Regulation method for optimizing prestress of back pull rod of miter gate based on orthogonal analysis

Abstract

The invention provides a debugging method for optimizing the prestress of a back pull rod of a miter gate based on orthogonal analysis, and the method comprises the following steps: S1, looking up a miter gate drawing, carrying out the data integration, and building a three-dimensional model of the miter gate through Creo software; s2, setting simulation parameters of the miter gate under the door opening condition, the door closing condition and the overhanging condition, and constructing a miter gate simulation model; and S3, ANSYS simulation software is utilized for simulation, and the deformation conditions of the miter gate under different back pull rod prestress under the door opening working condition, the door closing working condition and the overhanging working condition are calculated correspondingly. And S4, importing the result of ANSYS simulation calculation into the SPSSAU for optimization analysis, and substituting the obtained conclusion into ANSYS for verification analysis. The 14 back pull rods of the miter gate are optimized and calculated by using an orthogonal experimental method for the first time, the optimal back pull rod prestress debugging reference is determined, and the blank of the debugging reference in the field is filled.

Description

Technical Field

[0001] This invention belongs to the field of lock miter gate installation technology, and more specifically relates to a method for optimizing the prestressing adjustment of miter gate back tie rod based on orthogonal analysis. Background Technology

[0002] With the increasing emphasis on global water resource management, dams, as key water flow regulation hubs and flood control projects, are playing an increasingly important role. Among them, the miter gate, a crucial facility in ship locks, plays a vital role in regulating water levels, controlling water flow, and ensuring safe navigation for vessels. Its design and performance are critical to the quality of dam projects. During operation, ship lock miter gates typically withstand various complex loads, including water pressure, their own weight, and opening and closing forces. These loads can cause torsional deformation of the gate, affecting its normal operation and lifespan. Therefore, effectively controlling gate deformation and improving its fatigue resistance and overall stability have become key issues in ensuring the safe operation of miter gates. Research shows that rationally configuring the back tie rod prestress can effectively improve the torsional stiffness of the gate, enhancing its load-bearing capacity and stability. In actual operation, to more efficiently and rationally configure the back tie rod prestress and keep the gate deformation within allowable limits, a set of scientific prestressing adjustment benchmarks needs to be selected. Therefore, rationally selecting back tie rod prestressing adjustment benchmarks plays a crucial role in improving the efficiency of gate prestressing adjustment.

[0003] However, existing technologies have not established clear commissioning benchmarks, making it impossible to quickly determine the optimal prestress of the gate's back tie rod. Under different operating conditions, the gate often requires multiple tests and repeated adjustments to determine the appropriate prestress value, a time-consuming and inefficient process. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this invention is to provide a method for optimizing the prestressing adjustment of the back tie rod of a herringbone gate based on orthogonal analysis, aiming to determine a reasonable adjustment benchmark for the prestressing of the back tie rod. The orthogonal experimental method can comprehensively examine the influence of various horizontal factors on the deformation of the herringbone gate with a limited number of experiments, effectively reducing computational costs, improving optimization efficiency, and obtaining the optimal adjustment benchmark for the prestressing of the back tie rod.

[0005] To achieve the above-mentioned technical features, the objective of this invention is as follows: A method for optimizing the prestressing adjustment of the back tie rod of a herringbone door based on orthogonal analysis, comprising the following steps: S1: Review the herringbone gate drawings, integrate the data, and use Creo software to create a 3D model of the herringbone gate; S2: Set the simulation parameters of the miter door under the conditions of opening, closing and hanging, and build a simulation model of the miter door; S3: Using ANSYS simulation software, the deformation of the miter gate under different back tie rod prestresses was calculated in the open, closed and suspended conditions.

[0006] S4: Use the results of ANSYS simulation calculations to import SPSSAU for optimization analysis, and substitute the conclusions into ANSYS for verification analysis.

[0007] Preferably, S1 specifically includes: S1.1, Review the herringbone door drawings and measure the length, width, and height of the herringbone door; measure the dimensions and quantity of the main beam, crossbeam, main and auxiliary back tie rods, panel, rear flange plate, top pivot, bottom pivot, and diagonal joint column; S1.2 In Creo software, draw the main beam, crossbeam, main and auxiliary back tie rods, panel, rear flange plate, top pivot, bottom pivot, and diagonal column of the herringbone door. S1.3, array the drawn main beams and cross beams to reach the required number for the herringbone door; S1.4 Assemble the drawn herringbone door components.

