CN109808467A - A kind of cactus biomimetic features anticollision car door and its optimum design method - Google Patents
A kind of cactus biomimetic features anticollision car door and its optimum design method Download PDFInfo
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- CN109808467A CN109808467A CN201910159387.8A CN201910159387A CN109808467A CN 109808467 A CN109808467 A CN 109808467A CN 201910159387 A CN201910159387 A CN 201910159387A CN 109808467 A CN109808467 A CN 109808467A
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- 241000219357 Cactaceae Species 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003592 biomimetic effect Effects 0.000 title claims description 34
- 238000005457 optimization Methods 0.000 claims abstract description 5
- 230000004044 response Effects 0.000 claims description 15
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000004422 calculation algorithm Methods 0.000 claims description 4
- 230000002068 genetic effect Effects 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000003050 experimental design method Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000013178 mathematical model Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 239000011664 nicotinic acid Substances 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 8
- 230000006872 improvement Effects 0.000 description 3
- 238000012913 prioritisation Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses one kind to be based on cactus structural collision protection car door and its optimum design method, and anticollision car door includes interior inner panel, door skin, filling inner core, door anti-collision joist and window frame；Filling inner core is based on cactus surface structure progress Bionic Design and is made, by pure forming corrugations of bionical cactus structure when by external impact so that vehicle absorbs collision energy when by side collision as far as possible；Filling inner core is fixed among the gap between door skin, inner plate of car door, and door anti-collision joist and inner plate of car door are fixed.When optimization; choose the target that car door vertical stiffness, fundamental frequency, car door quality and Side-impact safety optimize as automobile door structure; are reinforced by plate thickness and is optimized for door skin thickness, inner plate of car door thickness, filling inner core thickness, car door anti-collision cantilever thickness, inner plate of car door, promotes the crashworthiness of car door to protect the safety of passenger.
Description
Technical field
The present invention relates to vehicle passive safety protection field more particularly to a kind of cactus biomimetic features anticollision car door and its
Optimum design method.
Background technique
Important component of the car door as body of a motor car, it is light-weighted while must satisfy collision performance requirement, simultaneously
The NVH performance for obviously vibrating and influencing vehicle should not be generated by engine, road surface equal excitation.When side collision is occurring for automobile
When, car door intrusion volume is larger, can not provide enough occupant spaces and absorption energy as much as possible.There are aiming at the problem that,
Common method is to optimize to car door or some energy-absorbing materials such as filled and process, honeycomb aluminum at present, although can be with
So that car door energy absorption characteristics obtain improvement to a certain extent, but consider the coordination optimality of various operating conditions, these are traditional
Mode can not make biggish improvement to the overall performance of car door.
Summary of the invention
The technical problem to be solved by the present invention is to it is imitative to provide a kind of cactus for the deficiency being previously mentioned in background technique
Raw structural collision protection car door and its optimum design method.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of cactus biomimetic features anticollision car door includes inner plate of car door, door skin, filling inner core, door anti-collision joist and vehicle
Window frame structure；
The door skin, the edge of inner plate of car door are mutually connected, and door skin is matched to the direction protrusion far from inner plate of car door
Close the shell for being formed and there is gap；
The door anti-collision joist is placed in the gap between door skin, inner plate of car door and the inner plate of car door is connected；
The filling inner core is formed by cactus biomimetic features unit cell array, is placed in the gap between door skin, inner plate of car door
In, it is connected respectively with door skin, inner plate of car door, absorbs energy when side collision occurs for vehicle；
The cactus biomimetic features unit cell is in hexagonal star-shape, and six within angle sizes are identical, 12 sides are isometric；
The top edge of the window frame structure and door skin, inner plate of car door is connected, for installing vehicle glass.
As a kind of further prioritization scheme of cactus biomimetic features anticollision car door of the invention, the bionical knot of cactus
Structure unit cell each edge length is 8mm, and the within angle size between every two sides is 70 degree.
