CN104573141A - Weld joint connection simulation method based on finite element analysis - Google Patents
Weld joint connection simulation method based on finite element analysis Download PDFInfo
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- CN104573141A CN104573141A CN201310469136.2A CN201310469136A CN104573141A CN 104573141 A CN104573141 A CN 104573141A CN 201310469136 A CN201310469136 A CN 201310469136A CN 104573141 A CN104573141 A CN 104573141A
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000004458 analytical method Methods 0.000 title claims abstract description 37
- 238000004088 simulation Methods 0.000 title claims abstract description 17
- 229910000679 solder Inorganic materials 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 38
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention provides a weld joint connection simulation method based on finite element analysis. The method comprises the following steps: determining an actual size of a weld joint, and determining a heat effect region for the weld joint as well as the size and the thickness of a grid in a weld nugget region according to the actual size of the weld joint; carrying out finite element modeling on the weld joint according to the determined heat effect region for the weld joint as well as the size and the thickness of the grid in the weld nugget region according to the actual size of the weld joint. The weld joint connection simulation method disclosed by the invention is high in simulation precision.
Description
Technical field
The present invention relates to solder design analogy method, more specifically, relate to the solder design analogy method based on finite element analysis.
Background technology
Current, growing and universal along with vehicle, carries out modeling (such as CAE(computer-aided engineering) model by finite element method to the seam weldering used in Rail car manufacture) with accurate simulation solder design and and then analyze and determine the intensity of corresponding structure, fatigue resistence, crash-worthiness and NVH(noise, vibration and sound vibration roughness) etc. characteristic become more and more important.
Existing two kinds of basic functional principle based on the solder design analogy method of finite element analysis are as follows: solder design, in first kind of way, is defined as being rigidly connected between two plates, and adopts rigid element to simulate by (1); (2) in the second way, employing flexibly connects, but weld seam is defined as the thickness of two web joints, and its material properties is equal to the material properties of two web joints.
But, there are the following problems for existing technical scheme: (1) is for the first scheme, be rigidly connected due to solder design is defined as simply, therefore the unit of junction can be caused to suddenly change, thus cause the analog result in this region untrue (namely difference is larger compared with actual), cause the effectiveness comparison of simulation coarse thus; (2) for first scheme, the unit sudden change of junction is which obviated, but owing to not considering the impact in heat-affected zone and nugget district, therefore solder design model is still fairly simple, causes the effect of simulation still more coarse thus.
Therefore, there is following demand: provide the solder design analogy method based on finite element analysis with high simulation degree of accuracy.
Summary of the invention
In order to solve the problem existing for above-mentioned prior art, the present invention proposes the solder design analogy method based on finite element analysis with high simulation degree of accuracy.
The object of the invention is to be achieved through the following technical solutions:
Based on a solder design analogy method for finite element analysis, described method comprises the following steps:
(A1) determine the size of actual weld seam and determine size and the thickness of the heat-affected zone of described weld seam and the grid in nugget region according to the size of the weld seam of reality;
(A2) based on the size of the grid in the determined heat-affected zone for described weld seam and nugget region and thickness, finite element modeling is carried out to described weld seam.
In scheme disclosed above, preferably, described step (A2) comprises further:
(B1) according to the grid in the determined heat-affected zone for described weld seam, the first row cell formation of contiguous described weld seam is become heat-affected zone domain model;
(B2) according to the grid in the determined nugget region for described weld seam, the cell formation of position while welding and clinch office is become nugget regional model.
In scheme disclosed above, preferably, described step (B1) comprises further: according to the size cutting heat-affected zone geometric model of the grid in the determined heat-affected zone for described weld seam.
In scheme disclosed above, preferably, described step (B2) comprises further: according to the size cutting nugget region geometry model of the grid in the determined nugget region for described weld seam.
In scheme disclosed above, preferably, described step (A2) comprises further: in the inward flange geometry of extraction welded seam area, face is with grid division; Adjustment and optimize the inward flange grid that divides, thus the grid node in described heat-affected zone and described nugget region can one_to_one corresponding; Be that material properties is given in described heat-affected zone and described nugget region according to designing requirement, and give described heat-affected zone and described nugget region respectively by the gauge of the grid in the determined heat-affected zone for described weld seam and nugget region.
In scheme disclosed above, preferably, described step (A2) comprises further: be connected, the grid node of described heat-affected zone with the correspondence in described nugget region to simulate the solder design between two parts one by one with two-dimentional shell unit.
