CN102867089A - Correction method for conceptual model of vehicle body structure and application method thereof - Google Patents
Correction method for conceptual model of vehicle body structure and application method thereof Download PDFInfo
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Abstract
The invention discloses a correction method for a conceptual model of a vehicle body structure and an application method thereof. The correction method comprises the following steps of: the first step: establishing the conceptual model A of a vehicle body framework structure; the second step: getting the conceptual model A' of a vehicle body cyclic structure, which has equivalent performances with the conceptual model A of the vehicle body framework structure; the third step: getting the conceptual model B of the vehicle body cyclic structure, which corrects parameters of all joint simplified models; and the fourth step: getting the conceptual model C of the vehicle body cyclic structure, which corrects all load transfer path models. According to the correction method disclosed by the invention, by constructing the conceptual model of the vehicle body cyclic structure, the torsional rigidity of the cyclic structure is adopted as an overall performance evaluation index, and the method of getting the parameters of the joint simplified models is also adopted, so that the insufficiencies of the existing conceptual model can be effectively avoided, and the correction method can produce a significant impact on the vehicle body conceptual design method and the flow process and has important guide significance for vehicle body structure design.
Description
Technical field
The present invention relates to a kind of correction and application process thereof of body structure conceptual model, especially relate to setting up the modification method of automotive body structure conceptual model, and adopt this correction model that the body structure design proposal is carried out fast the effectively application process of checking.
Background technology
Body structure is the common carrier of collision safety performance and rigidity of structure performance, and body structure positive development essence is the light-weight design under the guaranteed performance target, how to realize the light-weight design target, and the body structure conceptual model plays a very important role.How effectively to carry out the work of body structure conceptual phase, what each main engine plants mainly relied at present is the CAE technology.
Document [1] (Xu Youzhong etc. conceptual phase coachbuilt body modeling method and NVH optimize analysis .2005MSC.Software Chinese user collection of thesis) from the body stiffness performance, introduced a kind of conceptual model based on beam element; Document [2] (EuroCarBody 2011-13th Global Car Body Benchmarking Conference-Mazda CX-5) then from the collision safety performance, has been introduced a kind of spring-mass conceptual model.From above two pieces of document analysises, have two problems to need to discuss to the Auto-Body Conceptual model:
First problem: two conception of species models are all only paid close attention to a kind of performance and have been ignored another performance, must cause the unicity of evaluation criterion, and in fact, two kinds of performances are all most important to the body structure light-weight design.
Second Problem: conceptual model is the Simplification to body structure, how to guarantee and the reliability that improves the body structure conceptual model is a vital problem.
The Subaru automobile is pointed out: Safety design starts with the vehicle architecture.The Ring Frame Reinforced structure helps absorb the energy of an impact and helps protect vehicle occupants; Document [3] (Xiao Feng etc. the design of cyclic path body structure and appraisal procedure .2012 Chinese automobile safety technique international symposium) think that existence is relevant between the various performances of vehicle body, its correlativity is embodied on a kind of typical ring texture feature, namely construct ring texture and can effectively promote various performances, therefore, ring texture can be used as the essential structure element of structure body structure; Document [4] (Xiao Feng. a kind of method for assessing structural design of ring path vehicle body .[P] China. number of patent application 201110223295.5) vehicle body framework construction shown as by 16 typical ring texturees form, and 16 ring texturees have been made detailed explanation.More than the effective vehicle body architectural framework of structure is most important to performance development in the design of explanation Auto-Body Conceptual, and thinks that all ring texture is a kind of ideal framework structure of carrying out the body lightening design.In fact, in the coach work Development Practice, increasing main engine plants adopt ring texture to carry out light-weight design.
The 3rd problem that needs concern: set up correct body structure conceptual model and effectively instruct engineering design, simple dependence CAE technology is difficult to realize, CAE technology and body structure design philosophy need to be carried out effective combination.
