Structure optimization method of single stand column, electronic equipment and computer readable storage medium

Abstract

The invention discloses a structure optimization method of a single stand column, electronic equipment and a computer readable storage medium. The structure optimization method comprises the following steps: acquiring a section configuration of a single upright post; determining a target equivalent cross-sectional inertia moment of the single column based on design requirements; based on the section configuration and the target equivalent section inertia moment, determining an equivalent section size set of the single stand column; based on the equivalent section size set and the target equivalent section inertia moment, structural lightweight design is conducted on the single stand column. Through the mode, the structural optimization method of the single stand column has the advantages that on the premise that the rigidity is constant, aiming at the specific section configuration of the single-stand-column stacking machine, the target equivalent section inertia moment is used as the rigidity evaluation criterion, the structural lightweight design is carried out on the single stand column, and therefore the obvious weight reduction effect can be achieved on the single-stand-column structure on the premise that the rigidity is not changed.

Description

Technical Field

[0001] The present application relates to the field of stacker structure design, and in particular to a single-column structure optimization method, an electronic device, and a computer-readable storage medium. Background Art

[0002] With the rapid development of logistics, there is an urgent need for single-column stackers with stiffness that meets the design requirements. In today's logistics industry, the large changes in the height of single columns also pose challenging requirements for their stiffness. In order to improve logistics efficiency, as the height of single columns increases, the proportion of columns in the overall mass of stackers becomes larger and larger. Therefore, the structural optimization design of single columns is particularly important.

[0003] In the prior art, finite element analysis tools are often used to perform discrete design and analysis on single-column structures. When optimizing the structure of a single column, it is impossible to achieve a significant weight reduction effect on the single-column structure while meeting the stiffness requirements. Summary of the invention

[0004] The present application proposes a single-column structural optimization method, an electronic device, and a computer-readable storage medium, aiming to solve the above-mentioned problems.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a structural optimization method for a single column, which structural optimization method includes: obtaining the cross-sectional configuration of the single column; determining the target equivalent cross-sectional moment of inertia of the single column based on design requirements; determining the equivalent cross-sectional size set of the single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia; and performing structural lightweight design of the single column based on the equivalent cross-sectional size set and the target equivalent cross-sectional moment of inertia.

[0006] Among them, the step of obtaining the target equivalent section inertia moment of the single column based on the design requirements includes: obtaining the target deflection value of the single column corresponding to the design requirements; and obtaining the target equivalent section inertia moment based on the target deflection value and the single column deflection theoretical calculation model.

[0007] Among them, the step of determining the equivalent cross-sectional size set of the single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia includes: adjusting the structural parameters of the cross-sectional configuration until the fitted cross-sectional moment of inertia of the cross-sectional configuration matches the target equivalent cross-sectional moment of inertia; and determining the adjusted structural parameters as the equivalent cross-sectional size set of the single column.

[0008] Among them, the structural parameters include cross-sectional size parameters and wall thickness parameters; the step of adjusting the structural parameters of the cross-sectional configuration until the fitted cross-sectional moment of inertia of the cross-sectional configuration matches the target equivalent cross-sectional moment of inertia includes: adjusting the cross-sectional size parameters and the wall thickness parameters, and obtaining the fitted cross-sectional moment of inertia of the modified cross-sectional configuration; in response to the difference between the fitted cross-sectional moment of inertia and the target equivalent cross-sectional moment of inertia being less than a preset difference, determining that the fitted cross-sectional moment of inertia matches the target equivalent cross-sectional moment of inertia.

[0009] Among them, the single column includes multiple straight sub-columns, and the steps of performing structural lightweight design on the single column based on the equivalent section size set and the target equivalent section moment of inertia include: obtaining the number of sub-columns; obtaining the section moment of inertia corresponding to each sub-column based on the number and the target equivalent section moment of inertia; and performing structural lightweight design on each sub-column based on the section configuration and the section moment of inertia corresponding to each sub-column.

[0010] Among them, the single column includes a wedge-shaped column, and the steps of performing structural lightweight design on the single column based on the equivalent section size set and the target equivalent section moment of inertia include: obtaining a first section moment of inertia of the top surface and a second section moment of inertia of the bottom surface of the single column based on the target equivalent section moment of inertia; modifying the parameters of the section configuration based on the first section moment of inertia, the second section moment of inertia and the section configuration to obtain the top surface parameters of the single column and the bottom surface parameters of the single column; determining the integrated structure of the single column based on the top surface parameters and the bottom surface parameters; performing overall structural lightweight design on the integrated structure; and segmenting the integrated structure after the structural lightweight design based on the number requirement of sub-columns of the single column.

[0011] Among them, the structural optimization method also includes: three-dimensional modeling and simulation of the single column after structural lightweight design to obtain the simulated deflection of the column top of the single column; obtain the target deflection value based on the target equivalent section inertia moment and the pure column deflection theoretical calculation model; obtain the error result based on the simulated deflection of the column top and the target deflection value; optimize and adjust the connection structure of the sub-column of the single column based on the error result.

