Structure optimization method of lower cross beam, electronic equipment and computer readable storage medium

Abstract

The invention discloses a structure optimization method of a lower cross beam, electronic equipment and a computer readable storage medium. The structure optimization method of the lower cross beam is applied to the single-stand-column stacking machine, the single-stand-column stacking machine comprises the lower cross beam and a stand column, and the structure optimization method of the lower cross beam comprises the steps that the first theoretical deflection of the stand column and the second theoretical deflection of the lower cross beam are obtained; determining whether to perform structure optimization on the lower cross beam based on the first theoretical deflection and the second theoretical deflection; and if yes, topological optimization is carried out on the section configuration of the lower cross beam, and reinforcement optimization is carried out on the corner structure of the lower cross beam. In this way, the structural rigidity of the lower cross beam can be theoretically evaluated through the theoretical deflection, and the lower cross beam structure of the single-stand-column stacking machine is subjected to reinforcing design by adjusting the section configuration and the corner structure of the lower cross beam; an accurate and efficient optimization method is provided for rigidity strengthening design and quantitative evaluation of the single-column stacker system.

Description

Technical Field

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

[0002] With the increase in the height of the single-column stacker column and the rapid development of the logistics industry, the demand for quantitative evaluation of the structural strength of the lower beam of the single-column stacker and the structural optimization design has become more severe. In the calculation of the deflection of the stacker column, the structural strength of the lower beam and the deflection caused by it are still not enough to attract the attention of designers, resulting in a dilemma in the optimization design of the column structure. Therefore, in the optimization design of the structure of the super-high single-column stacker, the optimization of the lower beam structure is actually an indispensable link and plays a vital role.

[0003] However, in the prior art, the strength of the lower beam structure is not given enough attention in the column design of the traditional single-column stacker, and the currently available traditional empirical design methods are unable to effectively optimize the design and evaluation of the lower beam structure. Summary of the invention

[0004] The present application proposes a structural optimization method for a lower cross beam, 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 lower beam, and the structural optimization method for the lower beam is applied to a single-column stacker, and the single-column stacker includes a lower beam and a column. The structural optimization method for the lower beam includes: obtaining a first theoretical deflection of the column and a second theoretical deflection of the lower beam; determining whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection; if so, topologically optimizing the cross-sectional configuration of the lower beam, and reinforcing and optimizing the corner structure of the lower beam.

[0006] Among them, the step of determining whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection includes: obtaining the deflection ratio of the lower beam based on the first theoretical deflection and the second theoretical deflection; in response to the deflection ratio of the lower beam being greater than the preset allowable ratio, determining that the lower beam needs to be structurally optimized.

[0007] Among them, the step of topologically optimizing the cross-sectional configuration of the lower beam includes: obtaining the initial equivalent cross-sectional moment of inertia of the lower beam; adjusting the parameters of the cross-sectional configuration of the lower beam until a first ratio of the cross-sectional moment of inertia of the cross-sectional configuration of the lower beam after the parameter adjustment to the initial equivalent cross-sectional moment of inertia is less than a second ratio, wherein the second ratio is the ratio between the deflection proportion of the lower beam after the parameter adjustment and the allowable proportion.

[0008] Among them, before adjusting the parameters of the cross-sectional configuration of the lower beam, the step of topologically optimizing the cross-sectional configuration of the lower beam also includes: judging whether the cross-sectional configuration of the lower beam meets the strengthening requirements; in response to the cross-sectional configuration of the lower beam meeting the strengthening requirements, executing the step of topologically optimizing the cross-sectional configuration of the lower beam.

[0009] Among them, the step of strengthening and optimizing the corner structure of the lower cross beam includes: structural modeling and simulation of the lower cross beam based on the cross-sectional configuration corresponding to the lower cross beam after topology optimization to obtain a simulated deformation value; adjusting the structural parameters of the corner structure of the lower cross beam so that the simulated deformation value corresponding to the adjusted lower cross beam meets the preset deformation threshold, and the difference between the cross-sectional moment of inertia of the adjusted lower cross beam and the cross-sectional moment of inertia corresponding to the lower cross beam after topology optimization is less than a first preset difference.

[0010] Before the step of determining whether to perform structural optimization on the lower cross beam based on the first theoretical deflection and the second theoretical deflection, the structural optimization method further includes: performing structural optimization on the column.

[0011] Among them, the step of structural optimization of the column includes: constructing a finite element simulation model of the column and obtaining a first simulated deflection value of the column; judging whether the ratio of the first simulated deflection value to the first theoretical deflection is less than a preset ratio threshold; if so, optimizing the design of the connection part of the column until the ratio of the first simulated deflection value to the first theoretical deflection is greater than or equal to the preset ratio threshold.

