111430853-cau-lệnh-cơ-bản-trong-ansys

5/20/2018 111430853-Cau-l nh-c -b n-trong-ANSYS

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C}u lnh c bn trong ANSYS Ansys

L{m sao dng c c}u lnh trong ANSYS? ANSYS l{ mt phn mm mnh v tnh to|n kt cuv{ hi tr m hnh kt cu cu vi nhiui tng. Nhng ANSYS c mt c im l{ gip ngi

dng trn trn giao din ha kh nng trung bnh. Vy m hnh mt b{i to|n c n h{ngnghn node nm chng cho ln nhau th chc nng pick im ca ANSYS t ra km hiu qu. Giiquyt vn bn nn hc c|ch s dng dng c}u lnh trong ANSYS:

1.t tiu cho vic m hnh b{i to|n: /TITLE, tn b{i to|n, ng{y th|ng

2. Chc nng ghi ch: !* ghi ch ni dung

3.Bt u to marco thc hin c|ch lnh ca chng trnh: /PREP7

4.n v o US hay SI: /UNIT, SI hay US

5. To iu kin bin cho b{i to|n: /SOLUTION

6.Kt thc vic m hnh: FINISH

7.To khung nhn cho m hnh: GPLOT hoc EPLOT (xem c|c th{nh phn ~ to ln), NPLOT xem ta node

8. To d liu cho b{i to|n: /POST1

9.Thm th{nh phn (element type) : ET, tn th{nh phn. V d:

ET, LINK1 ET, BEAM4 ET,BEAM23 ET,CONTACT39 .....

10. chnh sa mt s th{nh phn c bn trong element type:

KEYOPT,s th t ca kiu th{nh phn, v tr cn sa, th t cn sa

VD: BEAM23 c KEYPOT,2,2,3 Material Model to V d:
http://www.viet3g.com/ansys/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys.htmlhttp://www.viet3g.com/printmail/267?destination=node/267http://www.viet3g.com/print/267?destination=node/267http://www.viet3g.com/printmail/267?destination=node/267http://www.viet3g.com/print/267?destination=node/267http://www.viet3g.com/printmail/267?destination=node/267http://www.viet3g.com/print/267?destination=node/267http://www.viet3g.com/ansys/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys.html


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MP,EX,1,30e6 ! M un {n hi ca thpMP,GXY,1,11.2E6 ! lc ct {n hi ca thpMP,DENS,7800 ! trnglng ring ca thp kg/m3MP,HF,1,2 ! h s i lu hay h s m{ngMP,KXX,2,0.5 ! tnh dn nhit ca b tng

MP,ALPX,1,11.7e-6 ! h s n nhit ca thpMP,RSVX,1,1 ! sut in tr

13. To node v{ ta im trn m{n hnh (thay cho vic v{o Model -> Create -> Node -> Active CS)

N,th t node, ta x, ta y, ta z

VD: N,,1,1,1 ! Node n{y c to ra vi ta x,y,z l{ 1,1,1, v{ s th t t ng tng dn

Hoc nu bn to 10 node m{ c c|c khong c|ch node l{ nh nhau th:

N,1,0,0,0 ! to node 1 trc

N,10,10,0,0 ! to ra node cui dng

FILL,1,10 ! t ng in tip 8 node cn li cho bn

14. copy t v tr n{y sang v tr kh|c: NGEN, COPIES, INC, NODE1, NODE2, NODINCR, DX, DY, DZ

COPIES= s lng node s copy bao gm node bt uINC= node s bt u tng dnNODE1= node u tin ca d~y cho ban uNODE2= node cui cng ca d~y cho ban uNODINCR= s gia gia c|c node trong mt h{ngDX, DY, DZ= bc nhy theo phng X, Y Z

V d: c mt d~y node l{ : 1, 2, 3, 4, 5, 6,8 nm trc X. Gi cn phi copy node n{y chy dc theotrc OZ vi s lng 10. Mi h{ng node c|ch nhau 1m: NGEN,10,1,1,8,0,0,0,1

15.t kiu vt liu trc khi thc hin lnh ni c|c ELEMENT vi nhau:

TYPE, s th t ca element type

MAT, s th t ca vt liu

REAL, s th t ca tnh cht ca element type

VD: TYPE,1

MAT,1

REAL,1

16. To ra element trn m{n hnh, vic n{y bn phi pick c|c im kh| vt v nhng tn dng lnhn{y th rt gn thi gian c cho bn: E,node 1, node 2, node 3,..... node n

VD:


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TYPE,1 ! kiu kt cu (element type) 1MAT,1 ! kiu vt liu 1REAL,1 ! d liu 1E,1,2 ! Element 1, nodes 1-2

E,2,3 ! Element 2, nodes 2-3

17.Copy element, nhiu khi bn ca phi l{m i l{m li mt cng vic trong mt h{ng node vic n{ys rt ngn thi gian nu nm chc vic n{y: EGEN, COPIES, NODINCR, ELEM1, ELEM2, ELINCRhoc EGEN, COPIES, NODINCR, -NUM

Kh| ging vi NGEN:

COPIES tng s element cn copy bao gm ca element gcNODINCR Node s bt u tng ch gia ln gia c|c nodeELEM1 element u tin trong d~y cn copyELEM2 element cui cng trong d~y cn copyELINCR S gia gia c|c elemetn vi nhau-NUM s ln gn nht c ~ c nh trong d~y element

V d: bn c element: 1-2 (1,2 l{ node) cn copy n th{nh 4 element kh|c nhau:EGEN,4,1,-1

Lnh n{y s t ng copy cho bn:element: 2-3, 3-4, 4-5 vi 2,3,4,5 l{ node.

18.Chuyn v: t chuyn v cho mt node n{o m{ ~ bit tn node:D,NODE,UX,UY,UZ,RX,RY,RZ,ALL,VOLT,TEMP

V d: D,1,UY,0 ! t gi ta cho node 1 l{ gi trt

D,3,UX,0,,,,UY !t gi ta cho node 3 l{ chtD,4,ALL !Ti node 4 s t l{ g{m

D,2,TEMP,300 ! ti node s c nhit t|c ng v{o 300C

19.t lc cho mt node n{o : F,node, hng, gi| tr: F,1,FX,3000 !node 1 s c gi| tr lc l{ 3000

20.Lc ph}n b:SFBEAM,element,keyload,PRES, gi| tr u, gi| tr cui

VD: SFBEAM,1,1,PRES,60 ! c element s chu t|c dng lc ph}n b l{ 60

SFBEAM,1,1,PRES,60,70 !element n{y s chu lc t|c dng hnh thang

Ch : Keyload vi lc rt quan trng khi t lc, keyload i din cho mt phng m{ ti trng sc t ln. Mi mt th{nh phn kt cu c mt keyload ring bit. V d SHELL63 th keyload = 2

l{ mt trn theo chiu ca th{nh phn SHELL63.

hay BEAM3 th keyload = 1 tc l{ lc s t|c dng ln phng FY. Chiu ca keyload ph thuc v{onode i trc hay sau, mun bit c v tnh cht n{y ca tng vy liu bn nn tm hiu thmtrong HELP ca ANSYS. V d nh SHELL63 c 4 nodes. N s bt u t I-J-K-L, v{ v tr ca tngim I, J, K, L v{ chiu ca n. Khi keyload mi c nhp v{o.

Nh hnh di d}y l{ ta I-J-K-L ca SHELL63, bn nn ch n OX, OY, OZ t ng Keyload.Keyload -2 mt trn, 5 mt bn YOZ,...


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V dbi vbiu m men cho m:thc tp c ANSYS v hiu c cch ly moment, lc ct v ni lc trong ANSYS.Bn cn phi thc tp nhng bi ton c bn sau.Cho dm ngin, sdng ANSYS m hnh bi ton v a ra biu moment v lcct. Chiu di dm l 10in (Ti dng lun n vin v bi ton ny ti lm bng n vin)

y l v dc bn, cc bn shiu c lm cch no nhp dliu v sl dliu camt bi ton khi c m hnh vo ansys.

Sau khi khi ng ANSYS 10ED bn snhn thy mt mn hnh nh di y:

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Phn mm ANSYS c 2 menu c bn. Menu trn cng l menu thao tc cc chc nngnh a ra kt qu, khung nhn, gc nhn, hay hin tn tng node (keypoints)... Menu th2bn tay tri, chc nng chnh l dng nhp sliu, xl tnh ton, m hnh bi ton,

Lm cch no gii bi ton trn? gii c bi ton trn bn cn lm theo nhngbc sau (trong tng bc ti scgng m tklng nhng iu bn cn hay nhng tipgip bn c thlm vic nhanh hn nhng ln sau)

1. Thay i tn cng vic:

Menu trn cng bn vo FILE -> CHANGE JOBNAME, bn thay i tn JOBNAME. iuny rt quan trng v stn file ca bn khi bn lu n li.
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5/29

Bi ton ny ti thay i tn bi ton l "Knuckle Joint pin", sau bn bm OKnh hnhdi.

2. Thay i li ng dn:

Cng vic ny gip bn tm kim file nhanh hn khi ghi li file. Thc t, nu bn khng thayi li ng dn th chng trnh stng ghi vo mt th mc mc nh ca n, bn srt mt cng tm kim. V vy tt nht bn nn thay i n trc khi thc hin cng vicca mnh.
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6/29

Sau khi chn xong ng dn bn bm OK kt thc cng vic ny.

Tip: Bn c thxem qua biLM QUEN VI ANSYSr hn vchc nng ny v thchin cng vic nhanh hn.

3. M hnh bi ton v chn cch xl cho my tnh:

Bn tay tri bn nh ni trn l menu nhp sliu v m hnh bi ton. Mi biton bn cn phi sdng Menu ny.
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Chn Preferenceschc nng ny kh l quan trng trong tng bi ton ca bn, phngphp gii hay l kt quca bi ton. Nh bi ton ny th c gii theo kt cu thunty (Structural), cn mt sbi khc bn cn xem bi ton yu cu g v dnh l: xllung kh, nhit (Thermal) hay dng chy (Fluid) bn schn nhng chc nng . iu

ny c li hay hi? iu ny gip cho bn tit kim c rt nhiu ti nguyn cng nh thungn li thanh Menu, brc ri khi bn tt cm hnh bi ton trn.

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4. Chn tit din dm v nhp sliu:

Chn Preprocessor ->Element Type:

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Mt ng dng l ELMENT TYPEShin ln, chn kiu phn tbn bm vo ADD. Libraryof Element Types shin ln cho bn la chn kiu phn t. Bn sthy Structural Mass cLINK, BEAM, PIPE, SOLID, SHELL, CONSTRAINT... vy nhng phn tny c chc nng g?

Phn tLINK chdng cho tnh ton dn, phn tny c hiu mc nh l khng cMoment.

Phn tBEAM phn tny dng tnh ton dm, phn tny 3 gi trMoment, lc ctv ni lc

Pipe phn tthnh dng ng

Solid v Shell phn tdng tm, thng tnh ton v m hnh bi ton vi sn hoctng.

Constraint: Phn tny kh l hay, khi bn tnh ton mng hay mt nn n hi th phn tkh hu dng cho php bn t tnh hung nn n hi c mt cng K no . Khi bi ton sst thc thn.
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Trong bi ton ny bn BEAM, BEAM c 2D elastic3 v Plastic 23, thng th cc bi tonkt cu c tnh ton cho ELASTIC, cn PLASTIC khi tnh ton bin dng ca kt cu cngh khi kt cu c thuyt sbgy. TAPEREC 54, phn tny tnh cho tit din khngu ca kt cu. V du A c cao h1 nhng u B c cao h2. Cn 3D finite straindng m hnh dm trong tnh ton kt cu 3 chiu.

Vy sau khi chn 2D ELASTIC 3, ELEMENT TYPE shin ln nh hnh v. di cui chntip OPTIO, mc ch chn tnh ton kt quca dm ny. Thng thng bqua, Bcny cng c v ANSYS vn a ra kt l Moment v ni lc.

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5. Khai bo gi trca BEAM.

y l bc kh quan trng, nu bn khng khai bo th tnh ton c ththt bi, d khngtnh n bn cng nn khai bo l 1 cho tt ccc phn t. Chn Preprocessor > RealConstants > Add/Edit/Delete
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c sn BEAM 3 (nh lc ny n c cho tth vin phn t). Bn chn BEAMv bm OK.

Real Constant window cho Beam 3 hin ln nh sau:
http://media.viet3g.com/viet3g/uploadedfiles/b352877f27e1534b6ad4cfa599ab02ca.jpg


10/29

Bn cn phi nhp din tch (AREA), Moment qun tnh IZZ v chiu cao ca dm(HEIGHT). Shear deflect constrant (SHEARZ) v INITIAL STRAIN v ADDMAS th bn khngcn quan tm v sao, v bi ny dm khng c mt lc c chuyn vcho trc, vkhng c ko ban u ca dm, hay dm cng khng cho trng lng ring trn mt di c bn. Nn bn c thbqua cng on ny.

6. Khai bo vt liu

Vt liu ca bi ton, y l iu cng kh quan trng, bn phi khai bo nhng vn cbn ca dm l M un n hi (E) v hsPoisson (esp) cho bi ton.

Preprocessor > Material Props > Material Models, mn hnh xut hin Define MaterialModels Behavior window sc m.

Bn chn isotropic (ng hng), linearly (tuyn tnh), elastic (n hi), structural (kt cu)

Material Models Available: Bn chn > Structural > Linear > Elastic > Isotropic.

Linear Isotropic Properties for Material Number 1 sxut hin:

Bn cn phi nhp 30e6 cho EX (Xut Young) v 0.3 cho PRXY (hsPoission). cui cng lbm OK. Nu bn mun ktrng lng bn thn th bn cn chn DENSITY v nhptrng lng bn thn ca vt liu vo

V d: B tng: 2400kg/cm3, Thp: 7850kg/cm3 hay Gch l: 470kg/cm3

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Sau khi bm OK bn c th vin c bn cho vt liu dm ca bn.

7. M hnh bi ton.
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Bi ton c thgii theo Node hoc Keypoints, vy im khc nhau gia Node v Keypointl g? Node chyu gii cho kt cu khi n c m hnh thnh nhiu node. DngKeypoint khi bn cha bit kt cu ca bn snh sdng nh thno, nn bn c thdng Mesh (chia nh) to thnh mt li cho kt cu. y ti dng Keypoints.

Preprocessing > Modeling > Create > Keypoints > In Active CS

X, Y ,Z l ta im m bn cn phi in m tkt cu ca mnh. NPT l stht

im (1,2,3,....)Bn nhp cc vtr sao y.in NPT l 1, X = 0. Y= 0, Z=0 th ti vtr 0,0,0 im keypoint 1. Bn APPLY v nhp lnlt vi cc Keypoint khc.KP # 1: X=0, Y=0, Z=0KP # 2: X=2, Y=0, Z=0KP # 3: X=4, Y=0, Z=0KP # 4: X=6, Y=0, Z=0
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12/29

KP # 5: X=10, Y=0, Z=0Trong bi ton ny do BEAM 3 l 2D ELASTIC nn khng thgii c trong khng gian, dovy Z = 0. Nu bn mun gii trong 3D th bn cn phi chn 3D ELASTIC.tip: Nn nhp tng dng mt sau bm APPLY, nu bn bn OK, bn sphi chn liTrong trng hp bn bli bn c thxa Keypoint bng cch. Preprocessing >

Modeling > Delete > Keypoints

Chn nhng Keypoint bli v bm OK, bn xa c keypoint li ri.

Sau khi kt thc bn bm OK mn hnh scho bn gi trnh sau:

Trong trng hp sthtkeypoint m khng hin ln nh hnh v, tMenu trn cngbn chn

PlotCtrls > Numbering > put a checkmark next to keypoint numbers > OK
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13/29
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14/29

Tip: Vi NODE v ELEMENT bn mun hin shay cc chthmu khc nhau th chn tngt.Hoc hin kt quvtr ta ca cc im keypoint bn chn nh sau:List >Keypoint > Coordinates Only(nh hnh trn)

Bc tip theo chng ta cn phi ni cc im Keypoint li to thnh mt dm thng.Bng cch

Preprocessing > Modeling > Create > Lines > Lines > Straight Lines
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15/29

Ln lt chn im 1 v im 2 sau bm APPLY (cn nh tip trc, khng nnOK khi cha kt thc nhp) ln lt nh vy cho n khi keypoint 4 v keypoint 5c chn th bn bm OK kt thc m hnh bi ton. Nu mt li xy ra trongqu trnh m hnh bn c thxa n i bng cch: Preprocessing > Modeling > Delete> Lines Only, ri chn li Line va vxa n.

Sau khi kt thc bn sc c m hnh nh sau:

No by giiu quan trng y l, nu bn c 5 im nh trn th khnng vbiu Moment skhng c chnh xc v bn c qu t im. Nu biu moment c vln th cha chc n i theo nh mun m n shin ra tonng thng ( Bn c ththli sau khi lm xong v dny. Bn shiu ti sao)

Keypoint gip bn to mt li ddng hn so vi Node. Nh y nu Node thbn cn khong trn 10 nodes m hnh v vbiu moment cho p thKeypoint bn chcn t hn s sau bn dng cng cMesh thc hin n.

Preprocessing > Meshing > Size Cntrls > Manual Size > Lines > All Lines
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16/29
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17/29

Bn cn phi in vo Element edge lengthl 0.1 tc l mt li ca bn c chia nhn 0.1 (10/0.1) khong 100 im. Ch y l ty thuc vo phn ANSYS shi trbnbao nhiu im chia ANSYS 10ED hi trkhong 1000 im chia. Bn bm OKkt thccng vic ny.

By gibn bt u to mt li cho dm ca mnh: Preprocessing > Meshing > Mesh> Linestmn hnh Mesh Linesbn cn phi chn Pick ALL, th chc nng Mesh stng to mt li cho dm ca bn. Sau khi ton thnh bn sthu c nh sau.

Nhn qua chng thy im keypoint no na, v dm ca bn c chia nhthnh ccmt li ri.

8. Sl v a ra kt qu.

Sau khi hon thnh cng vic nhp kt qunh trn bn cn phi gii bi ton ny ckt qu. TMenu bn chn:

Solution > Analysis Type > New Analysis

y c nhiu loi kho st bi ton.

Staticskho st kiu tnh nh, tc l vi cc kt cu thun ty gii a ra kt qunilc v moment.

Kiu Modal, kho st bi ton di dng ng lng tc l khi bnh hng bi ng thay va chm.

Harmonic gii bi ton theo iu ha hay tun hon (thng cho kh v nhit )
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18/29

Kho st kiu Eigen Bucklinga vt thbbcong hoc h hng.

Transient: Va chm tc thi, c thsdng trong tnh ton kt cu c nh hng ti ngt

Spectrum: Kho st bi ton di dng quang ph, hay di tm m.

Trong bi ton ny chng ta schn Staticstnh ton vn c bn ca kt cu.

Thm ngoi lc v t ngi tcho dm. Hin ti dm ca ang bbao phhon tonbng mt li hin r nhng thnh phn bn cn :

Plot > Multiplots v Plot > Keypoints > Keypoints (Hin keypoint)

By gichng ta mi ththm ngoi lc vo c, nh lc ny th rt kh chn LINEno thm ngoi lc.

Solutions > Define Loads > Apply > Structural > Force/Moment > On Keypoints
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19/29
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20/29

Bn cn phi chn tKEYPOINT c thm hnh bi ton nh u bi a.

Vtr ngoi lc tc dng:

KP1 FY 400KP1 MZ 400

KP2 FY -400KP2 MZ -400KP3 FY 200KP4 FY -200KP5 FY 400

By gichng ta cn phi nhp lc phn bcho bi ton.

Solutions > Define Loads > Apply > Structural > Pressure > On Beams. APPLY

PRES on BEAMS shin nn bn cn phi chn BEAM c lc tc dng ln, ychnh l lc phn b). Bn chn LINE gia keypoint 2 v 3, v in gi tr100vo Pressure at Node I, Nu ngoi lc phn bl hnh tam gic th bn cn phi in voNode J, cn khng th bqua. Mc nh ca phn mm Load Key l 1, cn nu bn muntm hiu hn vLoad Key (bn c li biLm quen vi ANSYS
http://www.viet3g.com/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys/l%C3%A0m-quen-v%E1%BB%9Bi-ansys.htmlhttp://www.viet3g.com/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys/l%C3%A0m-quen-v%E1%BB%9Bi-ansys.htmlhttp://www.viet3g.com/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys/l%C3%A0m-quen-v%E1%BB%9Bi-ansys.htmlhttp://www.viet3g.com/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys/l%C3%A0m-quen-v%E1%BB%9Bi-ansys.htmlhttp://www.viet3g.com/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys/l%C3%A0m-quen-v%E1%BB%9Bi-ansys.htmlhttp://media.viet3g.com/viet3g/uploadedfiles/6ceac1031fd5e2cfbeadaeb9ff4f5e36.jpghttp://www.viet3g.com/h%C6%B0%E1%BB%9Bng-d%E1%BA%ABn/ansys/l%C3%A0m-quen-v%E1%BB%9Bi-ansys.html


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http://media.viet3g.com/viet3g/uploadedfiles/2936083bf986776ea9233855f6250af3.jpg


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Tng tvi cc LINE cn li.

KP3 v KP4: -100. KP4 v KP5: 100

Cui cng mn hnh sa ra nh sau: (Nhn c vphc tp phi khng, nhng n l mhnh li ca bi ton)

Nu bn mun xem di dng 3D ca dm bn c thlm nh sau xem hnh nh 3D ngin ca bi ton.

Plot Controls > Style > Size and Shape

Mn hnh Size and Shape sxut hin,Bn cn phi bt chc nng Display ofElementxem hnh nh 3D ca dm ny. Nh hnh di y.
http://media.viet3g.com/viet3g/uploadedfiles/76b1b3897075dd88f27b741d9f7b54e7.jpg


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Chn OK kt thc, sdng thanh cng bn tay phi xem hnh nh khng gian 3 chiuca dm.
http://media.viet3g.com/viet3g/uploadedfiles/2fcd3604eeecc5304ddaf5d94e73135b.jpghttp://media.viet3g.com/viet3g/uploadedfiles/5ff2c6ed44f13fffca947966b2570577.jpghttp://media.viet3g.com/viet3g/uploadedfiles/2fcd3604eeecc5304ddaf5d94e73135b.jpghttp://media.viet3g.com/viet3g/uploadedfiles/5ff2c6ed44f13fffca947966b2570577.jpg


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Bc tip theo gii bi ton ny bn chn Solution > Solve > Current LS. Mn hnhshin ln thng bo vSolve Current Load Step, chn OK. Nu mn hnh hi bn mtli l Verify thng bo rng c li g hay bo ng nhng khng phi li nghim trngbn c thbm OK chy tip. Nu l li nghim trng mn hnh sa ra thng bo livi hnh chX mu , v bn khng thgii c bi ton. Sau khi my tnh chy xong

mt thng bo hon thnh cng vic (SOLUTION IS DONE). y bn chbm DONE hayCLOSE (ty thuc vo phin bn) bt u mt nhim vmi l khai thc kt quca biton.

9. Vbiu Moment v Lc Ct.

Trong trng hp c rt nhiu cch xem chi tit biu lc ct v moment. Cc n ginbn c thxem qua menu LIST gc trn mn hnh, cch ny a cho bn mt bng cccon sv bn phi bit xem im u im cui. Nhng cc di y a ra nh cc phnmn khc l hin thngay trn mn hnh ha ca phn mm. Menu GENERALPOSTPROCrt quan trong khi cn xem kt quca bi ton.

Vic u tin chng ta cn phi nh ngha mt bng dliu cho dm, t my tnh mic thvc biu Moment cho bn.

General Postproc > Element Table > Define Table, Hi thoi Element Table Data shin ln, vic lm ca bn l bm ADD.

Mn hinh Define Addtional Element Table Items, bng nh ngha cho BEAM 3. Ghi nhy l, User Label for ITEM sc dng li. y bn cn phi nhli mt cht. Mtthanh thng sc 6 thnh phn chuyn vcho 3 phng mt u (3 thnh phn lc, 3thnh phn chuyn vxoay). Thnn mt thanh c 2 u, 1 l I v u kia l J.

Tip: Bn nn t tn cho USER LABLE FOR ITEM lI momentvJ Momentbnhmln gia 2 u ca thanh. Do tnh nng xut ra theo tng thanh mt, v sau ny vttrisang phi ca mn hnh sl chiu +.
http://media.viet3g.com/viet3g/uploadedfiles/aa4984de0398bd7bcf5053f1c3f83ab1.jpg


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Gily Moment cho u thnht: USER LABLE for ITEM bn t l I moment, chn BySequence numbn kia chn SMISC, v g s6 chnh l moment theo phng Z ca dm.Vi J moment , bn g vo l 12, (tng 1 thanh sc 12 thnh phn chuyn v). Bn xemhnh di y. Nhsau khi nhp I MOMENT xong bm APPLY, ng bm OK, nu khng bnsmt thi gian quay li cng vic.

Sau khi xong vic bn bm OK kt thc vi Moment. Tng tvi lc ct. SMISC, 2 vSIMSC, 8(y l lc ct theo phng OY, cn ni lc OX, th khi SIMSC l 1 v 7. Lcct theo OZ, 3, v 9. Moment theo OX l 4 v 10, OY l 5 v 11).

Sau khi kt thc bn sthu c bng kt qunh sau:

ng bng ELement Table Data bng cch bm Close. By givic lm duy nht l vbiumoment v lc ct cho bi ton.

General Postproc > Plot Results > Contour Plot > Line Elem Res

Plot Line, cho Node I v Node J (mc d chng ta m hnh bi ton bngKeypoint nhng iu khng nh hng v 1 thanh vn c im u v imcui) ti NODE I chn I FORCE, v node J chn J FORCE nh hnh vdi.
http://media.viet3g.com/viet3g/uploadedfiles/969e5d1dc4ecbf33a799d221556e9ac8.jpghttp://media.viet3g.com/viet3g/uploadedfiles/29c9fa80165894d6744347e0b8d286cf.jpghttp://media.viet3g.com/viet3g/uploadedfiles/969e5d1dc4ecbf33a799d221556e9ac8.jpghttp://media.viet3g.com/viet3g/uploadedfiles/29c9fa80165894d6744347e0b8d286cf.jpg


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Def Shape Only: Chhin chuyn v, Def + Undeformed: hin chuyn vv hnh ban u cadm. ( Def vit tt ca chDeflection). Bm OK bn sthu c biu lc ct nh sau:
http://media.viet3g.com/viet3g/uploadedfiles/57031d96604d3597d8565720bc6d52f6.jpg


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Tng tvi biu moment bn cng c:
http://media.viet3g.com/viet3g/uploadedfiles/49c995db9908f22738dfb09e38ce68ea.jpg


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Tip: Trong trng hp bn mun xut kt quny ra WINWORD (WORD) bn c thlmnh sau bnn en ca mn hnh i m khng cn chnh sa. Tmenu chnh PlotCtrls-> Write Metafile -> Invert Black/White. Gith bn c bn rt p.

10. Kim nh kt qubng tnh ton tay.

Nh ni trn, kt qutnh tay cho thy sngc du khi em so snh 2 kt quli vinhau. Do my tnh tnh ton kn cng ca dm v hsPoisson nn khi tnh ton,kt qusgim i do nh hng bi cng.

L do gy ra sngc chiu gia 2 kt qul, squy c.
http://media.viet3g.com/viet3g/uploadedfiles/327d1c03919aa0986ebe350818515cab.jpg


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Ngun VIET3g.com
http://media.viet3g.com/viet3g/uploadedfiles/346a2c34760d31f44974dd8e75140c3f.jpg

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