CN106394693B - A kind of bionical automobile top cover outer plate with variable curvature characteristic - Google Patents
A kind of bionical automobile top cover outer plate with variable curvature characteristic Download PDFInfo
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- CN106394693B CN106394693B CN201610891211.8A CN201610891211A CN106394693B CN 106394693 B CN106394693 B CN 106394693B CN 201610891211 A CN201610891211 A CN 201610891211A CN 106394693 B CN106394693 B CN 106394693B
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- top cover
- curve
- head
- sparrow
- vertical section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/06—Fixed roofs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D65/00—Designing, manufacturing, e.g. assembling, facilitating disassembly, or structurally modifying motor vehicles or trailers, not otherwise provided for
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The present invention relates to a kind of automobile head cover, specially a kind of biomimetic type automobile top cover outer plate with variable curvature characteristic.Variable curvature head cover outside plate of the present invention uses Bionic Design theory; sparrow head vertical section outer profile curve with good air dynamic behaviour is used for the design of car body top cover vertical section directrix; preferably to driver's cabin and can drive indoor member and play protection, tetra-inclusion complex, at the same it is heat-insulated, soundproof effect is more preferable.The present invention improves the fuel economy of automobile to a certain extent, while having both moulding streamline, advantage aesthetic in appearance, air resistance coefficient is small.
Description
Technical field
The present invention relates to a kind of automobile head cover, specially a kind of biomimetic type automobile top cover outer plate with variable curvature characteristic.
Technical background
Important component of the automobile head cover as body shape, it largely determines automobile of people couple
First feel, while it again be influence automotive aerodynamics, fuel economy, dynamic property an important factor for one of.
Studies have shown that automobile its main resistance when running at high speed is air drag.When automobile is with the speed row of 80km/h
When sailing, the power of engine 60% is used for overcoming air drag；When automobile with the speed of 150km/h when driving, air drag is
2-3 times of rolling resistance.If body drag coefficient reduces by 10%, then fuel oil 7% or so can be saved.This means that by excellent
Vehicle fuel economy and dynamic property can be effectively improved by changing car body top cover geometry.
Existing car body top cover mostly uses " sandwich " structure, i.e., is composed of head cover outside plate, top cover inner plate, interior trim,
Wherein head cover is the direct component contacted with air, is the direct component for influencing body drag coefficient.Traditional vehicle top
Lid mostly uses mould punching and forms, and spherical shape shape is substantially presented in diel geometry, this is mainly due to cost and technique
Consider.Though the automobile head cover of traditional handicraft punching press has centainly streamlined, past in wind tunnel experiment with this molding head cover
Toward that cannot show good aerodynamic performance, this affects the fuel economy of automobile to a certain extent.In order to change
It is apt to this problem, we redesign car body top cover using the method for " Bionic Design ".
Nature biotechnology passes through evolution in 1 years, has good adaptive capacity to environment, this is the innovation and creation of the mankind
Provide inspiration.Bionic Design can allow vehicle body to have more visual impact and aesthetic feeling, while the distance for the man and nature that enough furthered,
Getting along amiably and peacefully for man and nature has been annotated to a certain extent.Be known as the sparrow of titles in " native place thief " by it is prolonged it is biological into
Change can fly kind jump, be active in one's movements, research shows that certain geometry (Fig. 1) is presented in flight for its head.The present invention is herein
On the basis of by its head vertical section outer profile curve of least square fitting and design a kind of low with variable curvature characteristic
The car body top cover (Fig. 2) of coefficient of air resistance, at the same increase the streamlined of vehicle, sound insulation and noise reduction, air conducting, sight property,
The performances such as safety.
Invention content
The purpose of the invention is to overcome the deficiencies in the prior art, improve the fuel economy of automobile, provide a kind of knot
Structure is simple, moulding streamline, aesthetic in appearance, air resistance coefficient is small, " sparrow hair style " car body top cover of sound insulation and noise reduction --- and variable curvature is special
The biomimetic type automobile top cover outer plate of property.
