A conveyor head tripod strength calculation system, method, and related apparatus

Abstract

The application discloses a conveyor head tripod strength calculation system and method and related equipment, which can be used for strength analysis and calculation of a conveyor head tripod. The application can quickly calculate stress nephograms and deformation nephograms of the conveyor head under different working conditions through parameterized modeling, mesh division and boundary load condition application of the conveyor head tripod model. The application can quickly complete strength analysis and calculation of the conveyor head tripod under different conveyor belt tensions, and is simple to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to computer technology, in particular to the conveyor head tripod strength determination technology in the coal industry field. BACKGROUND

[0002] The strength calculation of the head tripod is an important part of the overall design of the belt conveyor, which is mainly used for analyzing the stress of the head tripod under the action of the belt tension, and optimizing and improving the shape and structural size of the head tripod. When the belt conveyor starts to work, the belt tension on the conveyor will change over time, and the belt tension will reach a maximum value at some time. If the stress on the head tripod exceeds its structural yield strength, the reliability of the head tripod will be reduced, and the equipment will be damaged in the long run. Therefore, in the structural design, the strength of the head tripod must be studied and analyzed to ensure the long-term stable operation of the conveyor.

[0003] There are mainly two kinds of calculation and determination methods for the strength of the head tripod:

[0004] The first method is to use the classical mechanics formula to deduce and calculate, and to equivalent the head tripod into a cantilever beam to calculate the average stress of each key position of the tripod. Since the model is simplified too much in the calculation, the calculated value is relatively conservative, and the true stress of the key point and the true stress at the round corner cannot be calculated.

[0005] The second method is to model by using three-dimensional software, to divide the grid by the pre-processing software, and finally to import into the finite element software for calculation. This method can accurately calculate the stress of the head tripod at each position, but it takes a lot of time to re-model and draw the grid every time the thickness of the rib plate is changed or the position of the reinforcing rib is adjusted, which is prone to operation errors. More importantly, the model and grid processing methods of different researchers in the calculation will also be different, so that the calculation results have certain deviation. SUMMARY

[0006] In view of the problems of poor accuracy and complex operation of the existing head tripod strength determination scheme, the purpose of the present application is to provide a conveyor head tripod strength calculation scheme which can quickly and accurately complete the strength analysis and calculation of the conveyor head tripod under different belt tensions, and is simple to operate.

[0007] In order to achieve the above purpose, the present application provides a conveyor head tripod strength calculation system, which comprises:

[0008] A load calculation module for calculating the load of the belt tension applied to the head tripod;

[0009] The parameter acquisition module acquires at least the unit type and material attribute parameter of the head tripod, the stand size parameter, the inclined frame size parameter, and the load of the conveying belt tension applied to the head tripod calculated by the load calculation module;

[0010] The calculation module automatically generates a corresponding geometric model according to the parameters acquired by the parameter acquisition module, sets a global volume size for generating a finite element grid, performs finite element grid division on the geometric structure of the tripod by using a free division mode, adds constraints and loads to the generated finite element model, and finally sets a load step to calculate the strength of the conveyor head tripod.

[0011] Further, the calculation module includes a geometric modeling submodule, a finite element modeling submodule, a boundary condition construction submodule, and a calculation processing submodule,

[0012] The geometric modeling submodule automatically generates a corresponding geometric model according to the parameters acquired by the parameter acquisition module;

[0013] The finite element modeling submodule performs finite element grid division according to the geometric model in the geometric modeling submodule. The finite element modeling here equivalently models the actual structure model by dividing the structure into individual unit models. By setting the global volume size of the finite element model and the free division method, the geometric model is automatically divided into a finite element model. The finite element model should include all the features of the geometric model and be consistent with the geometric model, so as to ensure the accuracy of the solution;

[0014] The boundary condition construction submodule is established on the finite element modeling submodule. By using the direct displacement constraint method, referring to the actual installation conditions of the tripod, full constraints are applied to the bottom surface of the tripod bottom plate finite element model, i.e., the ground under the bottom plate is not allowed to move. Referring to the actual stress of the tripod, loads are applied to the corresponding stress points. Only in this way can the results of the solution meet the actual situation;

[0015] The calculation processing submodule uses a statics module solver to set the required load step on the basis of the boundary condition submodule, and finally performs the solution.

[0016] Further, the geometric modeling submodule first completes the establishment of the stand model and the inclined frame model.

[0017] On the basis of the established stand model, bottom plate modeling, vertical plate modeling, horizontal plate modeling, and top reinforcement plate modeling are sequentially performed. On the basis of the established inclined frame model, bottom plate modeling, inclined plate modeling, horizontal plate modeling, and top reinforcement plate modeling are sequentially performed. On this basis, the geometric model of the inclined frame model except the bottom plate is rotated.

[0018] Then, respectively, with the inclined frame model bottom plate bottom surface and the right vertical plate end face in the vertical frame model as the reference, Boolean operation difference is carried out;

[0019] Finally, the overall model is subjected to Boolean operation summation.

