CN102372043A - Method for assessing structural design of ring path vehicle body - Google Patents
Method for assessing structural design of ring path vehicle body Download PDFInfo
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- CN102372043A CN102372043A CN2011102232955A CN201110223295A CN102372043A CN 102372043 A CN102372043 A CN 102372043A CN 2011102232955 A CN2011102232955 A CN 2011102232955A CN 201110223295 A CN201110223295 A CN 201110223295A CN 102372043 A CN102372043 A CN 102372043A
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Abstract
The invention discloses a method for assessing a structural design of a ring path vehicle body, which comprises the following basic steps of: assessing an ideal strength grade and a structure performance of a Ring material, assessing structural characteristics and substantial requirements of the Ring material; assessing an actual strength grade of the Ring material and assessing the Ring material comprehensively. The method is an independent and direct assessing method which exceeds the simulation and experiments, and has the advantages of being capable of reducing the generation of design defects and repeatability between unnecessary designs and verifications, reducing development cost, and shortening design period. Meanwhile, the method has universality and is disclosed by aiming at an engineering structure design of the vehicle body, and is simultaneously suitable for the assessment of the structural design of the non-ring path vehicle body, thereby having important theory and practice significances on the structural design of the vehicle body.
Description
Technical field
The present invention relates to a kind of body structure design evaluation method, especially relate in the automotive engineering development process body structure design-calculated is assessed.
Background technology
Technical background of the present invention is to propose a kind of cyclic path body structure design theory and method; Promptly from the body structure of each a large amount of vehicle of main engine plants, extract the common trait of body drawing; Absorb the outstanding gene of each main engine plants in the body structure design; According to common trait and the outstanding gene of body drawing that facts have proved, set up unified body structure design theory and the method for a cover, to satisfy higher collision laws and regulations requirement; And adaptation body lightening designing requirement; For the application of the inventive method provides objective for implementation and target, the document of reference of the present invention is the vehicle body keynote speech of each main engine plants of 2002-2010 Europe body in white meeting (Euro-Car-Body is called for short ECB).
Undoubtedly; Various legislative control on safetys have promoted the raising of body structure design level, and wherein design has proposed challenge to the NCAP system because its higher collision velocity is to body structure, but along with each main engine plants is constantly perfect to application, the vehicle platform truck body structure design-calculated of new material new process; It is more and more to reach five-pointed star standard vehicle; A little less than the differentiation effect more and more of NCAP to automotive safety, therefore, improving safety rate is a kind of potential trend.Along with legislative control on safety is increasingly high; The customer becomes the vital factor that it purchases car to the consideration of automotive crash safety; Main engine plants to the consideration of vehicle body collision safety from design, emulation, experiment, all center on it to each link of producing and launch as emphasis; Therefore, the exploitation of vehicle body collision safety performance is one of core content of automobile research and development.
At the coach work design phase, body lightening design basic ideas be keep existing body structure design collision safety performance and rigidity property not the degree of variation or variation within tolerance interval, i.e. " structure Pareto principle of design "; Propose concrete loss of weight target, body structure is optimized design, at this moment; Collision safety performance and rigidity property are afoul often; On the one hand, security-related structure is not necessarily relevant with rigidity, and the structure relevant with rigidity is not necessarily security-related; Because the limitation of specialty; The engineer more is that the professional angle that stands in self considers a problem, and lacks the visual angle of a performance balance, is difficult to the scheme that proposes to take into account; On the other hand, traditional body structure lacks a kind of method of designing of taking into account and thinking to collision safety performance and rigidity property, therefore, is the departure point that proposes the theoretical and method of cyclic path body drawing to the thinking of performance collision problem in the light-weight design.
At present, the challenge of body structure design-calculated is the conflict property between its target---in the requirement of satisfying the high standard legislative control on safety, possess under the prerequisite of traveling comfort and road-holding property preferably, carry out the body lightening design.In ECB2003, Ford proposes " The target to develop a stiffand safe body structure for the Focus C-Max (purpose is to develop a kind of body structure with high rigidity and high security for Fox C-Max) " in the new Fox C-Max of its vehicle introduces; In ECB2008, HONDA requires to propose 3 points: Handingand Comfort (road-holding property and traveling comfort) with regard to white body performance in its vehicle NewJAZZ introduces; Safety (safety); Achievement of Weight Reduction (weight loss effect); " stiff " of " Handing and Comfort " and Ford indication wherein; One be the fruit one be because of, be the different formulations of same performance, and " Achievement of Weight Reduction " is meant light-weight design; Summarizing with a speech is exactly " save ", saves quality, saves cost.Simultaneously, the vehicle body endurance quality is as one of important investigation point of body structure design-calculated, with rigidity property be same in essence, the good more vehicle body durability of body stiffness is good more, is a performance of rigidity intension, does a performance and handles.Therefore, based on this body structure design-calculated " 3S-Tsrgets (3S target) ", i.e. " Stiff (high rigidity) ", " Safe (high safety) ", " Save (lightweight) " are proposed.
Vehicle body collision safety design concept; Simplified summary is " collapse energy-absorption, a dispersion load "; Leader Volvo by safe design proposes the earliest; Concrete designing requirement is " the abundant collapse energy-absorption of front deck, crew module are kept perfectly ", has become the departure point that each main engine plants of the whole world carry out vehicle body collision safety structure design.According to laws and regulations requirement, under the certain situation of energy, such as central collision; Undoubtedly the dummy can not absorb energy, and body tail can not absorb energy, and the crew module can not absorb energy; Can make the dummy lose living space, obviously, can only be that front deck absorbs energy; Problem is how to let front deck absorb more collision energy, how to protect crew module's integraty as much as possible, and this is the problem of " The Eight Immortals cross the sea, and each show his special prowess "; Do not have the problem of whose good whose difference in the concrete structure design, finally provide answer by the dummy.
From ECB material over the years, what clearly propose its vehicle body collision safety structure has Audi, HONDA, a Nissan, proposes the Toyota that has of security concept, below the vehicle body collision safety structure and the notion of each main engine plants is done a brief account.
In ECB2003; Audi has represented its exclusive " Audi Space Frame (the Audi space frame structure is called for short ASF) " body structure in its vehicle A8 introduces; From its disclosed material analysis; In fact ASF is meant the general frame structure that body framwork is formed, and notable attribute is: the A post extends to the C column joint always, and threshold brace panel structure is across front and back door.ASF bodywork parts number is few; Riveted joint (riveting) mode is firm, through constantly improving, in ECB2010; The torsional stiffness of all-aluminium body Audi New A8 has reached the high-level numerical value of 37.6kNm/, and this vehicle has obtained European best body in white design Grand Prix in 2010.