The present invention is according to cyclic path body structure design philosophy, to the vehicle body framework construction conceptual model, on version, by increasing the load bang path newly body frame is shown as by 16 typical ring-type structural group, obtain vehicle body ring texture conceptual model, on the one hand, ignore the structural contribution that increases the load bang path newly by cross section parameter equivalence setting, in full accord on performance with former vehicle body framework construction; On the other hand, by cross section parameter the structural contribution of considering to increase newly the load bang path is set effectively, assesses each ring texture to the impact of body performance.
The present invention is according to cyclic path body structure design philosophy, ring texture can effectively promote collision performance and rigidity property, two kinds of performances are both in fact load bang path problem, at conceptual phase, two kinds of performances are monolithic, need to carry out the design of load bang path from performance unitarity angle, be not suitable for carrying out conceptual analysis from the single performance angle, vehicle body ring texture conceptual model of the present invention adopts " ring texture torsional rigidity " as the evaluation index to overall performance.
Two of ring texture torsional rigidity and body in white torsional rigidities not only interrelate but also have the significantly evaluation index of difference, the former is the overall performance evaluation index, produced by ring texture, comprised Structural Crashworthiness and rigidity of structure performance, the various performances of this higher expression of value are better; The latter is the single performance evaluation index, with the former difference partly be non-ring texture torsional rigidity, crash-worthiness is promoted almost not contribution, this value is higher better to rigidity of structure performance.
The technical solution of the present invention emphasis is to solve the reliability that how to improve the body structure conceptual model.
Summary of the invention
1, technical matters to be solved by this invention
For deficiency of the prior art, technical matters to be solved by this invention is:
First: existing conceptual model is to make up body in white structuring concept model as purpose, and main pair cross-section and Joint Parameter are optimized design; According to cyclic path body structure design philosophy, need at first carry out load bang path optimal design, then be only the Parameters Optimal Designs such as cross section, joint, it is this design philosophy that vehicle body ring texture conceptual model of the present invention has embodied.
The second, existing conceptual model generally only carries out the body structure conceptual design for a kind of performance, has caused the unicity of evaluation criterion; The present invention carries out the body structure conceptual design from the overall performance angle, adopts " ring texture torsional rigidity " as the evaluation index to overall performance.
The 3rd, existing conceptual model butt junction simplified model parameter generally adopts the detailed finite element model of joint to calculate respectively by operating mode and obtains, because joint number and number of parameters are many, the conceptual model overall precision is difficult to be guaranteed, and reliability is not high; The present invention adopts respectively detailed finite element model to substitute each joint simplified model of vehicle body ring texture conceptual model, carries out iterative computation Analysis deterrmination Joint Parameter.
Therefore, the present invention adopts ring texture torsional rigidity as a whole Performance Evaluating Indexes and joint simplified model parameter acquiring method by structure vehicle body ring texture conceptual model, can effectively avoid the deficiency of existing body structure conceptual model.
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 correction and application process thereof of body structure conceptual model, its step comprises:
The first step, extract with reference to bus according to vehicle body framework construction, and definite joint location, set up each load bang path model and compose the cross section attribute and each joint simplified model and compose initial Joint Parameter, obtain vehicle body framework construction conceptual model A, calculate its torsional rigidity value C
T
Second step, to vehicle body framework construction conceptual model A, wherein certain joint simplified model adopts detailed finite element model to substitute, and calculating its torsional rigidity value is C
T1, compare C
TWith C
T1Relative error, its value requires to be controlled at [a%, a%] within, wherein 0≤a≤3 if do not satisfy, are then revised the initial Joint Parameter of this joint simplified model among the vehicle body framework construction conceptual model A, until satisfy error requirements, other joint simplified model adopts same modification method, obtains the vehicle body framework construction conceptual model B of each joint simplified model through revising, and calculates its torsional rigidity value C
T
In the 3rd step, to vehicle body framework construction conceptual model B, wherein certain bar load bang path model adopts detailed finite element model to substitute, and calculating its torsional rigidity value is C
T2, compare C
TWith C
T2Relative error, its value requires to be controlled at [b%, b%] within, 0≤b≤3 wherein, if do not satisfy, then this load bang path model among the vehicle body framework construction conceptual model B revised, until satisfy error requirements, other load bang path model adopts same modification method, obtains the vehicle body framework construction conceptual model C of each load bang path model through revising.