In scheme disclosed above, preferably, described method comprises further: the solder design models applying based on finite element will set up by step (A1)-(A2) is in Integral automobile structure of finite element analysis model.
In scheme disclosed above, preferably, based on the size of the heat-affected zone of weld seam as described in determining as under type and the grid in nugget region: the unit size in (1) heat-affected zone is: a
l=L2, b
l=L2, d
l=L2, wherein, a
lthe sheet material simulated heat-affected zone grid a length dimension of to be thickness be t1; b
l, d
lthe sheet material simulated heat-affected zone grid b of to be thickness be t2, d length dimension, L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness; 2) unit size in nugget region is: c
l=L2/2, wherein, c
lthe length dimension of to be thickness the be simulation nugget district grid of t2 sheet material, L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness.
In scheme disclosed above, preferably, based on the thickness of the heat-affected zone of weld seam as described in determining as under type and the grid in nugget region: the element thickness in (1) heat-affected zone is: a
t=t1+ (L1/2), b
t=t2+ (L2/2), d
t=t2+ (L1/2), wherein, a
tthe sheet material simulated heat-affected zone grid a gauge of to be thickness be t1; b
t, d
tthe sheet material simulated heat-affected zone grid b of to be thickness be t2, d gauge, t1, t2 are sheet metal thicknesses; L1 is actual welds is the width dimensions that the sheet material of t1 connects at thickness; L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness; (2) element thickness in nugget region is: c
t=t2+L2, wherein, c
tthe thickness of to be thickness the be simulation nugget district grid c of t2 sheet material; T2 is sheet metal thickness; L2 is actual welds is the width that the sheet material of t2 connects at thickness.
Solder design analogy method based on finite element analysis disclosed in this invention has the following advantages: owing to avoiding the impact of mesh distortion on emulation, consider heat-affected zone and the nugget region of seam weldering simultaneously, therefore the simulation degree of accuracy of finite element model can be improved significantly.
Accompanying drawing explanation
By reference to the accompanying drawings, technical characteristic of the present invention and advantage will be understood better by those skilled in the art, wherein:
Fig. 1 is according to an embodiment of the invention based on the process flow diagram of the solder design analogy method of finite element analysis;
Fig. 2 is according to an embodiment of the invention based on the first schematic diagram realizing example of the solder design analogy method of finite element analysis;
Fig. 3 is according to an embodiment of the invention based on the second schematic diagram realizing example of the solder design analogy method of finite element analysis.
Embodiment
Fig. 1 is according to an embodiment of the invention based on the process flow diagram of the solder design analogy method of finite element analysis.As shown in Figure 1, the solder design analogy method based on finite element analysis disclosed in this invention comprises the following steps: that (A1) determines the size of actual weld seam and determine size and the thickness of the heat-affected zone of described weld seam and the grid in nugget region according to the size of the weld seam of reality; (A2) based on the size of the grid in the determined heat-affected zone for described weld seam and nugget region and thickness, finite element modeling is carried out to described weld seam.
Preferably, disclosed in this invention based in the solder design analogy method of finite element analysis, described step (A2) comprises further: the first row cell formation of contiguous described weld seam is become heat-affected zone domain model according to the grid in the determined heat-affected zone for described weld seam by (B1); (B2) according to the grid in the determined nugget region for described weld seam, the cell formation of position while welding and clinch office is become nugget regional model.
Preferably, disclosed in this invention based in the solder design analogy method of finite element analysis, described step (B1) comprises further: according to the size cutting heat-affected zone geometric model of the grid in the determined heat-affected zone for described weld seam.
Preferably, disclosed in this invention based in the solder design analogy method of finite element analysis, described step (B2) comprises further: according to the size cutting nugget region geometry model of the grid in the determined nugget region for described weld seam.
Preferably, disclosed in this invention based in the solder design analogy method of finite element analysis, described step (A2) comprises further: in the inward flange geometry of extraction welded seam area (comprising heat affecting geometric areas and nugget geometric areas), face is with grid division; Adjustment and optimize the inward flange grid that divides, thus the grid node in described heat-affected zone and described nugget region can one_to_one corresponding; Be that material properties is given in described heat-affected zone and described nugget region according to designing requirement, and give described heat-affected zone and described nugget region respectively by the gauge of the grid in the determined heat-affected zone for described weld seam and nugget region.
Preferably, disclosed in this invention based in the solder design analogy method of finite element analysis, described step (A2) comprises further: be connected, the grid node of described heat-affected zone with the correspondence in described nugget region to simulate the solder design between two parts one by one with two-dimentional shell unit.