[0012] Among them, the step of optimizing and adjusting the connection structure of the sub-column of the single column based on the error result includes: in response to the error result being less than a first preset threshold, the connection structure is designed to be lightweight; in response to the error result being greater than a second preset threshold, the stiffness of the connection structure is increased, wherein the first preset threshold is less than the second preset threshold and are reciprocal numbers of each other.

[0013] In order to solve the above technical problems, another technical solution adopted in the present application is: to provide an electronic device, which includes a processor and a memory connected to the processor, wherein program data is stored in the memory, and the processor executes the program data stored in the memory to execute the structural optimization method of a single column to implement any of the above items.

[0014] In order to solve the above technical problems, another technical solution adopted by the present application is: providing a computer-readable storage medium, which stores program instructions therein, and the program instructions are executed by a processor to implement any of the above-mentioned single-column structural optimization methods.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the structural optimization method of the single column of the present application obtains the cross-sectional configuration of the single column; determines the target equivalent cross-sectional moment of inertia of the single column based on the design requirements, and then determines the equivalent cross-sectional dimension set of the single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia; and finally performs a structural lightweight design of the single column based on the equivalent cross-sectional dimension set and the target equivalent cross-sectional moment of inertia. In the above manner, the present application takes constant stiffness as a premise, targets the cross-sectional configuration unique to the single-column stacker, and uses the target equivalent cross-sectional moment of inertia as the stiffness evaluation criterion to perform a structural lightweight design of the single column, which can achieve a significant weight reduction effect on the single-column structure under the premise of constant stiffness. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solution of the present application.

[0017] Figure 1 It is a flow chart of the first embodiment of the structural optimization method of a single column of the present application;

[0018] Figure 2 yes Figure 1 A flow chart of an embodiment of step S102;

[0019] Figure 3 It is a structural schematic diagram of the first embodiment of the single-column stacker of the present application;

[0020] Figure 4 yes Figure 1 A schematic diagram of a flow chart of an embodiment of step S103;

[0021] Figure 5 yes Figure 4 A flow chart of an embodiment of step S301;

[0022] Figure 6 yes Figure 1 Schematic diagram of the process of the first embodiment of step S104;

[0023] Figure 7 yes Figure 1 The flowchart of the second embodiment of step S104 is shown in FIG.

[0024] Figure 8It is a flow chart of the second embodiment of the structural optimization method of a single column of the present application;

[0025] Fig. 9 yes Figure 8 A flow chart of an embodiment of step S708;

[0026] Fig.10 It is a structural schematic diagram of an embodiment of a single column cross-section configuration of the present application;

[0027] Fig.11 It is a structural schematic diagram of an embodiment of the electronic device of the present application;

[0028] Fig.12 It is a structural diagram of an embodiment of a computer-readable storage medium of the present application. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] With the rapid development of logistics, there is an urgent need for single-column stackers with stiffness that meets the design requirements. In today's logistics industry, the large changes in the height of single columns also pose challenging requirements for their stiffness. In order to improve logistics efficiency, as the height of single columns increases, the proportion of columns in the overall mass of stackers becomes larger and larger. Therefore, the structural optimization design of single columns is particularly important.

[0034] In the prior art, finite element analysis tools are often used to perform discrete design and analysis on single-column structures. When optimizing the structure of a single column, it is impossible to achieve a significant weight reduction effect on the single-column structure while meeting the stiffness requirements.

[0035] In order to solve the above problems, the present application first proposes a single-column structural optimization method, which is applied to the single column of a single-column stacker. Figure 1 , Figure 1 1 is a flow chart of the first embodiment of the structural optimization method of a single column of the present application. Figure 1 As shown, in this embodiment, the structure optimization method of a single column specifically includes steps S101 to S104:

[0036] Step S101: Obtain the cross-sectional configuration of a single column.

[0037] When performing structural optimization on a single column, the cross-sectional configuration of the single column may be obtained based on actual requirements or actual conditions, and the initial structural dimensions of the cross-sectional configuration may be preliminarily determined.

[0038] Step S102: Determine the target equivalent section moment of inertia of the single column based on design requirements.

[0039] In this embodiment, when optimizing the structure of a single column, the stiffness required by the single column can be used as the design standard, and the target equivalent section moment of inertia of the single column that meets the design stiffness requirement can be obtained by proportional conversion. Specifically, the target deflection value of the single column can be obtained based on the stiffness required by the single column, and then the target equivalent section moment of inertia can be calculated based on the target deflection value and the theoretical formula. The specific calculation method is described below.

[0040] Step S103: Determine an equivalent cross-sectional dimension set of a single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia.

[0041] After determining the cross-sectional configuration and target equivalent cross-sectional moment of inertia of a single column, the initial structural parameters of the cross-sectional configuration can be modified on this basis, and the fitted cross-sectional moment of inertia of the cross-sectional configuration after the modified parameters can be obtained. When the difference between the fitted cross-sectional moment of inertia and the target equivalent cross-sectional moment of inertia is less than a preset threshold, the structural parameters of the cross-sectional configuration at this time are obtained to construct an equivalent cross-sectional size set for a single column.

[0042] When modifying the initial structural parameters of the cross-sectional configuration, the cross-sectional size parameters and the wall thickness parameters of the cross-sectional configuration are modified first.

