CN104850702B - A kind of mapping method that punch forming information is introduced to collision simulation model - Google Patents
A kind of mapping method that punch forming information is introduced to collision simulation model Download PDFInfo
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- CN104850702B CN104850702B CN201510260301.2A CN201510260301A CN104850702B CN 104850702 B CN104850702 B CN 104850702B CN 201510260301 A CN201510260301 A CN 201510260301A CN 104850702 B CN104850702 B CN 104850702B
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Abstract
The invention provides a kind of mapping method that punch forming information is introduced to collision simulation model, belong to Simulation Application field.It solves the problems, such as that punch forming information MAP has punching press information offset distortion into collision simulation model process in the prior art.This method comprises the following steps：A, the shape and feature of the auto parts of punch forming information are mapped according to needed for collision simulation, chooses some reference points；B, quadrangular mesh partition is carried out to above-mentioned auto parts, reads the node number of the quadrilateral mesh node corresponding to reference point；C, punch forming emulation is carried out to above-mentioned auto parts, each reference point is on the node of triangular mesh；D, the node number for completing the triangular mesh node after punch forming emulates corresponding to reference point is read；E, one-to-one corresponding mapping is carried out according to same reference points difference grid node number.This method can be by punch forming information completely, be effectively mapped in complete automobile collision simulation model.
Description
Technical field
The invention belongs to Simulation Application technical field, is related to a kind of reflecting to collision simulation model introducing punch forming information
Shooting method.
Background technology
FEM model employed in collision simulation model is established, each automobile zero according to ideal structure geometrical model
Sectional dimension, thickness of slab distribution and the material property of part are design load, do not account for the manufacturing process such as punching press and welding to part
The influence that set size and material property are brought, therefore often punch forming emulation is incorporated into collision simulation at present, so as to carry
High collision simulation model emulation precision and accuracy.
Currently used punch forming simulation result requires to establish part first into the mapping process of collision simulation model
Coordinate system is reference point, and the selection of reference point is typically before punch forming emulation and collision simulation model modeling.Due to part
Coordinate system is related to that punch forming emulates the result mapped to collision simulation model, therefore punch forming emulation and collision simulation mould
The uniformity of key position mesh generation residing for these local coordinate systems in type, the accuracy of local coordinate system is all to collision simulation
Computational accuracy important.Punch forming emulation is general use Autoform softwares, Autoform softwares with more into
Ripe punch forming copying, Autoform softwares have become one that sheet stamping forming simulation field is most widely used
Money software.Collision simulation typically uses hypermesh softwares, hypermesh softwares to locate before mainly being carried out to collision simulation model
Reason and post processing.Mapping of the punch forming artificial intelligence to collision model can be realized using primer softwares.Hypermesh is soft
Part and primer softwares are the software of altair companies research and development.
But punch forming simulation software Autoform punching press calculating in using adaptive meshing algorithm, its three
Hexagonal lattice node can not be corresponding with the grid node of quadrangle in collision simulation software hypermesh, so may
So that the reference point chosen is in the node of grid in collision simulation, and the section of grid is not in punch forming emulation
Point.Because punch forming simulation result maps to collision simulation model mapped according to the grid node of reference point, so
Allow for punch forming simulation software by reality punch forming information MAP into collision simulation model process generally existing
Situations such as distortion of punching press information offset, imperfect shaping information mapping.
The content of the invention
The present invention is directed to the problem of existing, it is proposed that a kind of mapping side that punch forming information is introduced to collision simulation model
How method, the technical problem that this method solves are by punch forming information completely, be effectively mapped to complete automobile collision simulation model
In.
The present invention is realized by following technical proposal：A kind of mapping that punch forming information is introduced to collision simulation model
Method, it is characterised in that this method comprises the following steps：
A, the shape and feature of the auto parts of punch forming information are mapped according to needed for collision simulation, if choosing trepang
Examination point；
B, quadrangular mesh partition is carried out to above-mentioned auto parts, if after reading above-mentioned auto parts quadrangular mesh partition
The node number of quadrilateral mesh node corresponding to trepang examination point；
C, punch forming emulation is carried out to above-mentioned auto parts, and completes preliminary triangular grids, to each ginseng
Position residing for examination point re-starts deburring, then after carrying out triangular grids to above-mentioned auto parts, makes each reference point
On node in triangular mesh；
D, the node number for completing the triangular mesh node after punch forming emulates corresponding to above-mentioned reference point is read；
E, one-to-one corresponding mapping is carried out according to same reference points difference grid node number, by punch forming information MAP to touching
Hit on the above-mentioned auto parts in emulation.
