基礎(chǔ)知識(shí)3DEC-培訓(xùn)

1、基礎(chǔ)知識(shí)3DEC-培訓(xùn)Training ScheduleOctober 29, 2008 (morning)09:00-10:153DEC Graphical Interface - The new graphical interface for creating and manipulating 3DEC output10:15-10:30 Break10:30-12:00 UDEC/3DEC Application - Model generation including joint structure creation - Simple exercises3DEC 4.10Graphic

2、s Capabilities3DEC Main Windowterminal interfaceplot viewsplot item and view controls3DEC FilesProject File (*.3dprj) The project file contains information related to a specific 3DEC project. This includes links to the data file and save file related to the project, the plot views generated for the

3、project and the gui layout.Data File (*.3ddat) ASCII file listing 3DEC commands that represent the problem being analyzedSave File (*.3dsav) Binary file containing values of all state variables and user-defined conditions at stage that file is savedLog File (*.log) ASCII file that records text appea

4、ring on the screen into a log fileHistory File (*.his) ASCII file record of input or output history valuesPlot File Graphics plot file (in various standard formats)Movie File (*.dcx) String of PCX images that can be viewed as a “movie”TutorialSliding Wedgemass density2000 kg/m3bulk modulus1.0 Gpashe

5、ar modulus0.3 GPanormal & shearjoint stiffness 13.3 MPa/mjoint friction angle20odip = 30o dip direction = 270oModel Building in 3DECTwo approaches:Cut up a large polygon into the desired geometryCreate separate polyhedra and connect them togetherModel generation commands to create and shape a la

6、rge polyhedronPOLY brick xl,xu yl,yu zl,zu POLY face xa1,ya1,za1 xa2,ya2,za2 . face xb1,yb1,zb1 xb2,yb2,zb2 . . .POLY prism a xa1,ya1,za1 xa2,ya2,za2 . b xb1,yb1,zb1 xb2,yb2,zb2 .POLY tunnelkeywords .Model generation commands to cut up a large polyhedronJSETkeywords .TUNNEL region n .POLY cubePOLY f

7、ace &POLY brickpoly &face 0,0,0 1,0,0 1,1,0 0,1,0 &face 0,0,0 0,0,1 1,0,1 1,0,0 &face 0,0,0 0,1,0 0,1,1 0,0,1 &face 1,1,1 1,1,0 1,0,0 1,0,1 &face 1,1,1 1,0,1 0,0,1 0,1,1 &face 1,1,1 0,1,1 0,1,0 1,1,0poly brick 0,1 0,1 0,1POLY prismpoly prism a (0,0,0) (-.5,.87,0) (-.5,1.8

8、7,0) (0,2.74,0) & (1,2.74,0) (1.5,1.87,0) (1.5,.87,0) (1,0,0) & b (0,0,4) (-.5,.87,4) (-.5,1.87,4) (0,2.74,4) & (1,2.74,4) (1.5,1.87,4) (1.5,.87,4) (1,0,4)POLY tunnelpoly tunnel rad=2 leng=-10,10 ratr=3.0 dip=0 dd=0 nr=2 nt=1 nx=3delete -2 2, -10 10 -2 2join onjoin onFracture/joint repre

9、sentation in 3DEC Fractures are represented by cuts in blocks Cuts must “knife” completely through a particular block Blocks can be hidden to avoid cutting Blocks can be joined at common faces to form concave blocks Fracture termination within block is accounted for by either: adjusting rock stiffne

10、ss using high strength for non-fracture portion of cutJoint generation commandsJSET dip v1 dd v2 origin x y z persistence p num n spacing s id iHIDE/SEEKJOIN on/offDefinition of joint orientation3DEC 4.1 uses left-handed (CONFIG lhs) or right-handed (CONFIG rhs) coordinate systems (by default, right

11、-handed)JSET creates single or multiple cutsHIDE and SEEK control continuity of cutsright-handed systempoly brick 0,1 0,1 0,1 ; create a blockjset dip 0 dd 0 or 0,.5,0 ; make a horizontal cuthide dip 0 dd 0 or 0,.5,0 below ; hide the bottom blockjset dip 90 dd 90 or .5,0,0 ; vertical cut through top

12、 block onlyseek ; make all blocks visibleJSETpoly brick 0 80 -30 80 0 50; shallow-dipping fracture planes (continuous)jset dip 2.45 dd 235 org 30 0 12.5jset dip 2.45 dd 315 org 35 0 30; high angle foliation planes (continuous)jset dip 76 dd 270 spac 16 num 3 org 30,0,12.5; intersecting discontinuiti

13、es (non-continuous)hide range x 0,80 y 0,50 z 0,10hide range x 55,80 y 0,50 z 0,50jset dip 70 dd 200 org 0 35 0jset dip 60 dd 330 org 50 15 50seekhide range x 0,30 y -30,80 z 13,50JSETconfig lhpoly brick -1.5,1.5 -1.5,1.5 -1.5,1.5tunnel radial region 1 & a (-0.30,0.00,-1.5) (-0.3,0.40,-1.5) (-0.

14、25,0.47,-1.5) & (-0.15,0.52,-1.5) ( 0.0,0.55,-1.5) ( 0.15,0.52,-1.5) & ( 0.25,0.47,-1.5) ( 0.3,0.40,-1.5) ( 0.30,0.00,-1.5) & b (-0.30,0.00, 1.5) (-0.3,0.40, 1.5) (-0.25,0.47, 1.5) & (-0.15,0.52, 1.5) ( 0.0,0.55, 1.5) ( 0.15,0.52, 1.5) & ( 0.25,0.47, 1.5) ( 0.3,0.40, 1.5) ( 0.30,0.00, 1.5)remove region 1TUNNELBoundary locationsExtreme grids “tunnel” sizes are the samestressdisplacementPract