CN106372349B - Construct driver leg fast parameter design methods and system - Google Patents
Construct driver leg fast parameter design methods and system Download PDFInfo
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- CN106372349B CN106372349B CN201610810517.6A CN201610810517A CN106372349B CN 106372349 B CN106372349 B CN 106372349B CN 201610810517 A CN201610810517 A CN 201610810517A CN 106372349 B CN106372349 B CN 106372349B
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Abstract
The present invention relates to a kind of building driver leg fast parameter design methods and systems, belong to automotive crash safety field.It include: to establish leg skin geometrical model；On the basis of the leg skin geometrical model, equivalentization processing is carried out to musculature, knee joint structure and skeletal structure, obtains leg geometrical model；Respectively to the skin texture in the geometrical model of leg, skeletal structure, myoarchitecture and the knee joint structure of equivalentization are arranged physical attribute, obtain driver leg finite element model；Parameters Optimal Design driver leg finite element model: advanced optimizing leg finite element model relevant parameter, can greatly reduce and calculate the time, automotive safety simulation analysis computational efficiency is promoted, to solve the problems, such as that existing finite element model computational efficiency is low.
Description
Technical field
The present invention relates to automotive crash safety fields, construct driver leg fast parameter design methods and system.
Background technique
As one of most important invention of 20th century mankind, automobile offers convenience automobile to mankind's communications and transportation and life
While, the following motor traffic accidents also starts to endanger the life security of the mankind, thus, it is carried out in traffic accident
Occupant injury degree research improves to carry out specific aim to ensure that safety also becomes more and more important.American National automobile is adopted
Sample system (National Automotive Sampling System, NASS) statistics display, in each site tissue damage of occupant,
About 1/5 occupant injury and 4/5 pedestrian injuries include leg impairment, and leg impairment occupies the in each site tissue damage of occupant
Two.It is and for statistical analysis as the result is shown in the degree of impairment of preceding collision to the occupant under by safety belt and air bag protection: leg
Damage accounts for the 36% of whole AIS 2+ damages, is more than head, chest as most vulnerable position in preceding collision.Though leg impairment
Occupant's death is not will lead to generally so, but convalescence is long, and the huge pain of injury can be brought to the wounded, the damage of leg is also frequent
The chance that the wounded escapes in accident can be delayed, so that research protection driver leg damage method is of great significance.
Current leg impairment research model mainly uses flexible material to simulate the tissues such as bone, muscle, skin,
Datail description, material model biology fidelity, grid quality and quantity, it is comprehensive in terms of gradually improved,
Not only leg power characteristic can have been analyzed but also Stress distribution can be analyzed, economical good, the strong advantage of repeatability.But by
The modeling method that there is high fidelity with tissue is used in model, so that grid or element number that model includes are very huge
Greatly, there is the deficiency that modeling difficulty is big, computational efficiency is low and the calculating time is long.
Summary of the invention
The purpose of the present invention is to provide a kind of building driver leg fast parameter design methods and systems, solve
The problems such as upper finite element model computational efficiency of the existing technology is low.The invention patent both can be used for driver leg power
Research is learned, and leg impairment and Stress distribution can be simulated, calculates time-consuming less, it is high-efficient.
Above-mentioned purpose of the invention is achieved through the following technical solutions:
Construct driver leg fast parameter design methods, comprising:
(1), leg skin geometrical model is established；
(2), on the basis of leg skin geometrical model, myoarchitecture, knee joint structure and skeletal structure are carried out etc.
Effectization processing, obtains leg geometrical model；
(3), respectively to the skin texture in the geometrical model of leg, skeletal structure, myoarchitecture and the knee joint of equivalentization
Structure setting unit physical attribute, obtains driver leg finite element model；
(3.1), shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
(3.2), beam element attribute assignment is carried out to the skeletal structure of equivalentization；
(3.3), torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
(4), Parameters Optimal Design driver leg finite element model: on each striped cross-sectional, torsionspring is carried out respectively
With drawing-pressing spring cell attribute assignment, with the myoarchitecture of the analog equivalent bone knot with skin texture and equivalentization respectively
The connection of structure, and pair cross-section parameter, spring parameter optimize.