[0008] Preferably, S2 specifically includes: S2.1 Calculate wind load. The pressure exerted by the wind on the gate is calculated using the following formula: ; In the formula: This is the basic wind pressure; It is the wind pressure shape coefficient; It is the wind pressure height variation coefficient; Because the gate operates at a certain angle, the wind pressure does not act perpendicularly on the gate. The formula for calculating the horizontal pressure exerted by the wind on the gate at this time is as follows: ; In the formula: h 1 represents the height of the gate; The size of the angle is equal to the opening angle of the gate, and it changes continuously as the gate rotates. The water depth at the highest design water level downstream; The width of the leaf; S2.2 When the miter gate is opened and closed, the load is calculated based on the force balance calculation, and the support reaction force of the top pivot is calculated. D x , D y The supporting reaction force of the bottom pivot R x , R y , R z For the unknowns, establish a system of equilibrium equations: ; In the formula:T It is the force of opening and closing; h 1 represents the height of the gate; h 2 is the maximum height difference between the downstream navigable water level and the threshold; h 3 is half the width of the gate; h 4 is the distance between the position of the push-pull rod and the top pivot; h 5 is the distance from the center point of the unsubmerged part of the gate to the bottom; It is the sum of the gate's weight and the vertical load on the working bridge; It is the pressure of the backwater; It is horizontal wind pressure; It is the angle formed by the push-pull rod and the door axis; S2.3, Calculate the friction torque of the top pivot and bottom pivot. The calculation formula is as follows: ; ; In the formula: f It is the coefficient of friction; D It is the support reaction force acting on the top pivot. ; d D It is the diameter of the top pivot; R It is the support reaction force acting on the bottom pivot. ; It is the bottom pivot friction radius. , r It is the radius of the spherical surface of the mushroom head at the bottom pivot; S2.4 sets the parameters of gravity, wind load, opening and closing force, water pressure, back tie rod prestress, mushroom head top and bottom pivot, support reaction force, and friction torque under opening, closing, and suspension conditions.

[0009] Preferably, in S2.1 Calculations were performed in accordance with the national standard GBJ9-87 "Code for Design of Structural Loads of Industrial and Civil Buildings". ,in V The annual average wind speed is the average wind speed of a certain region. The gate Take 1.3; According to national standards, the value should be 1.00.

[0010] Preferably, in step S2.3, the wear condition is taken into account, and the coefficient of friction is taken as... f =0.3.

[0011] Preferably, S3 specifically includes: S3.1 Import the 3D model of the herringbone gate into the ANSYS simulation software, and first assign structural dimensions and material properties to the herringbone gate; S3.2, further divide the herringbone gate into grids; S3.3, Set the parameter data calculated in S2.4 in ANSYS for different working conditions respectively; S3.4 Analyze whether the simulation results conform to the material properties.

[0012] Preferably, S4 specifically includes: S4.1. The results of the ANSYS calculations are comprehensively analyzed to obtain a data table. The data table is then imported into SPSSAU for orthogonal analysis, which will produce an orthogonal experimental table and an orthogonal analysis result graph. S4.2, the obtained optimal combination is substituted into ANSYS simulation calculation for verification.

[0013] The present invention has the following beneficial effects: 1. This invention is the first to use orthogonal experimental design to optimize the calculations of 14 back tie rods for a herringbone gate, determining the optimal prestressing benchmark for the back tie rods and filling a gap in the field of benchmarking. Previously, existing technologies had not established clear benchmarks and could not quickly determine the optimal prestress value.

[0014] 2. This invention combines ANSYS simulation analysis with orthogonal experiments to form a systematic optimization design method. The orthogonal experimental method can comprehensively examine the influence of various level factors on the deformation of the herringbone gate with a limited number of experiments, effectively reducing computational costs, improving optimization efficiency, and solving the problem of time-consuming and inefficient traditional methods that involve multiple experiments and repeated adjustments.

[0015] 3. This invention integrates Creo 3D modeling, ANSYS simulation calculation, SPSSAU orthogonal analysis and other technologies to form a complete process from model establishment, parameter setting, simulation to result optimization and verification, providing an operable technical solution for efficiently determining the prestress of the back tie rod. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is an overall flowchart of the method of the present invention.

