WORKSHOP 9 HEX MESH USING SWEEP VECTOR

Transcription

1 WORKSHOP 9 HEX MESH USING SWEEP VECTOR WS9-1

2 WS9-2

3 Prolem Desription This exerise involves importing urve geometry from n IGES file. The urves re use to rete other urves. From the urves trimme surfes re rete The trimme surfes re Pver meshe. For the meshing, lists(e.g. `list`) re use for the list of surfes. An IsoMesh is rete using two prllel opposing urves. Prior to meshing selet surfe eges n urves re mesh seee to fore the esire mesh size in selet regions. Finlly, the 2D qurlterl elements re swept to rete 3D hexherl elements. Some 2D elements re extrue using onstnt sweep vetor, e.g. <x y z>. Other elements re swept using previously rete vetor fiel. WS9-3

4 Suggeste Exerise Steps 1. Crete new tse. 2. Import the IGES file with urves. 3. Crete urve to interset two urves. 4. Brek two vertil urves for sie of moel. 5. Brek the reking urve. 6. Chnge the geometri shrink. 7. Crete group for qurter of the moel. 8. Brek fillet urve. 9. Disply trimme surfe lel for susequent trimme surfe retion. 10. Crete urves for trimme surfe retion. 11. Crete trimme surfes. 12. Crete mesh sees on selet surfe eges. 13. Crete the meshes for the surfes. 14. Crete lists for sweeping to rete soli elements. 15. Crete soli element meshes y sweeping. 16. Crete sptil vetor fiel. 17. Crete the reminer of the soli elements y sweeping using vetor fiel. 18. Disply of ll the soli elements. 19. Look for element free eges 20. Quit MSC.PATRAN. WS9-4

5 Step 1. Crete New Dtse Crete new tse lle on_ro... File/New.. Enter on_ro. for File nme.. Clik on OK.. Uner the New Moel Preferenes selet Bse on Moel for the Tolerne. e. Enter 200 for Approximte Mximum Moel Dimension. f. Selet MSC.Nstrn for Anlysis Coe. g. Selet Struturl for Anlysis Type. h. Clik on OK. e g h f WS9-5

6 Step 2. Import the IGES File With Curves Import the IGES file.. File/Import. Set the Ojet n Soure to Moel n IGES, respetively.. Fin n selet on_ro_new.igs for File nme.. Clik on Apply. e. Clik OK when the import summry ppers. WS9-6

7 Step 3. Crete Curve to Interset Two Curves Crete soli hex mesh for the lower right qurter of the moel. To o this the geometry moel must e eite. First, rete urve to interset setion of the moel.. Geometry: Crete/Curve/ XYZ.. Enter <60 0 0> for Vetor Coorintes List.. Enter [ ] for Origin Coorintes List.. Clik on Apply. Use this urve to rek the two urves tht it intersets. WS9-7

8 Step 4. Brek two Vertil Curves for Sie Brek two vertil urves(curve 27, 28) using the urve just rete(curve 43).. Zoom into moel s inite.. Geometry: Eit/Curve/Brek.. Selet Point for Option.. Selet Delete Originl Curves n Auto Exeute. e. Selet Curve 27 for Curve List. f. Uner Brek Point List selet the Curve interset ion, then Curve ion in the Selet Menu Br. e g. Selet Curve 27, then the interseting urve, Curve 43. h. Reply Yes when ske to elete originl urves. i. Repet the steps for urve 28, using urve 28 for Curve List, n the sme interseting urve. h WS9-8

9 Step 5. Brek the Breking Curve Now rek horizontl urve, Curve 43, t the point rete t n intersetion.. Selet Delete Originl Curves n Auto Exeute.. Selet Curve 43 for Curve List.. Selet the point t intersetion etween Curve 43 n Curve 45 for Brek Point List.. Clik Yes when sk to elete the originl urves. Point t Intersetion Curve 43 WS9-9

10 Step 5. Brek the Breking Curve (Cont.) Delete the urve to the right of the rek point.. Set Ation n Ojet to Delete n Curve, respetively.. Selet Curve 49 for Curve List.. Clik on Apply. Brek point Delete WS9-10

11 Step 6. Chnge the Geometri Shrink Use the geometri shrink to mke piking the entities esier.. Disply: Geometry. Using the slier set the Geometri Shrink to Clik on Apply, then Cnel.. Go to Front view. WS9-11