[0043] Step S104: Performing structural lightweight design on the single column based on the equivalent section size set and the target equivalent section moment of inertia.

[0044] In this embodiment, after obtaining the target equivalent section inertia moment and equivalent section size set of the single column, the two can be linked accordingly. At this time, the single column section can be structurally optimized along the height direction of the single column based on the target equivalent section inertia moment and equivalent section size set of the single column, thereby realizing the structural lightweight design of the single column. The specific method of structural lightweight design is shown below.

[0045] Different from the prior art, the structural optimization method of the single column of the present application obtains the cross-sectional configuration of the single column; determines the target equivalent cross-sectional moment of inertia of the single column based on the design requirements, and then determines the equivalent cross-sectional dimension set of the single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia; and finally performs a structural lightweight design of the single column based on the equivalent cross-sectional dimension set and the target equivalent cross-sectional moment of inertia. Through the above method, the present application takes constant stiffness as a premise, targets the cross-sectional configuration unique to the single-column stacker, and uses the target equivalent cross-sectional moment of inertia as the stiffness evaluation criterion to perform a structural lightweight design of the single column, which can achieve a significant weight reduction effect on the single-column structure under the premise of unchanged stiffness.

[0046] Optionally, the method for obtaining the target equivalent section moment of inertia of a single column is as follows: Figure 2 See Figure 2 , Figure 2 yes Figure 1 The flowchart of step S102 in an embodiment is as follows: Figure 2 As shown, this embodiment can be Figure 2 The method shown implements step S102, and the specific implementation steps include steps S201 to S202:

[0047] Step S201: Obtain a target deflection value of a single column corresponding to design requirements.

[0048] In this implementation, when performing structural optimization on a single column, it is first necessary to obtain a target deflection value of the single column corresponding to the design requirements.

[0049] Step S202: Obtain the target equivalent section inertia moment based on the target deflection value and the single column deflection theoretical calculation model.

[0050] Before obtaining the target deflection value of a single column, you can model the single column and construct a theoretical calculation model for the deflection of the single column. Figure 3 , Figure 3Schematic diagram of the structure of the first embodiment of the single-column stacker of the present application. Figure 3 As shown, the single-column stacker 100 in this embodiment is set on a rigid ground, wherein the single-column stacker 100 includes a column 10, a base 20 and a cargo platform 30, and the cargo platform 30 is set on one side of the column 10 and is slidably connected to the column 10 through a first positive wheel 41 and a second positive wheel 42.

[0051] right Figure 3 By analyzing the single column shown in the figure, we can obtain the theoretical calculation formula for the top deflection of the single column. Based on the theoretical calculation formula for the top deflection of the single column and the target deflection value, we can calculate the target equivalent section inertia moment. The theoretical calculation formula for the top deflection of the single column is as follows:

[0052]

[0053] Among them, f 1 M is the static deflection value at the top of a single column; e E is the equivalent total bending moment of the cargo platform (N·m); 1 is the elastic modulus of the material of the column 10 (Pa); zl is the moment of inertia of the bending section of the column 10 along the walking direction of the cargo platform 30 (m 4 );H cp h is the height of the column 10 (m); tx L is the distance from the top of the column 10 to the first positive wheel of the cargo platform 30 (m); tx It is the wheelbase (m) between the first positive wheel 41 and the second positive wheel 42 of the cargo platform 30.

[0054] Among them, in this embodiment, this embodiment constructs a theoretical calculation formula for the top deflection of a single column of a stacker with column height, cargo platform position and load as main parameters, which provides an intuitive and clear calculation formula for the quantitative design of the stacker column stiffness and provides a theoretical basis for the stiffness evaluation criteria required for the optimal design of the column structure.

[0055] Optionally, the method for determining the equivalent cross-sectional size set of a single column is as follows: Figure 4 See Figure 4 , Figure 4 yes Figure 1 The flowchart of step S103 in the embodiment is as follows: Figure 4 As shown, this embodiment can be Figure 4 The method shown implements step S103, and the specific implementation steps include step S301 to step S302:

[0056] Step S301: adjusting the structural parameters of the cross-sectional configuration until the fitted cross-sectional moment of inertia of the cross-sectional configuration matches the target equivalent cross-sectional moment of inertia.

[0057] As mentioned above, after the cross-sectional configuration of the single column is constructed, the structural parameters of the cross-sectional configuration can be adjusted so that the fitted section moment of inertia of the cross-sectional configuration is consistent with the target equivalent section moment of inertia.

[0058] Specifically, see Figure 5 , Figure 5 yes Figure 4 In this embodiment, the structural parameters include cross-sectional dimension parameters and wall thickness parameters, which can be obtained by Figure 5 The method shown implements step S301, and the specific implementation steps include steps S401 to S402:

[0059] Step S401: adjusting the cross-sectional dimension parameters and the wall thickness parameters, and obtaining the fitted cross-sectional moment of inertia of the modified cross-sectional configuration.

