CN104036085A - Thickness statistical method for complex-surface car acoustic part for CAE simulation analysis - Google Patents
Thickness statistical method for complex-surface car acoustic part for CAE simulation analysis Download PDFInfo
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Abstract
The invention provides a thickness statistical method for a complex-surface car acoustic part for CAE simulation analysis. The method includes: starting CATIA software, and opening a car acoustic part CAD model file; extracting a complex surface A and a complex surface B which are related to thickness measuring; segmenting the complex surface A and the complex surface B in the CATIA software; using thickness as row value and partition label as line value to build a thickness information statistical table; setting the thickness calculation direction of each partition; executing distance statistical calculation of each partition, measuring the area of the partition surface of the complex surface B, and recording calculation results in an Excel file; completing statistical calculation of all partitions one by one, and recording the calculation results in the Excel file; using the calculation function of Excel to complete final thickness percentage statistical calculation. The method is convenient to operate, a product is partitioned by a standard processing method, and statistical result differences of different staffs are reduced.
Description
Technical field
The present invention relates to a kind of statistical calculation method, especially utilize Three-dimensional CAD Software mean camber apart from a method for testing tool express statistic calculation of complex profile acoustic part of automobile thickness number percent, belong to acoustic part of automobile and adopt statistics energy (SEA) method to carry out the technical field of acoustical behavior CAE simulation analysis.
Background technology
When adopting statistical Energy Analysis Approach to carry out CAE (computer-aided engineering) simulation analysis to the sound-absorbing of acoustic element, sound insulation value, the thickness percent profile that all needs statistical acoustics parts: from 5mm, maximum ga(u)ge to product, as 35mm, 5mm be take as interval in centre, calculates respectively the total area of every kind of thickness correspondence in product and the ratio of whole product area.The deviation that wherein each thickness allowed in when statistics is ± 2.5mm, take 10mm as example, and when statistics, by thickness, the region within the scope of 7.5mm≤t<12.5mm is all designated as in the area of 10mm thickness.
1), take 100mm * 100mm as a square traditional statistical method is:, whole product is carried out to subregion (as Fig. 5); 2), add up one by one the shared area of each thickness of product in each square; 3), same thickness, the area in All Ranges is added up mutually; 4), the total area divided by product the total area of each thickness.In this process, first need the square of a 100mm * 100mm to continue to be divided into less square (as Fig. 6, Fig. 7), as 20mm * 20mm, and then the thickness (as Fig. 7) of the product in each 20mm * 20mm square of hand dipping, insert in a graticule identical with product block plan, the shared square number of last each thickness of manual statistical computation, calculates the percent profile situation of each thickness.Very consuming time in this way, complete the statistics of an automobile front wall sound-isolation pad thickness, need to spend the time more than 40h, and different personnel, owing to measuring the difference of gimmick, the result of statistics also there will be very large difference, and while causing carrying out acoustical behavior calculating in the later stage, the accuracy of result of calculation is difficult to be guaranteed.
