A calculation and analysis method and device for airbag-supported movable dam

Abstract

The present invention provides a calculation and analysis method and device for an airbag-supported movable dam, which relates to the field of data processing technology. The method includes: extracting the reaction force of the node at the root of the gate, and performing finite element analysis on the pressure plate separately; applying loads and boundary conditions consistent with the actual situation to solve the stress distribution and deformation of the pressure plate; extracting the constraint force of the main anchor bolt on the pressure plate by obtaining the node force at the connection between the anchor bolt and the pressure plate; calculating the stress distribution of the anchor bolt according to the extracted constraint force of the main anchor bolt, and the known anchor bolt preload and geometric dimensions; comparing the calculated anchor bolt stress with the allowable stress of the anchor bolt material, if the calculated stress is less than the allowable stress, the anchor bolt strength meets the requirements; otherwise, performing design optimization. The present invention can more realistically simulate the geometric shape and stress state of the actual structure, and improve the accuracy of the calculation and analysis.

Description

Technical Field

[0001] The present invention relates to the technical field of data processing, and in particular to a calculation and analysis method and device for an airbag-supported movable dam. Background Art

[0002] In water conservancy projects, movable dams are an important hydraulic structure used to adjust water levels, divert floodwaters, and discharge sediment, etc. Traditional movable dams are mostly made of steel or concrete structures. Although these structures have certain strength and stability, they have problems such as heavy weight, large opening and closing force, easy corrosion, and difficult maintenance during use.

[0003] In order to solve these problems, a new type of airbag-supported movable dam has emerged in recent years. This type of movable dam uses high-strength flexible airbags as a supporting structure, and has the advantages of light weight, small opening and closing force, corrosion resistance, and easy maintenance. However, due to the special structural form of the airbag-supported movable dam, its force performance and stability analysis are relatively complex, requiring special calculations and analysis.

[0004] At present, the calculation and analysis methods for airbag-supported movable dams are not mature and complete enough. Traditional analysis methods are often based on simplified mechanical models and empirical formulas, which are difficult to accurately reflect the actual structural stress performance and deformation. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a calculation and analysis method and device for an airbag-supported movable dam. By establishing a three-dimensional model of a gate, a pressure plate, an anchor bolt and an airbag, the geometric shape and stress state of the actual structure can be more realistically simulated, thereby improving the accuracy of the calculation and analysis.

[0006] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0007] In a first aspect, a calculation and analysis method for an airbag-supported movable dam comprises:

[0008] Build 3D models of gates, pressure plates, anchor bolts and air bags;

[0009] Define material properties and mesh the 3D model;

[0010] According to the actual situation, boundary conditions are applied to the 3D model, and finite element analysis is performed to solve the stress distribution and deformation of the gate under a given load;

[0011] Extract the reaction force of the gate root node and perform finite element analysis on the pressure plate alone;

[0012] Apply loads and boundary conditions that match the actual situation to solve the stress distribution and deformation of the pressure plate;

[0013] The constraint force of the main anchor bolt on the pressure plate is extracted by obtaining the node force at the connection between the anchor bolt and the pressure plate;

[0014] Calculate the stress distribution of the anchor bolt based on the extracted main anchor bolt constraint force, as well as the known anchor bolt preload and geometric dimensions;

[0015] The calculated anchor stress is compared with the allowable stress of the anchor material. If the calculated stress is less than the allowable stress, the anchor strength meets the requirements; otherwise, design optimization is performed.

[0016] Further, the material properties include elastic modulus, Poisson's ratio, density, and yield strength.

[0017] Furthermore, a three-dimensional model of the gate, pressure plate, anchor bolt and airbag is established, including:

[0018] Create a 3D model of the gate based on its shape and size;

[0019] Create a three-dimensional model of the pressure plate based on the connection relationship between the gate and the anchor bolts;

[0020] The diameter, length and distribution of anchor bolts in the structure, and the establishment of a three-dimensional model of anchor bolts;

[0021] Draw 2D sketches including dimensions and contours based on the airbag's design specifications, material properties, and operating conditions;

[0022] Extrude the 2D sketch to generate the 3D shape of the airbag;

[0023] The material properties and boundary conditions of the three-dimensional shape are set, and the airbag connection method is simulated to obtain a three-dimensional model of the airbag.