[0020] Further, the finite element modeling submodule discretizes the geometric model into individual finite element units by setting the global volume size of the finite element model and the free division method, each unit has a simple form (such as hexahedron or tetrahedron), by solving the displacement of the nodes on each unit, finally the results of the entire model are combined.

[0021] Further, the boundary condition construction submodule adopts a direct displacement constraint method, sets according to the actual installation conditions of the tripod, applies full constraints on the bottom surface of the tripod bottom plate, that is, all degrees of freedom of the ground of the bottom plate are 0, and according to the actual stress condition of the tripod, loads are applied at the corresponding stress positions.

[0022] Further, the calculation processing submodule, according to the idea of discrete elements in finite element, after dividing the geometric structure into individual finite element units, solves the displacement of each unit, and finally integrates the overall stress and displacement under the premise of ensuring the geometric compatibility between units.

[0023] In order to achieve the above purpose, the application provides a conveyor head tripod strength calculation method, comprising:

[0024] The load of the conveyor belt tension applied to the head tripod is calculated.

[0025] Obtain the unit type and material attribute parameters, the vertical frame size parameters, and the inclined frame size parameters of the conveyor head tripod.

[0026] According to the parameters obtained by the parameter acquisition module, corresponding geometric models are generated; the global volume size of the generated finite element grid is set, and the free division mode is adopted to divide the finite element grid of the tripod geometric structure; then, constraints and loads are added to the generated finite element model; finally, the set load step is calculated to obtain the strength of the conveyor head tripod.

[0027] Further, the method further comprises the following steps when calculating according to the obtained parameters:

[0028] According to the obtained parameters, a parameterizable head tripod strength calculation model is used to automatically generate corresponding geometric models.

[0029] The finite element model is established, the finite element mesh is divided according to the geometric model in the geometric modeling submodule, the finite element modeling is to divide the structure into a plurality of unit models to equivalent the actual structure model, the global volume size of the finite element model is set and the free division method is set, the geometric model is automatically divided into the finite element model, the finite element model should contain all the geometric model features, and the geometric model is consistent, so as to guarantee the accuracy of solving;

[0030] The boundary condition is established on the finite element modeling submodule, the direct displacement constraint method is used, the actual installation working condition of the tripod is referred to, full constraints are applied to the bottom surface of the tripod bottom plate finite element model, that is, the ground of the bottom plate is not allowed to move, the actual stress of the tripod is referred to, and loads are applied to the corresponding stress, so that the result obtained by solving meets the actual situation;

[0031] The solving calculation is performed on the basis of the boundary condition submodule, the statics module solver is used, the load step required for calculation is set, and finally the solving is performed.

[0032] Further, when the geometric model is established, first, the stand model and the inclined model are established;

[0033] On the basis of the established stand model, the bottom plate modeling, the vertical plate modeling, the horizontal plate modeling and the top reinforcing rib plate modeling are sequentially performed; on the basis of the established inclined model, the bottom plate modeling, the inclined plate modeling, the horizontal plate modeling and the top reinforcing rib plate modeling are sequentially performed; and on this basis, the geometric model of the bottom plate in the inclined model is rotated;

[0034] Then, the bottom surface of the bottom plate of the inclined model and the end surface of the right vertical plate in the stand model are taken as the reference to perform the Boolean operation difference;

[0035] Finally, the Boolean operation sum of the overall model is performed.

[0036] Further, when the finite element modeling is constructed, the global volume size of the finite element model is set and the free division method is set, the geometric model is discretized into a plurality of finite element units, each unit has a simple form (such as hexahedron or tetrahedron), the displacement of each node on each unit is solved, and finally the results of the entire model are combined.

[0037] Further, when the solving calculation is performed, according to the idea of discrete elements in the finite element, after the geometric structure is divided into a plurality of finite element units, the displacement of each unit is solved, the geometric compatibility between units is ensured, and finally the overall stress and displacement are integrated.

[0038] In order to achieve the above purpose, the application provides a computer readable storage medium, which stores a program, and the program is executed by a processor to realize the steps of the conveyor head tripod strength calculation method.

[0039] To achieve the above object, the present application provides a processor for running a program, which performs the steps of the conveyor head tripod strength calculation method when running.

[0040] To achieve the above object, the present application provides a terminal device, which comprises a processor, a memory and a program stored on the memory and executable on the processor, and the program code is loaded and executed by the processor to implement the steps of the conveyor head tripod strength calculation method.

[0041] To achieve the above object, the present application provides a computer program product, which is adapted to perform the steps of the conveyor head tripod strength calculation method when executed on a data processing device.

[0042] The present application provides a scheme that obtains the equivalent stress of each position of the head tripod through finite element statics analysis calculation, thereby effectively overcoming the shortcomings of the prior art.

[0043] The scheme provided by the present application realizes automatic calculation of the corresponding results by secondary development, i.e. by inputting the corresponding size of the structure, realizes the calculation of the head tripod strength, is simple to operate, realizes the standardization of the calculation method and process, avoids the human error caused by different analysts, significantly shortens the calculation time and improves the calculation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0044] The present application will be further described below in combination with the drawings and specific embodiments.