[0012] Among them, the structural optimization method also includes: establishing a joint model of the reinforced and optimized lower beam and column; performing finite element simulation on the joint model to obtain a second simulated deflection of the lower beam; obtaining a deflection error based on the second simulated deflection and the second theoretical deflection; and strengthening the transition connection between the lower beam and the gear train based on the deflection error.

[0013] Among them, the step of strengthening the transition connection between the lower beam and the gear train based on the deflection error includes: in response to the deflection error being greater than the preset deflection error, the transition connection between the lower beam and the gear train is corrected, and the difference between the cross-sectional moment of inertia of the corrected lower beam and the cross-sectional moment of inertia corresponding to the lower beam after topology optimization is made less than a second preset difference, and the deflection error is less than or equal to the preset deflection error.

[0014] 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 the lower beam to implement any of the above items.

[0015] 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 methods for optimizing the structure of the lower cross beam.

[0016] The beneficial effects of the present application are as follows: Different from the prior art, the structural optimization method of the lower beam of the present application first obtains the first theoretical deflection of the column and the second theoretical deflection of the lower beam; and determines whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection; when the lower beam needs to be structurally optimized, the cross-sectional configuration of the lower beam is topologically optimized, and the corner structure of the lower beam is reinforced and optimized. Through the above methods, the present application can use theoretical deflection to theoretically evaluate the structural stiffness of the lower beam, and strengthen the design of the lower beam structure of the single-column stacker by adjusting the cross-sectional configuration and corner structure of the lower beam, providing an accurate and efficient optimization method for the stiffness reinforcement design and quantitative evaluation of the single-column stacker system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 It is a flow chart of the first embodiment of the structural optimization method of the beam in the present application;

[0019] Figure 2 It is a structural schematic diagram of an embodiment of the single-column stacker of the present application;

[0020] Figure 3 yes Figure 1 A flow chart of an embodiment of step S102;

[0021] Figure 4 yes Figure 1 Schematic diagram of the process of the first embodiment of step S103;

[0022] Figure 5 yes Figure 1 A schematic diagram of the flow chart of the second embodiment of step S103;

[0023] Figure 6 yes Figure 1 The flowchart of step S103 in the third embodiment;

[0024] Figure 7 It is a flow chart of the second embodiment of the structural optimization method of the beam in the present application;

[0025] Figure 8 yes Figure 7A flow chart of an embodiment of step S601;

[0026] Fig. 9 It is a flow chart of the third embodiment of the structural optimization method of the beam in the present application;

[0027] Fig.10 is a schematic diagram of an embodiment of a cross-section configuration of a beam under the present application;

[0028] Fig.11 It is a structural schematic diagram of an embodiment of the electronic device of the present application;

[0029] Fig.12 It is a structural diagram of an embodiment of a computer-readable storage medium of the present application. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] With the increase in the height of the single-column stacker column and the rapid development of the logistics industry, the demand for quantitative evaluation of the structural strength of the lower beam of the single-column stacker and the structural optimization design has become more severe. In the calculation of the deflection of the stacker column, the structural strength of the lower beam and the deflection caused by it are still not enough to attract the attention of designers, resulting in a dilemma in the optimization design of the column structure. Therefore, in the optimization design of the structure of the super-high single-column stacker, the optimization of the lower beam structure is actually an indispensable link and plays a vital role.

[0035] However, in the prior art, the strength of the lower beam structure is not given enough attention in the column design of the traditional single-column stacker, and the currently available traditional empirical design methods are unable to effectively optimize the design and evaluation of the lower beam structure.

[0036] In order to solve the above problems, the present application first proposes a structural optimization method for a lower crossbeam, which is applied to a single-column stacker. Figure 1 , Figure 1 1 is a flow chart of the first embodiment of the structural optimization method of the beam in this application. Figure 1 As shown, in this embodiment, the structural optimization method of the lower beam specifically includes steps S101 to S103:

[0037] Step S101: Obtain the first theoretical deflection of the column and the second theoretical deflection of the lower beam.

[0038] See also Figure 2 , Figure 2 Schematic diagram of the structure of an embodiment of the single-column stacker of the present application. Figure 2 As shown, the single-column stacker 100 of this embodiment includes a lower cross beam 50 and a column 10, wherein the column 10 is arranged above the lower cross beam 50 and is fixedly connected to the lower cross beam 50 through a base 20, wherein the single-column stacker 100 also includes a base 20, and a cargo platform 30 is arranged on one side of the column 10, and is slidably connected to the column through a first positive wheel 41 and a second positive wheel 42.