[0024] Furthermore, the three-dimensional model is meshed, including:

[0025] Read the geometric shape, size and material properties of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt and the 3D model of the airbag;

[0026] Analyze the geometry, dimensions, and material properties to determine the key feature areas of the 3D models of the gate, the pressure plate, the anchor bolt, and the airbag;

[0027] Determine the mesh type and global mesh density according to the geometric complexity and analysis requirements of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt, and the 3D model of the airbag;

[0028] According to the mesh type and global mesh density, the continuous geometric space is divided into a series of elements, each of which is connected at the nodes to form a discretized mesh, where the nodes are the corner points of the elements.

[0029] Furthermore, according to the actual situation, boundary conditions are applied to the 3D model, and finite element analysis is performed to solve the stress distribution and deformation of the gate under a given load, including:

[0030] Assign corresponding physical properties to each element;

[0031] Apply boundary conditions and initial conditions to elements of a 3D model;

[0032] For each element, the local stiffness matrix and force vector are constructed according to the corresponding physical properties and geometric shapes;

[0033] The global stiffness matrix and global force vector of the three-dimensional model are constructed by summing up the local stiffness matrices and force vectors of all elements;

[0034] The global stiffness matrix equation is solved using the conjugate gradient method to obtain the displacement response of each node;

[0035] Based on the nodal displacements, the stress and strain response of each element is calculated.

[0036] Furthermore, the reaction force of the gate root node is extracted, and the pressure plate is subjected to finite element analysis separately, including:

[0037] Apply boundary and load conditions under actual working conditions to the gate model;

[0038] Mesh the gate model, perform finite element solution, and obtain stress, strain, and displacement response data;

[0039] Calculate and extract the reaction force data on the gate root node based on the stress, strain and displacement response data;

[0040] The platen model was meshed and the finite element solver was run to analyze the platen performance based on the configured boundary and loading conditions.

[0041] Furthermore, loads and boundary conditions consistent with the actual situation are applied to solve the stress distribution and deformation of the pressure plate, including:

[0042] Obtain the three-dimensional model of the platen and its meshing data;

[0043] According to the 3D model of the platen and its meshing data, the boundary conditions of the 3D model are determined.

[0044] Configure the solver parameters according to the analysis type, run the solver, and use the finite element analysis algorithm to calculate the three-dimensional model of the pressure plate element by element based on the element stiffness matrix and mass matrix.

[0045] In a second aspect, a computing and analyzing device for an airbag-supported movable dam comprises:

[0046] The acquisition module is used to establish the three-dimensional model of the gate, pressure plate, anchor bolt and airbag; define the properties of the material and mesh the three-dimensional model; apply boundary conditions to the three-dimensional model according to the actual situation, run finite element analysis, and solve the stress distribution and deformation of the gate under a given load; extract the reaction force of the root node of the gate, and perform finite element analysis on the pressure plate separately; apply loads and boundary conditions consistent with the actual situation to solve the stress distribution and deformation of the pressure plate;

[0047] The processing module is used to extract the constraint force of the main anchor bolt on the pressure plate by obtaining the node force at the connection between the anchor bolt and the pressure plate; calculate the stress distribution of the anchor bolt according to the extracted constraint force of the main anchor bolt, as well as the known anchor bolt preload and geometric dimensions; compare the calculated anchor bolt stress with the allowable stress of the anchor bolt material. If the calculated stress is less than the allowable stress, the anchor bolt strength meets the requirements; otherwise, perform design optimization.

[0048] According to a third aspect, a computing device includes:

[0049] one or more processors;

[0050] The storage device is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the method described.

[0051] In a fourth aspect, a computer-readable storage medium stores a program, and when the program is executed by a processor, the method described is implemented.

[0052] The above solution of the present invention includes at least the following beneficial effects:

[0053] By establishing a three-dimensional model of the gate, pressure plate, anchor bolt and airbag, the geometric shape and stress state of the actual structure can be simulated more realistically, thereby improving the accuracy of the calculation and analysis. The present invention adopts the finite element analysis method for solution, which can take into account factors such as material nonlinearity, geometric nonlinearity and contact nonlinearity, and more accurately reflect the stress distribution and deformation of the structure under complex loads. By extracting the reaction force of the root node of the gate and performing finite element analysis on the pressure plate alone, the present invention can more accurately evaluate the stress performance and stability of the pressure plate. By calculating the stress distribution of the anchor bolt and comparing it with the allowable stress of the material, the present invention can determine whether the strength of the anchor bolt meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a schematic diagram of the force model of the gate system of the calculation and analysis method of the airbag-supported movable dam provided in an embodiment of the present invention.