The correction of described body structure conceptual model and application process thereof, it is characterized in that in the first step, to vehicle body framework construction conceptual model A, on version, by increasing the load bang path newly body frame is shown as by 16 typical ring-type structural group, ignore the structural contribution that increases the load bang path newly by cross section parameter equivalence setting, obtain the vehicle body ring texture conceptual model A ' consistent with former vehicle body framework construction performance.
The correction of described body structure conceptual model and application process thereof, it is characterized in that in the 3rd step, to vehicle body framework construction conceptual model C, on version, by increasing the load bang path newly body frame is shown as by 16 typical ring-type structural group, ignore the structural contribution that increases the load bang path newly by cross section parameter equivalence setting, obtain the vehicle body ring texture conceptual model C ' consistent with former vehicle body framework construction performance.
The correction of described body structure conceptual model and application process thereof, it is characterized in that obtaining vehicle body ring texture conceptual model C according to the competition vehicle or with reference to the vehicle body structure, can by adjusting its load bang path model and Joint Parameter, obtain the vehicle body ring texture conceptual model D of project development vehicle.
The correction of described body structure conceptual model and application process thereof, it is characterized in that to adopt the vehicle body ring texture conceptual model D of project development vehicle to carry out the comparative analysis of joint design scheme, concrete grammar is: adopt the detailed finite element model of different designs scheme to substitute a certain joint simplified model among the vehicle body framework construction conceptual model D, calculate respectively ring-type construction torsion rigidity value, Cost And Performance between the balance different designs scheme is determined optimum joint design scheme.
The correction of described body structure conceptual model and application process thereof, it is characterized in that to adopt the vehicle body ring texture conceptual model D of project development vehicle to carry out the comparative analysis of load bang path design proposal, concrete grammar is: adopt the detailed finite element model of different designs scheme to substitute on a certain load bang path model among the vehicle body ring texture conceptual model D, calculate respectively ring-type construction torsion rigidity value, Cost And Performance between the balance different designs scheme is determined optimum load bang path design proposal.
The correction of described body structure conceptual model and application process thereof is characterized in that on the vehicle body ring texture conceptual model D basis of project development vehicle, adopt shell unit simulation body outer skin, obtain the body structure conceptual model E of project development vehicle.
3, beneficial effect of the present invention
The invention provides a kind of correction and application process thereof of body structure conceptual model, its beneficial effect is as follows:
First: adopt the traditional concept model can be thick to body structure cross section, material, the parameter such as joint carries out optimized design, but find in actual coach work exploitation: the optimized design of parameter itself can not guarantee the lifting of body structure overall performance, that is to say, exist than the prior prerequisite design of parameter itself.The present invention is under cyclic path body structure design philosophy instructs, found that this prerequisite design is the optimization of load bang path, namely adopt the ring texture conceptual model at first to carry out the optimal design of ring texture, ring texture is the basic structural feature of lightweight vehicle body, can effectively promote torsional rigidity, permanance and collision safety performance, simultaneously, ring texture is to carry out the light-weight design precondition, the directly thick optimization of cross section, joint, material take loss of weight as purpose, light-weight design will be water without a source, like a tree without roots.
Second: the traditional concept model generally only carries out the body structure conceptual design for a kind of performance, its important hypothesis is to be separate between the various performances of vehicle body, the present invention has found the unitarity of performance, think between the body performance it is not fully independently, but there is performance unitarity in various degree in different design stage, at conceptual phase, performance is monolithic, need to carry out structural design from performance unitarity angle, be not suitable for carrying out conceptual analysis from the single performance angle, adopt " ring texture torsional rigidity " to assess overall performance, circular feature provides architecture basics for the performance unitarity; In project engineering stage, need to pay close attention to the antagonism of performance, carry out respectively structure design verification from the single performance angle, find the optimal balance point of various performances, for light-weight design provides precondition, the Auto-Body Conceptual of the present invention that is found to be of performance unitarity designs concrete technology path and formulates theoretical foundation is provided, and a kind of technology visual angle of innovation is provided for the understanding of coach work exploitation.