The auto parts for needing to carry out collision simulation are chosen, according to the shape of the auto parts and some references of Feature Selection
Point.Three-dimensional modeling is carried out to the auto parts, completes sectional dimension, thickness of slab distribution and the material of the auto parts after three-dimensional modeling
Performance is design load, does not have punch forming information.Quadrangular mesh partition is carried out to the auto parts of three-dimensional simulation, finds out ginseng
Quadrilateral mesh node number residing for examination point, prepared for mapping punch forming information.The auto parts are subjected to punch forming
Emulation causes the auto parts to carry punching press information, now finds out the location of reference point, and deburring again is carried out to the position,
Ensure reference point on the node in grid, reading the reference point three afterwards after above-mentioned auto parts triangular grids
Hexagonal lattice node number.Node number is coordinate.Determine that the node number of reference point just can determine that the coordinate of reference point, according to reference point
Coordinate can just draw the coordinate of each point of auto parts, therefore only need to be using the node number of reference point as benchmark when mapping, general
The node number of reference point triangular mesh is mapped to the reference point quadrilateral mesh node number, just can be right in collision simulation
The auto parts introduce punch forming information.According to the triangular mesh node after reference point punch forming information during due to mapping
Number and the node number of the reference point quadrilateral mesh position residing for reference point is repaiied again as reference data, this method
While repartition triangular mesh, it can be ensured that reference point is on triangular mesh node, therefore the reference point three read out
Hexagonal lattice node number is accurate node number, so as to which punch forming information completely, the effective complete automobile collision that is mapped to be emulated
In model.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, in the step A, above-mentioned
Reference point is chosen on the different outer surfaces of auto parts.Reference point, can be with the different outer surfaces of the auto parts model of foundation
Make that the auto parts model is all had into mapping reference in different faces in mapping process, effectively by punch forming information
Completely it is mapped in the auto parts.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, being chosen at for reference point is above-mentioned
On the seamed edge of auto parts.Reference point is chosen on the auto parts seamed edge, can quickly obtain the grid node of reference point
Number.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, being chosen at for reference point is above-mentioned
At the end points of the seamed edge of auto parts.The searching being convenient for reference a little is so selected, improves the time for obtaining reference point node number.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, the reference point of the selection
Number is 3.Three-dimensional auto parts, choose the effect that three reference point cans accurately ensure punch forming mapping process.
It is introduced into the mapping method of punch forming information to collision simulation model above-mentioned, in the step C, will refers to
The position amplification of above-mentioned auto parts residing for point, choose the adjacent closest approach of reference point and formed to stretching outside above-mentioned auto parts
The border of one projection, the closest approach are located on above-mentioned auto parts.The adjacent closest approach of reference point is chosen to above-mentioned automobile zero
Stretching forms the border of a projection outside part, first, can be easy to be quickly found out reference point and obtain node number, because projection
Border is easier to look for than point, plays a part of a mark, second, after forming the border of a projection, to the auto parts again
When carrying out triangular grids, the reference point can also ensure that mapping process interior joint number is true at the node of grid
Reflect the position of reference point, be mapped to so that punch forming information is accurate and effective in collision simulation model.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, the reference point is adjacent most
In near point drawing process, the position of reference point is not changed.Change the position of reference point, can make it that mapping is inaccurate.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, by adjacent nearest of reference point
Pressing direction of the point perpendicular to above-mentioned auto parts position residing for reference point stretches.The adjacent closest approach of reference point is along above-mentioned direction
Stretching, does not produce destruction, and do not allow the position of malleable reference point to the information after the auto parts punch forming.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, the reference point is adjacent recently
The distance range of point stretching is determined by the width of above-mentioned auto parts.Stretching distance size is determined by the width of above-mentioned auto parts
Fixed, span is generally 1st/10 to ten/20ths of auto parts width.