[0055] Figure 2It is a schematic diagram of a pressure plate force model of a calculation and analysis method for an airbag-supported movable dam provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0056] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0057] like Figure 1 As shown, an embodiment of the present invention provides a calculation and analysis method for an airbag-supported movable dam, the method comprising:

[0058] Step 11, establishing a three-dimensional model of the gate, pressure plate, anchor bolt and airbag;

[0059] Step 12, define the properties of the material and mesh the three-dimensional model;

[0060] Step 13, according to the actual situation, the boundary conditions are applied to the three-dimensional model, and the finite element analysis is performed to solve the stress distribution and deformation of the gate under a given load;

[0061] Step 14, extract the reaction force of the gate root node and perform finite element analysis on the pressure plate alone;

[0062] Step 15, applying loads and boundary conditions consistent with the actual situation to solve the stress distribution and deformation of the pressure plate;

[0063] Step 16, extracting the constraint force of the main anchor bolt on the pressure plate by obtaining the node force at the connection between the anchor bolt and the pressure plate;

[0064] Step 17, calculating the stress distribution of the anchor bolt according to the extracted main anchor bolt constraint force, and the known anchor bolt preload force and geometric dimensions;

[0065] Step 18, compare the calculated anchor stress with the allowable stress of the anchor material. If the calculated stress is less than the allowable stress, the anchor strength meets the requirements; otherwise, perform design optimization; the material properties include elastic modulus, Poisson's ratio, density and yield strength.

[0066] In an embodiment of the present invention, step 11, through a three-dimensional model, the geometric characteristics and spatial relationships of the actual structure can be accurately simulated. Step 12, clarifying the physical properties of the material such as elastic modulus, Poisson's ratio, density and yield strength, etc., can ensure the accuracy of the analysis results; meshing helps to strike a balance between calculation accuracy and calculation efficiency. Step 13, applying practical boundary conditions can reflect the constraints and loads under real working conditions, and finite element analysis can accurately predict the stress and deformation response of the gate. Step 14, analyzing the pressure plate separately can more accurately evaluate its stress and deformation state under the action of the gate, which is helpful for optimizing the design. Step 15, applying actual loads and boundary conditions can ensure the practicality and reliability of the analysis results, and help to accurately evaluate the performance of the pressure plate. Step 16, accurately extracting the constraint force of the main anchor bolt is the key to evaluating the performance of the anchor bolt, which is helpful for subsequent anchor bolt strength verification. Step 17, combining the constraint force of the main anchor bolt and other relevant parameters, the stress distribution of the anchor bolt can be accurately calculated. Step 18, by comparing with the allowable stress, the safety of the anchor design can be ensured. If the requirements are not met, the design is optimized to improve the overall performance and safety of the structure.

[0067] In a preferred embodiment of the present invention, a three-dimensional model of a gate, a pressure plate, an anchor bolt and an air bag is established, including:

[0068] Create a 3D model of the gate based on its shape and size;

[0069] Create a three-dimensional model of the pressure plate based on the connection relationship between the gate and the anchor bolts;

[0070] The diameter, length and distribution of anchor bolts in the structure, and the establishment of a three-dimensional model of anchor bolts;

[0071] Draw 2D sketches including dimensions and contours based on the airbag's design specifications, material properties, and operating conditions;

[0072] Extrude the 2D sketch to generate the 3D shape of the airbag;

[0073] The material properties and boundary conditions of the three-dimensional shape are set, and the airbag connection method is simulated to obtain a three-dimensional model of the airbag.

[0074] In the embodiment of the present invention, by creating a three-dimensional model according to the actual size and shape, the actual structure of the gate, pressure plate, anchor bolt and airbag can be accurately simulated. The three-dimensional model provides an intuitive visualization effect, allowing the designer to clearly view and understand the spatial relationship, connection mode and interaction of each component, which helps to find potential design problems and optimize them. Through three-dimensional modeling, rapid design iteration and optimization can be performed in a computer environment, avoiding the cumbersome process of traditional manual drawing and physical prototyping, thereby greatly improving the design efficiency. The three-dimensional model can be easily imported into the finite element analysis software for accurate stress analysis, deformation analysis, stability analysis, etc., providing a powerful tool for performance evaluation and optimization design of the structure. By performing accurate three-dimensional modeling and analysis in the design stage, potential design defects and problems can be discovered in advance, and modifications and optimizations can be made in time, thereby reducing the cost and risk in the actual manufacturing process. The three-dimensional model can be used as a common language for communication and collaboration between various departments, so that various departments such as design, production, procurement, quality inspection, etc. can better understand and perform their respective tasks, and improve overall work efficiency and quality.

