CN105426611A - Cycloidal gear parametric analysis method based on ANSYS - Google Patents
Cycloidal gear parametric analysis method based on ANSYS Download PDFInfo
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Abstract
The invention discloses a cycloidal gear parametric analysis method based on ANSYS. The method comprises the following steps: step 1, extracting various parameters of a cycloidal gear and a pin gear; step 2, developing a special module for cycloidal gear analysis in the ANSYS; step 3, successively entering a pretreatment module, a parameter input module, a pre-processing module and a solution module, and finishing each work; step 4, if the solution is successful, entering a postprocessing module and checking a calculated result; if the solution is unsuccessful, then returning to step 3, modifying a parameter value and recalculating; step 5, if the calculated result satisfies a design requirement, executing step 6; if the calculated result does not satisfy the design requirement, then returning to step 3, modifying the parameter value and recalculating; and step 6, if the influence of a certain parameter on the overall structure stress needs to be continued to be analyzed, returning to step 3, modifying the parameter value and recalculating; and if recalculating is not required, then analysis is finished.
Description
Technical field
The invention belongs to cycloid pinwheel planetary gear transmission system design analysis technical field, particularly relate to a kind of Cycloidal Wheel Parametric Analysis method based on ANSYS.
Background technology
According to mechanical design handbook (the 5th edition) the 2nd volume, 9th section, the 3rd chapter: Cycloidal Wheel Gear Planet Transmission force analysis is relevant to be discussed, and Cycloidal Wheel is the core component in cycloid pinwheel planetary gear transmission system, its stressing conditions is comparatively complicated, must carry out the calculating of mechanics associated verification.The core of mechanical analysis carries out necessary stress, strain and deformation analysis to Cycloidal Wheel, then judges that whether Cycloidal Wheel structure is reasonable according to relevant result of calculation, and be optimized improvement to Cycloidal Wheel structure.Traditional Cycloidal Wheel is designed with two kinds of methods: one, technician is according to mechanics relative theory, Cycloidal Wheel and pin tooth Contact Stress of Gear correlation formula is adopted to carry out calculation and check, guarantee that Cycloidal Wheel and pin tooth can normal safe work in engagement process, the method can only analyze the contact stress of the flank of tooth, on the impact of its intensity, suitable formula is not had for factors such as the size in hole in Cycloidal Wheel and the position distribution in hole and carries out computational analysis, the method requires higher to the mechanical knowledge of technician simultaneously, the repetitive operation of staff is needed when the size of Cycloidal Wheel and load change, inefficiency, its two, adopt experimental technique, the method has unrivaled advantage in precision, but its shortcoming is also give prominence to very much, costly, complicated operation, waste time and energy, generally before design typification comes into operation, carry out last strength modification by the method, be unsuitable for using in the design process.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of Cycloidal Wheel Parametric Analysis method based on ANSYS; The method has the advantages that to save the high and good reliability of analysis cost, efficiency.
The technical scheme that the present invention takes for the technical matters existed in solution known technology is:
Based on a Cycloidal Wheel Parametric Analysis method of ANSYS, comprise the steps:
Step one, extraction basic parameter: the parameters of comprehensive analyzing influence Cycloidal Wheel and the work of pin tooth, carry out integration classification, category extracts Cycloidal Wheel geometric parameter, pin tooth geometric parameter, Cycloidal Wheel and pin tooth work-in parameters, Cycloidal Wheel and pin teeth material characterisitic parameter, load parameter and model parameter, and is worked out according to form by above-mentioned parameter;
Step 2, in ANSYS, develop Cycloidal Wheel analyze special module: application ANSYS script APDL writes the parametric program that can realize Cycloidal Wheel mechanical analysis, generate macro document, exploitation Cycloidal Wheel analyzes special module, and this module comprises pre-service, parameters input, pre-treatment, solves and aftertreatment five parts.
2.1 pre-service
Utilization/CWD order assigned work catalogue, under making all files generated in subsequent analysis all be placed on this working directory; Use * ASK order for twice, respectively the mutual input of Realization analysis filename and analysis title name, the preservation of different Study document after facilitating parameter change.Use * CREATE ... * END command, generates pre-service macro document, mentioned order string routine is write this macro document.
2.2 parameters input
Repeatedly use multipro, ' start', multipro, ' end' order, realize the mutual input of Cycloidal Wheel geometric parameter, pin tooth geometric parameter, Cycloidal Wheel and pin tooth assembly parameter, Cycloidal Wheel and pin teeth material characterisitic parameter, load parameter and model parameter respectively.Repeatedly use * CREATE, * END command, generate the input of Cycloidal Wheel geometric parameter, the input of pin tooth geometric parameter, Cycloidal Wheel and pin tooth assembly parameter, Cycloidal Wheel and pin teeth material characterisitic parameter, load parameter and model parameter six independently macro document, respectively command stream program is write the macro document of these correspondences.