[0045] Figure 1 The present application provides a geometric modeling flowchart for the calculation of the conveyor head tripod strength;

[0046] Figure 2 The present application provides a finite element model establishment, boundary condition and solution flowchart for the calculation of the conveyor head tripod strength;

[0047] Figure 3 The present application provides a three-dimensional finite element model diagram of the head tripod constructed in the example;

[0048] Figure 4 The present application provides an equivalent stress nephogram of the head tripod calculated in the example;

[0049] Figure 5 The present application provides a displacement deformation nephogram calculated in the example. DETAILED DESCRIPTION

[0050] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific drawings.

[0051] The present application realizes the stress nephogram and the deformation nephogram of the conveyor head under different working conditions by parameterized modeling, meshing and boundary load condition imposing of the conveyor head tripod model, thereby realizing the calculation and analysis of the strength of the conveyor head tripod.

[0052] Accordingly, the present application provides a conveyor head tripod strength calculation method, which mainly includes:

[0053] (S1) calculating the load of the conveyor belt tension applied to the head tripod, thereby decomposing the resultant force generated by the conveyor belt tension into horizontal and vertical directions;

[0054] (S2) obtaining the unit type and material attribute parameters, the stand size parameters and the inclined rack size parameters of the conveyor head tripod;

[0055] (S3) automatically generating the corresponding geometric model by using the parameterizable head tripod strength calculation module according to the parameters obtained by the parameter acquisition module; then setting the global volume size of the generated finite element mesh, and using the free division mode to divide the finite element mesh of the tripod geometric structure; then adding constraints and loads to the generated finite element model; finally, setting the load step to calculate the strength of the conveyor head tripod.

[0056] It should be noted that the present application is implemented in step (S3), which is mainly realized by the cooperation of the geometric modeling, finite element model establishment, boundary condition establishment and solving.

[0057] In the geometric modeling, the corresponding geometric model is generated by using the parameterizable head tripod strength calculation model according to the parameters obtained by the parameter acquisition module.

[0058] As an example, when the geometric model is established, the stand model and the inclined rack model are first established.

[0059] On the basis of the established stand model, the bottom plate modeling, the vertical plate modeling, the horizontal plate modeling and the top reinforcing rib plate modeling are sequentially performed; on the basis of the established inclined rack model, the bottom plate modeling, the inclined plate modeling, the horizontal plate modeling and the top reinforcing rib plate modeling are sequentially performed; and on this basis, the model rotation is performed on the geometric model of the inclined rack except the bottom plate.

[0060] Then, the Boolean operation difference is performed with the bottom surface of the inclined rack model bottom plate and the right vertical plate end surface of the stand model as the reference.

[0061] Finally, the overall model is summed up by Boolean operation, and the tripod geometric model is finally established through a series of ways.

[0062] In the establishment of the finite element model, the geometric model in the geometric modeling submodule is divided into finite element grids. The finite element modeling here is to divide the structure into individual unit models to equivalent the actual structure model. By setting the global volume size of the finite element model and the free division method, the geometric model is automatically divided into a finite element model. The finite element model should contain all the features of the geometric model and be consistent with the geometric model, so as to ensure the accuracy of the solution. By setting the global volume size of the finite element model and the free division method, the software will automatically complete the grid discretization.

[0063] The boundary conditions are established in the finite element modeling submodule. By using the direct displacement constraint method, referring to the actual installation conditions of the tripod, full constraints are applied to the bottom surface of the tripod bottom plate finite element model, i.e. the ground under the bottom plate is not allowed to move. Referring to the actual stress of the tripod, loads are applied at the corresponding stress points. Only in this way can the results obtained by solving meet the actual situation.

[0064] In the solution calculation, according to the mechanism of discrete elements in finite elements, after the geometric structure is divided into individual finite element units, the displacement of each unit is solved, and the overall stress and displacement are finally integrated under the premise of ensuring the geometric compatibility between units.

[0065] In the specific solution calculation, the statics module solver is used based on the boundary condition submodule to set the required load step for calculation, and finally the solution is performed.

[0066] The implementation process of the foregoing conveyor head tripod strength calculation and analysis scheme is specifically described as follows.

[0067] Referring to Figure 1 and Figure 2 , the parameterized modeling and calculation process of the conveyor head tripod strength provided by the present application mainly includes the following steps:

[0068] Step 1: Calculate the load applied to the head tripod by the conveyor belt tension by using the classical formula.

[0069] The horizontal component of the load calculated in this step is , and the vertical component is ;

[0070] In the formula, is the tension at the approach point of the conveyor belt, is the tension at the departure point of the conveyor belt, is the angle between the conveyor belt and the horizontal direction, is the angle between the conveyor belt and the horizontal direction.