[0075] In a preferred embodiment of the present invention, meshing the three-dimensional model includes:

[0076] Read the geometric shape, size and material properties of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt and the 3D model of the airbag;

[0077] Analyze the geometry, dimensions, and material properties to determine the key feature areas of the 3D models of the gate, the pressure plate, the anchor bolt, and the airbag;

[0078] Determine the mesh type and global mesh density according to the geometric complexity and analysis requirements of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt, and the 3D model of the airbag;

[0079] According to the mesh type and global mesh density, the continuous geometric space is divided into a series of elements, each of which is connected at the nodes to form a discretized mesh, where the nodes are the corner points of the elements.

[0080] In an embodiment of the present invention, by meshing the three-dimensional model, the geometry and material properties of the actual structure can be accurately simulated. The meshing can be adjusted according to the geometric complexity of the model and the analysis requirements. Fine meshes can be used in key feature areas to capture more details, and coarser meshes can be used in non-critical areas to save computing resources. Reasonable meshing can balance the relationship between calculation accuracy and calculation efficiency. By optimizing the grid layout and density, the calculation time and cost can be reduced while ensuring the calculation accuracy. The meshed model can be easily post-processed, such as extracting calculation results such as stress, strain, displacement, etc., for visual display and further analysis and evaluation. When there is a problem with the calculation result, by checking the meshing situation, it is easier to locate the possible problem area, which helps to quickly find the cause of the problem and make corrections. For structures containing multiple components and complex connection relationships, such as gates, pressure plates, anchor bolts and airbags, meshing can be performed on each component separately, and then assembled into an overall model for analysis, thereby supporting a comprehensive evaluation of complex structures.

[0081] In a preferred embodiment of the present invention, according to actual conditions, boundary conditions are applied to the three-dimensional model, and finite element analysis is performed to solve the stress distribution and deformation of the gate under a given load, including:

[0082] Assign corresponding physical properties to each element;

[0083] Apply boundary conditions and initial conditions to elements of a 3D model;

[0084] For each element, the local stiffness matrix and force vector are constructed according to the corresponding physical properties and geometric shapes;

[0085] The global stiffness matrix and global force vector of the three-dimensional model are constructed by summing up the local stiffness matrices and force vectors of all elements;

[0086] The global stiffness matrix equation is solved using the conjugate gradient method to obtain the displacement response of each node;

[0087] Based on the nodal displacements, the stress and strain response of each element is calculated.

[0088] In the embodiment of the present invention, by applying boundary conditions and initial conditions according to actual conditions, the constraints and loads to which the gate is subjected in the actual working environment can be accurately simulated, thereby obtaining stress and deformation analysis results that are closer to reality. Finite element analysis can comprehensively consider the geometric shape, material properties, boundary conditions and load conditions of the gate structure, comprehensively evaluate the strength, stiffness and stability of the structure, and provide a reliable basis for structural design. Through finite element analysis, potential problems such as stress concentration and excessive deformation that may exist in the gate structure can be discovered in a timely manner, which is helpful for targeted optimization in the design stage and avoiding safety problems in actual use. According to the results of finite element analysis, the gate structure can be optimized, such as adjusting the structural dimensions, changing the material distribution, etc., to improve the overall performance and economic benefits of the structure. Compared with traditional physical experiments and prototype testing methods, finite element analysis can be completed quickly on a computer, greatly saving time and cost, while avoiding the risks and uncertainties that may be brought about by physical experiments.

[0089] In a preferred embodiment of the present invention, the reaction force of the gate root node is extracted, and the pressure plate is subjected to finite element analysis separately, including:

[0090] Apply boundary and load conditions under actual working conditions to the gate model;

[0091] Mesh the gate model, perform finite element solution, and obtain stress, strain, and displacement response data;

[0092] Calculate and extract the reaction force data on the gate root node based on the stress, strain and displacement response data;

[0093] The platen model was meshed and the finite element solver was run to analyze the platen performance based on the configured boundary and loading conditions.