Carrying out equivalentization processing to myoarchitecture, knee joint structure and skeletal structure described in step (2) includes:
(2.1), in the geometrical model of leg, the striped cross-sectional for adding predetermined quantity carries out at equivalentization myoarchitecture
Reason；
(2.2), in the geometrical model of leg, equivalentization processing is carried out to skeletal structure using girder construction；
(2.3), at adjacent two bone, equivalentization processing is carried out to knee joint structure using cluster spring.
Shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation described in step (3.1)
It include: the physical attributes such as area of section, density, elasticity modulus, the Poisson's ratio of selection；Wherein, leg skin using shell unit into
Row simulation, material selection elastic material, thickness of shell elements are identical as skin thickness.
Torsionspring and drawing-pressing spring in striped cross-sectional described in step (4) is symmetrical, wherein drawing-pressing spring is non-
Linear drawing-pressing spring, torsionspring are nonlinear torsion spring.
The building driver leg fast parameter design methods, step further include:
It is run after the angle of the fixation between two beam elements in initialization driver leg finite element model, obtains leg
Stress distribution.
Another object of the present invention is to provide a kind of building driver leg fast parameter modelling systems, comprising:
Skin geometrical model constructs module, leg geometrical model building module, cell attribute setup module and finite element model optimization
Module, the skin geometrical model building module are connected with leg geometrical model building module, and leg geometrical model constructs module
It is connected with cell attribute setup module, cell attribute setup module is connected with finite element model optimization module；
The skin geometrical model constructs module, for establishing leg skin geometrical model；
The leg geometrical model constructs module, on the basis of the leg skin geometrical model established, to muscle
Structure, knee joint structure and skeletal structure carry out equivalentization processing, obtain leg geometrical model；
The cell attribute setup module, for respectively to the skin texture in the geometrical model of leg, the bone of equivalentization
Structure, myoarchitecture and knee joint structure setting unit physical attribute, comprising:
Shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
Beam element attribute assignment is carried out to the skeletal structure of equivalentization；
Torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
On each striped cross-sectional, torsionspring and drawing-pressing spring cell attribute assignment are carried out, respectively with analog equivalent
The myoarchitecture connection with skin texture and the skeletal structure of equivalentization respectively；
The finite element model optimization module carries out grid dividing for the geometrical model to leg girder construction, to occupant
Leg finite element model carries out Parameters Optimal Design, obtains driver leg finite element model；
The described leg geometrical model building module include: the first equivalent process unit, the second equivalent process unit and
Third equivalent processing unit, the third equivalent processing unit respectively with the first equivalent process unit and the second equivalent process list
Member is connected；
First equivalent process unit, for carrying out equivalentization to skeletal structure using girder construction in the geometrical model of leg
Processing；
Second equivalent process unit, for adding the striped cross-sectional of predetermined quantity to muscle knot in the geometrical model of leg
Structure carries out equivalentization processing；
Third equivalent processing unit, for being carried out using cluster spring to knee joint structure equivalent at adjacent two bone
Change processing.
It includes: to select that skin texture in the leg skin geometrical model to foundation, which carries out shell unit attribute assignment,
The physical attributes such as area of section, density, elasticity modulus, Poisson's ratio；Wherein, leg skin is simulated using shell unit, material
Material selects elastic material, and thickness of shell elements is identical as skin thickness.
Torsionspring and drawing-pressing spring in the striped cross-sectional is symmetrical, wherein drawing-pressing spring is non-linear drawing
Pressing spring, torsionspring are nonlinear torsion spring.
The building driver leg fast parameter modelling system, further includes computing module, is multiplied for initializing
It is run after the angle between two beam elements in the finite element model of member leg, obtains leg-stress distribution.
