CN109766579A - A kind of vehicle occupant restraint system optimization method based on CAE technology - Google Patents
A kind of vehicle occupant restraint system optimization method based on CAE technology Download PDFInfo
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Abstract
The present invention discloses a kind of vehicle occupant restraint system optimization method based on CAE technology, input data: 1.CAD geometry；2. body movement curve；3. dummy position；4. basic constraint system parameter.CAE basic model 50FRB/64ODB is then set up, is compared by injury.1. optimizing direction；2. Optimal Parameters；3. optimum level；4. optimizing matrix.Optimize operating condition DOE, then optimum results are analyzed, determines optimization operating condition optimized parameter, parameter substitutes into verifying operating condition, verifying operating condition verifying, then determines verifying operating condition optimized parameter；Vehicle occupant restraint system optimization method of this kind based on CAE technology optimizes front occupant restraint system using substep orthogonal experiment design method, improves optimization precision and controllability；Occupant restraint system parameter is screened, so that it is carried out matched well with dummy and car body, occupant injury value is made to meet design requirement；Using CAE technology, the verification experimental verification time during Car design and relevant cost are reduced.
Description
Technical field
The present invention relates to a kind of vehicle occupant restraint systems for being based on CAE (Computer Aided Engineering) technology
System optimization method, belongs to the l-G simulation test field of automotive crash safety.
Background technique
With the market competition of automobile product fierceness, constantly require automotive development enterprise with the shorter time, exploitation is more
Good product.With the fast development of computer technology, CAE technology is developed rapidly and is widely applied.It is opened in automobile
During hair, analysis for passive security, CAE technology has highlighted its important role and can replace part test, be
The shortening development cycle provides powerful guarantee.At present during automotive development, CAE technology can be verified more in a relatively short period of time
The prioritization scheme of operating condition, more rounds.
Vehicle occupant restraint system refers to the device to shield in automobile collision accident to occupant, including safety
Band, air bag, safety seat, collapse type steering column and steering wheel, instrument board etc..It is used earliest in occupant restraint system
It is safety belt, movement of the occupant relative to vehicle is constrained when brushing up against rolling before automobile generation, protection occupant can be played significantly
Effect.Air bag is also usually used to the interior occupant of protection, it and safety belt are used in combination and can carry out effectively to occupant
Protection.Therefore, the selection of occupant restraint system parameter and optimization design be frontal crash of vehicles safe design critical issue it
One.
The performance of occupant restraint system directly affects the final appraisal results of vehicle collision performance, so needing to vehicle
Occupant restraint system carries out choice of parameters and optimization design, and good occupant restraint system can be with vacation after passing through optimization design
People and car body Proper Match meet performance design requirement.
Summary of the invention
The present invention provides a kind of vehicle occupant restraint system optimization method based on CAE technology, with dummy and body construction
Proper Match is carried out, experimentation cost is reduced.
To achieve the above object, the present invention provides the following technical solutions:
A kind of vehicle occupant restraint system optimization method based on CAE technology of the present invention includes the following steps: that S1. is established
SYSTEM.REF_SPACE, as reference space.S2. body movement is loaded and is positioned with reference between space with being freely hinged
The loading position of body movement, to apply car body initial velocity and crash acceleration, the loading position of body movement is typically chosen
The position of left and right B column lower end is as load(ing) point.S3. it in the occupant restraint system modelling of cockpit and component, needs according to reality
Size and installation relation accurately modeled, the size of component can come from general arrangement data or design engineering drawing.S4. pacify
Full band model and the accuracy of positioning are sufficiently reflected the result accuracy of simulation.According to coiler, guide groove, height
The positional parameters such as degree adjuster, D ring, buckle, anchor point determine the ribbon trend and connection relationship of safe band model, can pass through
Carry out simulating Safety narrow fabrics to the insertion effect of dummy's body surface using orthotropy coefficient of friction.S5. ensure
The Housing of DAB.Airbag is a part of Steering, and the Housing of PAB.Airbag is a part of IP, and defines
Respective contact relation.Air bag is finite element model, and size and shape is identical as real vehicle installation condition.Carry out safety
Bag material and exhaust Porous materials setting, define gas generator parameter, including gas generator time of ignition, gas mass flow
With gas componant etc..S6. driver side restraint system simulation model and Passenger side restraint system simulation model are established, according to man-machine
Engineering size arranges the positioning relation for determining driver side and occupant side dummy and crew module's internal structure.S7. parameter is being carried out
When selection and optimization, it can be selected according to engineering experience to the biggish factor of occupant restraint systematic influence as DOE parameter.S8. right
Manikin head's injury values HIC, chest resultant acceleration C3ms, breast compressions amount Ccomp, left thigh axial compressive force FFL and the right side are big
Leg axial compressive force FFR, comprehensive evaluation index WIC carry out comprehensive observing, find out the best parameter group that can guarantee dummy's performance.