[0094] In an embodiment of the present invention, by applying boundary and load conditions under actual working conditions to the gate model, the practicality and reliability of the analysis results can be ensured, so that the subsequent analysis of the pressure plate can be based on the real working environment. The reaction force data on the root node is calculated and extracted from the finite element analysis of the gate model. These key data are important bases for evaluating the performance of the pressure plate and help to ensure the accuracy of the analysis. Meshing and finite element analysis of the pressure plate model alone can focus on the performance evaluation of the pressure plate itself without interference from other components, so as to more accurately understand the stress distribution and deformation of the pressure plate under a given load. By independently analyzing the pressure plate, potential stress concentration areas or areas with excessive deformation can be identified, and then the pressure plate structure can be optimized to improve its bearing capacity and stability. Separating the analysis of the gate and the pressure plate can reduce the complexity of the overall analysis, reduce computing time and resource consumption, while maintaining the accuracy of the analysis results. Based on the analysis results of the pressure plate, design iterations can be easily performed, and its performance can be optimized by adjusting the geometry, material properties or connection methods of the pressure plate until the design requirements are met.

[0095] In a preferred embodiment of the present invention, loads and boundary conditions consistent with actual conditions are applied to solve the stress distribution and deformation of the pressure plate, including:

[0096] Obtain the three-dimensional model of the platen and its meshing data;

[0097] According to the 3D model of the platen and its meshing data, the boundary conditions of the 3D model are determined.

[0098] Configure the solver parameters according to the analysis type, run the solver, and use the finite element analysis algorithm to calculate the three-dimensional model of the pressure plate element by element based on the element stiffness matrix and mass matrix.

[0099] In an embodiment of the present invention, by applying loads and boundary conditions that are consistent with the actual situation, it can be ensured that the analysis results of the pressure plate are closer to the actual working conditions, thereby improving the accuracy and reliability of the design. Finite element analysis can fully consider the various forces and constraints that the pressure plate is subjected to in the actual working environment, and then accurately evaluate its stress distribution and deformation. This helps to discover potential design defects and optimize them in a timely manner. According to the stress distribution and deformation results of the pressure plate, the structure, material or connection method of the pressure plate can be optimized to improve its bearing capacity and stability. This helps to reduce the risk of structural failure and improve the safety of the overall structure. Through finite element analysis, the actual working conditions of the pressure plate can be simulated on the computer, avoiding cumbersome and expensive physical experiments and prototype tests. This greatly saves the time and cost of design and development and improves work efficiency. Finite element analysis software usually provides rich post-processing functions, which can intuitively display the analysis results in the form of graphics, charts, etc. This helps designers better understand and interpret the analysis results and communicate effectively with team members or customers. By performing finite element analysis on different design schemes, the performance of each scheme can be quantitatively compared.

[0100] The following is a specific example:

[0101] Taking the gate water retaining height of 5.0 meters (including the dam top flow height) and the gate width of 10 meters as an example, the calculation and analysis method of the airbag supported movable dam is combined with the attached drawings and the technology of the present invention.

[0102] The steps mainly include: the first step is to take the gate as the force object and calculate the constraint force at the root of the gate; the second step is to take the pressure plate as the force analysis object and calculate the constraint force of the main anchor bolt on the pressure plate; the third step is to calculate and verify the strength of the main anchor bolt.

[0103] The first step is to take the gate as the force object and calculate the gate root constraint force

[0104] When the water retaining height of the airbag-supported movable dam is determined, the following basic parameters can be known based on its design structure: gate water retaining height h = 5.0m (including the dam top flow height), gate width b = 10m, water density = 1000kg / m 3 and gravitational acceleration g≈9.80m / s 2 .

[0105] According to its structure, the gate plate is taken as the force analysis object and the force model is established as follows: Figure 1 shown.

[0106] Depend on Figure 1 It can be seen that the gate plate is subjected to the horizontal water pressure F1, the vertical water pressure F2, the gate deadweight F3, the airbag support force F4 and the horizontal constraint force F4 of the foundation soft connection on the gate root. x and the vertical restraint force Fy Balanced by working together.

[0107] Taking the moment from the gate root, we have F1L1+F2L2+F3L3=F4L4(1)

[0108] According to the balance of forces,

[0109]

[0110] In formulas (1), (2), and (3), L1, L2, L3, and L4 are moments, which can be measured from the force model, and F3 is the gate deadweight. It is the angle between the airbag's support force on the gate and the horizontal plane, which is directly measured from the force model. F1 and F2 can be solved by the following formula:

[0111]

[0112] F2=ρgA W1 b (5)

[0113] In formulas (4) and (5), ρ, g, h, and b are known parameters. W1 is the water pressure area acting on the gate cross section, Figure 1 The shaded area on the middle gate.

[0114] Combining formulas (1)(2)(3)(4)(5), we can obtain F4 and F x 、F y .

