CN107526878A - A kind of equivalent method and system of vehicle body Connector Model - Google Patents
A kind of equivalent method and system of vehicle body Connector Model Download PDFInfo
- Publication number
- CN107526878A CN107526878A CN201710658957.9A CN201710658957A CN107526878A CN 107526878 A CN107526878 A CN 107526878A CN 201710658957 A CN201710658957 A CN 201710658957A CN 107526878 A CN107526878 A CN 107526878A
- Authority
- CN
- China
- Prior art keywords
- model
- joint
- main split
- equivalent
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Geometry (AREA)
- General Physics & Mathematics (AREA)
- Evolutionary Computation (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Pure & Applied Mathematics (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses a kind of equivalent method of vehicle body Connector Model, including step：Extraction needs equivalent joint shell unit model on white body model；Obtain the rotational stiffness value of joint shell unit model；The Joint rigidity model being made up of main split's beam and secondary branch beam is established according to joint shell unit model；Obtain the rotational stiffness value of Joint rigidity model；In Joint rigidity model, main split's beam is replaced with to the torsionspring group for including three torsionsprings with time constraint of the branch beam junction in rotation direction, obtains rigidity value corresponding to each torsionspring, obtains the equivalent simplified model of vehicle body joint；Vehicle body joint equivalent simplified model, which is replaced in white body model, needs equivalent joint shell unit model.The invention also discloses a kind of corresponding system.Implement the present invention, the connection flexibility of original joint can be simulated by equivalent model, there is higher equivalent precision, and improve computational efficiency.
Description
Technical field
The present invention relates to Automobile Body Design technical field, a kind of equivalent method more particularly, to vehicle body Connector Model and
System.
Background technology
At present, the equivalent method of vehicle body Connector Model is mainly hyperelement condensation matrix method and simplified model method, wherein, it is preceding
A kind of method can obtain concrete numerical value, but can not be parameterized and optimization processing；Generally existing is neglected in later approach
The problem of flexibility, the number of springs that slightly connect are excessive, computationally intensive, modeling is complicated, still lack it is a kind of can extensively using and have
The method for simplifying of higher equivalent precision.
When being particularly related to the Connector Model with three or more branches（This type fittings is main in vehicle body
Joint）, it is necessary to which the number of springs of structure is more, cause simplified model computationally intensive and complicated, meanwhile, excessive spring parameter
Value is unfavorable for follow-up optimization, the development of design work.
The content of the invention
The technical problems to be solved by the invention are, there is provided a kind of equivalent method and system of vehicle body Connector Model, can
To simulate the connection of original joint flexibility by equivalent model, there is higher equivalent precision, and higher computational efficiency, have
Beneficial to the parametrization and optimization processing in vehicle body design.
In order to solve the above-mentioned technical problem, the one side of the embodiment of the present invention provides a kind of grade efficacious prescriptions of vehicle body Connector Model
Method, comprise the following steps：
Extraction needs equivalent joint shell unit model on white body model, the joint shell unit model include main split with
And secondary branch；
Row constraint is entered to main split's end points in the joint shell unit model, applies three directions on secondary branch's end points
On predetermined torque, obtain three directions torque corresponding to joint shell unit model rotational stiffness value；
The Joint rigidity model being made up of main split's beam and secondary branch beam is established according to joint shell unit model, in the joint
In rigid model, main split's beam being rigidly connected using staff cultivation with time branch beam junction；
Row constraint is entered to the end points at main split's beam both ends, applied and to main split on the free end points of the secondary branch beam
End points enters the predetermined torque on identical three directions in row constraint, obtains the Joint rigidity model corresponding to the torque in three directions
Rotational stiffness value；
In the Joint rigidity model, main split's beam and time constraint of the branch beam junction in rotation direction are replaced with into bag
Include the torsionspring group of three torsionsprings, according to the rotational stiffness value of the upward joint shell unit model of foregoing each party and
The rotational stiffness value of Joint rigidity model obtains rigidity value corresponding to each torsionspring, so as to obtain the equivalent letter of vehicle body joint
Change model；
In white body model, the vehicle body joint equivalent simplified model is replaced into the equivalent joint shell unit mould of the needs
Type.
Wherein, it is described to be specially the step of extraction needs joint shell unit model on white body：
Extraction needs equivalent joint shell unit model from white body model, straight flange during extraction beyond arc transition region
Region is blocked, and each straight flange zone length retains predetermined length, and wherein longer branch is defined as into main split,
The branch being connected with main split is defined as time branch.
Wherein, the step of rotational stiffness value of the joint shell unit model corresponding to the torque for obtaining three directions has
Body is：
Staff cultivation is carried out to two end points of main split, loaded successively on secondary branch's end points predetermined on three degree of freedom direction
The rotating torque of numerical value, the upward angular displacement of each party is obtained respectively；
Obtaining each party according to the upward torque of each party and the ratio of angular displacement, corresponding joint shell unit model turns upwards
Dynamic stiffness valueK SH4 、K SH5 WithK SH6 。
Wherein, it is described that the Joint rigidity mould being made up of rigidly connected one-dimensional beam element is established according to joint shell unit model
The step of type is specially：
Main split in joint shell unit model and main split's beam in time branch's correspondence establishment Joint rigidity model and
The section of secondary branch beam, main split's beam and time branch beam corresponds to the section on straight flange region using shell unit model；
In the primary and secondary branch beam junction, the connection end point on main split's beam is arranged to principal point, positioned at secondary branch beam
On connection end point be arranged to time point, the principal point is arranged to identical coordinate with time point；
Using the RBE2 connections of the staff cultivation on six-freedom degree direction between principal point and secondary point（Rigid Bar Element 2,
Rigid bar unit is rigidly connected）.