[0039] At this time, based on Figure 2 The single-column stacker 100 shown in the figure constructs a structural finite element model, and determines the geometric parameters, material parameters and external load parameters. By simplifying the model, the deflection calculation formula (1) of the pure column and the deflection calculation formula (2) of the lower beam under load can be constructed respectively, where formula (1) and formula (2) are as follows:

[0040]

[0041] The calculation formula (3) of the rotation angle θ is as follows:

[0042]

[0043] In the above formula, f 1 M is the static deflection value at the top of the column 10; e E is the mass equivalent total bending moment of the cargo platform 30 (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 is the wheelbase (m) between the first positive wheel 41 and the second positive wheel 42 of the cargo platform 30; 2 H is the deflection value of the top of the column 10 caused by the rotation angle θ of the lower beam 50 under the load; 2 E is the distance from the neutral plane of the moment load of the lower beam 50 to the top of the column 10 (m); 2 is the elastic modulus of the material of the lower cross beam 50 (Pa); z is the moment of inertia of the bending section of the lower beam 50 (m 4 ); L is the total length of the lower cross beam 50; d is the first distance between the first threaded hole and the second threaded hole; d 1 is the second distance between the first threaded hole and the neutral plane G of the column 10; d 2 is the third distance between the second threaded hole and the neutral plane of the column; a is the fourth distance between the first threaded hole and the end of the lower beam 50 close to the first threaded hole; b is the fifth distance between the second threaded hole and the end of the lower beam 50 close to the second threaded hole; g is the acceleration of gravity, and m is the mass carried by the lower beam 50, wherein the mass carried by the lower beam 50 mainly comes from the mass of the column 10, the mass of the cargo platform 30 and the load.

[0044] After determining the above parameters, the first theoretical deflection f of the column can be obtained based on the above formulas. 1 and the second theoretical deflection f caused by the lower beam 2 .

[0045] Step S102: Determine whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection.

[0046] In obtaining the first theoretical deflection f of the column 1 and the second theoretical deflection f caused by the lower beam 2 After that, based on the first theoretical deflection f 1 and the second theoretical deflection f caused by the lower beam 2The deflection component ratio of the lower beam is calculated and compared with the preset allowable ratio. Based on the comparison result, it is determined whether to optimize the structure of the lower beam.

[0047] If the lower cross beam needs to be structurally optimized, go to step S103.

[0048] Step S103: topologically optimize the cross-sectional configuration of the lower cross beam, and reinforce and optimize the corner structure of the lower cross beam.

[0049] When optimizing the structure of the lower beam, the cross-sectional configuration of the lower beam can be topologically optimized first, and the cross-sectional configuration can be optimized from the perspective of cross-sectional moment of inertia structural strengthening. After that, the corner structure of the lower beam is also reinforced and optimized to ensure that the stress value at the corner where the lower beam is connected to the column is close to the allowable stress of the material.

[0050] Different from the prior art, the structural optimization method of the lower beam of the present application first obtains the first theoretical deflection of the column and the second theoretical deflection of the lower beam; and determines whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection; when the lower beam needs to be structurally optimized, the cross-sectional configuration of the lower beam is topologically optimized, and the corner structure of the lower beam is reinforced and optimized. Through the above methods, the present application can use theoretical deflection to theoretically evaluate the structural stiffness of the lower beam, and strengthen the design of the lower beam structure of the single-column stacker by adjusting the cross-sectional configuration and corner structure of the lower beam, providing an accurate and efficient optimization method for the stiffness reinforcement design and quantitative evaluation of the single-column stacker system.

[0051] Optionally, a method for determining whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection is as follows: Figure 3 See Figure 3 , Figure 3 yes Figure 1 The flowchart of step S102 in the embodiment is as follows: Figure 3 As shown, this embodiment can be Figure 3 The method shown implements step S102, and the specific implementation steps include steps S201 to S202:

[0052] Step S201: Obtain the deflection ratio of the lower beam based on the first theoretical deflection and the second theoretical deflection.

[0053] As mentioned above, after obtaining the first theoretical deflection f of the column 1 and the second theoretical deflection f caused by the lower beam 2 After that, based on the first theoretical deflection f 1 and the second theoretical deflection f caused by the lower beam 2The proportion of the lower beam deflection component is calculated, where the calculation formula of the lower beam deflection proportion is shown in formula (4):

[0054]

[0055] Among them, λ is the deflection ratio of the lower beam, f 1 is the first theoretical deflection, f 2 is the second theoretical deflection.

[0056] Step S202: In response to the deflection ratio of the lower beam being greater than the preset allowable ratio, it is determined that the structure of the lower beam needs to be optimized.

[0057] After obtaining the deflection proportion λ of the lower beam based on the above formula, it is compared with the preset allowable proportion [λ]. If λ≤[λ], it is determined that the lower beam does not need to be structurally optimized. If λ>[λ], it is determined that the lower beam needs to be structurally optimized.