[0071] Step 2, get the following parameters:

[0072] The unit type and material properties of the head tripod;

[0073] The size parameters of the stand: steel plate thickness LGH, bottom plate length LDC, bottom plate width LDK, vertical plate length LSC, distance between two vertical plates LSJ, distance between reinforcing rib plates JQJ, and number of reinforcing rib plates JQG;

[0074] The size parameters of the inclined frame: bottom plate length XDC, inclination angle of inclined plate XD, longest inclined plate length XXC, reinforcing rib plate length XQC, distance between reinforcing rib plates XQJ, number of reinforcing rib plates XQG, and horizontal distance DLJ between the bottom rib plate and the stand bottom plate;

[0075] And the load applied to the head tripod by the conveyor belt tension calculated in step 1 And .

[0076] As an example, in the specific implementation, the parameterized head tripod strength calculation program based on the present scheme can be opened in a text editor, the unit type and material properties of the head tripod are set, the structure size parameters of the head tripod are input, and the load applied to the head tripod by the conveyor belt tension calculated in step 1 is input.

[0077] Specifically as follows:

[0078] Step 2.1, the head tripod is mainly composed of a block of steel plate, according to design experience, the thickness of each steel plate is the same, and the steel plate thickness LGH is input;

[0079] Step 2.2, the stand bottom plate length LDC and width LDK are input;

[0080] Step 2.3, the stand vertical plate length LSC is input;

[0081] Step 2.4, the distance between two vertical plates LSJ is input;

[0082] Step 2.5, the distance between reinforcing rib plates JQJ and the number of reinforcing rib plates JQG are input;

[0083] Step 2.6, the inclined frame bottom plate length XDC is input;

[0084] Step 2.7, the horizontal distance DLJ between the inclined frame bottom plate and the stand bottom plate is input;

[0085] Step 2.8, the longest inclined plate length XXC on the inclined frame is input;

[0086] Step 2.9, the reinforcing rib plate length XQC is input;

[0087] Step 2.10, input the angle of the inclined plate XD;

[0088] Step 2.11, input the distance XQJ and the number XQG of the reinforcing rib plate of the inclined rack;

[0089] Step 2.12, input the load S1 and S2 of the head tripod applied by the belt tension calculated in step 1, and then calculate the size of the decomposed force in two directions.

[0090] Step 3, according to the unit type and material properties set in step 2, the input related structure size and boundary condition parameters, automatically complete the corresponding geometric model establishment (such as Figure 1 shown) ;

[0091] Further set the corresponding global grid size, and use the free division algorithm to divide the grid of the structure, and disperse the geometric model into a finite element model;

[0092] Then apply full constraints to the bottom surface of the finite element model bottom plate, and apply the load and calculated in step 1 to the side surface of the stand to apply the load of the head tripod to the belt tension;

[0093] Finally, in order to ensure that the simulation result can converge, set the load step, that is, gradually apply the load in step 3 to solve, and automatically output the equivalent stress nephogram and displacement deformation nephogram of the head tripod after calculation.

[0094] As an example, this step can be implemented by the following step scheme in specific implementation:

[0095] Step 3.1, the head tripod is welded by multiple steel plates, and the shape of the steel plate is a cuboid. According to the input structure size parameters of the stand bottom plate, the blc4 command in ANSYS APDL is called to establish the stand bottom plate model with the coordinate origin as the starting point. The blc4 command only needs to input the starting point coordinates, length, width and thickness to generate the corresponding cuboid structure with the starting point as the starting point, that is, blc4, 0, 0, LDC, LDK, LGH;

[0096] Step 3.2, the vertical plate of the stand is established symmetrically on the bottom plate. According to the distance between the two vertical plates and the length of the bottom plate, the starting point position of one side of the vertical plate is calculated, that is, the half length of the bottom plate minus half of the distance between the vertical plates, and then minus the thickness of the vertical plate, that is, the horizontal distance of the vertical plate relative to the coordinate origin:

[0097] LSJ1=LDC / 2-LSJ / 2-LGH,

[0098] Wherein, the distance in the vertical direction is the thickness of the bottom plate, according to which the starting position of the vertical plate is determined, the width of the vertical plate is consistent with the width of the bottom plate, and then the blc4 command is called to complete the modeling of the vertical plate model, i.e. blc4, LSJ1, LGH, LSC, LDK, LGH;

[0099] Step 3.3, according to the interval of the two vertical plates, the modeling of another vertical plate is completed through the array command;

[0100] Step 3.4, the length of the middle horizontal plate is consistent with the length of the vertical plate, and the width is the interval of the two vertical plates, the working plane is moved to the bottom plate width direction by LDK / 2 distance, and the blc4 command is called to complete the modeling of the vertical plate model, i.e. blc4, LSJ1, LGH, LSC, LSJ, LGH;

[0101] Step 3.5, the working plane is restored to the initial origin, and the working plane is moved to the vertical plate length direction by LSC distance, the vertical plate top point is taken as the origin, the length is the interval of the two vertical plates, and the width is consistent with the width of the bottom plate, and the blc4 command is called to complete the modeling of the top reinforcing rib plate, i.e. blc4, 0, LSC, LSJ, LDK, LGH, and finally the volume number JK1 of the top reinforcing rib plate is returned;

[0102] Step 3.6, the vgen array command is called to array in the vertical plate length direction, and the modeling of the reinforcing rib plate on the stand is completed, i.e. vgen, JQG, JK1, JQJ;

