CN105022884A - Stamping information mapping application method for whole vehicle safe collision simulation - Google Patents
Stamping information mapping application method for whole vehicle safe collision simulation Download PDFInfo
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- CN105022884A CN105022884A CN201510445429.6A CN201510445429A CN105022884A CN 105022884 A CN105022884 A CN 105022884A CN 201510445429 A CN201510445429 A CN 201510445429A CN 105022884 A CN105022884 A CN 105022884A
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Abstract
The invention provides a stamping information mapping application method for whole vehicle safe collision simulation, belonging to the field of automobile technology and solving the problem of long time spent on whole vehicle safe collision simulation in the prior art. The stamping information mapping application method for whole vehicle safe collision simulation comprises following steps of determining, according to a development object of a vehicle model, experimental working conditions to be considered in the whole vehicle safe collision simulation; establishing a list comprising workpieces needing stamping forming simulation analysis under all working conditions, and classifying the workpieces in the workpiece list; performing stamping forming simulation analysis on the workpieces by use of an incremental method and a batch one-step method according to the classification; recording the working procedures and parameters of stamping forming simulation analysis of all the workpieces; and mapping a result of stamping forming simulation analysis by use of the incremental method and the batch one-step method to the whole vehicle safe collision simulation. Through adoption of the method, the whole vehicle safe collision simulation precision can be guaranteed while the whole vehicle safe collision simulation time is shortened.
Description
Technical field
The invention belongs to automobile technical field, relate to a kind of for car load safety collision emulation punching press information MAP application process, particularly a kind of can effectively by punching press information MAP to the application process in car load safety collision realistic model.
Background technology
Making stamping parts by steel plate needs through multiple tracks plastic yield operations such as blanking, punching, drawing, flange, and plastic yield can make Components subregion thickness of slab thinning and occur unrelieved stress and plastic strain etc.Collision is a complicated dynamic response process relating to material nonlinearity, geometrical non-linearity and contact nonlinear, the deformation process of nonlinearity is very responsive to its initial stress-strain state, and the part thickness of slab change produced in forming process, unrelieved stress and plastic strain all have a direct impact collision precision of analysis and precision.The finite element model adopted in current collision simulation sets up according to ideal structure geometric model, the sectional dimension of each part, thickness of slab distribute and material property is design load, do not consider the impact that the manufacturing process such as pressing and jointing are brought to part geometry size and material property.Therefore, ram effect is applied in collision simulation to raising collision simulation precision and accuracy significant.
At present, the application of ram effect in the emulation of car load safety collision is also very not general, ram effect is considered in the emulation of car load safety collision by the main engine plants of only a few, that current VOLVO adopts is LS-OneStepStamp, belong to a plug-in unit of DYNA exploitation, the function of this plug-in unit can carry out single stage method impact briquetting emulation to car load panel beating in batches, and the defective element deletion of forming simulation can fall by program automatically, remains qualified unit INCLUDE in car load master file; The method can save the very large modeling time, but shortcoming is can not be corresponding with the impact briquetting simulation of reality, and there is any discrepancy with reality;
We adopt another kind of mode is emulate out by product impact briquetting according to the punch forming process of product, and according to three node mapping methods, the thickness after impact briquetting and strain information are mapped in the emulation of car load safety collision, the method need expend the longer time, but it is because emulate according to actual production technique, very close with the formed precision of reality, close to 90%.Therefore, in order to improve the simulation accuracy of car load safety collision, and shorten the time considering that ram effect spends, ensure effectively to refer to complete for ram effect in the emulation of car load safety collision, the punching press information MAP application process designing a set of favourable shortening simulation time is necessary.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of punching press information MAP application process for the emulation of car load safety collision, technical matters to be solved is: the simulation accuracy how ensureing car load safety collision shortening car load safety collision simulation time while.
Object of the present invention realizes by following technical proposal: a kind of punching press information MAP application process for the emulation of car load safety collision, it is characterized in that, described application process comprises the steps:
A, according to the experiment condition needing in the emulation of the development goal determination car load safety collision of vehicle to consider;
B, set up the product inventory needing to carry out impact briquetting simulation analysis under each operating mode respectively, the product in product inventory is classified according on the size that affects of car load safety collision;
C, the mode of method of addition and batch single stage method is adopted by the product under each operating mode to carry out impact briquetting simulation analysis respectively according to classification;
D, record each product and carry out operation and the parameter of impact briquetting simulation analysis by method of addition or batch single stage method;
E, the result after carrying out impact briquetting simulation analysis by method of addition and batch single stage method these two kinds of modes to be mapped in the emulation of car load safety collision.