12 Step 7. Crete Group for Qurter of the Moel Crete group lle qurter_moel tht is to ontin the geometry in the lower right qurter of the moel.. Group: Crete/Selet Entity.. Enter qurter_moel for New Group Nme.. Selet Mke Current n Unpost All Other Groups.. Selet entities in the lower right orner s inite. Mke sure to inlue the points. Set the piking preferene to Enlose entire entity. e. Clik Apply, then Cnel. f. Disply/Geometry g. Chnge the geometri shrink k to 0.0. h. Clik Apply, then Cnel. e WS9-12

13 Step 8. Brek Fillet Curve Brek Curve 33 using the prmetri option.. Turn on the urve lels, n inrese point size.. Geometry: Eit/Curve/Brek.. Set Option to Prmetri.. Enter 0.5 for Brek Point. e. Selet Delete Originl Curves n Auto Exeute. f. Selet Curve 33 for Curve List. e Curve 33 g. Clik Yes when ske to elete the originl urve. h. Turn on the point lels, n turn off urve lels. f g WS9-13

14 Step 9. Disply Trimme Surfe Lel for Cretion Throughout the following steps severl urves will e rete, n they will e use in the retion of trimme surfes.. Disply/Entity Color/Lel/Rener. Selet Lel for Tsurf.. Clik on Apply then Cnel. Note tht there re no surfes. One they hve een rete the lels will pper. WS9-14

15 Step 10. Crete Curves for Trimme Surfes Now, rete 5 urves in orer to rete surfes.. Geometry: Crete/Curve/ Point.. Selet 2 Point for Option.. Selet Auto Exeute.. Uner Strting Point List selet Point 47. e. Uner Ening Point List selet Point 46. f. Below is tle listing the strting n ening points for ll five urves: e Curve First Curve Seon Curve Thir Curve Fourth Curve Strting Point Point 47 Point 44 Point 17 Point 48 Ening Point Point 46 Point 17 Point 3 Point 2 Fifth Curve Point 6 Point 4 WS9-15

16 Step 11. Crete Trimme Surfes Turn off the point lels, turn on the urve lels, turn on the surfe lels, n rete trimme surfes. g h. Turn off point lels, turn on urve lels, n turn on surfe lels.. Geometry: Crete/Surfe/ Trimme.. Selet Plnr for Option.. Clik on Auto Chin e f Chine urve e. Selet Current Group Only n Highlight Chin Cretion. i i f. Deselet Delete Constituent Curves. g. Selet Auto Exeute. h. Selet Curve 26 for Selet Strt Curve. i. Clik on the OK n Next uttons s neee. j. Cnel. The gol is to rete hine urve (see ove), then trimme surfe. Use the Next utton to selet ifferent pth, n the OK utton to ept the urrent pth. WS9-16

17 Step 11. Crete Trimme Surfes (Cont.) Crete the first trimme surfe.. Geometry: Crete/Surfe/ Trimme.. Selet Plnr for Option.. Outer Loop List: selet the hine urve just rete, e.g. Curve 56.. Apply. WS9-17

18 Step 11. Crete Trimme Surfes (Cont.) Continue reting the trimme surfes.. Repet the steps to rete the two remining trimme surfes. WS9-18

19 Step 12. Crete Mesh Sees on Surfe Eges Crete mesh sees spe uniformly long severl eges.. Turn on the urve lels.. Elements: Crete/Mesh See/ Uniform.. Selet Numer of Elements.. Enter 3 for Numer. e. Selet the two urves/eges uner Curve List. f. Clik on Apply. g. Repet the previous steps to rete mesh see with 5 elements on the inite urves/eges. e g 5 elements eh ege 3 elements eh ege e f WS9-19

20 Step 12. Crete Mesh Sees on Surfe Eges (Cont.) Chnge the view to see the other urves/eges.. Viewing: Angles. Selet Moel Asolute for Metho.. Enter for Angles.. Clik Apply, then Cnel. e. Zoom in on the inite re. WS9-20

21 Step 12. Crete Mesh Sees on Surfe Eges (Cont.) Crete mesh sees on itionl eges using one wy is. Elements: Crete/Mesh See/ One Wy Bis.. Selet Num Elems n L2/L1.. Enter 3 uner Numer.. Enter 2 uner L2/L1. e. Selet Auto Exeute. f. Selet Curve for Curve List. g. Chnge the L2/L1 to 0.5. h. Selet Curve 9 12 for Curve List. i. Chnge to Front view n turn off ll lels. j. Use Fit view. f WS9-21

