CN112163363A - Finite element model design method for collision honeycomb barrier bonding colloid - Google Patents
Finite element model design method for collision honeycomb barrier bonding colloid Download PDFInfo
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Abstract
The invention discloses a finite element model design method for a bonding colloid of a collision honeycomb barrier, which comprises the steps of cutting openings among six surfaces of a hexagonal shell unit and a hexagonal shell unit, and bending the six surfaces inwards by ninety degrees to form a flange surface. And generating six cubic units on the shell unit of each flange surface by a parallel stretching method, wherein one surface of the cubic units is connected with the shell unit on the flange surface through the same node, and the node on the other surface of the cube parallel to the surface is connected to the front cover plate of the barrier model through a mathematical coupling algorithm. The energy-absorbing cellular barrier is bonded on the cover plate and the middle partition plate through the special bonding glue model to form three integrated monolithic barriers, the integrated cellular barrier modules are installed on the fixed installation plate, and the barrier is integrally fixed on a collision rigid trolley or a rigid wall body through the installation plate.
Description
Technical Field
The invention relates to the technical field of finite element algorithm simulation modeling, in particular to a method for designing a finite element model of collision honeycomb barrier bonding glue.
Background
In the global automobile industry, with the continuous improvement of the requirement on the safety performance of automobiles, automobile enterprises need to use a large amount of finite element calculation to carry out virtual collision simulation in order to save the cost of real automobile collision in the automobile research and development process aiming at the safety requirement of automobile model development and the requirements of different national regulations. In the virtual simulation process of front collision, side collision and rear-end collision of the automobile, different barrier simulations are used according to different regulatory requirements, and the boundary condition of the virtual simulation is completely consistent with the whole automobile collision setting in an actual collision laboratory.
In order to enable consistency of a CAE simulation calculation result and an actual collision result to be higher and simulation accuracy to be better, a high-accuracy finite element collision barrier must be designed, so that the barrier of virtual simulation and the barrier of the actual collision process have higher consistency, and the barrier can better guide development work of a vehicle type in virtual CAE calculation.
The early finite element barrier models are mostly simulated by Solid body units, such as the early finite element barrier models of the german GNS company and the uk Arup company, the Solid body units are basically adopted to simulate the mechanical properties of the honeycomb aluminum, because the computing power of a computer is limited two decades ago, and the actual properties of the honeycomb aluminum must be simulated by certain simplification in the development process of the models. With the rapid development of computer speed, there is a tendency to use shell elements to simulate actual aluminum honeycomb, which not only more closely resemble actual aluminum honeycomb in appearance, but also avoid some of the inherent drawbacks of body elements on simulated aluminum honeycomb. In actual deformation of the honeycomb aluminum, the structures of the honeycomb aluminum in three-dimensional different directions are completely different, the body unit is isotropic in geometric structure, the simulation precision of the shearing force in simulation is not enough, and the characteristic of being harder than the actual characteristic is shown in many times, and the precision is difficult to meet the requirements of design and development at present.
In recent years, with the increasing speed of computers, engineers are provided with the possibility of developing collision finite element barriers by using large-scale shell elements, such as shell element barriers of the german GNS company and the Arup company in england, and the shell element simulation method is adopted, so that the precision is further improved compared with the prior body element barrier model.
One of the most critical techniques in the development of a shell element barrier is how to simulate the adhesive in a physical barrier. With the continuous promotion of the safety standard of automobiles, the requirements on the honeycomb barrier in the development of the collision safety of the whole automobile are not only limited to meeting the rigidity requirement of the barrier, but also require the tearing performance on the cover plate of the collision surface of the barrier. However, the tear properties of the cover sheet are largely limited by the strength properties of the adhesive gel between the cover sheet and the honeycomb aluminum. Meanwhile, in a physical honeycomb aluminum barrier, the hexagonal cavities are bonded together through the colloid, so that how to more accurately simulate the performance of the colloid becomes a technical difficulty in designing a honeycomb aluminum finite element model.