Be used in the punching press information MAP application process of car load safety collision emulation at this, first, according to the development goal of vehicle, determine the experiment condition needing in the emulation of car load safety collision to consider, set up for each operating mode and need the product inventory carrying out impact briquetting simulation analysis, classify according to the influence degree of product to car load safety collision again, generally be divided into two classes, one class is little on the impact of car load safety collision, one class is large on the impact of car load safety collision, again according to this classification, batch single stage method and method of addition is adopted by product under each operating mode to carry out impact briquetting simulation analysis respectively, and the operation recorded in impact briquetting simulation analysis process and parameter, be convenient to later stage similar product and can carry out impact briquetting simulation analysis fast, afterwards the result of impact briquetting simulation analysis gained is mapped in car load safety collision realistic model, effectively can improve the simulation accuracy of car load safety collision, and shorten the time considering that ram effect spends.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision; in described steps A, need that the experiment condition considered comprises offset collision operating mode, head-on crash operating mode, side collision operating mode, rear impact operating mode, Collision of Flank Pole operating mode, roof static pressure operating mode, vehicle door side squeeze operating mode, low speed collision operating mode and pedestrian protecting operating mode.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step B, the deterministic process that product affects size in car load safety collision comprises the effect of product in the emulation of car load safety collision and position of analyzing each body in white sheet metal component under each operating mode.By analyze product car load safety collision emulation in effect and position can fast and effeciently distinguish each product, shorten complete automobile collision emulation time.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step B, if the product of body in white sheet metal component is positioned in the Path of Force Transfer of certain operating mode of complete automobile collision realistic model, then judge that this product is safety critical part, according to this basis for estimation, product under each operating mode is divided into safety critical part and non-security-critical part, and sets up safety critical part product inventory and non-security-critical part product inventory.Product under each operating mode is classified, provides convenient for carrying out impact briquetting emulation in different ways, and then the time of complete automobile collision emulation can be shortened.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step B, need the experiment condition considered suitably to arrange in pairs or groups in being emulated by car load safety collision, and then therefrom select safety critical part product inventory and non-security-critical part product inventory.Operating mode is suitably arranged in pairs or groups, can avoid carrying out repetition impact briquetting simulation analysis to the product all related between each operating mode, and then shorten the time of complete automobile collision emulation.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step C, all adopt the mode of method of addition to carry out impact briquetting simulation analysis the product in safety critical part product inventory, all adopted by the product in non-security-critical part product inventory the mode of batch single stage method to carry out impact briquetting simulation analysis.Method of addition is adopted by safety critical part to carry out impact briquetting simulation analysis, because method of addition needs the forecast and promote considering to process the processing step scheme of part, the die face scheme of each step and part development size, computational accuracy is high, and the simulation accuracy being so mapped to car load safety collision is high; Batch single stage method is adopted for non-security-critical part, simple and efficient, adopt aforesaid way can shorten the time of car load safety collision emulation while improving car load safety collision simulation accuracy.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step C, the step adopting method of addition to carry out impact briquetting simulation analysis comprises to be set up impact briquetting realistic model, arranges each technological process and parameter and impact briquetting analysis.Adopt method of addition to carry out impact briquetting simulation analysis, computational accuracy is high, forming analysis credible result.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step C, the step adopting batch single stage method to carry out impact briquetting simulation analysis comprises the shape of product of employing DYNA software package to part and solves calculating thus generate the development size of part, analyzes and judges simultaneously to the shaping situation of part.Batch single stage method does not need designing mould die face, simple and fast.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step D, the safety critical part carrying out method of addition impact briquetting simulation analysis will be needed under each operating mode to set up impact briquetting emulation Guide Book respectively, and in Guide Book the impact briquetting operation of record security key component and parameter.Set up impact briquetting emulation Guide Book, the impact briquetting emulation mode that the later stage searches this type of part can be convenient to.
In the above-mentioned punching press information MAP application process for the emulation of car load safety collision, in described step e, first car load safety collision realistic model is set up, collision model grid is divided with software Hypermesh, finite element model material and attribute are set, then the result after impact briquetting simulation analysis is mapped to car load safety collision realistic model.Impact briquetting simulation analysis result is mapped in car load safety collision realistic model, the analysis result closing to reality more of car load safety collision realistic model can be made, thus improve the simulation accuracy of car load safety collision.