The beneficial effects of the present invention are: by establishing leg skin geometrical model；On leg skin geometrical model basis
On, equivalentization processing is carried out to myoarchitecture, knee joint structure and skeletal structure, obtains leg geometrical model；Respectively leg
Skin texture in portion's geometrical model, skeletal structure, myoarchitecture and the knee joint structure setting unit physical attribute of equivalentization,
Obtain driver leg finite element model；Parameters Optimal Design driver leg finite element model can greatly reduce and calculate the time,
It is able to ascend automotive safety simulation analysis computational efficiency, is able to solve the low problem of existing finite element model computational efficiency.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative example and its explanation is used to explain the present invention, and is not constituted improper limitations of the present invention.
Fig. 1 is flow diagram of the invention；
Fig. 2 is the skeletal structure schematic diagram of the invention simulated using beam element；
Fig. 3 is the knee joint structure schematic diagram of the invention using cluster spring unit simulation；
Fig. 4 is connection relationship structure of the cluster spring in same striped cross-sectional of torsionspring and drawing-pressing spring of the invention
Schematic diagram；
Fig. 5 is in more striped cross-sectionals of the invention, with K in striped cross-sectionaliThe cluster spring in the direction-P constitutes schematic diagram；
Fig. 6 is the leg geometrical model structural schematic diagram of the embodiment of the present invention；
Fig. 7 is the module connection relationship diagram of present invention building driver leg fast parameter modelling system.
Specific embodiment
Detailed content and its specific embodiment of the invention are further illustrated with reference to the accompanying drawing.
Referring to shown in Fig. 1 to Fig. 7, building driver leg fast parameter design methods of the invention, comprising:
(1), leg skin geometrical model is established；
(2), on the basis of leg skin geometrical model, myoarchitecture, knee joint structure and skeletal structure are carried out etc.
Effectization processing, obtains leg geometrical model；
(3), respectively to the skin texture in the geometrical model of leg, skeletal structure, myoarchitecture and the knee joint of equivalentization
Structure setting unit physical attribute, obtains driver leg finite element model；
(3.1), shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
(3.2), beam element attribute assignment is carried out to the skeletal structure of equivalentization；
(3.3), torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
(4), Parameters Optimal Design driver leg finite element model: on each striped cross-sectional, torsionspring is carried out respectively
With drawing-pressing spring cell attribute assignment, with the myoarchitecture of the analog equivalent bone knot with skin texture and equivalentization respectively
The connection of structure, and pair cross-section parameter, spring parameter optimize.
Carrying out equivalentization processing to myoarchitecture, knee joint structure and skeletal structure described in step (2) includes:
(2.1), in the geometrical model of leg, the striped cross-sectional for adding predetermined quantity carries out at equivalentization myoarchitecture
Reason；
(2.2), in the geometrical model of leg, equivalentization processing is carried out to skeletal structure using girder construction；
(2.3), at adjacent two bone, equivalentization processing is carried out to knee joint structure using cluster spring.
Shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation described in step (3.1)
It include: the physical attributes such as area of section, density, elasticity modulus, the Poisson's ratio of selection；Wherein, leg skin using shell unit into
Row simulation, material selection elastic material, thickness of shell elements are identical as skin thickness.
Torsionspring and drawing-pressing spring in striped cross-sectional described in step (4) is symmetrical, wherein drawing-pressing spring is non-
Linear drawing-pressing spring, torsionspring are nonlinear torsion spring.
The building driver leg fast parameter design methods, step further include:
It is run after the angle of the fixation between two beam elements in initialization driver leg finite element model, obtains leg
Stress distribution.