2.3 pre-treatment
Set up Parametric geometric model:
Geometric Modeling process adopts bottom-up form, detailed process is: 1) adopt * DO loop command according to cycloid equation, generate the several discrete points on cycloid, then SPLINE order is used to fit to a complete cycloid, 2) global coordinate system is adjusted to cylindrical coordinate, COPY order is adopted to generate complete Cycloidal Wheel profile, 3) use AL order that Cycloidal Wheel profile is generated a face, 4) distribution hole in CYL4 order generation Cycloidal Wheel is repeatedly used, 4) ASBA and VOFFST order is used to generate Cycloidal Wheel three-dimensional model, 5) under cylindrical coordinate, adopt CYL4 and COPY order to generate the pin flank of tooth, 6) the 5th is chosen) the pin flank of tooth that generates in step uses VOFFST order stretched pin tooth three-dimensional model.All dimensional datas of geometric model all achieve parametrization, as long as revise corresponding parameter in parameter mutual input dialogue frame, corresponding change will occur geometric model, and convenient various geometric of analyzing is on integrally-built impact.Use * CREATE ... * END command, generates Geometric Modeling macro document, the command stream program of Geometric Modeling is write this macro document.
Stress and strain model:
Stress and strain model detailed process is: 1) repeatedly use MP order to be respectively Cycloidal Wheel and pin tooth appointment elastic modulus and Poisson ratio material characteristic, 2) by ET order designating unit type, 3) by ESIZE order designating unit size, 4) with VSWEEP order, geometric model is divided into hexahedral mesh model.Use * CREATE ... * END command, generating mesh divides macro document, and the command stream program of stress and strain model is write this macro document.
Position constraint:
Position constraint comprises pin tooth position constraint and Cycloidal Wheel position constraint, setting up procedure is as follows: 1) global coordinate system is adjusted to cylindrical coordinate, according to position relationship, the node belonging to pin tooth is all elected, D order is used the degree of freedom of UX, UY, UZ, VELX and VELY all to be retrained, 2) all nodes belonged on Cycloidal Wheel center pit face are all elected, use D order the degree of freedom of UX, UY, UZ, VELX and VELY all to be retrained.Use * CREATE ... * END command, generates position constraint macro document, the command stream program of position constraint is write this macro document.
Contact is arranged:
Pin tooth participates in the face of contact as target face, face Cycloidal Wheel participating in contact is as surface of contact, detailed process is as follows: 1) first use MP order setting coefficient of contact friction, R order setting contact gap and normal contact stiffness, 2) global coordinate system is adjusted to cylindrical coordinate, VSEL order is used to be elected by the pin tooth 3D solid participating in contact according to position relationship, 3) ASLV order is used to belong to 1) outside surface of pin tooth 3D solid is elected in step, continue to use ASLV order to be elected on the surface that pin tooth participates in engagement according to position relationship, 4) NSLA order is used all to elect as target face contact node using all nodes on pin tooth mating surface, 5) in like manner according to 2)-4) thinking select the node that Cycloidal Wheel participates in contact as the contact point of surface of contact, complete contact to arrange.It is TARGE170 that this contact arranges middle object element, and osculating element is CONTA174.Use * CREATE ... * END command, generates contact and arranges macro document, the command stream program that contact is arranged is write this macro document.
Imposed load:
Load applying position is on the circular hole of the left and right sides, concrete applying process is as follows: 1) first close according to coordinate and tie up to center, left circles hole establishment key point, key point creates No. 11 local cylindrical coordinates, and current coordinate system is appointed as this local coordinate system, 2) ASEL order is used to select Left-side center hole surface according to coordinate relation, with NSLA, all nodes belonged on surface are chosen, selected nodal coordinate system is all changed into No. 11 local cylindrical coordinates with NROTAT order, 3) F order is used to apply FY item load to selected node, namely torque Cycloidal Wheel left hole is subject to, 4) in like manner according to 1)-3) thinking create No. 12 local cylindrical coordinates, for right side circular hole applies torque, load applying completes.Use * CREATE ... * END command, generates load applying macro document, the command stream program of imposed load is write this macro document.
2.4 solve
Utilization/SOLU order enters and solves module, ANTYPE order designated analysis type is statics Analysis, it is 1 that TIME order appointment solves T.T., it is 100 that NSUBST order appointment solves step, EQSLV specifies solver to be PCG, SOLVE order solves, and has solved rear FINISH and has exited and solve module.Use * CREATE ... * END command, generates and solves macro document, the command stream program solving calculating is write this macro document.
2.5 aftertreatment
Use PLNSOL, S, EQV ... display equivalent stress; PLNSOL, EPTO, EQV ... display equivalent strain, PLNSOL, U, SUM ... display distortion; PLNSOL, CONT, PRES ... display contact stress; PLVECT, U ... display displacement vector; PLVECT, S ... display stress vector.Repeatedly use * CREATE, * END command, generate display equivalent stress, display equivalent strain, display distortion, display contact stress, display displacement vector and display stress vector six independently macro document, respectively above-mentioned command stream program is written in corresponding macro document.