[0058] Optionally, the cross-sectional configuration of the lower beam is topologically optimized as follows: Figure 4 See Figure 4 , Figure 4 yes Figure 1 The flowchart of the first embodiment of step S103 is as follows: Figure 4 As shown, this embodiment can be Figure 4 The method shown implements the step of topologically optimizing the cross-sectional configuration of the lower beam in step S103, and the specific implementation steps include steps S301 to S302:

[0059] Step S301: Obtain the initial equivalent section moment of inertia of the lower beam.

[0060] Before topologically optimizing the cross-sectional configuration of the lower beam, it is necessary to first obtain the initial equivalent cross-sectional inertia moment I of the lower beam of the original single-column stacker model. Z , where the initial equivalent section inertia moment I Z It can be obtained through the cross-section calculation formula of 3D software, or through other methods, which are not limited here.

[0061] Step S302: Adjust the parameters of the cross-sectional configuration of the lower beam until a first ratio of the cross-sectional moment of inertia of the cross-sectional configuration of the lower beam after the parameter adjustment to the initial equivalent cross-sectional moment of inertia is less than a second ratio, wherein the second ratio is a ratio between the deflection proportion of the lower beam after the parameter adjustment and the allowable proportion.

[0062] Get the initial equivalent section inertia moment I of the beam under the original single-column stacker model ZFinally, when topologically optimizing the cross-sectional configuration of the lower cross beam, it is necessary to optimize the cross-sectional configuration from the perspective of structural strengthening of the cross-sectional moment of inertia. First, a circular closed surface is constructed according to the structural shape of the lower cross beam, and optimization is performed towards increasing the cross-sectional moment of inertia, and the wall thickness of the lower cross beam is parametrically modeled.

[0063] At this time, the wall thickness of the cross-sectional configuration of the lower cross beam is adjusted, and the cross-sectional inertia moment of the lower cross beam is further strengthened to obtain the cross-sectional inertia moment of the cross-sectional configuration of the lower cross beam after the parameter adjustment. At this time, the cross-sectional inertia moment I of the cross-sectional configuration of the lower cross beam after the parameter adjustment is obtained. Z [i] (i is the number of parameter adjustments) and the initial equivalent section inertia moment I Z Comparative analysis is performed until the first ratio of the section moment of inertia of the cross-sectional configuration of the lower cross beam after parameter adjustment to the initial equivalent section moment of inertia is less than the second ratio, where the second ratio is the ratio between the deflection proportion of the lower cross beam after parameter adjustment and the allowable proportion. When the first ratio of the section moment of inertia of the cross-sectional configuration of the lower cross beam after parameter adjustment to the initial equivalent section moment of inertia is less than the second ratio, the cross-sectional configuration of the lower cross beam and the parameters of the section configuration have been confirmed. At this time, the section moment of inertia of the cross-sectional configuration of the last parameter adjustment is obtained and recorded as I Z [Final].

[0064] That is, in this embodiment, the section moment of inertia I of the cross-sectional configuration of the lower cross beam after parameter adjustment is obtained. Z [i], based on the section moment of inertia I Z [i] and formula (6) to judge the optimization of the cross-sectional configuration until the cross-sectional configuration of the lower beam after parameter adjustment has a cross-sectional inertia moment I z [i] Until the judgment alignment of formula (6) is satisfied, where formula (6) is as follows:

[0065] I Z [i] / I Z ≤λ / [λ] (6)

[0066] Among them, I Z is the initial equivalent section inertia moment, I Z [i] is the section moment of inertia of the cross-sectional configuration of the lower beam after the parameters are adjusted i times, λ is the deflection ratio of the lower beam, and [λ] is the preset allowable ratio.

[0067] Optionally, the cross-sectional configuration of the lower beam is topologically optimized as follows: Figure 5 See Figure 5 , Figure 5 yes Figure 1 The flowchart of the second embodiment of step S103 is as follows: Figure 5 As shown, this embodiment can be Figure 5The method shown implements the step of topologically optimizing the cross-sectional configuration of the lower beam in step S103, and the specific implementation steps include steps S401 to S403:

[0068] Step S401: Determine whether the cross-sectional configuration of the lower beam meets the strengthening requirements.

[0069] When topologically optimizing the cross-sectional configuration of the lower crossbeam, it is first necessary to determine whether the cross-sectional configuration of the lower crossbeam meets the strengthening requirements. When determining whether the current lower crossbeam meets the strengthening requirements, it is first necessary to optimize the direction in which the cross-sectional moment of inertia of the cross-sectional configuration increases, and determine whether the cross-sectional moment of inertia of the cross-sectional configuration during the optimization process satisfies the judgment criteria for the enhanced effect of the cross-sectional moment of inertia in the above formula (6).