At present, there are two main development paths for the model design method of the adhesive glue on the global scale. One is to the colloid between the hexagonal honeycomb cavity, and current technique is gone on through the mode of simplifying, does not design the model of colloid alone, ignores the special construction that bonds gluey, and the inefficacy criterion of unit comes the tearing characteristic of the inefficacy of simulation colloid and honeycomb through the adjacent bonding edge of design honeycomb cavity. The disadvantage of this method is that it does not simulate very accurately the tearing and failure characteristics of the gel bond sites inside the honeycomb cavities. And the other is that a rod unit is adopted to simplify and replace the mode, the rod unit is used for connecting the unit between the port of the honeycomb block and the cover plate, and the tearing and failure modes of the colloid are simulated by setting the strength and the failure characteristics of the rod unit. Aiming at the condition that the tearing characteristics of the cover plate are not required to be inspected by early regulation standards, the method can better simulate the rigidity and deformation of the barrier in the collision process. However, with the increasing requirements of global collision laws and regulations, such as the chinese edition C-NCAP 2021 standard, for the MPDB working condition of two-vehicle collision, the finite element barrier simulated by collision not only needs to examine the rigidity and deformation of the barrier during collision, but also needs to consider how the cover plate bonded to the honeycomb cavity at the front end of the barrier deforms and tears. The existing barrier model modeling method cannot accurately simulate the problem, and higher requirements are put on the development of the collision safety barrier.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a method for establishing a collision safety barrier finite element model by a new modeling connection method on the basis of ensuring the calculation precision and the calculation efficiency, wherein the establishment method of the model is different from the existing modeling methods of all barrier models, and the modeling method can not only improve the calculation precision of a bonding glue model, but also better simulate the tearing effect inside a physical barrier in the actual collision test. The barrier model built by the method can be suitable for the latest and stricter regulation standards of different countries in the automobile safety collision, and the development efficiency of the whole automobile can be improved.
In order to achieve the purpose, the technical scheme of the invention provides a finite element model design method for a bonding colloid of a collision honeycomb barrier, which comprises the following design steps:
firstly, taking a tubular shell honeycomb aluminum single cavity with a hexagonal cross section by using a computer program, cutting six faces of the hexagonal tubular shell honeycomb aluminum single cavity at a honeycomb aluminum single cavity port, and taking out one surface of the six surfaces of the honeycomb aluminum single cavity, wherein the surfaces are not connected with each other;
secondly, cutting off top end angles on two sides of two ends of the surfaces which are not connected in the first step, cutting off the length and width of each top end angle to be 0.05-0.7 of the length of a hexagon side, enabling the two ends of the surfaces which are not connected to each other to be provided with convex edges, then re-splicing the six ends which are provided with convex edges and the surfaces which are not connected to each other into a hexagonal tubular shell honeycomb aluminum single cavity, and then bending the convex edges at the two end ports of the hexagonal tubular shell honeycomb aluminum single cavity towards the inner side of the hexagonal tubular shell honeycomb aluminum single cavity for ninety degrees to form flange edges at two ends of the hexagonal tubular shell honeycomb aluminum single cavity;
thirdly, carrying out parallel stretching on flange edges formed at two ends of the honeycomb aluminum single cavity of the hexagonal tubular shell in the second step, generating hexahedral solid units on the hexagon of the flange edges, and simulating the mechanical characteristics of bonding colloid between the honeycomb aluminum cavity and the partition plate in the actual honeycomb aluminum barrier by using the hexahedral solid units;
fourthly, adhering the adhesive colloid to the surface of the flange edge of the hexahedral solid unit in the third step by using a computer program, so that the hexagonal tubular shell honeycomb aluminum single cavity forms the solid unit adhered with the adhesive colloid;
fifthly, connecting the entity units attached with the bonding colloid in the fourth step with the partition board; the partition board is a plane shell unit which is parallel to a flange face formed by 6 flange edges, and a hexahedral solid unit with an adhesive colloid unit attached to the flange face at the end part is connected with the partition board through a mathematical interpolation coupling algorithm;
sixthly, building a honeycomb block by using the single hexagonal tubular shell honeycomb aluminum single cavity in the fourth step through an array replication method, determining the number of the barriers needing array replication according to the length, width and height of the barriers needing to be built, and finally forming a block structure model of the energy-absorbing honeycomb barriers;
seventhly, taking the MPDB barrier as an example, adopting an MPDB standard barrier construction method, repeating the sixth step, and then building a middle block structure model of the energy-absorbing cellular barrier and a rear end block structure model of the energy-absorbing cellular barrier through a computer program, wherein a partition plate is arranged between different module structure models, and different cellular barriers are connected to the partition plate by using the colloid model to form three integrated monolithic barriers;
eighthly, building an outermost cover plate model on the periphery of the whole block of the barrier in the seventh step through a computer program, and wrapping the whole block of the barrier model in the cover plate model;
ninth, setting mechanical parameters of materials in the adhesive colloid model and mathematical control parameters of the whole model through a computer program, and describing deformation and stress states of the colloid unit under the condition of external acting force through the mechanical and mathematical parameters; meanwhile, different classification groups are built in the model, and a template file corresponding to the barrier model block is built for automatic report output of a calculation result;
and tenth, adding a barrier digital model into a simulation model of the whole vehicle in the design of the whole vehicle through a computer program to realize the whole process of collision safety simulation, and enabling computer software to automatically generate a simulation result report through a built template file after the calculation is finished.
