CN104036085B - Thickness statistical method for the complex profile acoustic part of automobile of CAE simulation analysis - Google Patents
Thickness statistical method for the complex profile acoustic part of automobile of CAE simulation analysis Download PDFInfo
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Abstract
The present invention provides a kind of thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis, including step：Start CATIA softwares, open acoustic part of automobile CAD model file；Extract two complex profiles of A, B relevant with thickness measure；Dividing processing is carried out to two complex profiles of A, B in CATIA softwares；With thickness as row value, subregion is numbered train value, sets up a thickness information statistical table；Set the THICKNESS CALCULATION direction of each subregion；The distance statistics for executing single subregion are calculated, and measure the area in subregion face on B faces, and result of calculation is charged in Excel file；The statistical computation of all subregions is completed one by one, and result of calculation is charged in Excel file；Last percentage thickness statistical computation is completed using Excel software computing functions.This method is easy to operate, improves operating efficiency, carries out multidomain treat-ment using the processing method of standard to product, reduces the otherness of different personnel's statisticses.
Description
Technical field
The present invention relates to a kind of statistical calculation method, especially a kind of using Three-dimensional CAD Software mean camber distance detection work
The method that tool express statistic calculates complex profile acoustic part of automobile percentage thickness, belongs to acoustic part of automobile using statistics energy
Amount（SEA）Method carries out the technical field of acoustical behavior CAE simulation analysis.
Background technology
CAE (computer-aided engineering) emulation is being carried out using statistical Energy Analysis Approach to the sound-absorbing of acoustic element, sound insulation value
During analysis, it is required for the percentage thickness of statistical acoustics part to be distributed：From the beginning of 5mm, to the maximum gauge of product, such as 35mm,
Middle with 5mm as interval, calculate the ratio of every kind of thickness corresponding gross area and whole product area in the product respectively.Wherein
The deviation allowed in statistics by each thickness is ± 2.5mm, by taking 10mm as an example, in statistics by thickness in 7.5mm≤t<
Region in the range of 12.5mm is all designated as in the area of 10mm thickness.
Traditional statistical method is：1）, with 100mm × 100mm as a square, subregion is carried out to whole product（Such as Fig. 5）；
2）, count area in each square shared by each thickness of product one by one；3）, area phase same thickness in all regions
Add up；4）, the gross area of each thickness divided by product the gross area.In this process, a 100mm × 100mm is needed first
Square continue to be divided into less square（Such as Fig. 6, Fig. 7）, such as 20mm × 20mm, then again each 20mm of hand dipping ×
The thickness of the product in 20mm squares（Such as Fig. 7）, insert in one and product block plan identical grid figure, last manual statistics
The square number shared by each thickness is calculated, the percent profile situation of each thickness is calculated.Take very much in this way,
The statistics of an automobile front wall sound-isolation pad thickness is completed, the time for spending more than 40h is needed, and different personnel, due to measurement
The difference of gimmick, the result of statistics also occur very big difference, cause when acoustical behavior calculating is carried out in the later stage, result of calculation
Accuracy hardly result in guarantee.
Therefore, the high complex profile acoustic element percentage thickness of a kind of efficiency high, accuracy height, reliability is made
Statistical method, for the acoustical behavior CAE simulation analysis of successful enforcement auto parts and components have very important significance.
Content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of statistics complex profile acoustic element is thick
The method of degree percentage.Which is easy to operate, improves operating efficiency, and wide accommodation, statistics will not vary with each individual, so as to
Ensure that the accuracy of acoustics CAE simulation analysis results.The technical solution used in the present invention is：
A kind of thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis, comprises the steps：
A, startup 3D PaintShop CATIA, open the acoustic element CAD model for needing to carry out percentage thickness statistics
File；
B, referred to as two relative surfaces for extracting the acoustic element related to thickness measure, A, B face；Measurement by thickness
It is converted into the measurement to distance between two surfaces of A, B；
C, multidomain treat-ment is carried out in CATIA softwares to A, B face, the principle of subregion is：Thickness side in single cut zone
Consistent to identical or Curvature varying；And the thickness direction for causing to calculate is identical with actual (real) thickness direction；
D, a Excel file of foundation, go value for thickness value, and train value is the partition number in step c)；
E, the principle in the distance of curved surface statistical tool of CATIA softwares, formulating thickness measure direction：For thickness side
To identical continuum, using thickness direction as self-defined measurement direction, the starting point face in self-defined direction is initial surface, terminal
Face is terminal surface；For the region in face parallel up and down, " normal direction " measurement is used；
F, by CATIA software exchanges to Random Curved Surface Designing modular environment, call the distance of curved surface in software to measure analysis
Instrument；A distance statistics step value is set, then according to c）In subregion and e）Each area measure direction of middle determination is carried out
Progressively statistical analysis；
G, execute distance analysis and calculate, analyze each area accounting of distance statistics point in each subregion, and respectively
The area in subregion face, recorded step d the result that software is calculated automatically）In the form of foundation；
H, method according to step e) and f) are respectively completed all steps c）Distance and face between each corresponding surface of middle subregion
Long-pending statistics, and all of result is recorded in the form that step d) sets up；
I, one division formula of the AutoSum function using Excel and setting, you can quickly complete percentage thickness
Statistics.
