Obtain the basic model of the internal support column after parameter matching;

[0031] The analysis and calculation model of each internal support column foundation model is established based on Fluent software: steady-state calculation is performed based on the k-epsilon turbulence model to obtain the cross-sectional velocity distribution, cross-sectional noise distribution and drag coefficient of each internal support column foundation model; finite element elastic-plastic analysis is performed based on the shell unit model and the first-order elastic buckling mode of the internal column to obtain the bearing capacity and steel consumption of each internal support column foundation model.

[0032] A further optimization scheme is that the method for obtaining the optimal internal support column structure model includes:

[0033] Obtaining performance parameters of each internal support column foundation model, the performance parameters including: cross-sectional velocity distribution, cross-sectional noise distribution, resistance coefficient X, bearing capacity Y and steel consumption Qc;

[0034] Eliminate variable configurations of each internal support column foundation model according to single or multiple performance parameters;

[0035] According to the cross-sectional velocity distribution and cross-sectional noise distribution, the influence factor M of each internal support column foundation model on the flow field is obtained;

[0036] The first analysis index D1 is calculated by presetting weights for the influencing factor M, resistance coefficient X, bearing capacity Y and steel consumption Qc:

[0037] ;

[0038] Among them, a represents the weight of the influencing factor; b represents the weight of the resistance coefficient; c represents the weight of the bearing capacity; b represents the weight of the steel consumption;

[0039] The internal support column basic model with the largest first index is taken as the optimal internal support column structure model.

[0040] A further optimization scheme is to eliminate variables from the basic model of each internal support column according to single or multiple performance parameters; including the method:

[0041] For the lattice-type trough column foundation model, the steel consumption of the lattice-type trough column foundation models with different variables and different configurations is directly calculated, and the lattice-type trough column foundation model with the smallest steel consumption is retained;

[0042] For the lattice shuttle column foundation model, the simulated buckling modes and buckling eigenvalues ​​of different variables are obtained. Based on the buckling eigenvalue, initial defects are applied to the two-axis directions of the lattice shuttle column foundation model for double nonlinear analysis to obtain the smaller value of the two-axis buckling bearing capacity; the lattice shuttle column foundation model that meets the ultimate bearing capacity requirements is screened out, and the lattice shuttle column foundation model with the smallest steel consumption is retained;

[0043] For the lattice box column foundation model, the simulated buckling modes and buckling eigenvalues ​​of different variables are obtained. Based on the instability mode, the initial defects are applied to the lattice box column foundation model for double nonlinear analysis. The lattice box column foundation model with the minimum steel consumption is retained while meeting the ultimate bearing capacity requirements.

[0044] For the lattice thick plate column foundation model, the simulated buckling modes and buckling eigenvalues ​​of different variables are obtained. Taking the instability mode as the benchmark, the initial defects are applied to the lattice thick plate column foundation model for double nonlinear analysis. The lattice thick plate column foundation model with the minimum steel consumption is retained while meeting the ultimate bearing capacity requirements.

[0045] A further optimization scheme is that the method for obtaining the optimal layout strategy includes:

[0046] Arranging the optimal internal support column structure model in the arrangement section according to the internal column arrangement principle;

[0047] By adjusting the position and number of the optimal internal support column structure model, the total steel consumption Qz of the wind tunnel test channel model and the optimal internal support column structure model is calculated based on the maximum stress ratio limit of the upper grid of the wind tunnel test channel; and the structural parameters are obtained by combining the finite element simulation software; the second analysis index D2 is calculated by pre-setting weights for each structural parameter and the total steel consumption Qz: ; where represents the weight of the total steel consumption Qz, n represents the total number of structural parameters, f ji represents the weight of the i-th structural parameter;

[0048] The position and quantity corresponding to the optimal internal support column structure model with the largest second analysis index are used as the optimal layout strategy.