The object of the present invention is achieved like this：When the automobile top cover outer plate vertical section directrix shape is circled in the air using sparrow
Head vertical section outer profile curve EF shapes；
Specifically manufacturing method is：
(1), head feature when sparrow circles in the air is recorded by high-speed camera, by the head feature of record by optimization
After reason, by head vertical section outer profile Drawing of Curve on graph paper.By data on graph paper after Least Square in Processing
Sparrow head vertical section outer profile curvilinear equation 1-1 is fitted, following formula is referred to：
(2), sparrow head vertical section outer profile curvilinear equation 1-1 is imported into SolidWorks and is recorded with high-speed camera
Head feature when sparrow circles in the air carries out comparison optimization, it is ensured that fitting precision, the fitting number used is three times；
(3), outer profile curvilinear equation is drawn in SolidWorks (Fig. 6) after optimizing comparison, and is painted in corresponding position
Koji-making line LM, NP, ST, curve LM, NP, ST are arc structure, and design parameter is as follows：
The parameter of circular arc LM is：Central coordinate of circle (0, -48), point L coordinate (- 60,143), point M coordinates (60,143), circular arc
Radius 240；
The parameter of circular arc NP is：Central coordinate of circle (0.00,232), point N (- 55., 6), point P (55,6), arc radius 230；
The parameter of circular arc ST is：Central coordinate of circle (0, -241), point S coordinates (- 61, -7), point T coordinates (61, -7), circular arc half
Diameter 240；
(4), after curve LM, NP, ST, EF completes, using curve LM, NP, ST as contour line, curve EF is guide line
Curved surface setting-out is carried out, setting-out rear curved surface is subjected to thickening processing, thickness 1mm；
(5), in order to further decrease the air resistance coefficient of car body top cover, fillet processing, circle are carried out to the head cover after thickening
The size at angle can be determined according to requirements according to different automobile types, obtain automobile top cover outer plate shown in Fig. 2.
It advantages of the present invention and has the technical effect that：
(1) the present invention relates to a kind of car body top cover outside plate of biomimetic type variable curvature characteristic, car body top cover can be specifically expressed as
Design inspiration derive from sparrow head.The design has abandoned traditional " bluff-body type " design of cover.
(2) variable curvature head cover outside plate of the present invention uses Bionic Design theory.There to be good aerodynamics
The sparrow head vertical section outer profile curve of characteristic is used for the design of car body top cover vertical section directrix.Car body top cover vertical section directrix
EF equations are shown in that formula 1-1, directrix and form for curvature are as shown in Figure 3.
(3) after there is car body top cover outside plate of the present invention vertical section directrix variable curvature characteristic, curvature first increase is presented
Become smaller and increased trend (Fig. 3)；Sideline LM, NP, ST are to determine curvature circular arc, and amount of curvature is the inverse of radius.This is certain
Not only the fuel economy of automobile had been taken into account in degree, but also reduced technology difficulty coefficient.
The parameter of circular arc LM is：Central coordinate of circle (0, -48), point L coordinate (- 60,143), point M coordinates (60,143), circular arc
Radius 240.
The parameter of circular arc NP is：Central coordinate of circle (0.00,232), point N (- 55., 6), point P (55,6), arc radius 230.
The parameter of circular arc ST is：Central coordinate of circle (0, -241), point S coordinates (- 61, -7), point T coordinates (61, -7), circular arc half
Diameter 240.
(4) curved surface is that circular curve LM, NP, ST are formed along biomimetic type guide line setting-out, curved surface knot made of setting-out
Structure is simple, moulding streamline, aesthetic in appearance, air resistance coefficient is small, air conducting is good.
(5) the biomimetic type car body top cover thickness involved by is 1mm, and tetra- jiaos of L, M, S, T carries out fillet design (Fig. 4), add
Curved surface after thickness carries out fillet processing, and the size of fillet can be determined according to requirements according to different automobile types, and the purpose is to further decrease
The air resistance coefficient of car body top cover.
(6) carbon fibre material can be used in body of a motor car head cover outside plate.It replaces passing with carbon fiber enhancement resin base composite material
The car body top cover steel plate of system can effectively reduce vehicle body total quality.Length-width ratio, thickness, windward angle, the parameter constants such as cut angle
Under the premise of, the laying angular arrangements of three layers of fibrous layer from top to bottom are [90/45/0] (Fig. 5), wherein 0 degree of direction is that head cover is horizontal
To.The purpose for selecting such ply stacking-sequence mainly considers bending stiffness, torsion stiffness and Modal Performances of car body top cover etc..
