CN112214810B - Packaged product strength simulation method, system, computer equipment and storage medium - Google Patents
Packaged product strength simulation method, system, computer equipment and storage medium Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 57
- 238000013515 script Methods 0.000 claims abstract description 42
- 238000007781 pre-processing Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims description 30
- 238000004364 calculation method Methods 0.000 claims description 16
- 238000004590 computer program Methods 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 4
- 238000012545 processing Methods 0.000 abstract description 6
- 230000006870 function Effects 0.000 abstract description 2
- 238000012805 post-processing Methods 0.000 abstract description 2
- 238000009450 smart packaging Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 4
- 238000012356 Product development Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G06F30/12—Geometric CAD characterised by design entry means specially adapted for CAD, e.g. graphical user interfaces [GUI] specially adapted for CAD
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- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/20—Packaging, e.g. boxes or containers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
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Abstract
The invention belongs to the technical field of intelligent packaging, and discloses an automatic simulation method, a simulation system and a storage medium pack for the strength of a packaged product, wherein model simplification processing is carried out, and product stress analysis is carried out first; establishing a rule relation by uniformly writing scripts, and carrying out automatic pretreatment on the model by utilizing pretreatment software; setting selectable material types in advance in a material setting interface in a platform, and setting specific properties of each material to realize material property giving; directly calling mature finite element software through a written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report; and writing a script, and utilizing post-processing software to check and analyze results. And the flow and the setting mode are standardized by developing a simulation analysis platform. The preprocessing, solving and post-processing functions are automatically realized, the technical threshold of simulation analysis is reduced, the product simulation analysis is carried out by common designers, and the range of simulation operators is enlarged.
Description
Technical Field
The invention belongs to the technical field of intelligent packaging, and particularly relates to a packaged product strength simulation method, a packaged product strength simulation system, computer equipment and a storage medium.
Background
At present, from the view of the process of carrying out product stacking, clamping and holding and structural strength simulation analysis by adopting finite element calculation, the whole process consumes very long time, has high requirements on equipment and simulation knowledge, and can not meet the progress requirement by simulation analysis when the existing product development flow is used, thus having obvious hysteresis and being not obvious enough in effect.
Through the above analysis, the problems and defects existing in the prior art are as follows: in the prior art, finite element calculation is adopted for operation, the whole process consumes long time and has high requirements on equipment and simulation knowledge, so that when the existing product development flow is used, the simulation analysis cannot meet the progress requirement, and the method has obvious hysteresis and is not obvious enough in effect.
The meaning of solving the problems and the defects is as follows: the method has the advantages that the existing simulation software part modules are subjected to secondary development, standardization, modularization and automation, so that the use threshold of the software is reduced, the application efficiency is improved, all designers can use the tool to check in the product design stage, before product casting and die changing, the feasibility of a design scheme and a change scheme can be simulated and verified rapidly and effectively, the aim of gradually canceling part of physical experiments is fulfilled, the experiment cost is saved, and meanwhile, reliable theoretical data reference is provided for design and change.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a packaged product strength simulation method, a system, computer equipment and a storage medium. The whole simulation analysis process is subjected to flow, standardization and standardization setting in a platform mode, so that the reliability of a simulation result is ensured; the simulation analysis process, such as preprocessing, is automated by utilizing scripts for software secondary development, so that the time for preprocessing the simulation is greatly saved.
The invention is realized in such a way that the automatic simulation method for the strength of the packaged product comprises the following steps:
the analysis of the need for such a device, carrying out model simplification treatment, and carrying out product stress analysis;
establishing a rule relation by uniformly writing scripts, and carrying out automatic pretreatment on the model by utilizing pretreatment software;
Setting selectable material types in advance in a material setting interface in a platform, and setting specific properties of each material to realize material property giving;
directly calling mature finite element software through a written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report;
and writing a script, and utilizing post-processing software to check and analyze results.
Further, the demand analysis includes: the parts and areas of the analysis product can be stressed, limited stress and no stress can be applied.
Further, in demand analysis, after model simplification processing is performed on the packaged product according to the structural strength and stress characteristics of the product, an effective finite element mechanical model, namely an object for simulation analysis, is established, and the simplified product and package are included.
Further, after the demand analysis, the mechanical stress model is combined, and a stress loading mode and a part analysis object are defined.
Furthermore, the analysis object is based on the coordinate relation of the three-dimensional assembly model, the Z axis is used as a reference coordinate, the Z axis and the height direction of the product are established as stress loading directions by utilizing the script of the writing computer, and the loading direction matching is realized.
Further, the automated pretreatment includes: model simplification, material property assignment, meshing, contact setting, and load loading.
Further, for packaging foam, the automatic pretreatment deletes the characteristics with no influence on the calculation result so as to achieve the purpose of simplifying the model.