2.6 exploitation specific purpose tool bars:
1) create first .ABBR file, use for twice * ABBR order create pre-service and solve toolbar button, enable button call macro document corresponding to backstage respectively; Repeatedly use * ABB order to create parameters input, pre-treatment button nested with aftertreatment one-level, the sub-tool bar of secondary can be entered.
2) second .ABBR file is created, repeatedly use that * ABBR order creates Cycloidal Wheel parameters input, pin tooth geometric parameter inputs, Cycloidal Wheel and pin tooth assembly parameter inputs, material characteristic parameter inputs, load parameter inputs, model parameter inputs and return one-level tool bar seven secondary toolbar buttons, this secondary tool bar belongs to the sub-tool bar of parameters input, enables the first six button call macro document corresponding to backstage respectively; Use * ABB, RETURN, ABBRES, XXX, ABBR order realizes the sub-tool bar of from then on secondary and turns back to one-level tool bar, and wherein XXX is the filename of first .ABBR file.
3) the 3rd .ABBR file is created, * ABBR order is repeatedly used to create Geometric Modeling, stress and strain model, contact setting, displacement constraint, imposed load and return one-level tool bar six secondary toolbar buttons, this secondary tool bar belongs to the sub-tool bar of parameters input, enables first five items button call macro document corresponding to backstage respectively; Use * ABB, RETURN, ABBRES, XXX, ABBR order realizes the sub-tool bar of from then on secondary and turns back to one-level tool bar, and wherein XXX is the filename of first .ABBR file.
3) the 3rd .ABBR file is created, * ABBR order is repeatedly used to create display equivalent stress, display equivalent strain, display distortion, show contact condition, show displacement vector, show stress vector and return one-level tool bar seven secondary toolbar buttons, this secondary tool bar belongs to the sub-tool bar of aftertreatment, enables the first six button call macro document corresponding to backstage respectively; Use * ABB, RETURN, ABBRES, XXX, ABBR order can realize the from then on sub-tool bar of secondary and turn back to one-level tool bar, and wherein XXX is the filename of first .ABBR file.
4) under all macro documents being placed on same catalogue, open startXX (XX the is software version number) file under ANSYS installation directory, the deposit position of macro document is specified in utilization/PSEARCH order, copies all the elements in first .ABBR file and preserves in this document.
, there is Cycloidal Wheel mechanical analysis specific purpose tool bar module in normal startup ANSYS software, complete Cycloidal Wheel and analyze special module development below Toolbar.
Step 3, enter pretreatment module, assigned work path, mutual import file name and title name; Enter parameter input module and input basic parameter value alternately; Enter pre-processing module, automatically complete Geometric Modeling, stress and strain model and the work such as applying displacement and load; Enter and solve module and automatically complete calculating.
If step 4 solves successfully, enter post-processing module and check the result of calculations such as stress, strain and distortion; If solve unsuccessful, return the 3rd step, amendment related parameter values, carry out recalculating until success.
Whether step 5, analysis result meet design requirement, if met design requirement, perform the 6th step; If result of calculation does not meet design requirement, return the 3rd step, amendment related parameter values, carries out recalculating until meet design requirement.
If step 6 needs to continue to analyze certain parameter to the stressed impact of one-piece construction, return the 3rd step, amendment parameter value recalculates, until all Parameter analysis complete, analyzes and terminates; If just do check analysis to certain existing structure, do not need to continue to analyze certain parameter to integrally-built stressing influence, then analyze end.
The advantage that the present invention has and good effect are:
The present invention compared with prior art, improves cycloidal-pin wheel mechanical analyzing method, substantially reduces design time, decrease design cost compared with traditional analytical approach.The cycloidal-pin wheel mechanical analysis special module of application ANSYS script APDL exploitation, repeatedly various sizes can be analyzed, different materials, the multiple design proposal of different loads or the stressing conditions of design conditions by simply revising parameter, greatly improve analysis efficiency, decrease analysis cost.