[0049] The present invention also provides an internal support column design system based on finite element simulation software, which is used to implement the above-mentioned internal support column design method based on finite element simulation software. The system includes:

[0050] A construction module is used to construct a wind tunnel test flow channel model and a plurality of internal support column basic models with different structures; the internal support column is a circular tube structure or a lattice structure;

[0051] A pre-processing module is used to analyze the total steel consumption based on the span of the wind tunnel test channel in the direction perpendicular to the channel and the same maximum stress ratio limit value, so as to determine the arrangement section of the internal support column in the wind tunnel test channel;

[0052] The first analysis module is used to configure the basic models of each internal support column and then arrange them in the layout section, adjust the structure of the basic models of the internal support column, and perform a first finite element simulation analysis to obtain an optimal internal support column structure model; the first finite element simulation analysis includes: flow field numerical analysis, ultimate bearing capacity analysis and steel consumption analysis;

[0053] A second analysis module is used to set the optimal internal support column structure model in the layout section, adjust the number and layout position of the optimal internal support column structure model, and perform a second finite element simulation analysis to obtain an optimal layout strategy; the second finite element simulation analysis includes a total steel consumption analysis and a structural overall performance analysis;

[0054] The output module is used to set the internal support columns in the wind tunnel test flow channel according to the optimal layout strategy.

[0055] The present solution also provides a computer-readable medium having a computer program stored thereon, and the computer program is executed by a processor to implement the internal support column design method based on finite element simulation software as described above.

[0056] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0057] 1. The present invention provides an internal support column design method, system and medium based on finite element simulation software; in view of the extremely complex design conditions of large wind tunnels, which have the characteristics of being extra-long, spacious, large-span and special-shaped, an internal support column design method based on finite element simulation software is provided. This scheme improves the design method on the basis of traditional finite element simulation software, and obtains the optimal internal support column structure model by considering the economy and bearing capacity performance through a first finite element simulation analysis, and obtains the optimal layout strategy by considering the economy and structural performance through a second finite element simulation analysis. By arranging internal support columns in the wind tunnel test flow channel according to the optimal layout strategy, the roof span can be reduced and its economy can be optimized under the premise of ensuring that the airflow quality of the wind tunnel is not affected, providing a reference scheme for similar projects.

[0058] 2. The present invention provides an internal support column design method, system and medium based on finite element simulation software; proposes a variety of feasible internal support column structures, and conducts aerodynamic performance, load-bearing capacity and economic analysis and research on each internal support column structure based on finite element simulation software, and finds a reasonable internal column structure and layout plan through comparison, which can effectively reduce the impact on the wind tunnel flow field while ensuring efficient force bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0060] Figure 1 It is a schematic diagram of the flow of the internal support column design method based on finite element simulation software;

[0061] Figure 2 This is a schematic diagram of the circular tube column structure foundation model;

[0062] Figure 3 This is a schematic diagram of the lattice-type slot column foundation model;

[0063] Figure 4 This is the front view of the double-limb lattice-type slot column;

[0064] Figure 5 It is a top view of a double-limb lattice-type slot column;

[0065] Figure 6 This is the front view of the three-limb lattice-type slot column;

[0066] Figure 7 It is a top view of a three-limb lattice-type slot column;

[0067] Figure 8 This is the front view of the four-limb lattice groove column;

[0068] Fig. 9 It is a top view of a four-limb lattice-type slot column;

[0069] Fig.10 This is a schematic diagram of the lattice shuttle column foundation model;

[0070] Fig.11 Schematic diagrams of lattice shuttle column structures with three different variables;

[0071] Fig.12 This is a schematic diagram of the lattice shuttle column foundation model;

[0072] Fig.13 It is a top view of a double-limb lattice box column;

[0073] Fig.14 This is the main view of the double-limb lattice box column;

[0074] Fig.15 This is a schematic diagram of the lattice thick plate column foundation model;

[0075] Fig.16 Two views of lattice thick plate columns;

[0076] Fig.17 Schematic diagram of the cross section of the wind tunnel test flow channel. DETAILED DESCRIPTION

[0077] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0078] The design conditions of large wind tunnels are extremely complex, and they are characterized by being extra long, spacious, large-span, and special-shaped. Traditional wind tunnel cases are directly applied to the research of large wind tunnels, but there are problems such as high cost and unstable structure due to the large amount of steel used. In view of this, this solution provides the following embodiments to solve the above technical problems.

