CN107577875A - A kind of suture type battenboard parametric Finite Element Modeling Method - Google Patents
A kind of suture type battenboard parametric Finite Element Modeling Method Download PDFInfo
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- CN107577875A CN107577875A CN201710798861.2A CN201710798861A CN107577875A CN 107577875 A CN107577875 A CN 107577875A CN 201710798861 A CN201710798861 A CN 201710798861A CN 107577875 A CN107577875 A CN 107577875A
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Abstract
The invention discloses a kind of suture type battenboard parametric Finite Element Modeling Method, comprise the following steps：(1) geometrical characteristic parameter of suture type battenboard, is obtained；(2) the finite element modeling characteristic parameter of suture type battenboard, is obtained；(3) suture type battenboard Data of Finite Element Model storehouse, is established using geometric match relation；(4) above-mentioned steps, are weaved into parametric modeling shell script to complete to build the FEM model of suture type battenboard.The modeling method of the present invention is in finite element modeling is carried out to suture type battenboard, using parametric modeling method, finite element analysis model of the suture type battenboard under the parametric variables such as different sizes, suture line density can fast, easily be obtained, and realized by MATLAB and MSC.PCL language interactive programming, and then effectively shorten modeling period, lift unit quality, improve analysis efficiency and analysis precision, efficient, the high accuracy analysis of suture type Composite Sandwich Plates can be realized.
Description
Technical field
The present invention relates to a kind of modeling of COMPOSITE FINITE ELEMENT, more particularly to a kind of suture type battenboard Parameters of Finite Element
Modeling method.
Background technology
Suture type battenboard is typically made up of upper and lower panel, laminboard layer and suture.Panel is frequently with high performance fibre
Woven composite is tieed up, it is excellent that it has that specific strength is high, specific stiffness is high, density is small, anti-fatigue performance is good, resistance to elevated temperatures is good etc.
Point, it is the main load-carrying construction of suture type battenboard；Laminboard layer uses light foam material, battenboard is had well
Heat-proof quality, and make panel away from neutral surface so that battenboard has excellent bending property；Suture uses high-intensity fiber
Material, panel and sandwich layer are stitched together in a thickness direction, are then molded by resin solidification, effectively enhance battenboard
The connection of face core, improve the Z-direction mechanical property of Sandwich structure.Many excellent properties more than, suture type battenboard
It is widely used in aerospace field.
Optimal Structure Designing is carried out to suture type battenboard, is to improve structure efficiency, at utmost plays structural behaviour
Necessary process.But because different suture line densities and suture angle Sandwich structure form are complicated, lack at present and suture type is pressed from both sides
The high efficiency factors finite element modeling method of core plate structure, it is difficult to realize that the optimization to suture type Composite Sandwich Plates is set
Meter.
It would therefore be highly desirable to solve the above problems.
The content of the invention
Goal of the invention：Greatly carried while suture type battenboard modeling accuracy is ensured it is an object of the invention to provide one kind
The suture type battenboard parametric Finite Element Modeling Method of high modeling efficiency.
Technical scheme：To realize object above, the invention discloses a kind of suture type battenboard parameterized finite element modeling
Method, comprise the following steps：
(1) geometrical characteristic parameter of suture type battenboard, is obtained；
(2) the finite element modeling characteristic parameter of suture type battenboard, is obtained；
(3) suture type battenboard Data of Finite Element Model storehouse, is established using geometric match relation；
(4) above-mentioned steps, are weaved into parametric modeling shell script to complete to build the finite element mould of suture type battenboard
Type.
Wherein, suture type battenboard includes upper and lower panel and the laminboard layer positioned at centre, the sandwich in the step (1)
Bonded by glue-line between layer and upper and lower panel, and be stitched into one with suture；The geometrical characteristic parameter includes suture type
The long L of battenboard, wide W, the thickness h of each layer of battenboardi, suture section radius R, suture line density M and suture angle, θ；Institute
Stating suture line density M is：
M=Mhj×Mzj
Wherein, MhjFor suture line-spacing, MzjFor suture needle gage.
Preferably, finite element modeling characteristic parameter includes in the step (2)：Suture type battenboard size of mesh opening m and folder
Reticulate layer n of the core plate per Rotating fieldsi；
Wherein suture type battenboard size of mesh opening m is：
M=max (x | x=Mhj/N,N∈N*∩ x | x=Mzj/N,N∈N*∩ x | x=mθ/N,N∈N*}∩{x|x≤
mmax})
In formula, max () is the maximum for seeking set interior element；X is the unit size for meeting single simulation analysis requirement, N
For any positive integer, N* is positive integer collection；mθTo meet the unit size of suture angle, θ, its formula is：mθ=H/tan θ, wherein
H is battenboard gross thickness, and θ is suture angle；mmaxTo meet the finite element unit full-size of calculating demand, its formula is：
In formula, min () is modulus of elasticity, h to ask the minimum value of set interior element, EiFor each thickness of suture type battenboard
Degree, j are the suture type battenboard number of plies, ρ is density of material, ωmaxFrequency is analyzed for highest, ν is Poisson's ratio；
Reticulate layer n of the battenboard per Rotating fieldsiFor：
In formula, hiFor each plate thickness, m is unit size.