Therefore, make the statistical method of the complex profile acoustic element thickness number percent that a kind of efficiency is high, accuracy is high, reliability is high, for the acoustical behavior CAE simulation analysis of successful enforcement auto parts and components, have very important significance.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of method of adding up complex profile acoustic element thickness number percent is provided.It is easy to operate, has improved work efficiency, wide accommodation, and statistics can not vary with each individual, thereby has guaranteed the accuracy of acoustics CAE simulation analysis result.The technical solution used in the present invention is:
A thickness statistical method for the complex profile acoustic part of automobile of CAE simulation analysis, comprises the steps:
A, startup 3D PaintShop CATIA, open the acoustic element cad model file that need to carry out thickness number percent statistics;
Two relative surfaces of b, acoustic element that extraction is relevant to thickness measure, are called A, B face; The measurement of thickness is converted into the measurement to distance between A, two surfaces of B;
C, in CATIA software, A, B face are carried out to subregion processing, the principle of subregion is: in single cut zone, the identical or curvature of thickness direction changes consistent; And make the thickness direction of calculating identical with actual (real) thickness direction;
D, set up a Excel file, row value is one-tenth-value thickness 1/10, and train value is step c) in partition number;
E, in the distance of curved surface statistical tool of CATIA software, formulate the principle of thickness measure direction:
for the identical continuum of thickness direction, using thickness direction as self-defined direction of measurement, the starting point face of self-defined direction is initial surface, and terminal face is terminal surface;
for the region of upper and lower parallel face, use " normal direction " to measure;
F, by CATIA software exchange to Random Curved Surface Designing modular environment, call the distance of curved surface Measurement and analysis instrument in software; Set a distance statistics step value, then according to c) in subregion and e) in each area measure direction of determining carry out progressively statistical study;
G, execution distance analysis calculate, and analyze the area accounting of each distance statistics point in each subregion, and the area of each subregion face, in the form that the outcome record that software is calculated is automatically set up to step d);
H, according to step e) and method f) complete respectively the statistics of distance and area between each corresponding surface of subregion in all step c), and all outcome record to steps d) in the form set up;
I, utilize the AutoSum function of Excel and set a division formula, can complete rapidly the statistics of thickness number percent.
Further, the cad model file of opening in described step a) is .iges or .step form or .CATPart form, when model file is .model form, employing copies, the method of pasting, data message in the model file of the .model form of opening is copied to and adopted in the newly-built .CATPart formatted file of CATIA software, the file of .model form is converted into CATPart form.
Further, described step b) in, the face of fitting with car body panel beating is B face, a face is in addition A face.
Further, described step c) be specially: corresponding complex profile in partition member, and called after called after A2, A3, A4 ... An; B2, B3, B4 ... Bn, meets the identical or curvature of thickness direction and changes consistent in the single region that makes to cut apart; Until remaining face is all upper and lower corresponding larger area burnishing surface, called after A1 and B1.
Further, described step f) in, the step value of distance statistics is set as 2.5mm.
Further, described step I) specifically comprise: the area accounting of each distance statistics point in each subregion and each Division area multiply each other and obtain the area of each distance statistics point in single subregion, then by each distance statistics point, the summation of the area in single subregion obtains the area of each distance statistics point; The area of each distance statistics point just can obtain the statistics of thickness number percent divided by the total area respectively.
Preferably, for the discontinuous region that adopts normal direction calculated thickness, or adopt the discontinuous region that self-defining direction is identical, calculate separately or be classified as one group and calculate; For the different discontinuous region of self-defining direction, must calculate separately.
Advantage of the present invention: directly utilize the distance statistics computational tool of CATIA software to complete calculating, promoted the statistical efficiency of complex profile acoustic element thickness number percent, shortened greatly the time of this work, statistics for same automobile front wall sound-isolation pad, only need 6h to complete, the time of expending has reduced 85% than classic method.Adopt the disposal route of standard to carry out subregion processing to data simultaneously, reduced the otherness of different personnel's statisticses, guaranteed accuracy and the validity of later stage to the enforcement acoustics simulation calculation of acoustic element.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is the schematic diagram of Excel statistical table of the present invention.
Fig. 3 a and Fig. 3 b are area principle schematic diagram of the present invention.
Fig. 4 is not for pressing area principle calculated thickness schematic diagram.
Fig. 5 traditional statistical method product subregion schematic diagram.
The detailed subregion partial schematic diagram of Fig. 6 traditional statistical method product.
The schematic diagram of Fig. 7 traditional statistical method product thickness measurement result.
Fig. 8 is the schematic diagram of the embodiment of the present invention 1.
Fig. 9 is the schematic diagram of the embodiment of the present invention 2.