In ECB2005; HONDA in its vehicle New CIVIC introduces, proposed " ACE body structure (Advanced Compatibility Engineering): Efficient light weight body structure for frontal impact and compatibility; Purpose of ACE:increase self-protection performance and reduce aggressiveness to other vehicle; Functionality:load dispersion, preventing misalignment with other vehicles side frame, Achieving highly efficient energy absorption " (ACE body structure (advanced compatible property engineering) is an actv. lightweight body structure for preceding collision and collision compatibility; The purpose of ACE is to increase autoprotection performance and the invasive that reduces other car load; Basic function is the dispersion impact load, prevents to collide incompatible side frame shelf structure between the vehicle, absorb more collision energy).The technological advance of the ACE structure of HONDA is front side member and last longeron have been connected into an integral body, on many cars, all has similar connection processing, its advantage of bringing to be not only on the safety in fact, to improving lateral rigidity, torsional stiffness no less important.
In ECB2006; Nissan is in its vehicle NOTE introduces; " Advanced Zone Body Concept (premium area vehicle body notion) " proposed; As " Crushable zone (but crushed areas) ", the emphasis of structure design is " Front absorber energy-Ring (a preceding energy-absorbing ring) " with front deck, fully the absorbing impact energy; As " Safety zone (safety zone) ", the emphasis of structure design is " Front floor-Ring (a noseplate ring) " with the crew module, protection crew module's integraty.The basic ideas of " Advanced Zone Body Concept " are according to collision safety design-calculated theory body structure to be divided into two different zones, and formulate the structure design countermeasure according to the requirement of its function.In ECB over the years, be more common according to the requirement of colliding to the division that body structure carries out zones of different, as in the Ford vehicle, being divided into three zones, in AudiA6, be divided into five zones.
In ECB2008; Toyota is in its vehicle NewAVENSIS introduces; Introduced its GOA that proposes already (Global Outstanding Assessment) notion all-sidely---" Cars that protect occupants (protection occupant's automobile) "; Comprise three aspects: " high integrity cabin, effective energy absorption, omni-directional compatibility performance " (crew module's high integrality, effective absorbing impact energy, omnibearing compatible performance); Its objective is " reducing the suffered impact of occupant " also " protection crew module integraty "; From a structural point, GOA is strange, can't corresponding its exclusive body structure characteristic; From conceptive, GOA is familiar with, and has pointed to the structure design theory of collision safety.But from customer's angle, can not close thing concrete on the core structure, but only be concerned about the safety that can protect the occupant, therefore, GOA is not the success of body structure design-calculated, but the success of marketing concept.
" Ring-shaped (ring-type; abbreviate ' Ring ' as) " structure is ignored by each main engine plants the influence of vehicle body collision safety performance for a long time; From the angle of collision safety " Ring " structure design and material design-calculated number of times and few are proposed; Ring security-related among the ECB over the years is enumerated: in ECB2002, Ford the past collision angle in its vehicle Fiesta introduces has proposed " continuous ring around front door opening (continuous loop of opening around the Qianmen) "; In ECB2003, Reynolds is collision and side collision angle proposition " ring side body reinforcement (gusset ring stiffener) " in the past in its vehicle SCENIC2 introduces; In ECB2005, Sa Bo has proposed " C-Ring (the C band of column) " and " D-Ring (the D band of column) " from roof resistance to compression angle in its vehicle 9-3Sport Combi introduces; In ECB2005, HONDA the past collision angle in its vehicle New CIVIC introduces has proposed " consolidatedfront floor frame (crash-resistant noseplate framed structure) "; In ECB2010, HONDA has indicated " B-Ring (the B band of column) " from the side collision angle in its vehicle CR-Z introduces.We can say that the inner link of ignoring " Ring " architectural feature and collision safety is to produce collision safety performance and the afoul basic reason of rigidity property in the light-weight design.
Ride of vehicle, road-holding property, steering flexibility depend primarily on the integral rigidity index of vehicle body; Like torsional stiffness, bending stiffness and lateral rigidity; Wherein torsional stiffness plays a decisive role, and is one of key parameter in the body lightening coefficient calculations.Generally speaking, if body torsional rigdity is not enough, under the impact loading of chassis; Can cause the vehicle body torsional deflection excessive, make and reduce the vehicle body durability by vehicle body chamfering place stress concentration; Crack; Simultaneously, cause between each parts and to interfere each other or parts take off and split, produce a series of problems such as vibration and noise.
In ECB material over the years, how improving body torsional rigdity is the emphasis of its introduction, and the outstanding effect measure can be classified as three types: the vehicle body joint connects improvement, particularly D column joint; Increasing the front shock absorber seat connects crossbeam or is improved to the closed cross-section connection; Structure is " Ring " structure vertically; Six vertical " Ring " all related in each main engine plants' report; Particularly Damper-Ring (bumper seat ring) and D-Ring (the D band of column); " Ring " of level mainly is Hood Opening-Ring (send out lid open ring), we can say, the generation of improving one's methods to the cyclic path vehicle body that improves torsional stiffness through " Ring " structure provides basis of reality; It is more rare how to improve being presented in each main engine plants' report of vehicle body pre-structure lateral rigidity, in the introduction of the ACE of Nissan vehicle TEANA and HONDA structure, has proposed to improve the effective measures of lateral rigidity---increase the connection structure of front side member and last longeron; How to improve the introduction of vehicle body bending stiffness and do not see basically, but the project organization that the front and back longeron connects obviously helps improving the vehicle body bending stiffness.
In ECB material over the years; Many main engine plants mention " Ring " structure that forms a part in its vehicle introduction have influence clearly to improving collision safety and torsional stiffness; But mainly be confined to a kind of local structure or local features; And the elaboration of system is not carried out to " Ring " structure in fragmentary each position that is distributed in vehicle body, does not recognize that " Ring " structure is as the influence of a kind of essential structure form of body structure design-calculated to body performance and light-weight design; The limitation that " Ring " that proposes just because of each main engine plants exists is for the generation of cyclic path vehicle body has improved the space.
According to the relevant data statistics, car weight saving 10%, oil consumption reduce 6%-8%, pick-up time minimizing 8%, quantity discharged minimizing 10%, stopping distance minimizing 5% or the like; Therefore, the automobile lightweight has very important significance to energy-conservation, reduction of discharging, synergy, simultaneously; Automobile need satisfy harsh day by day car load collision safety, environmental demands; The increasing traveling comfort of customer, reliability requirements have brought challenge for the automobile light-weight design, are the right problems of each main engine plants' demand side.
Steel are body structure design-calculated traditional materials, and along with the collision laws and regulations requirement is increasingly high, tare is in continuous increase; In order to reach the automobile lightweight and to satisfy the purpose of collision safety, the competition of reply vehicle body new material, the nineties in 20th century; IISI has carried out ultralight steel body (Ultra Light Steel Auto Body) ULSAB project; Its content is through a large amount of employing high tensile steel plates, and uses new moulding and welding process, like technology such as hydraulic forming, laser assembly solder plates; Make vehicle body loss of weight 25%, and make vehicle body static twist rigidity, safe star get a promotion.