[0070] If the above formula (6) is satisfied, that is, the strengthening requirement is met, then the process goes to step S402. If the strengthening requirement is not met, then the cross-sectional configuration of the lower beam is reselected until the strengthening requirement is met.

[0071] Step S402: Obtain the initial equivalent section moment of inertia of the lower beam.

[0072] Step S402 is the same as step S301 and will not be described again.

[0073] Step S403: Adjust the parameters of the cross-sectional configuration of the lower beam until a first ratio of the cross-sectional moment of inertia of the cross-sectional configuration of the lower beam after the parameter adjustment to the initial equivalent cross-sectional moment of inertia is less than a second ratio, wherein the second ratio is a ratio between the deflection proportion of the lower beam after the parameter adjustment and the allowable proportion.

[0074] Step S403 is the same as step S302 and will not be described in detail.

[0075] Optionally, the corner structure of the lower beam is reinforced and optimized as follows Figure 6 See Figure 6 , Figure 6 yes Figure 1 The flowchart of the third embodiment of step S103 is as follows: Figure 6 As shown, this embodiment can be Figure 6 The method shown implements the step of strengthening and optimizing the corner structure of the lower beam in step S103, and the specific implementation steps include steps S501 to S502:

[0076] Step S501: Structural modeling and simulation are performed on the lower cross beam based on the cross-sectional configuration corresponding to the lower cross beam after topology optimization to obtain a simulation deformation value.

[0077] After the topology optimization of the cross-sectional configuration of the lower cross beam is completed, the cross-sectional configuration corresponding to the topology optimized lower cross beam can be structurally modeled, and finite element simulation can be performed to simulate and solve the simulation deformation value to obtain the simulation deformation value [ε].

[0078] Step S502: adjusting the structural parameters of the corner structure of the lower beam so that the simulation deformation value corresponding to the adjusted lower beam meets the preset deformation threshold, and the difference between the cross-sectional moment of inertia of the adjusted lower beam and the cross-sectional moment of inertia corresponding to the lower beam after topology optimization is less than a first preset difference.

[0079] At this time, the structural parameters of the corner structure of the lower beam are adjusted, that is, the corner structure of the lower beam is optimized and adjusted. During the adjustment process, it is necessary to make the simulation deformation value corresponding to the adjusted lower beam meet the preset deformation threshold, and make the section inertia moment of the adjusted lower beam consistent with the section inertia moment I corresponding to the lower beam after topology optimization. Z [Final] is less than the first preset difference. When the above conditions are met, the structural optimization of the lower beam corner structure is completed.

[0080] In this implementation, judgment criterion (7) may be used, and judgment criterion (7) is as follows:

[0081] ε=(0.7-0.9)[ε] (7)

[0082] Among them, ε is the simulation deformation value of the adjusted lower beam (which can be adjusted according to the actual connection requirements of the structure), and [ε] is the simulation deformation value of the lower beam after topology optimization. Among them, 0.7-0.9 can be adjusted according to the actual connection requirements of the structure, which is only exemplary and not limiting.

[0083] Optionally, the present application further proposes a method for optimizing the structure of the lower cross beam, see Figure 7 , Figure 7 1 is a flow chart of the second embodiment of the structural optimization method of the crossbeam in this application. Figure 7 As shown, in this embodiment, the structural optimization method of the lower beam specifically includes steps S601 to S604:

[0084] Step S601: Optimize the structure of the column.

[0085] Before optimizing the structure of the lower beam of the single-column stacker, it is necessary to optimize the structure of the column set above the lower beam. The purpose of optimizing the structure of the column before optimizing the structure of the lower beam is to make the pure column finite element simulation deflection value closer to the theoretical calculation deflection value, in order to avoid affecting the subsequent judgment result of whether to optimize the lower beam.

[0086] Among them, the structural optimization of the column mainly involves optimizing the design of the connection parts of the column structure, and the specific optimization process is described as follows.

[0087] Step S602: Obtain the first theoretical deflection of the column and the second theoretical deflection of the lower beam.

[0088] Step S602 is consistent with step 101 and will not be described again.

[0089] Step S603: Determine whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection.

[0090] Step S603 is consistent with step 102 and will not be described again.

[0091] Step S604: topologically optimize the cross-sectional configuration of the lower cross beam, and reinforce and optimize the corner structure of the lower cross beam.

[0092] Step S604 is consistent with step S103 and will not be described again.

[0093] Optionally, the method for optimizing the structure of the column is as follows: Figure 8 See Figure 8 , Figure 8 yes Figure 7 The flowchart of step S601 in the embodiment is as follows: Figure 8 As shown, this embodiment can be Figure 8 The method shown implements step S601, and the specific implementation steps include steps S701 to S703:

[0094] Step S701: construct a finite element simulation model of the column and obtain a first simulation deflection value of the column.