The present invention constructs driver leg fast parameter modelling system, comprising: skin geometrical model constructs module, leg
Portion's geometrical model constructs module, cell attribute setup module and finite element model optimization module, the skin geometrical model structure
Modeling block is connected with leg geometrical model building module, and leg geometrical model building module is connected with cell attribute setup module,
Cell attribute setup module is connected with finite element model optimization module；
The skin geometrical model constructs module, for establishing leg skin geometrical model；
The leg geometrical model constructs module, on the basis of the leg skin geometrical model established, to muscle
Structure, knee joint structure and skeletal structure carry out equivalentization processing, obtain leg geometrical model；
The cell attribute setup module, for respectively to the skin texture in the geometrical model of leg, the bone of equivalentization
Structure, myoarchitecture and knee joint structure setting unit physical attribute, comprising:
Shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
Beam element attribute assignment is carried out to the skeletal structure of equivalentization；
Torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
On each striped cross-sectional, torsionspring and drawing-pressing spring cell attribute assignment are carried out, respectively with analog equivalent
The myoarchitecture connection with skin texture and the skeletal structure of equivalentization respectively；
The finite element model optimization module carries out grid dividing for the geometrical model to leg girder construction, to occupant
Leg finite element model carries out Parameters Optimal Design, obtains driver leg finite element model；
The described leg geometrical model building module include: the first equivalent process unit, the second equivalent process unit and
Third equivalent processing unit, the third equivalent processing unit respectively with the first equivalent process unit and the second equivalent process list
Member is connected；
First equivalent process unit, for carrying out equivalentization to skeletal structure using girder construction in the geometrical model of leg
Processing；
Second equivalent process unit, for adding the striped cross-sectional of predetermined quantity to muscle knot in the geometrical model of leg
Structure carries out equivalentization processing；
Third equivalent processing unit, for being carried out using cluster spring to knee joint structure equivalent at adjacent two bone
Change processing.
It includes: to select that skin texture in the leg skin geometrical model to foundation, which carries out shell unit attribute assignment,
The physical attributes such as area of section, density, elasticity modulus, Poisson's ratio；Wherein, leg skin is simulated using shell unit, material
Material selects elastic material, and thickness of shell elements is identical as skin thickness.
Torsionspring and drawing-pressing spring in the striped cross-sectional is symmetrical, wherein drawing-pressing spring is non-linear drawing
Pressing spring, torsionspring are nonlinear torsion spring.
The building driver leg fast parameter modelling system, further includes computing module, is multiplied for initializing
It is run after the angle between two beam elements in the finite element model of member leg, obtains leg-stress distribution.
Embodiment one:
Building driver leg fast parameter design methods shown in Figure 1, of the invention, comprising:
Step 1: establishing leg skin geometrical model；
In the present embodiment, driver leg geometrical model is constituted by skin, muscle, knee joint and bone, wherein muscular position
Between skin and bone, skin is the outermost layer of leg geometrical model.
In the present embodiment, leg skin geometrical model is established described in step 1 includes:
Step 1.1, leg skin geometrical property parameter is determined by CT scan data；
In the present embodiment, geometrical property parameter includes but is not limited to: exterior contour size and skin thickness, wherein outer
Contouring size refers to the outer profile of leg.
Step 1.2, geometrical model is established according to leg skin geometrical property parameter.
In the present embodiment, the exterior contour size and skin thickness obtained according to scan data constructs leg skin geometry
Model, wherein the space between the skin thickness of front and back is the space of muscle, knee joint and bone.
In the present embodiment, as an alternative embodiment, skin thickness d1=1mm.
Step 2, on the basis of leg skin geometrical model, myoarchitecture, knee joint structure and skeletal structure are carried out
Equivalentization processing, obtains leg geometrical model；
In the present embodiment, as an alternative embodiment, myoarchitecture, knee joint structure and skeletal structure are carried out equivalent
Change is handled
In the leg geometrical model, the striped cross-sectional for adding predetermined quantity carries out equivalentization processing to myoarchitecture；
In the leg geometrical model, equivalentization processing is carried out to skeletal structure using girder construction；
At adjacent two bone, equivalentization processing is carried out to knee joint structure using cluster spring.
Step 3, the skin texture respectively in the geometrical model of leg, skeletal structure, myoarchitecture and the knee of equivalentization close
Section structure setting unit physical attribute；
It is respectively the skin knot in the geometrical model of leg as an alternative embodiment, described in step 3 in the present embodiment
Structure, skeletal structure, myoarchitecture and the knee joint structure setting unit physical attribute of equivalentization include:
3.1, shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
In the present embodiment, cell attribute assignment includes: the material and material properties of the unit of selection, selection.Wherein, leg
Portion's skin is simulated using shell unit, and material selection elastic material, thickness of shell elements is identical as skin thickness, elastic material category
Property setting are as follows:
RO=1000kg/m 3 、E=22MPa 、PR=0.3,
Wherein,
ROFor density of material；
EFor Young's modulus；
PRFor Poisson's ratio.