Further, the automatic preprocessing deletes the feature with insignificant calculation result by combining the problem points to be analyzed for the structural parts.
Further, after all simulation settings are completed through MECHANICAL APDL software, the simulation analysis report converts the setting process and the relation into a command stream which can be identified by APDL software by utilizing a script relation, and a user executes an operation calculation command and then automatically executes a calculation result.
Further, the results of the post-processing software include stress and strain parameters of the product and package.
Another object of the present invention is to provide an automatic simulation system of strength of a packaged product, the automatic simulation system of strength of a packaged product comprising:
The product stress analysis module is used for performing model simplification treatment and performing product stress analysis;
the automatic preprocessing module establishes a rule relation by uniformly writing a script, and utilizes preprocessing software to automatically preprocess the model;
The attribute setting module is used for setting selectable material types in advance through a material setting interface in the platform, and setting specific attributes of the materials for each material to realize material attribute giving;
the result solving and analyzing module is used for directly calling mature finite element software to complete automatic model solving and analyzing through the written script and customizing and generating a modularized simulation analysis report; and writing a script, and utilizing post-processing software to check and analyze results.
It is a further object of the present invention to provide a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of:
Carrying out model simplification treatment, and carrying out product stress analysis;
establishing a rule relation by uniformly writing scripts, and carrying out automatic pretreatment on the model by utilizing pretreatment software;
Setting selectable material types in advance in a material setting interface in a platform, and setting specific properties of each material to realize material property giving;
directly calling mature finite element software through a written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report;
and writing a script, and utilizing post-processing software to check and analyze results.
Another object of the present invention is to provide a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of
Carrying out model simplification treatment, and carrying out product stress analysis;
establishing a rule relation by uniformly writing scripts, and carrying out automatic pretreatment on the model by utilizing pretreatment software;
Setting selectable material types in advance in a material setting interface in a platform, and setting specific properties of each material to realize material property giving;
directly calling mature finite element software through a written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report;
and writing a script, and utilizing post-processing software to check and analyze results.
By combining all the technical schemes, the invention has the advantages and positive effects that:
first, the flow and the setting mode are standardized by developing a simulation analysis platform.
Secondly, the preprocessing, solving and post-processing functions are automatically realized, the technical threshold of simulation analysis is reduced, the product simulation analysis is carried out by common designers, and the range of simulation operators is enlarged.
Thirdly, various parameters such as stress and strain of the product can be obtained rapidly and accurately, and further the safety of the product can be analyzed, so that the design quality is improved, the product development period is shortened, and the test cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for automatically simulating the strength of a packaged product according to an embodiment of the present invention.
Fig. 2 is a diagram showing a manual simulation analysis process of a conventional stacking and clamping process of packaged products.
Fig. 3 is an operation chart of a conventional packaged product stacking and clamping process analysis process.
Fig. 4 is a schematic diagram of a simulation analysis package provided by an embodiment of the present invention.
Fig. 5 is a schematic diagram of implementing load direction matching according to an embodiment of the present invention.
FIG. 6 is a processing diagram of a part implemented by HYPERMESH software provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Aiming at the problems existing in the prior art, the invention provides a method, a system, computer equipment and a storage medium for simulating the strength of a packaged product, which have high reliability, namely stacking and clamping simulation analysis processes. The present invention will be described in detail with reference to the accompanying drawings.
The invention develops and establishes a simulation operation platform, and the platform is divided into three parts: the method comprises the steps of demand analysis, preprocessing and solution analysis, wherein each part has specific operation, setting guide and part setting is normalized through the form of options. Through software secondary development, script writing and preprocessing software is used for carrying out automatic preprocessing on the model, and the operations such as material attribute, grid division, constraint setting, contact setting, load setting and the like are normalized and standardized by utilizing rules established by a platform, so that accuracy of a calculation result is ensured.
As shown in fig. 1, the method for automatically simulating the strength of a packaged product according to the embodiment of the invention comprises the following steps:
A demand analysis stage: for better model simplification, the stress analysis of the product is firstly carried out
(Stress analysis means that whether the packaged product belongs to a stacking process or a clamping process is judged by people, and stress states of parts of the packaged product and the packaged product per se are analyzed under the two conditions, so that a finite element model is built), and the parts and areas of the packaged product per se are required to be analyzed, such as stress, limited stress, no stress and the like; after the model simplification treatment is carried out on the packaged product according to the structural strength and the stress characteristics of the product, an effective finite element mechanical model is established, namely the object for simulation analysis comprises the simplified product and package, and the following diagram is exemplified.