Accompanying drawing illustrates:
Fig. 1 is the process flow diagram of the preferred embodiment of the present invention;
Fig. 2 is that preferred embodiment of the present invention Cycloidal Wheel analyzes special module general frame
Fig. 3 is Cycloidal Wheel and pin tooth geometric parameter schematic symbol diagram
Fig. 4 a is the one-level tool bar of the preferred embodiment of the present invention;
Fig. 4 b is the sub-tool bar of 02-PARAMETERS subordinate's secondary;
Fig. 4 c is the sub-tool bar of 03-PRE-PROCESSOR subordinate's secondary;
Fig. 4 d is the sub-tool bar of 05-PLOT-RESULT subordinate's secondary;
Fig. 5 a is the mutual input dialogue frame of Study document name;
Fig. 5 b is for analyzing the mutual input dialogue frame of title name;
Fig. 6 a is Cycloidal Wheel geometric parameter input interactive dialogue frame;
Fig. 6 b is pin tooth geometric parameter input interactive dialogue frame;
Fig. 6 c is that Cycloidal Wheel and pin teeth material characteristic input interactive dialogue frame;
Fig. 6 d is that Cycloidal Wheel and pin tooth assembly parameter input interactive dialogue frame;
Fig. 6 e is load character parameters input interactive dialogue frame;
Fig. 6 f is model parameter input interactive dialogue frame;
Fig. 7 a is the geometric model of Cycloidal Wheel and the engagement of pin tooth;
Fig. 7 b is hexahedral mesh model;
Fig. 7 c is finite element model;
Fig. 8 a is equivalent stress figure;
Fig. 8 b is equivalent strain figure deformation pattern;
Fig. 8 c is deformation pattern;
Fig. 8 d is contact stress figure;
Fig. 8 e is stress vector figure;
Fig. 8 f is displacement vector figure.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
For overcoming the defect of conventional art, the technology used in the present invention solution is: a kind of Cycloidal Wheel Parametric Analysis method based on ANSYS, and overall flow as shown in Figure 1, first extracts the parameters affecting Cycloidal Wheel and the work of pin tooth; Application APDL scripting language can realize the parametric program of Cycloidal Wheel mechanical analysis, generate macro document, in ANSYS software, develop Cycloidal Wheel analyze special module, this module comprises pre-service, parameters input, pre-treatment, solves and aftertreatment five parts, and general frame as shown in Figure 2; In the automatic assigned work path of pretreatment module, mutual import file name and title name; In parameter input module, be Cycloidal Wheel and pin tooth basic parameter assignment by the interactive interface after exploitation; Automatically the pre-treatment work such as Geometric Modeling, stress and strain model, constraint and load applying are completed at pre-processing module; Solving module, automatically completing solving calculating; Solve successfully, in post-processing module, check the result of calculations such as corresponding stress, strain and distortion; Whether meet design requirement according to result of calculation analytical structure, whether revise parameter and recalculate, to the last terminate, concrete steps are as follows:
1, basic parameter is extracted:
The parameters of comprehensive analyzing influence Cycloidal Wheel and the work of pin tooth, carry out integration classification, category works out following form 1-6, the symbol one_to_one corresponding wherein in geometric parameter in parameters symbol and Fig. 3.
Table 1 Cycloidal Wheel geometric parameter
Table 2 pin tooth geometric parameter
Table 3 Cycloidal Wheel and pin tooth assembly parameter
Table 4 Cycloidal Wheel and pin teeth material characterisitic parameter
Table 5 load character parameter
Table 6 model parameter
2, in ANSYS, develop Cycloidal Wheel analyze special module
Application ANSYS script APDL writes the parametric program that can realize Cycloidal Wheel mechanical analysis, and generate macro document, exploitation Cycloidal Wheel analyzes special module, and this module comprises pre-service, parameters input, pre-treatment, solves and aftertreatment five parts.
2.1 pre-service
Utilization/CWD order assigned work catalogue, under making all files generated in subsequent analysis all be placed on this working directory; Use * ASK order for twice, respectively the mutual input of Realization analysis filename and analysis title name, the preservation of different Study document after facilitating parameter change.Use * CREATE ... * END command, generates A01_PRE_WORK.MAC macro document, mentioned order string routine is write this macro document.
2.2 parameters input
Repeatedly use multipro, ' start', multipro, ' end' order, realize the mutual input of Cycloidal Wheel geometric parameter, pin tooth geometric parameter, Cycloidal Wheel and pin tooth assembly parameter, Cycloidal Wheel and pin teeth material characterisitic parameter, load character parameter and model parameter respectively.Repeatedly use * CREATE, * END command, generate B02_CYCLOID_GEA.MAC, B02_NEEDLE_TEETH.MAC, B02_MESHING.MAC, B02_MATERAIL.MAC, B02_LOADING.MAC and B02_MODLE.MAC six independently macro document, respectively command stream program is write in the macro document of these correspondences.
2.3 pre-treatment
Set up Parametric geometric model:
Geometric Modeling process adopts bottom-up form, detailed process is: 1) adopt * DO loop command according to cycloid equation, generate the several discrete points on cycloid, then SPLINE order is used to fit to a complete cycloid, 2) global coordinate system is adjusted to cylindrical coordinate, COPY order is adopted to generate complete Cycloidal Wheel profile, 3) use AL order that Cycloidal Wheel profile is generated a face, 4) distribution hole in CYL4 order generation Cycloidal Wheel is repeatedly used, 4) ASBA and VOFFST order is used to generate Cycloidal Wheel three-dimensional model, 5) under cylindrical coordinate, adopt CYL4 and COPY order to generate the pin flank of tooth, 6) the 5th is chosen) the pin flank of tooth that generates in step uses VOFFST order stretched pin tooth three-dimensional model.All dimensional datas of geometric model all achieve parametrization, as long as revise corresponding parameter in parameter mutual input dialogue frame, corresponding change will occur geometric model, and convenient various geometric of analyzing is on integrally-built impact.Use * CREATE ... * END command, generates B03_MODLE_MX.MAC macro document, the command stream program of Geometric Modeling is write this macro document.
