CN105718629A - Variant design method of meeting engineering constraint conditions - Google Patents
Variant design method of meeting engineering constraint conditions Download PDFInfo
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Abstract
The invention discloses a variant design method of meeting engineering constraint conditions. The method comprises the steps as follows: a parameterized three-dimensional model is built; a parameterized variant design user interface is developed; model data is imported into an Excel; parameters and an APDL command stream are compiled; CAD and CAE model parameters are input into the user interface; the data in the Excel and the APDL command stream are automatically read, modified and updated; variant design is carried out; a background starts CAE software to automatically read the data in the Excel table and the APDL command stream, to build a model, to parameterize CAE analysis and to output the result; whether the engineering constraints are met or not is judged; the parameters are automatically modified and analyzed until the result meets the engineering constraints; the result is automatically returned to CAD software to generate a new model; the final result is output; and a data file is stored. Parameterized modeling and rapid variant design of parts are achieved; the problem of variant design which does not need manual intervention and meets the engineering constraint conditions is solved; the analysis efficiency is greatly improved; the product design cycle is shortened; and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of variant design method meeting engineering constraints, particularly relate to a kind of variant design method meeting engineering constraints.
Background technology
Along with the competition in market increasingly sharpens, the application of Variant Design technology is increasingly extensive.Product Variant Design is according to design objective requirement, when ensureing that overall 26S Proteasome Structure and Function is constant, existing similar products or module carries out the variation of partial structurtes or size, designs the process of new product.Most Variant Design technology is just for the size design of product geometry, and have ignored the practical application meaning of product, lacks product judgement of the engineering constraints such as rigidity, intensity under various operating modes, it is difficult to ensure the reliability of product in Variant Design.In recent years, CAE technology has become as the main path solving project analysis problem, adopt this technology that the key structure performances such as the rigidity under the various work operating mode of product, intensity stabilization reliability and safe and reliable sex chromosome mosaicism are analyzed evaluation and test, just can find design defect in the design phase equally and process in time.Therefore, CAD/CAE integrated technology is that the research of the variant design method meeting engineering constraints provides new thinking.
CAD/CAE is integrated is the new technique in current CAE field, is a kind of inexorable trend of CAD and CAE field development.It takes full advantage of each systematic difference function, by certain integration mode, it is achieved that the automation process that " design-evaluate-redesign " operates, and shortens the product development and design cycle, it is ensured that the performance of product design, improves the quality of product.The problems such as the meeting property of engineering specifications that can be efficiently solved the finite element analysis of Parameterized product design, Optimal Structure Designing and Variant Design by CAD/CAE integrated technology.But application integrated for CAD/CAE also has the place that some are unsatisfactory.CAD software completing Parameters of The Parts three-dimensional modeling and Variant Design, then carries out CAE software analysis, meeting the requirements if analyzing result, then complete design；Otherwise need the parameter in part product model is modified, at this moment need again to model, and by hand FEM (finite element) model is modified, and some information processes remain on too busy to get away loaded down with trivial details manual procedure, operation inconvenience, inefficiency, it is difficult to meet engineering demand.It is proposed that a kind of variant design method meeting engineering constraints, for solving the Variant Design problem meeting engineering constraints without wanting manual intervention, shorten the design cycle, improve modeling efficiency and have great importance with simulation accuracy etc..
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that a kind of variant design method meeting engineering constraints.This method can set up phantom efficiently, accurately, and is applied to simulation analysis, and convenient circulation repeatability is analyzed, and solves the Variant Design problem meeting engineering constraints without wanting manual intervention.
Realize the technical scheme that the object of the invention adopts:
A kind of variant design method meeting engineering constraints, comprises the following steps:
(1) according to the demand of client and design, mechanical system component structural performance is carried out preliminary analysis, go forward side by side line parameter analysis, extraction；The Solidworks of CAD software sets up the parametrization threedimensional model of part；
(2) being developing instrument based on VC++, Solidworks carries out secondary development, build parametric and variant design user interface, the performed step at described interface includes the input of geometric model parameter；CAE model parameter inputs；Backstage starts ANSYS, reads Excel list data and performs the APDL command stream that step (3) is write；
(3) model parameter is imported in Excel, and in Excel, write APDL command stream；Wherein, in the user interface during amendment parameter, in Excel, data are automatically revised, are updated；When revising parameter in Excel, SolidWorks also can read Excel data model modification automatically；
(4) inputting geometric parameter and cae analysis parameter in parametric and variant design user interface, Excel list data and APDL command stream are read out, revise and update according to input parameter by SolidWorks, and then threedimensional model is carried out Variant Design；
(5) in parametric and variant design user interface, backstage starts ANSYS, automatically read the data in the Excel form after updating and APDL command stream and perform APDL command stream file, setting up parametrization cae analysis model, carry out parametrization cae analysis and export result；Wherein, if revising parameter in Excel, APDL command stream file can be regenerated, and ANSYS reads the data in amended Excel form automatically and APDL command stream is modeled and analyzes；
(6) according to cae analysis result, it may be judged whether meet Engineering constraint；If being unsatisfactory for Engineering constraint, returning step (4) and automatically carrying out parameter modification, circulation step (4), (5), (6) are until meeting engineering constraints, if meeting Engineering constraint to carry out next step；
(7), in result auto-returned CAD software, model modification, Excel table update, output result also preserves data file.