The 3rd, Auto-Body Conceptual model error main source is the cumulative of joint simplified model error, the acquisition methods of the joint simplified model parameter of traditional concept model so that the torsional rigidity error more than 10%, error is difficult to control, the reliability of the adjustment model is not high; The present invention adopts detailed finite element model to substitute the single joint simplified model of vehicle body ring texture conceptual model, Joint Parameter is determined in the comparative analysis of carrying out repeatedly, in fact that joint simplified model and finite element model are carried out combination, take full advantage of advantage separately and avoid separately deficiency, for joint simplified model parameter determines to provide a system-level CAE verification environment, owing to directly compare evaluation with the ring texture torsional rigidity, thereby guarantee to obtain joint simplified model parameter in the controlled mode of error.
Therefore, the present invention is a kind of Auto-Body Conceptual method for designing of active, will produce significant impact to existing Auto-Body Conceptual method for designing and flow process, and design produces important directive significance to body structure.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in further detail.
Accompanying drawing 1 is the vehicle body framework construction conceptual model;
Accompanying drawing 2 is vehicle body ring texture conceptual models;
Accompanying drawing 3 is the vehicle body ring texture conceptual models after certain joint substitutes;
Accompanying drawing 4 is the vehicle body ring texture conceptual models after certain load bang path substitutes;
Accompanying drawing 5 is vehicle body ring texture conceptual model Establishing process figure;
Accompanying drawing 6 is vehicle body ring texture conceptual models of certain MPV vehicle;
Accompanying drawing 7 is vehicle body ring texture twisting conditions displacement result of certain MPV vehicle;
Accompanying drawing 8 is based on certain MPV vehicle vehicle body ring texture conceptual model of true Connector Model;
Accompanying drawing 9 is based on the vehicle body ring texture twisting conditions displacement result of certain MPV vehicle of true Connector Model.
Embodiment
Embodiment one
Present embodiment has provided foundation and the modification method of the vehicle body ring texture conceptual model that the present invention is directed to certain vehicle, and its step comprises:
The first step, extract with reference to bus according to certain vehicle vehicle body framework construction, and definite joint location, document [5] (Zhang Zhewei. " based on the body structure analysis and optimization of simplified model ". Tongji University's Master's thesis) describe the extracting method with reference to bus in detail, based on the reference bus, adopt beam element to set up each load bang path model and compose the cross section attribute; According to joint location, adopt spring model and rigid element to set up each joint simplified model and compose initial Joint Parameter, can calculate respectively by operating mode by the detailed finite element model of joint and obtain, obtain vehicle body framework construction conceptual model A as shown in Figure 1;
Second step, according to cyclic path body structure design philosophy, on version, by increasing the load bang path newly body frame is shown as by 16 typical ring-type structural group, ignore the structural contribution that increases the load bang path newly by cross section parameter equivalence setting, thereby substantially consistent with actual vehicle body framework construction, obtain vehicle body ring texture conceptual model A ' as shown in Figure 2, title and the Position Approximate of 16 ring texturees have been provided, and mark the joint simplified model of one of them Joint-B position and the load bang path model of a B-Pillar position, calculate its ring texture torsional rigidity value C
t
The 3rd step, on vehicle body ring texture conceptual model A ' basis, adopt the detailed finite element model of joint (FEM) to substitute the joint simplified model of the Joint-B position of mark among Fig. 2, and adopt between the beam element and be rigidly connected, vehicle body ring texture conceptual model after obtaining as shown in Figure 3 certain joint and substituting, calculating its ring texture torsional rigidity value is C
T1, the desired value with this value is revised as butt junction simplified model parameter compares C
tWith C
T1Relative error, its value requires to be controlled at [1%, 1%] within, if satisfied then butt junction initial parameter is revised, until satisfy error requirements, other joint simplified model adopts same modification method, obtains each joint simplified model certain vehicle vehicle body ring texture conceptual model B through revising, and calculates its ring texture torsional rigidity value C
t
The 4th step, on vehicle body ring texture conceptual model B basis, adopt detailed finite element model to substitute on the load bang path model of the B-Pillar position of mark among Fig. 2, and adopt between the joint simplified model and be rigidly connected, vehicle body ring texture conceptual model after certain load bang path as shown in Figure 4 substitutes, calculating its ring texture torsional rigidity value is C
T2, the desired value of this value for load bang path model is revised, relatively C
tWith C
T2Relative error, its value requires to be controlled at [0.5%, 0.5%] within, if do not satisfy then this load bang path model revised, generally can improve precision by increasing number of cross sections, until satisfy error requirements, other load bang path model adopts same modification method, obtain the vehicle body ring texture conceptual model C of each load bang path model through revising, Fig. 5 is vehicle body ring texture conceptual model Establishing process figure.