Wherein, the step of rotational stiffness value of the Joint rigidity model corresponding to the torque for obtaining three directions is specific
For：
Staff cultivation is carried out to the end points at the both ends of main split's beam of rigid model, loads three successively on the end points of secondary branch beam
Predetermined value rotating torque on free degree direction, the upward angular displacement of each party is obtained respectively；
The rotation of each party's corresponding Joint rigidity model upwards is obtained according to the upward torque of each party and the ratio of angular displacement
Rigidity valueK R4 、K R5 WithK R6 。
Wherein, described the step of obtaining the equivalent simplified model of vehicle body joint, is specially：
In the Joint rigidity model, main split's beam and time branch beam junction RBE2 connection constraints frees degree are changed to three
It is individual；
In the Joint rigidity model, main split's beam and secondary branch beam junction are increased into by a torsionspring between tie point
Group, the torsion spring group include three independent and orthogonal torsionsprings；
Spring stiffness values corresponding to each torsionspring in the torsionspring group are obtained respectively using following formulaK S4 、K S5 WithK S6 ：
K S =1/(1/K SH -1/K R )
Wherein, it is describedK SH For the rotational stiffness value of joint shell unit modelK SH4 、K SH5 WithK SH6 ；It is describedK R For Joint rigidity model
Rotational stiffness valueK R4 、K R5 WithK R6 。
Correspondingly, another aspect of the present invention, a kind of equivalent system of vehicle body Connector Model is also provided, including：
Joint shell unit model extraction unit, the joint shell unit model equivalent for the extraction needs on white body model, institute
Stating joint shell unit model includes main split and secondary branch；
First rotational stiffness value acquiring unit, for entering row constraint to main split's end points in the joint shell unit model,
Apply the predetermined torque on three directions on secondary branch's end points, obtain the joint shell unit corresponding to the torque in three directions
The rotational stiffness value of model；
Joint rigidity model establishes unit, is made up of for being established according to joint shell unit model main split's beam and secondary branch beam
Joint rigidity model, in the Joint rigidity model, main split's beam is with time branch beam junction using staff cultivation
It is rigidly connected；
Second rotational stiffness value acquiring unit, for entering row constraint to the end points at main split's beam both ends, to the secondary branch
Apply the predetermined torque on three directions identical with the first rotational stiffness value acquiring unit on the end points at beam both ends, obtain
The rotational stiffness value of Joint rigidity model corresponding to the torque in three directions；
Equivalent simplified model acquiring unit, in the Joint rigidity model, by main split's beam and time branch beam junction
Constraint in rotation direction replaces with the torsionspring group for including three torsionsprings, according to the upward joint of foregoing each party
The rotational stiffness value of shell unit model and the rotational stiffness value of Joint rigidity model obtain rigidity corresponding to each torsionspring
Value, so as to obtain the equivalent simplified model of vehicle body joint；
Replacement unit, in white body model, it is equivalent that the vehicle body joint equivalent simplified model to be replaced into the needs
Joint shell unit model.
Wherein, the joint shell unit model extraction unit includes：
Interception unit, for from white body model extraction need equivalent joint shell unit model, from arc transition during extraction
Straight flange region beyond region is blocked, and each straight flange zone length retains predetermined length；
Definition unit, for branch longer in joint shell unit model to be defined as into main split, by what is be connected with main split
Branch is defined as time branch.
Wherein, the first rotational stiffness value acquiring unit includes：
First operating unit, staff cultivation is carried out for two end points to main split, three are loaded successively on secondary branch's end points
The rotating torque of predetermined value on free degree direction, the upward angular displacement of each party is obtained respectively；
First computing unit, for being connect according to corresponding to the ratio of the upward torque of each party and angular displacement acquisition each party is upward
The rotational stiffness value of head capsule model of elementK SH4 、K SH5 WithK SH6 。
Wherein, the Joint rigidity model, which establishes unit, includes：
Branch beam setting unit, for the main split in joint shell unit model and time branch's correspondence establishment Joint rigidity mould
Main split's beam and secondary branch beam in type, main split's beam correspond to straight flange with the section of time branch beam using shell unit model
Section on region；
Connection end point setting unit, in the primary and secondary branch beam junction, the connection end point on main split's beam to be set
Principal point is set to, the connection end point in secondary branch beam is arranged to time point, and the principal point is arranged to identical seat with time point
Mark；
Rigidity parameters setting unit, for the RBE2 that the staff cultivation in six-freedom degree direction is used between principal point and secondary point to be connected
Connect.