Furthermore in the step (3), battenboard FEM model is established using hexahedral element first, to every Rotating fields
FEM model unit-nodal information matrix, node-coordinate information matrix and material properties information matrix are established, and matches phase
Unit information and nodal information between adjacent bed；Suture FEM model is established using two-dimensional cell again, establishes suture unit-section
Point information matrix, and suture unit information and nodal information are matched with battenboard unit information and nodal information.
Preferably, in the step (4), suture type battenboard FEM model is built using MSC.PCL language, selection is single
First card, material cards and node type of card, it is sequentially output unit-nodal information matrix, material properties matrix and node-seat
Matrix is marked to Nastran calculation documents；Terminate Nastran calculation documents to write, generate suture type battenboard FEM model.
Beneficial effect：Compared with prior art, the present invention has following remarkable advantage：The modeling method of the present invention is in opposite joint
Box-like battenboard is carried out in finite element modeling, using parametric modeling method, can fast, easily obtain suture type battenboard
Finite element analysis model under the parametric variables such as different sizes, suture line density, and handed over by MATLAB and MSC.PCL language
Mutual programming realization, and then effectively shorten modeling period, lift unit quality, improve analysis efficiency and analysis precision, it can realize
Efficient, the high accuracy analysis of suture type Composite Sandwich Plates.
Brief description of the drawings
Fig. 1 is suture type battenboard parameterized finite element modeling flow chart in the present invention；
Fig. 2 is the structural representation of suture type battenboard in the present invention；
Fig. 3 is the partial schematic diagram of suture type battenboard in the present invention；
Fig. 4 is to generate FEM model schematic diagram in the present invention.
Embodiment
Technical scheme is described further below in conjunction with the accompanying drawings.
As shown in figure 1, the present invention provides a kind of suture type battenboard parametric Finite Element Modeling Method, including following step
Suddenly：
(1) geometrical characteristic parameter of suture type battenboard, is obtained；
As shown in Fig. 2 suture type battenboard includes top panel 1, lower panel 2 and the laminboard layer 3 positioned at centre, the laminboard layer
Bonded by glue-line between 3 and top panel 1, lower panel 2, and be stitched into one with suture 4；The geometry of the suture type battenboard
Selection of dimension is 250mm × 300mm × 12mm, the i.e. long L=250mm of suture type battenboard, wide W=300mm, thick H=12mm,
The wherein thickness h of top panel1For 1mm, lower panel thickness h2For 1mm, laminboard layer thickness h3For 10mm, the section of suture
Radius R chooses 0.5mm, and using "Ji" type suture way, it is one that adjacent lines, which up and down staggeredly suture upper and lower panel and laminboard layer,
Body.
As shown in figure 3, in realistic model, suture type battenboard is typically bonded in the upper surface of primary load bearing plate 5, and the present invention is built
Corresponding primary load bearing Slab is found to meet actual mechanical environment, primary load bearing board size is 290mm × 340mm × 6mm.The present embodiment
For 45 °, suture line density M is the middle suture angle, θ used：
M=Mhj×Mzj
Wherein, suture line-spacing MhjFor 15mm, suture needle gage MzjFor 15mm, i.e. sewing density M is 15mm × 15mm.
Structural material attribute is as shown in table 1, table 2.