In order to truly and effectively simulate vehicle collision and avoid unnecessary loss caused by collision by adopting a physical model, the preferred technical scheme is that the collision honeycomb barrier is a collision aluminum honeycomb barrier.
In order to truly and effectively simulate the stress condition of a bonding part in a collision test after a collision honeycomb barrier and a baffle movable cover plate are bonded through bonding colloid, the preferable technical scheme is that the bonding colloid is set through a computer program and is used for connecting a honeycomb aluminum port and a baffle perpendicular to the port.
In order to simulate the vehicle collision effectively and truly and avoid unnecessary loss caused by the collision of a physical model, the preferable technical proposal is that the radius of the hexagonal inscribed circle or circumscribed circle of the tubular shell unit with the hexagonal cross section is 9 mm-120 mm.
In order to truly and effectively simulate vehicle collision, avoid unnecessary loss caused by adopting physical model collision and be suitable for different standards set by different countries for aluminum honeycomb barrier collision tests, the preferred technical scheme is that the finite element collision barrier model design method is suitable for designing barrier finite element models required by various national regulatory standards, including any one of ODB, PDB, MDB, AEMDB and MPDB.
In order to simulate the vehicle collision effectively and truly and avoid unnecessary loss caused by the collision of a physical model, the preferable technical scheme is that the mechanical and mathematical parameters of the adhesive colloid adopt a parameter method based on a digital model of a biological dummy, and the parameters are used for keeping better precision and stability under the condition of great deformation of the adhesive colloid.
In order to truly simulate the stress conditions of adhesives of different materials, different bonding areas, different bonded adhesives in a collision test and different types of honeycomb aluminum models in a collision, the preferable technical scheme is that the parameters of the materials in the bonded colloid model in the ninth step comprise bonded colloid material parameters, bonded colloid bonding surface connection parameters and bonded colloid bonding thickness parameters, and the mathematical control parameters of the whole model comprise honeycomb aluminum material parameters, honeycomb aluminum wall thickness parameters, honeycomb aluminum inscribed circle or circumscribed circle parameters, honeycomb aluminum density parameters, honeycomb aluminum barrier block thickness parameters, honeycomb aluminum barrier block length and width parameters, and partition plates, cover plate material parameters, partition plates and cover plate thickness parameters.
In order to simulate the vehicle collision effectively and truly and avoid unnecessary loss caused by adopting a physical model collision, the computer program is preferably applied to any one of ESI corporation vps computer software product, LSTC corporation LS-dyna computer software product, Altair radio computer software product, and adaqus computer software product.
In order to simplify the end flange and improve the squareness simulation efficiency, the preferable technical scheme is that the convex edge in the second step is a rectangular convex edge, and the top corner is a rectangular corner.
In order to avoid that the stress distribution of the bonding surface is not uniform enough and the confirmability of a stress analysis structure is influenced due to the concentrated stress of the tip, the preferable technical scheme is that the convex edge in the second step is a rectangular convex edge with a transition arc chamfer, and the top end angle is a rectangular angle with a sheared angle being an arc angle.