It is introduced into above-mentioned to collision simulation model in the mapping method of punch forming information, in the step B, selection
Reference point in quadrilateral mesh node, does not re-start the selection of reference point.The reference point of selection is in the side of collision simulation four
On grid node in shape mesh generation, the quadrilateral mesh node number of the reference point could be truly reflected in mapping process,
Prevent the introducing distortion of the punching press information in mapping process.
Compared with prior art, this method has advantages below：
1st, present invention ensure that reference point also can be on grid node after punch forming emulation, therefore the reference point read out
Triangular mesh node number is accurate node number, so as to by punch forming information completely, effective be mapped to complete automobile collision and imitate
In true mode.
2nd, present invention selection reference point nearest-neighbor can to one raised border of stretching formation outside above-mentioned part
It is easy to be quickly found out reference point and obtains node number.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the present invention；
Fig. 2 is the three-dimensional modeling structural representation of front longitudinal in the embodiment of the present invention；
Fig. 3 is the enlarged diagram at A after quadrangular mesh partition in Fig. 2；
Fig. 4 is the enlarged diagram after trimming line rear triangle mesh generation again at A in Fig. 2；
In figure, 1, front longitudinal；2nd, reference point；
Embodiment
It is the specific embodiment of the present invention below, and with reference to accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
As shown in figure 1, a kind of mapping method that punch forming information is introduced to collision simulation model, this method include following
Step：
A, the shape and feature of the auto parts of punch forming information are mapped according to needed for collision simulation, if choosing trepang
Examination point 2, reference point 2, the rib for being chosen at above-mentioned auto parts of reference point 2 are chosen on the different outer surfaces of above-mentioned auto parts
Bian Shang, at the end points of the seamed edge for being chosen at above-mentioned auto parts of reference point 2,2 numbers of reference point of selection are 3；
B, quadrangular mesh partition is carried out to above-mentioned auto parts, after reading above-mentioned auto parts quadrangular mesh partition,
The node number of quadrilateral mesh node corresponding to some reference points 2, the reference point 2 of selection not in quadrilateral mesh node,
Re-start the selection of reference point 2；
C, punch forming emulation is carried out to above-mentioned auto parts, and completes preliminary triangular grids, to each ginseng
Position residing for examination point 2 re-starts deburring, then after carrying out triangular grids to above-mentioned auto parts, makes each reference point
On 2 nodes in triangular mesh, deburring process is to amplify the position of above-mentioned auto parts residing for reference point 2, chooses ginseng
The nearest-neighbor of examination point 2 forms a raised border to stretching outside above-mentioned part, and the closest approach is located at above-mentioned auto parts
On, in the nearest-neighbor drawing process of reference point 2 is carried out, do not change the position of reference point 2, the nearest-neighbor of reference point 2 hangs down
Directly the pressing direction in above-mentioned auto parts position residing for reference point 2 stretches, the distance range of the nearest-neighbor of reference point 2 stretching
Determined by the width of above-mentioned auto parts.
D, the node number for completing the triangular mesh node after punch forming emulates corresponding to above-mentioned reference point 2 is read；
E, one-to-one corresponding mapping is carried out according to 2 different grid nodes number of same reference points, punch forming information MAP is arrived
On above-mentioned auto parts in collision simulation.
Below by way of using the front longitudinal 1 of automobile as collision simulation model, to workflow further instruction of the present invention：
As in Figure 2-4, three reference points 2 are chosen according to the shape of the strip of front longitudinal 1, three reference points 2 are located respectively
In on the different outer surface of front longitudinal 1, three reference points 2 are located on the end on the seamed edge of front longitudinal 1 respectively, three reference points
2 are not at a seamed edge.Represent the position that three reference points 2 are chosen in Fig. 2 at A, at B and at C respectively.