[0095] As mentioned above, based on the constructed pure column deflection calculation formula (1), the first theoretical deflection of the column f can be obtained: 1 At this time, a pure single-column stacking mechanism including only the columns can be used to establish a finite element simulation model of the column, and determine the geometric parameters, material parameters and external load parameters. At this time, the finite element simulation model of the column of the pure single-column stacking machine is simulated to obtain the first simulation deflection value f of the column. 1 ′.

[0096] Step S702: Determine whether the ratio of the first simulated deflection value to the first theoretical deflection is less than a preset ratio threshold.

[0097] At this time, obtain the first simulation deflection value f 1 ′ and the first theoretical deflection f 1 Ratio And determine the ratio Is it less than the preset ratio threshold?

[0098] If the ratio of the first simulated deflection value to the first theoretical deflection is less than the preset ratio threshold, go to step S703.

[0099] Step S703: Optimizing the design of the connection part of the column until the ratio of the first simulation deflection value to the first theoretical deflection is greater than or equal to a preset ratio threshold.

[0100] If the ratio of the first simulated deflection value to the first theoretical deflection value is less than the preset ratio threshold, the connection part of the column is optimized until the ratio of the first simulated deflection value to the first theoretical deflection value is greater than or equal to the preset ratio threshold. At this time, it can be determined whether the lower beam needs structural optimization.

[0101] In other embodiments, the deflection error n may also be calculated based on the first simulated deflection value and the first theoretical deflection, wherein the calculation formula of the deflection error is shown in (8):

[0102]

[0103] In response to the deflection error n being greater than the preset deflection error, the connection portion of the column is optimized until the deflection error n is less than or equal to the preset deflection error.

[0104] Optionally, based on all the above embodiments, the present application further proposes a method for optimizing the structure of the beam, see Fig. 9 , Fig. 9 1 is a flow chart of the third embodiment of the structural optimization method of the crossbeam in the present application. Fig. 9 As shown, in this embodiment, after the step of strengthening and optimizing the corner structure of the lower cross beam, the structural optimization method of the lower cross beam further includes steps S801 to S804:

[0105] Step S801: Establish a joint model of the reinforced and optimized lower beam and column.

[0106] Based on the foregoing, after the corner structure of the lower cross beam is reinforced and optimized, modeling can be performed based on the reinforced and optimized lower cross beam and the structurally optimized column to establish a joint model of the lower cross beam and the column.

[0107] Step S802: performing finite element simulation on the joint model to obtain a second simulated deflection of the lower beam.

[0108] At this time, the finite element simulation of the joint model with the lower beam can be performed to obtain the second simulation deflection f caused by the lower beam in this joint model. 2 ′.

[0109] Step S803: Obtaining a deflection error based on the second simulated deflection and the second theoretical deflection.

[0110] Based on the formulas (2) and (3) mentioned above, the second theoretical deflection f caused by the lower beam can be calculated 2 ; At this time, the deflection error δ is obtained based on the second simulated deflection and the second theoretical deflection.

[0111] The calculation formula (9) of the deflection error δ is as follows:

[0112]

[0113] Step S804: Strengthen the transition connection between the lower cross beam and the gear train based on the deflection error.

[0114] After obtaining the above-mentioned deflection error δ, the deflection error δ can be compared with the preset deflection error. In response to the deflection error δ being greater than the preset deflection error, the transition connection between the lower beam and the wheel train is strengthened until the deflection error δ is less than or equal to the preset deflection error.

[0115] Specifically, the method for strengthening the transition connection between the lower beam and the gear train based on the deflection error is as follows:

[0116] In response to the deflection error being greater than the preset deflection error, the transition connection portion between the lower beam and the gear train is corrected, and the difference between the cross-sectional moment of inertia of the corrected lower beam and the cross-sectional moment of inertia corresponding to the topologically optimized lower beam is made smaller than a second preset difference, and the deflection error is made smaller than or equal to the preset deflection error.

[0117] That is, in the process of correcting the transition connection between the lower beam and the gear train, it is necessary to make the cross-sectional inertia moment of the corrected lower beam equal to the cross-sectional inertia moment I corresponding to the lower beam after topology optimization. Z [Final] is less than the second preset difference, and the deflection error calculated after modification is less than or equal to the preset deflection error.

[0118] In an application scenario, taking a certain type of single-column stacker (height 32m) as an example, the structure of the lower crossbeam is optimized according to the above-mentioned structure optimization method of the lower crossbeam.