3.2, beam element attribute assignment is carried out to the skeletal structure of equivalentization；
In the present embodiment, the skeletal structure of equivalentization includes: femur and shin bone, according to driver leg bone in traffic thing
Deformation mechanism in therefore, can bear to stretch using girder construction, torsion, bending deformation the characteristics of, distinguish equivalent moulds with two beams
Quasi- femur and bone anatomy, i.e., with the femur of a beam element analog equivalent, with the shin bone of another beam element analog equivalent.
In the present embodiment, beam element selects elastic-plastic material, relevant parameter, for example, structure physical parameter and geometric parameters
Number etc. can be obtained by experiment analog form.
It is shown in Figure 2, to utilize the skeletal structure schematic diagram of beam element simulation.
3.3, torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
In the present embodiment, using the knee joint knot of the combining form analog equivalent of a torsionspring and a drawing-pressing spring
Structure, torsionspring are used to the knee joint structure torsional deflection of analog equivalent, and drawing-pressing spring is used to the knee joint of analog equivalent
The displacement of structure axial direction impact direction.
It is shown in Figure 3, to utilize the knee joint structure schematic diagram of cluster spring unit simulation.
3.4, on each striped cross-sectional, torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively, with simulation etc.
The connection with skin texture and the skeletal structure of equivalentization respectively of the myoarchitecture of effectization.
In the present embodiment, on the striped cross-sectional of predetermined quantity, on each striped cross-sectional, one or more torsions are set
The combining form of spring and drawing-pressing spring, myoarchitecture to the analog equivalent bone with skin texture and equivalentization respectively
The connection of bone structure.Using the combining form of torsionspring and drawing-pressing spring, the change of myoarchitecture axial impact can be not only simulated
Shape, while the bending deformation in collision process can also be described.
It is shown in Figure 4, it is connection relationship knot of the cluster spring in same striped cross-sectional of torsionspring and drawing-pressing spring
Structure schematic diagram.Wherein " preceding ": it represents immediately ahead of leg, behind " rear " expression leg, θiRepresent turning for i-th of virtual torsionspring
Angle.In the present embodiment, it is contemplated that the difference of impact site and deformed region, using cluster spring (unit) number phase immediately ahead of leg
To intensive, the relatively sparse layout type of cluster spring number behind leg, i.e. assembled unit can be used that front is slightly more, and rear portion is less slightly
Principle.
It is shown in Figure 5, it is in more striped cross-sectionals, with K in striped cross-sectionaliThe cluster spring in the direction-P constitutes schematic diagram.
Wherein, KiNode serial number on leg skin (i=1 ... N, N are spring number) is represented, P indicates that the node on the skeletal structure of leg is compiled
Number.
In the present embodiment, driver leg muscle deformation mechanism in traffic accident is analyzed, using along leg skeletal structure axis
To direction, in the assembled unit (spring) on one or more striped cross-sectionals of layered distribution, equivalent simulation myoarchitecture and its
The connection of its structure.
In the present embodiment, torsionspring is symmetrical with drawing-pressing spring, wherein and drawing-pressing spring is non-linear drawing-pressing spring,
Torsionspring is nonlinear torsion spring.
As an alternative embodiment, torsionspring and drawing-pressing spring both ends respectively with skin texture (shell unit) and bone knot
Structure (beam element) is connected using conode.
In the present embodiment, the assembled unit of torsionspring and drawing-pressing spring selects nonlinear spring material, by extracting leg
Portion's myoarchitecture collides force-displacement curve and moment-rotation relation, the relevant parameter of available nonlinear spring material.Its
In, it collides force-displacement curve and moment-rotation relation can be by impact simulation emulation experiment or driver leg collision experiment, theory
Derivation mode obtains.