Figure 10 is the schematic diagram of the embodiment of the present invention 3.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
A thickness statistical method for the complex profile acoustic part of automobile of CAE simulation analysis, comprises the steps:
A, startup 3D PaintShop CATIA, open the acoustic element cad model file that need to carry out thickness number percent statistics.
Two relative surfaces of b, acoustic element that extraction is relevant to thickness measure, also referred to as A, B face, are wherein B face with the face of car body panel beating laminating, and a face is in addition A face, and the measurement of thickness is converted into the measurement to distance between two surfaces.
C, in CATIA software, A, B face are carried out to subregion processing, the principle of subregion: in single cut zone thickness direction should be identical or curvature change should be consistent.Should make the thickness direction of calculating identical with actual (real) thickness direction, avoid occurring the wrong phenomenons such as inclination, intersection and double counting.
Concrete steps are: corresponding complex profile in partition member (different face, the local curvatures of thickness direction changes faces greatly), and called after A2, and A3, A4 ... An; B2, B3, B4 ... Bn.In the single region that makes to cut apart, meeting the identical or curvature of thickness direction changes consistent.Until remaining face is all upper and lower corresponding larger area burnishing surface, called after A1 and B1.The top and bottom that while cutting apart, requirement is cut apart are corresponding one by one on thickness direction.As shown in Figure 3 b, the boundary position that dotted line position is cut zone.
If part is not processed according to area principle, THICKNESS CALCULATION direction will produce the wrong phenomenons such as inclination, intersection and double counting, causes result of calculation inaccurate, with reference to arrow direction indication in the oval dotted line frame of figure 4 (take B face as measuring initial surface).
D, set up a Excel file, row value is one-tenth-value thickness 1/10, and train value is step c) in partition number, as shown in Figure 2.
E, in the distance of curved surface statistical tool of CATIA software: " first group " is the initial surface of measured thickness direction, and " second group " is terminal surface.Formulate the principle of thickness measure direction:
for the identical continuum of thickness direction, should first self-defined direction of measurement (identical with thickness direction), the starting point face of self-defined direction is initial surface, terminal face is terminal surface, as A1, B1 in Fig. 3 b, A2, B2, A4, B4, A6, B6, A7, B7 region.
for upper and lower parallel face (curvature changes consistent, comprises plane and curved surface) region, should use " normal direction " to measure, as A3, B3 in Fig. 3 b, A5, B5 region, B face is initial surface, A face is terminal surface.
F, by CATIA software exchange to Random Curved Surface Designing modular environment, call the distance of curved surface Measurement and analysis instrument in software.Then according to c) in subregion and e) in each area measure direction of determining carry out progressively statistical study.For the accuracy of adding up, the step value of setpoint distance statistics is 2.5mm, and the distance statistics automatically being completed on selected subregion by CATIA software is calculated.
G, execution distance analysis calculate, and calculate the area of the upper subregion face of B face (or A face).In the form that the outcome record of finally software being calculated is automatically set up to step d).
CATIA software can analyze the area accounting (number percent) of each distance statistics point in each subregion, then calculates the area of each subregion;
H, according to step e) and method f) complete respectively the statistics of distance and area between each corresponding surface of subregion in all step c), and all outcome record to steps d) in the form set up.
I, utilize the AutoSum function of Excel and set a division formula, can complete rapidly the statistics of thickness number percent.
As shown in the form in Fig. 2, the area accounting of each distance statistics point in each subregion and each Division area multiply each other and obtain the area of each distance statistics point in single subregion, and then by each distance statistics point, the summation of the area in single subregion obtains the area of each distance statistics point.The area of each distance statistics point just can obtain respectively the statistics of thickness number percent divided by the total area (A face or B face).
Fig. 2 note: V
a1_5: its subscript A1 represents A1 subregion, and subscript 5 represents that thickness is 5mm, total symbol V
a1_5represent 5mm thickness shared number percent on A1 subregion, other the like;
In addition, for the discontinuous region that adopts normal direction calculated thickness, or adopt the discontinuous region that self-defining direction is identical, can calculate separately, also can be classified as one group and calculate.For the different discontinuous region of self-defining direction, must calculate separately.