Preferably, the solder design analogy method based on finite element analysis disclosed in this invention comprises further: by the solder design models applying based on finite element set up by step (A1)-(A2) in Integral automobile structure of finite element analysis model (such as by mode that node merges).
Preferably, disclosed in this invention based in the solder design analogy method of finite element analysis, the size based on the heat-affected zone of weld seam as described in determining as under type and the grid in nugget region: the unit size in (1) heat-affected zone is: a
l=L2, b
l=L2, d
l=L2, wherein, a
lthe sheet material simulated heat-affected zone grid a length dimension of to be thickness be t1; b
l, d
lthe sheet material simulated heat-affected zone grid b of to be thickness be t2, d length dimension, L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness; 2) unit size in nugget region is: c
l=L2/2, wherein, c
lthe length dimension of to be thickness the be simulation nugget district grid of t2 sheet material, L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness.
Preferably, disclosed in this invention based in the solder design analogy method of finite element analysis, the thickness based on the heat-affected zone of weld seam as described in determining as under type and the grid in nugget region: the element thickness in (1) heat-affected zone is: a
t=t1+ (L1/2), b
t=t2+ (L2/2), d
t=t2+ (L1/2), wherein, a
tthe sheet material simulated heat-affected zone grid a gauge of to be thickness be t1; b
t, d
tthe sheet material simulated heat-affected zone grid b of to be thickness be t2, d gauge, t1, t2 are sheet metal thicknesses; L1 is actual welds is the width dimensions that the sheet material of t1 connects at thickness; L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness; (2) element thickness in nugget region is: c
t=t2+L2, wherein, c
tthe thickness of to be thickness the be simulation nugget district grid c of t2 sheet material; T2 is sheet metal thickness; L2 is actual welds is the width that the sheet material of t2 connects at thickness.
Fig. 2 is that wherein, realize in example described first, the type of seam weldering is Lap type according to an embodiment of the invention based on the first schematic diagram realizing example of the solder design analogy method of finite element analysis.Fig. 3 is that wherein, realize in example described second, the type of seam weldering is T-shaped according to an embodiment of the invention based on the second schematic diagram realizing example of the solder design analogy method of finite element analysis.
Therefore, solder design analogy method based on finite element analysis disclosed in this invention has following advantages: owing to avoiding the impact of mesh distortion on emulation, consider heat-affected zone and the nugget region of seam weldering simultaneously, therefore the simulation degree of accuracy of finite element model can be improved significantly
Although the present invention is described by above-mentioned preferred implementation, its way of realization is not limited to above-mentioned embodiment.Should be realized that: when not departing from purport of the present invention and scope, those skilled in the art can make different changes and amendment to the present invention.
Claims (9)
1., based on a solder design analogy method for finite element analysis, described method comprises the following steps:
(A1) determine the size of actual weld seam and determine size and the thickness of the heat-affected zone of described weld seam and the grid in nugget region according to the size of the weld seam of reality;
(A2) based on the size of the grid in the determined heat-affected zone for described weld seam and nugget region and thickness, finite element modeling is carried out to described weld seam.
2. the solder design analogy method based on finite element analysis according to claim 1, is characterized in that, described step (A2) comprises further:
(B1) according to the grid in the determined heat-affected zone for described weld seam, the first row cell formation of contiguous described weld seam is become heat-affected zone domain model;
(B2) according to the grid in the determined nugget region for described weld seam, the cell formation of position while welding and clinch office is become nugget regional model.
3. the solder design analogy method based on finite element analysis according to claim 2, it is characterized in that, described step (B1) comprises further: according to the size cutting heat-affected zone geometric model of the grid in the determined heat-affected zone for described weld seam.
4. the solder design analogy method based on finite element analysis according to claim 3, is characterized in that, described step (B2) comprises further: according to the size cutting nugget region geometry model of the grid in the determined nugget region for described weld seam.
5. the solder design analogy method based on finite element analysis according to claim 4, is characterized in that, described step (A2) comprises further: in the inward flange geometry of extraction welded seam area, face is with grid division; Adjustment and optimize the inward flange grid that divides, thus the grid node in described heat-affected zone and described nugget region can one_to_one corresponding; Be that material properties is given in described heat-affected zone and described nugget region according to designing requirement, and give described heat-affected zone and described nugget region respectively by the gauge of the grid in the determined heat-affected zone for described weld seam and nugget region.
6. the solder design analogy method based on finite element analysis according to claim 5, it is characterized in that, described step (A2) comprises further: be connected, the grid node of described heat-affected zone with the correspondence in described nugget region to simulate the solder design between two parts one by one with two-dimentional shell unit.