For the traditional material vehicle body, the ratio that high strength has just been used constantly increases, and is the method that generally adopts in the light-weight design; Promptly under the prerequisite of guaranteed performance, with the big framing member of the high replacement intensity low weight in light weight of intensity, therefore; The emphasis of light-weight design still concentrates on the material, rather than structure, but in Japanese car; The ratio that high strength material uses is low, compares the material lightweight, and Japanese car is more paid attention to the structure design lightweight.
For the new material vehicle body, there is significant deficiency on the rigidity of structure because vehicle body metal panel beating is welded on through solder joint, and adopts new material to be more suitable for design in car body frame structure; The part number reduces in a large number; And it is more firm that riveted joint (Riveting) connects, and helps improving structural entity rigidity, therefore; The Audi body lightening is the result that aluminum alloy is used; Not equal to be the curve breakthrough on the structure design, say so more accurately material and the coefficient result of ASF structure, Lexus LFA carbon fibre reiforced plastic (CFRP) vehicle body is all the more so.
Traditional metal framework vehicle body adopts the high strength steel new process, all is set selection, and what determine body lightening is structure; Safety performance mainly is a structure problem, and next is only problem of materials, and rigidity is structure problem completely; Therefore, it is basic that light in structure quantizes, and the material lightweight is auxiliary; For the application of new material on vehicle body; The material lightweight is a structure weight-saving prerequisite; Or light in structure quantizes to be different from the manifestation of conventional confguration, and the new material vehicle body is not simple steel to be become new material, but has changed traditional body structure design simultaneously.
Body lightening is designed; Vehicle body adopts any material; Being that which type of material and technology goes to select, be a selection problem, and structure is in the design-calculated process, to need to consider the influence of material behavior to structure design; Making structure reach the best performance target, is an innovative problems.Giving full play to of material property depends on structure design; How bringing into play material property to a greater extent is one of body structure design-calculated important content; Therefore; Cyclic path vehicle body (Ring-shaped RouteBody) is a kind of set selection to traditional body material, can give full play to material property and reach the body structure method of designing optimal performance target, innovation.
ECB has provided " Total weight body-in-white " and has been defined as " Defined as Total weight body-in-white of the car body including doors and closures; as well as all parts that are fitted in the body shop; excluding paint. "; Body in white is meant " Total weight body-in-white without doors; closures and fenders (the full weight body in white that does not comprise car door, opening tool and fender guard) " among the present invention; Reject the cover panel of the low-intensity material that body in white adopted, be referred to as body framwork like remaining structures such as base plate, top cover, side-wall outer-plate, wheel covers.
The cyclic path vehicle body has been contained architectural feature (Ring), substantive (Route) and three aspects of performance objective (Resist) of requiring in terms of content; Initial letter according to its content; Further extract the notion of " 3R-BODY ", i.e. the English shorthand of " cyclic path vehicle body ".In fact the cyclic path vehicle body is meant body framwork, and " Ring " and " Route " is based on the vehicle body framework construction notion, and " Resist " is the effect that the cyclic path vehicle body can arrive.
" Ring " architectural feature is to be starting point with any joint of body framwork; Get back to starting point along a certain than short path, form " Ring-Shaped " structure one by one, ring can be the plane or the space; Can be circle or the side etc., key is to constitute a closed-loop.If " Ring " satisfies in form, do not form closed cross-section in the body framwork on " Ring " and adopt low-intensity material thickness to be less than or equal to the framing member of 1mm but reject, thereby can not form closed-loop, then do not constitute " Ring " architectural feature; Be evolved into the two parallel remotest places and form three-dimensional framed structure if in a ring, be divided into a limit of some annular sections or ring again, two kinds of forms are equivalent with original " Ring " on the effect, regard it as cyclic structure equally.
From the structure design angle; Space frame structure has extraordinary integral rigidity and compatibility of deformation ability; Realize the purpose of " the local pressure whole body is shared "; " Ring " structure is the desired characteristics that constitutes space frame structure, realizes the quick shunting of load, and particularly the design of fleetline body shape helps the expression of " Ring " architectural feature more.
" Route " is meant in the structural optional position of each sealing " Ring " that is made up of the panel beating welding all have certain sealing or semiclosed cross section; A little less than avoiding the abrupt change of cross-section or rigidity part excessively; In the time of design-calculated, need take into full account the limit and the junction, limit of " Ring " especially; On the loading transfer direction, guarantee that as much as possible dock fully in the cross section or part butt joint at least.
" Route " satisfies substance requirement---enclosed cross property or semiclosed property under the closed-loop condition at " Ring ", promptly guarantees the continuity of rigidity, substantive " Ring " system that requires then not belong to vehicle body of discontented foot.According to " Route " substantive requirement, " Ring " relevant with collision cross section requirement in principle is osed top, and closed cross-section is big as far as possible; " Ring " cross section relevant with rigidity can be semi-enclosed, but in body in white, can constitute the osed top cross section with the part of rejecting, and adopts the common intensity material to get final product.
Architectural feature that if body framwork has " Ring " as much as possible; And each " Ring " satisfies " Route " substantive requirement; Guarantee that promptly body in white has had desirable space frame structure; Adopt suitable material design according to performance objective, then the body in white structure will have that desirable vehicle body is antitorque, bending resistance, resistance to compression, non-deformability, i.e. " Resist " performance objective.
; " Ring " satisfied the architectural feature of space frame; " Route " proposed the substantive requirement of " Ring " architectural feature; Not equal to " Ring " and " Route " is the design considerations of cyclic path vehicle body, promptly the cyclic path vehicle body be based on to the most basic, set out by the understanding of extensively approval, and based on a kind of body structure design theory and the method for following 2 propositions.
The first, to traditional body material, 3R-BODY has constructed an actv. space frame structure through " Ring " architectural feature, realizes load transmission and dispersion rapidly, guarantees the integraty of crew module's living space; The new material vehicle body then globality through improving parts is connected technology and constructs a space frame structure with new.New material has remarkable advantages aspect the space frame structure constructing; The vehicle body amount of parts is compared traditional material and is obviously reduced; Connection mode is more effective, like the CFRP material vehicle body of Lexus LFA, need not through " Ring " just can be formed directly in the actv. space frame structure; And be to form the ideal structure characteristic that space frame structure can not get around for traditional material " Ring ", then very obvious like the design of VOLVO body structure by the space frame structure that " Ring " constitutes.
The second, according to " short slab is theoretical ", by the wooden barrel of many plank hoops one-tenth; Its amount of being filled with water is by wherein the shortest plank decision, and a large amount of engineering experiences shows that the body structure design meets " short slab is theoretical ", structural entity rigidity by the most weak rigidity decision on " Route " or be one of important factor in order at least; According to " short slab is theoretical "; The rigidity that improves non-weakness can effectively not increase rigidity that integral rigidity suitably reduces non-weakness in other words can appreciable impact structural entity rigidity, and therefore, effective method is to catch " short slab "; The lifting of obtaining maximum performance with the cost of minimum is for the 3R-BODY light-weight design provides foundation.
Therefore, " Ring " and " Route " also is the basic foundation of 3R-BODY structure design when constituting 3R-BODY structure design key element.