[0103] Step 3.7, the working plane is restored to the initial origin, and since the width of the bottom plate on the inclined rack is also consistent with the width of the stand bottom plate, the blc4 command is called to complete the modeling of the inclined rack bottom plate, i.e. blc4, DLJ, 0, XDC, LDK, LGH;

[0104] Step 3.8, refer to step 3.2, complete the modeling of the two vertical plates of the inclined rack, and the distance of the starting point relative to the origin is:

[0105] LSJ2=DLJ+((XDC-XQC) / 2-LGH);

[0106] The blc4 command is called to complete the modeling of the vertical plate model, i.e. blc4, LSJ2, LGH, XXC, LDK, LGH; and the other vertical plate is modeled through array;

[0107] Step 3.9, refer to step 3.3, complete the modeling of the horizontal plate between the two vertical plates, i.e. blc4, LSJ2, LGH, XXC, XQC, LGH;

[0108] Step 3.10, referring to step 3.5, the modeling of the inclined frame reinforcing rib plate is completed, the modeling of the top reinforcing rib plate is completed first, and the volume number JK2 is obtained, then the vgen array command is called to array in the length direction of the vertical plate, and the modeling of the reinforcing rib plate on the inclined frame is completed, that is, vgen, XQG, JK2, XQJ;

[0109] Step 3.11, select the geometric model of the inclined frame except the bottom plate, and rotate the angle XD by calling the vgen command, that is, the originally vertical model is tilted, which prepares for subsequent inclined frame modeling;

[0110] Step 3.12, respectively, the bottom surface of the inclined frame bottom plate and the end surface of the right vertical plate in the stand are taken as the reference to perform Boolean operation difference, thereby deleting the redundant body generated by rotation;

[0111] Step 3.13, select all bodies, and perform Boolean operation sum on the whole model to eliminate the interference part.

[0112] Accordingly, the geometric model is established, and the following continues the foregoing steps to complete the finite element model establishment, boundary condition and solution.

[0113] Step 3.14, when the geometric model of the head triangular stand and the inclined frame is established, the finite element mesh is divided according to the related mesh size and mesh type, and the free division method is used to divide the geometric model structure, so as to discrete the geometric model into a finite element model;

[0114] Step 3.15, since the geometric model of the head triangular stand is already a whole, it is not necessary to establish a contact pair, only displacement constraints need to be established on the bottom surface of the stand and the inclined frame bottom plate, and corresponding loads are added to the installation surface of the drum bearing seat on the stand.

[0115] Step 3.16, set the load step solution.

[0116] Step 3.17, complete the calculation and solution, and output the equivalent stress nephogram and displacement deformation nephogram of the head triangular stand.

[0117] The parameterized modeling calculation method of the conveyor head triangular stand strength provided by the application can be presented in a corresponding software program when it is specifically implemented. For example, a corresponding parameterized modeling calculation system of the conveyor head triangular stand strength is formed based on the corresponding software program, and the software can realize the aforementioned parameterized modeling calculation process of the conveyor head triangular stand strength when it is called.

[0118] As an example, the parameterized modeling calculation system of the conveyor head triangular stand strength mainly includes a load calculation module, a parameter acquisition module and a calculation module.

[0119] The load calculation module in the system is configured to calculate the load of the conveyor belt tension applied to the head tripod;

[0120] The parameter acquisition module in the system is configured to acquire at least the unit type and material attribute parameters of the head tripod, the stand size parameters, the inclined frame size parameters, and the load of the conveyor belt tension applied to the head tripod calculated by the load calculation module;

[0121] The calculation module in the system is configured to automatically generate a corresponding geometric model according to the parameters acquired by the parameter acquisition module, set a global volume size for generating a finite element mesh, divide the geometric structure of the tripod by using a free division mode, add constraints and loads to the finite element model, and finally calculate the strength of the conveyor head tripod by setting a load step.

[0122] The load calculation module in the system is configured to implement the function of step 1.

[0123] The parameter acquisition module in the system is configured to implement the function of step 2.

[0124] The calculation module in the system is configured to implement the function of step 3.

[0125] The geometric modeling submodule is configured to automatically generate a corresponding geometric model according to the parameters acquired by the parameter acquisition module.

[0126] The finite element modeling submodule is configured to divide the geometric model in the geometric modeling submodule into a finite element mesh. The finite element modeling is to divide a structure into individual unit models to equivalently represent the actual structure model. By setting a global volume size and a free division method for the finite element model, the geometric model is automatically divided into a finite element model. The finite element model should include all the features of the geometric model and be consistent with the geometric model, so as to ensure the accuracy of the solution.

[0127] The geometric modeling submodule is configured to first complete the establishment of a stand model and an inclined frame model.

[0128] On the basis of the established stand model, bottom plate modeling, vertical plate modeling, horizontal plate modeling, and top reinforcing rib plate modeling are sequentially performed. On the basis of the established inclined frame model, bottom plate modeling, inclined plate modeling, horizontal plate modeling, and top reinforcing rib plate modeling are sequentially performed. On this basis, the geometric model of the inclined frame model except the bottom plate is rotated.