7. the solder design analogy method based on finite element analysis according to claim 6, it is characterized in that, described method comprises further: the solder design models applying based on finite element will set up by step (A1)-(A2) is in Integral automobile structure of finite element analysis model.
8. the solder design analogy method based on finite element analysis according to claim 7, it is characterized in that, the size based on the heat-affected zone of weld seam as described in determining as under type and the grid in nugget region: the unit size in (1) heat-affected zone is: a
l=L2, b
l=L2, d
l=L2 wherein, a
lthe sheet material simulated heat-affected zone grid a length dimension of to be thickness be t1; b
l, d
lthe sheet material simulated heat-affected zone grid b of to be thickness be t2, d length dimension, L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness; (2) unit size in nugget region is: c
l=L2/2 wherein, c
lthe length dimension of to be thickness the be simulation nugget district grid of t2 sheet material, L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness.
9. the solder design analogy method based on finite element analysis according to claim 8, it is characterized in that, the thickness based on the heat-affected zone of weld seam as described in determining as under type and the grid in nugget region: 1) element thickness in heat-affected zone is: a
t=t1+ (L1/2), b
t=t2+ (L2/2), d
t=t2+ (L1/2), wherein, a
tthe sheet material simulated heat-affected zone grid a gauge of to be thickness be t1; b
t, d
tthe sheet material simulated heat-affected zone grid b of to be thickness be t2, d gauge, t1, t2 are sheet metal thicknesses; L1 is actual welds is the width dimensions that the sheet material of t1 connects at thickness; L2 is actual welds is the width dimensions that the sheet material of t2 connects at thickness; (2) element thickness in nugget region is: c
t=t2+L2, wherein, c
tthe thickness of to be thickness the be simulation nugget district grid c of t2 sheet material; T2 is sheet metal thickness; L2 is actual welds is the width that the sheet material of t2 connects at thickness.
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Cited By (6)
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| CN105912805A (en) * | 2016-04-28 | 2016-08-31 | 北京汽车研究总院有限公司 | Modeling method and device of finite element model of metal plate welding line |
| CN106294958A (en) * | 2016-08-03 | 2017-01-04 | 奇瑞汽车股份有限公司 | The method and apparatus creating weld seam |
| CN107378199A (en) * | 2017-09-01 | 2017-11-24 | 苏州热工研究院有限公司 | A kind of method for adjusting the distribution of welded thin-wall box component physical dimension |
| CN109522610A (en) * | 2018-10-25 | 2019-03-26 | 南京航空航天大学 | A kind of weld metal zone mixing crystalline region finite element modeling method |
| CN111914439A (en) * | 2019-06-04 | 2020-11-10 | 中车大同电力机车有限公司 | Modeling method and device of finite element model, storage medium and electronic equipment |
| CN111967177A (en) * | 2020-09-01 | 2020-11-20 | 中车大同电力机车有限公司 | Method for modeling finite element model of welding seam of welded steel structure |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105912805A (en) * | 2016-04-28 | 2016-08-31 | 北京汽车研究总院有限公司 | Modeling method and device of finite element model of metal plate welding line |
| CN105912805B (en) * | 2016-04-28 | 2019-10-18 | 北京汽车研究总院有限公司 | A kind of modeling method and device of metal plate weld seam finite element model |
| CN106294958A (en) * | 2016-08-03 | 2017-01-04 | 奇瑞汽车股份有限公司 | The method and apparatus creating weld seam |
| CN106294958B (en) * | 2016-08-03 | 2019-12-03 | 奇瑞汽车股份有限公司 | The method and apparatus for creating weld seam |
| CN107378199A (en) * | 2017-09-01 | 2017-11-24 | 苏州热工研究院有限公司 | A kind of method for adjusting the distribution of welded thin-wall box component physical dimension |
| CN107378199B (en) * | 2017-09-01 | 2019-04-23 | 苏州热工研究院有限公司 | A method of adjustment welded thin-wall box component geometric dimension distribution |
| CN109522610A (en) * | 2018-10-25 | 2019-03-26 | 南京航空航天大学 | A kind of weld metal zone mixing crystalline region finite element modeling method |
| CN111914439A (en) * | 2019-06-04 | 2020-11-10 | 中车大同电力机车有限公司 | Modeling method and device of finite element model, storage medium and electronic equipment |
| CN111967177A (en) * | 2020-09-01 | 2020-11-20 | 中车大同电力机车有限公司 | Method for modeling finite element model of welding seam of welded steel structure |
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