The invention has the advantages and beneficial effects that: the method for designing the finite element model of the collision honeycomb barrier bonding glue builds a collision safety barrier finite element model through a new modeling connection method on the basis of ensuring the calculation precision and the calculation efficiency, the building method of the model is different from all existing barrier model modeling methods, and the specific expression is that a colloid model of a honeycomb aluminum hexagonal cavity port connected with a cover plate or a partition plate is different from a colloid model of the existing conventional honeycomb aluminum barrier, the colloid model of the conventional honeycomb aluminum barrier model is simplified in a mode of sharing nodes of honeycomb aluminum shell units or is connected through rod units, the method for designing the finite element model of the collision honeycomb barrier bonding glue comprises the steps of using a hexagonal shell unit with a cross section and cutting openings among six surfaces of the hexagonal shell unit, and then bending the six surfaces inwards by ninety degrees, forming a flange face. And generating six cubic units on the shell unit of each flange surface by a parallel stretching method, wherein one surface of the cubic units is connected with the shell unit on the flange surface through the same node, and the node on the other surface of the cube parallel to the surface is connected to the front cover plate of the barrier model through a mathematical coupling algorithm.
The modeling mode can improve the operation precision of the adhesive model and better simulate the tearing effect inside the physical barrier in the actual collision test. The barrier model built by the method can be suitable for the latest and stricter regulation standards of different countries in the automobile safety collision, and the whole automobile development efficiency can be improved.
The invention not only improves the precision and efficiency of automobile safety development, but also solves the new technical problem of the digital barrier caused by the improvement of the standards of the automobile safety regulations at home and abroad. The technical problem of colloid simulation precision in the new regulation standard is well solved, the tearing characteristic of the barrier cover plate is more accurately simulated, and the requirement of the new regulation is better met.
Drawings
FIG. 1 is a schematic perspective view of a hexagonal tubular housing element in a finite element model design method of an automotive crash honeycomb barrier according to the present invention;
FIG. 1.1 is a perspective view of the structure of FIG. 1 after the top corners of the end portions are cut off;
FIG. 1.2 is a perspective view of one face of the hexagonal tubular housing unit of FIG. 1.1;
fig. 1.3 is a schematic perspective view of the hexagonal tubular housing unit of fig. 1.1 with the flange bent ninety degrees;
fig. 1.4 is a schematic structural view of a projection of the hexagonal tubular housing unit in fig. 1.1 after bending the flange edge by ninety degrees;
fig. 1.5 is a schematic perspective view of the hexagonal tubular housing unit of fig. 1.3 with the flange bent ninety degrees and the adhesive applied to the surface of the flange;
FIG. 1.6 is an enlarged view of a portion of FIG. 1.5;
FIG. 1.7 is a schematic structural view of the adhesive layer in FIG. 1.6;
FIG. 2 is a schematic diagram of a projected structure of a honeycomb energy absorption block in the method for designing a finite element model of the automobile collision honeycomb barrier according to the invention;
FIG. 3 is a schematic perspective view of three honeycomb energy-absorbing blocks at the front, middle and rear parts in the method for designing a finite element model of a car collision honeycomb barrier according to the present invention;
FIG. 4 is a schematic perspective view of an integral barrier model formed by assembling three honeycomb energy-absorbing blocks, namely a front honeycomb energy-absorbing block, a middle honeycomb energy-absorbing block and a rear honeycomb energy-absorbing block, in the method for designing a finite element model of the automobile collision honeycomb barrier;
FIG. 5 is a schematic view of the overall structure of a barrier trolley in the finite element model design method of the automobile collision honeycomb barrier of the present invention.