[0018] Figure 2 Create a 3D model of the herringbone door for Creo.

[0019] Figure 3 A schematic diagram illustrating the force applied during the opening and closing of a V-shaped door.

[0020] Figure 4 This is a schematic diagram of ANSYS mesh generation.

[0021] Figure 5The image shows the simulation results for the door closing condition.

[0022] Figure 6 The image shows the simulation results for the door opening condition.

[0023] Figure 7 The diagram shows the relationship between the prestress of each back tie rod and the deformation of the gate.

[0024] Figure 8 This is a verification diagram for the suspended working condition. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, the method for optimizing the prestressing adjustment of the back tie rod of a herringbone door based on orthogonal analysis is implemented according to the following steps: S1: Review the herringbone gate drawings, integrate the data, and use Creo software to create a 3D model of the herringbone gate; S1.1: Open Creo software and create a new part drawing. First, select the top view as the reference plane and draw a curved surface with a length of 20.2m and a width of 3m for the crossbeam. Array the crossbeams according to their spacing, specifically 25 arrays. Then, select the left view as the reference plane and draw a curved surface with a length of 38.5m and a width of 3m, arraying 5 arrays. Finally, select the front view as the reference plane and draw the rear flange and back plate.

[0027] S1.2: Create a new Creo part drawing, and establish solid structures such as bottom pivot, sleeve, and side plate; shell element structures such as back plate stiffeners and side plate stiffeners.

[0028] S1.3: Create another Creo part drawing, and create a back brace solid structure with a length of 20.47m, a width of 2.7m, and a thickness of 0.2m, as well as a pad structure.

[0029] S1.4: Open Creo and create a new assembly drawing. Assemble the parts drawn in S1.1, S1.2, and S1.3 to obtain the following result: Figure 2 The image shown is a 3D diagram of a herringbone gate.

[0030] S2: Set simulation parameters for different working conditions and construct a simulation model. The parameter settings mainly include parameters such as self-weight, wind load, opening and closing force, water pressure, back tie rod prestress, mushroom head top and bottom pivot, support reaction force, and friction torque.

[0031] S2.1 First, calculate the wind load. The pressure exerted by the wind on the gate can be calculated using the following formula: ; In the formula: This is the basic wind pressure, which can be calculated with reference to the national standard GBJ9-87 "Code for Design of Structural Loads of Industrial and Civil Buildings". ,unit ,in V The unit is m / s, which represents the local annual average wind speed. The annual average wind speed in a certain area is 20.8 m / s. The wind pressure shape coefficient is taken as 1.3; The wind pressure height variation coefficient is set to 1.00, in accordance with national standards.

[0032] Because the gate operates at a certain angle, the wind pressure does not act perpendicularly on the gate. The formula for calculating the horizontal pressure exerted by the wind on the gate at this time is as follows: ; In the formula: h 1 represents the height of the gate; The size of the angle is equal to the opening angle of the gate, and it changes continuously as the gate rotates. H 1=26m is the water depth at the highest design water level downstream; =3m door leaf width.

[0033] S2.2, When calculating the reaction force of the herringbone door support, if... Figure 3 As shown, the relationship between the forces acting on the gate during the closing process is illustrated, including the reaction force of the top pivot. D x , D y The supporting reaction force of the bottom pivot R x , R y , R z Unknown quantity, and opening / closing force T The size and direction of the gate change with the angle formed by the push-pull rod and the gate axis during the opening and closing process. The equations change with the change of [something], and a system of equilibrium equations can be written as follows: ; In the formula: T is the opening and closing force; h 1 = 38.5m is the height of the gate; h 2=26 m is the maximum height difference between the downstream navigable water level and the threshold; h 3 = 15m is half the width of the gate; h 4 = 6.1m is the distance between the position of the push-pull rod and the top pivot. h5 = 13.9m is the distance from the center point of the unsubmerged part of the gate to the bottom; G 0= G + Q 2 = 9806.016 kN is the sum of the gate's weight and the vertical load on the working bridge; It is the pressure of the backwater; It is horizontal wind pressure; It is the angle formed by the push-pull rod and the door axis; S2.3, Calculate the frictional torque. During the rotation of the gate, the top pivot will be affected by the torque generated by the friction of the journal bearing, and the bottom pivot will be affected by the torque generated by the friction between the mushroom head and the bushing. ; ; In the formula: f This is the coefficient of friction; considering wear, a larger value is chosen. f =0.3; D It is the support reaction force acting on the top pivot. ; d D =500mm is the diameter of the top pivot; R It is the support reaction force acting on the bottom pivot. ; It is the bottom pivot friction radius. , r =500mm is the radius of the spherical surface of the mushroom head at the bottom pivot; S2.4 sets the parameters of gravity, wind load, opening and closing force, water pressure, back tie rod prestress, mushroom head top and bottom pivot, support reaction force, and friction torque under opening, closing, and suspension conditions.