[0060] In this embodiment, after the cross-sectional configuration of a single column is constructed, the initial structural parameters of the cross-sectional configuration can be obtained. At this time, the cross-sectional size parameters and wall thickness parameters in the initial structural parameters can be adjusted preferentially. Since the structural parameters of the cross-sectional configuration change, the corresponding fitting cross-sectional moment of inertia will also change. Therefore, after each adjustment of the cross-sectional size parameters and wall thickness parameters, the fitting cross-sectional moment of inertia of the cross-sectional configuration after the modified parameters can be obtained.

[0061] Step S402: In response to the difference between the fitted section moment of inertia and the target equivalent section moment of inertia being less than a preset difference, determining that the fitted section moment of inertia is consistent with the target equivalent section moment of inertia.

[0062] In response to the difference between the fitted section moment of inertia of the section configuration after the parameter modification and the target equivalent section moment of inertia is less than a preset difference, it is determined that the fitted section moment of inertia is consistent with the target equivalent section moment of inertia.

[0063] In other embodiments, after obtaining the fitting section moment of inertia after the modified parameters, the fitting deflection value can be further obtained based on the fitting section moment of inertia and the top deflection theoretical calculation formula, and the fitting deflection value can be compared with the target deflection value. In response to the difference between the fitting deflection value and the target deflection value being less than the preset deflection difference, it is determined that the fitting section moment of inertia is consistent with the target equivalent section moment of inertia.

[0064] Step S302: Determine the adjusted structural parameters as an equivalent cross-sectional dimension set of a single column.

[0065] When the fitted section moment of inertia of the cross-sectional configuration matches the target equivalent section moment of inertia, the adjusted structural parameters can be determined as an equivalent section size set of a single column.

[0066] Optionally, a method for lightweight design of a single column is as follows: Figure 6See Figure 6 , Figure 6 yes Figure 1 In the present embodiment, the single column includes a plurality of straight sub-columns, such as Figure 6 As shown, this embodiment can be Figure 6 The method shown implements step S104, and the specific implementation steps include steps S501 to S503:

[0067] Step S501: Obtain the number of sub-columns.

[0068] Due to assembly and transportation restrictions, if the column is too high, it needs to be laid out in sections. At this time, it is necessary to appropriately distribute it according to the upper limit of the height set for the sections. In this implementation, the single column is a multi-section straight sub-column type, that is, the cross-section of each section of the sub-column is equal.

[0069] Therefore, when performing structural optimization along the height direction of a single column of a multi-segment straight sub-column type, the number n of the sub-columns of the single column must first be obtained.

[0070] Step S502: Obtain the section moment of inertia corresponding to each sub-column based on the quantity and the target equivalent section moment of inertia.

[0071] As mentioned above, based on the stiffness requirements of the single column, we determined the target equivalent section moment of inertia, and based on the assembly requirements, we also obtained the number n of sub-columns of the single column. At this time, based on the number n of sub-columns and the target equivalent section moment of inertia of the single column, we can obtain the section moment of inertia corresponding to each sub-column.

[0072] The process of obtaining the section moment of inertia corresponding to each sub-column is as follows:

[0073] In this embodiment, the number of factor columns is n. At this time, the entire single column can be discretized into n parts (n=1, 2, 3, ...) along the height direction. After being discretized into n sub-columns, the single column has n+1 discrete cross-sections. The cross-sections obtained from the top to the bottom are respectively represented by A i Represents (n = 0, 1, 2, 3, ...), where for any column cross section A i (The corresponding section moment of inertia is I zl [A i ]) must satisfy formulas (2) and (3) at the same time, and their joint description is as follows:

[0074]

[0075] Among them, I zl [A i ] is the section moment of inertia of any sub-column section, I zl [EQ] is the target equivalent section moment of inertia, Hcp is the height of a single column, n is the total number of sub-columns, and i is the subscript of the current discrete section (for example, the top column section is A 0 ).

[0076] In this embodiment, the column inclination angle can be preliminarily set by combining formula (2) with the design environment of the column and determining the top and bottom cross sections of the column. Based on this, combined with formula (3), the section inertia moments of the top and bottom surfaces of the j-th (j=1, 2, ..., n) sub-column are solved respectively, and the equivalent section inertia moment of the sub-column is formed, and I zl [j].

[0077] Step S503: Performing a lightweight structural design on each sub-column based on the cross-sectional configuration and the cross-sectional moment of inertia corresponding to each sub-column.

[0078] At this time, after obtaining the equivalent section inertia moment I of each sub-column zl [j] and the corresponding cross-sectional configuration, the structural lightweight design of each sub-column can be carried out.

[0079] The process of structural lightweight design for each sub-column is as follows:

[0080] Based on the cross-sectional configuration of a single column, by changing the structural dimension parameters of the sub-column (such as the wall thickness parameter), combined with formula (4) as the lightweight evaluation criterion, the structural optimization design of any sub-column is performed, where formula (4) is as follows:

[0081]

[0082] Where ρ is the material density of a single column, H cp is the height of a single column, I zl [EQ] is the target equivalent section moment of inertia, A[Ai] is the material filling area of ​​the discrete section Ai, and Δi is the height of the section corresponding to the discrete section, which can be understood as the differential equal section height.