As a kind of further prioritization scheme of cactus biomimetic features anticollision car door of the invention, the door skin and vehicle
The edge of door inner panel is connected by welding manner.
As a kind of further prioritization scheme of cactus biomimetic features anticollision car door of the invention, the thickness of the door skin
Degree is 2.2mm, inner plate of car door with a thickness of 1.5mm, the wall thickness of cactus biomimetic features unit cell is 0.8mm, and door anti-collision joist is thick
Degree is 1.8mm.
The invention also discloses a kind of cactus biomimetic features anticollision car door optimum design methods comprising the steps of:
Step 1) establishes the CAD mould of inner plate of car door, door skin, filling inner core, door anti-collision joist respectively in Catia software
They successively imported into Hypermesh software and carry out GTD model and grid dividing, are combined into car door model, and set by type
It is as follows to set each initial value: door skin with a thickness of 2.2mm, inner plate of car door with a thickness of 1.5mm, cactus biomimetic features list
The wall thickness of born of the same parents is 0.8mm, door anti-collision joist with a thickness of 1.8mm；
Step 2, in Isight software, using optimal Latin hypercube experimental design method, to preset variable in default threshold
It is worth in range and chooses 60 groups of sample points；
The design variables include door skin thickness t1, inner plate of car door thickness t2, filling core arrangement thickness t3, car door anti-collision
Cantilever thickness t4, window frame structural thickness t5, preset threshold range is successively are as follows: t1:[1.8-2.6], t2:[1-2], t3:[0.5-
1.2], t4:[1.3-2.3], t5:[0.6-1.4], unit is mm；
According to the sample point of selection, 60 groups of anticollision car door finite element models are established, respectively in hypermesh with Hypermesh
It is that analysis tool establishes two analysis operating conditions of car door vertical stiffness and Free Modal respectively with Nastran, to 60 groups established
Car door finite element model carries out vertical stiffness and Free Modal Analysis；
Step 3), the result obtained according to analysis establish the second-order response face mould of vertical stiffness and fundamental frequency using response phase method
Type replaces the related coefficient and root-mean-square error of finite element model and the response surface model of inspection institute's foundation with approximate model；
Step 4) is established the side impact model of 60 groups of car door finite element models in hypermesh and is imported into LS-DYNA
Simulation calculation is carried out, statistics total energy-absorbing of anticollision car door, the acceleration of inner plate of car door, the gross mass of car door, inner plate of car door are invaded
Enter amount, the second-order response surface model of aforementioned four index and the correctness of testing model are established by response phase method；
Step 5), using the longitudinal energy of car door, the acceleration of inner plate of car door, the intrusion volume of inner plate of car door, the gross mass of car door as excellent
Change target, using vertical stiffness and fundamental frequency as constraint condition, the mathematical model of anticollision car door optimization is established, using multiple target
Genetic algorithm is solved, and optimum results are obtained.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
1. the present invention proposes a kind of cactus biomimetic features anticollision car door, by cactus biomimetic features by axial impact
When pure forming corrugations efficiently solve traditional car door intrusion volume it is excessive, absorb energy it is ineffective the defects of；
2. carrying out multi-objective optimization design of power to cactus biomimetic features anticollision car door using multi-objective genetic algorithm, guarantee vehicle
NVH performance, further increase the integral energy-absorbing characteristic of biomimetic features anticollision car door.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of cactus biomimetic features unit cell in the present invention.
In figure, 1- window frame structure, 2- door skin, 3- inner plate of car door, 4- filling inner core, 5- door anti-collision joist.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing:
The present invention can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.On the contrary, providing
These embodiments are thoroughly and complete to make the disclosure, and will give full expression to the scope of the present invention to those skilled in the art.
In the accompanying drawings, for the sake of clarity it is exaggerated component.