In the figure: 1. a hexagonal tubular shell honeycomb aluminum single cavity; 1.1, surfaces which are not connected with each other; 1.2, top corner; 1.3, a convex edge; 1.4, flange edge; 2. a partition plate; 3. binding colloid; 4. a front end block body structural model; 5. a middle block structure model; 6. a rear end block structural model; 7. a monolithic barrier; 8. a cover plate model; 9. mounting the plate model; 10. a trolley model; 11. acceleration monitoring points; 12. an air bag model.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 and 1.1 to 1.7, the invention relates to a finite element model design method for a bonding colloid of a collision honeycomb barrier, which comprises the following design steps:
firstly, taking a tubular shell honeycomb aluminum single cavity with a hexagonal cross section by using a computer program, cutting six faces of a hexagonal tubular shell honeycomb aluminum single cavity 1 at a honeycomb aluminum single cavity port, and taking out one non-connected surface 1.1 of the six surfaces of the honeycomb aluminum single cavity;
secondly, cutting off top end angles 1.2 on two sides of two ends of the surface 1.1 which is not connected in the first step, cutting off the length and the width of each top end angle to be 0.05-0.7 of the side length of a hexagon, enabling two ends of the surface 1.1 which is not connected to be provided with convex edges 1.3, splicing the surfaces 1.1 which are not connected to be provided with convex edges 1.3 again to form a hexagonal tubular shell honeycomb aluminum single cavity 1, and bending the convex edges 1.3 at two end ports of the hexagonal tubular shell honeycomb aluminum single cavity 1 to ninety degrees towards the inner side of the hexagonal tubular shell honeycomb aluminum single cavity 1 to form flange edges 1.4 at two ends of the hexagonal tubular shell honeycomb aluminum single cavity 1;
thirdly, performing plane stretching on the flange edges 1.4 at the two ends of the hexagonal tubular shell unit in the second step, generating hexahedral solid units on six edges of the flange edges 1.4, and simulating the mechanical characteristics of bonding colloid between the six honeycomb aluminum cavities 2 and the partition plates in the actual honeycomb aluminum barrier by using the hexahedral solid units;
fourthly, adhering the adhesive colloid 3 to the surface of the flange edge 1.3 in the third step by using a computer program, so that the hexagonal tubular shell honeycomb aluminum single cavity 1 forms an entity unit adhered with the adhesive colloid 3;
fifthly, connecting the entity unit attached with the adhesive colloid 3 in the fourth step with the partition board 2; the partition board 2 is a plane shell unit which is parallel to a flange surface formed by 6 flange edges 1.4, and a hexahedral solid unit of which the flange surface at the end part is attached with the adhesive colloid unit 3 is connected with the partition board 2 through a mathematical interpolation coupling algorithm;
sixthly, building the single hexagonal tubular shell honeycomb aluminum single cavity 1 in the fourth step into a honeycomb block by an array replication method, determining the number of the barriers needing array replication according to the length, width and height of the barriers needing to be built, and finally forming a front end block body structure model 4 of the energy-absorbing honeycomb barrier;
seventhly, taking the MPDB barrier as an example, adopting an MPDB standard barrier construction method, repeating the sixth step, and then building a middle block structure model 5 of the energy-absorbing cellular barrier and a rear end block structure model 6 of the energy-absorbing cellular barrier through a computer program, wherein a partition plate 2 is arranged between different module structure models, and different cellular barriers are connected to the partition plate 2 by using the colloid model to form three integrated monolithic barriers 7;
eighthly, building an outermost cover plate model 8 on the periphery of the whole block of the barrier in the seventh step through a computer program, and wrapping the whole block of the barrier model 7 in the cover plate model 8;
ninth, setting mechanical parameters of materials in the adhesive colloid model and mathematical control parameters of the whole model through a computer program, and describing deformation and stress states of the colloid unit under the condition of external acting force through the mechanical and mathematical parameters; meanwhile, different classification groups are built in the model, and a template file corresponding to the barrier model block is built for automatic report output of a calculation result;
and tenth, adding a barrier digital model into a simulation model of the whole vehicle in the design of the whole vehicle through a computer program to realize the whole process of collision safety simulation, and enabling computer software to automatically generate a simulation result report through a built template file after the calculation is finished.
In order to simulate the vehicle collision effectively and truly and avoid unnecessary loss caused by adopting a physical model collision, the invention has the preferred embodiment that the collision honeycomb barrier is a collision aluminum honeycomb barrier as shown in figures 2-5.
In order to truly and effectively simulate the stress condition of the bonding part in the collision test after the collision honeycomb barrier and the baffle movable cover plate are bonded by the bonding colloid, the preferred embodiment of the invention also discloses that the bonding colloid 3 is set by a computer program and is used for connecting a connecting method between a honeycomb aluminum port and a baffle perpendicular to the port.
In order to be able to simulate a vehicle collision in a truly effective manner, avoiding unnecessary losses due to a collision with a physical model, a preferred embodiment of the invention is furthermore that the radius of the hexagonal inscribed circle or circumscribed circle of the tubular housing unit 1, which is hexagonal in cross section, is 9mm to 120 mm.