[0083] Optionally, a method for lightweight design of a single column is as follows: Figure 7 See Figure 7 , Figure 7 yes Figure 1 Schematic diagram of the flow chart of the second embodiment of step S104 in FIG. In this embodiment, the single column includes a wedge-shaped column, such as Figure 7 As shown, this embodiment can be Figure 7 The method shown implements step S104, and the specific implementation steps include steps S601 to S605:

[0084] Step S601: obtaining a first moment of inertia of the top surface and a second moment of inertia of the bottom surface of a single column based on a target equivalent moment of inertia of the section.

[0085] In this embodiment, the single column is a wedge-shaped column, that is, the single column is a column with unequal cross-sections along the height direction. At this time, the first cross-sectional moment of inertia of the top surface and the second cross-sectional moment of inertia of the bottom surface of the single column can be respectively obtained based on the above formula (2) and formula (3) and the target equivalent cross-sectional moment of inertia.

[0086] Step S602: modifying the parameters of the cross-sectional configuration based on the first cross-sectional moment of inertia, the second cross-sectional moment of inertia and the cross-sectional configuration to obtain the top surface parameters of the single column and the bottom surface parameters of the single column.

[0087] At this time, after determining the first section moment of inertia of the top surface and the second section moment of inertia of the bottom surface of the single column, the structural dimension parameters of the section configuration can be adjusted based on the section configuration of the single column and with the first section moment of inertia and the second section moment of inertia as design targets, thereby obtaining the top surface parameters of the single column and the bottom surface parameters of the single column, respectively. However, it should be noted here that the wall thickness parameters of the section configuration need to be kept unchanged during the adjustment process.

[0088] Step S603: Determine the integrated structure of the single column based on the top surface parameters and the bottom surface parameters.

[0089] After obtaining the top and bottom parameters of the single column, at this time, a conical layout can be used along the height direction to perform an integrated layout design on the single column to form an integrated structure of the single column.

[0090] Step S604: performing overall lightweight design on the integrated structure.

[0091] After determining the integrated structure of the single column, the above formula (4) can be used to perform overall lightweight design on the integrated structure.

[0092] Step S605: Segment the integrated structure after the structural lightweight design based on the quantity requirement of the sub-columns of the single column.

[0093] Subsequently, based on the assembly or transportation requirements of the single column and referring to the system solution of the structural design, the number of sub-columns can be determined based on the number requirements of the sub-columns of the single column, and finally the integrated structure of the single column can be segmented based on the number of sub-columns.

[0094] Different from the prior art, in this application Figure 6 and Figure 7In the embodiments, formula (2) and formula (3) are used to quantitatively design and analyze the discrete cross-section of the single column, and a stepped combination scheme for the single column of the super-high stacker is provided, which provides an accurate, effective and quantifiable structural optimization method for the serial design of the single column.

[0095] This application further proposes a single column structural optimization method, please refer to Figure 8 , Figure 8 1 is a flow chart of the second embodiment of the structural optimization method of a single column of the present application. Figure 8 As shown, in this embodiment, the structure optimization method of a single column specifically includes steps S701 to S708:

[0096] Step S701: Obtain the cross-sectional configuration of a single column.

[0097] Step S701 is the same as step S101 and will not be described again.

[0098] Step S702: Determine the target equivalent section moment of inertia of the single column based on design requirements.

[0099] Step S702 is consistent with step S102 and will not be described again.

[0100] Step S703: Determine an equivalent cross-sectional dimension set of a single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia.

[0101] Step S703 is the same as step S103 and will not be described again.

[0102] Step S704: Performing structural lightweight design on the single column based on the equivalent section size set and the target equivalent section moment of inertia.

[0103] Step S704 is the same as step S104 and will not be described again.

[0104] Step S705: three-dimensional modeling and simulation are performed on the single column after the structural lightweight design to obtain the simulated deflection of the column top of the single column.

[0105] After the single column is subjected to the structural lightweight design as described above, the present embodiment can perform three-dimensional modeling on it and import its corresponding structural model into the finite element software. After importing the structural model, the material properties of the model are defined, such as elastic modulus, Poisson's ratio, density, yield strength, etc., and the model boundary conditions and loading methods are defined. The overall structure of the model is divided by a solid grid method. Finally, after solving it, the simulated deflection of the top of the single column can be obtained, which is expressed as f 1 ′.

[0106] Step S706: Obtain a target deflection value based on the target equivalent section inertia moment and the pure column deflection theoretical calculation model.

[0107] At this time, this embodiment can also perform theoretical calculation based on the target equivalent section inertia moment and use the formula (1) mentioned above to obtain the target deflection value f 1 .

[0108] Step S707: Obtain an error result based on the simulated deflection at the top of the column and the target deflection value.

[0109] At this time, the top simulation deflection f is obtained respectively. 1 ′ and target deflection value f 1 After that, the two can be analyzed to obtain the error result. The error result is obtained as shown in formula (5):

[0110]

[0111] Among them, σ represents the error result, f 1 ′ is the simulated deflection at the top, f 1 is the target deflection value.