[0115] The airbag supports the gate F4 and the foundation soft connection exerts a horizontal constraint force F on the gate root x and the vertical restraint force F y Balanced by working together.

[0116] The second step is to take the pressure plate as the force analysis object and obtain the restraining force of the main anchor bolt on the pressure plate;

[0117] Take the pressure plate as the force object to establish the force model as follows Figure 2 As shown in the figure, the pressure plate is under the preload force F of the main anchor bolt, and the force F acting on the pressure plate by the gate root x 、F y , the ground's support force on the pressure plate F a 、F b and friction force F f and are balanced under the joint action of.

[0118] According to the principle of force balance, the moment of point A is F×aF B ×(a+b)-F y ×

[0119] (a+b+c)-F x ×d=0 (6) According to the balance of forces, F f -F x =0 (7)

[0120] FF a -F b -F y =0 (8)

[0121] In formulas (6) and (7), a, b, c, and d are torques, which can be obtained by calculation or measurement in the structure diagram; the friction force F f Solve for F by f =F×μ; (9) In formula (9), μ is the friction coefficient between the pressure plate and the foundation soft connection, which is a constant.

[0122] Combining formulas (6), (7), (8), and (9), we can obtain the main anchor bolt preload F and friction force F f , the ground's reaction force on the pressure plate is F A and F B

[0123] In the first step, the airbag supports the gate with a force F4 and the foundation soft connection exerts a horizontal constraint force F on the gate root. x and the vertical restraint force F y The two components are balanced under the joint action. In this step, the pressure plate is taken as the force analysis object, and the constraint force data of the main anchor bolt on the pressure plate (i.e. the anchor bolt preload F) can be obtained.

[0124] The third step is to check the strength of the main anchor bolts;

[0125] In the second step, the anchor preload F is obtained, and the anchor stress can be solved by the following formula:

[0126]

[0127] In formula (10), Z is the number of anchor bolts, and d12 is the dangerous section diameter of the anchor bolt, which can be obtained by checking the relevant manual. The anchor bolt strength is checked by the following formula [σ]>2σ(11)

[0128] [σ] is the allowable stress of the anchor bolt.

[0129] Combined with the calculations in the first and second steps, the airbag supports the gate F4 and the foundation soft connection exerts a horizontal constraint force F on the gate root. x and the vertical restraint force F y Under the premise of balance under joint action, we calculated the constraint force data of the main anchor bolt on the pressure plate (i.e. the anchor bolt preload F). Combined with the calculation in this step, we can calculate the anchor bolt allowable stress [σ].

[0130] like Figure 2 As shown, an embodiment of the present invention further provides a computing and analyzing device 20 for an airbag-supported movable dam, comprising:

[0131] The acquisition module 21 is used to establish a three-dimensional model of the gate, the pressure plate, the anchor bolt and the airbag; define the properties of the material and mesh the three-dimensional model; apply boundary conditions to the three-dimensional model according to the actual situation, run finite element analysis, and solve the stress distribution and deformation of the gate under a given load; extract the reaction force of the root node of the gate, and perform finite element analysis on the pressure plate separately; apply loads and boundary conditions consistent with the actual situation to solve the stress distribution and deformation of the pressure plate;

[0132] The processing module 22 is used to extract the constraint force of the main anchor bolt on the pressure plate by obtaining the node force at the connection between the anchor bolt and the pressure plate; calculate the stress distribution of the anchor bolt according to the extracted constraint force of the main anchor bolt, and the known anchor bolt preload and geometric dimensions; compare the calculated anchor bolt stress with the allowable stress of the anchor bolt material. If the calculated stress is less than the allowable stress, the anchor bolt strength meets the requirements; otherwise, perform design optimization.

[0133] Optionally, material properties include elastic modulus, Poisson's ratio, density, and yield strength.

[0134] Optionally, create a 3D model of the gate, pressure plate, anchor bolt and airbag, including:

[0135] Create a 3D model of the gate based on its shape and size;

[0136] Create a three-dimensional model of the pressure plate based on the connection relationship between the gate and the anchor bolts;

[0137] The diameter, length and distribution of anchor bolts in the structure, and the establishment of a three-dimensional model of anchor bolts;

[0138] Draw 2D sketches including dimensions and contours based on the airbag's design specifications, material properties, and operating conditions;

[0139] Extrude the 2D sketch to generate the 3D shape of the airbag;

[0140] The material properties and boundary conditions of the three-dimensional shape are set, and the airbag connection method is simulated to obtain a three-dimensional model of the airbag.