As a preferred technical solution of the present invention, restraint system component includes safety belt, preloader, force-limiting device, volume
Receive device, air bag, gas generator and the duration of ignition.
As a preferred technical solution of the present invention, analysis process quotes step S3: input data first: 1.CAD is several
What；2. body movement curve；3. dummy position；4. basic constraint system parameter.Then set up CAE basic model 50FRB/
64ODB is compared by injury.
As a preferred technical solution of the present invention, analysis process quotes step S8:1. and optimizes direction；2. optimization ginseng
Number；3. optimum level；4. optimizing matrix.Optimize operating condition DOE, then optimum results are analyzed, determines that optimization operating condition is optimal
Parameter, parameter substitutes into verifying operating condition, verifying operating condition verifying, then determines verifying operating condition optimized parameter；Vapour of this kind based on CAE technology
Vehicle occupant restraint system optimization method optimizes front occupant restraint system using substep orthogonal experiment design method and sets
Meter improves optimization precision and controllability.
As a preferred technical solution of the present invention, air bag is finite element model, and size and shape and real vehicle are pacified
Dress state is identical.
As a preferred technical solution of the present invention, safety belt uses MB+FE Combined type safety band.
As a preferred technical solution of the present invention, created with reference to space based on MADYMO software.
The beneficial effects obtained by the present invention are as follows being: using substep orthogonal experiment design method to front occupant restraint system into
Row optimization design improves optimization precision and controllability；Occupant restraint system parameter is screened, carries out it with dummy and car body good
Matching, makes occupant injury value meet design requirement；Using CAE technology, reduce verification experimental verification time during Car design and
Relevant cost.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings:
Fig. 1 is analysis flow chart diagram of the present invention；
Fig. 2 is dummy relative position of the present invention schematic diagram and measurement table figure；
Fig. 3 is occupant restraint various parts Parameter Map of the present invention；
Fig. 4 is the restraint system Optimal Parameters figure that the present invention is determined according to engineering experience；
Fig. 5 is driver side restraint system illustraton of model of the present invention；
Fig. 6 is Passenger side restraint system model figure of the present invention；
Fig. 7 is that dummy of the present invention injures optimum results figure；
In figure: 1, front windshield；2, driver airbag；3, fixed point on safety belt；4, safety belt；5, it furls
Device；6, fixed point under safety belt；7, pilot set；8, safety belt lock catch；9, knee air bag；10, it puts at foot；11, firewall；
12, instrument board；13, steering wheel and steering column；14, occupant-side safety airbag；15, occupant side seat；16, preceding floor；17, false
People.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein
Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Embodiment: as shown in figs. 1-7, include the following steps: that S1. establishes SYSTEM.REF_SPACE, as reference space.
S2. body movement loads and positions the loading position of body movement with reference between space to be freely hinged, to apply vehicle
Body initial velocity and crash acceleration, the loading position of body movement are typically chosen the position of left and right B column lower end as load(ing) point.
S3. it in the occupant restraint system modelling of cockpit and component, needs accurately to be built according to actual size and installation relation
Mould, the size of component can come from general arrangement data or design engineering drawing.S4. safe band model and the accuracy of positioning are to simulation
Result accuracy be sufficiently reflected.It is positioned according to coiler, guide groove, height adjuster, D ring, buckle, anchor point etc.
Parameter determines the ribbon trend and connection relationship of safe band model, can carry out mould by using orthotropy coefficient of friction
Insertion effect of the quasi- belt web to dummy's body surface.S5. ensure that the Housing of DAB.Airbag is the one of Steering
The Housing of part, PAB.Airbag is a part of IP, and defines respective contact relation.Air bag is limited
Meta-model, size and shape are identical as real vehicle installation condition.Air bag material and exhaust Porous materials setting are carried out, gas is defined
Generator parameter, including gas generator time of ignition, gas mass flow and gas componant etc..S6. driver side constraint is established
System simulation model and Passenger side restraint system simulation model are arranged according to human engineering size and determine driver side and occupant side
The positioning relation of dummy and crew module's internal structure.It S7., can be according to engineering experience selection pair when carrying out parameter selection and optimization
The biggish factor of occupant restraint systematic influence is as DOE parameter.S8. to manikin head's injury values HIC, chest resultant acceleration
C3ms, breast compressions amount Ccomp, left thigh axial compressive force FFL and right thigh axial compressive force FFR, comprehensive evaluation index WIC are carried out
Comprehensive observing finds out the best parameter group that can guarantee dummy's performance.