[0129] Then, Boolean operation difference is performed with the bottom surface of the inclined frame model bottom plate and the end surface of the right vertical plate in the stand model as the reference.

[0130] Finally, the overall model is subjected to Boolean operation summation.

[0131] For the boundary condition construction submodule in the present calculation module, a direct displacement constraint method is used, and full constraints are applied to the bottom surface of the tripod bottom plate finite element model according to the actual installation conditions of the tripod, i.e. the ground under the bottom plate is not allowed to move, and loads are applied at the corresponding stress positions according to the actual stress conditions of the tripod, so that the results obtained by solving meet the actual conditions.

[0132] For the calculation processing submodule in the present calculation module, according to the principle of discrete elements in finite elements, after the geometric structure is divided into individual finite element units, the displacement of each unit is solved, and the overall stress and displacement are finally integrated under the premise of ensuring geometric compatibility between units.

[0133] Specifically, the calculation processing submodule is implemented on the basis of the boundary condition submodule, a statics module solver is used to set the required load step for calculation, and finally the calculation is performed.

[0134] The parameterized modeling and calculation system for the strength of the conveyor head tripod formed accordingly can be used in cooperation with the ANSYS software, by calling the ANSYS software, the parameterized modeling and calculation system for the strength of the conveyor head tripod is loaded, and automatic modeling, mesh division, boundary addition, solution calculation and post-processing can be completed.

[0135] The implementation process of the parameterized modeling and calculation of the strength of the conveyor head tripod provided by the present application is further described below through a specific application example.

[0136] Referring to Figure 3 , which shows a three-dimensional finite element model schematic diagram of a certain conveyor head tripod. The conveyor head tripod in this example is taken as the calculation and analysis object.

[0137] In this example, a parameterized modeling and calculation system for the strength of the conveyor head tripod is constructed based on the scheme provided by the present application, and the system is used in cooperation with the ANSYS software to realize the calling of the system through the ANSYS software.

[0138] On the basis of the above, the present example is aimed at Figure 3 The specific steps for the strength calculation and analysis of the conveyor head tripod shown in

[0139] First step: calculate the load applied to the head tripod by the conveyor belt tension through the classical formula, the approach point tension S1 of the conveyor belt is 416KN, the departure point tension S2 of the conveyor belt is 52KN, the included angle between the conveyor belt and the horizontal direction is 5°, the included angle between the conveyor belt and the horizontal direction is 25°, so the horizontal component force can be calculated For 461 KN, vertical component For 14 KN.

[0140] Step 2: Open the text editor and input the following structural parameters into the parametric modeling system for the strength of the conveyor head tripod:

[0141] A) Unit and material property settings:

[0142] The unit type for the head tripod is SOLID186 with 6 faces and 20 nodes, the material property is structural steel, the elastic modulus is 2.1E5 MPa, the Poisson's ratio is 0.3, and the density is 7.85E-9 ton / mm^3.

[0143] B) Structural parameter settings for the stand and inclined frame:

[0144] The parameter size of the stand: the thickness of the steel plate is 20 mm, the height of the vertical plate is 2810 mm, the length of the bottom plate is 700 mm, the width of the bottom plate is 230 mm, the distance between the two vertical plates is 600 mm, the distance between the reinforcing rib plates is 400 mm, and the number of reinforcing rib plates is 5.

[0145] The parameter size of the inclined frame: the thickness of the steel plate is 20 mm, the inclination angle of the inclined plate is 48°, the length of the largest steel plate is 3751 mm, the length of the reinforcing rib plate is 410 mm, the distance between the reinforcing rib plates is 1120 mm, the number of reinforcing rib plates is 3, the length of the bottom plate is 660 mm, the width of the bottom plate is 230 mm, and the horizontal distance between the bottom rib plate and the bottom plate of the stand is 2472 mm.

[0146] C) Load input:

[0147] The horizontal component of the force applied to the head tripod is 461 KN, and the vertical component is 14 KN.

[0148] Step 3: Open the ANSYS software and import the parametric modeling system for the strength of the conveyor head tripod. Based on the parameters input in the text editor, the system can automatically model, mesh, add boundaries and constraints, and perform calculations.

[0149] Step 4: After the system runs, it will save the equivalent stress cloud map and displacement cloud map of the head tripod in jpg format in the working directory of ANSYS, such as Figure 4 and Figure 5 .

[0150] It can be known from the above examples that the parameterized modeling calculation scheme of the conveyor head tripod strength provided by the application can effectively overcome the shortcomings of the prior art, can quickly complete the strength analysis and calculation of the conveyor head tripod under different conveyor belt tensions, is simple to operate, realizes the standardization of the calculation method and process, avoids the result errors in the calculation of different researchers, greatly reduces the calculation period, and reduces the design cost to a certain extent.

[0151] Finally,

[0152] The embodiment of the application further provides a computer readable storage medium, which has a program stored thereon, and the program is executed by a processor to implement the steps of the parameterized modeling calculation method of the conveyor head tripod strength provided by the application.