Studies have shown that when fibrous layer wing flapping is larger, car body top cover outside plate bending stiffness is big, modal frequency is high；When wing flapping is smaller
When, car body top cover outside plate torsion stiffness is big；Single laying is generally preferred over using the performance of mixing laying；Carbon fiber ply stacking-sequence pair
Bending stiffness, torsion stiffness and the modal frequency of car body top cover outside plate influence unobvious.
(7) bio-based materials also can be used in the outer plate material of body of a motor car head cover, hemp, sisal hemp, jute in plant fiber,
It is extraordinary reinforcing material that palm fibre, which puts leaf and bamboo fibre etc., they are combined with degradable basis material, and can be made into can be degradable
" Green Composites ".Steel plate outside traditional bonnet is replaced with bio-based materials, can make automobile more green, environmental protection.
Biology base raw material can derive from the plant fibers such as fruit, soya bean, sugarcane, sweet potato, corn, bamboo, flax of plant.
(8) bonnet processing technology can be used traditional Sheet Metal Forming Technology and 3D printing technique also can be used.
(9) biomimetic type body of a motor car head cover outside plate according to the present invention can be as needed to sparrow head vertical section foreign steamer
Wide curve is stretched, is stretched, and to design various sizes of biomimetic type car body top cover, meets the needs of different automobile types.
(10) present invention is biomimetic type car body top cover outside plate, preferably to driver's cabin and can drive indoor member
To, protect, tetra-inclusion complex, while it is heat-insulated, soundproof effect is more preferable.
Description of the drawings
Head state figure when Fig. 1 is sparrow flight.
Fig. 2 is the biomimetic type automobile top cover outer plate structure chart of the present invention.
Fig. 3 is the sparrow head vertical section inside and outside contour curve and its Curvature varying form figure after fitting.
Fig. 4 is the biomimetic type car body top cover outside plate figure of final molding.
Fig. 5 is that the fiber of automobile head cover is paved into precedence diagram.
Fig. 6 is the vertical section directrix form figure of biomimetic type automobile head cover.
Specific embodiment
It is as follows that the present invention relates to specific embodiments：
(1), head feature when sparrow circles in the air is recorded by high-speed camera, by the head feature of record by optimization
After reason, by head vertical section outer profile Drawing of Curve on graph paper.By data on graph paper after Least Square in Processing
Sparrow head vertical section outer profile curvilinear equation 1-1 is fitted, following formula is referred to：
(2), sparrow head vertical section outer profile curvilinear equation 1-1 is imported into SolidWorks and is recorded with high-speed camera
Head feature when sparrow circles in the air carries out comparison optimization, it is ensured that fitting precision, the fitting number used is three times；
(3), outer profile curvilinear equation is drawn in SolidWorks (Fig. 6) after optimizing comparison, and is painted in corresponding position
Koji-making line LM, NP, ST, curve LM, NP, ST are arc structure, and design parameter is as follows：
The parameter of circular arc LM is：Central coordinate of circle (0, -48), point L coordinate (- 60,143), point M coordinates (60,143), circular arc
Radius 240；
The parameter of circular arc NP is：Central coordinate of circle (0.00,232), point N (- 55., 6), point P (55,6), arc radius 230；
The parameter of circular arc ST is：Central coordinate of circle (0, -241), point S coordinates (- 61, -7), point T coordinates (61, -7), circular arc half
Diameter 240；
(4), after curve LM, NP, ST, EF completes, using curve LM, NP, ST as contour line, curve EF is guide line
Curved surface setting-out is carried out, setting-out rear curved surface is subjected to thickening processing, thickness 1mm；
(5), in order to further decrease the air resistance coefficient of car body top cover, fillet processing, circle are carried out to the head cover after thickening
The size at angle can be determined according to requirements according to different automobile types, obtain automobile top cover outer plate shown in Fig. 2.
The present invention has abandoned traditional automobile top cover outer plate, and it is lighter to use lower maintenance cost, safety higher, quality instead
Biomimetic type car body top cover.Biomimetic type car body top cover according to the present invention can be as needed to sparrow head vertical section outer profile song
Line is stretched, is stretched, and to design various sizes of biomimetic type car body top cover, meets the needs of different automobile types.