Vehicle body safety performance and rigidity property key for design are the body framwork designs; And the body framwork key for design is whether to form a single-piece car body frame structure; 3R-BODY adopts " Ring " as car body frame structure design fundamental element; Regard body framwork as form framed structure, thereby reach the target that realizes the body structure performance design, therefore by " Ring " one by one; The 3R-BODY structure design is actually " Ring " structure design, introduces one by one respectively in the face of 16 " Ring " that relates to down.
Define three planes respectively according to the car load system of axes: perpendicular to the X-Surface of X axle, perpendicular to the Y-Surface of Y axle, perpendicular to the Z-Surface of Z axle; " Ring " that constitute body framwork carried out projection near parallel face with it in three planes; Thereby " Ring " is divided into three major types: perpendicular to " Ring " of X axle, perpendicular to " Ring " of Y axle, perpendicular to " Ring " of Z axle, below to " Ring " respectively from form, material (the strength of material classification standard adopts the VOLVO material rate criteria for classifying), three aspects of function introduce.
Projection on perpendicular to the X-Surface plane of X axle, the cyclic structure of formation, from body forward structure to the rear portion, called after: Front-Ring (headring), A-Ring (the A band of column), B-Ring, C-Ring, Damper-Ring, six of D-Ring " Ring " respectively.
1, Front-Ring: be connected in sequence by water tank entablatrance, preceding ring left side connection support, water tank cross sill, the right support that connects of preceding ring, for closed subframe, the water tank cross sill is then replaced by good fortune driving skills front cross rail.Front ring has certain influence (Less Important) to improving preceding collision performance, torsional stiffness and further improving the body forward structure lateral rigidity; Because it is to improve the vehicle body lateral rigidity that Front ring mainly acts on; Less, therefore, lower to the collision Effect on Performance to its material requirements; Adopt Mild Steel (MS, ordinary steel) to get final product.
2, A-Ring: connected successively by left side A column joint, windscreen cross sill, the right A column joint, the right hinge pillar, middle passage crossbeam, left side hinge pillar and to combine, the description to A-Ring in the The Ring-Shaped of Subaru (Subaru) Reinforcement Frame body structure (ring-type strengthens the chassis body structure) is " The A-pillars and the front firewall structure make up one ring (left and right sides A post and front apron structure have been formed a ring) ".For most of styling designs; A-Ring exists basically; This ring is and one " Ring " of preceding collision safety and Performance Evaluation thereof extremely important (Very Important) that the connection of A column joint, hinge pillar and the design of middle passage beam structure and strength of material design are all extremely important concerning preceding collision, generally need to adopt very high strength steel (VHSS; The higher-strength steel) and high strength steel (HSS; High strength steel), the design of A-Ring has the effect of extremely important (Very Important) to transmitting and disperseing side collision load to have certain function to the raising torsional stiffness.
3, B-Ring: be connected in sequence by left side B column joint, top cover middle beam, the right B column joint, the right B post, seat after cross member, left side B post, the description to B-Ring evolution form in the The of Subaru Ring-Shaped Reinforcement Frame body structure is " Both B-pillars along with two structural frame members in the floorboard and two specially shaped structural members running across the roof area make up the center ring (left and right sides B post, floor beam, roof panel cross member have been formed adapter ring) ".Design for body structure; B-Ring is absolutely necessary; The person can not cause serious design defect; This ring is and one " Ring " of side collision safety and Performance Evaluation thereof, roof resistance to compression most important (Essential Important), and preceding collision is had certain influence (Less Important), and the link of B-joint, B-pillar structure design and strength of material are all most important concerning preceding collision; B-pillar additional strengthening, top cover middle beam material generally need adopt ultra high strength steel (UHSS; Extra-high tensile steel), seat after cross member material generally need adopt VHSS, and the B-Ring joint connects the effect that the raising torsional stiffness is had extremely important (Very Important).
4, C-Ring: be connected in sequence by left side C column joint, roof panel cross member, the right C column joint, the right C post, noseplate after cross member, left side C post; Description to C-Ring in the The of Subaru Ring-Shaped Reinforcement Frame body structure is " The third ring is formed by the C-pillars and a strengthened lower rocker sill area (the 3rd ring is made up of the following door sill area of left and right sides C post and enhancing) "; This ring offside collision safety, roof resistance to compression, after bumped certain influence (Less Important); The effect that the raising torsional stiffness is had extremely important (Very Important); Therefore, the link of C column joint is very important.Because be not so good as B-Ring with the correlativity of safety performance, C-Ring additional strengthening material generally adopts HSS can satisfy the collision requirement.
5, Damper-Ring: be connected in sequence by left side shock absorber bearing support, roof panel cross member or package shelf crossbeam, the right shock absorber bearing support, back floor beam; Because this ring has the effect of extremely important (Very Important) to the raising body torsional rigdity; At present, many vehicles have adopted the Damper-Ring design mostly for improving torsional stiffness, simultaneously; Because the unicity of this ring function, Damper-Ring additional strengthening material generally adopts MS to get final product.
6, D-Ring: be connected in sequence by left side D column joint, top cover after cross member, the right D column joint, the right D post, boot crossbeam, left side D post; Be one of six " Ring " relevant with opening tool, also be referred to as Tailgate Opening-Ring (boot is opened ring), because this ring has the effect of extremely important (Very Important) to the raising body torsional rigdity; Wherein the D column joint is very important; At present, many vehicles have adopted the D-Ring design mostly for improving torsional stiffness, simultaneously; D-Ring to the roof resistance to compression, after bump performance certain influence (Less Important) arranged, general D-Ring additional strengthening material adopts HSS.
Projection on perpendicular to the X-Surface plane of Y axle; The cyclic structure that forms for a side of vehicle body; By name respectively: Front Door Opening-Ring (ring is opened at the Qianmen), Rear Door Opening-Ring (ring is opened at the back door) two " Ring " because symmetry, about each two.
7, Front Door Opening-Ring: be connected in sequence by A column joint, A post, B column joint, B post, front door sill brace panel, hinge pillar additional strengthening; Design for body structure; Front Door Opening-Ring is absolutely necessary; The person can not cause serious design defect, and this ring is most important (Essential Important) to preceding collision, offside collision safety and Performance Evaluation thereof, roof resistance to compression extremely important (Very Important); Be one of influence unlatching performance six " Ring "; The evaluation of the amount of moving direct relation crew module integraty behind its A post will be avoided the defective that designs, and the connection of A column joint, B column joint, the structure design that encircles each limit and strength of material are most important; A post, B post additional strengthening material generally need adopt UHSS; Front door sill brace panel, hinge pillar additional strengthening material generally need adopt extra high strength steel (EHSS, ultra-high-tensile steel), and Front Door Opening-Ring has certain influence (Less Important) to torsional stiffness.