It is shown in Figure 6, it is leg of embodiment of the present invention geometrical model structural schematic diagram.In figure, label 1 to 6 is occupant
The equivalent striped cross-sectional of muscle, 7 be skin, and 8 be femur, and 9 be shin bone.
Step 4: Parameters Optimal Design driver leg finite element model.
In the present embodiment, as an alternative embodiment, by with the drawing-pressing spring number of same striped cross-sectional, different striped cross-sectionals
Between interlamellar spacing be design variable parameter, using the collision force efficiency of leg structure as optimization aim, to driver leg finite element
Model optimizes.For example, deformable body connection type can be chosen, the conode between deformable body (flexible body) is realized
Connection.
In the present embodiment, to shell unit carry out grid dividing, bear collision shell unit front end mesh-density be greater than after
The mesh-density at end.
In the present embodiment, as an alternative embodiment, this method further include:
It is run after the angle between two beam elements in initialization driver leg finite element model, obtains leg-stress point
Cloth.
In the present embodiment, it is 66 that initial two beam element angles, which are arranged,0, unit junction is connected using conode.
The present embodiment, by proposing driver leg fast parameter modelling based on the thought that equivalent-simplification parameterizes
Method；Based on driver leg deformation mechanism and variant in traffic accident, beam and a series of spring assemblies are introduced to leg bone
Bone, knee joint and muscle carry out legal equivalents and simplify, and are greater than rear end using the mesh-density for the shell unit front end for bearing collision
The mode of mesh-density effectively reduces the grid number of calculating, using multiple design variable parameters, optimizes；Full
Under the premise of the dynamic response of sufficient leg model, computational efficiency is effectively increased, while being simulated using flexible material, considered
Damage and Stress distribution greatly reduce and calculate the time, are able to solve that existing finite element model computational efficiency is low asks
Topic.
Embodiment two:
Building driver leg fast parameter modelling system shown in Figure 7, of the invention, comprising: skin geometry
Model construction module 71, leg geometrical model building module 72, cell attribute setup module 73 and finite element model optimize mould
Block 74, wherein
Skin geometrical model constructs module 71 and is connected with leg geometrical model building module 72, and leg geometrical model constructs mould
Block 72 is connected with cell attribute setup module 73, and, cell attribute setup module 73 and 74 phase of finite element model optimization module
Even.
Skin geometrical model constructs module 71, for establishing leg skin geometrical model；
In the present embodiment, driver leg geometrical model is constituted by skin, muscle, knee joint and bone, wherein muscular position
Between skin and bone, skin is the outermost layer of leg geometrical model.
In the present embodiment, establishing leg skin geometrical model includes:
Leg skin geometrical property parameter is determined by CT scan data；
Geometrical model is established according to leg skin geometrical property parameter.
Leg geometrical model constructs module 72, is used on the basis of the leg skin geometrical model, to myoarchitecture, knee
Joint structure and skeletal structure carry out equivalentization processing, obtain leg geometrical model；
In the present embodiment, as an alternative embodiment, it includes: the first equivalent process list that leg geometrical model, which constructs module 72,
Member, the second equivalent process unit and third equivalent processing unit (not shown), wherein
Third equivalent processing unit is connected with the first equivalent process unit and the second equivalent process unit respectively.
First equivalent process unit, for adding the striped cross-sectional of predetermined quantity to flesh in the leg geometrical model
Meat structure carries out equivalentization processing；
Second equivalent process unit is used in the leg geometrical model, skeletal structure is carried out using girder construction etc.
Effectization processing；
Third equivalent processing unit, for being carried out using spring assembly to knee joint structure equivalent at adjacent two bone
Change processing.
Cell attribute setup module 73, for being respectively the skin texture in the geometrical model of leg, the bone knot of equivalentization
Structure, myoarchitecture and knee joint structure setting unit physical attribute；Skin texture respectively in the geometrical model of leg, equivalentization
Skeletal structure, myoarchitecture and knee joint structure setting unit physical attribute include:
Shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
Beam element attribute assignment is carried out to the skeletal structure of equivalentization；
Torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
On each layered section, torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively, with simulation etc.