[0112] Step S708: Optimize and adjust the connection structure of the sub-columns of the single column based on the error result.

[0113] After obtaining the error result after the lightweight design of the single column structure, the connection structure of the sub-columns of the single column can be optimized and adjusted based on the error result. The specific adjustment method is described as follows.

[0114] Optionally, the method for optimizing and adjusting the connection structure of the sub-columns of the single column is as follows: Fig. 9 See Fig. 9 , Fig. 9 yes Figure 8 Schematic diagram of the process of step S708 in an embodiment. In this embodiment, Fig. 9 As shown, this embodiment can be Fig. 9 The method shown implements step S708, and the specific implementation steps include step S801 to step S802:

[0115] Step S801: In response to the error result being less than a first preset threshold, a lightweight design is performed on the connection structure.

[0116] In this embodiment, if the error result is less than the first preset threshold, a lightweight design is performed on the connection structure.

[0117] Among them, if the error result is less than the first preset threshold, it means that the structural stiffness of the connection part between the sub-columns is higher than that of the single column. This will not have much impact on the actual use effect of the single column, but based on lightweight considerations, it can be appropriately designed to be lightweight in combination with the weight distribution of the connection part.

[0118] After lightweight design is performed on the connection structure, the error result may be obtained again, and the connection structure may be lightweight designed until the absolute value of the obtained error result is smaller than the absolute value of the first preset threshold (or the second preset threshold).

[0119] Step S802: In response to the error result being greater than a second preset threshold, increasing the stiffness of the connection structure, wherein the first preset threshold is less than the second preset threshold and are opposite to each other.

[0120] In this embodiment, if the error result is greater than the first preset threshold, the stiffness of the connection structure is increased.

[0121] Among them, if the error result is greater than the first preset threshold, it means that the structural stiffness of the connection part between the sub-columns is lower than the stiffness of the single column. At this time, the stiffness of the connection part between the segmented columns can be quantitatively increased by comparing the section inertia moment.

[0122] After increasing the stiffness of the connection structure, the error result may be recalculated, with the stiffness increased until the absolute value of the error result is smaller than the absolute value of the second preset threshold (or the first preset threshold).

[0123] Exemplarily, in this embodiment, the first preset threshold can be set to -5%, and the second preset threshold can be set to 5%. In other embodiments, the first preset threshold and the second preset threshold can be set based on actual conditions and are not limited here.

[0124] In an application scenario, a certain type of single-column stacker (height 22m) is taken as an example, formula (1) in the previous article is used as the theoretical calculation formula for the top deflection of the single column of the stacker, and the structure of the single-column stacker is optimized according to the single-column structure optimization method in the previous article.

[0125] First, based on the design parameters of a 22m high single column and combined with the on-site handling requirements, the target deflection value f of the single column stacker is obtained. 1 [T], and the target section inertia moment I is inferred by formula (1) zl [EQ].

[0126] Second, see Fig.10 , Fig.10 Schematic diagram of the structure of an embodiment of a single column cross-section configuration of the present application. Fig.10As shown, the cross-sectional configuration of the single column of this model adopts the "H-type + double-wing welding" welding method as the main supporting structural component for lifting the cargo platform of the stacker. The column cross-section adopts a quasi-rectangular structure. Except for the "H-type + double-wing welding" as one side of the quasi-rectangle, the other three sides are made of thin plates, and the quasi-rectangle is welded as a whole. Fig.10 The cross-sectional configuration shown is only a reference case for this embodiment, and the scope of application of the structural optimization method of this application is not limited by the cross-sectional configuration of the column. Fig.10 The initial structural parameters of the mid-section configuration can be preliminarily set and defined as the section size set Section00. In this embodiment, the section property reading tool of the 3D software can be used to determine its section inertia moment and the neutral plane position (used to calculate the fitting section inertia moment of the section configuration), and the fitting section inertia moment corresponding to the Section00 section is assigned to the parameter I zl [INIT], and calculate the initial value of deflection by formula (1) and assign it to parameter f 1 [INIT].

[0127] At this time, f 1 [INIT] and f 1 [T] Compare and adjust Fig.10 The structural parameters of the cross-sectional configuration shown meet the judgment criteria Here, i represents the number of cross-section adjustments or the serial number, which can be arranged in order from small to large using natural numbers.

[0128] Therefore, after the cross-sectional configuration of the single column is fixed, the present embodiment can adjust the structural parameters of the cross-sectional configuration to meet the judgment criteria, then determine the equivalent cross-sectional dimension set Section[EQ] of the cross-sectional configuration, and assign the target equivalent cross-sectional inertia moment to I zl [EQ].

[0129] The above is the calculation and confirmation of the target equivalent section moment of inertia and equivalent section size set of the single-column stacker. Next, in this embodiment, the single column can be structurally lightweight designed based on the equivalent section size set and the target equivalent section moment of inertia. For the equivalent section moment of inertia, there are countless schemes for the corresponding single-column structure along the height direction. For example: columns with equal cross-sections in the height direction, columns with unequal cross-sections in the height direction (represented by wedge-shaped columns), etc. Here, only the height is used as the main parameter for structural optimization, and the column is structurally optimized.