[0079] Embodiment 1: This embodiment provides an internal support column design method based on finite element simulation software for a wind tunnel test flow channel that withstands ultra-high wind pressure and low turbulence, wherein the ultra-high wind pressure and low turbulence are the maximum internal airflow pressure difference of 16.5 kN / m 2 , where superelevation is equal to or greater than 50m; Figure 1 As shown, the method includes:

[0080] Step 1: Construct a wind tunnel test flow channel model and a plurality of basic models of internal support columns with different structures; the internal support column is a circular tube structure or a lattice structure; in this step, the internal support column includes: a circular tube column, a lattice slot column, a lattice shuttle column, a lattice box column and a lattice thick plate column; the basic model of the circular tube column structure is as follows Figure 2 As shown;

[0081] like Figure 3 As shown, the limb section of the lattice-type slot column is a slot or I-shaped section; the lattice-type slot column includes a variety of configurations, and the variables of each configuration can be adjusted; the configurations of the lattice-type slot column include: a cross-sectional double-limb configuration, a cross-sectional three-limb configuration, and a cross-sectional four-limb configuration; wherein adjacent limbs are connected by a plurality of tie bars, wherein the variables of the cross-sectional double-limb configuration and the cross-sectional three-limb configuration both include: limb cross-sectional size, limb spacing, tie bar size, and tie bar spacing;

[0082] The front view and top view of the double-leg lattice slot column are as follows: Figure 4 and Figure 5 As shown, the three-legged lattice slot column is connected by round tube tie bars; the front view and top view are as follows Figure 6 and 7 As shown, the connection is made by using round tube tie bars; the front view and top view of the four-limb lattice slot column are shown in Figure 8 and 9 As shown, use square tube tie bars to connect.

[0083] like Fig.10 As shown in the figure, the limb section of the lattice shuttle column is shuttle-shaped; the configuration of the lattice shuttle column includes configurations with different limb numbers, wherein the variables of the configurations with different limb numbers include the limb section size, limb spacing, tie bar size and tie bar spacing; the lattice shuttle columns with three different variables are shown in the figure. Fig.11 As shown, the longest length of the branch section of the lattice shuttle-type columns in the uppermost row is 2000mm, and the longest width is 500mm; the limb spacing is 1500mm; the longest length of the branch section of the lattice shuttle-type columns in the middle row is 1500mm, and the longest width is 400mm; the limb spacing is 1500mm; the longest length of the branch section of the lattice shuttle-type columns in the lowermost row is 2000mm, and the longest width is 500mm; the limb spacing is 2000mm.

[0084] like Fig.12 As shown, the limb section of the lattice box column is box-shaped, and stiffening ribs are arranged inside the lattice box column. Two adjacent lattice box columns are connected by a number of support rods and oblique supports; the configuration of the lattice box column includes a two-limb configuration of the cross section, wherein the variables of the two-limb configuration of the cross section include: limb section size, limb spacing, number and thickness of stiffening ribs, support rod size and support spacing; the top view and front view of the double-limb lattice box column are as shown Fig.13 and Fig.14 As shown;

[0085] like Figure 15-16 As shown in the figure, the limbs of the lattice thick plate column are steel plates, and adjacent steel plates are connected by steel partitions. The configuration of the lattice thick plate column includes two limb section configurations, and the variables of the two limb section configurations include: limb steel plate thickness, limb spacing, steel partition thickness and spacing, where Fig.16 In the figure, the left side is a top view of the lattice-type thick plate column, and the right side is a front view of the lattice-type thick plate column.

[0086] Step 2: Based on the span of the wind tunnel test channel in the direction perpendicular to the channel and the same maximum stress ratio limit, the total steel consumption is analyzed to determine the layout section of the internal support column in the wind tunnel test channel; Step 2 specifically includes the following steps:

[0087] S21, obtaining the span value of the wind tunnel test flow channel along the direction perpendicular to the flow channel;

[0088] S22, presetting a span threshold, and selecting a section whose span value continuously exceeds the span threshold from the wind tunnel test flow channel as a large span section;