Further, step (1) described parameter includes the variable element of part, derived parameter and invariant parameter, is also classified into geometric parameter, physical parameter, mechanics parameter and cae analysis parameter.
Further, the APDL command stream described in step (3) is write code according to the form of APDL code in Excel, and wherein comma need not input；Due to Excel self the powerful computing function having, the APDL code write under Excel environment need not use * DO, * ENDDO loop command.
Further, SolidWorks described in step (3) reads Excel data and carries out model modification, input parameter specifically by Excel, utilize Excel form ActiveX control and realize the amendment of SolidWorks moulded dimension in conjunction with SolidWorks macroefficiency and update.Wherein, Excel2003 preserves form is .xls form.
Further, described APDL command stream file includes finite element modeling, cell type, material properties, stress and strain model, constrained, applying boundary condition and load, is analyzed, and derives neutral file.Wherein, APDL macro document is .mac file.
Further, the Variant Design step described in step (4) includes as follows:
1) labor Parameters of The Parts, starts Solidworks；
2) according to the association between each size of part, it is determined that the restriction relation between each parameter, and set up the restriction relation formula between parameter, and then build parametrization threedimensional model；
3) setting up Variant Design module, the Variant Design module that utilization is set up extracts the dimensional parameters in part model and constraint relational expression rapidly；
4) amendment dimensional parameters, restriction relation formula, part modification；
5) preservation model and data file.
Further, the parametrization cae analysis model of setting up described in step (5) is: ANSYS reads and Excel list data is read in array, with data modeling in array.
Wherein, MWRITE, ParP, Fname, Ext,--, label, n1, n2, this readable array of order of n3
VWRITE, Par1, Par2, Par3 ..., this readable single numerical value of order of Par19
Further, described cae analysis step includes as follows:
1) backstage starts finite element analysis software ANSYS；
2) according to demand, the geometric parameter in APDL command stream file and cae analysis parameter are carried out parametrization, sets up FEM (finite element) model；
3) definition unit type, material properties, stress and strain model；
4) applying edge-restraint condition and load, wherein the constraint suffered by part includes that one end is fixed, two ends are fixed, rotates or translation, and load includes cutting force, pulling force or moment of torsion；
5) carrying out solving analysis, result is analyzed in output, exits ANSYS.
Further, described geometric parameter includes overall dimensions and load position, and cae analysis parameter includes size of mesh opening, magnitude of load and material properties, and wherein material properties includes elastic modelling quantity, Poisson's ratio and density of material.
Advantages of the present invention is: the variant design method meeting engineering constraints of the application present invention can realize the automation process that " design-analyze-evaluate-redesign " operates, utilize the interface set up and interface routine can realize parametric modeling, the automatic Variant Design of model；Make full use of the powerful formula calculating of Excel form, parameter input intuitively, convenient data maintenance function, realize the parametrization of product, Seriation Design；ANSYS software reads Excel list data and APDL command stream carries out parametric modeling and analysis, automatically revises parameter, analyzes until output meets the result of Engineering constraint, solves loaded down with trivial details circulation repeatability problem analysis, shorten the research and development of products cycle；Reconstruction model in final analysis result auto-returned CAD software, Excel updates, and model parameter amendment and APDL code batch modification is convenient；Whole process, without manual intervention, solves the Variant Design problem meeting engineering constraints, improves efficiency, shorten the design cycle have good engineer applied be worth.
Accompanying drawing explanation
Fig. 1 is a kind of variant design method flow chart meeting engineering constraints of the present invention；
Fig. 2 is variant of the invention design flow diagram；
Fig. 3 is the cae analysis flow chart of the present invention；
Fig. 4 is the parametric and variant design user interface map of the axle of the embodiment of the present invention；
Fig. 5 is the static analysis result figure of the axle of the embodiment of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the particular content of the present invention is described further, but the specific embodiment of the present invention is not limited to this.