[0130] For a single-column stacker (materials of equal quality), the static deflection of its cargo platform in the walking direction is approximately proportional to the square of the height and inversely proportional to the cross-sectional inertia moment. Taking this as the basis for optimization, the stacker column can be wedge-shaped for optimization design. The 22m stacker is wedge-shaped and discretized again to make it conform to the height distribution principle of the cross-sectional inertia moment shown in formula (2) and formula (3). At the same time, formula (4) is used to perform a lightweight structural design, and a series of optimization solutions can be obtained.

[0131] In this embodiment, if a single column includes multiple straight sub-columns (i.e., each section has the same cross-section in the height direction, and the cross-sections between adjacent sections are different, similar to a stepped tower structure), due to assembly and transportation restrictions, the 22m high stacker can be split into three sub-columns in this embodiment (each section is less than 10m). At this time, the cross-sectional moment of inertia of each sub-column can be obtained using formulas (2) and (3) in the previous text. Finally, based on the cross-sectional configuration of the single column, by changing the structural dimensions or wall thickness of the sub-column and other parameters, combined with formula (4) as a lightweight evaluation criterion, the structure of any sub-column is optimized.

[0132] On this basis, after lightweight design of each sub-column, it is also necessary to strengthen the connection structure of the sub-column. At this time, it is necessary to perform 3D modeling and finite element simulation analysis on the lightweight single column to obtain the top simulation deflection f 1 ′. At this time, the target deflection value f 1 The error comparison and judgment are performed according to formula (5), and finally the connection structure of the sub-column is optimized based on the error result.

[0133] If the single column is a wedge-shaped column structure, that is, the moment of inertia of the section of the single column along the height square is different, when optimizing the structure of the single column, firstly, a wedge-shaped design is performed without segmentation, and the first moment of inertia of the top surface and the second moment of inertia of the bottom surface of the single column are determined according to formula (2) and formula (3). Based on the first moment of inertia, the second moment of inertia and the section configuration, the parameters of the section configuration are modified to obtain the top surface parameters and the bottom surface parameters of the single column, and the integrated structure of the single column is determined based on the top surface parameters and the bottom surface parameters.

[0134] After determining the integrated structure of the single column, the integrated structure of the single column can be designed to be lightweight as a whole using formula (4). After the lightweight design, the integrated structure of the single column can be segmented according to transportation restrictions. In this embodiment, the single column can be divided into three sub-columns. After the integrated structure of the single column is segmented, the connection structure of the sub-columns needs to be optimized.

[0135] As mentioned above, it is necessary to perform 3D modeling and finite element simulation analysis on the lightweight single column to obtain the top simulation deflection f 1 ′. At this time, the target deflection value f 1 The error comparison and judgment are performed according to formula (5), and finally the connection structure of the sub-column is optimized based on the error result.

[0136] Different from the prior art, the structural optimization method of the single column of the present application obtains the cross-sectional configuration of the single column; determines the target equivalent cross-sectional moment of inertia of the single column based on the design requirements, and then determines the equivalent cross-sectional dimension set of the single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia; and finally performs a structural lightweight design of the single column based on the equivalent cross-sectional dimension set and the target equivalent cross-sectional moment of inertia. Through the above method, the present application takes constant stiffness as a premise, targets the cross-sectional configuration unique to the single-column stacker, and uses the target equivalent cross-sectional moment of inertia as the stiffness evaluation criterion to perform a structural lightweight design of the single column, which can achieve a significant weight reduction effect on the single-column structure under the premise of unchanged stiffness.

[0137] Optionally, the present application further proposes an electronic device, see Fig.11 , Fig.11 It is a schematic diagram of the structure of an electronic device according to an embodiment of the present application. The electronic device 200 includes a processor 201 and a memory 202 connected to the processor 201 .

[0138] The processor 201 may also be referred to as a CPU (Central Processing Unit). The processor 201 may be an integrated circuit chip having signal processing capabilities. The processor 201 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0139] The memory 202 is used to store program data required for the processor 201 to run.

[0140] The processor 201 is further configured to execute program data stored in the memory 202 to implement any of the above-mentioned single-column structural optimization methods.

[0141] Optionally, the present application further proposes a computer-readable storage medium. Fig.12 , Fig.12 It is a structural diagram of an embodiment of a computer-readable storage medium of the present application.

[0142] The computer-readable storage medium 300 of the embodiment of the present application stores program instructions 310 therein, and the program instructions 310 are executed to implement any of the above-mentioned single-column structural optimization methods.

[0143] Among them, the program instructions 310 can form a program file and be stored in the above-mentioned storage medium in the form of a software product, so that an electronic device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) executes all or part of the steps of each implementation method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes, or terminal devices such as computers, servers, mobile phones, tablets, etc.

[0144] The computer-readable storage medium 300 of this embodiment may be, but is not limited to, a USB flash drive, an SD card, a PD optical drive, a mobile hard disk, a large-capacity floppy drive, a flash memory, a multimedia memory card, a server, and the like.

[0145] In one embodiment, a computer program product or computer program is provided, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the electronic device performs the steps in the above-mentioned method embodiments.