[0089] S23, parameterize the internal support column foundation model of any structure, and set the parameterized internal support column foundation model in the long-span section model according to the internal column arrangement principle. (In the specific implementation process, an overall model of the upper grid + lower concrete of the long-span section is established, and the calculation is performed based on the MIDAS Gen software, in which the concrete columns, grid members, roof members and side plate members are calculated and analyzed based on the beam unit model, and the rib walls and plates are calculated and analyzed based on the plate unit model. The bottoms of all rib walls and columns are set as fixed boundaries, and the column tops are connected to the grid supports. The outer supports are rigidly connected, and the inner supports are hinged.) Calculate the total steel consumption Q1 of the long-span section model and the internal support column foundation model under the condition of the same maximum stress ratio limit value;

[0090] S24, obtaining the total steel consumption Q2 of the large-span section model when the internal support column foundation model is not set;

[0091] S25, when Q1-Q2≥△Q, △Q is the rigidity change threshold, and the current large-span section is determined to be the layout section of the internal support columns.

[0092] In structural design, the larger the span, the higher the economic cost required to achieve it, especially when the span of the wind tunnel loop roof is large at the corner; therefore, the principle of internal column arrangement is: the internal support columns are arranged at the intersection of the horizontal down chord grid and the vertical down chord grid of the upper grid of the wind tunnel test flow channel, and the spacing between adjacent internal support columns is equal; in order to facilitate the arrangement of the column top grid supports, and at the same time arrange them as evenly as possible, so that the span of adjacent grids is as uniform as possible, thereby achieving better economic benefits.

[0093] The cross-sectional view of the wind tunnel test flow channel of this embodiment is as follows: Fig.17 As shown, according to the above analysis method, the spans of the third corner section, the large open angle section, the heat exchanger section, the heat exchanger transition section and the fourth corner section exceed the standard. The simulation calculation satisfies Q1<Q2, indicating that after the internal support columns are set, the steel consumption of the large-span section structure is significantly reduced. Therefore, in order to pursue better economic benefits, the third corner section to the fourth corner section are determined as the arrangement sections of the internal support columns.

[0094] Step 3: After matching parameters of each internal support column basic model, set it in the layout section, adjust the structure of the internal support column basic model, and perform a first finite element simulation analysis to obtain an optimal internal support column structure model; the first finite element simulation analysis includes: flow field numerical analysis, ultimate bearing capacity analysis and steel consumption analysis;

[0095] In this step, the structure of the internal support column basic model is adjusted, including the following methods: adjusting the structure of the internal support column basic model, adjusting the configuration of the internal support column basic model under the same structure, and adjusting the variables of the internal support column basic model under the same structure and configuration;

[0096] The first finite element simulation analysis includes the following methods:

[0097] S31, obtaining the basic model of the internal support column after parameter matching;

[0098] S32, based on the Fluent software, establish the analysis and calculation model of each internal support column foundation model: based on the k-epsilon turbulence model, perform steady-state calculation to obtain the cross-sectional velocity distribution, cross-sectional noise distribution and drag coefficient of each internal support column foundation model; based on the shell unit model and the first-order elastic buckling mode of the internal column, perform finite element elastic-plastic analysis to obtain the bearing capacity and steel consumption of each internal support column foundation model.

[0099] In this step, the method for obtaining the optimal internal support column structure model includes:

[0100] S34, obtaining performance parameters of each internal support column foundation model, the performance parameters including: cross-sectional velocity distribution, cross-sectional noise distribution, resistance coefficient X, bearing capacity Y and steel consumption Qc;

[0101] S35, performing variable configuration elimination on each internal support column foundation model according to single or multiple performance parameters; this step specifically includes the following method:

[0102] For the lattice-type trough column foundation model, the steel consumption of the lattice-type trough column foundation models with different variables and different configurations is directly calculated, and the lattice-type trough column foundation model with the smallest steel consumption is retained;

[0103] In the specific analysis, for the two-limb lattice trough column and the three-limb lattice trough column, the steel consumption is calculated and the optimal two-limb lattice trough column and the optimal three-limb lattice trough column with the minimum steel consumption are retained according to the variable branch height h, branch thickness t and branch spacing C.

