CN104504178A - Connection method for acceleration sensors in CAE collision model - Google Patents
Connection method for acceleration sensors in CAE collision model Download PDFInfo
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- CN104504178A CN104504178A CN201410741808.5A CN201410741808A CN104504178A CN 104504178 A CN104504178 A CN 104504178A CN 201410741808 A CN201410741808 A CN 201410741808A CN 104504178 A CN104504178 A CN 104504178A
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Abstract
The invention relates to the technical field of computer aided engineering (CAE), in particular to a connection method for acceleration sensors in a CAE collision model. The method at least comprises the following steps: creating an acceleration sensor unit on a target assembly, creating a sensor coordinate system, converting the coordinate of the acceleration sensor unit to the sensorcoordinate system from a complete vehicle coordinate system, copying out the accelerationsensor unit from the target assembly, and finally enabling the accelerationsensor unit and the target assembly to be relatively static and spaced from each other. According to the method, the accelerationsensor unit and the target assembly are relatively static and spaced from each other, so that the accelerationsensor unit and the target assembly do not need to be connected together again when the position change quantity of a projection node in a projection region is smaller than a contact distance, the problem that the accelerationsensor unit and the target assembly need to be connected again when the target assembly connected with the acceleration sensor unit is changed can be solved, the working efficiency is improved, the time is saved, and the manpower cost is reduced.
Description
Technical field
The present invention relates to computer-aided engineering (CAE) technical field, be specifically related to the method for attachment of acceleration transducer in a kind of CAE collision model.
Background technology
In recent years, the real train test of vehicle collision security is the authoritative means of examination Vehicle Passive Safety always.Under the guiding of guidance system, vehicle hits fixation wall.Whole collision process is recorded by high-speed camera equipment so that playback is to realize reproducing at a slow speed, arranged by the data of electrical measuring systems by the sensor collection be arranged in car, the result obtain arrangement and normal data contrast, to examine the collision performance of tested vehicle.In reality, the collision physical test cycle is long, costly, image data exists limitation.Along with the development of technology of numerical simulation, become in the passive security performance that the design phase holds vehicle the important method improving Vehicle Passive Safety by simulation means.
In the modeling process of complete automobile collision model, conveniently, unified management complete automobile collision model, usually acceleration transducer is included in whole vehicle model as a unit, but how this unit and whole vehicle model being linked together is the problem studied, the method that tradition connects is that acceleration transducer is placed on one in target collision pattern assembly (target assembly), such as, in body in white assembly, connected mode is intercoupled with the node belonging to body in white assembly by the node belonging to acceleration transducer.This method can realize the connection of acceleration transducer and collision model assembly, but when the collision model assembly being connected with acceleration transducer changes, need to redefine the corresponding relation between node and the node belonging to acceleration transducer belonging to collision model assembly, produce repeated labor, delay project development process, waste human cost.
Summary of the invention
The present invention solves in the method for attachment of existing acceleration transducer, needs the technical matters of the annexation re-established between acceleration transducer and collision model assembly with acceleration transducer when the collision model assembly be connected changes.
For solving the problems of the technologies described above, the invention provides following technical scheme: the method for attachment of acceleration transducer in a kind of CAE collision model, comprise and set up finite element grid model, under car load coordinate system, then select a collision model assembly as target assembly, also comprise:
Step 101: set up acceleration transducer unit on target assembly, the acceleration transducer unit set up comprises four sensor nodes, and these four sensor nodes are in same plane and surround square;
Step 102: set up sensor coordinate system, makes three of sensor coordinate system coordinate axis be parallel to three coordinate axis of car load coordinate system respectively;
Step 103: the coordinate of degree of will speed up sensor unit is from car load ordinate transform to sensor coordinate system;
Step 104: degree of will speed up sensor unit copies out from target assembly;
Step 105: the position of fixing acceleration transducer unit, makes acceleration transducer unit and target assembly geo-stationary and spaced apart.