[0153] The embodiment of the application further provides a processor, which is used for running a program, wherein the program is executed to implement the steps of the parameterized modeling calculation method of the conveyor head tripod strength provided by the application.

[0154] The embodiment of the application further provides a terminal device, which comprises a processor, a memory, and a program stored in the memory and capable of being run on the processor, and the program code is loaded and executed by the processor to implement the steps of the parameterized modeling calculation method of the conveyor head tripod strength provided by the application.

[0155] The application further provides a computer program product, which is adapted to execute the steps of the parameterized modeling calculation method of the conveyor head tripod strength provided by the application when executed on a data processing device.

[0156] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0157] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the system, device and module described above can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0158] Those skilled in the art can understand that the embodiments of the application can be provided as a method, a system or a computer program product. Therefore, the application can adopt a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the application can adopt the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0159] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0160] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0161] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof. Figure 1 one or more flowcharts and / or blocks in the flowcharts and / or combination thereof.

[0162] In one typical configuration, the computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0163] The memory can include non-persistent memory and / or volatile memory, such as a random access memory (RAM) including a cache area for the temporary storage of data. The memory can also include non-volatile memory, such as read only memory (ROM) for storing structural information and / or instruction code to boot an operating system. The memory can also include solid state non-volatile memory (e.g., flash memory), disk drives, disk arrays, optical storage devices, tape storage devices, etc.

[0164] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0165] It should also be noted that the terms "comprising", "comprising" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or device that includes the element.

[0166] Those skilled in the art will appreciate that embodiments of the present application can be provided as methods, systems or computer program products. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0167] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A conveyor head tripod strength calculation system, characterized by, The system comprises: a load calculation module for calculating the load of the conveyor belt tension applied to the head tripod; a parameter acquisition module for acquiring at least the unit type and material attribute parameters of the head tripod, the size parameters of the vertical stand, the size parameters of the inclined stand, and the load of the conveyor belt tension applied to the head tripod calculated by the load calculation module; the size parameters of the vertical stand include the thickness LGH of the steel plate, the length LDC of the bottom plate, the width LDK of the bottom plate, the length LSC of the vertical plate, the distance LSJ between the two vertical plates, the distance JQJ between the reinforcing ribs, and the number JQG of the reinforcing ribs; a calculation module for automatically generating the corresponding geometric model according to the parameters acquired by the parameter acquisition module, setting the global volume size for generating the finite element grid, and dividing the finite element grid for the geometric structure of the tripod by using the free division mode; then, constraints and loads are added to the finite element model; finally, the strength of the head tripod of the conveyor is calculated by setting the load step, and the calculation module is configured to be able to establish the structure above the bottom plate in the vertical stand vertical plate symmetry, calculate the starting point position of one side vertical plate according to the distance between the two vertical plates and the length of the bottom plate, that is, half the length of the bottom plate minus half the distance between the vertical plates, and then minus the thickness of the vertical plate, that is, the horizontal distance of the vertical plate relative to the coordinate origin, and the distance in the vertical direction is the thickness of the bottom plate, according to which the starting point position of the vertical plate is determined, the width of the vertical plate is consistent with the width of the bottom plate, and the modeling of the vertical plate model is completed by calling the blc4 command, that is, blc4, LSJ1, LGH, LSC, LDK, LGH. The calculation module comprises a geometric modeling submodule, a finite element modeling submodule, a boundary condition construction submodule, and a calculation processing submodule, The geometric modeling submodule automatically generates the corresponding geometric model according to the parameters acquired by the parameter acquisition module; 2. The conveyor head tripod strength calculation system of claim 1, wherein, The finite element modeling submodule performs finite element grid division according to the geometric model in the geometric modeling submodule; The boundary condition construction submodule is established on the finite element modeling submodule, and full constraints are applied to the bottom surface of the finite element model of the tripod bottom plate by using the direct displacement constraint method according to the actual installation working condition of the tripod; The calculation processing submodule uses the statics module solver to set the required load step for calculation, and finally performs solving on the basis of the boundary condition submodule. The geometric modeling submodule first completes the establishment of the vertical stand model and the inclined stand model; and then sequentially performs bottom plate modeling, vertical plate modeling, horizontal plate modeling, and top reinforcing rib modeling on the basis of the established vertical stand model; 3. The conveyor head tripod strength calculation system of claim 2, wherein, and then sequentially performs bottom plate modeling, inclined plate modeling, horizontal plate modeling, and top reinforcing rib modeling on the basis of the established inclined stand model; then, the model is rotated based on the geometric model of the bottom plate of the inclined stand; then, Boolean operation difference is performed based on the bottom surface of the bottom plate of the inclined stand model and the end surface of the right vertical plate of the vertical stand model; finally, Boolean operation summation is performed on the overall model. ​ ​ 4. The conveyor head tripod strength calculation system of claim 2, wherein, The finite element modeling submodule discretizes the geometric model into a plurality of finite element units by setting the global volume size of the finite element model and the free division mode, each unit has a simple form, by solving the displacement of the nodes on each unit, finally combining to form the results of the whole model.