A kind of variant design method meeting engineering constraints, including step be: Solidworks Parametric three-dimensional modeling, development parameters Variant Design user interface, Excel write model parameter and APDL command stream and revise according to user-interface parameters input and update, backstage starts the Excel modeling after ANSYS reads renewal automatically and analyzes, automatically amendment parameter with analyze until output meets the result of Engineering constraint, result return CAD Remodeling Model and the renewal of Excel data, Fig. 1 is its broad flow diagram, specifically comprises the following steps that
(1) Parameters of The Parts is analyzed by the demand according to client and design, as to an output shaft, restriction relation between the length of each shaft part, diameter and each axial length or the diameter of axle is analyzed, wherein parameter mainly includes length or diameter etc., sets up the parametrization threedimensional model of part in the Solidworks of CAD software；
(2) being developing instrument based on VC++, Solidworks carries out secondary development, build parametric and variant design user interface, the performed step at described interface includes the input of geometric model parameter；CAE model parameter inputs；Backstage starts ANSYS, reads Excel list data and performs the APDL command stream that step (3) is write；
(3) model parameter is imported in Excel, and in Excel, write APDL command stream file.When writing APDL command stream file, writing code according to the form of APDL code in Excel, wherein comma need not input；Due to Excel self the powerful computing function having, the APDL code write under Excel environment need not use * DO, * ENDDO loop command.Wherein, in the user interface during amendment parameter, in Excel, data are automatically revised, are updated；When Excel revises parameter, SolidWorks also can automatically read Excel data and carry out model modification, SolidWorks reads Excel data and carries out the concrete grammar of model modification for input parameter by Excel, utilizes Excel form ActiveX control and realizes the amendment of SolidWorks moulded dimension and renewal in conjunction with SolidWorks macroefficiency.Wherein, Excel2003 preserves form is .xls form.The APDL command stream file write includes finite element modeling, cell type, material properties, stress and strain model, constrained, applying boundary condition and load, is analyzed, and derives neutral file.Wherein, APDL macro document is .mac file.
(4) the cae analysis parameter such as geometric parameter and size of mesh opening, imposed load and material properties such as input restriction relation between overall dimensions, parameter in parametric and variant design user interface, wherein material properties includes: elastic modelling quantity, Poisson's ratio, density of material, according to input parameter, Excel list data and APDL command stream are read out, revise and update, and then threedimensional model is carried out Variant Design；Described Variant Design step is as in figure 2 it is shown, include as follows:
1) labor Parameters of The Parts, starts Solidworks；
2) according to the association between each size of part, it is determined that the restriction relation between each parameter, and set up restriction relation formula, and then build parametrization threedimensional model；
3) setting up Variant Design module, the Variant Design module that utilization is set up extracts the dimensional parameters in part model and constraint relational expression rapidly；
4) amendment dimensional parameters, restriction relation formula, part modification；
5) model after modification and data file are preserved.
(5) in parametric and variant design user interface, backstage starts ANSYS, automatically read the data in the Excel form after updating and APDL command stream and perform APDL command stream file, setting up parametrization cae analysis model, carry out parametrization cae analysis and export result.Described cae analysis step such as Fig. 3, including as follows:
1) backstage starts finite element analysis software ANSYS；
2) according to demand, the geometric parameter in APDL command stream file and cae analysis parameter are carried out parametrization, sets up FEM (finite element) model；
3) definition unit type, material properties, stress and strain model；
4) applying edge-restraint condition and load, wherein the constraint suffered by part includes that one end is fixed, two ends are fixed, rotates or translation, and load includes cutting force, pulling force or moment of torsion；
5) carrying out solving analysis, result is analyzed in output, exits ANSYS.
Wherein, as revised parameter in Excel, APDL command stream file can be regenerated, and ANSYS reads the data in amended Excel form automatically and APDL command stream is modeled and analyzes；
(6) according to cae analysis result, it may be judged whether meet Engineering constraint, such as the condition such as rigidity, intensity；If being unsatisfactory for Engineering constraint, returning step (4) and automatically carrying out parameter modification, circulation step (4), (5), (6) are until meeting engineering constraints, if meeting Engineering constraint to carry out next step；
(7), in result auto-returned CAD software, model modification, Excel table update, output result also preserves data file.