In preferred scheme, collision model assembly comprises: body assembly, four-door two-lid assembly, seat assembly, engine assembly, dashboard cross member and column assy, front-end module assembly, front-end and back-end exterior trimming parts assembly and chassis assembly.
In preferred scheme, the position of fixing acceleration transducer unit, make acceleration transducer unit and target assembly geo-stationary and spaced apartly specifically to comprise: in target assembly, selecting a view field, view field comprises four projection nodes, view field and acceleration transducer unit place plane parallel, and make when acceleration transducer unit fits to view field, each sensor node is corresponding with the node that projects, and makes the distance between sensor node to corresponding projection node be less than nominal distance; Then make acceleration transducer unit and target assembly geo-stationary, acceleration transducer unit place plane is less than with the distance of view field and contacts distance.
In preferred scheme, nominal distance is 0.5mm.In preferred scheme, contact distance is 5mm.
Method degree of will speed up sensor provided by the invention is arranged under different coordinate systems from collision model assembly, then the position of acceleration transducer unit is fixed, make acceleration transducer unit and target assembly geo-stationary and spaced apart, thus realize the connection of acceleration transducer unit and target assembly; The present invention is provided with and contacts distance between acceleration transducer unit with target assembly, solve the problem needing the annexation re-established between acceleration transducer and target assembly when the target assembly be connected with acceleration transducer changes, improve work efficiency, time and manpower is saved cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the method flow diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, present embodiments provide the method for attachment of acceleration transducer in a kind of CAE collision model, comprise and set up finite element grid model, then under car load coordinate system, select a collision model assembly as target assembly, finite element grid model is made up of node, and collision model assembly can comprise: body assembly, four-door two-lid assembly, seat assembly, engine assembly, dashboard cross member and column assy, front-end module assembly, front-end and back-end exterior trimming parts assembly and chassis assembly.
Above-mentioned method of attachment also comprises:
Step 101: set up acceleration transducer unit on target assembly, the acceleration transducer unit set up comprises four sensor nodes, and these four sensor nodes are in same plane and surround square;
Sensor node and projection node are the node in finite element grid model within a context, surround foursquare four sensor nodes and can be four adjacent nodes and node in same plane, but also can be non-conterminously in same plane, surround foursquare node; Step 101 can be realized by the Node order of ANSA software.
Step 102: set up sensor coordinate system, makes three of sensor coordinate system coordinate axis be parallel to three coordinate axis of car load coordinate system respectively.
Step 103: the coordinate of degree of will speed up sensor unit is from car load ordinate transform to sensor coordinate system; Wherein, step 102 and step 103 can be realized by the accelerometer order of ANSA software, make the coordinate axis X of car load coordinate system, Y, Z be parallel to coordinate axis X', Y', Z' of sensor coordinate system respectively.
Step 104: degree of will speed up sensor unit copies out from target assembly; Wherein, step 104 can be realized by the Output order of ANSA software.
Step 105: the position of fixing acceleration transducer unit, makes acceleration transducer unit and target assembly geo-stationary and spaced apart; Wherein, step 105 can by the key word in the Input order of ANSA software and LS-DYNA software: * CONTACT_TIED_NODES_TO_SURFACE_OFFSET_ID realizes; Specifically comprise: in collision model assembly, select a view field, view field comprises four projection nodes, view field is in a plane, view field and acceleration transducer unit place plane parallel, and make when acceleration transducer unit fits to view field, each sensor node is corresponding with the node that projects, and makes the distance between sensor node to corresponding projection node be less than nominal distance; Then make acceleration transducer unit and target assembly geo-stationary, acceleration transducer unit place plane is less than with the distance of view field and contacts distance.Preferably, nominal distance is 0.5mm.Preferably, contact distance is 5mm.In the project development stage, the node location of target assembly may often be changed, and above-mentioned steps set up annexation can ensure the projection node location knots modification of view field be less than contact distance 5mm time do not need to re-establish the annexation between acceleration transducer unit and target assembly, avoid the duplication of labour, time and manpower is saved cost.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (5)
1. the method for attachment of acceleration transducer in CAE collision model, comprises and sets up finite element grid model, under car load coordinate system, then selects a collision model assembly as target assembly, it is characterized in that, also comprise:
Step 101: set up acceleration transducer unit on target assembly, the acceleration transducer unit set up comprises four sensor nodes, and these four sensor nodes are in same plane and surround square;
Step 102: set up sensor coordinate system, makes three of sensor coordinate system coordinate axis be parallel to three coordinate axis of car load coordinate system respectively;
Step 103: the coordinate of degree of will speed up sensor unit is from car load ordinate transform to sensor coordinate system;
Step 104: degree of will speed up sensor unit copies out from target assembly;
Step 105: the position of fixing acceleration transducer unit, makes acceleration transducer unit and target assembly geo-stationary and spaced apart.