Based on BOM table information of the three-dimensional simulation model of the product and the package, the information can be directly grabbed from the BANN system, a certain rule is established to realize the corresponding relation among the material names, the material codes, the material materials and the quantity, and the rule specifically utilizes the uniqueness of the material codes to map all the material attribute relations in the BANN system to the BOM table information of the three-dimensional simulation model of the simulation analysis platform without manual input.
Parts irrelevant to the mechanical stress model are deleted, so that the time and computer resources for model preprocessing and simulation calculation are saved, and parts required by simulation are automatically extracted through an associated PLM system. Specifically, the non-stressed parts which are not relevant to the simulation analysis are deleted.
Meanwhile, the mechanical stress model is combined, and the stress loading mode and the part analysis object are defined. The implementation mode is as follows: according to the coordinate relation of the three-dimensional assembly model, the Z axis is used as a reference coordinate, the Z axis is established by utilizing the script of the computer, and the height direction of the product is used as the loading direction of stress, so that the loading direction is matched.
And establishing a rule relation by uniformly writing scripts, and carrying out automatic preprocessing (comprising operations such as model simplification, material attribute giving, grid division, contact setting, load loading and the like) on the model by utilizing preprocessing software.
The invention will be further described with reference to specific examples.
Examples
1) For packaging foam, some features that do not affect the results of the calculation need to be deleted to simplify the model, such as some rounding, theft of materials, etc.
2) For structural parts, deleting some characteristics which are irrelevant to the calculation result by combining the problem points to be analyzed, for example, removing some boss characteristics and rounded corner characteristics on the parts without influencing the whole stacking result, and the method is as follows. The process is mainly realized by HYPERMESH software, model features needing simplifying processing are classified and input into a software background in advance by utilizing a Tcl script in HYPERMESH, and a command of model simplifying processing is automatically executed after a three-dimensional model is imported into HYPERMESH.
Material property assignment, by pre-setting selectable material categories at the material setup interface in the platform, and performing specific property settings of the material, such as poisson's ratio, elasticity model, material density, yield strength, etc., for each material, the specific material is sourced from the BANN system.
Meanwhile, each link of model simplification, material attribute giving, grid division, contact setting, load loading and the like in the pretreatment process is subjected to manual detection and system self-checking so as to ensure that the quality of the pretreatment link is effectively ensured, the system self-checking is mainly realized by utilizing the pretreatment quality requirement of software, for example, the grid division quality can be realized by the grid quality judgment of the software, and the manual detection is carried out one by one through simulation analysis standard points.
And then directly calling mature finite element software through the written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report. The process is mainly realized by MECHANICAL APDL software, after all simulation settings are completed, the setting process and the relation are converted into a command stream which can be identified by APDL software by utilizing script relation, and a user executes an operation calculation command and then automatically executes a calculation result.
Finally, script is written, and the post-processing software is used for checking results and analyzing results (including various parameters such as stress and strain of products and packages).
In the present invention, fig. 2 is a diagram showing a manual simulation analysis process of a conventional stacking and clamping process of packaged products.
Fig. 3 is an operation chart of a conventional packaged product stacking and clamping process analysis process.
Fig. 4 is a schematic diagram of a simulation analysis package provided by an embodiment of the present invention.
Fig. 5 is a schematic diagram of implementing load direction matching according to an embodiment of the present invention.
FIG. 6 is a processing diagram of a part implemented by HYPERMESH software provided by an embodiment of the present invention. Fig. 6 (a) is a view of the water pan treatment. FIG. 6 (b) packaging foam product effect diagram
In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," "tail," and the like are used as an orientation or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the invention is not limited thereto, but any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention will be apparent to those skilled in the art within the scope of the present invention.
Claims (8)
1. The automatic simulation method for the strength of the packaged product is characterized by comprising the following steps of:
Demand analysis: carrying out model simplification treatment, and carrying out product stress analysis;
establishing a rule relation by uniformly writing scripts, and carrying out automatic pretreatment on the model by utilizing pretreatment software;
Setting selectable material types in advance in a material setting interface in a platform, and setting specific properties of each material to realize material property giving;
directly calling mature finite element software through a written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report;
Writing a script, and utilizing post-processing software to check and analyze results;
The product stress analysis comprises the following steps: the parts and the areas of the product are analyzed to be stressed, limited stress and no stress can be applied; the product stress analysis refers to judging whether the packaged product belongs to a stacking process or a clamping process, and analyzing stress states of parts of the packaged product and the product under two conditions;
After the stress analysis of the product, determining a stress loading mode and a part analysis object by combining an analyzed mechanical stress model;
The implementation mode is as follows: according to the coordinate relation of the three-dimensional assembly model, the Z axis is used as a reference coordinate, the Z axis is established by utilizing the script of the computer, and the height direction of the product is used as the loading direction of stress, so that the loading direction is matched.