Cae analysis basic process described in Fig. 1 and Fig. 3 is broadly divided into pre-treatment, solves and last handling process.Pre-treatment refers to sets up process to FEM (finite element) model, including creating or input geometric model, definition material attribute, definition unit type, dividing the contents such as finite element grid；Solution procedure refers to contents such as model being carried out imposed load and constraint, solve；Namely last handling process is to look at analyzing the process of result, including checking the content such as correctness analyzing and showing result and assay.
Below according to simple single multidiameter be example so that the detailed process of the method to be described:
(1) parameter of this list multidiameter is analyzed: parameter includes the diameter of axle and axial length, it is derived parameter (derived parameter refers to that namely the parameter that the calculating by other parameters obtains indirectly indirectly controls the parameter of some planform by setting up certain association between parameter) with diameter of axle D for variable element (variable element refers to the parameter that part can change in alternative process, namely can the parameter of direct Controlling model planform characteristic variations), axial length L, sets restriction relation formula as L=2D；Then in Solidworks, set up the parametrization threedimensional model of axle；
(2) it is developing instrument based on VC++, Solidworks is carried out secondary development, the parametric and variant design user interface of structure axle as described in Figure 4, the performed step at described interface includes the input of cad model parameter, the input of CAE model parameter, engineering constraints input, backstage startup ANSYS, if inputting the diameter of axle in interface to then click on model and live again button, then cad model updates；
(3) shaft model parameter is imported in Excel, and in Excel, write APDL command stream.Wherein, in the user interface during amendment parameter, in Excel, data are automatically revised, are updated；When revising parameter in Excel, SolidWorks also can read Excel data model modification automatically；
(4) in the parametric and variant design user interface of axle, cad model parameter (diameter of axle and restriction relation), cae analysis parameter (elastic modulus E, Poisson's ratio μ, density of material ρ, size of mesh opening size, stretching or compression stress F are inputtedN, shearing force FS) and engineering constraints (σ≤[σ], τ≤[τ]), according to input parameter, Excel list data and APDL command stream are read out, revise and update, and then threedimensional model is carried out Variant Design, Variant Design step includes as follows:
1) labor list multidiameter parameter, starts Solidworks；
2) according to the association between single-order ladder axis in axis footpath and axial length, it is determined that the restriction relation between the diameter of axle and axial length, and set up restriction relation formula L=2D, Solidworks sets up the parametrization threedimensional model of single multidiameter；
3) set up Variant Design module, utilize the Variant Design module set up to extract single-order ladder axis in axis footpath, axial length parameters and constraint relational expression L=2D rapidly；
4) diameter of axle and axial length parameters and constraint relational expression L=2D are revised, single multidiameter modification；
5) model after modification and data file are preserved.
(5) in the parametric and variant design user interface of axle, backstage starts ANSYS, automatically read the data in the Excel form after updating and APDL command stream and perform APDL command stream file, set up parametrization cae analysis model, carry out parametrization CAE static analysis, export result such as Fig. 5, wherein, cae analysis step includes as follows:
1) backstage starts finite element analysis software ANSYS；
2) according to demand, automatic is that variable element carries out parametrization by the geometric parameters such as the single diameter of axle of multidiameter, axial length in APDL command stream file and springform, Poisson's ratio, density of material, size of mesh opening size, stretching or the cae analysis parameter extraction such as compression stress, shearing force, sets up FEM (finite element) model；
3) input material type is the attribute of No. 45 firm single multidiameters, as follows:
Elastic modelling quantity: E=2e11 (N/m2), Poisson's ratio: μ=0.269, density: ρ=7850 (kg/m3)；
If size of mesh opening size: 2mm, carry out stress and strain model；
Designer can input different parameter values according to various different materials.
4) edge-restraint condition and load are applied: assume one end staff cultivation of single multidiameter tension stretch FN=1KN, shearing force FS=0.5KN；
5) carrying out solving static analysis, result is analyzed in output, exits ANSYS.
Wherein, as revised parameter in Excel, APDL command stream file can be regenerated, and ANSYS reads the data in amended Excel form automatically and APDL command stream is modeled and analyzes；
(6) according to cae analysis result, it may be judged whether meet Engineering constraint (σ≤[σ], τ≤[τ]).If being unsatisfactory for Engineering constraint, returning step (4) and automatically carrying out parameter modification, circulation step (4), (5), (6) are until meeting engineering constraints, if meeting Engineering constraint to carry out next step；
(7), in result auto-returned CAD software, model modification, Excel table update, output result also preserves data file.