8, Rear Door Opening-Ring: be connected in sequence by brace panel, B post behind B column joint, top cover side bar, C column joint, C post, the threshold; This ring is one extremely important (Very Important) " Ring " for side collision safety and Performance Evaluation thereof, roof resistance to compression; Be one of six " Ring " of the unlatching performance of influence door; The connection of B column joint, C column joint, the structure design that encircles each limit and strength of material are extremely important; B post additional strengthening material generally need adopt UHSS; The brace panel material generally need adopt EHSS or VHSS behind top cover side bar, the threshold, Rear Door Opening-Ring to torsional stiffness, after bump and certain influence all arranged (Less Important).
Projection on perpendicular to the X-Surface plane of Z axle; Bottom for vehicle body; The cyclic structure that in the past forms backward, by name respectively: Front absorber energy-Ring (preceding energy-absorbing ring), Front floor-Ring (noseplate ring), Fuel Tank-Ring (fuel tank ring), Rear absorber energy-Ring (back energy-absorbing ring) be totally four " Ring ".
9, Front absorber energy-Ring: be connected in sequence by left front longeron, left energy-absorbing box, front bumper crossbeam, right energy-absorbing box, right front longeron, front apron crossbeam; This ring promotes the effect with most important (EssentialImportant) for preceding collision performance; The structure design and the strength of material that encircle each limit are extremely important, and front side member, energy-absorbing box structural materials generally need adopt VHSS absorbing impact energy, and front bumper beam structure material generally adopts UHSS; Guarantee not take place serious flexural deformation with the left side loading transfer to the right side; Front apron beam structure material generally adopts VHSS, keeps the stability of front side member conquassation distortion, reduces front apron intrusion amount; Simultaneously, Front absorber energy-Ring has certain influence (Less Important) to raising torsional stiffness, bending stiffness.
10, Front floor-Ring: be in turn connected to form a square framed structure by middle passage crossbeam, the right threshold additional strengthening, noseplate after cross member, left side threshold additional strengthening; By crossbeam before and after longeron under some the noseplates, the seat " Ring " zone is divided into formal some square zonules again, at least from the framed structure of a globality of formal formation.Front floor-Ring is absolutely necessary; The person can not cause serious design defect, is one most important (Essential Important) " Ring " for preceding collision, direct relation crew module's living space; It is non-deformable zone; Offside collision safety extremely important (Very Important), to after bumped certain influence (Less Important), the connection of Liang Yuliang, the structure design that encircles each limit and strength of material are extremely important; Threshold brace panel structural materials generally need adopt EHSS; The girder work material generally need adopt EHSS or VHSS under the noseplate, and the crossbeam material generally need adopt HSS before and after the seat, and Front floor-Ring has the influence of extremely important (Very Important) to bending stiffness.
11, Fuel Tank-Ring: be connected in sequence by noseplate after cross member, right threshold brace panel, back floor beam, left-hand door sill brace panel; This ring is one extremely important (Very Important) " Ring " for back collision safety and Performance Evaluation thereof; Beam structure design and strength of material are extremely important; Crossbeam additional strengthening material generally need adopt VHSS, and Fuel Tank-Ring all has certain influence (Less Important) to torsional stiffness, bending stiffness, side collision.
12, Rear absorber energy-Ring: be connected in sequence by back floor beam, right back longeron, right energy-absorbing box, rear bumper arm crossbeam, left energy-absorbing box, left back longeron; With Front absorber energy-Ring design goal is the same; Abundant absorbing impact energy; This ring promotes the effect with most important (Essential Important) for the back collision performance, and the structure design and the strength of material that encircle each limit are extremely important, and floor side member, energy-absorbing box material generally need adopt VHSS absorbing impact energy; Rear bumper arm crossbeam material generally adopts EHSS; Guarantee not take place serious flexural deformation with the left side loading transfer to the right side, keep the stability of floor side member conquassation distortion, back floor beam material generally adopts VHSS; Simultaneously, Rear absorber energy-Ring has certain influence (Less Important) to improving torsional stiffness and bending stiffness.
Projection on perpendicular to the X-Surface plane of Z axle; Top for vehicle body; The cyclic structure that in the past forms backward, by name respectively: Hood Opening-Ring (send out lid and open ring), Shotgun-Ring (going up the longeron ring), Windshied Opening-Ring (front windshield is opened ring), Roof-Ring (top cover ring) be totally four " Ring ".
13, Hood Opening-Ring: by the water tank entablatrance, send out lid and open ring right support, upper right longeron, right A column joint, front windshield cross sill, left A column joint, upper left longeron, send out lid and open a ring left socle and be connected in sequence; Be one comparatively ubiquitous " Ring "; Be one of influence unlatching performance six " Ring "; Send out lid and open the key feature that ring support is this ring of design, require to adopt the osed top cross section to connect.This ring has certain influence (Less Important) to promoting the stability that goes up the longeron distortion in the preceding collision; This ring junction structure design is very important; Torsional stiffness there is the influence of extremely important (Very Important); Side direction rigidity there is certain influence (Less Important),, encircles each limit structural materials and adopt HSS and MS to get final product because the collision safety correlativity is not high.
14, Shotgun-Ring: be connected in sequence by last longeron ring support, front side member, A column joint, last longeron; Be one comparatively ubiquitous " Ring "; Last longeron ring support is the key feature of this ring of design, requires to adopt the osed top cross section, connects front side member and last longeron.This ring is to improving the conquassation deformation stability, disperseing impact load in advance in the preceding collision; Improve torsional stiffness and lateral rigidity certain influence (Less Important) is all arranged; Simultaneously; Excite acceleration/accel, the distortion of low speed collision minimizing front side member to have vital function to improving safety air bag, last longeron ring support structural materials adopts HSS to get final product.
15, Windshied Opening-Ring: be connected in sequence by left A column joint, front windshield cross sill, right A column joint, right A post, top cover front cross rail, left A post; Be one comparatively ubiquitous " Ring "; The front windshield cross sill is the key feature of this ring of design; From vehicle body band front windshield with not with the torsional stiffness result of the front windshield contrast, Windshied Opening-Ring has certain influence (Less Important) to torsional stiffness, in the roof resistance to compression of skylight version; Windshied Opening-Ring has positive role (Less Important), and structural materials adopts HSS or high strength more.
16, Roof-Ring: connect into " day " font or " order " font top cover mount structure by top cover front cross rail, top cover center member, top cover after cross member, top cover left side beam, top cover the right beam; Be one comparatively ubiquitous " Ring "; Its structure, material design in fact have been contained in other " Ring ", but convertible body structure design difficulty has proved absolutely the importance of Roof-Ring effect.
With the cyclic path vehicle body be from conceptive the most approaching body structure: Subaru from the angle of vehicle body collision safety propose " The Ring-Shaped Reinforcement Frame body structure---Essentially; the Ring Frame Reinforced structure forms a series of rings around the passenger compartment; providing excellent protection in a variety ofcollision types (ring-type reinforced frame body structure is actually by a series of rings around the crew module and constitutes; thus omnibearing outstanding protection is provided) "; To regarding as the classificating introduction of " Ring ", designing requirement, structural behaviour scope that the cyclic path vehicle body is comprised will be far above the latter from above.