Embodiment two
Present embodiment has provided the Engineering Projects of the present invention in implementation.
Adopt modeling method and the parameter correction method of vehicle body ring texture conceptual model of the present invention, obtained the vehicle body ring texture conceptual model of certain MPV vehicle as shown in Figure 6, Fig. 7 is the vehicle body ring texture twisting conditions displacement result of certain MPV vehicle, and can calculate this MPV vehicle ring texture torsional rigidity value according to the load(ing) point displacement is 6.1KN.m/deg.
The joint simplified model is all replaced with the detailed finite element model of joint, obtain certain MPV vehicle vehicle body ring texture conceptual model based on true Connector Model as shown in Figure 8, Fig. 9 is based on the vehicle body ring texture twisting conditions displacement result of certain MPV vehicle of true Connector Model, and can calculate this MPV vehicle ring texture torsional rigidity value according to the load(ing) point displacement is 5.9KN.m/deg.
Claims (7)
1. the correction of a body structure conceptual model and application process thereof, its step comprises:
The first step, extract with reference to bus according to vehicle body framework construction, and definite joint location, set up each load bang path model and compose the cross section attribute and each joint simplified model and compose initial Joint Parameter, obtain vehicle body framework construction conceptual model A, calculate its torsional rigidity value C
T
Second step, to vehicle body framework construction conceptual model A, wherein certain joint simplified model adopts detailed finite element model to substitute, and calculating its torsional rigidity value is C
T1, compare C
TWith C
T1Relative error, its value requires to be controlled at [a%, a%] within, wherein 0≤a≤3 if do not satisfy, are then revised the initial Joint Parameter of this joint simplified model among the vehicle body framework construction conceptual model A, until satisfy error requirements, other joint simplified model adopts same modification method, obtains the vehicle body framework construction conceptual model B of each joint simplified model through revising, and calculates its torsional rigidity value C
T
In the 3rd step, to vehicle body framework construction conceptual model B, wherein certain bar load bang path model adopts detailed finite element model to substitute, and calculating its torsional rigidity value is C
T2, compare C
TWith C
T2Relative error, its value requires to be controlled at [b%, b%] within, 0≤b≤3 wherein, if do not satisfy, then this load bang path model among the vehicle body framework construction conceptual model B revised, until satisfy error requirements, other load bang path model adopts same modification method, obtains the vehicle body framework construction conceptual model C of each load bang path model through revising.
2. the correction of body structure conceptual model according to claim 1 and application process thereof, it is characterized in that in the first step, to vehicle body framework construction conceptual model A, on version, by increasing the load bang path newly body frame is shown as by 16 typical ring-type structural group, ignore the structural contribution that increases the load bang path newly by cross section parameter equivalence setting, obtain the vehicle body ring texture conceptual model A ' consistent with former vehicle body framework construction performance.
3. the correction of body structure conceptual model according to claim 1 and application process thereof, it is characterized in that in the 3rd step, to vehicle body framework construction conceptual model C, on version, by increasing the load bang path newly body frame is shown as by 16 typical ring-type structural group, ignore the structural contribution that increases the load bang path newly by cross section parameter equivalence setting, obtain the vehicle body ring texture conceptual model C ' consistent with former vehicle body framework construction performance.