Compared with prior art, this punching press information MAP application process being used for the emulation of car load safety collision has the following advantages:
1, the present invention according to the product of body in white sheet metal component car load safety collision emulation in effect and position, product under each operating mode is divided into two types, and then adopt two kinds of different modes to carry out impact briquetting simulation analysis, while shortening car load safety collision simulation time, improve the precision of car load safety collision emulation, ensure that ram effect is complete and effectively refer in the emulation of car load safety collision.
2, the product carrying out method of addition impact briquetting analysis that needs that the present invention puts in order according to each operating mode sets up an impact briquetting emulation Guide Book respectively, the content of this manual recording is impact briquetting operation based on this product on-the-spot and parameter, be convenient to the impact briquetting emulation mode that the later stage searches this type of part, shorten car load safety collision simulation time.
Embodiment
Be below specific embodiments of the invention, technical scheme of the present invention is further described, but the present invention is not limited to these embodiments.
This punching press information MAP application process being used for the emulation of car load safety collision comprises the steps:
A, according to the experiment condition needing in the emulation of the development goal determination car load safety collision of vehicle to consider, it needs, and the experiment condition considered comprises offset collision operating mode, head-on crash operating mode, side collision operating mode, rear impact operating mode, Collision of Flank Pole operating mode, roof static pressure operating mode, vehicle door side squeeze operating mode, low speed collision operating mode and pedestrian protecting operating mode;
B, set up the product inventory needing to carry out impact briquetting simulation analysis under each operating mode respectively, the product in product inventory is classified according on the size that affects of car load safety collision; The deterministic process that product affects size in car load safety collision comprises the effect of product in the emulation of car load safety collision and position of analyzing each body in white sheet metal component under each operating mode, if the product of body in white sheet metal component is positioned in the Path of Force Transfer of certain operating mode of complete automobile collision realistic model, then judge that this product is safety critical part, according to this basis for estimation, product under each operating mode is divided into safety critical part and non-security-critical part, and sets up safety critical part product inventory and non-security-critical part product inventory;
C, according to the classification in step B, all adopt the mode of method of addition to carry out impact briquetting simulation analysis the product in safety critical part product inventory, concrete steps comprise sets up impact briquetting realistic model, arranges each technological process and parameter, impact briquetting analysis; The mode of batch single stage method is all adopted by product in non-security-critical part product inventory to carry out impact briquetting simulation analysis, concrete steps comprise the shape of product of employing DYNA software package to part and solve calculating thus generate the development size of part, analyze and judge simultaneously to the shaping situation of part;
D, the safety critical part carrying out impact briquetting simulation analysis under each operating mode, will be needed to set up impact briquetting emulation Guide Book respectively, and in Guide Book the impact briquetting operation of record security key component and parameter;
E, carrying out in the emulation of car load safety collision, first car load safety collision realistic model is set up, collision model grid is divided with software Hypermesh, finite element model material and attribute are set, then the result after carrying out impact briquetting simulation analysis by method of addition and these two kinds of modes of batch single stage method is mapped in car load safety collision realistic model.
In stepb, preferably, need the experiment condition considered suitably to arrange in pairs or groups in being emulated by car load safety collision, and then therefrom set up safety critical part product inventory and non-security-critical part product inventory.Operating mode is suitably arranged in pairs or groups, can avoid carrying out repetition impact briquetting simulation analysis to the product all related between each operating mode, and then shorten the time of complete automobile collision emulation.