Wherein, the second rotational stiffness value acquiring unit includes：
Second operating unit, the end points for the both ends of main split's beam to rigid model carries out staff cultivation, in secondary branch beam
The predetermined value rotating torque on three degree of freedom direction is loaded on end points successively, obtains the upward angular displacement of each party respectively；
Second computing unit, for being connect according to corresponding to the ratio of the upward torque of each party and angular displacement acquisition each party is upward
The rotational stiffness value of head rigid modelK R4 、K R5 WithK R6 。
Wherein, the equivalent simplified model acquiring unit includes：
Rigid constraint changing unit, in the Joint rigidity model, by main split's beam and time branch beam junction RBE2
The connection constraints free degree is changed to three；
Torsionspring group setting unit, in the Joint rigidity model, main split's beam and time branch beam junction to be existed
Increase by a torsionspring group between tie point, the torsion spring group includes three independent and orthogonal torsionsprings；
3rd computing unit, for obtaining the torsionspring group respectively in bullet corresponding to each torsionspring using following formula
Spring rigidity valueK S4 、K S5 WithK S6 ：
K S =1/(1/K SH -1/K R )
Wherein, it is describedK SH For the rotational stiffness value of joint shell unit modelK SH4 、K SH5 WithK SH6 ；It is describedK R For Joint rigidity model
Rotational stiffness valueK R4 、K R5 WithK R6 。
Implement the embodiment of the present invention, there is following beneficial effect：
First, the equivalent method or system of vehicle body Connector Model provided by the invention are implemented, linker branches are carried out into primary and secondary draws
Point so that equivalent simplified model only needs a small amount of spring, and with regard to that can simulate the flexibility of joint, its simple in construction and parameter is less, can be with
Improve calculate vehicle body mechanical characteristic computational efficiency, meanwhile, joint equivalent simplified model on main free degree direction have with
Shell unit model identical rotational stiffness, dramatically improve the equivalent precision of joint；
Secondly, the joint equivalent simplified model that the present invention obtains is by one-dimensional beam element（Main split's beam and time branch beam）、RBE2（Just
Property connection）Formed with torsionspring group, connection end point carries out concurrent processing in joint equivalent simplified model（There is identical to sit
Mark difference）, the translation direction of RBE2 constraint connections（Free degree 1-3）, the rotation for the torsionspring group control connection that length is 0
Direction（Free degree 4-6）, it is simple to operate and realize be hinged processing truly；A small amount of parameter, which only need to be extracted, to obtain
Connector Model is parameterized, each joint is more conducive to the parameterized treatment of Car body model after equivalent；
In addition, the structure and shell unit model of the joint equivalent model that the present invention obtains are more consistent, according to rotational stiffness value pair
The one-dimensional beam element and spring stiffness values of equivalent simplified model optimize, and can obtain cross section property and the connection of linker branches
Intensity etc., so as to instruct the design work of joint.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is that the present invention provides a kind of main flow schematic diagram of one embodiment of vehicle body Connector Model equivalent method；
Fig. 2 is the schematic diagram of the vehicle body joint shell unit model one embodiment being related in Fig. 1；
Fig. 3 is the schematic diagram of vehicle body Joint rigidity model corresponding with Fig. 2；
Fig. 4 is the schematic diagram of vehicle body joint equivalent simplified model corresponding with Fig. 3；
Fig. 5 is that the present invention provides a kind of structural representation of one embodiment of vehicle body Connector Model equivalent system；
Fig. 6 is the structural representation of one embodiment of Fig. 5 center tap shell unit model extraction units；
Fig. 7 is the structural representation of one embodiment of the first rotational stiffness value acquiring unit in Fig. 5；
Fig. 8 is the structural representation of one embodiment that Fig. 5 center tap rigid models establish unit；
Fig. 9 is the structural representation of one embodiment of the second rotational stiffness value acquiring unit in Fig. 5；
Figure 10 is the structural representation of one embodiment of equivalent simplified model acquiring unit in Fig. 5.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, show that the present invention provides a kind of main flow of one embodiment of vehicle body Connector Model equivalent method
Journey schematic diagram；In combination with shown in Fig. 2 to Fig. 4, in this embodiment, the equivalent method of the vehicle body Connector Model, including it is as follows
Step：
Step S10, the equivalent joint shell unit model of extraction needs, the joint shell unit model include on white body model
Main split and secondary branch；Specially：
Extraction needs equivalent joint shell unit model from white body model, straight flange during extraction beyond arc transition region
Region is blocked, and each straight flange zone length retains predetermined length, and wherein longer branch is defined as into main split,
The branch being connected with main split is defined as time branch.
It is understood that in white body model, the body rail of corresponding such as forward engine room, gusset, top cover, floor etc.
Connecting portion can extract joint shell unit model.
