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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, K" P$ j1 r8 Z
Displacement in the radial direction:
; o# Q, d: @, K$ o& @9 S/ mSelect “Axis1” and then define displacement plot in X-direction (radial to the axis). Select deformation scale=1
O6 _4 d6 W- L! s, |# ERight-click on the displacement plot icon “plot2” and then select”List selected”
3 z' v& U" G* Q7 eAverage displacement of “pole piece lower” = -0.0019504” (decrease in radius)
# J2 I4 |. y8 ]% l- MAverage displacement of “pole piece upper” = 0.007896 “ (increase in radius)
/ P1 x+ b/ i; O# X3 w0 A @: i, mSum of these 2 displacement = 0.009846” ~Initial interfernce of 0.01”
# |5 b! }( @7 E+ @0 x" }Hoop Stress (tangential):
" R1 S( s2 W9 qSelect “Axis1” and then define stress plot in Y-direction (radial to the axis). Select deformation scale=1
" K2 W+ q& N: t- vRight-click on the stress plot icon “plot2” and then select”List selected”
4 f* Y# G j& N( {Negative stress on “pole piece lower” (compression)" l) M+ B) O0 n( P: y! h0 |" v
Positive stress on “pole piece upper” (tension)
6 p& z+ g9 ]. g' h. z6 ]7 S线性静力分析：定义材料属性
% d9 L* B* \. b& ]- P9 dSimulate parts which are separated by large gaps- a' ^/ z5 F6 u8 b$ _9 `
First run the model with small displacement option and look at the results
; ]; ]) S/ _( R" S 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 option: U( _8 J2 Z( `* O
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线性静力分析：网格划分
: V' `, B# z* G0 C0 POpen “RectangleGap.sldasm”
" P( X4 r2 [2 C5 U# D; i6 r$ [3 ]; `- TDefine a static study “smallcontact”% ?* d8 |* o0 W
Apply material “Alloy steel” to both parts
$ p5 Y! [3 ^0 D y6 E: iApply a pressure of 725 psi on the top face
' `0 N, s2 I0 w4 YSelect the two front faces and then apply restraint. Select Flat face option and then select “Normal to face”4 F6 _' k7 m3 |9 U- A( y
Fix the left semi-circular face; p9 W& F+ e+ I' I/ L0 k
Hide the loads/bc symbols
6 l- V. y- N% x, _9 h9 UDefine “Surface” contact between the top face of the bottom leg and the perpendicular face& Y% a; r6 X D
Create mesh and run8 v# s' n9 y3 D+ {) ]+ q
Define a stress plot with scale factor = 1. Look at the contact surface. 0 d$ q; b- A `8 C: ?
线性静力分析：定义约束
) k3 c! ]& _$ I1 hDefine a new static study “LargeDisp”
, F; `2 }) e1 \& O3 }' w. e* rDrag’n drop the material and loads/bc folders from “small contact” study
& w: J3 n- u o" ^& Y) W. sRight-click on the study name and click on properties. Select “Large displacement contact” option.: g/ U* a$ j2 ?
Run the analysis
7 a# g( n# Z2 s4 \) Q* B5 Z% ?Define a stress plot with scale factor = 1. Look at the contact area.* i2 b: D5 V6 o* z3 W' b
线性静力分析：定义载荷
' |4 d& n, R: X4 \. CSimulate heat resistance between parts for thermal analysis
- \5 E* W6 m% y1 e/ O/ W Account for heat resistance of thin parts without actually modeling them!7 S# T( U5 M0 m
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线性静力分析：求解
6 e4 A' E/ k1 u; NOpen “Thermal contact resistance_transistor.sldasm”, u- T1 J0 D5 n
Explode the model and set preferred units to “SI” and temperature units to “Kelvin”
E8 Z9 i1 y" g/ V, s2 w: JDefine a thermal study “NoRes”
7 C' i% S/ u; A6 Q9 j4 v& MApply material “AISI 304” for “Voltage regulator” and “Copper” for Heat sink
% K3 ~( @) M. }% V3 B8 lDefine “Surface” contact with No resistance between the contact faces3 P5 A! ]! D) o, U( B3 ^" F* J
Apply convection to all the faces of the model except the contact faces
# U1 y" J4 {+ ~' s; C6 P$ p0 vFilm coefficient = 250 W/(m^2.K)
" j' F4 }0 {8 G* h& i! Z3 oBulk temperature = 298 K
2 i X' K% O$ A7 F# ?5 q: |线性静力分析：观察结果
$ H4 S( ]0 @) A. O% J* m5 L! UApply Heat power = 25 W for “Voltage regulator”
+ }7 e" |' M+ Z' {3 l! LMesh with default settings and run the analysis, h- b- S. y1 g. N- L e
Notice the temperature distribution of the heat sink
# r k: I6 \6 M. {Distributed Resistance:
* ?2 }+ R: _+ }1 U/ v2 yDefine a new thermal study “DistRes”
- g: s9 ]. Q3 S+ I. `Drag’n drop “Material” folder and Loads/Bc folder from NoRes study to DistRes study
, f/ a0 N. N7 VEdit contact pair definition and define distributed resistance = 0.005 K.m^2/W
: P! P7 o: C8 nTotal resistance = Distributed resistance X Contact area = 0.005 X 0.0003392 = 14.7 K/W% f- K1 H& f1 @! }
Run the study “DistRes”4 B. k4 R5 J0 R4 J% T! o
Notice the temperature distribution of the heat sink5 C9 k; a& f1 t+ R9 s6 L
Thermal Contact Example (Cont’d). F' X! o2 Z: D
Probe the temperature value
8 W8 V0 h9 K0 Z; R9 @) w& JDefine a thermal plot with mesh
% M: g( F0 x" O( _: g/ `Right-click the plot icon and select Probe) [! I, a! V: N1 ^
Pick all the nodes on the edge of both the parts
* {' m% [- {" j+ b- G5 HClick on the Plot icon to view the temperature variation from the top face of the voltage regulator to the bottom of the heat sink$ k: x7 t# {$ \! W" ?
6 Z# i3 }: L0 E( q* `9 KThermal Contact Example (Cont’d)+ t2 @+ l7 Q U b! \
Total Resistance:
5 b; y) Q) ~: V) ]6 SDefine a new thermal study “TotalRes”
; _3 O, A8 @8 x$ J; g' GDrag’n drop “Material” folder and Loads/Bc folder from NoRes study to TotalRes study5 h5 w+ x7 ^! n4 T4 K6 r; m5 r
Edit contact pair definition and define Total resistance = 25 K/W n: A4 `5 k, W' C7 J- W
Run the study “TotalRes”
8 k( w: V$ s' s% E! fNotice the temperature distribution of the heat sink' a4 ~4 [% f. R0 t2 c* O3 Y
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Load Simulation: Remote Loads
1 K, U% Y! c! o8 {. y! l7 [Remote Loads) R1 f5 M' B, \
Direct Transfer4 [( c+ W% S8 Q% F6 l( U9 _
Flexible surface% D/ i! A6 G" o, J% K* g
Applied as equivalent force & moment
0 W$ l4 U5 p( C) ]) r$ H# {Rigid Beam
# P2 d9 h* m- Q$ }Rigid surface! t. H( p9 Q! v' }
Remote Restraint
& o7 P. d$ x2 f: l' Q9 J1 S+ X8 B. FRigid connection9 M! f: m: F) h8 ]5 q1 _! W
Model effect of a rigid virtual part between two faces( h4 e5 G/ t) F, j
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! F$ Z1 O _# w$ i' y, B: _8 cRemote Load Example
+ G+ F! X& l7 e$ \- ]% W5 J, D% j' YOpen “RemoteLoadExample.sldasm”& R5 S. k& l3 z; n2 `3 i
Define a static study “Remote”
6 M1 \" b) F8 @$ v! ~6 o% G& i r* gApply material “Alloy steel”6 `6 k/ @# ], d. g5 ^& v8 F
Fix the flat face
/ ?* R1 k/ y' n/ x7 zSelect “Coordinate system1” and the end face of the cantilever. Define remote load of 10N in the X direction. ( }1 y; ~* S7 d4 K4 A! K# m
Create mesh and run.
7 P" N2 R: R8 uDouble-click on “Plot1” under the stress folder
9 [6 P$ U: Z' {6 \. Q; t! }& Q( fAnimate the results
' l" S, @$ j& H* [% KCompare the plot results of “Remote” study with “Axial Tension” study" b5 ]2 U, k7 S9 R* ]: Y3 Q# Y
$ s. @+ o, L: ?$ ~7 m A7 xMotion Load Transfer Using Remote Loads
: c1 @; N2 S; A* c3 x3 FGo to SW Add-in and click “COSMOS/Motion”8 k+ n+ i% S9 Y/ Z0 d% c) N+ Q" q
Open “LoadTransferModel_With_Result.sldasm”
7 C% _# Z/ o4 FPlay the animation and save the load file for frame # 300) d/ F4 m$ l) K# ?) Y8 H% s% w
Delete the motion results
J; J# s6 ]/ \* S5 FGo to CW menu, Import Motion Load and open this load file from “MotionLoadTransfer” directory; M* V! q9 Y5 w# @, \! k
Select all the loads related to crank-1 and then click OK." a/ c2 Q4 a3 m
Open the part “crank”
$ W& K! f4 }- g9 L+ CYou’ll see that there is a new study “Frame-300” with motion loads transferred as remote loads
6 N- h1 V" _' j+ ZApply material “Plain carbon steel”
4 p* R D* k- P0 d9 b9 DGo to study properties and select “FFEPlus” solver and “Inertia relief option”
: ~: v8 r4 d c p4 Q2 vRun the analysis
( F! } ~- l: N4 TPostprocessing: Results in local CS
: Z5 r5 Z. A7 ^Plotting
# g/ e* G+ }; T4 ZListings! c3 J% _' T, W7 y: M! y% j
Reaction forces
; r9 K6 z) {7 f1 N7 o2 g2 bPostprocessing: Exploded views
' I4 f+ K& V8 |3 q! pPlot results on SolidWorks exploded views
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. G$ h; V" n. d# ^7 H1 o) v( dPostprocessing: New tools& t( q7 A& r' g: K8 P' A
Improved probing with graphing option
" X: I7 ~1 R# E6 ^ s, NList results by Entity
( g4 f. D' ?' pWeb Reports6 V( j5 `# {) D. X _/ V( ~
Inclusion of report templates in the feature tree
8 Y- @' I# J$ x1 t2 K, F/ YSaving of report setting
6 U: q) L+ W V' n5 _Automatic creation of all plots$ k. z! z2 K: J3 S% a) P# N0 q3 e
Report Example
$ ~' l2 f/ o' w4 A% mOpen “ReportExample.sldasm”8 f& ~! V# ]3 a3 ]
New option save JPEG files (Right-click on the Study name)
. Y$ F2 B, s. d" s& LRight-click on Report and click define) d5 S0 ~1 J% S8 ?, D D) C
Point to the logo file “ReportLogo.bmp”
, y9 w# k7 ^( R7 jPoint to the right stress AVI and VRML files) ~9 f3 q- E# c' n7 q
Select option “Automatically update all plots in JPEG files”. Click OK.
Y7 E5 T, @7 c$ w+ J9 CYou can also get a print version( F5 {% O3 W$ Y5 K( `9 z9 T" |
Material
3 R, w, P$ Y7 W1 c9 g6 d6 |Supports orthotropic material properties for solids and shells ! c9 m: b5 B7 X1 R
Option to use different Material library files
! N8 Y8 {9 \# B' _: sNew redesigned material browser utility
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Licensing' A# E' }$ B: T( C6 M0 K- a; v
Single license file for hardware lock & FlexLM security
: m: S3 a, e5 s; W1 K$ ]$ ~New License Administrator to manage the license
& G" n; W2 S3 H. Z6 c/ TSupport USB port hardware lock( a. V$ q3 `% s5 p& J, V
Support redundant servers
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1 r: Q. M$ n+ k6 ^Other customer enhancements
1 F0 K$ N. P" z/ O5 X! f- s% VAutomatically run analysis after meshing
# P( \! J5 M* v5 e. _- Z: x$ g: sEdge pressure for shells
) x) `: Z9 R0 b s) SApply uniform temperature to components1 S) j; p1 i7 {, U
Automatic adjustments of Max & min in plots on update
1 a) t" p/ B/ _) e4 X0 y+ P; l* w* pFFEPlus solver for thermal analysis
x) P5 b+ R1 u" T" jIncrease the limit on number of modes for frequency analysis from 20 to 100
' M1 F+ K p1 t. P* ?. \Add symbol for gravity loads
$ O6 |4 k! D& e6 P* vImprove section clipping
+ l+ M1 T4 u# e& ]0 xSave plots in JPEG format
) o" T, S( Z% y: `/ _* A L S. CImprove transient thermal animations
6 _/ Q7 ]! q0 p7 u" }Option to switch between different languages5 a4 L! M) p7 N* H( Q% @" ]
Others…
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1 g' q& @$ ^2 p j" B3 p; gThank You! |
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发表于 2008-3-27 16:54:45