[0034] S3: Using ANSYS simulation software, the deformation of the gate under different back-stayed prestress conditions (opening, closing, and suspended) is calculated. The specific method is as follows: S3.1 Import the 3D model of the herringbone door into the ANSYS simulation software. First, assign structural dimensions to the herringbone door. The thickness of the transverse diaphragms is set to 40mm for layers 0-12, 19.4mm for layers 13-14, 18mm for layers 15-23, and 16mm for layer 24. The thickness of the longitudinal diaphragms is set to 16mm, the back plate to 17mm, the rear flange to 30mm, and the stiffener thickness to 16mm. This results in a total weight of 800t, with side stiffeners at 22mm and side plates at 44mm.

[0035] S3.2, set the material properties for the herringbone door structure. Select structural steel as the material, with an elastic modulus of 200,000 MPa, Poisson's ratio of 0.3, and a density of 7,850 kg / m³. Use the default values ​​for other properties.

[0036] S3.3, Mesh the herringbone door. The mesh is mainly hexahedral, with most mesh quality above 0.9. The model has a total of 491,683 elements and 580,836 nodes. The mesh generation is as follows: Figure 4 As shown.

[0037] S3.4 Static structural design of the miter gate was performed, setting different boundary conditions for different working conditions. First, for the closing condition, the gravity was set to 9806.06 KN, the upstream water level to 26000 mm, the downstream water level to 26200 mm, the top and bottom pivots fixed, the opening and closing force to 2100 KN, the friction force to 0.3, the wind load to 0.0001316 MPa, and parameters such as prestressing of 14 back tie rods (upper main back tie rod, upper auxiliary back tie rod, lower main back tie rod, lower auxiliary back tie rod) were set, and simulation calculations were performed. The simulation results are as follows: Figure 5 As shown in the figure. Secondly, boundary conditions were set for the door opening condition: gravity was 9806.06 kN, upstream water level was 26200 mm, downstream water level was 26000 mm, and opening / closing force was 1700 kN. All other conditions were the same as for the door closing condition. The simulation results are shown in the figure. Figure 6 As shown. Finally, boundary conditions were set for the suspended condition: gravity 9806.06KN, no opening / closing force, no friction torque, no upstream / downstream water levels, and the remaining conditions were the same as for the closed condition.

[0038] S3.5, Check if the simulation results match reality. Record and save the calculation results.

[0039] S4: Import the results of ANSYS simulation calculations into the SPSSAU tool for optimization analysis. The specific analysis is as follows: S4.1 represents the gate deformation under simulated operating conditions. The L-factor, 5-level design using SPSSAU is employed. 25 (4 5 The orthogonal array is shown in the left column of Table 2 below, and orthogonal experiments will be arranged accordingly. Each working condition will be based on L 25 (4 5 The orthogonal array was used to conduct 25 sets of experiments using ANSYS finite element analysis, for a total of 75 sets. In engineering practice, the rationality assessment of gate deformation is usually based on the deformation under static suspension conditions. Therefore, this study uses the deformation under suspension conditions as a reference to systematically evaluate whether the gate deformation under two typical dynamic conditions—opening and closing—meets engineering standards.

[0040] S4.2 SPSSAU was used to perform a range analysis on the above average values. The analysis results are shown in Table 3. The relationship between the prestress of each tie rod and the gate deformation is as follows: Figure 7As shown. Based on the range analysis results, the optimal level of each factor can be determined, thereby obtaining the overall optimal prestressing combination scheme.

[0041] according to Figure 7 The broken line showing the effect of the prestress of the upper main tie rod on the gate deformation indicates that the gate deformation exhibits a distinct upward-opening parabolic characteristic as the prestress changes, with the deformation first decreasing and then increasing. The gate deformation reaches its minimum value when the prestress is 90 MPa.