As shown in Fig. 2 illustrated therein is the joint shell unit model in three directions, each of which straight flange retains straight
Side size is length a（Such as 50mm）, it can so ensure the complete structure of joint, and by based on the branch markers of horizontal direction
Branch B1, the branch markers of vertical direction are time branch B2；
Step S11, row constraint is entered to main split's end points in the joint shell unit model, applied on secondary branch's end points
Predetermined torque on three directions, obtain the rotational stiffness value of the joint shell unit model corresponding to the torque in three directions；Tool
Body is：
Staff cultivation is carried out to two end points of main split, loaded successively on secondary branch's end points pre- on the direction of the free degree 4,5,6
The rotating torque of fixed number value, the upward angular displacement of each party is obtained respectively；
Obtaining each party according to the upward torque of each party and the ratio of angular displacement, corresponding joint shell unit model turns upwards
Dynamic stiffness valueK SH4 、K SH5 WithK SH6 。
As shown in Figure 2, it is necessary to carry out staff cultivation to main split B1 end points P1 and P2, on secondary branch B2 end points P3 according to
The rotating torque of predetermined value on the secondary loading free degree 4,5,6 direction, so as to obtain corresponding rotational stiffnessK SH4 、K SH5 WithK SH6 ；Wherein, the predetermined value can be predefined according to different application places；
Step S12, the Joint rigidity model being made up of main split's beam and secondary branch beam is established according to joint shell unit model,
In the Joint rigidity model, main split's beam being rigidly connected using staff cultivation with time branch beam junction；With reference to Fig. 3 institutes
Show, the step is specially：
Main split's beam in main split and time branch's correspondence establishment Joint rigidity model in joint shell unit model（Scheme
Middle girder B1）And secondary branch beam（Secondary beam B2 i.e. in figure）, main split's beam and the section of time branch beam use shell unit mould
Type corresponds to the section on straight flange region；
In the primary and secondary branch beam junction, the connection end point on main split's beam is arranged to principal point M1, positioned at secondary branch
Connection end point on beam is arranged to time point M2, and the principal point is arranged to identical coordinate, i.e., by principal point and time point with time point
Concurrent processing is carried out, it ensure that the torsionspring length of follow-up simplified model is 0；
Six-freedom degree direction is used between principal point and secondary point（Free degree 1-6）On staff cultivation RBE2（RBE2_01）Carry out
Connection.
Step S13, row constraint is entered to the end points at main split's beam both ends, to being applied on the end points at the secondary branch beam both ends
Add three directions identical with step S11（The i.e. foregoing direction of the free degree 4,5,6）On predetermined torque, obtain three directions power
The rotational stiffness value of Joint rigidity model corresponding to square；Specially：
Staff cultivation is carried out to the end points at the both ends of main split's beam of rigid model, loading is free successively on the end points of secondary branch beam
The predetermined value rotating torque spent on 4,5,6 directions, the upward angular displacement of each party is obtained respectively；
The rotation of each party's corresponding Joint rigidity model upwards is obtained according to the upward torque of each party and the ratio of angular displacement
Rigidity valueK R4 、K R5 WithK R6 。
As shown in figure 3, staff cultivation is carried out in two end points P1 and P2 of main split's beam of rigid model, in secondary branch beam
The predetermined value rotating torque on the direction of the free degree 4,5,6 is loaded on end points P3 successively, tries to achieve corresponding rotational stiffness respectivelyK R4 、K R5 WithK R6 ；Wherein, the predetermined value is identical with the predetermined value in step S11；
Step S14, in the Joint rigidity model, by main split's beam and time constraint of the branch beam junction in rotation direction
Replacing with includes the torsionspring group of three torsionsprings, firm according to the rotation of the upward joint shell unit model of foregoing each party
Angle value and the rotational stiffness value of Joint rigidity model obtain rigidity value corresponding to each torsionspring, so as to obtain vehicle body joint
Equivalent simplified model；Specially：
In the Joint rigidity model, main split's beam and time branch beam junction RBE2 connection constraints frees degree are changed to three
It is individual（That is 1-3）；
In the Joint rigidity model, main split's beam and secondary branch beam junction are increased into by a torsionspring between tie point
Group, the torsion spring group include three independent and orthogonal torsionsprings；
Spring stiffness values corresponding to each torsionspring in the torsionspring group are obtained respectively using following formulaK S4 、K S5 WithK S6 ：
K S =1/(1/K SH -1/K R )
Wherein, it is describedK SH For the rotational stiffness value of joint shell unit modelK SH4 、K SH5 WithK SH6 ；It is describedK R For Joint rigidity model
Rotational stiffness valueK R4 、K R5 WithK R6 。
Specifically, formula is passed throughK S4 =1/(1/K SH4 -1/K R4 ) calculate spring rate corresponding to first torsionspring of acquisition
ValueK S4 ；Pass through formulaK S5 =1/(1/K SH5 -1/K R5 ) calculate spring stiffness values corresponding to second torsionspring of acquisitionK S5 ；Pass through
FormulaK S6 =1/(1/K SH6 -1/K R6 ) calculate the 3rd spring stiffness values corresponding to torsionspring of acquisitionK S6 ；
As shown in figure 4, so as in vehicle body joint equivalent simplified model, principal point and from passing through the flat of RBE2 constraint connections between point
Dynamic direction（Free degree 1-3）, length is 0 torsionspring group（From point and principal point concurrent）Control the rotation direction of connection（Freely
Spend 4-6）, the be hinged processing truly connected so can be achieved；
Step S15, in white body model, the vehicle body joint equivalent simplified model is replaced into the equivalent joint shell of the needs
Model of element, in this step, it is necessary to pay attention to keeping the uniformity being connected between equivalent simplified model and peripheral structure.