With cyclic path vehicle body the most similar body structure on the structure be: the ASF chassis body structure of Audi; Both purposes all are to construct a chassis body structure; But because the difference of both body materials, the former is to traditional material, through general frame structure of " Ring " structure; And the latter is to aluminum alloy materials; Through general frame structure of connection mode structure of innovation,, produced bigger difference in concrete body structure design, manufacturing approach just because of the difference of material with high rigidity.
At the vehicle body conceptual phase; 3R-BODY has realized unification with structural collision safety performance and structure NVH performance on structure design; Dissolved two kinds of performances in the issuable conflict of project engineering stage, avoided big design modification, carrying out positive development for body structure design provides methodology; Thereby lay a good foundation for " 3S " target that realizes body drawing, its innovation is embodied in following three aspects:
The one; Theory innovation: 3R-BODY structural design theory and method have been set up an integral framework from design concept, principle of design, method of designing to recruitment evaluation (appraisal procedure of the present invention); Its theory innovation is mainly reflected in two aspects: the one; Local afoul safety performance and the rigidity property of bumping in traditional vehicle body light-weight design is fused in the middle of the common trait of vehicle body " Ring " structure design, proposed to take into account the construction design method that both unitarities are got in touch; The 2nd; Body structure design and material design are fused in the middle of " Ring " structural design features; Improved understanding to both interrelations; And both status and effects in light-weight design, 3R-BODY structural design theory and method have been set up for coach work design and have been instructed clearly and mentality of designing.
The 2nd; Technology innovation: 3R-BODY structural design theory and method are refined and have been absorbed the separately outstanding gene of each main engine plants in the body structure light-weight design; Be systematic generalization and summary to existing method of designing; Its technology innovation is mainly reflected in two aspects: the one,, " Ring " refined the structural design features for the basis, set up " Ring " system of system to body framwork; Spelt out the requirement of " Ring " structure Design, on assurance emphasis ring design-calculated basis, designed more ring structure according to the weight-saving needs; The 2nd; Design based on cyclic structure; Set up independence and be ahead of emulation and the structural appraisal method system that the coach work design effect is assessed of experiment, practiced thrift the development time, therefore; The bright spot of 3R-BODY structural design theory and method and technology innovation is that design is made clear and assessed can execution, and project engineering stage is had important practical advice meaning.
The 3rd,, Marketing Innovation: 3R-BODY structural design theory and method summary with refined " 3S " target of coach work design-calculated " Safe, Stiff, Save " for a long time, " 3R " structure of " Ring, Route, Resist " has been proposed to this target; Corresponding with " 3S ", " 3S " target and " 3R " structure are visual and understandable on the security concept, very clear on safeguard construction, and 3R-BODY itself has had unified double-deck identity--security concept and safety image; Therefore; In " security concepts " more and more deep today, the customer is partial to accept security concept, rather than safeguard construction; But the acceptable effect of security concepts depends on the concrete safeguard construction to a great extent; This structure image will be easy to let the customer form a kind of comparatively concrete influence, therefore, the marketing on 3R-BODY as combining propaganda in a kind of innovation design idea in passive security field and the concrete structure of automobile product; Be easy to accepted by the customer; Deepen the customer safety of products is familiar with, we can say, it itself is a kind of visualization that the Marketing Innovation of 3R-BODY is, vivid and substantial collision safety design concept.
Summary of the invention
1, technical matters to be solved by this invention
To deficiency of the prior art; Technical matters to be solved by this invention is: in traditional body structure engineering development; Appraisal procedure to structural behaviour mainly depends on emulation and experiment; Be a kind of indirect verification method,, need set up the automobile finite element model and carry out great amount of calculation for emulation; For experiment, need preproduction car to test repeatedly, if there is bigger defective in body structure design, between design and emulation, experimental verification, will be a continuous process repeatedly so.
The present invention is in order to solve the technical matters in the above-mentioned coach work exploitation; Reduce time-to-market; Reduce cost of development, proposes a kind of to body structure design itself, leading and be independent of emulation and experiment, direct appraisal procedure, with the generation of minimizing design defect.
2, technical scheme of the present invention
In order to reach the purpose that realizes technical matters to be solved by this invention, the present invention proposes a kind of cyclic path body structure design evaluation method, its step comprises:
The first step, the experiences and lessons that utilizes domestic and international body structure design engineering to develop, " Ring material ideal strength grade and Structural Behavior Evaluation " carried out in design to body structure; Confirm the material ideal strength grade of each Ring of body structure, use "+" or other symbol and number thereof to represent the strength of material grade, "+" number is a goals for; "-" is zero, and the importance of each Ring under the different structure performance is assessed, and be same; Use "+" and number thereof to represent significance level; "+" number is a goals for, and "-" is zero, and computation structure performance summation mark;
Second step, to concrete body structure, its each Ring is carried out " the Ring architectural feature is assessed with substantive the requirement ", " 1 " expression Ring satisfies the assessment requirement, the satisfied assessment requirement of " 0 " expression Ring;
The 3rd step; To concrete body structure; Its each Ring is carried out " Ring material actual strength level evaluation ",, judge the material actual strength grade that each Ring of body structure is adopted with reference to the strength of material classification standard that relates in the first step; Provide reality "+" number of each Ring, i.e. goals for;
The 4th step; Assessment result according to " Ring material ideal strength grade and Structural Behavior Evaluation ", " the Ring architectural feature is assessed with substantive the requirement " and " Ring material actual strength level evaluation " in first three step; Calculate " Ring comprehensive assessment " mark of body structure, comprise following three steps again:
A, with architectural feature and the substantive Structural Behavior Evaluation that requires assessment result to multiply by corresponding Ring in the first step respectively of each Ring in second step mark of suing for peace; Obtain the Structural Behavior Evaluation mark of each Ring; With the Structural Behavior Evaluation mark addition of all Ring of body structure, obtain " the Ring structural behaviour overall evaluation mark " of body structure;
B, with the architectural feature of each Ring in second step with substantive require assessment result multiply by respectively the 3rd go on foot in the material actual strength level evaluation mark of corresponding Ring; Obtain the material actual strength level evaluation mark of each Ring; With the material actual strength level evaluation mark addition of all Ring of body structure, obtain " the Ring material actual strength grade overall evaluation mark " of body structure;
C, with " Ring structural behaviour overall evaluation mark " and " Ring material actual strength grade overall evaluation mark " addition, obtain " the Ring comprehensive assessment mark " of body structure.
In the described cyclic path body structure design evaluation method first step " Ring material ideal strength grade and Structural Behavior Evaluation ", it is characterized in that the assessment result shown in each Ring employing table 1 of body structure.
Table 1Ring material ideal strength grade and Structural Behavior Evaluation
Body structure " the Ring comprehensive assessment mark " calculating in the 4th step of described cyclic path body structure design evaluation method; It is characterized in that body structure has all Ring; And satisfy " the Ring architectural feature is assessed with substantive the requirement "; And the material that each Ring adopts is the ideal tensile strength grade, and " the desirable comprehensive assessment mark of Ring " that can obtain body structure is 100 minutes, and be as shown in table 2.