Stress and strain model:
Stress and strain model detailed process is: 1) repeatedly use MP order to be respectively Cycloidal Wheel and pin tooth appointment elastic modulus and Poisson ratio material characteristic, 2) by ET order designating unit type, 3) by ESIZE order designating unit size, 4) with VSWEEP order, geometric model is divided into hexahedral mesh model.Use * CREATE ... * END command, generates B03_MESH_MX.MAC macro document, the command stream program of stress and strain model is write this macro document.
Position constraint:
Position constraint comprises pin tooth position constraint and Cycloidal Wheel position constraint, setting up procedure is as follows: 1) global coordinate system is adjusted to cylindrical coordinate, according to position relationship, the node belonging to pin tooth is all elected, D order is used the degree of freedom of UX, UY, UZ, VELX and VELY all to be retrained, 2) all nodes belonged on Cycloidal Wheel center pit face are all elected, use D order the degree of freedom of UX, UY, UZ, VELX and VELY all to be retrained.Use * CREATE ... * END command, generates B03_DISPLACE.MAC macro document, the command stream program of position constraint is write this macro document.
Contact is arranged:
Pin tooth participates in the face of contact as target face, face Cycloidal Wheel participating in contact is as surface of contact, detailed process is as follows: 1) first use MP order setting coefficient of contact friction, R order setting contact gap and normal contact stiffness, 2) global coordinate system is adjusted to cylindrical coordinate, VSEL order is used to be elected by the pin tooth 3D solid participating in contact according to position relationship, 3) ASLV order is used to belong to 1) outside surface of pin tooth 3D solid is elected in step, continue to use ASLV order to be elected on the surface that pin tooth participates in engagement according to position relationship, 4) NSLA order is used all to elect as target face contact node using all nodes on pin tooth mating surface, 5) in like manner according to 2)-4) thinking select the node that Cycloidal Wheel participates in contact as the contact point of surface of contact, complete contact to arrange.It is TARGE170 that this contact arranges middle object element, and osculating element is CONTA174.Use * CREATE ... * END command, generates B03_CONTACT.MAC, and the command stream program that contact is arranged is write this macro document.
Imposed load:
Load applying position is on the circular hole of the left and right sides, concrete applying process is as follows: 1) first close according to coordinate and tie up to center, left circles hole establishment key point, key point creates No. 11 local cylindrical coordinates, and current coordinate system is appointed as this local coordinate system, 2) ASEL order is used to select Left-side center hole surface according to coordinate relation, with NSLA, all nodes belonged on surface are chosen, selected nodal coordinate system is all changed into No. 11 local cylindrical coordinates with NROTAT order, 3) F order is used to apply FY item load to selected node, namely torque Cycloidal Wheel left hole is subject to, 4) in like manner according to 1)-3) thinking create No. 12 local cylindrical coordinates, for right side circular hole applies torque, load applying completes.Use * CREATE ... * END command, generates B03_LOADING.MAC macro document, the command stream program of imposed load is write this macro document.
2.4 solve clearing
Utilization/SOLU order enters and solves module, ANTYPE order designated analysis type is statics Analysis, it is 1 that TIME order appointment solves T.T., it is 100 that NSUBST order appointment solves step, EQSLV specifies solver to be PCG, SOLVE order solves, and has solved rear FINISH and has exited and solve module.Use * CREATE ... * END command, generates A04_SOLVE.MAC file, the command stream program solving calculating is write this macro document.
2.5 aftertreatment
Use PLNSOL, S, EQV ... display equivalent stress; PLNSOL, EPTO, EQV ... display equivalent strain, PLNSOL, U, SUM ... display distortion; PLNSOL, CONT, PRES ... display contact stress; PLVECT, U ... display displacement vector; PLVECT, S ... display stress vector.Repeatedly use * CREATE, * END command, generate B05_MISES_STRESS.MAC, B05_MISES_STRAIN.MAC, B05_DISPLACEMENT.MAC, B05_CONTACT_PRESSURE.MAC, B05_VECTOR_DISPLACEMENT.MAC and B05_VECTOR_STRESS.MAC six independently macro document, respectively above-mentioned command stream program is written in corresponding macro document.
2.6 exploitation specific purpose tool bars:
1) newly-built TEMP0.ABBR file, uses for twice * ABBR order to create 01-PRE-WORK and 04-SOLVE toolbar button, enables button call A01_PRE_WORK.MAC and the 04_SOLVE.MAC macro document on backstage respectively; Repeatedly use * ABB order to create 02-PARAMETERS, 03-PRE-PROCESSOR button nested with 05-PLOT-RESULT one-level, the sub-tool bar of secondary can be entered.
2) newly-built TEMP1.ABBR file, * ABBR order is repeatedly used to create 02-1CYCLOID-GEA, 02-2NEEDLE-TEETH, 02-3MESHING, 02-4MATERAIL, 02-5LOADING, 02-6MODLE and 02-7RETURN secondary toolbar button, this secondary tool bar belongs to the sub-tool bar of 02-PARAMETERS, enables the first six button call 02_CYCLOID_GEA.MAC, 02_NEEDLE_TEETH.MAC, 02_MESHING.MAC, 02_MATERAIL.MAC, 02_LOADING.MAC and 02_MODLE.MAC macro document respectively; Use * ABB, RETURN, ABBRES, TEMP0, ABBR order realizes the sub-tool bar 02-7RETURN of from then on secondary and turns back to one-level tool bar.