As shown in figure 5, show that the present invention provides a kind of structural representation of the equivalent system of vehicle body Connector Model, simultaneously
In the lump with reference to shown in Fig. 6 to Figure 10, the equivalent system 1 of the vehicle body Connector Model includes：
Joint shell unit model extraction unit 10, the joint shell unit model equivalent for the extraction needs on white body model,
The joint shell unit model includes main split and secondary branch；
First rotational stiffness value acquiring unit 11, for entering row constraint to main split's end points in the joint shell unit model,
Apply the predetermined torque on three directions on secondary branch's end points, obtain the joint shell list corresponding to the torque in three directions
The rotational stiffness value of meta-model；
Joint rigidity model establishes unit 12, for being established according to joint shell unit model by main split's beam and secondary branch beam group
Into Joint rigidity model, in the Joint rigidity model, main split's beam uses staff cultivation with time branch beam junction
Be rigidly connected；
Second rotational stiffness value acquiring unit 13, for entering row constraint to the end points at main split's beam both ends, to described time point
Apply the predetermined torque on three directions identical with the first rotational stiffness value acquiring unit 11 on the end points at strutbeam both ends,
Obtain the rotational stiffness value of the Joint rigidity model corresponding to the torque in three directions；
Equivalent simplified model acquiring unit 14, in the Joint rigidity model, main split's beam to be connected with time branch beam
The constraint being in rotation direction replaces with the torsionspring group for including three torsionsprings, is connect according to foregoing each party is upward
The rotational stiffness value of head capsule model of element and the rotational stiffness value of Joint rigidity model are obtained corresponding to each torsionspring just
Angle value, so as to obtain the equivalent simplified model of vehicle body joint；
Replacement unit 15, in white body model, it is equivalent that the vehicle body joint equivalent simplified model to be replaced into the needs
Joint shell unit model.
Wherein, the joint shell unit model extraction unit 10 includes：
Interception unit 100, for from white body model extraction need equivalent joint shell unit model, from circular arc mistake during extraction
The straight flange region crossed beyond region is blocked, and each straight flange zone length retains predetermined length；
Definition unit 101, for branch longer in joint shell unit model to be defined as into main split, it will be connected with main split
Branch be defined as time branch.
Wherein, the first rotational stiffness value acquiring unit 11 includes：
First operating unit 110, staff cultivation is carried out for two end points to main split, loaded successively certainly on secondary branch's end points
By spending the rotating torque of the predetermined value on 4,5,6 directions, the upward angular displacement of each party is obtained respectively；
First computing unit 111, corresponded to upwards for obtaining each party according to the ratio of the upward torque of each party and angular displacement
Joint shell unit model rotational stiffness valueK SH4 、K SH5 WithK SH6 。
Wherein, the Joint rigidity model is established unit 12 and included：
Branch beam setting unit 120, it is firm for the main split in joint shell unit model and time branch's correspondence establishment joint
Property model in main split's beam and secondary branch beam, main split's beam it is corresponding using shell unit model with the section of time branch beam
Section on straight flange region；
Connection end point setting unit 121, in the primary and secondary branch beam junction, by the connection end point on main split's beam
Principal point is arranged to, the connection end point in secondary branch beam is arranged to time point, and the principal point is arranged to identical with time point
Coordinate；
Rigidity parameters setting unit 122, for the RBE2 connections of free degree 1-6 staff cultivation will to be used between principal point and secondary point.
Wherein, the second rotational stiffness value acquiring unit 13 includes：
Second operating unit 130, the end points for the both ends of main split's beam to rigid model carries out staff cultivation, in secondary branch beam
End points on load predetermined value rotating torque on the direction of the free degree 4,5,6 successively, obtain the upward angle position of each party respectively
Move；
Second computing unit 131, corresponded to upwards for obtaining each party according to the ratio of the upward torque of each party and angular displacement
Joint rigidity model rotational stiffness valueK R4 、K R5 WithK R6 。
Wherein, the equivalent simplified model acquiring unit 14 includes：
Rigid constraint changing unit 140, in the Joint rigidity model, by main split's beam and time branch beam junction
The RBE2 connection constraints frees degree are changed to 1-3；
Torsionspring group setting unit 141, in the Joint rigidity model, by main split's beam and time branch beam junction
Increase by a torsionspring group between tie point, the torsion spring group includes three independent and orthogonal torsionsprings；
3rd computing unit 142, it is corresponding in each torsionspring for obtaining the torsionspring group respectively using following formula
Spring stiffness valuesK S4 、K S5 WithK S6 ：
K S =1/(1/K SH -1/K R )
Wherein, it is describedK SH For the rotational stiffness value of joint shell unit modelK SH4 、K SH5 WithK SH6 ；It is describedK R For Joint rigidity model
Rotational stiffness valueK R4 、K R5 WithK R6 。
More details, the foregoing description to Fig. 1 to Fig. 4 is can refer to, herein without being described in detail.