As shown in Figure 1, a kind of cactus biomimetic features anticollision car door, comprising inner plate of car door, door skin, filling inner core,
Door anti-collision joist and window frame structure；
The door skin, the edge of inner plate of car door are mutually connected, and door skin is matched to the direction protrusion far from inner plate of car door
Close the shell for being formed and there is gap；
The door anti-collision joist is placed in the gap between door skin, inner plate of car door and the inner plate of car door is connected；
The filling inner core is formed by cactus biomimetic features unit cell array, is placed in the gap between door skin, inner plate of car door
In, it is connected respectively with door skin, inner plate of car door, absorbs energy when side collision occurs for vehicle；
As shown in Fig. 2, the cactus biomimetic features unit cell is in hexagonal star-shape, identical, 12 sides of six within angle sizes etc.
It is long；
The top edge of the window frame structure and door skin, inner plate of car door is connected, for installing vehicle glass.
The cactus biomimetic features unit cell each edge length is 8mm, and the within angle size between every two sides is 70 degree；
The edge of door skin and inner plate of car door is connected by welding manner.
The door skin with a thickness of 2.2mm, inner plate of car door with a thickness of 1.5mm, cactus biomimetic features unit cell
Wall thickness is 0.8mm, and door anti-collision joist is with a thickness of 1.8mm.
The invention also discloses a kind of cactus biomimetic features anticollision car door optimum design methods comprising the steps of:
Step 1) establishes the CAD mould of inner plate of car door, door skin, filling inner core, door anti-collision joist respectively in Catia software
They successively imported into Hypermesh software and carry out GTD model and grid dividing, are combined into car door model, and set by type
It is as follows to set each initial value: door skin with a thickness of 2.2mm, inner plate of car door with a thickness of 1.5mm, cactus biomimetic features list
The wall thickness of born of the same parents is 0.8mm, door anti-collision joist with a thickness of 1.8mm；
Step 2, in Isight software, using optimal Latin hypercube experimental design method, to preset variable in default threshold
It is worth in range and chooses 60 groups of sample points；
The design variables include door skin thickness t1, inner plate of car door thickness t2, filling core arrangement thickness t3, car door anti-collision
Cantilever thickness t4, window frame structural thickness t5, preset threshold range is successively are as follows: t1:[1.8-2.6], t2:[1-2], t3:[0.5-
1.2], t4:[1.3-2.3], t5:[0.6-1.4], unit is mm；
According to the sample point of selection, 60 groups of anticollision car door finite element models are established, respectively in hypermesh with Hypermesh
It is that analysis tool establishes two analysis operating conditions of car door vertical stiffness and Free Modal respectively with Nastran, to 60 groups established
Car door finite element model carries out vertical stiffness and Free Modal Analysis；
Step 3), the result obtained according to analysis establish the second-order response face mould of vertical stiffness and fundamental frequency using response phase method
Type replaces the related coefficient and root-mean-square error of finite element model and the response surface model of inspection institute's foundation with approximate model；
Step 4) is established the side impact model of 60 groups of car door finite element models in hypermesh and is imported into LS-DYNA
Simulation calculation is carried out, statistics total energy-absorbing of anticollision car door, the acceleration of inner plate of car door, the gross mass of car door, inner plate of car door are invaded
Enter amount, the second-order response surface model of aforementioned four index and the correctness of testing model are established by response phase method；
Step 5), using the longitudinal energy of car door, the acceleration of inner plate of car door, the intrusion volume of inner plate of car door, the gross mass of car door as excellent
Change target, using vertical stiffness and fundamental frequency as constraint condition, the mathematical model of anticollision car door optimization is established, using multiple target
Genetic algorithm is solved, and optimum results are obtained.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (5)
1. a kind of cactus biomimetic features anticollision car door, which is characterized in that include inner plate of car door, door skin, filling inner core, vehicle
Door collision prevention girders and window frame structure；
The door skin, the edge of inner plate of car door are mutually connected, and door skin is matched to the direction protrusion far from inner plate of car door
Close the shell for being formed and there is gap；
The door anti-collision joist is placed in the gap between door skin, inner plate of car door and the inner plate of car door is connected；
The filling inner core is formed by cactus biomimetic features unit cell array, is placed in the gap between door skin, inner plate of car door
In, it is connected respectively with door skin, inner plate of car door, absorbs energy when side collision occurs for vehicle；
The cactus biomimetic features unit cell is in hexagonal star-shape, and six within angle sizes are identical, 12 sides are isometric；
The top edge of the window frame structure and door skin, inner plate of car door is connected, for installing vehicle glass.