[0141] Optionally, mesh the 3D model, including:

[0142] Read the geometric shape, size and material properties of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt and the 3D model of the airbag;

[0143] Analyze the geometry, dimensions, and material properties to determine the key feature areas of the 3D models of the gate, the pressure plate, the anchor bolt, and the airbag;

[0144] Determine the mesh type and global mesh density according to the geometric complexity and analysis requirements of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt, and the 3D model of the airbag;

[0145] According to the mesh type and global mesh density, the continuous geometric space is divided into a series of elements, each of which is connected at the nodes to form a discretized mesh, where the nodes are the corner points of the elements.

[0146] Optionally, based on actual conditions, boundary conditions are applied to the 3D model and finite element analysis is performed to solve the stress distribution and deformation of the gate under a given load, including:

[0147] Assign corresponding physical properties to each element;

[0148] Apply boundary conditions and initial conditions to elements of a 3D model;

[0149] For each element, the local stiffness matrix and force vector are constructed according to the corresponding physical properties and geometric shapes;

[0150] The global stiffness matrix and global force vector of the three-dimensional model are constructed by summing up the local stiffness matrices and force vectors of all elements;

[0151] The global stiffness matrix equation is solved using the conjugate gradient method to obtain the displacement response of each node;

[0152] Based on the nodal displacements, the stress and strain response of each element is calculated.

[0153] Optionally, extract the reaction force of the gate root node and perform finite element analysis on the pressure plate alone, including:

[0154] Apply boundary and load conditions under actual working conditions to the gate model;

[0155] Mesh the gate model, perform finite element solution, and obtain stress, strain, and displacement response data;

[0156] Calculate and extract the reaction force data on the gate root node based on the stress, strain and displacement response data;

[0157] The platen model was meshed and the finite element solver was run to analyze the platen performance based on the configured boundary and loading conditions.

[0158] Optionally, apply loads and boundary conditions that match the actual situation to solve the stress distribution and deformation of the platen, including:

[0159] Obtain the three-dimensional model of the platen and its meshing data;

[0160] According to the 3D model of the platen and its meshing data, the boundary conditions of the 3D model are determined.

[0161] Configure the solver parameters according to the analysis type, run the solver, and use the finite element analysis algorithm to calculate the three-dimensional model of the pressure plate element by element based on the element stiffness matrix and mass matrix.

[0162] It should be noted that the device is a device corresponding to the above method, and all implementation methods in the above method embodiment are applicable to this embodiment and can achieve the same technical effect.

[0163] The embodiment of the present invention further provides a computer, comprising: a processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the method described above is executed. All implementations in the above method embodiment are applicable to this embodiment and can achieve the same technical effect.

[0164] The embodiment of the present invention also provides a computer-readable storage medium storing instructions, which, when executed on a computer, enable the computer to execute the method described above. All implementations in the above method embodiment are applicable to this embodiment and can achieve the same technical effect.

[0165] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed in the present invention can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0166] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0167] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0168] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0169] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0170] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical disks.

[0171] In addition, it should be noted that in the apparatus and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. Moreover, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but it is not necessary to perform them in chronological order, and some steps can be performed in parallel or independently of each other. For those of ordinary skill in the art, it is understood that all or any steps or components of the method and apparatus of the present invention can be implemented in any computing device (including processors, storage media, etc.) or a network of computing devices in hardware, firmware, software or a combination thereof, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0172] Therefore, the purpose of the present invention can also be achieved by running a program or a group of programs on any computing device. The computing device can be a well-known general device. Therefore, the purpose of the present invention can also be achieved by simply providing a program product containing a program code that implements the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent schemes of the present invention. In addition, the steps of performing the above-mentioned series of processing can naturally be performed in chronological order according to the order of description, but it is not necessary to perform them in chronological order. Some steps can be performed in parallel or independently of each other.