22 Step 12. Crete Mesh Sees on Surfe Eges (Cont.) WS9-22

23 Step 13. Crete Meshes for the Surfes Crete meshes for the surfes.. Elements: Crete/Mesh/ Surfe.. Set Mesher to Pver.. Enter Surfe 1:3 for Surfe List.. Deselet Automti Clution n enter 5.0 for Glol Ege Length. e. Clik on Apply. e WS9-23

24 Step 13. Crete Meshes For the Surfes (Cont.) Mesh the remining surfe re using the 2 Curves option.. Zoom in on inite re, n turn on the urve lels.. Set Type to 2 Curves.. Enter Curve for Curve 1 List.. Enter Curve for Curve 2 List. e. Enter 5.0 for Glol Ege Length. f. Clik on Apply. g. Clik on Fit view n turn off the urve lels. e f WS9-24

25 Step 13. Crete Meshes For the Surfes (Cont.) WS9-25

26 Step 14. Crete Lists for Sweeping to Crete Soli Elements Crete two lists. The first ontining the elements ssoite with the onneting ro inner we, n the other ontining the remining elements ssoite with the other surfes.. Tools/List/Crete. Set the Moel, Ojet, n Metho to FEM, Element, n Assoition, respetively.. Selet Surfe uner Assoition.. Selet Surfe 3 uner Surfe. e. Selet A for the Trget List. g f. Clik on Apply. g. Selet Surfes 1 & 2 for Surfe. h. Chnge the Trget List to B. i. Clik on Apply, then Cnel. e f h i WS9-26

27 Step 15. Crete Soli Element Meshes y Sweeping Crete soli element meshes y sweeping the surfe meshes.. Elements: Sweep/ Element/Extrue.. Clik on Mesh Control... Enter 2 uner Numer.. Clik on OK. e. Enter <0 0 10> for Diretion Vetor. f. Selet Delete Originl Elements. g. Enter `list` for Bse Entity List. h. Clik on Apply. e g The extrue elements n e esily viewe using the Iso 1 view. h WS9-27

28 Step 15. Crete Soli Element Meshes y Sweeping (Cont.) f Extrue the remining surfe elements.. Elements: Sweep/Element/ Extrue.. Uner Mesh Control enter 4 uner Numer, n lik OK.. Enter <0 0 20> for Diretion Vetor.. Selet Delete Originl Elements. e. Enter `list` for Bse Entity List. f. Clik on Apply. g. Clik on the Smooth she ion. e f WS9-28

29 Step 16. Crete Sptil Vetor Fiel Crete sptil vetor fiel for extruing the remining surfe elements.. Fiels: Crete/Sptil/PCL Funtion.. Enter iretion_vetor for Fiel Nme.. Selet Vetor for Fiel Type.. Enter 0. for First Component. e. Enter 0. for Seon Component. f. Enter Z for Thir Component. g. Clik on Apply. h. Set the isply k to wire frme, n selet Front view. e f g WS9-29

30 Step 17. Crete the Reminer of the Soli Elements Crete the remining soli elements y sweeping the remining surfe elements using the vetor fiel.. Elements: Sweep/Element/Vetor Fiel.. Uner Mesh Control set Numer to 4, n lik OK.. Enter iretion_vetor for Fiel Nme.. Selet Delete Originl Elements. e. Selet the remining 2D elements, tht hve not een swept, for Bse Entity List. f. Clik on Apply. g. Go to Iso 1 view. e e f WS9-30

31 Step 18. All the Soli Elements WS9-31

32 Step 19. Look for Element Free Eges Chek the element free eges of the moel, equivlene, then hek the free eges gin.. Elements: Verify/Element/ Bounries.. Clik Apply.. Elements: Equivlene/All/ Tolerne Cue.. Clik Apply. e. Verify the free eges gin y repeting Steps n. WS9-32

33 Step 19. Look for Element Free Eges (Cont.) Chnge the isply to hien line while still in the verify moe.. Clik on the Hien line ion. WS9-33

34 Step 20. Quit MSC.Ptrn Quite MSC.PATRAN.. File : Close. This ens this exerise. WS9-34