3) newly-built TEMP2.ABBR file, * ABBR order is repeatedly used to create 03-1MODLE-MX, 03-2MESH-MX, 03-3CONTACT, 03-4DISPLACE, 03-5LOADING and 03-6RETURN secondary toolbar button, this secondary tool bar belongs to the sub-tool bar of 03-PRE-PROCESSOR, enables first five items button call 03-MODLE-MX.MAC, 03-MESH-MX.MAC, 03-CONTACT.MAC, 03-DISPLACE.MAC and 03-LOADING.MAC macro document respectively; Use * ABB, RETURN, ABBRES, TEMP0, ABBR order realizes the sub-tool bar 03-6RETURN of from then on secondary and turns back to one-level tool bar.
4) newly-built TEMP3.ABBR file, repeatedly use * ABBR command definition 05-1MISES-STRESS, 05-2MISES-STRAIN, 05-3DISPLACEMENT, 05-4CONTACT-PRESSURE, 05-5VECTOR-DISPLACEMENT, 05-6VECTOR-STRESS and 05-7RETURN secondary toolbar button, this secondary tool bar belongs to the sub-tool bar of one-level toolbar button 05-PLOT-RESULT, the first six button is enable to call 05_1MISES_STRESS.MAC respectively, 05_2MISES_STRAIN.MAC, 05_3DISPLACEMENT.MAC, 05_4CONTACT_PRESSURE.MAC, 05_5VECTOR_DISPLACEMENT.MAC and 05_6VECTOR_STRESS.MAC, macro document, use * ABB, RETURN, ABBRES, TEMP0, ABBR order can realize the sub-tool bar 05-7RETURN of from then on secondary and turn back to one-level tool bar.
5) under all macro documents being placed on same catalogue, open startXX (XX the is software version number) file under ANSYS installation directory, the deposit position of macro document is specified in utilization/PSEARCH order, copies all the elements in TEMP0.ABBR file and preserves in this document.
, there is one-level tool bar as shown in fig. 4 a, the tool bar of secondary shown in 4b, 4c and 4d in normal startup ANSYS software, complete Cycloidal Wheel and analyze special module development below Toolbar.
3, pretreatment work is completed:
For the Cycloidal Wheel analysis of a certain model, enter pretreatment module, automatic assigned work path, occur interactive interface as shown in figure 5a and 5b, the name of complete components file name and title name.
4, parameters input work is completed:
Enter parameter input module, occur as the mutual inputting interface of Fig. 6 a, 6b, 6c, 6d, 6e and 6f parameter, complete the assignment of parameters.
5, pre-treatment work is completed:
Enter pre-processing module, automatically complete Geometric Modeling, stress and strain model, contact setting, displacement constraint and load applying, as shown in Figure 7a, as shown in Figure 7b, finite element grid model as shown in Figure 7 c for hexahedral mesh model for its geometric model.
6, the work of solving is completed:
Enter and solve module, automatically complete solving.
7, aftertreatment work:
Solve successfully, enter post-processing module, check every result of calculation, wherein equivalent stress as shown in Figure 8 a, and as shown in Figure 8 b, as shown in Figure 8 c, as shown in figure 8d, as figure 8 e shows, stress vector as illustrated in fig. 8f for displacement vector for contact stress in distortion for equivalent strain.Analyze result of calculation, meet design requirement, this is analyzed only as structure verification, does not need to continue to analyze certain Parameters variation to the stressed impact of one-piece construction, analyzes and terminates.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (7)
1., based on a Cycloidal Wheel Parametric Analysis method of ANSYS, it is characterized in that: comprise the steps:
Step one, extraction basic parameter: the parameters of comprehensive analyzing influence Cycloidal Wheel and the work of pin tooth, carry out integration classification, category extracts Cycloidal Wheel geometric parameter, pin tooth geometric parameter, Cycloidal Wheel and pin tooth work-in parameters, Cycloidal Wheel and pin teeth material characterisitic parameter, load character parameter and model parameter, and is worked out according to form by above-mentioned parameter;
Step 2, in ANSYS, develop Cycloidal Wheel analyze special module: application ANSYS script APDL writes the parametric program that can realize Cycloidal Wheel mechanical analysis, generate macro document, exploitation Cycloidal Wheel analyzes special module, and this module comprises pre-service, parameters input, pre-treatment, solves and aftertreatment five parts;
Step 3, enter pretreatment module, assigned work path, mutual import file name and title name; Enter parameter input module and input basic parameter value alternately; Enter pre-processing module, automatically complete Geometric Modeling, stress and strain model, applying displacement constraint, imposed load and work such as contacting is set; Enter and solve module and automatically complete and solve calculating;
If step 4 solves successfully, enter post-processing module and check the result of calculations such as stress, strain and distortion; If solve unsuccessful, return the 3rd step, amendment related parameter values, carry out recalculating until success;
Whether step 5, analysis result meet design requirement, if met design requirement, perform the 6th step; If result of calculation does not meet design requirement, return the 3rd step, amendment related parameter values, carries out recalculating until meet design requirement;
If step 6 needs to continue to analyze certain parameter to the stressed impact of one-piece construction, return the 3rd step, amendment parameter value recalculates, until all Parameter analysis complete, analyzes and terminates; If just do check analysis to certain existing structure, do not need to continue to analyze certain parameter to integrally-built stressing influence, then analyze end.