4. according to claim 2 or the correction of 3 described body structure conceptual models and application process thereof, it is characterized in that obtaining vehicle body ring texture conceptual model C according to the competition vehicle or with reference to the vehicle body structure, can by adjusting its load bang path model and Joint Parameter, obtain the vehicle body ring texture conceptual model D of project development vehicle.
5. the correction of body structure conceptual model according to claim 4 and application process thereof, it is characterized in that to adopt the vehicle body ring texture conceptual model D of project development vehicle to carry out the comparative analysis of joint design scheme, concrete grammar is: adopt the detailed finite element model of different designs scheme to substitute a certain joint simplified model among the vehicle body framework construction conceptual model D, calculate respectively ring-type construction torsion rigidity value, Cost And Performance between the balance different designs scheme is determined optimum joint design scheme.
6. the correction of body structure conceptual model according to claim 4 and application process thereof, it is characterized in that to adopt the vehicle body ring texture conceptual model D of project development vehicle to carry out the comparative analysis of load bang path design proposal, concrete grammar is: adopt the detailed finite element model of different designs scheme to substitute on a certain load bang path model among the vehicle body ring texture conceptual model D, calculate respectively ring-type construction torsion rigidity value, Cost And Performance between the balance different designs scheme is determined optimum load bang path design proposal.
7. the correction of body structure conceptual model according to claim 4 and application process thereof, it is characterized in that on the vehicle body ring texture conceptual model D basis of project development vehicle, adopt shell unit simulation body outer skin, obtain the body structure conceptual model E of project development vehicle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104318012A (en) * | 2014-10-21 | 2015-01-28 | 北京汽车股份有限公司 | Body-in-white weight reduction design method and device |
| CN108875188A (en) * | 2018-06-08 | 2018-11-23 | 江铃汽车股份有限公司 | The optimization method and device of body of a motor car connector |
| CN109726406A (en) * | 2017-10-27 | 2019-05-07 | 广州汽车集团股份有限公司 | Vehicle body joint optimization design method, device, terminal and storage medium |
| 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 |
| CN110362543A (en) * | 2019-07-22 | 2019-10-22 | 武汉上善仿真科技有限责任公司 | A kind of the filename appointing system and application method of auto Body Technology solution |
| CN110413640A (en) * | 2019-07-22 | 2019-11-05 | 武汉上善仿真科技有限责任公司 | A kind of body of a motor car part inquiry system and method |
| CN110427372A (en) * | 2019-07-22 | 2019-11-08 | 武汉上善仿真科技有限责任公司 | A kind of body of a motor car Part No. appointing system and its application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104318012A (en) * | 2014-10-21 | 2015-01-28 | 北京汽车股份有限公司 | Body-in-white weight reduction design method and device |
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| CN108875188A (en) * | 2018-06-08 | 2018-11-23 | 江铃汽车股份有限公司 | The optimization method and device of body of a motor car connector |
| CN108875188B (en) * | 2018-06-08 | 2022-08-02 | 江铃汽车股份有限公司 | Method and device for optimizing a body joint of a motor vehicle |
| CN110413640A (en) * | 2019-07-22 | 2019-11-05 | 武汉上善仿真科技有限责任公司 | A kind of body of a motor car part inquiry system and method |
| CN110427372A (en) * | 2019-07-22 | 2019-11-08 | 武汉上善仿真科技有限责任公司 | A kind of body of a motor car Part No. appointing system and its application method |
| CN110362543A (en) * | 2019-07-22 | 2019-10-22 | 武汉上善仿真科技有限责任公司 | A kind of the filename appointing system and application method of auto Body Technology solution |
| CN110427372B (en) * | 2019-07-22 | 2022-02-08 | 武汉上善仿真科技有限责任公司 | Automobile body part number designating system and using method thereof |
| CN110413640B (en) * | 2019-07-22 | 2022-03-04 | 武汉上善仿真科技有限责任公司 | Automobile body part query system and method |
| 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 |
| CN113844569A (en) * | 2021-08-31 | 2021-12-28 | 东风悦享科技有限公司 | Platform design method for body structure of pure electric vehicle |
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Application publication date: 20130109 |