Implement the embodiment of the present invention, there is following beneficial effect：
First, the computational efficiency of Car body model can be improved：Implement the equivalent method of vehicle body Connector Model provided by the invention or be
System, linker branches being subjected to primary and secondary division so that equivalent simplified model only needs a small amount of spring with regard to that can simulate the flexibility of joint,
Its simple in construction and parameter is less, can improve the computational efficiency for the mechanical characteristic for calculating vehicle body, meanwhile, joint equivalent-simplification mould
Type have on main free degree direction with shell unit model identical rotational stiffness, dramatically improve the equivalent essence of joint
Degree；
Secondly, the parametrization of Car body model is advantageous to：The joint equivalent simplified model that the present invention obtains is by one-dimensional beam element（Main point
Strutbeam and time branch beam）、RBE2（It is rigidly connected）Formed with torsionspring group, connection end point is carried out in joint equivalent simplified model
Concurrent processing（There is identical coordinate difference）, the translation direction of RBE2 constraint connections（Free degree 1-3）, length is 0
The rotation direction of torsionspring group control connection（Free degree 4-6）, it is simple to operate and realize be hinged processing truly；
A small amount of parameter, which need to only be extracted, can be obtained parameterizing Connector Model, and each joint is more conducive to the parametrization of Car body model after equivalent
Processing；
Furthermore it is possible to instruct the design work of vehicle body joint：The structure for the joint equivalent model that the present invention obtains and shell unit mould
Type is more consistent, and the one-dimensional beam element and spring stiffness values of equivalent simplified model are optimized according to rotational stiffness value,
Cross section property and bonding strength of linker branches etc. are obtained, so as to instruct the design work of joint.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of not departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (12)
1. a kind of equivalent method of vehicle body Connector Model, it is characterised in that comprise the following steps：
Extraction needs equivalent joint shell unit model on white body model, the joint shell unit model include main split with
And secondary branch；
Row constraint is entered to main split's end points in the joint shell unit model, applies three directions on secondary branch's end points
On predetermined torque, obtain three directions torque corresponding to joint shell unit model rotational stiffness value；
The Joint rigidity model being made up of main split's beam and secondary branch beam is established according to joint shell unit model, in the joint
In rigid model, main split's beam being rigidly connected using staff cultivation with time branch beam junction；
Row constraint is entered to the end points at main split's beam both ends, applied and to main split on the free end points of the secondary branch beam
End points enters the predetermined torque on identical three directions in row constraint, obtains the Joint rigidity model corresponding to the torque in three directions
Rotational stiffness value；
In the Joint rigidity model, main split's beam and time constraint of the branch beam junction in rotation direction are replaced with into bag
Include the torsionspring group of three torsionsprings, according to the rotational stiffness value of the upward joint shell unit model of foregoing each party and
The rotational stiffness value of Joint rigidity model obtains rigidity value corresponding to each torsionspring, so as to obtain the equivalent letter of vehicle body joint
Change model；
In white body model, the vehicle body joint equivalent simplified model is replaced into the equivalent joint shell unit mould of the needs
Type.
2. the equivalent method of vehicle body Connector Model as claimed in claim 1, it is characterised in that described extracted on white body needs
The step of wanting joint shell unit model be specially：
Extraction needs equivalent joint shell unit model from white body model, straight flange during extraction beyond arc transition region
Region is blocked, and each straight flange zone length retains predetermined length, and wherein longer branch is defined as into main split,
The branch being connected with main split is defined as time branch.
3. the equivalent method of vehicle body Connector Model as claimed in claim 2, it is characterised in that the power for obtaining three directions
The step of rotational stiffness value of joint shell unit model corresponding to square is specially：
Staff cultivation is carried out to two end points of main split, loaded successively on secondary branch's end points predetermined on three degree of freedom direction
The rotating torque of numerical value, the upward angular displacement of each party is obtained respectively；
Obtaining each party according to the upward torque of each party and the ratio of angular displacement, corresponding joint shell unit model turns upwards
Dynamic stiffness valueK SH4 、K SH5 WithK SH6 。
4. the equivalent method of vehicle body Connector Model as claimed in claim 2 or claim 3, it is characterised in that described according to joint shell list
Meta-model establish be made up of rigidly connected one-dimensional beam element Joint rigidity model the step of be specially：
Main split in joint shell unit model and main split's beam in time branch's correspondence establishment Joint rigidity model and
The section of secondary branch beam, main split's beam and time branch beam corresponds to the section on straight flange region using shell unit model；
In the primary and secondary branch beam junction, the connection end point on main split's beam is arranged to principal point, positioned at secondary branch beam
On connection end point be arranged to time point, the principal point is arranged to identical coordinate with time point；
Using the RBE2 connections of the staff cultivation on six-freedom degree direction between principal point and secondary point.