Further, step a）The CAD model file of middle opening is .iges or .step forms or .CATPart lattice
Formula, when model file is .model forms, using duplication, the method for stickup, by the model file of the .model forms that opens
In data message copy in the .CATPart formatted files newly-built using CATIA softwares, by the file of .model forms turn
Turn to CATPart forms.
Further, in the step b), the face that fits with car body panel beating is B faces, and a face in addition is A faces.
Further, the step c) is specially：Corresponding complex profile in partition member, and be named as and be named as
A2, A3, A4 ... An；B2, B3, B4 ... Bn, makes to meet that thickness direction is identical or Curvature varying one in the single region of segmentation
Cause；Until the burnishing surface of all corresponding up and down larger areas in remaining face, is named as A1 and B1.
Further, in the step f), the step value of distance statistics is set as 2.5mm.
Further, the step i) is specifically included：Area accounting of each distance statistics point in each subregion with each minute
Area's area is multiplied and obtains area of each distance statistics point in single subregion, then by each distance statistics point in single subregion
Area summation obtains the area of each distance statistics point；The area of each distance statistics point is respectively divided by the gross area and can be obtained by thickness
The statistics of percentage.
Preferably for the discrete regions using normal direction calculated thickness, or adopt self-defining direction phase
Same discrete regions, are individually calculated or are classified as one group and calculated；For the different discontinuous area in self-defining direction
Domain, then individually must be calculated.
Advantages of the present invention：Directly complete to calculate using the distance statistics calculating instrument of CATIA softwares, improve complexity
The statistical efficiency of face acoustic element percentage thickness, greatly shorten this work time, for same automobile front wall every
The statistics of sound pad, it is only necessary to which 6h can be completed, and the time of consuming reduces 85% than conventional method.Simultaneously using the process side of standard
Method carries out multidomain treat-ment to data, reduces the otherness of different personnel's statisticses, it is ensured that reality of the later stage to acoustic element
Apply the accuracy and validity of acoustics simulation calculation.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Fig. 2 is the schematic diagram of Excel statistical tables of the present invention.
Fig. 3 a and Fig. 3 b is area principle schematic diagram of the present invention.
Fig. 4 is not press area principle calculated thickness schematic diagram.
Fig. 5 traditional statistical method product subregion schematic diagrames.
The detailed subregion partial schematic diagram of Fig. 6 traditional statistical method products.
The schematic diagram of Fig. 7 traditional statistical method product thickness measurement results.
Schematic diagrames of the Fig. 8 for the embodiment of the present invention 1.
Schematic diagrames of the Fig. 9 for the embodiment of the present invention 2.
Schematic diagrames of the Figure 10 for the embodiment of the present invention 3.
Specific embodiment
With reference to concrete drawings and Examples, the invention will be further described.
A kind of thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis, comprises the steps：
A, startup 3D PaintShop CATIA, open the acoustic element CAD model for needing to carry out percentage thickness statistics
File.
B, two relative surfaces for extracting the acoustic element related to thickness measure, also referred to as A, B face, wherein with car body
The face of panel beating laminating is B faces, and a face in addition is A faces, and the measurement of thickness is converted into the survey to distance between two surfaces
Amount.
C, multidomain treat-ment, the principle of subregion is carried out in CATIA softwares to A, B face：Thickness direction in single cut zone
Answer identical or Curvature varying consistent.The thickness direction of calculating should be made identical with actual (real) thickness direction, it is to avoid occur inclining, hand over
Fork with compute repeatedly wait mistake phenomenon.
Concretely comprise the following steps：Corresponding complex profile in partition member（The different face of thickness direction, local curvature change compared with
Big face）, and A2 is named as, A3, A4 ... An；B2, B3, B4 ... Bn.Make in the single region of segmentation, to meet thickness direction phase
Same or Curvature varying is consistent.Until the burnishing surface of all corresponding up and down larger areas in remaining face, is named as A1 and B1.