The panel of table 1 and core material attribute
The primary load bearing plate of table 2 and suture material attribute
(2) the finite element modeling characteristic parameter of suture type battenboard, is obtained；
Wherein finite element modeling characteristic parameter includes：The net of suture type battenboard size of mesh opening m and battenboard per Rotating fields
Compartment number ni；
(2.1) suture type battenboard size of mesh opening m is calculated first；
Obtain the suture type battenboard finite element unit size maximum m for meeting calculating demandmax, the present embodiment selection is most
High analyte frequency is 3500Hz, by can be calculated unit size mmaxFor 6.5mm, its calculation formula is：
In formula, min () is modulus of elasticity, h to ask the minimum value of set interior element, EiFor each thickness of suture type battenboard
Degree, j are the suture type battenboard number of plies, ρ is density of material, ωmaxFrequency is analyzed for highest, ν is Poisson's ratio；
Obtain the largest unit size m for meeting suture angle, θθ, the suture angle, θ that the present embodiment is chosen is 45 °, and calculating can
Obtain mθFor 12mm, wherein mθCalculation formula be：mθ=H/tan θ, wherein H are battenboard gross thickness, and θ is suture angle；
According to sewing density M, mmaxAnd mθ, suitable suture type battenboard size of mesh opening m is selected, circular is：
M=max (x | x=Mhj/N,N∈N*∩ x | x=Mzj/N,N∈N*∩ x | x=mθ/N,N∈N*}∩{x|x≤
mmax})
In formula, max () is the maximum for seeking set interior element；X is the unit size for meeting single simulation analysis requirement, N
For any positive integer, N* is positive integer collection；mθTo meet the unit size of suture angle, θ.Specifically use in the present embodiment
Sewing density is 15mm × 15mm, mmaxAnd mθRespectively 6.5mm and 12mm, then it is 3mm to choose rational size of mesh opening.
(2.2) reticulate layer n of the battenboard per Rotating fields in the present invention is calculatediFor：
In formula, hiFor each plate thickness, m is unit size, in the present embodiment the thickness of top panel be 1mm, the thickness of laminboard layer
The thickness spent for 10mm, lower panel is 1mm and the thickness of primary load bearing plate is 6mm, therefore designs top panel according to unit size
Reticulate layer is 1, the reticulate layer of laminboard layer is 3, the reticulate layer of lower panel is 1 and the reticulate layer of primary load bearing plate is 3.
(3) suture type battenboard Data of Finite Element Model storehouse, is established using geometric match relation, pressed from both sides first according to suture type
Relation between the geometrical property of core plate and each node, unit, using hexahedral element respectively to primary load bearing plate, top panel, folder
Sandwich layer and lower panel carry out element number, node serial number, establish FEM model unit-nodal information matrix, node-coordinate letter
Matrix and material properties information matrix are ceased, and matches adjacent interlayer unit information and nodal information；Further according to sewing density, suture
Angle and the correlation for suturing line position, suture unit-nodal information matrix is established using two-dimensional cell, and will suture
Line unit information and nodal information match with battenboard unit information and nodal information.Unit-nodal information square in the present invention
Battle array, refers to the corresponding relation matrix between finite element unit and Component units node；Node-coordinate information matrix, refers to finite element section
Corresponding relation matrix between point and its coordinate；" matching adjacent interlayer unit, nodal information ", due to individually being built to every Rotating fields
Mould, resulting FEM model be each it is independent, in order to by each several part Model Mounting to together, it is necessary to different Rotating fields
Unit and node are matched, and eliminate duplicate node.
(4) above-mentioned steps, are weaved into parametric modeling shell script to complete to build the finite element mould of suture type battenboard
Type；It is specific that suture type battenboard FEM model is built using MSC.PCL language；By unit-node of suture type battenboard
Information matrix writes Nastran calculation documents.Wherein, battenboard and primary load bearing Slab element card select hexahedral element CHEXA,
Suture unit card uses bar unit CROD.Material properties information matrix is write into Nastran calculation documents, wherein suture
It is isotropic material with primary load bearing plate, card can be named as to MAT1, top panel, lower panel and laminboard layer is anisotropy material
Material, can be named as MAT9 by card；By node-coordinate information matrix write-in Nastran calculation documents, card can be named as
GRID；Terminate Nastran calculation documents to write, generate the FEM model of suture type battenboard, as shown in Figure 4.
The modeling method of the present invention to suture type battenboard in finite element modeling is carried out, using parametric modeling method,
Finite element analysis of the suture type battenboard under the parametric variables such as different sizes, suture line density can fast, easily be obtained
Model, and being realized by MATLAB and MSC.PCL language interactive programming, so effectively shorten modeling period, lift unit quality,
Analysis efficiency and analysis precision are improved, efficient, the high accuracy analysis of suture type Composite Sandwich Plates can be realized.
Embodiments of the present invention are described in detail above in association with accompanying drawing, but the present invention is not limited to described reality
Apply mode.For one of ordinary skill in the art, in the range of the principle of the present invention and technological thought, to these implementations
Mode carries out a variety of changes, modification, replacement and deformation and still fallen within protection scope of the present invention.
Claims (5)
1. a kind of suture type battenboard parametric Finite Element Modeling Method, it is characterised in that comprise the following steps：
(1) geometrical characteristic parameter of suture type battenboard, is obtained；
(2) the finite element modeling characteristic parameter of suture type battenboard, is obtained；
(3) suture type battenboard Data of Finite Element Model storehouse, is established using geometric match relation；
(4) above-mentioned steps, are weaved into parametric modeling shell script to complete to build the FEM model of suture type battenboard.