[0042] The effect of prestress on gate deformation of the upper auxiliary tie rod is as follows: Figure 7 The two broken lines are shown. The analysis results show that the gate deformation exhibits a trend of first increasing, then decreasing, and then increasing again with the change of prestress, reaching a minimum value at 60 MPa.

[0043] According to the prestress curve of the lower main tie rod, the gate deformation shows a trend of first decreasing and then increasing with the change of prestress, reaching the minimum value at 70 MPa.

[0044] according to Figure 7 The broken line showing the effect of the prestress of the lower auxiliary tie rod on the gate deformation indicates that the gate deformation has a good control effect when the prestress is at its minimum value of 60MPa.

[0045] S4.3: Substitute the obtained debugging benchmark into the ANSYS suspended working condition for verification analysis, and the results are as follows. Figure 8 As shown.

[0046] To verify the effectiveness of the above-mentioned commissioning benchmark scheme, the optimal prestressing scheme obtained from orthogonal experiments was applied to the simulation of the suspended working condition. Using the deformation under the suspended working condition as a reference, the calculation results are as follows: Figure 8 As shown, the deformation is 4.089 mm, and the maximum deformation does not exceed 7 mm, which meets the deformation range.

[0047] In this example, based on the initial design of a herringbone gate, the prestress range of the back tie rod is 60 MPa-100 MPa. In the table, the upper main tie rod represents the upper main back tie rod, the upper auxiliary tie rod represents the upper auxiliary back tie rod, the lower main tie rod represents the lower main back tie rod, and the lower auxiliary tie rod represents the lower auxiliary back tie rod. Based on this, an orthogonal experimental factor and level table as shown in Table 1 is designed.

[0048] Table 1. Factors and Levels in the Orthogonal Experiment

[0049] That is, the prestress range of the upper main back tie rod, upper auxiliary back tie rod, lower main back tie rod, and lower auxiliary tie rod is 60-100MPa.

[0050] In this example, the deformation of the mitered column in the Z-axis direction under both opening and closing conditions is studied. The difference between the maximum and minimum deformation is used as the relative deformation of the gate. The average of the relative deformations for the two conditions is calculated with a 1:1 weighting. The calculation results can serve not only as a comprehensive evaluation index of the gate's structural performance but also as a research object for range analysis.

[0051] Table 2L 25 (4 5 Orthogonal experimental design and results

[0052] The average value obtained from the synthesis was then used in the orthogonal experimental analysis.

[0053] In this example, to visually and intuitively observe the results of the orthogonal experiment, a range analysis was performed on the above average values. The analysis results are shown in Table 3 below.

[0054] Table 3 Range Analysis Table

[0055] The Kavg value is used to determine the optimal level. The smaller the Kavg, the smaller the deformation. Therefore, according to Table 3 of the range analysis, the optimal scheme for the prestressing of the tie rod is [4-1-2-1]. In order to make the commissioning benchmark adaptable to different operating conditions and facilitate the reasonable adjustment of prestress under various conditions, this study finally selected the prestressing commissioning benchmark for the lock miter gate tie rod as [4-1-2-1], that is: the prestressing of the upper main tie rod is 90 MPa, the prestressing of the upper auxiliary tie rod is 60 MPa, the prestressing of the lower main tie rod is 70 MPa, and the prestressing of the lower auxiliary tie rod is 60 MPa.

[0056] The specific embodiments of the present invention have been described in detail above, but these are merely one example, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A method for optimizing the prestressing adjustment of the back tie rod of a herringbone door based on orthogonal analysis, characterized in that, Includes the following steps: S1: Review the herringbone gate drawings, integrate the data, and use Creo software to create a 3D model of the herringbone gate; S2: Set the simulation parameters of the miter door under the conditions of opening, closing and hanging, and build a simulation model of the miter door; S3: Using ANSYS simulation software, the deformation of the miter gate under different back tie rod prestresses was calculated in the open, closed and suspended conditions. S4: Use the results of ANSYS simulation calculations to import SPSSAU for optimization analysis, and substitute the conclusions into ANSYS for verification analysis.