Require during segmentation that the top and bottom of segmentation will correspond in a thickness direction.As shown in Figure 3 b, dotted line position is cut zone
Boundary position.
If not to part according to area principle process, THICKNESS CALCULATION direction will produce inclination, intersect and repeat to count
The wrong phenomenon such as calculation, causes result of calculation inaccurate, with reference to arrow direction indication in Fig. 4 dotted-line ellipse frames（With B faces as measuring
Beginning face）.
D, a Excel file of foundation, go value for thickness value, and train value is the partition number in step c), as shown in Figure 2.
E, in the distance of curved surface statistical tool of CATIA softwares：" first group " is the initial surface of measured thickness direction,
" second group " is terminal surface.Formulate the principle in thickness measure direction：For thickness direction identical continuum, first should make by oneself
Adopted measurement direction（Identical with thickness direction）, the starting point face in self-defined direction is initial surface, and terminal face is terminal surface, in such as Fig. 3 b
A1, B1, A2, B2, A4, B4, A6, B6, A7, B7 region.For face parallel up and down（Curvature varying is consistent, including plane with
Curved surface）Region, should use " normal direction " to measure, A3, B3 in such as Fig. 3 b, A5, B5 region, and B faces are initial surface, and A faces are termination
Face.
F, by CATIA software exchanges to Random Curved Surface Designing modular environment, call the distance of curved surface in software to measure analysis
Instrument.Then according to c）In subregion and e）Each area measure direction of middle determination carries out progressively statistical analysis.In order to counted
Accuracy, the step value of setpoint distance statistics is 2.5mm, is automatically performed the distance statistics on selected subregion by CATIA softwares
Calculate.
G, execution distance analysis are calculated, and calculate B faces（Or A faces）The area in upper subregion face.Finally software is counted automatically
The result of calculation recorded step d）In the form of foundation.
CATIA softwares can analyze each area accounting of distance statistics point in each subregion（Percentage）, then
Calculate the area of each subregion；
H, method according to step e) and f) are respectively completed all steps c）Distance and face between each corresponding surface of middle subregion
Long-pending statistics, and all of result is recorded in the form that step d) sets up.
I, one division formula of the AutoSum function using Excel and setting, you can quickly complete percentage thickness
Statistics.
As shown in the form in Fig. 2, area accounting of each distance statistics point in each subregion is multiplied with each Division area
Area of each distance statistics point in single subregion is obtained, then the area by each distance statistics point in single subregion is sued for peace
Area to each distance statistics point.The area of each distance statistics point is respectively divided by the gross area（A faces or B faces）Can be obtained by thickness
The statistics of degree percentage.
Fig. 2 is noted：VA1_5：Its subscript A1 represents that A1 subregions, subscript 5 represent that thickness is 5mm, total symbol VA1_5Represent 5mm
The shared percentage on A1 subregions of thickness, other the like；
In addition, for the discrete regions using normal direction calculated thickness, or identical using self-defining direction
Discrete regions, individually can calculate, it is also possible to be classified as one group and calculated.For different discontinuous in self-defining direction
Region, then individually must be calculated.
Embodiment 1：A kind of percentage thickness statistics of carpet sound insulating pad product
A, startup 3D PaintShop CATIA, open the carpet sound insulating pad CAD mould for needing to carry out percentage thickness statistics
Type file.
B, two surfaces up and down for extracting the carpet sound insulating pad related to thickness measure（A faces and B faces）, wherein with car body metal plate
The face of gold laminating is B faces, and a face in addition is A faces, and the measurement of thickness is converted into the measurement to distance between two surfaces.
C, segmentation multidomain treat-ment is carried out to A, B face in CATIA softwares, the carpet sound insulating pad is carried out according to area principle
Subregion, is divided into and is cut into 10 zonings（A1 ..., A10）, solid line is the partitioning boundary in each region.As shown in figure 8, in figure only
Display mark is carried out to A faces, and B faces are corresponding with A faces.
D, a Excel file of foundation（As shown in Figure 2）, row value is thickness value, and train value is the partition number in step c)
（As shown in Figure 8）.
In e, distance of curved surface statistical tool：Principle according to thickness measure direction is to step c）In subregion travel direction true
Fixed.For the discrete regions using normal direction calculated thickness, or adopt the discontinuous area of self-defining direction identical
Domain, individually can calculate, it is also possible to be classified as one group and calculated.For the different discrete regions in self-defining direction, then must
Individually must be calculated.