Claims (9)
1. the variant design method meeting engineering constraints, it is characterised in that comprise the following steps:
(1) mechanical system component structural performance is carried out preliminary analysis, go forward side by side line parameter analysis, extraction；The Solidworks of CAD software sets up the parametrization threedimensional model of part；
(2) being developing instrument based on VC++, Solidworks is carried out secondary development, constructs parametric and variant design user interface, the performed step at described interface includes the input of geometric model parameter；CAE model parameter inputs；Backstage starts ANSYS, reads Excel list data and performs the APDL command stream that step (3) is write；
(3) model parameter is imported in Excel, and in Excel, write APDL command stream；Wherein, in the user interface during amendment parameter, in Excel, data are automatically revised, are updated；When revising parameter in Excel, SolidWorks also can automatically read Excel data and carry out model modification；
(4) in parametric and variant design user interface, geometric parameter and cae analysis parameter are inputted, Excel list data and APDL command stream are read out, revise and update according to input parameter by engineering software SolidWorks, and then threedimensional model is carried out Variant Design；
(5) in parametric and variant design user interface, backstage starts ANSYS, automatically read the data in the Excel form after updating and APDL command stream and perform APDL command stream file, setting up parametrization cae analysis model, carry out parametrization cae analysis and export result；
(6) according to cae analysis result, it may be judged whether meet Engineering constraint；If being unsatisfactory for Engineering constraint, returning step (4) and automatically carrying out parameter modification, circulation step (4), (5), (6) are until meeting engineering constraints, if meeting Engineering constraint to carry out next step；
(7), in result auto-returned CAD software, model modification, Excel table update, output result also preserves data file.
2. the variant design method meeting engineering constraints according to claim 1, it is characterized in that, parameter described in step (1) includes the variable element of part, derived parameter and invariant parameter, is also classified into geometric parameter, physical parameter, mechanics parameter and cae analysis parameter.
3. the variant design method meeting engineering constraints according to claim 1, it is characterized in that, SolidWorks described in step (3) reads Excel data and carries out model modification, input parameter specifically by Excel, utilize Excel form ActiveX control and realize the amendment of SolidWorks moulded dimension in conjunction with SolidWorks macroefficiency and update；It is .xls form that Excel2003 preserves form.
4. the variant design method meeting engineering constraints according to claim 1, it is characterized in that, described APDL command stream file includes finite element modeling, cell type, material properties, stress and strain model, constrained, applying boundary condition and load, is analyzed, and derives neutral file.
5. the variant design method meeting engineering constraints according to claim 3, it is characterised in that described APDL macro document is .mac file.
6. the variant design method meeting engineering constraints according to claim 1, it is characterised in that the Variant Design step in described step (4) includes as follows:
1) labor Parameters of The Parts, starts Solidworks；
2) according to the association between each size of part, it is determined that the restriction relation between each parameter, and set up restriction relation formula between parameter, and then build parametrization threedimensional model；
3) setting up Variant Design module, the Variant Design module that utilization is set up extracts the dimensional parameters in part model and constraint relational expression rapidly；
4) amendment dimensional parameters, restriction relation formula, part modification；
5) preservation model and data file.
7. the variant design method meeting engineering constraints according to claim 1, it is characterised in that set up parametrization cae analysis model described in step (5), is specially ANSYS and Excel list data is read in array, with data modeling in array；
Wherein, MWRITE, ParP, Fname, Ext,--, label, n1, n2, this readable array of order of n3
VWRITE, Par1, Par2, Par3 ..., this readable single numerical value of order of Par19.
8. the variant design method meeting engineering constraints according to claim 1, it is characterised in that the cae analysis step of described step (5) includes as follows:
1) backstage starts finite element analysis software ANSYS；
2) according to demand, the geometric parameter in APDL command stream file and cae analysis parameter are carried out parametrization, sets up FEM (finite element) model；
3) definition unit type, material properties, stress and strain model；
4) applying edge-restraint condition and load, wherein the constraint suffered by part includes that one end is fixed, two ends are fixed, rotates or translation, and load includes cutting force, pulling force or moment of torsion；
5) carrying out solving analysis, result is analyzed in output, exits ANSYS.
9. the variant design method meeting engineering constraints according to claim 1, it is characterized in that, described geometric parameter includes overall dimensions and load position, cae analysis parameter includes size of mesh opening, magnitude of load and material properties, and wherein material properties includes elastic modelling quantity, Poisson's ratio and density of material.
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| CN112270116A (en) * | 2020-09-25 | 2021-01-26 | 珠海格力电器股份有限公司 | Product packaging and transporting statics analysis method, platform, storage medium and application |
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Application publication date: 20160629 |