The desirable comprehensive assessment mark of table 2Ring
3, beneficial effect of the present invention
The invention provides a kind of cyclic path body structure design evaluation method, its beneficial effect is following:
(1) in the theoretical aspect of body drawing: cyclic path body structure design evaluation method of the present invention is to have constituted one of important step in cyclic path body structure design theory and the method; Be a kind of appraisal procedure that proposes to the body structure engineering design, be fit to the body structure design-calculated assessment of non-annularity path equally with universality.
(2) in body performance checking aspect: cyclic path body structure design evaluation method of the present invention is independence and is ahead of emulation and the third body structure performance design evaluation method of experiment; Be the self check of body structure engineering design plan (EDP) before submitting simulation analysis and experimental verification to; The high more body structure of having represented of its comprehensive grading will have better structural behaviour, for the body structure engineering design provides evaluation criteria.
(3) in vehicle body Application and Development aspect: cyclic path body structure design evaluation method of the present invention is introduced coach work design and develop flow process; The coach work teacher can hold the design objective of body structure more clearly, reduces the artificial design defect on the body structure, strengthens self-confidence; Simultaneously; Guarantee that submitting the model of emulation and experiment to is optimum as far as possible structure design, reduce unnecessary design and checking repeatedly, reduce cost of development, shorten the design cycle.
Therefore, design has important theory and practice significance to cyclic path body structure design evaluation method of the present invention to body structure.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further explain.
Accompanying drawing 1 is a dream car body structure design evaluation diagram of circuit;
Accompanying drawing 2 is general body structure design evaluation diagram of circuits.
The specific embodiment
In the 3R-BODY structure design; Each " Ring " all has its unique effect and designing requirement; The disappearance of one " Ring " just means the weakening or the disappearance of certain performance; Therefore, based on material design, collision performance and rigidity property and " Ring " structure, a collar shape path body structure appraisal procedure has been proposed; Comprise four aspect contents: " Ring material ideal strength grade and Structural Behavior Evaluation ", " the Ring architectural feature is assessed with substantive the requirement ", " Ring material actual strength level evaluation " and " Ring comprehensive assessment "; This method is one of important component part of cyclic path body structure design theory and method, although be from the design of cyclic path body structure, to propose, is suitable for the body structure design-calculated assessment of non-annularity path equally.
Embodiment one
Present embodiment is body structure to be under the desirable situation at material design and structure design assess; Comprise following three aspects: " Ring material ideal strength grade and Structural Behavior Evaluation ", " Ring ideal structure characteristic is assessed with substantive the requirement " and " the desirable comprehensive assessment of Ring "; The Ring comprehensive assessment result that the purpose of present embodiment is mainly concrete body structure provides reference standard; Accompanying drawing 1 has provided the estimation flow figure of present embodiment, below it is elaborated.
1, Ring material ideal strength grade and Structural Behavior Evaluation
Background technology about " Ring " classificating introduction in, 3R-BODY structural design theory and method have provided 16 basic " Ring " structures forming body structure, and according to material designing requirement, collision performance and rigidity property requirement; Material, critical nature and significance level to " Ring " needs to consider in the body structure engineering design have been carried out comprehensive conclusion and summary, and be as shown in table 3, is the height of " Ring " system in the background technology 3R-BODY structure design is summed up; Be a kind of " Ring " qualitatively Performance Evaluation, this assessment is according to a large amount of engineering analysis experiences, and combination ECB report research draws: the material ideal strength grade of confirming each Ring of body structure; Use "+" and number thereof to represent the strength of material grade; "+" number is a goals for, and "-" is zero, and the importance of each Ring under the different structure performance is assessed; Equally; "+" and number thereof are represented significance level, and "+" number is a goals for, and "-" is zero; And calculate the summation mark, the objectivity of its assessment directly influences the accuracy of " Ring comprehensive assessment ".
Table 3Ring material ideal strength grade and Structural Behavior Evaluation
2, Ring ideal structure characteristic is assessed with substantive the requirement
According to judging " Ring " architectural feature and " Route " substantive requirement in the background technology introduction; " Ring " number of structures that can the objective evaluation body structure be had; " Ring " many body structures performance more will be good more, and architectural feature and substantive requirement are satisfied in " 1 " expression " Ring "; Architectural feature and substantive requirement are not satisfied in " 0 " expression " Ring ".In 16 basic " Ring " structures forming body structure; " Ring " that in ECB report over the years, spell out or indicate is nine, in the present embodiment, and in order to assess desirable score; Think that 16 " Ring " forming body structure all meet the demands, as shown in table 4.
3, the desirable comprehensive assessment of Ring
According to " Ring material ideal strength grade and Structural Behavior Evaluation " and " Ring ideal structure characteristic is assessed with substantive the requirement "; Can carry out comprehensive grading calculating to " Ring " that body structure had from material and two aspects of structure, be divided into following three steps again:
The first step: each " Ring " the assessment mark sum under the different structure performance that provides according to table 3; Reach Ring ideal structure characteristic and substance and require assessment result; The structural behaviour overall evaluation mark of same " Ring " multiply by architectural feature and substantive assessment result; Can obtain the Structural Behavior Evaluation mark of in the body structure each " Ring "; To own the addition of " Ring " Structural Behavior Evaluation mark, and obtain " Ring " structural behaviour overall evaluation mark, the desirable score of structural behaviour as shown in table 4 is 75 minutes;
Second step: material ideal strength grade assessment mark that provides according to table 3 and Ring ideal structure characteristic and substance require assessment result; The material ideal of same " Ring " assessment mark multiply by the ideal structure characteristic and substance requires assessment result; Can obtain the material ideal strength grade assessment mark of in the body structure each " Ring "; To own the addition of " Ring " material ideal strength grade assessment mark; Obtain " Ring " material ideal strength grade overall evaluation mark, material ideal strength grade score as shown in table 4 is 25 minutes;
The 3rd step:, obtain " the desirable comprehensive assessment of Ring " mark with " Ring " structural behaviour overall evaluation mark and the addition of " Ring " material ideal strength grade overall evaluation mark, score as shown in table 4 is 100 minutes.
The desirable mark of table 4Ring comprehensive assessment
Embodiment two
Present embodiment is that the traditional material body structure that relates in the ECB2010 meeting report is assessed; Comprise following four aspects: " Ring material ideal strength grade and Structural Behavior Evaluation ", " the Ring architectural feature is assessed with substantive the requirement ", " Ring material actual strength level evaluation " and " Ring comprehensive assessment "; The purpose of present embodiment is carried out comprehensive assessment to the Ring of concrete body structure; Accompanying drawing 2 has provided the estimation flow figure of present embodiment, below it is elaborated.
1, Ring material ideal strength grade and Structural Behavior Evaluation
With embodiment one.