Below workflow of the present invention is further detailed:
According to the development goal of vehicle, first determine the experiment condition needing in the emulation of car load safety collision to consider, it needs, and the experiment condition considered comprises offset collision operating mode, head-on crash operating mode, side collision operating mode, rear impact operating mode, Collision of Flank Pole operating mode, roof static pressure operating mode, vehicle door side squeeze operating mode, low speed collision operating mode and pedestrian protecting operating mode, again according to the effect in the emulation of car load safety collision of the product of body in white sheet metal component and position, body in white product under each operating mode is divided into safety critical part and non-security-critical part, safety critical part wherein under offset collision operating mode comprises front beam inner and outer plates, left side energy-absorption box, left longeron inner and outer plates, left A post inner and outer plates, longeron under left floor, left longitudinal floor beam, left A post upper side beam structure, inner panel on left floor, front panel, safety critical part under head-on crash operating mode comprises front beam inner and outer plates, left/right energy-absorption box, left/right longeron inner and outer plates, left/right A post inner and outer plates, longeron under left/right floor, left/right longitudinal floor beam, left/right A post upper side beam structure, inner panel on left/right floor, front panel, safety critical part under side collision operating mode comprises left front/tail gate inner and outer plates, left front/tail gate collision prevention girders or crash bar, B post inner and outer plates, stiffening plate in B post, threshold inner and outer plates, left/right chair mounted crossbeam, left and right chair mounted overarm brace, safety critical part under rear impact operating mode comprises squab panel, rear cross beam, rear energy-absorption box, left/right floor side member inner and outer plates, rear floor, safety critical part under Collision of Flank Pole operating mode comprises B post inner and outer plates, stiffening plate in B post, A post side bar, top cover inner and outer plates, threshold inner and outer plates, left front car door inner and outer plates, safety critical part under roof static pressure operating mode comprises top cover inner and outer plates and stiffening plate, A post side bar inner and outer plates, safety critical part under vehicle door side squeezes operating mode comprises left front/tail gate inner and outer plates, left front/tail gate collision prevention girders or crash bar, and water cuts crossbeam, safety critical part under low speed collision operating mode comprises front beam inner and outer plates, left/right energy-absorption box, left/right longeron inner and outer plates, water tank upper beam inner panel, heating radiator sill inner and outer plates, safety critical part under pedestrian protecting operating mode comprises hood inner and outer plates, hood lock fixed head, hinge mounting plate, all the other products not in Path of Force Transfer are then non-security-critical part, the classification of dialogue Metal Sheets for Body-manufacturing product adopted respectively and process in two ways: wherein a kind of mode is, the safety critical part for the emulation of car load safety collision adopts method of addition to carry out impact briquetting simulation analysis, another kind of mode is, to not in Path of Force Transfer, the non-security-critical part less on the impact of car load safety collision adopts batch single stage method to carry out impact briquetting simulation analysis, before impact briquetting emulation is carried out to product, first confirm that an operating mode carries out car load safety collision simulation analysis, as for head-on crash operating mode, need under setting up head-on crash operating mode to adopt method of addition and batch single stage method to carry out the product inventory of impact briquetting simulation analysis, in the car load safety collision realistic model of head-on crash operating mode, safety critical part in Path of Force Transfer comprises front beam inner and outer plates, left/right energy-absorption box, left/right longeron inner and outer plates, left/right A post inner and outer plates, longeron under left/right floor, left/right longitudinal floor beam, left/right A post upper side beam structure, inner panel on left/right floor, front panel, namely the product on these body in whites needs to adopt method of addition to carry out impact briquetting simulation analysis, all the other products not in Path of Force Transfer are then non-security-critical part, batch single stage method is adopted to carry out impact briquetting simulation analysis, it mainly adopts a plug-in unit of DYNA to carry out batch processing, this software can molded article fast, and defective unit is deleted automatically, ensure that qualified effective unit is in impact briquetting realistic model, carrying out recording the application software degree points for attention of batch processing and setting up application guide in a batch method impact briquetting simulation process, after above-mentioned judgement, corresponding mode is adopted to carry out impact briquetting emulation according to classification to each product.Before carrying out method of addition impact briquetting simulation analysis, first need in software Hypermesh, to export Key file to the geometric model grid division of each product after arranging material properties respectively, in this Key file, the thickness of model is original depth and there is not plastic strain, the geometric model of each product is imported in software AutoForm simultaneously, to material, technique, moulds etc. arrange and carry out stamping simulation calculating, because due to vehicle design, the shape difference of safety critical part can not change a lot, punch forming process is more or less the same, in simulation process, the impact briquetting operation of this product on-the-spot and reference record are emulated in Guide Book to impact briquetting, be convenient to operate by step other similar products, shorten impact briquetting simulation time, after above-mentioned stamping simulation has calculated, the variation in thickness obtained and plastic strain result are mapped in the Key file exported from Hypermesh, map in the Key file successfully obtained the thickness and the plastic strain information that contain and calculate mapping from stamping simulation, the result of impact briquetting simulation analysis is mapped in car load safety collision realistic model, effectively can improve the simulation accuracy of car load safety collision, and by this application method each product under each operating mode carried out classifying thus carry out stamping simulation analysis in different ways, effectively can shorten car load safety collision simulation time, do not affect the emulation degree of accuracy of car load safety collision simultaneously.