The connection with skin texture and the skeletal structure of equivalentization respectively of the myoarchitecture of effectization；
In the present embodiment, as an alternative embodiment, cell attribute assignment include: the unit of selection, selection material with
And material properties.Wherein, leg skin is simulated using shell unit, material selection elastic material, thickness of shell elements and skin
Thickness is identical.
In the present embodiment, as an alternative embodiment, cell attribute setup module 73 includes: that list is arranged in cell attribute first
Member, the second setting unit of cell attribute, cell attribute third setting unit and the 4th setting unit of cell attribute (do not show in figure
Out), wherein
The 4th setting unit of cell attribute respectively with the first setting unit of cell attribute, the second setting unit of cell attribute with
And cell attribute third setting unit is connected.
The first setting unit of cell attribute carries out cell attribute for the skin in the leg skin geometrical model to foundation
Assignment；
The second setting unit of cell attribute carries out beam element attribute assignment for the skeletal structure to equivalentization；
Cell attribute third setting unit carries out torsionspring and tension and compression bullet for the knee joint structure to equivalentization respectively
Spring cell attribute assignment；
In the present embodiment, using the knee joint knot of the combining form analog equivalent of a torsionspring and a drawing-pressing spring
Structure, torsionspring are used to the knee joint structure torsional deflection of analog equivalent, and drawing-pressing spring is used to the knee joint of analog equivalent
The displacement of structure axial direction impact direction.
The 4th setting unit of cell attribute, for carrying out torsionspring and tension and compression respectively in each layered section
Spring unit attribute assignment, with the myoarchitecture of the analog equivalent company with skin texture and the skeletal structure of equivalentization respectively
It connects.
In the present embodiment, as an alternative embodiment, the torsionspring and drawing-pressing spring in striped cross-sectional are symmetrical,
In, drawing-pressing spring is non-linear drawing-pressing spring, and torsionspring is nonlinear torsion spring.
Finite element model optimization module 74, for carrying out grid dividing to leg geometrical model, to driver leg finite element
Model carries out Parametric designing, obtains driver leg finite element model.
In the present embodiment, the system further include:
Computing module 75, for being transported after initializing the angle between two beam elements in driver leg finite element model
Row obtains leg-stress distribution.
In the present embodiment, as an alternative embodiment, by with the drawing-pressing spring number of same striped cross-sectional, different striped cross-sectionals
Between interlamellar spacing be design variable parameter, using the collision force efficiency of leg structure as optimization aim, to driver leg finite element
Model optimizes optimization.For example, deformable body connection type can be chosen, the conode between deformable body (flexible body) is realized
Connection.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.
The foregoing is merely preferred embodiments of the invention, are not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.All any modification, equivalent substitution, improvement and etc. made for the present invention,
It should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of building driver leg fast parameter design methods, it is characterised in that: include:
(1), leg skin geometrical model is established；
(2), on the basis of leg skin geometrical model, equivalentization is carried out to myoarchitecture, knee joint structure and skeletal structure
Processing, obtains leg geometrical model；It is described that equivalentization processing packet is carried out to myoarchitecture, knee joint structure and skeletal structure
It includes:
(2.1), in the geometrical model of leg, the striped cross-sectional for adding predetermined quantity carries out equivalentization processing to myoarchitecture；
(2.2), in the geometrical model of leg, equivalentization processing is carried out to skeletal structure using girder construction；
(2.3), at adjacent two bone, equivalentization processing is carried out to knee joint structure using cluster spring；
(3), respectively to the skin texture in the geometrical model of leg, skeletal structure, myoarchitecture and the knee joint structure of equivalentization
Setting unit physical attribute obtains driver leg finite element model；
(3.1), shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
(3.2), beam element attribute assignment is carried out to the skeletal structure of equivalentization；
(3.3), torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
(4), Parameters Optimal Design driver leg finite element model: on each striped cross-sectional, torsionspring is carried out respectively and is drawn
Pressing spring cell attribute assignment, with the myoarchitecture of analog equivalent respectively with skin texture and the skeletal structure of equivalentization
Connection, and pair cross-section parameter, spring parameter optimize.