Claims (1)
1. a kind of biomimetic type automobile top cover outer plate with variable curvature characteristic, it is characterised in that：The automobile top cover outer plate vertical profile
Head vertical section outer profile curve EF shapes when face directrix shape is circled in the air using sparrow；
Specifically manufacturing method is：
(1), head feature when sparrow circles in the air is recorded by high-speed camera, the head vertical section outer profile curve of record is special
Sign is drawn on after optimization processing on graph paper；Data on graph paper are fitted into sparrow after Least Square in Processing again
Head vertical section outer profile curvilinear equation 1-1, refers to following formula：
(2), the fiber crops that sparrow head vertical section outer profile curvilinear equation 1-1 is imported SolidWorks and recorded with high-speed camera
Head feature when sparrow circles in the air carries out comparison optimization, it is ensured that fitting precision, the fitting number used is three times；
(3), the outer profile curvilinear equation after optimizing comparison is drawn in SolidWorks, and draws curve in corresponding position
LM, NP, ST, curve LM, NP, ST are arc structure, and design parameter is as follows：
The parameter of circular arc LM is：Central coordinate of circle (0, -48), point L coordinate (- 60,143), point M coordinates (60,143), arc radius
240；
The parameter of circular arc NP is：Central coordinate of circle (0.00,232), point N (- 55,6), point P (55,6), arc radius 230；
The parameter of circular arc ST is：Central coordinate of circle (0, -241), point S coordinates (- 61, -7), point T coordinates (61, -7), arc radius
240；
(4), after curve LM, NP, ST, EF completes, using curve LM, NP, ST as contour line, curve EF carries out for guide line
Setting-out rear curved surface is carried out thickening processing, thickness 1mm by curved surface setting-out；
(5), in order to further decrease the air resistance coefficient of car body top cover, fillet processing is carried out to the head cover after thickening, fillet
Size can be determined according to requirements according to different automobile types, obtain automobile top cover outer plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610891211.8A CN106394693B (en) | 2016-10-12 | 2016-10-12 | A kind of bionical automobile top cover outer plate with variable curvature characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610891211.8A CN106394693B (en) | 2016-10-12 | 2016-10-12 | A kind of bionical automobile top cover outer plate with variable curvature characteristic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106394693A CN106394693A (en) | 2017-02-15 |
| CN106394693B true CN106394693B (en) | 2018-07-24 |
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| CN201610891211.8A Expired - Fee Related CN106394693B (en) | 2016-10-12 | 2016-10-12 | A kind of bionical automobile top cover outer plate with variable curvature characteristic |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115371623B (en) * | 2022-08-25 | 2023-08-01 | 重庆大学 | Shaft straightness error assessment method and system based on improved sparrow optimization algorithm |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201329905Y (en) * | 2008-12-18 | 2009-10-21 | 比亚迪股份有限公司 | Strengthening structure of vehicle head cover |
| CN202219801U (en) * | 2011-09-15 | 2012-05-16 | 重庆长安汽车股份有限公司 | Automobile top cover |
| CN202499188U (en) * | 2012-02-22 | 2012-10-24 | 北汽福田汽车股份有限公司 | Top cover shell plate of automobile |
| CN103958328A (en) * | 2011-11-22 | 2014-07-30 | 戴姆勒股份公司 | Light-weight construction element for a vehicle body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5446853B2 (en) * | 2009-12-25 | 2014-03-19 | トヨタ自動車株式会社 | Body superstructure |
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2016
- 2016-10-12 CN CN201610891211.8A patent/CN106394693B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201329905Y (en) * | 2008-12-18 | 2009-10-21 | 比亚迪股份有限公司 | Strengthening structure of vehicle head cover |
| CN202219801U (en) * | 2011-09-15 | 2012-05-16 | 重庆长安汽车股份有限公司 | Automobile top cover |
| CN103958328A (en) * | 2011-11-22 | 2014-07-30 | 戴姆勒股份公司 | Light-weight construction element for a vehicle body |
| CN202499188U (en) * | 2012-02-22 | 2012-10-24 | 北汽福田汽车股份有限公司 | Top cover shell plate of automobile |
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| CN106394693A (en) | 2017-02-15 |
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