[0104] For the four-limb lattice trough column, according to the stability strength calculation formula, it is first assumed that the stability coefficients of the four-limb lattice trough column in the X direction and the Y direction are the same; then the design bearing capacity is determined, and the distance between two adjacent branches of the four-limb lattice trough column in the X direction and the Y direction under different stability coefficients and different branch thicknesses is reversed, so as to obtain the minimum cross-sectional parameters of the four-limb lattice trough column, and thus obtain the optimal four-limb lattice trough column with the minimum steel consumption;

[0105] For lattice trough columns of different configurations, the optimal two-limb lattice trough columns, the optimal three-limb lattice trough columns and the optimal four-limb lattice trough columns are respectively set to be connected by a number of tie bars; then the lattice trough column with the minimum steel consumption among the optimal two-limb lattice trough columns, the optimal three-limb lattice trough columns and the optimal four-limb lattice trough columns is retained.

[0106] For the lattice shuttle column foundation model, the simulated buckling modes, buckling eigenvalues ​​and strong axis instability mode order change data of different variables are obtained, and based on the buckling eigenvalues, initial defects are applied to the two-axis directions of the lattice shuttle column foundation model (in this embodiment, an initial defect of 1 / 250 column height is applied, and material plasticity is considered) to perform double nonlinear analysis to obtain the smaller value of the two-axis buckling bearing capacity; the lattice shuttle column foundation model that meets the bearing capacity requirements is screened out, and the lattice shuttle column foundation model with the smallest steel consumption is retained;

[0107] For the lattice box column foundation model, different parameters are set on the limb section size, limb spacing, number and thickness of stiffening ribs, support rod size and support spacing variables, and simulated buckling modes, buckling eigenvalues ​​and strong axis instability mode order change data of different variables are obtained. Based on the instability mode, an initial defect (an initial defect of 1 / 250 column height is applied in this embodiment) is applied to the lattice box column foundation model for double nonlinear analysis, and the lattice box column foundation model with the smallest steel consumption is retained while meeting the bearing capacity requirements;

[0108] For the lattice thick plate column foundation model, the simulated buckling modes, buckling eigenvalues ​​and strong axis instability mode order change data of different variables (limb steel plate thickness, limb spacing, steel partition thickness and spacing) are obtained. Based on the instability mode, an initial defect (an initial defect of 1 / 250 column height is applied in this embodiment) is applied to the lattice thick plate column foundation model for double nonlinear analysis. The lattice thick plate column foundation model with the smallest steel consumption is retained while meeting the bearing capacity requirements.

[0109] S36, obtaining the influence factor M of each internal support column foundation model on the flow field according to the cross-sectional velocity distribution and the cross-sectional noise distribution; specifically setting the velocity threshold, the larger the distribution area of ​​the cross-sectional velocity exceeding the velocity threshold, the larger the influence factor M; the larger the cross-sectional noise distribution area, the larger the influence factor M.

[0110] S37, after presetting weights for the influencing factor M, the resistance coefficient X, the bearing capacity Y and the steel consumption Qc, the first analysis index D1 is calculated:

[0111] ;

[0112] When setting weights in advance, set them according to actual needs. The more important a parameter is, the greater its weight should be.

[0113] Among them, a represents the weight of the influencing factor; b represents the weight of the resistance coefficient; c represents the weight of the bearing capacity; b represents the weight of the steel consumption;

[0114] S38, taking the internal support column basic model with the largest first index as the optimal internal support column structural model.

[0115] Step 4: setting the optimal internal support column structure model in the layout section, adjusting the number and layout position of the optimal internal support column structure model, and performing a second finite element simulation analysis to obtain an optimal layout strategy; the second finite element simulation analysis includes a total steel consumption analysis and a structural overall performance analysis;

[0116] In this step, the method for obtaining the optimal layout strategy includes:

[0117] S41, arranging the optimal internal support column structure model in the arrangement section according to the internal column arrangement principle;

[0118] S42, by adjusting the position and number of the optimal internal support column structure model, taking the maximum stress ratio limit of the upper grid of the wind tunnel test channel as a condition, calculate the total steel consumption Qz of the wind tunnel test channel model and the optimal internal support column structure model; and obtain the structural parameter J by combining with the finite element simulation software; and calculate the second analysis index D2 after presetting weights for each structural parameter J and the total steel consumption Qz: ; where represents the weight of the total steel consumption Qz, n represents the total number of structural parameters, f ji Indicates the weight of the i-th structural parameter; when the weight is set in advance, it is set according to actual needs. The more important a parameter is, the greater its weight is set;

[0119] S43, taking the position and quantity corresponding to the optimal internal support column structure model with the largest second analysis index as the optimal layout strategy.