Embodiment 1: a kind of thickness number percent statistics of carpet sound insulating pad product
A, startup 3D PaintShop CATIA, open the carpet sound insulating pad cad model file that need to carry out thickness number percent statistics.
Two surfaces (A face and B face) up and down of b, carpet sound insulating pad that extraction is relevant to thickness measure, are wherein B face with the face of car body panel beating laminating, and a face is in addition A face, and the measurement of thickness is converted into the measurement to distance between two surfaces.
C, in CATIA software, A, B face are cut apart to subregion and process, according to area principle, this carpet sound insulating pad is carried out to subregion, be divided into be slit into 10 zonings (A1 ..., A10), the partitioning boundary that solid line is each region.As shown in Figure 8, in figure, only A face is shown to mark, B face is corresponding with A face.
D, set up a Excel file (as shown in Figure 2), row value is one-tenth-value thickness 1/10, and train value is step c) in partition number (as shown in Figure 8).
In e, distance of curved surface statistical tool: according to the principle of thickness measure direction, the subregion travel direction in step c) is determined.For the discontinuous region that adopts normal direction calculated thickness, or adopt the discontinuous region that self-defining direction is identical, can calculate separately, also can be classified as one group and calculate.For the different discontinuous region of self-defining direction, must calculate separately.
F, by CATIA software exchange to Random Curved Surface Designing modular environment, call the distance of curved surface Measurement and analysis instrument in software.Then according to c) in subregion and e) in each area measure direction of determining carry out progressively statistical study.The step value of setpoint distance statistics is 2.5mm, and the distance statistics automatically being completed on selected subregion by CATIA software is calculated.
G, execution distance analysis calculate, and calculate the area of subregion face on B face.In the form that the outcome record of finally software being calculated is automatically set up to step d).
H, according to step e) and method f) complete respectively the statistics of distance and area between each corresponding surface of subregion in all step c), and all outcome record to steps d) in the form set up.
I, utilize the AutoSum function of Excel and set a division formula, can complete rapidly the statistics of thickness number percent.
Embodiment 2: the thickness number percent statistics of another kind of carpet sound insulating pad product
A, startup 3D PaintShop CATIA, open the carpet sound insulating pad cad model file that need to carry out thickness number percent statistics.
Two surfaces (A face and B face) up and down of b, carpet sound insulating pad that extraction is relevant to thickness measure, are wherein B face with the face of car body panel beating laminating, and a face is in addition A face, and the measurement of thickness is converted into the measurement to distance between two surfaces.
C, in CATIA software, A, B face are cut apart to subregion and process, according to area principle, this carpet sound insulating pad is carried out to subregion, be divided into be slit into 9 zonings (B1 ..., B9), the partitioning boundary that solid line is each region.As shown in Figure 9, in figure, only B face is shown to mark, A face is corresponding with B face.
D, set up a Excel file (as shown in Figure 2), row value is one-tenth-value thickness 1/10, and train value is step c) in partition number (as shown in Figure 9).
In e, distance of curved surface statistical tool: according to the principle of thickness measure direction, the subregion travel direction in step c) is determined.For the discontinuous region that adopts normal direction calculated thickness, or adopt the discontinuous region that self-defining direction is identical, can calculate separately, also can be classified as one group and calculate.For the different discontinuous region of self-defining direction, must calculate separately.
F, by CATIA software exchange to Random Curved Surface Designing modular environment, call the distance of curved surface Measurement and analysis instrument in software.Then according to c) in subregion and e) in each area measure direction of determining carry out progressively statistical study.The step value of setpoint distance statistics is 2.5mm, and the distance statistics automatically being completed on selected subregion by CATIA software is calculated.