5. the equivalent method of vehicle body Connector Model as claimed in claim 4, it is characterised in that the power for obtaining three directions
The step of rotational stiffness value of Joint rigidity model corresponding to square is specially：
Staff cultivation is carried out to the end points at the both ends of main split's beam of rigid model, loads three successively on the end points of secondary branch beam
Predetermined value rotating torque on free degree direction, the upward angular displacement of each party is obtained respectively；
The rotation of each party's corresponding Joint rigidity model upwards is obtained according to the upward torque of each party and the ratio of angular displacement
Rigidity valueK R4 、K R5 WithK R6 。
6. the equivalent method of vehicle body Connector Model as claimed in claim 5, it is characterised in that it is described obtain vehicle body joint etc.
Imitate simplified model the step of be specially：
In the Joint rigidity model, main split's beam and time branch beam junction RBE2 connection constraints frees degree are changed to three
It is individual；
In the Joint rigidity model, main split's beam and secondary branch beam junction are increased into by a torsionspring between tie point
Group, the torsion spring group include three independent and orthogonal torsionsprings；
Spring stiffness values corresponding to each torsionspring in the torsionspring group are obtained respectively using following formulaK S4 、K S5 WithK S6 ：
K S =1/(1/K SH -1/K R )
Wherein, it is describedK SH For the rotational stiffness value of joint shell unit modelK SH4 、K SH5 WithK SH6 ；It is describedK R For Joint rigidity model
Rotational stiffness valueK R4 、K R5 WithK R6 。
A kind of 7. equivalent system of vehicle body Connector Model, it is characterised in that including：
Joint shell unit model extraction unit, the joint shell unit model equivalent for the extraction needs on white body model, institute
Stating joint shell unit model includes main split and secondary branch；
First rotational stiffness value acquiring unit, for entering row constraint to main split's end points in the joint shell unit model,
Apply the predetermined torque on three directions on secondary branch's end points, obtain the joint shell unit corresponding to the torque in three directions
The rotational stiffness value of model；
Joint rigidity model establishes unit, is made up of for being established according to joint shell unit model main split's beam and secondary branch beam
Joint rigidity model, in the Joint rigidity model, main split's beam is with time branch beam junction using staff cultivation
It is rigidly connected；
Second rotational stiffness value acquiring unit, for entering row constraint to the end points at main split's beam both ends, to the secondary branch
Apply the predetermined torque on three directions identical with the first rotational stiffness value acquiring unit on the end points at beam both ends, obtain
The rotational stiffness value of Joint rigidity model corresponding to the torque in three directions；
Equivalent simplified model acquiring unit, in the Joint rigidity model, by main split's beam and time branch beam junction
Constraint in rotation direction replaces with the torsionspring group for including three torsionsprings, according to the upward joint of foregoing each party
The rotational stiffness value of shell unit model and the rotational stiffness value of Joint rigidity model obtain rigidity corresponding to each torsionspring
Value, so as to obtain the equivalent simplified model of vehicle body joint；
Replacement unit, in white body model, it is equivalent that the vehicle body joint equivalent simplified model to be replaced into the needs
Joint shell unit model.
8. the equivalent system of vehicle body Connector Model as claimed in claim 7, it is characterised in that the joint shell unit model carries
Unit is taken to include：
Interception unit, for from white body model extraction need equivalent joint shell unit model, from arc transition during extraction
Straight flange region beyond region is blocked, and each straight flange zone length retains predetermined length；
Branch's definition unit, for branch longer in joint shell unit model to be defined as into main split, it will be connected with main split
The branch connect is defined as time branch.
9. the equivalent system of vehicle body Connector Model as claimed in claim 7, it is characterised in that the first rotational stiffness value obtains
Unit is taken to include：
First operating unit, staff cultivation is carried out for two end points to main split, three are loaded successively on secondary branch's end points
The rotating torque of predetermined value on free degree direction, the upward angular displacement of each party is obtained respectively；
First computing unit, for being connect according to corresponding to the ratio of the upward torque of each party and angular displacement acquisition each party is upward
The rotational stiffness value of head capsule model of elementK SH4 、K SH5 WithK SH6 。
10. the equivalent system of vehicle body Connector Model as claimed in claim 8 or 9, it is characterised in that the Joint rigidity model
Establishing unit includes：
Branch beam setting unit, for the main split in joint shell unit model and time branch's correspondence establishment Joint rigidity mould
Main split's beam and secondary branch beam in type, main split's beam correspond to straight flange with the section of time branch beam using shell unit model
Section on region；
Connection end point setting unit, in the primary and secondary branch beam junction, the connection end point on main split's beam to be set
Principal point is set to, the connection end point in secondary branch beam is arranged to time point, and the principal point is arranged to identical seat with time point
Mark；
Rigidity parameters setting unit, for the RBE2 of the staff cultivation used between principal point and secondary point on six-freedom degree direction to be connected
Connect.