[0120] Step 5: Set up internal support columns in the wind tunnel test flow channel according to the optimal layout strategy.

[0121] Embodiment 2: This embodiment provides an internal support column design system based on finite element simulation software, which is used to implement the internal support column design method based on finite element simulation software described in Embodiment 1, and the system includes:

[0122] A construction module is used to construct a wind tunnel test flow channel model and a plurality of internal support column basic models with different structures; the internal support column is a circular tube structure or a lattice structure;

[0123] A pre-processing module is used to analyze the total steel consumption based on the span of the wind tunnel test channel in the direction perpendicular to the channel and the same maximum stress ratio limit value, so as to determine the arrangement section of the internal support column in the wind tunnel test channel;

[0124] The first analysis module is used to configure the basic models of each internal support column and then arrange them in the layout section, adjust the structure of the basic models of the internal support column, and perform a first finite element simulation analysis to obtain an optimal internal support column structure model; the first finite element simulation analysis includes: flow field numerical analysis, ultimate bearing capacity analysis and steel consumption analysis;

[0125] A second analysis module is used to set the optimal internal support column structure model in the layout section, adjust the number and layout position of the optimal internal support column structure model, and perform a second finite element simulation analysis to obtain an optimal layout strategy; the second finite element simulation analysis includes a total steel consumption analysis and a structural overall performance analysis;

[0126] The output module is used to set the internal support columns in the wind tunnel test flow channel according to the optimal layout strategy.

[0127] Embodiment 3: This embodiment provides a computer-readable medium on which a computer program is stored. The computer program is executed by a processor to implement the internal support column design method based on finite element simulation software as described in Embodiment 1; specifically, the following steps are performed:

[0128] Step 1: construct a wind tunnel test flow channel model and a basic model of internal support columns of various structures; the internal support columns are circular tube structures or lattice structures;

[0129] Step 2: Based on the span of the wind tunnel test channel in the direction perpendicular to the channel and the same maximum stress ratio limit, the total steel consumption is analyzed to determine the layout section of the internal support column in the wind tunnel test channel;

[0130] Step 3: After matching parameters of each internal support column basic model, set it in the layout section, adjust the structure of the internal support column basic model, and perform a first finite element simulation analysis to obtain an optimal internal support column structure model; the first finite element simulation analysis includes: flow field numerical analysis, ultimate bearing capacity analysis and steel consumption analysis;

[0131] Step 4: setting the optimal internal support column structure model in the layout section, adjusting the number and layout position of the optimal internal support column structure model, and performing a second finite element simulation analysis to obtain an optimal layout strategy; the second finite element simulation analysis includes a total steel consumption analysis and a structural overall performance analysis;

[0132] Step 5: Set up internal support columns in the wind tunnel test flow channel according to the optimal layout strategy.

[0133] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The internal support column design method based on finite element simulation software is characterized in that: include: Constructing a wind tunnel test flow channel model and a plurality of internal support column basic models with different structures; the internal support column is a circular tube structure or a lattice structure; Based on the span of the wind tunnel test channel in the direction perpendicular to the channel and the same maximum stress ratio limit, the total steel consumption analysis is carried out to determine the layout section of the internal support column in the wind tunnel test channel; After matching parameters of each internal support column basic model, the basic model is arranged in the arrangement section, the structure of the internal support column basic model is adjusted, and a first finite element simulation analysis is performed to obtain an optimal internal support column structure model; The first finite element simulation analysis includes: flow field numerical analysis, ultimate bearing capacity analysis and steel consumption analysis; The optimal internal support column structure model is set in the layout section, the number and layout position of the optimal internal support column structure model are adjusted, and a second finite element simulation analysis is performed to obtain an optimal layout strategy; the second finite element simulation analysis includes a total steel consumption analysis and a structural overall performance analysis; Internal support columns are set in the wind tunnel test flow channel according to the optimal layout strategy.