G, execution distance analysis calculate, and calculate the area of subregion face on B face.In the form that the outcome record of finally software being calculated is automatically set up to step d).
H, according to step e) and method f) complete respectively the statistics of distance and area between each corresponding surface of subregion in all step c), and all outcome record to steps d) in the form set up.
I, utilize the AutoSum function of Excel and set a division formula, can complete rapidly the statistics of thickness number percent.
Embodiment 3: a kind of thickness number percent statistics of front wall sound-isolation pad product
A, startup 3D PaintShop CATIA, open the carpet sound insulating pad cad model file that need to carry out thickness number percent statistics.
Two surfaces (A face and B face) up and down of b, carpet sound insulating pad that extraction is relevant to thickness measure, are wherein B face with the face of car body panel beating laminating, and a face is in addition A face, and the measurement of thickness is converted into the measurement to distance between two surfaces.
C, in CATIA software, A, B face are cut apart to subregion and process, according to area principle, this carpet sound insulating pad is carried out to subregion, be divided into be slit into 6 zonings (B11 ..., B16), the partitioning boundary that solid line is each region.As shown in figure 10, in figure, only B face is shown to mark, A face is corresponding with B face.
D, set up a Excel file (as shown in Figure 2), row value is one-tenth-value thickness 1/10, and train value is step c) in partition number (as shown in figure 10).
In e, distance of curved surface statistical tool: according to the principle of thickness measure direction, the subregion travel direction in step c) is determined.For the discontinuous region that adopts normal direction calculated thickness, or adopt the discontinuous region that self-defining direction is identical, can calculate separately, also can be classified as one group and calculate.For the different discontinuous region of self-defining direction, must calculate separately.
F, by CATIA software exchange to Random Curved Surface Designing modular environment, call the distance of curved surface Measurement and analysis instrument in software.Then according to c) in subregion and e) in each area measure direction of determining carry out progressively statistical study.The step value of setpoint distance statistics is 2.5mm, and the distance statistics automatically being completed on selected subregion by CATIA software is calculated.
G, execution distance analysis calculate, and calculate the area of subregion face on B face.In the form that the outcome record of finally software being calculated is automatically set up to step d).
H, according to step e) and method f) complete respectively the statistics of distance and area between each corresponding surface of subregion in all step c), and all outcome record to steps d) in the form set up.
I, utilize the AutoSum function of Excel and set a division formula, can complete rapidly the statistics of thickness number percent.
Claims (7)
1. for a thickness statistical method for the complex profile acoustic part of automobile of CAE simulation analysis, it is characterized in that, comprise the steps:
A, startup 3D PaintShop CATIA, open the acoustic element cad model file that need to carry out thickness number percent statistics;
Two relative surfaces of b, acoustic element that extraction is relevant to thickness measure, are called A, B face; The measurement of thickness is converted into the measurement to distance between A, two surfaces of B;
C, in CATIA software, A, B face are carried out to subregion processing, the principle of subregion is: in single cut zone, the identical or curvature of thickness direction changes consistent; And make the thickness direction of calculating identical with actual (real) thickness direction;
D, set up a Excel file, row value is one-tenth-value thickness 1/10, and train value is step c) in partition number;
E, in the distance of curved surface statistical tool of CATIA software, formulate the principle of thickness measure direction:
for the identical continuum of thickness direction, using thickness direction as self-defined direction of measurement, the starting point face of self-defined direction is initial surface, and terminal face is terminal surface;
for the region of upper and lower parallel face, use " normal direction " to measure;
F, by CATIA software exchange to Random Curved Surface Designing modular environment, call the distance of curved surface Measurement and analysis instrument in software; Set a distance statistics step value, then according to c) in subregion and e) in each area measure direction of determining carry out progressively statistical study;
G, execution distance analysis calculate, and analyze the area accounting of each distance statistics point in each subregion, and the area of each subregion face, in the form that the outcome record that software is calculated is automatically set up to step d);
H, according to step e) and method f) complete respectively the statistics of distance and area between each corresponding surface of subregion in all step c), and all outcome record to steps d) in the form set up;
I, utilize the AutoSum function of Excel and set a division formula, can complete rapidly the statistics of thickness number percent.