[0119] First, the 3D model of a certain type of single-column stacker needs to be simplified. According to formula (1), formula (2) and formula (3), a finite element model is constructed, and its geometric parameters, material parameters and external load parameters are determined to calculate the first theoretical deflection f of the column. 1 and the second theoretical deflection f caused by the lower beam 2 .

[0120] Secondly, a finite element simulation model of the column is established for a pure single-column stacking mechanism including only the column, and the geometric parameters, material parameters and external load parameters are determined. At this time, the finite element simulation model of the column of the pure single-column stacker is simulated to obtain the first simulation deflection value f′ of the column. 1 At this time, the deflection error of the column is calculated according to formula (8) and the structure of the column is optimized based on the deflection error until the deflection error of the column is less than or equal to the preset deflection error.

[0121] After optimizing the structure of the column, the initial equivalent section inertia moment I of the original single-column stacker model is obtained. Z (Use 3D software to obtain cross-sectional properties).

[0122] According to formulas (1) to (4), the percentage value λ of the deflection component of the lower beam is calculated and compared with the preset allowable percentage [λ]. If λ≦[λ], it is determined that the lower beam does not need to be structurally optimized. If λ>[λ], it is determined that the lower beam needs to be structurally optimized.

[0123] When optimizing the structure of the lower beam, it is necessary to first perform topological optimization on the cross-sectional configuration of the lower beam. Fig.10 , Fig.10 Schematic diagram of an embodiment of the cross-section configuration of the beam in this application. Fig.10 The cross-sectional configurations of the lower cross beam shown in the figure can all be used as structural optimization configurations. Fig.10 (a) is taken as an example. First, according to the design requirements of the lower beam, the width B1 is determined, and the parameters such as height H1 and wall thickness t1 are parameterized. According to the judgment criteria for enhancing the moment of inertia of the cross section, the moment of inertia of the cross section of the lower beam is enhanced under the premise of adjusting the parameters such as height H01 and wall thickness t1. Ensure that the moment of inertia of the cross section is enhanced and meets the judgment criteria shown in formula (6). After repeated judgment, the cross-sectional configuration of the lower beam and the corresponding parameters of the cross-sectional configuration are basically determined, and the moment of inertia of the cross-sectional configuration after the last parameter adjustment is obtained and recorded as I Z [Final].

[0124] After topological optimization of the cross-sectional configuration of the lower cross beam, it is necessary to strengthen and optimize the corner structure of the lower cross beam. At this time, the cross-sectional configuration corresponding to the topologically optimized lower cross beam can be structurally modeled, and finite element simulation can be performed to simulate and solve its simulated deformation value to obtain the simulated deformation value [ε]; then the structural parameters of the corner structure of the lower cross beam are adjusted, that is, the corner structure of the lower cross beam is optimized and adjusted. During the adjustment process, it is necessary to make the simulated deformation value corresponding to the adjusted lower cross beam meet the preset deformation threshold, and make the cross-sectional moment of inertia of the adjusted lower cross beam consistent with the cross-sectional moment of inertia I corresponding to the topologically optimized lower cross beam. Z[Final] is less than the first preset difference. When the above conditions are met, the structural optimization of the lower beam corner structure is completed.

[0125] After the above process is completed, modeling can be performed based on the reinforced optimized lower crossbeam and the structurally optimized column to establish a joint model of the lower crossbeam and the column. At this time, the second simulation deflection and the second theoretical deflection can be used to obtain the deflection error according to formula (9). If the deflection error is greater than the preset deflection error, the transition connection between the lower crossbeam and the gear train is corrected, and the difference between the cross-sectional inertia moment of the corrected lower crossbeam and the cross-sectional inertia moment corresponding to the topologically optimized lower crossbeam is made less than the second preset difference, and the deflection error is made less than or equal to the preset deflection error. When the deflection error is less than or equal to the preset deflection error, the structure of the optimized lower crossbeam is finally determined, and the structural optimization of the lower crossbeam is completed.

[0126] Different from the prior art, the structural optimization method of the lower beam of the present application first obtains the first theoretical deflection of the column and the second theoretical deflection of the lower beam; and determines whether to perform structural optimization on the lower beam based on the first theoretical deflection and the second theoretical deflection; when the lower beam needs to be structurally optimized, the cross-sectional configuration of the lower beam is topologically optimized, and the corner structure of the lower beam is reinforced and optimized. Through the above methods, the present application can use theoretical deflection to theoretically evaluate the structural stiffness of the lower beam, and strengthen the design of the lower beam structure of the single-column stacker by adjusting the cross-sectional configuration and corner structure of the lower beam, providing an accurate and efficient optimization method for the stiffness reinforcement design and quantitative evaluation of the single-column stacker system.

[0127] 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 .

[0128] 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.

[0129] The memory 202 is used to store program data required for the processor 201 to run.