2. The internal support column design method based on finite element simulation software according to claim 1 is characterized in that: The internal support columns include: round tube columns, lattice trough columns, lattice shuttle columns, lattice box columns and lattice thick plate columns; The limb cross-section of the lattice-type slotted column is slot-shaped or I-shaped; The limb cross-section of the lattice-type shuttle-shaped column is shuttle-shaped; The limb cross-section of the lattice box column is box-shaped, stiffening ribs are arranged inside the lattice box column, and two adjacent lattice box columns are connected by a plurality of support rods and oblique supports; The limbs of the lattice thick plate column are steel plates, and adjacent steel plates are connected by steel partitions.

3. The internal support column design method based on finite element simulation software according to claim 1 is characterized in that: The total steel consumption analysis is performed based on the span of the wind tunnel test flow channel in the direction perpendicular to the flow channel and the same maximum stress ratio limit value, so as to determine the arrangement section of the internal support column in the wind tunnel test flow channel; Included methods: Obtain the span value of the wind tunnel test flow channel in the direction perpendicular to the flow channel; A span threshold is set in advance, and sections whose span values ​​continuously exceed the span threshold are selected from the wind tunnel test flow channel as long-span sections; The internal support column foundation model of any structure is parameterized, and the parameterized internal support column foundation model is set in the long-span section model according to the internal column arrangement principle. The total steel consumption Q1 of the long-span section model and the internal support column foundation model is calculated under the condition of the same maximum stress ratio limit value; Obtain the total steel consumption Q2 of the long-span section model when the internal support column foundation model is not set; When Q1-Q2≥△Q, △Q is the rigidity change threshold, and the current large-span section is determined to be the layout section of the internal support columns.

4. The internal support column design method based on finite element simulation software according to claim 2 is characterized in that: The method of adjusting the structure of the internal support column basic model includes: adjusting the structure of the internal support column basic model, adjusting the configuration of the internal support column basic model under the same structure, and adjusting the variables of the internal support column basic model under the same structure and configuration; The configurations of the lattice-type slotted column include: a cross-sectional double-limb configuration, a cross-sectional three-limb configuration and a cross-sectional four-limb configuration; wherein adjacent limbs are connected by a plurality of tie bars, wherein the variables of the cross-sectional double-limb configuration and the cross-sectional three-limb configuration both include: limb cross-sectional size, limb spacing, tie bar size and tie bar spacing; The configuration of the lattice-type shuttle column includes configurations with different numbers of limbs, wherein the variables of the configurations with different numbers of limbs include: limb cross-sectional dimensions, limb spacing, tie bar dimensions, and tie bar spacing; The configuration of the lattice box column includes a two-limb cross-section configuration, wherein the variables of the two-limb cross-section configuration include: cross-sectional dimensions of the limbs, spacing between the limbs, number and thickness of stiffening ribs, dimensions of support rods, and spacing between supports; The configuration of the lattice-type thick plate column includes a two-limb cross-sectional configuration, and the variables of the two-limb cross-sectional configuration include: the thickness of the limb steel plates, the limb spacing, and the thickness and spacing of the steel partitions.

5. The internal support column design method based on finite element simulation software according to claim 4 is characterized in that: The first finite element simulation analysis includes the following methods: Obtain the basic model of the internal support column after parameter matching; The analytical calculation model of each internal support column foundation model is established based on Fluent software: steady-state calculation is performed based on the k-epsilon turbulence model to obtain the cross-sectional velocity distribution, cross-sectional noise distribution and drag coefficient of each internal support column foundation model; Based on the shell unit model and the deformation of the internal column in the first-order elastic buckling mode, a finite element elastic-plastic analysis was performed to obtain the bearing capacity and steel consumption of each internal supporting column foundation model.

6. The internal support column design method based on finite element simulation software according to claim 5 is characterized in that: The method for obtaining the optimal internal support column structure model includes: Obtaining performance parameters of each internal support column foundation model, the performance parameters including: cross-sectional velocity distribution, cross-sectional noise distribution, resistance coefficient X, bearing capacity Y and steel consumption Qc; Eliminate variable configurations of each internal support column foundation model according to single or multiple performance parameters; According to the cross-sectional velocity distribution and cross-sectional noise distribution, the influence factor M of each internal support column foundation model on the flow field is obtained; The first analysis index D1 is calculated by presetting weights for the influencing factor M, resistance coefficient X, bearing capacity Y and steel consumption Qc: ； Among them, a represents the weight of the influencing factor; b represents the weight of the resistance coefficient; c represents the weight of the bearing capacity; b represents the weight of the steel consumption; The internal support column basic model with the largest first index is taken as the optimal internal support column structure model.