2. the thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis as claimed in claim 1, is characterized in that:
The cad model file of opening in described step a) is .iges or .step form or .CATPart form, when model file is .model form, employing copies, the method of pasting, data message in the model file of the .model form of opening is copied to and adopted in the newly-built .CATPart formatted file of CATIA software, the file of .model form is converted into CATPart form.
3. the thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis as claimed in claim 1, is characterized in that:
Described step b) in, the face of fitting with car body panel beating is B face, and a face is in addition A face.
4. the thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis as claimed in claim 1, is characterized in that:
Described step c) be specially: corresponding complex profile in partition member, and called after A2, A3, A4 ... An; B2, B3, B4 ... Bn, meets the identical or curvature of thickness direction and changes consistent in the single region that makes to cut apart; Until remaining face is all upper and lower corresponding larger area burnishing surface, called after A1 and B1.
5. the thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis as claimed in claim 1, is characterized in that:
Described step f), in, the step value of distance statistics is set as 2.5mm.
6. the thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis as claimed in claim 1, is characterized in that:
Described step I) specifically comprise: the area accounting of each distance statistics point in each subregion and each Division area multiply each other and obtain the area of each distance statistics point in single subregion, then by each distance statistics point, the summation of the area in single subregion obtains the area of each distance statistics point; The area of each distance statistics point just can obtain the statistics of thickness number percent divided by the total area respectively.
7. the thickness statistical method of the complex profile acoustic part of automobile for CAE simulation analysis as claimed in claim 1, is characterized in that:
For the discontinuous region that adopts normal direction calculated thickness, or adopt the discontinuous region that self-defining direction is identical, calculate separately or be classified as one group and calculate; For the different discontinuous region of self-defining direction, must calculate separately.
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| CN110334327A (en) * | 2019-05-17 | 2019-10-15 | 深圳市华阳国际工程设计股份有限公司 | Automatic generation method, device and the storage device of area information |
| CN110990961A (en) * | 2020-03-04 | 2020-04-10 | 江西昌河汽车有限责任公司 | Method for calculating opening and closing force of air spring of automobile tail door |
| CN111913188A (en) * | 2020-09-11 | 2020-11-10 | 天津航天长征火箭制造有限公司 | Automatic measuring device and method for thickness of aerospace large-size wall plate |
| CN114021532A (en) * | 2021-10-28 | 2022-02-08 | 苏州孝义家光电科技有限公司 | Automatic processing method for acoustic data of dustproof and waterproof sound-transmitting membrane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105373649A (en) * | 2015-10-13 | 2016-03-02 | 同济汽车设计研究院有限公司 | Method for optimizing sound package based on composite wall sound insulation theory |
| CN105373649B (en) * | 2015-10-13 | 2019-01-15 | 同济汽车设计研究院有限公司 | A method of the optimization acoustics packet based on faced wall sound insulating theory |
| CN110334327A (en) * | 2019-05-17 | 2019-10-15 | 深圳市华阳国际工程设计股份有限公司 | Automatic generation method, device and the storage device of area information |
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| CN110990961A (en) * | 2020-03-04 | 2020-04-10 | 江西昌河汽车有限责任公司 | Method for calculating opening and closing force of air spring of automobile tail door |
| CN111913188A (en) * | 2020-09-11 | 2020-11-10 | 天津航天长征火箭制造有限公司 | Automatic measuring device and method for thickness of aerospace large-size wall plate |
| CN114021532A (en) * | 2021-10-28 | 2022-02-08 | 苏州孝义家光电科技有限公司 | Automatic processing method for acoustic data of dustproof and waterproof sound-transmitting membrane |
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