In order to simulate the vehicle collision truly and effectively, avoid unnecessary loss caused by adopting a physical model collision and be suitable for different standards set by different countries for aluminum honeycomb barrier collision tests, the invention also discloses a method for designing the finite element collision barrier model, which is suitable for designing barrier finite element models required by various national regulatory standards, including any one of ODB, PDB, MDB, AEMDB and MPDB.
In order to simulate the vehicle collision effectively and truly and avoid unnecessary loss caused by the collision of a physical model, the preferred embodiment of the invention also adopts a parameter method based on a biological dummy digital model for the mechanical and mathematical parameters of the adhesive colloid 3, and the parameters are used for keeping better precision and stability under the condition of great deformation of the adhesive colloid.
In order to simulate the stress conditions of the viscose glue of different materials, the viscose glue with different bonding areas and different bonded viscose glue in a collision test and the stress conditions of different types of honeycomb aluminum models in a collision, the preferred embodiment of the invention also comprises that the parameters of the materials in the 3-body model of the bonding colloid in the ninth step comprise parameters of the bonding colloid material, bonding surface connection parameters of the bonding colloid and bonding thickness parameters of the bonding colloid, and the mathematical control parameters of the whole model comprise parameters of a honeycomb aluminum material, parameters of the honeycomb aluminum wall thickness, parameters of an inscribed circle or an circumscribed circle of the honeycomb aluminum, parameters of the honeycomb aluminum density, parameters of the honeycomb aluminum barrier block thickness, parameters of the honeycomb aluminum barrier block length and width, parameters of a partition plate, parameters of a cover plate material, parameters of a partition plate and parameters of the cover plate thickness.
In order to be able to simulate a vehicle collision in a truly effective manner, avoiding unnecessary losses due to collisions using a physical model, a preferred embodiment of the invention further provides that the computer program is adapted to any one of the ESI computer software product of france, the LS-dyna computer software product of LSTC, Altair radio computer software product of Altair, and abaqus computer software product of dalso, france.
In order to simplify the end flange and improve the squaring simulation efficiency, the preferred embodiment of the present invention further has a structure that the convex edge 1.3 in the second step is a rectangular convex edge, and the top corners are rectangular corners.
In order to avoid that the stress distribution of the bonding surface is not uniform enough and the proof of the stress analysis structure is influenced due to the concentrated stress of the tip, the convex edge in the second step is a rectangular convex edge 1.3 with an excessive arc chamfer, and the top end angle is a rectangular angle with a sheared angle being an arc angle.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for designing a finite element model of a bonding colloid of a collision honeycomb barrier is characterized by comprising the following design steps:
firstly, taking a tubular shell honeycomb aluminum single cavity with a hexagonal cross section by using a computer program, cutting six faces of the hexagonal tubular shell honeycomb aluminum single cavity at a honeycomb aluminum single cavity port, and taking out one surface of the six surfaces of the honeycomb aluminum single cavity, wherein the surfaces are not connected with each other;
secondly, cutting off top end angles on two sides of two ends of the surfaces which are not connected in the first step, cutting off the length and width of each top end angle to be 0.05-0.7 of the length of a hexagon, enabling the two ends of the surfaces which are not connected to each other to be provided with protruding edges, then re-splicing the six ends which are provided with protruding edges and the surfaces which are not connected to each other into a hexagonal tubular shell honeycomb aluminum single cavity, and then bending the protruding edges at the two end ports of the hexagonal tubular shell honeycomb aluminum single cavity towards the inner side of the hexagonal tubular shell honeycomb aluminum single cavity by ninety degrees to form flange edges at two ends of the hexagonal tubular shell honeycomb aluminum single cavity;
thirdly, carrying out parallel stretching on flange edges formed at two ends of the honeycomb aluminum single cavity of the hexagonal tubular shell in the second step, generating hexahedral solid units on the hexagon of the flange edges, and simulating the mechanical characteristics of bonding colloid between the honeycomb aluminum cavity and the partition plate in the actual honeycomb aluminum barrier by using the hexahedral solid units;
fourthly, adhering the adhesive colloid to the surface of the flange edge in the third step by using a computer program, so that the hexagonal tubular shell honeycomb aluminum single cavity forms a solid unit adhered with the adhesive colloid;