2. The method for optimizing the prestressing of the back tie rod of a herringbone door based on orthogonal analysis according to claim 1, characterized in that, S1 specifically includes: S1.1, Review the herringbone door drawings and measure the length, width, and height of the herringbone door; measure the dimensions and quantity of the main beam, crossbeam, main and auxiliary back tie rods, panel, rear flange plate, top pivot, bottom pivot, and diagonal joint column; S1.2 In Creo software, draw the main beam, crossbeam, main and auxiliary back tie rods, panel, rear flange plate, top pivot, bottom pivot, and diagonal column of the herringbone door. S1.3, array the drawn main beams and cross beams to reach the required number for the herringbone door; S1.4 Assemble the drawn herringbone door components.

3. The method for optimizing the prestressing of the back tie rod of a herringbone door based on orthogonal analysis according to claim 1, characterized in that, S2 specifically includes: S2.1 Calculate wind load. The pressure exerted by the wind on the gate is calculated using the following formula: ； In the formula: This is the basic wind pressure; It is the wind pressure shape coefficient; It is the wind pressure height variation coefficient; Because the gate operates at a certain angle, the wind pressure does not act perpendicularly on the gate. The formula for calculating the horizontal pressure exerted by the wind on the gate at this time is as follows: ； In the formula: h 1 represents the height of the gate; The size of the angle is equal to the opening angle of the gate, and it changes continuously as the gate rotates. The water depth at the highest design water level downstream; The width of the leaf; S2.2 When the miter gate is opened and closed, the load is calculated based on the force balance calculation, and the support reaction force of the top pivot is calculated. D x , D y The supporting reaction force of the bottom pivot R x , R y , R z For the unknowns, establish a system of equilibrium equations: ； In the formula: T It is the force of opening and closing; h 1 represents the height of the gate; h 2 is the maximum height difference between the downstream navigable water level and the threshold; h 3 is half the width of the gate; h 4 is the distance between the position of the push-pull rod and the top pivot; h 5 is the distance from the center point of the unsubmerged part of the gate to the bottom; It is the sum of the gate's weight and the vertical load on the working bridge; It is the pressure of the backwater; It is horizontal wind pressure; It is the angle formed by the push-pull rod and the door axis; S2.3, Calculate the friction torque of the top pivot and bottom pivot. The calculation formula is as follows: ； ； In the formula: f It is the coefficient of friction; D It is the support reaction force acting on the top pivot. ; d D It is the diameter of the top pivot; R It is the support reaction force acting on the bottom pivot. ; It is the bottom pivot friction radius. , r It is the radius of the spherical surface of the mushroom head at the bottom pivot; S2.4 sets the parameters of gravity, wind load, opening and closing force, water pressure, back tie rod prestress, mushroom head top and bottom pivot, support reaction force, and friction torque under opening, closing, and suspension conditions.

4. The method for optimizing the prestressing of the back tie rod of a herringbone door based on orthogonal analysis according to claim 3, characterized in that, In S2.1 Calculations were performed in accordance with the national standard GBJ9-87 "Code for Design of Structural Loads of Industrial and Civil Buildings". ,in V The annual average wind speed is the average wind speed of a certain region. The gate Take 1.3; According to national standards, the value should be 1.

00.

5. The method for optimizing the prestressing of the back tie rod of a herringbone door based on orthogonal analysis according to claim 3, characterized in that, In S2.3, considering wear, the coefficient of friction is taken as... f =0.

3.

6. The method for optimizing the prestressing of the back tie rod of a herringbone door based on orthogonal analysis according to claim 1, characterized in that, S3 specifically includes: S3.1 Import the 3D model of the herringbone gate into the ANSYS simulation software, and first assign structural dimensions and material properties to the herringbone gate; S3.2, further divide the herringbone gate into grids; S3.3, Set the parameter data calculated in S2.4 in ANSYS for different working conditions respectively; S3.4 Analyze whether the simulation results conform to the material properties.

7. The method for optimizing the prestressing of the back tie rod of a herringbone door based on orthogonal analysis according to claim 1, characterized in that, S4 specifically includes: S4.

1. The results of the ANSYS calculations are comprehensively analyzed to obtain a data table. The data table is then imported into SPSSAU for orthogonal analysis, which will produce an orthogonal experimental table and an orthogonal analysis result graph. S4.2, the obtained optimal combination is substituted into ANSYS simulation calculation for verification.

Images