2, the Ring architectural feature is assessed with substantive the requirement
In the ECB2010 meeting report; " Ring " that body structure had to each main engine plants carries out Ring architectural feature and the substantive requirement assessment of Route, and " 1 " is represented from keynote speech, directly to judge and existed or exist from its traditional design gene indirect judgement; " 0 " representes that this ring does not exist maybe and can't judge, table 5 has provided the Ring architectural feature and the substantive assessment result of each main engine plants' vehicle body structure.
Each the body structure Ring of main engine plants architectural feature of table 5ECB2010 and substantive assessment
3, Ring material actual strength level evaluation
Ring material ideal strength grade evaluation criteria in reference implementation example one table 3; In the ECB2010 meeting report; The material actual strength grade that " Ring " that body structure had of each main engine plants adopts is assessed, and table 6 has provided " Ring " material actual strength level evaluation mark of each main engine plants' vehicle body structure of ECB2010.
Each the body structure Ring of main engine plants material actual strength level evaluation of table 6ECB2010
4, Ring comprehensive assessment
According to " Ring material ideal strength grade and Structural Behavior Evaluation ", " the Ring architectural feature is assessed with substantive the requirement " and " Ring material actual strength level evaluation "; " Ring " that each main engine plants' vehicle body structure of ECB2010 is had carries out comprehensive grading calculating, is divided into following three steps again:
The first step: each " Ring " the assessment mark sum under the different structure performance that provides according to table 3 among the embodiment one; And Ring architectural feature and substance that table 5 provides require assessment result; The structural behaviour overall evaluation mark of same " Ring " multiply by architectural feature and substantive assessment result; Obtain the Structural Behavior Evaluation mark of each " Ring " in each main engine plants' vehicle body structure of ECB2010; With all " Ring " Structural Behavior Evaluation mark additions of body structure of each main engine plants' vehicle, obtain " Ring " structural behaviour overall evaluation mark of each main engine plants' vehicle body structure respectively, as shown in table 7;
Each main engine plants' body structure assessment result of table 7ECB2010
Second step: Ring architectural feature and substance that each the body structure Ring of main engine plants material actual strength level evaluation mark that provides according to table 6 and table 5 provide require assessment result; The material actual strength level evaluation mark of same " Ring " multiply by architectural feature and substance requires assessment result; Obtain the material actual strength level evaluation mark of each " Ring " in each main engine plants' vehicle body structure of ECB2010; Body structure with each main engine plants' vehicle owns the additions of " Ring " material actual strength level evaluation mark respectively; Obtain " Ring " material actual strength grade overall evaluation mark of each main engine plants' vehicle body structure, as shown in table 7;
The 3rd step: respectively with " Ring " structural behaviour overall evaluation mark of each main engine plants' vehicle body structure and the addition of " Ring " material actual strength grade overall evaluation mark; Obtain " Ring " comprehensive assessment mark of each main engine plants' vehicle body structure of ECB2010, as shown in table 7.
Claims (3)
1. cyclic path body structure design evaluation method, its step comprises:
The first step, the experiences and lessons that utilizes domestic and international body structure design engineering to develop, " Ring material ideal strength grade and Structural Behavior Evaluation " carried out in design to body structure; Confirm the material ideal strength grade of each Ring of body structure, use "+" or other symbol and number thereof to represent the strength of material grade, "+" number is a goals for; "-" is zero, and the importance of each Ring under the different structure performance is assessed, and be same; Use "+" and number thereof to represent significance level; "+" number is a goals for, and "-" is zero, and computation structure performance summation mark;
Second step, to concrete body structure, its each Ring is carried out " the Ring architectural feature is assessed with substantive the requirement ", " 1 " expression Ring satisfies the assessment requirement, the satisfied assessment requirement of " 0 " expression Ring;
The 3rd step; To concrete body structure; Its each Ring is carried out " Ring material actual strength level evaluation ",, judge the material actual strength grade that each Ring of body structure is adopted with reference to the strength of material classification standard that relates in the first step; Provide reality "+" number of each Ring, i.e. goals for;
The 4th step; Assessment result according to " Ring material ideal strength grade and Structural Behavior Evaluation ", " the Ring architectural feature is assessed with substantive the requirement " and " Ring material actual strength level evaluation " in first three step; Calculate " Ring comprehensive assessment " mark of body structure, comprise following three steps again:
A, with architectural feature and the substantive Structural Behavior Evaluation that requires assessment result to multiply by corresponding Ring in the first step respectively of each Ring in second step mark of suing for peace; Obtain the Structural Behavior Evaluation mark of each Ring; With the Structural Behavior Evaluation mark addition of all Ring of body structure, obtain " the Ring structural behaviour overall evaluation mark " of body structure;
B, with the architectural feature of each Ring in second step with substantive require assessment result multiply by respectively the 3rd go on foot in the material actual strength level evaluation mark of corresponding Ring; Obtain the material actual strength level evaluation mark of each Ring; With the material actual strength level evaluation mark addition of all Ring of body structure, obtain " the Ring material actual strength grade overall evaluation mark " of body structure;
C, with " Ring structural behaviour overall evaluation mark " and " Ring material actual strength grade overall evaluation mark " addition, obtain " the Ring comprehensive assessment mark " of body structure.
2. " Ring material ideal strength grade and Structural Behavior Evaluation " according to claim 1 is characterized in that the assessment result shown in each Ring employing table 1 of body structure.
Table 1Ring material ideal strength grade and Structural Behavior Evaluation
3. body framwork according to claim 1 " Ring comprehensive assessment mark " calculates; It is characterized in that body structure has all Ring; And satisfy " the Ring architectural feature is assessed with substantive the requirement "; And the material that each Ring adopts is the ideal tensile strength grade, and " the desirable comprehensive assessment mark of Ring " that obtain body structure is 100 minutes, and be as shown in table 2.
The desirable comprehensive assessment mark of table 2Ring
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| CN102867089A (en) * | 2012-09-12 | 2013-01-09 | 肖锋 | Correction method for conceptual model of vehicle body structure and application method thereof |
| CN110362539A (en) * | 2019-07-22 | 2019-10-22 | 武汉上善仿真科技有限责任公司 | A kind of auto Body Technology solution inquiry system and method |
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| CN102867089A (en) * | 2012-09-12 | 2013-01-09 | 肖锋 | Correction method for conceptual model of vehicle body structure and application method thereof |
| CN111989258A (en) * | 2018-04-11 | 2020-11-24 | 本田技研工业株式会社 | Automobile body structure |
| CN111989258B (en) * | 2018-04-11 | 2022-05-24 | 本田技研工业株式会社 | Automobile body structure |
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| CN110704939A (en) * | 2019-08-16 | 2020-01-17 | 中信金属股份有限公司 | Material selection method and system for automobile body parts |
| CN110704939B (en) * | 2019-08-16 | 2023-03-10 | 中信金属股份有限公司 | Material selection method and system for automobile body parts |
| CN113830181A (en) * | 2020-06-24 | 2021-12-24 | 广州汽车集团股份有限公司 | Rear vehicle body structure |
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