[0130] The processor 201 is further configured to execute the program data stored in the memory 202 to implement any of the above-mentioned methods for optimizing the structure of the lower cross beam.

[0131] 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.

[0132] 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 methods for optimizing the structure of the lower cross beam.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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 lower beam, It is characterized in that Applied to a single-column stacker, the single-column stacker comprises a lower crossbeam and a column, and the structural optimization method of the lower crossbeam comprises: Obtaining a first theoretical deflection of the column and a second theoretical deflection of the lower beam; determining whether to perform structural optimization on the lower cross beam based on the first theoretical deflection and the second theoretical deflection; If so, the cross-sectional configuration of the lower cross beam is topologically optimized, and the corner structure of the lower cross beam is reinforced and optimized.

2. The structural optimization method according to claim 1, It is characterized in that The step of determining whether to perform structural optimization on the lower cross beam based on the first theoretical deflection and the second theoretical deflection includes: Obtaining a deflection ratio of the lower beam based on the first theoretical deflection and the second theoretical deflection; In response to the deflection ratio of the lower cross beam being greater than a preset allowable ratio, it is determined that the structure of the lower cross beam needs to be optimized.

3. The structural optimization method according to claim 2, It is characterized in that The step of topologically optimizing the cross-sectional configuration of the lower cross beam comprises: Obtaining the initial equivalent section moment of inertia of the lower beam; The parameters of the cross-sectional configuration of the lower cross beam are adjusted until a first ratio of the cross-sectional moment of inertia of the cross-sectional configuration of the lower cross beam after the parameter adjustment to the initial equivalent cross-sectional moment of inertia is less than a second ratio, wherein the second ratio is a ratio between the deflection proportion of the lower cross beam after the parameter adjustment and the allowable proportion.

4. The structural optimization method according to claim 3, It is characterized in that Before adjusting the parameters of the cross-sectional configuration of the lower cross beam, the step of topologically optimizing the cross-sectional configuration of the lower cross beam further includes: Determining whether the cross-sectional configuration of the lower cross beam meets the strengthening requirements; In response to the cross-sectional configuration of the lower beam meeting the strengthening requirement, a step of topologically optimizing the cross-sectional configuration of the lower beam is performed.

5. The structural optimization method according to claim 3, It is characterized in that The step of strengthening and optimizing the corner structure of the lower cross beam comprises: Performing structural modeling and simulation on the lower cross beam based on the cross-sectional configuration corresponding to the lower cross beam after topology optimization to obtain a simulation deformation value; The structural parameters of the corner structure of the lower cross beam are adjusted so that the simulation deformation value corresponding to the adjusted lower cross beam meets the preset deformation threshold, and the difference between the cross-sectional moment of inertia of the adjusted lower cross beam and the cross-sectional moment of inertia corresponding to the lower cross beam after topology optimization is less than a first preset difference.

6. The structural optimization method according to claim 1, It is characterized in that Before the step of determining whether to perform structural optimization on the lower cross beam based on the first theoretical deflection and the second theoretical deflection, the structural optimization method further includes: The structure of the column is optimized.

7. The structural optimization method according to claim 6, It is characterized in that The step of optimizing the structure of the column comprises: Constructing a finite element simulation model of the column and obtaining a first simulation deflection value of the column; Determining whether a ratio of the first simulated deflection value to the first theoretical deflection is less than a preset ratio threshold; If so, the connection part of the column is optimized and designed until the ratio of the first simulated deflection value to the first theoretical deflection is greater than or equal to the preset ratio threshold.

8. The structural optimization method according to claim 1, It is characterized in that The structural optimization method further comprises: Establishing a joint model of the lower cross beam and the column after reinforcement and optimization; Performing finite element simulation on the joint model to obtain a second simulated deflection of the lower beam; Obtaining a deflection error based on the second simulated deflection and the second theoretical deflection; The transition connection portion between the lower cross beam and the gear train is strengthened based on the deflection error.

9. The structural optimization method according to claim 8, It is characterized in that The step of strengthening the transition connection portion between the lower cross beam and the gear train based on the deflection error comprises: In response to the deflection error being greater than a preset deflection error, the transition connection portion between the lower cross beam and the gear train is corrected, and the difference between the cross-sectional moment of inertia of the corrected lower cross beam and the cross-sectional moment of inertia corresponding to the lower cross beam after topology optimization is made smaller than a second preset difference, and the deflection error is made smaller than or equal to the preset deflection error.

10. 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 structural optimization method of the lower beam described in any one of claims 1-9.

11. A computer-readable storage medium, It is characterized in that Program instructions are stored therein, and the program instructions are executed to implement the structural optimization method of the lower cross beam described in any one of claims 1-9.

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