F, by CATIA software exchanges to Random Curved Surface Designing modular environment, call the distance of curved surface in software to measure analysis
Instrument.Then according to c）In subregion and e）Each area measure direction of middle determination carries out progressively statistical analysis.Setpoint distance is united
The step value of meter is 2.5mm, is automatically performed the distance statistics on selected subregion by CATIA softwares and calculates.
G, execution distance analysis are calculated, and calculate the area in subregion face on B faces.The result note that finally software is calculated automatically
Record step d）In the form of foundation.
H, method according to step e) and f) are respectively completed all steps c）Distance and face between each corresponding surface of middle subregion
Long-pending statistics, and all of result is recorded in the form that step d) sets up.
I, one division formula of the AutoSum function using Excel and setting, you can quickly complete percentage thickness
Statistics.
Embodiment 2：The percentage thickness statistics of another kind of carpet sound insulating pad product
A, startup 3D PaintShop CATIA, open the carpet sound insulating pad CAD mould for needing to carry out percentage thickness statistics
Type file.
B, two surfaces up and down for extracting the carpet sound insulating pad related to thickness measure（A faces and B faces）, wherein with car body metal plate
The face of gold laminating is B faces, and a face in addition is A faces, and the measurement of thickness is converted into the measurement to distance between two surfaces.
C, segmentation multidomain treat-ment is carried out to A, B face in CATIA softwares, the carpet sound insulating pad is carried out according to area principle
Subregion, is divided into and is cut into 9 zonings（B1 ..., B9）, solid line is the partitioning boundary in each region.As shown in figure 9, only to B in figure
Face carries out display mark, and A faces are corresponding with B faces.
D, a Excel file of foundation（As shown in Figure 2）, row value is thickness value, and train value is the partition number in step c)
（As shown in Figure 9）.
In e, distance of curved surface statistical tool：Principle according to thickness measure direction is to step c）In subregion travel direction true
Fixed.For the discrete regions using normal direction calculated thickness, or adopt the discontinuous area of self-defining direction identical
Domain, individually can calculate, it is also possible to be classified as one group and calculated.For the different discrete regions in self-defining direction, then must
Individually must be calculated.
F, by CATIA software exchanges to Random Curved Surface Designing modular environment, call the distance of curved surface in software to measure analysis
Instrument.Then according to c）In subregion and e）Each area measure direction of middle determination carries out progressively statistical analysis.Setpoint distance is united
The step value of meter is 2.5mm, is automatically performed the distance statistics on selected subregion by CATIA softwares and calculates.
G, execution distance analysis are calculated, and calculate the area in subregion face on B faces.The result note that finally software is calculated automatically
Record step d）In the form of foundation.
H, method according to step e) and f) are respectively completed all steps c）Distance and face between each corresponding surface of middle subregion
Long-pending statistics, and all of result is recorded in the form that step d) sets up.
I, one division formula of the AutoSum function using Excel and setting, you can quickly complete percentage thickness
Statistics.
Embodiment 3：A kind of percentage thickness statistics of front wall sound-isolation pad product
A, startup 3D PaintShop CATIA, open the carpet sound insulating pad CAD mould for needing to carry out percentage thickness statistics
Type file.
B, two surfaces up and down for extracting the carpet sound insulating pad related to thickness measure（A faces and B faces）, wherein with car body metal plate
The face of gold laminating is B faces, and a face in addition is A faces, and the measurement of thickness is converted into the measurement to distance between two surfaces.
C, segmentation multidomain treat-ment is carried out to A, B face in CATIA softwares, the carpet sound insulating pad is carried out according to area principle
Subregion, is divided into and is cut into 6 zonings（B11 ..., B16）, solid line is the partitioning boundary in each region.As shown in Figure 10, in figure only
Display mark is carried out to B faces, and A faces are corresponding with B faces.
D, a Excel file of foundation（As shown in Figure 2）, row value is thickness value, and train value is the partition number in step c)
（As shown in Figure 10）.
In e, distance of curved surface statistical tool：Principle according to thickness measure direction is to step c）In subregion travel direction true
Fixed.For the discrete regions using normal direction calculated thickness, or adopt the discontinuous area of self-defining direction identical
Domain, individually can calculate, it is also possible to be classified as one group and calculated.For the different discrete regions in self-defining direction, then must
Individually must be calculated.
F, by CATIA software exchanges to Random Curved Surface Designing modular environment, call the distance of curved surface in software to measure analysis
Instrument.Then according to c）In subregion and e）Each area measure direction of middle determination carries out progressively statistical analysis.Setpoint distance is united
The step value of meter is 2.5mm, is automatically performed the distance statistics on selected subregion by CATIA softwares and calculates.