Simulated by three-dimensional software and build front longitudinal 1, the sectional dimension of the front longitudinal 1, thickness of slab point after completion three-dimensional modeling
Cloth and material property are design load, do not have punch forming information.In order to which punch forming information is incorporated on the front longitudinal 1,
The front longitudinal 1 is imported into collision simulation software hypermesh after will first three-dimensional modeling being completed, collision simulation software
The node numbers that is divided into quadrangular mesh partition and is only able to display grid of the hypermesh to the front longitudinal 1.Due to punch forming
Information needs according to the node number of reference point 2 be mapped on front longitudinal 1, therefore in order to ensure quadrilateral mesh node number energy
The position of enough actual response reference points 2, so when reference point 2 is not in quadrilateral mesh node, need to reselect reference point 2.
By collision simulation software hypermesh find out three reference points 2 respectively corresponding to quadrilateral mesh node, go forward side by side
Row is recorded as mapping and prepared.After finding out the quadrilateral mesh node number of reference point 2, by the model of front longitudinal 1 with K file formats
Export, and the model of front longitudinal 1 of K file formats is imported into punch forming simulation software Autoform.
Punch forming simulation software Autoform carries out punch forming emulation to the front longitudinal 1, after completing this operation, before this
Longeron 1 just carries punch forming information, and punch forming information includes thickness and material property.Punch forming simulation software
Autoform completes the stamping forming meeting of front longitudinal 1 and be carried out three automatically using adaptive triangular grids
Hexagonal lattice divides.It now cannot ensure that reference point 2 is also on the node of triangular mesh, if reference point 2 is not located at three
On hexagonal lattice node, that can have a strong impact on the result of mapping.
Therefore in order that reference point 2 is ensured on grid node, the position of front longitudinal 1 residing for reference point 2 is amplified, due to
Just it take into account at the end points of the seamed edge for being chosen at front longitudinal 1 of reference point 2 when choosing the position of reference point 2, therefore can
To find the position of front longitudinal 1 residing for reference point 2 faster.After the position amplification of front longitudinal 1 residing for reference point 2, it can be seen that
The nearest-neighbor at position residing for reference point 2, by the outside of closest approach front side rails 1 and perpendicular to girder steel portion residing for reference point 2
The pressing direction stretching (the girder steel position as residing for reference point 2 is vertical punching press up and down, then draw direction is horizontal direction) of position, leads to
Destruction can not be produced to the information after the punch forming of front longitudinal 1 by crossing above-mentioned stretching, and not allow the position of malleable reference point 2
Put.
Cause the side of reference point 2 to form the border of a projection after the nearest-neighbor of reference point 2 stretching of selection, carrying out
In the nearest-neighbor drawing process of reference point 2, the position of reference point 2 is not changed.After completing stretching, emulated by punch forming soft
Part Autoform is rerun, again deburring line procedures, and the border after stretching is also added in front longitudinal 1, so as to punching press
Forming simulation software Autoform again to the 1 adaptive triangular grids of front longitudinal after, because the border is just in reference point 2
Side, and reference point 2 is the bottom end points on the border, therefore after dividing the reference point 2 is at triangular mesh node.
The distance range of the nearest-neighbor of reference point 2 stretching is determined by the width of above-mentioned auto parts.Span one
As be auto parts width 1/10 to ten/20ths.
Front longitudinal 1 with punch forming information is exported with K file formats from punch forming simulation software Autoform,
And imported into collision simulation software hypermesh, by the border of projection, the position of reference point 2 just can be quickly found out, and read
Take out triangular mesh node number.Now, so that it may know the quadrilateral mesh node number before 2 non-punch forming of reference point and punching press
Triangular mesh node number after shaping.
Mapped by the mapping block in mapping software primer, one will be carried out with a 2 different node number of reference point
One correspondence mappings, mapping direction are that the triangular mesh node number of reference point 2 maps to quadrilateral mesh node number.Detailed process
For：The file of punch forming front longitudinal 1 and the non-file of punch forming front longitudinal 1 are put into mapping software primer, selection is reflected
Penetrate module and send three nodes and carry out mapping directive, the triangular mesh node number of reference point 2 and the quadrilateral mesh of the point
Node number is respectively filled in mapping block, carries out one-to-one corresponding mapping, so as to by punch forming information MAP to network of quadrilaterals
In front longitudinal 1 under lattice division.