2., according to claim 1 based on the Cycloidal Wheel Parametric Analysis method of ANSYS, it is characterized in that: the pre-service described in step 2:
Utilization/CWD order assigned work catalogue, under making all files generated in subsequent analysis all be placed on this working directory; Use * ASK order for twice, respectively the mutual input of Realization analysis filename and analysis title name, the preservation of different Study document after facilitating parameter change; Use * CREATE ... * END command, generates pre-service macro document, mentioned order string routine is write this macro document.
3., according to claim 1 based on the Cycloidal Wheel Parametric Analysis method of ANSYS, it is characterized in that: the parameters input described in step 2:
Repeatedly use multipro, ' start', multipro, ' end' order, realize the mutual input of Cycloidal Wheel geometric parameter, pin tooth geometric parameter, Cycloidal Wheel and pin tooth work-in parameters, Cycloidal Wheel and pin teeth material characterisitic parameter, load parameter and model parameter respectively; Repeatedly use * CREATE, * END command, generate the input of Cycloidal Wheel geometric parameter, the input of pin tooth geometric parameter, Cycloidal Wheel and pin tooth work-in parameters, Cycloidal Wheel and pin teeth material characterisitic parameter, load parameter and model parameter six independently macro document, respectively command stream program is write the macro document of these correspondences.
4., according to claim 1 based on the Cycloidal Wheel Parametric Analysis method of ANSYS, it is characterized in that: the pre-treatment described in step 2:
Set up Parametric geometric model:
Geometric Modeling process adopts bottom-up form, detailed process is: 1) adopt * DO loop command according to cycloid equation, generate the several discrete points on cycloid, then SPLINE order is used to fit to a complete cycloid, 2) global coordinate system is adjusted to cylindrical coordinate, COPY order is adopted to generate complete Cycloidal Wheel profile, 3) use AL order that Cycloidal Wheel profile is generated a face, 4) distribution hole in CYL4 order generation Cycloidal Wheel is repeatedly used, 4) ASBA and VOFFST order is used to generate Cycloidal Wheel three-dimensional model, 5) under cylindrical coordinate, adopt CYL4 and COPY order to generate the pin flank of tooth, 6) the 5th is chosen) the pin flank of tooth that generates in step uses VOFFST order stretched pin tooth three-dimensional model, all dimensional datas of geometric model all achieve parametrization, as long as revise corresponding parameter in parameter mutual input dialogue frame, corresponding change will occur geometric model, and convenient various geometric of analyzing is on integrally-built impact, use * CREATE ... * END command, generates Geometric Modeling macro document, the command stream program of Geometric Modeling is write this macro document,
Stress and strain model:
Stress and strain model detailed process is: 1) repeatedly use MP order to be respectively Cycloidal Wheel and material behavior such as the appointment of pin tooth elastic modulus and Poisson ratio etc., 2) by ET order designating unit type, 3) by ESIZE order designating unit size, 4) with VSWEEP order, geometric model is divided into hexahedral mesh model; Use * CREATE ... * END command, generating mesh divides macro document, and the command stream program of stress and strain model is write this macro document;
Position constraint:
Position constraint comprises pin tooth position constraint and Cycloidal Wheel position constraint, setting up procedure is as follows: 1) global coordinate system is adjusted to cylindrical coordinate, according to position relationship, the node belonging to pin tooth is all elected, D order is used the degree of freedom of UX, UY, UZ, VELX and VELY all to be retrained, 2) all nodes belonged on Cycloidal Wheel center pit face are all elected, use D order the degree of freedom of UX, UY, UZ, VELX and VELY all to be retrained; Use * CREATE ... * END command, generates position constraint macro document, the command stream program of position constraint is write this macro document;
Contact is arranged:
Pin tooth participates in the face of contact as target face, face Cycloidal Wheel participating in contact is as surface of contact, detailed process is as follows: 1) first use MP order setting coefficient of contact friction, R order setting contact gap and normal contact stiffness, 2) global coordinate system is adjusted to cylindrical coordinate, VSEL order is used to be elected by the pin tooth 3D solid participating in contact according to position relationship, 3) ASLV order is used to belong to 1) outside surface of pin tooth 3D solid is elected in step, continue to use ASLV order to be elected on the surface that pin tooth participates in engagement according to position relationship, 4) NSLA order is used all to elect as target face contact node using all nodes on pin tooth mating surface, 5) in like manner according to 2)-4) thinking select the node that Cycloidal Wheel participates in contact as the contact point of surface of contact, complete contact to arrange, it is TARGE170 that this contact arranges middle object element, and osculating element is CONTA174, use * CREATE ... * END command, generates contact and arranges macro document, the command stream program that contact is arranged is write this macro document,
Imposed load:
Load applying position is on the circular hole of the left and right sides, concrete applying process is as follows: 1) first close according to coordinate and tie up to center, left circles hole establishment key point, key point creates No. 11 local cylindrical coordinates, and current coordinate system is appointed as this local coordinate system, 2) ASEL order is used to select Left-side center hole surface according to coordinate relation, with NSLA, all nodes belonged on surface are chosen, selected nodal coordinate system is all changed into No. 11 local cylindrical coordinates with NROTAT order, 3) F order is used to apply FY item load to selected node, namely torque Cycloidal Wheel left hole is subject to, 4) in like manner according to 1)-3) thinking create No. 12 local cylindrical coordinates, for right side circular hole applies torque, load applying completes, use * CREATE ... * END command, generates load applying macro document, the command stream program of imposed load is write this macro document.