7. The internal support column design method based on finite element simulation software according to claim 6 is characterized in that: The step of eliminating variables from the basic model of each internal support column according to single or multiple performance parameters; Included methods: For the lattice-type trough column foundation model, the steel consumption of the lattice-type trough column foundation models with different variables and different configurations is directly calculated, and the lattice-type trough column foundation model with the smallest steel consumption is retained; For the lattice shuttle column foundation model, the simulated buckling modes and buckling eigenvalues ​​of different variables are obtained. Based on the buckling eigenvalue, initial defects are applied to the two-axis directions of the lattice shuttle column foundation model for double nonlinear analysis to obtain the smaller value of the two-axis buckling bearing capacity; the lattice shuttle column foundation model that meets the ultimate bearing capacity requirements is screened out, and the lattice shuttle column foundation model with the smallest steel consumption is retained; For the lattice box column foundation model, the simulated buckling modes and buckling eigenvalues ​​of different variables are obtained. Based on the instability mode, the initial defects are applied to the lattice box column foundation model for double nonlinear analysis. The lattice box column foundation model with the minimum steel consumption is retained while meeting the ultimate bearing capacity requirements. For the lattice thick plate column foundation model, the simulated buckling modes and buckling eigenvalues ​​of different variables are obtained. Taking the instability mode as the benchmark, the initial defects are applied to the lattice thick plate column foundation model for double nonlinear analysis. The lattice thick plate column foundation model with the minimum steel consumption is retained while meeting the ultimate bearing capacity requirements.

8. The internal support column design method based on finite element simulation software according to claim 1 is characterized in that: The method for obtaining the optimal layout strategy includes: Arranging the optimal internal support column structure model in the arrangement section according to the internal column arrangement principle; By adjusting the position and number of the optimal internal support column structure model, the total steel consumption Qz of the wind tunnel test channel model and the optimal internal support column structure model is calculated based on the maximum stress ratio limit of the upper grid of the wind tunnel test channel; and the structural parameter J is obtained by combining the finite element simulation software; the second analysis index D2 is calculated by pre-setting weights for each structural parameter J and the total steel consumption Qz: ; where represents the weight of the total steel consumption Qz, n represents the total number of structural parameters, f ji represents the weight of the i-th structural parameter; The position and quantity corresponding to the optimal internal support column structure model with the largest second analysis index are used as the optimal layout strategy.

9. The internal support column design system based on finite element simulation software is characterized by: The system is used to implement the internal support column design method based on finite element simulation software according to any one of claims 1 to 8, and comprises: A construction module is used to construct a wind tunnel test flow channel model and a plurality of internal support column basic models with different structures; the internal support column is a circular tube structure or a lattice structure; A pre-processing module is used to analyze the total steel consumption based on the span of the wind tunnel test channel in the direction perpendicular to the channel and the same maximum stress ratio limit value, so as to determine the arrangement section of the internal support column in the wind tunnel test channel; The first analysis module is used to configure the basic models of each internal support column and then arrange them in the layout section, adjust the structure of the basic models of the internal support column, and perform a first finite element simulation analysis to obtain an optimal internal support column structure model; the first finite element simulation analysis includes: flow field numerical analysis, ultimate bearing capacity analysis and steel consumption analysis; A second analysis module is used to set the optimal internal support column structure model in the layout section, adjust the number and layout position of the optimal internal support column structure model, and perform a second finite element simulation analysis to obtain an optimal layout strategy; the second finite element simulation analysis includes a total steel consumption analysis and a structural overall performance analysis; The output module is used to set the internal support columns in the wind tunnel test flow channel according to the optimal layout strategy.

10. A computer readable medium having a computer program stored thereon, characterized in that: The computer program is executed by a processor to implement the internal support column design method based on finite element simulation software as described in any one of claims 1 to 8.

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