In the present embodiment, except carrying out, except the emulation of car load safety collision, suitably to arrange in pairs or groups between operating mode to each operating mode successively, as offset collision operating mode and head-on crash operating mode, the safety critical part adopting method of addition to carry out impact briquetting simulation analysis is needed to include front beam inner and outer plates, left side energy-absorption box, left longeron inner and outer plates under two operating modes, left A post inner and outer plates, longeron under left floor, left longitudinal floor beam, left A post upper side beam structure, inner panel on left floor, front panel; So just can carry out one time punching molded simulation analysis to identical product, and under the technological process of above-mentioned product is recorded to two operating modes respectively, such operation effectively can shorten car load safety collision simulation time.
In addition, when considering pedestrian protecting operating mode, need the product in the collision area of pedestrian protecting to carry out method of addition impact briquetting simulation analysis.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1., for a punching press information MAP application process for car load safety collision emulation, it is characterized in that, described application process has following steps:
A, according to the experiment condition needing in the emulation of the development goal determination car load safety collision of vehicle to consider;
B, set up the product inventory needing to carry out impact briquetting simulation analysis under each operating mode respectively, the product in product inventory is classified according on the size that affects of car load safety collision;
C, the mode of method of addition and batch single stage method is adopted by the product under each operating mode to carry out impact briquetting simulation analysis respectively according to classification;
D, record each product and carry out operation and the parameter of impact briquetting simulation analysis by method of addition or batch single stage method;
E, the result after carrying out impact briquetting simulation analysis by method of addition and batch single stage method these two kinds of modes to be mapped in the emulation of car load safety collision.
2. the punching press information MAP application process for the emulation of car load safety collision according to claim 1; it is characterized in that; in described steps A, need that the experiment condition considered comprises offset collision operating mode, head-on crash operating mode, side collision operating mode, rear impact operating mode, Collision of Flank Pole operating mode, roof static pressure operating mode, vehicle door side squeeze operating mode, low speed collision operating mode and pedestrian protecting operating mode.
3. the punching press information MAP application process for the emulation of car load safety collision according to claim 1, it is characterized in that, in described step B, the deterministic process that product affects size in car load safety collision comprises the effect of product in the emulation of car load safety collision and position of analyzing each body in white sheet metal component under each operating mode.
4. the punching press information MAP application process for the emulation of car load safety collision according to claim 3, it is characterized in that, in described step B, if the product of body in white sheet metal component is positioned in the Path of Force Transfer of certain operating mode of complete automobile collision realistic model, then judge that this product is safety critical part, according to this basis for estimation, the product under each operating mode is divided into safety critical part and non-security-critical part, and sets up safety critical part product inventory and non-security-critical part product inventory.
5. the punching press information MAP application process for the emulation of car load safety collision according to claim 4, it is characterized in that, in described step C, all adopt the mode of method of addition to carry out impact briquetting simulation analysis the product in safety critical part product inventory, all adopted by the product in non-security-critical part product inventory the mode of batch single stage method to carry out impact briquetting simulation analysis.
6. the punching press information MAP application process for the emulation of car load safety collision according to claim 5, it is characterized in that, in described step C, the step adopting method of addition to carry out impact briquetting simulation analysis comprises to be set up impact briquetting realistic model, arranges each technological process and parameter and impact briquetting analysis.
7. the punching press information MAP application process for the emulation of car load safety collision according to claim 5, it is characterized in that, in described step C, the step adopting batch single stage method to carry out impact briquetting simulation analysis comprises the shape of product of employing DYNA software package to part and solves calculating thus generate the development size of part, analyzes and judges simultaneously to the shaping situation of part.
8. the punching press information MAP application process for the emulation of car load safety collision according to claim 5, it is characterized in that, in described step D, the safety critical part carrying out method of addition impact briquetting simulation analysis will be needed under each operating mode to set up impact briquetting emulation Guide Book respectively, and in Guide Book the impact briquetting operation of record security key component and parameter.
9. the punching press information MAP application process for the emulation of car load safety collision according to claim 1, it is characterized in that, in described step e, first car load safety collision realistic model is set up, collision model grid is divided with software Hypermesh, finite element model material and attribute are set, then the result after impact briquetting simulation analysis is mapped to car load safety collision realistic model.
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| CN113806873A (en) * | 2020-06-15 | 2021-12-17 | 宝山钢铁股份有限公司 | Metal material collision failure simulation method considering stamping forming influence |
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