[0173] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A calculation and analysis method for an airbag-supported movable dam, characterized in that: The method comprises: Build 3D models of gates, pressure plates, anchor bolts and air bags; Define material properties and mesh the 3D model; According to the actual situation, boundary conditions are applied to the 3D model, and finite element analysis is performed to solve the stress distribution and deformation of the gate under a given load; Extract the reaction force of the gate root node and perform finite element analysis on the pressure plate alone; Apply loads and boundary conditions that match the actual situation to solve the stress distribution and deformation of the pressure plate; The constraint force of the main anchor bolt on the pressure plate is extracted by obtaining the node force at the connection between the anchor bolt and the pressure plate; Calculate the stress distribution of the anchor bolt based on the extracted main anchor bolt constraint force, as well as the known anchor bolt preload and geometric dimensions; The calculated anchor stress is compared with the allowable stress of the anchor material. If the calculated stress is less than the allowable stress, the anchor strength meets the requirements; otherwise, the design is optimized. The material properties include elastic modulus, Poisson's ratio, density and yield strength. A three-dimensional model of the gate, pressure plate, anchor and airbag is established, including: Create a 3D model of the gate based on its shape and size; Create a three-dimensional model of the pressure plate based on the connection relationship between the gate and the anchor bolts; The diameter, length and distribution of anchor bolts in the structure, and the establishment of a three-dimensional model of anchor bolts; Draw 2D sketches including dimensions and contours based on the airbag's design specifications, material properties, and operating conditions; Extrude the 2D sketch to generate the 3D shape of the airbag; Set the material properties and boundary conditions of the 3D shape and simulate the airbag connection method to obtain the 3D model of the airbag; mesh the 3D model, including: Read the geometric shape, size and material properties of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt and the 3D model of the airbag; Analyze the geometry, dimensions, and material properties to determine the key feature areas of the 3D models of the gate, the pressure plate, the anchor bolt, and the airbag; Determine the mesh type and global mesh density according to the geometric complexity and analysis requirements of the 3D model of the gate, the 3D model of the pressure plate, the 3D model of the anchor bolt, and the 3D model of the airbag; According to the mesh type and global mesh density, the continuous geometric space is divided into a series of elements, each of which is connected to a node to form a discrete mesh, where a node is the corner point of an element; according to the actual situation, boundary conditions are applied to the 3D model, and finite element analysis is run to solve the stress distribution and deformation of the gate under a given load, including: Assign corresponding physical properties to each element; Apply boundary conditions and initial conditions to elements of a 3D model; For each element, the local stiffness matrix and force vector are constructed according to the corresponding physical properties and geometric shapes; The global stiffness matrix and global force vector of the three-dimensional model are constructed by summing up the local stiffness matrices and force vectors of all elements; The global stiffness matrix equation is solved using the conjugate gradient method to obtain the displacement response of each node; According to the node displacement, the stress and strain response of each element is calculated; the reaction force of the gate root node is extracted, and the finite element analysis of the pressure plate is performed separately, including: Apply boundary and load conditions under actual working conditions to the gate model; Mesh the gate model, perform finite element solution, and obtain stress, strain, and displacement response data; Calculate and extract the reaction force data on the gate root node based on the stress, strain and displacement response data; The platen model is meshed and the finite element solver is run to analyze the platen performance according to the configured boundary and load conditions. Loads and boundary conditions consistent with the actual situation are applied to solve the stress distribution and deformation of the platen, including: Obtain the three-dimensional model of the platen and its meshing data; According to the 3D model of the platen and its meshing data, the boundary conditions of the 3D model are determined. Configure the solver parameters according to the analysis type, run the solver, and use the finite element analysis algorithm to calculate the three-dimensional model of the pressure plate element by element based on the element stiffness matrix and mass matrix.

2. A computing and analyzing device for an airbag-supported movable dam, characterized in that: As used in claim 1, comprising: The acquisition module is used to establish the three-dimensional model of the gate, pressure plate, anchor bolt and airbag; define the properties of the material and mesh the three-dimensional model; apply boundary conditions to the three-dimensional model according to the actual situation, run finite element analysis, and solve the stress distribution and deformation of the gate under a given load; extract the reaction force of the root node of the gate, and perform finite element analysis on the pressure plate separately; apply loads and boundary conditions consistent with the actual situation to solve the stress distribution and deformation of the pressure plate; The processing module is used to extract the constraint force of the main anchor bolt on the pressure plate by obtaining the node force at the connection between the anchor bolt and the pressure plate; calculate the stress distribution of the anchor bolt according to the extracted constraint force of the main anchor bolt, as well as the known anchor bolt preload and geometric dimensions; compare the calculated anchor bolt stress with the allowable stress of the anchor bolt material. If the calculated stress is less than the allowable stress, the anchor bolt strength meets the requirements; otherwise, perform design optimization.

3. A computing device, characterized in that: include: one or more processors; A storage device, used for storing one or more programs, when the one or more programs are executed by the one or more processors, the one or more processors implement the method as claimed in claim 1.

4. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program, which implements the method according to claim 1 when executed by a processor.

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