11. the equivalent system of vehicle body Connector Model as claimed in claim 10, it is characterised in that the second rotational stiffness value
Acquiring unit includes：
Second operating unit, the end points for the both ends of main split's beam to rigid model carries out staff cultivation, in secondary branch beam
The predetermined value rotating torque on three degree of freedom direction is loaded on end points successively, obtains the upward angular displacement of each party respectively；
Second computing unit, for being connect according to corresponding to the ratio of the upward torque of each party and angular displacement acquisition each party is upward
The rotational stiffness value of head rigid modelK R4 、K R5 WithK R6 。
12. the equivalent system of vehicle body Connector Model as claimed in claim 11, it is characterised in that the equivalent simplified model obtains
Unit is taken to include：
Rigid constraint changing unit, in the Joint rigidity model, by main split's beam and time branch beam junction RBE2
The connection constraints free degree is changed to three；
Torsionspring group setting unit, in the Joint rigidity model, main split's beam and time branch beam junction to be existed
Increase by a torsionspring group between tie point, the torsion spring group includes three independent and orthogonal torsionsprings；
3rd computing unit, for obtaining the torsionspring group respectively in bullet corresponding to each torsionspring using following formula
Spring rigidity valueK S4 、K S5 WithK S6 ：
K S =1/(1/K SH -1/K R )
Wherein, it is describedK SH For the rotational stiffness value of joint shell unit modelK SH4 、K SH5 WithK SH6 ；It is describedK R For Joint rigidity model
Rotational stiffness valueK R4 、K R5 WithK R6 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710658957.9A CN107526878B (en) | 2017-08-04 | 2017-08-04 | Equivalent method and system of vehicle body joint model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710658957.9A CN107526878B (en) | 2017-08-04 | 2017-08-04 | Equivalent method and system of vehicle body joint model |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107526878A true CN107526878A (en) | 2017-12-29 |
| CN107526878B CN107526878B (en) | 2021-01-15 |
Family
ID=60680587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710658957.9A Active CN107526878B (en) | 2017-08-04 | 2017-08-04 | Equivalent method and system of vehicle body joint model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107526878B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107832527A (en) * | 2017-11-09 | 2018-03-23 | 广州汽车集团股份有限公司 | A kind of vehicle body equivalent simplified model method for building up and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455251A (en) * | 2010-10-22 | 2012-05-16 | 上海汽车集团股份有限公司 | Automotive body in white torsion rigidity test system and method thereof |
| CN104091002A (en) * | 2014-06-27 | 2014-10-08 | 奇瑞汽车股份有限公司 | Establishment method and device for automobile body connector model |
-
2017
- 2017-08-04 CN CN201710658957.9A patent/CN107526878B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455251A (en) * | 2010-10-22 | 2012-05-16 | 上海汽车集团股份有限公司 | Automotive body in white torsion rigidity test system and method thereof |
| CN104091002A (en) * | 2014-06-27 | 2014-10-08 | 奇瑞汽车股份有限公司 | Establishment method and device for automobile body connector model |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107832527A (en) * | 2017-11-09 | 2018-03-23 | 广州汽车集团股份有限公司 | A kind of vehicle body equivalent simplified model method for building up and system |
| CN107832527B (en) * | 2017-11-09 | 2021-05-18 | 广州汽车集团股份有限公司 | Method and system for establishing equivalent simplified model of vehicle body |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107526878B (en) | 2021-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103132506B (en) | Bored pile double-deck Reinforced Hoop reinforcing cage processing and fabricating method | |
| CN107832527A (en) | A kind of vehicle body equivalent simplified model method for building up and system | |
| CN104408765B (en) | plant scanning and reconstruction method | |
| CN108563878A (en) | Multi-functional welding structure Calculation of Fatigue Life confirms integrated integrated system with welding quality grade | |
| CN107526878A (en) | A kind of equivalent method and system of vehicle body Connector Model | |
| CN102930599A (en) | Hand motion three-dimensional simulation method based on dual quaternion | |
| CN209443666U (en) | Column surrounding hoop reinforcement for steel reinforced concrete earthquake-resistant reinforcement structure | |
| CN106012795B (en) | Bielliptic(al) moulding Cable-stayed Bridge Pylon crosses structure | |
| Izmest'ev et al. | Contractions of Lie algebras and the separation of variables: interbase expansions | |
| Jenkel et al. | Simulation of failure in timber with structural inhomogeneities using an automated FE analysis | |
| CN108393872A (en) | A kind of anthropomorphic robot waist joint based on 3-RRR sphere parallel mechanisms | |
| CN106326502A (en) | Computation method for static rigidity of support | |
| CN108520137B (en) | Plane node coupling processing method suitable for space truss structure | |
| CN204716847U (en) | Cylinder type rubber vibration isolator | |
| CN207110530U (en) | A kind of civil engineering support meanss | |
| CN102622457A (en) | Method for establishing joint simplifying model by use of spring and rigid beam in stage | |
| CN206284726U (en) | A kind of foldable flower stand | |
| Godthelp et al. | The timber Reciprocal Frame Designer: free form design to production | |
| CN204239888U (en) | A kind of cable-stayed type integrated pipe frame | |
| CN107351123A (en) | A kind of robot arm | |
| KR101271863B1 (en) | Articulation apparatus and connection apparatus using the same | |
| CN106425682A (en) | Control system for drill postures of parallel drilling device and control method thereof | |
| CN206769159U (en) | A kind of spheroid steel frame construction of astronomical dome | |
| CN207550166U (en) | A kind of shift fork control stick | |
| CN201857621U (en) | Movable arm of excavator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |