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发表于 2008-3-28 09:07:19
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来自： 中国天津
线性静力分析：定义专题
, t; ^5 q9 h' N" HDisplacement in the radial direction:
* X$ f5 g/ x3 E; e. DSelect “Axis1” and then define displacement plot in X-direction (radial to the axis). Select deformation scale=1& D- v( c( u' Z/ W- D4 q5 _
Right-click on the displacement plot icon “plot2” and then select”List selected”
8 `$ C% C/ Q3 X/ ^( u! PAverage displacement of “pole piece lower” = -0.0019504” (decrease in radius)* m' }: q/ o8 f" X6 }' O1 V
Average displacement of “pole piece upper” = 0.007896 “ (increase in radius)
+ O/ u1 X; F! z/ M$ v, R" ~Sum of these 2 displacement = 0.009846” ~Initial interfernce of 0.01”
! O( n& c2 Q/ yHoop Stress (tangential):# N a2 d( F1 _2 d0 j2 _* [& O: ?' A
Select “Axis1” and then define stress plot in Y-direction (radial to the axis). Select deformation scale=1
$ c( W; Q* i0 p1 z$ F8 SRight-click on the stress plot icon “plot2” and then select”List selected” U- R& N+ t' j5 `+ D% x# ~* \
Negative stress on “pole piece lower” (compression)
0 D) { Y: ^+ p9 z% uPositive stress on “pole piece upper” (tension)7 u* N: w7 }" Z4 X8 {+ {3 r& i+ }
线性静力分析：定义材料属性
+ \$ d% U8 m" l5 M0 `9 p! A2 RSimulate parts which are separated by large gaps
: @) \( {4 B% N8 v+ UFirst run the model with small displacement option and look at the results7 w4 G$ K) j$ M5 E) q
If you see that there is a change in the orientation of the contact surfaces during loading or if the results doesn’t look realistic, use large deflection option5 `- E D& b% c$ O/ u# \1 ^
- x$ x1 d- @- S; g, O! m线性静力分析：网格划分% x6 ^$ f( t3 U! T4 M
Open “RectangleGap.sldasm”
. s: Y6 }6 l0 r! t: j. p' B; ODefine a static study “smallcontact”9 o$ J& r8 D `8 W, O* ~# U
Apply material “Alloy steel” to both parts
& \5 _- r" H: ^+ JApply a pressure of 725 psi on the top face
0 m& A6 A% U% n9 r6 l2 O8 ~9 c7 MSelect the two front faces and then apply restraint. Select Flat face option and then select “Normal to face”
) g/ {1 |+ `9 y1 Z& [5 wFix the left semi-circular face
4 S, ?9 Q' b7 k" ~) E3 y4 |9 pHide the loads/bc symbols
8 H0 F) d5 M2 L, L- ^Define “Surface” contact between the top face of the bottom leg and the perpendicular face
/ c- Y+ z* ], N$ T- g% w1 TCreate mesh and run
& L' \/ t4 u- J7 {7 Z- x0 HDefine a stress plot with scale factor = 1. Look at the contact surface.
3 w) l/ D/ k! y, |线性静力分析：定义约束, x+ ]" B9 |) _" o
Define a new static study “LargeDisp”
' A" i+ ^( u% @! `( KDrag’n drop the material and loads/bc folders from “small contact” study
$ I( z7 k# ?( G* ?5 P; a% F. V- ARight-click on the study name and click on properties. Select “Large displacement contact” option.
' @+ u& T/ j: ?. Z0 Y; lRun the analysis$ D+ C) s- c# U- y- w
Define a stress plot with scale factor = 1. Look at the contact area.
4 M' U# `' q: c( ?* y8 [线性静力分析：定义载荷
3 P! G3 }. i x% H# r$ USimulate heat resistance between parts for thermal analysis
0 K* R) P) X( b Account for heat resistance of thin parts without actually modeling them!* {7 ]0 k1 |4 j" E& E
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线性静力分析：求解
1 ]) d6 l+ n% ]% eOpen “Thermal contact resistance_transistor.sldasm”& x. D1 e; t) c, S2 b5 a
Explode the model and set preferred units to “SI” and temperature units to “Kelvin”
5 j0 k/ T1 }/ _/ |6 M' _Define a thermal study “NoRes”% t. [6 Z& I, h$ m4 s% D
Apply material “AISI 304” for “Voltage regulator” and “Copper” for Heat sink
' ?& x6 F4 Z& A6 {) W7 uDefine “Surface” contact with No resistance between the contact faces
. Y" g1 t1 B6 G- [- w! v7 o# @Apply convection to all the faces of the model except the contact faces
3 R3 K! N/ A2 ?. H9 XFilm coefficient = 250 W/(m^2.K)% H/ A% ?5 s C6 V3 x$ b
Bulk temperature = 298 K
; X! {+ S$ N3 B# E线性静力分析：观察结果
/ T7 r" V% j: ?+ l5 q, v( r+ @Apply Heat power = 25 W for “Voltage regulator”
: _9 K/ H H" m* N ]8 fMesh with default settings and run the analysis5 T. ]# M% r& R4 ?! v/ f1 L6 j
Notice the temperature distribution of the heat sink
/ [4 z" H3 Z B9 \3 _ C( H+ KDistributed Resistance:+ e% J v% x& q0 \1 e" a
Define a new thermal study “DistRes”
0 E0 q5 P0 V; z R/ x. ?- vDrag’n drop “Material” folder and Loads/Bc folder from NoRes study to DistRes study
+ t" ]. @, ]. n/ i5 yEdit contact pair definition and define distributed resistance = 0.005 K.m^2/W D: X! _) s: E" b) a1 L; g
Total resistance = Distributed resistance X Contact area = 0.005 X 0.0003392 = 14.7 K/W
; o) s* D( k4 `3 @! w, A1 dRun the study “DistRes”
% o+ e/ W. ~& C$ v8 INotice the temperature distribution of the heat sink
: }3 E+ y$ R9 r3 _3 \Thermal Contact Example (Cont’d)# n; W5 `( \# w, g
Probe the temperature value
8 p4 e+ s% {- {! d5 h! @Define a thermal plot with mesh8 g5 L# e; G+ \- z) b$ d5 q$ {
Right-click the plot icon and select Probe4 ?& i6 Q" u$ Z2 Q( Y( u
Pick all the nodes on the edge of both the parts
5 }+ x+ q1 d0 o" J3 S7 kClick on the Plot icon to view the temperature variation from the top face of the voltage regulator to the bottom of the heat sink! J: j( N, G6 T0 r, D) Z" ?; K
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Thermal Contact Example (Cont’d)7 T) P1 P: D. R) O% X
Total Resistance:' a8 f/ v& G( J: W9 Y4 K
Define a new thermal study “TotalRes”- \' d* m# o, A% P+ m6 ~
Drag’n drop “Material” folder and Loads/Bc folder from NoRes study to TotalRes study
0 n- E9 ^. X2 m" w" s! rEdit contact pair definition and define Total resistance = 25 K/W ' d" O5 R* ^" X$ d) h
Run the study “TotalRes”
% X( ~/ w) N; R; T3 a: c; KNotice the temperature distribution of the heat sink
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Load Simulation: Remote Loads) U6 `7 B* g8 W f
Remote Loads
# R1 r5 i9 m$ C" h* }! M# UDirect Transfer
) H0 W, q) _$ m) o/ \; F0 kFlexible surface
% l! I: B. ~( M' ^9 pApplied as equivalent force & moment
4 j: ] V" ~2 \) ~2 k+ VRigid Beam8 O/ X! K- ^( t! ?
Rigid surface, o+ t3 W5 u$ \, T9 y
Remote Restraint9 P: j& f1 E- ^; N5 h3 ^. _
Rigid connection2 m T% T: e! \# Z% X* Q# R
Model effect of a rigid virtual part between two faces# v' R" o7 f( o0 y; k
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- y; h- [+ a% ~/ y1 Q3 X; ?& }8 nRemote Load Example
* Q& j4 ^" \# e) M5 t( l) Y hOpen “RemoteLoadExample.sldasm”
( X2 Z# n p; E# T! W& s6 ?Define a static study “Remote”- u- M# \. ?( I
Apply material “Alloy steel”
. d1 B0 G% Z# w! cFix the flat face
% L; M2 k+ e7 CSelect “Coordinate system1” and the end face of the cantilever. Define remote load of 10N in the X direction.
_1 o9 ~2 {0 |3 x) DCreate mesh and run.