2. building driver leg fast parameter design methods according to claim 1, it is characterised in that: step
(3.1) it includes: selection that the skin texture in the leg skin geometrical model to foundation described in, which carries out shell unit attribute assignment,
Area of section, density, elasticity modulus, Poisson's ratio；Wherein, leg skin is simulated using shell unit, material selection elasticity material
Material, thickness of shell elements are identical as skin thickness.
3. building driver leg fast parameter design methods according to claim 1, it is characterised in that: step
(4) torsionspring in striped cross-sectional and drawing-pressing spring described in are symmetrical, wherein drawing-pressing spring is non-linear tension and compression bullet
Spring, torsionspring are nonlinear torsion spring.
4. building driver leg fast parameter design methods as claimed in any of claims 1 to 3, special
Sign is: step further include:
It is run after the angle of the fixation between two beam elements in initialization driver leg finite element model, obtains leg-stress
Distribution.
5. a kind of building driver leg fast parameter modelling system, it is characterised in that: include: the building of skin geometrical model
Module, leg geometrical model building module, cell attribute setup module and finite element model optimization module, the skin geometry
Model construction module is connected with leg geometrical model building module, and leg geometrical model constructs module and cell attribute setup module
It is connected, cell attribute setup module is connected with finite element model optimization module；
The skin geometrical model constructs module, for establishing leg skin geometrical model；
The leg geometrical model constructs module, on the basis of the leg skin geometrical model established, to myoarchitecture,
Knee joint structure and skeletal structure carry out equivalentization processing, obtain leg geometrical model；
The cell attribute setup module, for respectively to the skin texture in the geometrical model of leg, the skeletal structure of equivalentization,
Myoarchitecture and knee joint structure setting unit physical attribute, comprising:
Shell unit attribute assignment is carried out to the skin texture in the leg skin geometrical model of foundation；
Beam element attribute assignment is carried out to the skeletal structure of equivalentization；
Torsionspring and drawing-pressing spring cell attribute assignment are carried out respectively to the knee joint structure of equivalentization；
On each striped cross-sectional, torsionspring and drawing-pressing spring cell attribute assignment are carried out, respectively with the flesh of analog equivalent
The connection with skin texture and the skeletal structure of equivalentization respectively of meat structure；
The finite element model optimization module carries out grid dividing for the geometrical model to leg girder construction, to driver leg
Finite element model carries out Parameters Optimal Design, obtains driver leg finite element model；
The leg geometrical model building module includes: the first equivalent process unit, the second equivalent process unit and third
Equivalent process unit, the third equivalent processing unit respectively with the first equivalent process unit and the second equivalent process unit phase
Even；
The first equivalent process unit, for carrying out equivalentization to skeletal structure using girder construction in the geometrical model of leg
Processing；
Second equivalent process unit, in the geometrical model of leg, add the striped cross-sectional of predetermined quantity to myoarchitecture into
The processing of row equivalentization；
Third equivalent processing unit, for being carried out at equivalentization using cluster spring to knee joint structure at adjacent two bone
Reason.
6. building driver leg fast parameter modelling system according to claim 5, it is characterised in that: described
The area of section, close that shell unit attribute assignment includes: selection is carried out to the skin texture in the leg skin geometrical model of foundation
Degree, elasticity modulus, Poisson's ratio；Wherein, leg skin is simulated using shell unit, material selection elastic material, and shell unit is thick
It spends identical as skin thickness.
7. building driver leg fast parameter modelling system according to claim 5, it is characterised in that: described
Torsionspring and drawing-pressing spring in striped cross-sectional is symmetrical, wherein drawing-pressing spring is non-linear drawing-pressing spring, torsionspring
For nonlinear torsion spring.
8. the building driver leg fast parameter modelling system according to any one of claim 5 to 7, special
Sign is: further including computing module, after initializing the angle between two beam elements in driver leg finite element model
Operation obtains leg-stress distribution.
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