fifthly, connecting the entity units attached with the bonding colloid in the fourth step with the partition board; the partition board is a plane shell unit which is parallel to a flange face formed by 6 flange edges, and a hexahedral solid unit with an adhesive colloid unit attached to the flange face at the end part is connected with the partition board through a mathematical interpolation coupling algorithm;
sixthly, building a honeycomb block by using the single hexagonal tubular shell honeycomb aluminum single cavity in the fourth step through an array replication method, determining the number of the barriers needing array replication according to the length, width and height of the barriers needing to be built, and finally forming a block structure model of the energy-absorbing honeycomb barriers;
seventhly, adopting an MPDB standard barrier construction method, repeating the sixth method, and then building a middle block structure model of the energy-absorbing honeycomb barrier and a rear end block structure model of the energy-absorbing honeycomb barrier through a computer program, wherein a partition plate is arranged between different module structure models, and different honeycomb barriers are connected to the partition plate by using the colloid model to form three integrated whole block barriers;
eighthly, building an outermost cover plate model on the periphery of the whole block of the barrier in the seventh step through a computer program, and wrapping the whole block of the barrier model in the cover plate model;
ninth, setting mechanical parameters of materials in the adhesive colloid model and mathematical control parameters of the whole model through a computer program, and describing deformation and stress states of the colloid unit under the condition of external acting force through the mechanical and mathematical parameters; meanwhile, different classification groups are built in the model, and a template file corresponding to the barrier model block is built for automatic report output of a calculation result;
and tenth, adding a digital barrier model into a simulation model of the whole vehicle in the design of the whole vehicle through a computer program to realize the whole process of collision safety simulation, and automatically generating a simulation result report through computer software through a built template file after the calculation is finished.
2. The method of designing a finite element model of a crashing honeycomb barrier bonding colloid of claim 1, wherein the crashing honeycomb barrier is a crashing aluminum honeycomb barrier.
3. The method of designing a finite element model of a crash honeycomb barrier adhesive of claim 1 wherein said adhesive is provided by a computer program for a method of connecting between honeycomb aluminum ports and partitions perpendicular to the ports.
4. The method of designing a finite element model of a collision honeycomb barrier bonding colloid of claim 1, wherein the radius of the hexagonal inscribed circle or circumscribed circle of the tubular housing unit having a hexagonal cross-section is 9mm to 120 mm.
5. The method for designing a finite element model of a collision honeycomb barrier adhesive colloid according to claim 1, wherein the method is suitable for designing a barrier finite element model required by each national regulatory standard, and comprises any one of ODB, PDB, MDB, AEMDB, MPDB and the like.
6. The method for designing a finite element model of a collision honeycomb barrier bonding colloid according to claim 1, wherein the mechanical and mathematical parameters of the bonding colloid in the ninth step adopt a parameter method based on a digital model of a biological dummy, and the parameters are used for keeping good precision and stability of the bonding colloid under the condition of great deformation.
7. The method as claimed in claim 1, wherein the parameters of the materials in the cementitious colloid model in the ninth step include cementitious colloid material parameters, cementitious colloid bonding surface interface parameters, and cementitious colloid bonding thickness parameters, and the mathematical control parameters of the overall model include aluminum honeycomb material parameters, aluminum honeycomb wall thickness parameters, aluminum honeycomb inscribed or circumscribed circle parameters, aluminum honeycomb density parameters, aluminum honeycomb barrier thickness parameters, aluminum honeycomb barrier length and width parameters, and partition, cover material parameters, partition, and cover thickness parameters.
8. A method of designing a finite element model of a crash cell barrier adhesive gel as set forth in claim 1, wherein said computer program is adapted for use in any one of ESI corporation, vps computer software product, LSTC corporation, LS-dyna computer software product, Altair radio computer software product, alaqus computer software product, dalsoh corporation, france.
9. The method of designing a finite element model of a crash honeycomb barrier tie gel as set forth in claim 1 wherein said flange in said second step is a rectangular flange and said apex corners are rectangular corners.
10. The method of designing a finite element model of a crash honeycomb barrier tie gel as set forth in claim 1, wherein said convex edge in said second step is a rectangular convex edge with an excessive arc chamfer and said apex angle is a rectangular angle sheared by an arc angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011157538.5A CN112163363B (en) | 2020-10-26 | 2020-10-26 | Finite element model design method for collision honeycomb barrier bonding colloid |
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