2. The automatic simulation method for the strength of the packaged product according to claim 1, wherein in the demand analysis, after the model simplification treatment is carried out on the packaged product according to the structural strength and the stress characteristics of the product, an effective finite element mechanical model is established, and the simulation analysis report corresponds to the simulation analysis object containing the simplified product and package.
3. The method for automated simulation of strength of a packaged product according to claim 1, wherein the automated pretreatment comprises: model simplification, material property assignment, meshing, contact setting, and load loading.
4. The automatic simulation method for the strength of a packaged product according to claim 3, wherein the automatic preprocessing is used for deleting the characteristics which have no influence on the calculation result of the packaged foam so as to achieve the purpose of simplifying a model;
and the automatic preprocessing deletes the characteristics of the structural parts, which are irrelevant to the calculation result, by combining the problem points to be analyzed.
5. The automatic simulation method of the strength of the packaged product according to claim 1, wherein the simulation analysis report converts the setting process and the relation into a command stream which can be identified by the APDL software by utilizing a script relation after all simulation settings are completed by MECHANICAL APDL software, and a user executes the calculation result automatically after executing the operation calculation command;
the results of the post-processing software include stress and strain parameters of the product and package.
6. An automatic simulation system for the strength of a packaged product, characterized in that the automatic simulation system for the strength of the packaged product comprises:
The product stress analysis module is used for demand analysis: carrying out model simplification treatment, and carrying out product stress analysis;
the automatic preprocessing module establishes a rule relation by uniformly writing a script, and utilizes preprocessing software to automatically preprocess the model;
The attribute setting module is used for setting selectable material types in advance through a material setting interface in the platform, and setting specific attributes of the materials for each material to realize material attribute giving;
The result solving and analyzing module is used for directly calling mature finite element software to complete automatic model solving and analyzing through the written script and customizing and generating a modularized simulation analysis report; writing a script, and utilizing post-processing software to check and analyze results;
The product stress analysis comprises the following steps: the parts and the areas of the product are analyzed to be stressed, limited stress and no stress can be applied; the product stress analysis refers to judging whether the packaged product belongs to a stacking process or a clamping process, and analyzing stress states of parts of the packaged product and the product under two conditions;
After the stress analysis of the product, determining a stress loading mode and a part analysis object by combining an analyzed mechanical stress model;
The implementation mode is as follows: according to the coordinate relation of the three-dimensional assembly model, the Z axis is used as a reference coordinate, the Z axis is established by utilizing the script of the computer, and the height direction of the product is used as the loading direction of stress, so that the loading direction is matched.
7. A computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of:
Demand analysis: carrying out model simplification treatment, and carrying out product stress analysis;
establishing a rule relation by uniformly writing scripts, and carrying out automatic pretreatment on the model by utilizing pretreatment software;
Setting selectable material types in advance in a material setting interface in a platform, and setting specific properties of each material to realize material property giving;
directly calling mature finite element software through a written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report;
Writing a script, and utilizing post-processing software to check and analyze results;
The product stress analysis comprises the following steps: the parts and the areas of the product are analyzed to be stressed, limited stress and no stress can be applied; the product stress analysis refers to judging whether the packaged product belongs to a stacking process or a clamping process, and analyzing stress states of parts of the packaged product and the product under two conditions;
After the stress analysis of the product, determining a stress loading mode and a part analysis object by combining an analyzed mechanical stress model;
The implementation mode is as follows: according to the coordinate relation of the three-dimensional assembly model, the Z axis is used as a reference coordinate, the Z axis is established by utilizing the script of the computer, and the height direction of the product is used as the loading direction of stress, so that the loading direction is matched.
8. A computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of
Demand analysis: carrying out model simplification treatment, and carrying out product stress analysis;
establishing a rule relation by uniformly writing scripts, and carrying out automatic pretreatment on the model by utilizing pretreatment software;
Setting selectable material types in advance in a material setting interface in a platform, and setting specific properties of each material to realize material property giving;
directly calling mature finite element software through a written script to complete automatic solving and analyzing of the model, and customizing to generate a modularized simulation analysis report;
Writing a script, and utilizing post-processing software to check and analyze results;
The product stress analysis comprises the following steps: the parts and the areas of the product are analyzed to be stressed, limited stress and no stress can be applied; the product stress analysis refers to judging whether the packaged product belongs to a stacking process or a clamping process, and analyzing stress states of parts of the packaged product and the product under two conditions;
After the stress analysis of the product, determining a stress loading mode and a part analysis object by combining an analyzed mechanical stress model;
The implementation mode is as follows: according to the coordinate relation of the three-dimensional assembly model, the Z axis is used as a reference coordinate, the Z axis is established by utilizing the script of the computer, and the height direction of the product is used as the loading direction of stress, so that the loading direction is matched.
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