2. the parameter identification method of sandwich composite structure according to claim 1, it is characterised in that：The step
(1) suture type battenboard includes upper and lower panel and the laminboard layer positioned at centre in, passes through between the laminboard layer and upper and lower panel
Glue-line bonds, and is stitched into one with suture；The geometrical characteristic parameter includes long L, wide W, the sandwich of suture type battenboard
The thickness h of each layer of platei, suture section radius R, suture line density M and suture angle, θ；The suture line density M is：
M=Mhj×Mzj
Wherein, MhjFor suture line-spacing, MzjFor suture needle gage.
3. the parameter identification method of sandwich composite structure according to claim 1, it is characterised in that：The step
(2) finite element modeling characteristic parameter includes in：The reticulate layer of suture type battenboard size of mesh opening m and battenboard per Rotating fields
ni,
Wherein suture type battenboard size of mesh opening m is：
M=max (x | x=Mhj/N,N∈N*∩ x | x=Mzj/N,N∈N*∩ x | x=mθ/N,N∈N*}∩{x|x≤
mmax})
In formula, max () is the maximum for seeking set interior element；X is the unit size for meeting single simulation analysis requirement, and N is to appoint
Meaning positive integer, N* is positive integer collection；mθTo meet the unit size of suture angle, θ, its formula is：mθ=H/tan θ, wherein H are
Battenboard gross thickness, θ are suture angle；mmaxTo meet the finite element unit full-size of calculating demand, its formula is：
<mrow>
<msub>
<mi>m</mi>
<mrow>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
</msub>
<mo>=</mo>
<mi>m</mi>
<mi>i</mi>
<mi>n</mi>
<mrow>
<mo>(</mo>
<mo>{</mo>
<mi>x</mi>
<mo>|</mo>
<mi>x</mi>
<mo>=</mo>
<mfrac>
<mi>&pi;</mi>
<mn>4</mn>
</mfrac>
<msup>
<mrow>
<mo>(</mo>
<mfrac>
<mrow>
<msup>
<msub>
<mi>Eh</mi>
<mi>i</mi>
</msub>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<mn>12</mn>
<msubsup>
<mi>&rho;&omega;</mi>
<mrow>
<mi>m</mi>
<mi>a</mi>
<mi>x</mi>
</mrow>
<mn>2</mn>
</msubsup>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<msup>
<mi>&upsi;</mi>
<mn>2</mn>
</msup>
<mo>)</mo>
</mrow>
</mrow>
</mfrac>
<mo>)</mo>
</mrow>
<mrow>
<mn>1</mn>
<mo>/</mo>
<mn>4</mn>
</mrow>
</msup>
<mo>,</mo>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
<mo>,</mo>
<mn>2</mn>
<mo>,</mo>
<mo>...</mo>
<mi>j</mi>
<mo>}</mo>
<mo>)</mo>
</mrow>
</mrow>
In formula, min () is modulus of elasticity, h to ask the minimum value of set interior element, EiIt is for each thickness degree of suture type battenboard, j
The suture type battenboard number of plies, ρ are density of material, ωmaxFrequency is analyzed for highest, ν is Poisson's ratio；
Reticulate layer n of the battenboard per Rotating fieldsiFor：
<mrow>
<mfrac>
<mi>m</mi>
<mn>10</mn>
</mfrac>
<mo>&le;</mo>
<mfrac>
<msub>
<mi>h</mi>
<mi>i</mi>
</msub>
<msub>
<mi>n</mi>
<mi>i</mi>
</msub>
</mfrac>
<mo>&le;</mo>
<mn>10</mn>
<mi>m</mi>
</mrow>
In formula, hiFor each plate thickness, m is unit size.
4. the parameter identification method of sandwich composite structure according to claim 1, it is characterised in that：The step
(3) in, battenboard FEM model is established using hexahedral element first, every Rotating fields are established with FEM model unit-section
Point information matrix, node-coordinate information matrix and material properties information matrix, and match adjacent interlayer unit information and node letter
Breath；Suture FEM model is established using two-dimensional cell again, establishes suture unit-nodal information matrix, and by suture
Unit information and nodal information match with battenboard unit information and nodal information.
5. the parameter identification method of sandwich composite structure according to claim 1, it is characterised in that：The step
(4) in, suture type battenboard FEM model, selecting unit card, material cards and node card are built using MSC.PCL language
Sheet type, it is sequentially output unit-nodal information matrix, material properties matrix and node-coordinates matrix and calculates text to Nastran
Part；Terminate Nastran calculation documents to write, generate suture type battenboard FEM model.
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