5., according to claim 1 based on the Cycloidal Wheel Parametric Analysis method of ANSYS, it is characterized in that: solving described in step 2:
Utilization/SOLU order enters and solves module, ANTYPE order designated analysis type is statics Analysis, it is 1 that TIME order appointment solves T.T., it is 100 that NSUBST order appointment solves step, EQSLV specifies solver to be PCG, SOLVE order solves, and has solved rear FINISH and has exited and solve module; Use * CREATE ... * END command, generates and solves macro document, the command stream program solving calculating is write this macro document.
6., according to claim 1 based on the Cycloidal Wheel Parametric Analysis method of ANSYS, it is characterized in that: the aftertreatment described in step 2:
Use PLNSOL, S, EQV ... display equivalent stress; PLNSOL, EPTO, EQV ... display equivalent strain, PLNSOL, U, SUM ... display distortion; PLNSOL, CONT, PRES ... display contact stress; PLVECT, U ... display displacement vector; PLVECT, S ... display stress vector; Repeatedly use * CREATE, * END command, generate display equivalent stress, display equivalent strain, display distortion, display contact stress, display displacement vector and display stress vector six independently macro document, respectively above-mentioned command stream program is written in corresponding macro document.
7. according to claim 1 based on the Cycloidal Wheel Parametric Analysis method of ANSYS, it is characterized in that: the exploitation Cycloidal Wheel described in step 2 analyzes special module:
1) create first .ABBR file, use for twice * ABBR order create pre-service and solve toolbar button, enable button call macro document corresponding to backstage respectively; Repeatedly use * ABB order to create parameters input, pre-treatment button nested with aftertreatment one-level, the sub-tool bar of secondary can be entered;
2) second .ABBR file is created, repeatedly use that * ABBR order creates Cycloidal Wheel parameters input, pin tooth geometric parameter inputs, Cycloidal Wheel and pin tooth assembly parameter inputs, material characteristic parameter inputs, load parameter inputs, model parameter inputs and return one-level tool bar seven secondary toolbar buttons, this secondary tool bar belongs to the sub-tool bar of parameters input, enables the first six button call macro document corresponding to backstage respectively; Use * ABB, RETURN, ABBRES, XXX, ABBR order realizes the sub-tool bar of from then on secondary and turns back to one-level tool bar, and wherein XXX is the filename of first .ABBR file;
3) the 3rd .ABBR file is created, * ABBR order is repeatedly used to create Geometric Modeling, stress and strain model, contact setting, displacement constraint, imposed load and return one-level tool bar six secondary toolbar buttons, this secondary tool bar belongs to the sub-tool bar of parameters input, enables first five items button call macro document corresponding to backstage respectively; Use * ABB, RETURN, ABBRES, XXX, ABBR order realizes the sub-tool bar of from then on secondary and turns back to one-level tool bar, and wherein XXX is the filename of first .ABBR file;
3) the 3rd .ABBR file is created, * ABBR order is repeatedly used to create display equivalent stress, display equivalent strain, display distortion, show contact condition, show displacement vector, show stress vector and return one-level tool bar seven secondary toolbar buttons, this secondary tool bar belongs to the sub-tool bar of aftertreatment, enables the first six button call macro document corresponding to backstage respectively; Use * ABB, RETURN, ABBRES, XXX, ABBR order can realize the from then on sub-tool bar of secondary and turn back to one-level tool bar, and wherein XXX is the filename of first .ABBR file;
4) under all macro documents being placed on same catalogue, open startXX (XX the is software version number) file under ANSYS installation directory, the deposit position of macro document is specified in utilization/PSEARCH order, copies all the elements in first .ABBR file and preserves in this document;
, there is Cycloidal Wheel mechanical analysis specific purpose tool bar module in normal startup ANSYS software, complete Cycloidal Wheel and analyze special module development below Toolbar.
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