5. The conveyor head tripod strength calculation system of claim 2, wherein, The calculation processing submodule, according to the principle of discrete elements in finite elements, after dividing the geometric structure into a plurality of finite element units, solves the displacement of each unit, and finally integrates the overall stress and displacement under the premise of ensuring the geometric compatibility between the units.

6. A conveyor head tripod strength calculation method, characterized by, The calculation method is composed of the following steps: Step S1: calculate the load of the conveyor belt tension applied to the head tripod, to decompose the resultant force generated by the conveyor belt tension into horizontal and vertical directions; Step S2: obtain the unit type and material attribute parameters of the conveyor head tripod, the size parameters of the stand, the size parameters of the inclined frame, and the load of the conveyor belt tension applied to the head tripod calculated; the size parameters of the stand: steel plate thickness LGH, bottom plate length LDC, bottom plate width LDK, vertical plate length LSC, distance between two vertical plates LSJ, reinforcing rib plate spacing JQJ, and reinforcing rib plate number JQG; the size parameters of the inclined frame: bottom plate length XDC, inclined plate inclination angle XD, longest inclined plate length XXC, reinforcing rib plate length XQC, reinforcing rib plate spacing XQJ, reinforcing rib plate number XQG, and horizontal distance DLJ between the bottom rib plate and the stand bottom plate; Step S3: generate the corresponding geometric model according to the parameters obtained by the parameter acquisition module, set the global volume size for generating the finite element grid, and divide the finite element grid for the geometric structure of the tripod in free division mode; then add constraints and loads to the generated finite element model; finally, set the load step to calculate the strength of the conveyor head tripod, and establish the vertical plate symmetrically on the bottom plate according to the distance between the two vertical plates and the length of the bottom plate, calculate the starting point position of one side vertical plate, which is half the length of the bottom plate minus half the distance between the vertical plates, and then minus the thickness of the vertical plate, that is, the horizontal distance of the vertical plate relative to the coordinate origin; LSJ1=LDC / 2-LSJ / 2-LGH, wherein the distance in the vertical direction is the thickness of the bottom plate, and the starting point position of the vertical plate is determined accordingly, the width of the vertical plate is consistent with the width of the bottom plate, and the vertical plate model is completed by calling the blc4 command, that is, blc4, LSJ1, LGH, LSC, LDK, LGH.

7. The conveyor head tripod strength calculation method of claim 6, wherein, When the method calculates according to the obtained parameters, it includes: According to the obtained parameters, a parameterizable head tripod strength calculation model is used to automatically generate a corresponding geometric model; Establish a finite element model, and divide the finite element grid according to the geometric model in the geometric modeling submodule; Establish boundary conditions on the finite element modeling submodule, and apply full constraints to the bottom surface of the finite element model of the tripod bottom plate by the direct displacement constraint method according to the actual installation conditions of the tripod; Solve the calculation, and set the required load step by using the statics module solver based on the boundary condition submodule, and finally solve it.

8. The conveyor head tripod strength calculation method of claim 7, wherein, The method, when establishing a geometric model, first completes the establishment of an upright frame model and an inclined frame model; And on the basis of the established upright frame model, sequentially perform bottom plate modeling, vertical plate modeling, horizontal plate modeling, and top reinforcing rib plate modeling; On the basis of the established inclined frame model, sequentially perform bottom plate modeling, inclined plate modeling, horizontal plate modeling, and top reinforcing rib plate modeling; On this basis, the geometric model of the bottom plate in the inclined frame is rotated; Then, respectively take the bottom surface of the bottom plate of the inclined frame model and the end surface of the right vertical plate in the upright frame model as the reference to perform Boolean operation difference; Finally, perform Boolean operation summation on the overall model.

9. The conveyor head tripod strength calculation method of claim 7, wherein, The method, when constructing a finite element model, discretizes the geometric model into individual finite element units by setting the global volume size of the finite element model and the free division method, each unit has a simple form, by solving the displacement of the nodes on each unit, finally combining to form the results of the entire model.

10. The conveyor head tripod strength calculation method of claim 7, wherein, The method, when solving and calculating, according to the mechanism of discrete elements in finite elements, after dividing the geometric structure into a plurality of finite element units, the displacement of each unit is solved, and finally the overall stress and displacement are integrated under the premise of ensuring the geometric compatibility between the units.

11. A computer-readable storage medium having stored thereon a program, characterized in that, The program, when executed by the processor, implements the steps of the conveyor head tripod strength calculation method of any one of claims 6-10.

12. A processor for running a program, the processor comprising: The program, when executed, performs the steps of the conveyor head tripod strength calculation method of any one of claims 6-10.

13. A terminal device, the device comprising a processor, a memory, and a program stored on the memory and executable on the processor, wherein the program comprises instructions for causing the processor to perform the method of any one of claims 1 to 12. The program code is loaded and executed by the processor to implement the steps of the conveyor head tripod strength calculation method of any one of claims 6-10.

14. A computer program product, characterised in that, When executed on a data processing device, it is adapted to perform the steps of the conveyor head tripod strength calculation method of any one of claims 6-10.

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