[0146] In addition, if the above functions are implemented in the form of software functions and sold or used as independent products, they can be stored in a storage medium readable by a mobile terminal, that is, the present application also provides a storage device storing program data, the program data can be executed to implement the method of the above embodiment, and the storage device can be, for example, a USB flash drive, an optical disk, a server, etc. In other words, the present application can be embodied in the form of a software product, which includes a number of instructions for enabling an intelligent terminal to execute all or part of the steps of the methods of each embodiment.

[0147] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0148] Any process or method description in a flowchart or otherwise described herein may be understood to represent a mechanism, segment or portion of a code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0149] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (which can be a personal computer, server, network device or other system that can fetch instructions from the instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable storage medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0150] The above are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A structural optimization method for a single column, It is characterized in that include: Obtaining a cross-sectional configuration of the single column; Determining a target equivalent section moment of inertia of the single column based on design requirements; Determining an equivalent cross-sectional dimension set of the single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia; The single column is structurally designed to be lightweight based on the equivalent section size set and the target equivalent section moment of inertia.

2. The structural optimization method according to claim 1, It is characterized in that The step of obtaining the target equivalent section inertia moment of the single column based on the design requirements includes: Obtaining a target deflection value of the single column corresponding to the design requirement; The target equivalent section inertia moment is obtained based on the target deflection value and the single column deflection theoretical calculation model.

3. The structural optimization method according to claim 2, It is characterized in that The step of determining the equivalent cross-sectional dimension set of the single column based on the cross-sectional configuration and the target equivalent cross-sectional moment of inertia comprises: Adjusting structural parameters of the cross-sectional configuration until the fitted cross-sectional moment of inertia of the cross-sectional configuration matches the target equivalent cross-sectional moment of inertia; The adjusted structural parameters are determined to be an equivalent cross-sectional dimension set of the single column.

4. The structural optimization method according to claim 3, It is characterized in that The structural parameters include cross-sectional size parameters and wall thickness parameters; the step of adjusting the structural parameters of the cross-sectional configuration until the fitted cross-sectional moment of inertia of the cross-sectional configuration matches the target equivalent cross-sectional moment of inertia includes: Adjusting the cross-sectional dimension parameters and the wall thickness parameters, and obtaining the fitted cross-sectional moment of inertia of the modified cross-sectional configuration; In response to the difference between the fitted section moment of inertia and the target equivalent section moment of inertia being less than a preset difference, it is determined that the fitted section moment of inertia is consistent with the target equivalent section moment of inertia.

5. The structural optimization method according to claim 1, It is characterized in that The single column includes a plurality of straight sub-columns, and the step of performing a structural lightweight design on the single column based on the equivalent section size set and the target equivalent section moment of inertia includes: Obtain the number of sub-columns; Obtaining the section moment of inertia corresponding to each of the sub-columns based on the quantity and the target equivalent section moment of inertia; Based on the cross-sectional configuration and the cross-sectional moment of inertia corresponding to each sub-column, a lightweight structural design is performed on each sub-column.

6. The structural optimization method according to claim 1, It is characterized in that The single column includes a wedge-shaped column, and the step of performing a structural lightweight design on the single column based on the equivalent cross-sectional dimension set and the target equivalent cross-sectional moment of inertia includes: Acquire a first moment of inertia of a top surface and a second moment of inertia of a bottom surface of the single column based on the target equivalent moment of inertia of a section; Modifying the parameters of the cross-sectional configuration based on the first cross-sectional moment of inertia, the second cross-sectional moment of inertia, and the cross-sectional configuration to obtain the top surface parameters of the single column and the bottom surface parameters of the single column; Determining the integrated structure of the single column based on the top surface parameters and the bottom surface parameters; Performing overall lightweight design on the integrated structure; The integrated structure after structural lightweight design is segmented based on the quantity requirement of the sub-columns of the single column.

7. The structural optimization method according to claim 5 or 6, It is characterized in that The structural optimization method further comprises: Performing three-dimensional modeling and simulation on the single column after the structural lightweight design to obtain the simulated deflection of the column top of the single column; Obtaining a target deflection value based on the target equivalent section inertia moment and a pure column deflection theoretical calculation model; Obtaining an error result based on the simulated deflection of the top end of the column and the target deflection value; The connection structure of the sub-columns of the single column is optimized and adjusted based on the error result.

8. The structural optimization method according to claim 7, It is characterized in that The step of optimizing and adjusting the connection structure of the sub-columns of the single column based on the error result comprises: In response to the error result being less than a first preset threshold, performing a lightweight design on the connection structure; In response to the error result being greater than a second preset threshold, the stiffness of the connection structure is increased, wherein the first preset threshold is less than the second preset threshold and are inverse numbers of each other.

9. An electronic device, It is characterized in that The electronic device includes a processor and a memory connected to the processor, wherein the memory stores program data, and the processor executes the program data stored in the memory to implement the single column structure optimization method described in any one of claims 1-8.

10. A computer-readable storage medium, It is characterized in that Program instructions are stored therein, and the program instructions are executed to implement the single column structure optimization method described in any one of claims 1-8.

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