2. the method for attachment of acceleration transducer in CAE collision model according to claim 1, it is characterized in that, collision model assembly comprises: body assembly, four-door two-lid assembly, seat assembly, engine assembly, dashboard cross member and column assy, front-end module assembly, front-end and back-end exterior trimming parts assembly and chassis assembly.
3. the method for attachment of acceleration transducer in CAE collision model according to claim 1, it is characterized in that, the position of fixing acceleration transducer unit, make acceleration transducer unit and target assembly geo-stationary and spaced apartly specifically to comprise: in target assembly, selecting a view field, view field comprises four projection nodes, view field and acceleration transducer unit place plane parallel, and make when acceleration transducer unit fits to view field, each sensor node is corresponding with the node that projects, the distance between sensor node to corresponding projection node is made to be less than nominal distance, then make acceleration transducer unit and target assembly geo-stationary, acceleration transducer unit place plane is less than with the distance of view field and contacts distance.
4. the method for attachment of acceleration transducer in CAE collision model according to claim 3, it is characterized in that, nominal distance is 0.5mm.
5. the method for attachment of acceleration transducer in CAE collision model according to claim 3, is characterized in that, contact distance is 5mm.
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| CN201410741808.5A CN104504178B (en) | 2014-12-09 | 2014-12-09 | The connection method of acceleration transducer in a kind of CAE collision models |
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| CN201410741808.5A CN104504178B (en) | 2014-12-09 | 2014-12-09 | The connection method of acceleration transducer in a kind of CAE collision models |
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| CN104504178A true CN104504178A (en) | 2015-04-08 |
| CN104504178B CN104504178B (en) | 2017-09-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108228937A (en) * | 2016-12-21 | 2018-06-29 | 华晨汽车集团控股有限公司 | A kind of steering mechanism simulation method based on CAE |
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| KR20050037096A (en) * | 2003-10-17 | 2005-04-21 | 현대자동차주식회사 | A method for detecting fail of top gear recognition switch in manual transmission of automobile |
| CN102842156A (en) * | 2012-09-21 | 2012-12-26 | 电子科技大学 | Method and device for acquiring vehicle driving condition data and estimating vehicle driving condition |
| CN103640480A (en) * | 2013-12-05 | 2014-03-19 | 傅鸳鸯 | Vehicle gear recognition method and device |
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| KR20050037096A (en) * | 2003-10-17 | 2005-04-21 | 현대자동차주식회사 | A method for detecting fail of top gear recognition switch in manual transmission of automobile |
| CN102842156A (en) * | 2012-09-21 | 2012-12-26 | 电子科技大学 | Method and device for acquiring vehicle driving condition data and estimating vehicle driving condition |
| CN103640480A (en) * | 2013-12-05 | 2014-03-19 | 傅鸳鸯 | Vehicle gear recognition method and device |
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| 周会锋等: "RADIOSS整车碰撞模型转换方法及其应用", 《机械设计与研究》 * |
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| CN108228937A (en) * | 2016-12-21 | 2018-06-29 | 华晨汽车集团控股有限公司 | A kind of steering mechanism simulation method based on CAE |
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