G, execution distance analysis are calculated, and calculate the area in subregion face on B faces.The result note that finally software is calculated automatically
Record step d）In the form of foundation.
H, method according to step e) and f) are respectively completed all steps c）Distance and face between each corresponding surface of middle subregion
Long-pending statistics, and all of result is recorded in the form that step d) sets up.
I, one division formula of the AutoSum function using Excel and setting, you can quickly complete percentage thickness
Statistics.
Claims (6)
1. a kind of thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis, it is characterised in that include
Following steps：
A, startup 3D PaintShop CATIA, opening needs the acoustic element CAD model for carrying out percentage thickness statistics text
Part；
B, referred to as two relative surfaces for extracting the acoustic element related to thickness measure, A, B face；The measurement of thickness is converted
It is the measurement to distance between two surfaces of A, B；
C, multidomain treat-ment is carried out in CATIA softwares to A, B face, the principle of subregion is：Thickness direction phase in single cut zone
Same or Curvature varying is consistent；And the thickness direction for causing to calculate is identical with actual (real) thickness direction；
D, a Excel file of foundation, go value for thickness value, and train value is the partition number in step c)；
E, the principle in the distance of curved surface statistical tool of CATIA softwares, formulating thickness measure direction：1), for thickness direction
Identical continuum, using thickness direction as self-defined measurement direction, the starting point face in self-defined direction is initial surface, terminal face
For terminal surface；2), for the region in face parallel up and down, " normal direction " measurement is used；
F, by CATIA software exchanges to Random Curved Surface Designing modular environment, call the distance of curved surface in software to measure analysis tool；
A distance statistics step value is set, then according to step c）In subregion and step e）Enter in each area measure direction of middle determination
Row progressively statistical analysis；
G, execution distance analysis are calculated, and analyze each area accounting of distance statistics point in each subregion, and each subregion
The area in face, recorded step d the result that software is calculated automatically）In the form of foundation；
H, method according to step e) and f) are respectively completed all steps c）Distance and area between each corresponding surface of middle subregion
Statistics, and all of result is recorded in the form that step d) sets up；
I, one division formula of the AutoSum function using Excel and setting, you can quickly complete the statistics of percentage thickness；
The step i) is specifically included：Area accounting of each distance statistics point in each subregion is multiplied with each Division area and is obtained
Area of each distance statistics point in single subregion, the then area summation by each distance statistics point in single subregion obtains each
The area of distance statistics point；The area of each distance statistics point is respectively divided by the statistical number that the gross area can be obtained by percentage thickness
According to；The gross area：A faces or B faces.
2. the thickness statistical method of the complex profile acoustic part of automobile of CAE simulation analysis is used for as claimed in claim 1, its
It is characterised by：
Step a）The CAD model file of middle opening is .iges or .step forms or .CATPart forms, works as model file
For .model forms when, using duplication, the method for stickup, the data message in the model file of the .model forms of opening is copied
The file translations of .model forms, in using the newly-built .CATPart formatted files of CATIA softwares, are CATPart lattice by shellfish
Formula.
3. the thickness statistical method of the complex profile acoustic part of automobile of CAE simulation analysis is used for as claimed in claim 1, its
It is characterised by：
In the step b), the face that fits with car body panel beating is B faces, and a face in addition is A faces.
4. the thickness statistical method of the complex profile acoustic part of automobile of CAE simulation analysis is used for as claimed in claim 1, its
It is characterised by：
The step c) is specially：Corresponding complex profile in partition member, and A2 is named as, A3, A4 ... An；B2, B3,
B4 ... Bn, make to meet that thickness direction is identical or Curvature varying is consistent in the single region of segmentation；Until remaining face is all
The burnishing surface of corresponding larger area, is named as A1 and B1 up and down.
5. the thickness statistical method of the complex profile acoustic part of automobile of CAE simulation analysis is used for as claimed in claim 1, its
It is characterised by：
In the step f), the step value of distance statistics is set as 2.5mm.
6. the thickness statistical method of the complex profile acoustic part of automobile of CAE simulation analysis is used for as claimed in claim 1, its
It is characterised by：
For the discrete regions using normal direction calculated thickness, or adopt the discontinuous area of self-defining direction identical
Domain, is individually calculated or is classified as one group and calculated；For the different discrete regions in self-defining direction, then must be individually
Calculated.
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| 汽车车内隔音垫中PE膜对其吸声性能的影响分析;田秀杰等;《噪声与震动控制》;20121030;全文 * |
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