" d7 w" W% ^& L4 j2 u2 ~2 |, ?Double-click on “Plot1” under the stress folder4 @& ~7 y1 J' m) C$ P
Animate the results
# ?6 U* B9 l4 ]/ V: h1 gCompare the plot results of “Remote” study with “Axial Tension” study
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Motion Load Transfer Using Remote Loads
5 a6 ]( q9 O* X: }$ EGo to SW Add-in and click “COSMOS/Motion”
8 s8 D5 W% ~4 `( [, ZOpen “LoadTransferModel_With_Result.sldasm”6 H0 c4 N$ I% x7 O! k: k) w/ d+ A
Play the animation and save the load file for frame # 300/ l2 m/ |2 g3 q! |
Delete the motion results
* U0 G9 Y& y9 I% r9 aGo to CW menu, Import Motion Load and open this load file from “MotionLoadTransfer” directory
' Y% u" j! E8 l4 {: OSelect all the loads related to crank-1 and then click OK.
% E' O. e- t2 B! }. ^Open the part “crank”( S4 r# z( j9 t' L* X# \+ K
You’ll see that there is a new study “Frame-300” with motion loads transferred as remote loads
" I; U' z3 Y6 f: {- L3 EApply material “Plain carbon steel”
& ]/ w. h2 [5 v6 ?# r0 ~2 iGo to study properties and select “FFEPlus” solver and “Inertia relief option”
y, I: U& G3 E6 CRun the analysis
( k! C* Z t! h; Z7 G5 iPostprocessing: Results in local CS& L! [; u0 d5 E3 D6 T7 X
Plotting
( k" a! E; r. R) p: k% d& V7 g2 {Listings M- x1 A( d [
Reaction forces1 {2 W/ K" z$ `# T
Postprocessing: Exploded views
! l' N# q" u$ N9 B9 Z6 k8 \Plot results on SolidWorks exploded views! Y$ g* L/ H; Z+ e& y4 q
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Postprocessing: New tools+ m! ~, q8 @0 F3 d' L- E. W" G
Improved probing with graphing option
% r1 v5 ]9 |; b4 @List results by Entity
/ K. X( I- o% o+ j+ }# B- h& wWeb Reports& y/ U2 x& @& t. [6 l$ I
Inclusion of report templates in the feature tree1 [. h- _4 G8 a) [$ ?; R1 ]9 [" c
Saving of report setting* ^, k# ^3 j9 O! O
Automatic creation of all plots
3 P* T8 M6 n7 Q+ c. j! N7 aReport Example; _9 [! t$ o# ]1 y- N+ D
Open “ReportExample.sldasm”
3 i- x6 r/ G8 e' `2 a. l. p4 RNew option save JPEG files (Right-click on the Study name)* G" `2 k# K% W& A4 f* R" p
Right-click on Report and click define
$ X6 e0 n( C" `+ S+ Q7 }4 b0 SPoint to the logo file “ReportLogo.bmp”
# j1 ~5 B' p# @Point to the right stress AVI and VRML files
/ j% d, x' x; g' w3 bSelect option “Automatically update all plots in JPEG files”. Click OK.) ~7 t3 @$ }9 {, z/ v
You can also get a print version6 _3 P7 H( N6 [+ e6 a
Material
; O: n) I$ J/ YSupports orthotropic material properties for solids and shells 9 m0 _+ N0 E! r$ Z" I. ]/ A
Option to use different Material library files
; R8 P/ N6 W0 R, ]7 r3 CNew redesigned material browser utility
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' a( c' P' P2 l+ \& D+ ^Licensing
- N* J1 O1 B. z6 \: rSingle license file for hardware lock & FlexLM security
2 _3 c# L1 r9 y) G% N: nNew License Administrator to manage the license4 G7 b3 ]2 v) y/ M1 f0 Q, f- e
Support USB port hardware lock
' b. A( N) A7 c( T$ hSupport redundant servers6 `* U+ m! m" b. W+ m3 b4 d
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Other customer enhancements) @. @4 p; c/ P6 [
Automatically run analysis after meshing8 ]) j* X3 n; @1 G
Edge pressure for shells
: c/ b: N, G4 ]0 HApply uniform temperature to components" b; T* q6 R0 W. p$ G) x
Automatic adjustments of Max & min in plots on update
) k# }" Z6 k% G4 pFFEPlus solver for thermal analysis
; Z3 U( @6 a! P! X" q a9 vIncrease the limit on number of modes for frequency analysis from 20 to 100
1 ~3 f& E, _6 R. V. HAdd symbol for gravity loads8 A! b6 ]% x3 M) h- @
Improve section clipping
) ~- d; S$ V e5 PSave plots in JPEG format
. `/ G S; J5 G% f- h/ dImprove transient thermal animations: o3 T2 U7 x' ^4 N+ t" `
Option to switch between different languages% H) s# U* g( ~! n. @
Others…) X- R1 e4 C2 O0 U6 b0 g& G; n/ K
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发表于 2008-3-27 16:54:45