This method in collision simulation model by choosing the ginseng reacted the aspect of model and be at model seamed edge end points
Examination point 2, and the quadrilateral mesh node for taking the position of actual response reference point 2 accurately is looked for, and reference is made by trimming line again
Point 2 is in stamping simulation on triangular mesh node, according to the triangular mesh node of actual response reference point 2 and quadrangle
Grid node carries out one-to-one corresponding mapping, so as to form the scheme of an entirety to solve the technical problem of this method, so that will
Punch forming information completely, effectively it is mapped in complete automobile collision simulation model, while by forming prominent border, it is quick complete
Into the mapping of punching press information.
Specific embodiment described herein is only to present invention explanation for example.The technical field of the invention
Technical staff can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but
Without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more having used the terms such as front longitudinal 1, reference point 2 herein, be not precluded from using other terms can
Can property.It is used for the purpose of more easily describing and explaining the essence of the present invention using these terms；It is construed as any one
The additional limitation of kind is all disagreed with spirit of the present invention.
Claims (10)
1. a kind of mapping method that punch forming information is introduced to collision simulation model, it is characterised in that this method includes following
Step：
A, the shape and feature of the auto parts of punch forming information are mapped according to needed for collision simulation, chooses some reference points
(2)；
B, quadrangular mesh partition is carried out to above-mentioned auto parts, if reading trepang after above-mentioned auto parts quadrangular mesh partition
The node number of quadrilateral mesh node corresponding to examination point (2)；
C, punch forming emulation is carried out to above-mentioned auto parts, and completes preliminary triangular grids, to each reference point
(2) position residing for re-starts deburring, then after carrying out triangular grids to above-mentioned auto parts, makes each reference point
(2) on the node in triangular mesh；
D, the node number for completing the triangular mesh node after punch forming emulates corresponding to above-mentioned reference point (2) is read；
E, one-to-one corresponding mapping is carried out according to the different grid nodes number of same reference points (2), by punch forming information MAP to touching
Hit on the above-mentioned auto parts in emulation.
2. the mapping method according to claim 1 that punch forming information is introduced to collision simulation model, it is characterised in that
In the step A, reference point (2) is chosen on the different outer surfaces of above-mentioned auto parts.
3. the mapping method according to claim 2 that punch forming information is introduced to collision simulation model, it is characterised in that
Reference point (2) is chosen on the seamed edge of above-mentioned auto parts.
4. the mapping method according to claim 3 that punch forming information is introduced to collision simulation model, it is characterised in that
At the end points of the seamed edge for being chosen at above-mentioned auto parts of reference point (2).
5. the mapping method according to claim 4 that punch forming information is introduced to collision simulation model, it is characterised in that
Reference point (2) number of the selection is 3.
6. the mapping method that punch forming information is introduced to collision simulation model according to claim 1 or 2 or 3 or 4, its
It is characterised by, in the step C, the position of above-mentioned auto parts residing for reference point (2) is amplified, it is adjacent to choose reference point (2)
Closest approach form a raised border to stretching outside above-mentioned auto parts, the closest approach is located on above-mentioned auto parts.
7. the mapping method according to claim 6 that punch forming information is introduced to collision simulation model, it is characterised in that
In the adjacent closest approach drawing process of the reference point (2), the position of reference point (2) is not changed.
8. the mapping method according to claim 7 that punch forming information is introduced to collision simulation model, it is characterised in that
Pressing direction of the adjacent closest approach of reference point (2) perpendicular to above-mentioned auto parts position residing for reference point (2) is stretched.
9. the mapping method according to claim 8 that punch forming information is introduced to collision simulation model, it is characterised in that
The distance range of the adjacent closest approach stretching of the reference point (2) is determined by the width of above-mentioned auto parts.
10. the mapping method according to claim 9 that punch forming information is introduced to collision simulation model, its feature exist
In in the step B, the reference point (2) of selection re-starts the selection of reference point (2) not in quadrilateral mesh node.
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| CN1073402A (en) * | 1991-11-06 | 1993-06-23 | 肯塞特分析公司 | The elastic energy absorption plant that is used for vehicle bumper |
| CN102306396A (en) * | 2011-09-15 | 2012-01-04 | 山东大学 | Three-dimensional entity model surface finite element mesh automatic generation method |
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