2. cactus biomimetic features anticollision car door according to claim 1, which is characterized in that the cactus biomimetic features
Unit cell each edge length is 8mm, and the within angle size between every two sides is 70 degree.
3. cactus biomimetic features anticollision car door according to claim 1, which is characterized in that the door skin and car door
The edge of inner panel is connected by welding manner.
4. a kind of cactus biomimetic features anticollision car door according to claim 1, which is characterized in that the door skin
With a thickness of 2.2mm, inner plate of car door with a thickness of 1.5mm, the wall thickness of cactus biomimetic features unit cell is 0.8mm, door anti-collision joist
With a thickness of 1.8mm.
5. be based on cactus biomimetic features anticollision car door optimum design method described in claim 1, which is characterized in that comprising with
Lower step:
Step 1) establishes the CAD mould of inner plate of car door, door skin, filling inner core, door anti-collision joist respectively in Catia software
They successively imported into Hypermesh software and carry out GTD model and grid dividing, are combined into car door model, and set by type
It is as follows to set each initial value: door skin with a thickness of 2.2mm, inner plate of car door with a thickness of 1.5mm, cactus biomimetic features list
The wall thickness of born of the same parents is 0.8mm, door anti-collision joist with a thickness of 1.8mm；
Step 2, in Isight software, using optimal Latin hypercube experimental design method, to preset variable in default threshold
It is worth in range and chooses 60 groups of sample points；
The design variables include door skin thickness t1, inner plate of car door thickness t2, filling core arrangement thickness t3, car door anti-collision
Cantilever thickness t4, window frame structural thickness t5, preset threshold range is successively are as follows: t1:[1.8-2.6], t2:[1-2], t3:[0.5-
1.2], t4:[1.3-2.3], t5:[0.6-1.4], unit is mm；
According to the sample point of selection, 60 groups of anticollision car door finite element models are established, respectively in hypermesh with Hypermesh
It is that analysis tool establishes two analysis operating conditions of car door vertical stiffness and Free Modal respectively with Nastran, to 60 groups established
Car door finite element model carries out vertical stiffness and Free Modal Analysis；
Step 3), the result obtained according to analysis establish the second-order response face mould of vertical stiffness and fundamental frequency using response phase method
Type replaces the related coefficient and root-mean-square error of finite element model and the response surface model of inspection institute's foundation with approximate model；
Step 4) is established the side impact model of 60 groups of car door finite element models in hypermesh and is imported into LS-DYNA
Simulation calculation is carried out, statistics total energy-absorbing of anticollision car door, the acceleration of inner plate of car door, the gross mass of car door, inner plate of car door are invaded
Enter amount, the second-order response surface model of aforementioned four index and the correctness of testing model are established by response phase method；
Step 5), using the longitudinal energy of car door, the acceleration of inner plate of car door, the intrusion volume of inner plate of car door, the gross mass of car door as excellent
Change target, using vertical stiffness and fundamental frequency as constraint condition, the mathematical model of anticollision car door optimization is established, using multiple target
Genetic algorithm is solved, and optimum results are obtained.
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| CN201910159387.8A CN109808467A (en) | 2019-03-04 | 2019-03-04 | A kind of cactus biomimetic features anticollision car door and its optimum design method |
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Application publication date: 20190528 |