In order to keep vehicle occupant restraint system optimization method of this kind based on CAE technology practical, restraint system component
Including safety belt, preloader, force-limiting device, coiler, air bag, gas generator and the duration of ignition, analysis process reference step
Rapid S3: input data first: 1.CAD geometry；2. body movement curve；3. dummy position；4. basic constraint system parameter.Then
CAE basic model 50FRB/64ODB is established, is compared by injury.Analysis process quotes step S8:1. and optimizes direction；2. optimization
Parameter；3. optimum level；4. optimizing matrix.Optimize operating condition DOE, then optimum results are analyzed, determines optimization operating condition most
Excellent parameter, parameter substitutes into verifying operating condition, verifying operating condition verifying, then determines verifying operating condition optimized parameter；This kind is based on CAE technology
Vehicle occupant restraint system optimization method optimizes front occupant restraint system using substep orthogonal experiment design method and sets
Meter, improves optimization precision and controllability, air bag are finite element model, and size and shape is identical as real vehicle installation condition, peace
Full band uses MB+FE Combined type safety band, is created with reference to space based on MADYMO software.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (7)
1. a kind of vehicle occupant restraint system optimization method based on CAE technology, which comprises the steps of:
S1. SYSTEM.REF_SPACE is established, as reference space；
S2. body movement loads and positions the loading position of body movement with reference between space to be freely hinged, to apply
Extra bus body initial velocity and crash acceleration, the loading position of body movement are typically chosen the position of left and right B column lower end as load
Point；
S3. in the occupant restraint system modelling of cockpit and component, it is accurate to need to be carried out according to actual size and installation relation
Modeling, the size of component can come from general arrangement data or design engineering drawing；
S4. safe band model and the accuracy of positioning are sufficiently reflected the result accuracy of simulation.According to coiler,
The positional parameters such as guide groove, height adjuster, D ring, buckle, anchor point determine the ribbon trend and connection relationship of safe band model,
It can carry out simulating Safety narrow fabrics to the insertion effect of dummy's body surface by using orthotropy coefficient of friction；
S5. ensure that the Housing of DAB.Airbag is a part of Steering, the Housing of PAB.Airbag is the one of IP
Part, and define respective contact relation.Air bag material and exhaust Porous materials setting are carried out, gas generator is defined
Parameter, including gas generator time of ignition, gas mass flow and gas componant etc.；
S6. driver side restraint system simulation model and Passenger side restraint system simulation model are established, according to human engineering size
Arrange the positioning relation for determining driver side and occupant side dummy and crew module's internal structure；
S7. it when carrying out parameter selection and optimization, can be selected according to engineering experience to the biggish factor of occupant restraint systematic influence
As DOE parameter；
S8. to manikin head's injury values HIC, chest resultant acceleration C3ms, breast compressions amount Ccomp, left thigh axial compressive force
FFL and right thigh axial compressive force FFR, comprehensive evaluation index WIC carry out comprehensive observing, and the optimal of dummy's performance can be guaranteed by finding out
Parameter combination.
2. a kind of vehicle occupant restraint system optimization method based on CAE technology according to claim 1, feature exist
In restraint system component includes safety belt, preloader, force-limiting device, coiler, air bag, gas generator and the duration of ignition.
3. a kind of vehicle occupant restraint system optimization method based on CAE technology according to claim 1, feature exist
Step S3 is quoted in, analysis process: input data first: 1.CAD geometry；2. body movement curve；3. dummy position；4. basis
Restraint system parameter.CAE basic model 50FRB/64ODB is then set up, is compared by injury.
4. a kind of vehicle occupant restraint system optimization method based on CAE technology according to claim 1, feature exist
In analysis process quotes step S8:1. and optimizes direction；2. Optimal Parameters；3. optimum level；4. optimizing matrix.Optimize operating condition
DOE then analyzes optimum results, determines optimization operating condition optimized parameter, and parameter substitutes into verifying operating condition, and verifying operating condition is tested
Card, then determine verifying operating condition optimized parameter；Vehicle occupant restraint system optimization method of this kind based on CAE technology, using substep
Orthogonal experiment design method optimizes front occupant restraint system, improves optimization precision and controllability.
5. a kind of vehicle occupant restraint system optimization method based on CAE technology according to claim 1, feature exist
In the air bag is finite element model, and size and shape is identical as real vehicle installation condition.
6. a kind of vehicle occupant restraint system optimization method based on CAE technology according to claim 1, feature exist
In safety belt uses MB+FE Combined type safety band.
7. a kind of vehicle occupant restraint system optimization method based on CAE technology according to claim 1, feature exist
In with reference to space based on the creation of MADYMO software.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113954991A (en) * | 2021-12-06 | 2022-01-21 | 中国第一汽车股份有限公司 | Parameter acquisition method and device for constraint system |
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Application publication date: 20190517 |