Block2D Command: Difference between revisions
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{{CommandManualMenu}} | |||
The block2D command generates meshes of quadrilateral elements in two or three dimensions. In three dimensions, a two-dimensional surface appropriate for shell analysis is generated. | The block2D command generates meshes of quadrilateral elements in two or three dimensions. In three dimensions, a two-dimensional surface appropriate for shell analysis is generated. | ||
{| style="background:yellow; color:black; width:800px" | {| style="background:yellow; color:black; width:800px" | ||
| '''block2d $nx $ny $e1 $n1 element | | '''block2d $nx $ny $e1 $n1 element elementArgs {''' | ||
|- | |- | ||
| '''1 $x1 $y1 <$z1>''' | | '''1 $x1 $y1 <$z1>''' | ||
| Line 36: | Line 38: | ||
| '''$n1 ''' || node from which the mesh generation will start | | '''$n1 ''' || node from which the mesh generation will start | ||
|- | |- | ||
| '''element ''' || string defining which quadrilateral elements is being used ([[Quad Element|quad]], [[Shell Element|ShellMITC4]], [[Bbar Plane Strain Quadrilateral Element|bbarQuad]], or [[Enhanced Strain Quadrilateral Element|enhancedQuad]] | | '''element ''' || string defining which quadrilateral elements is being used ([[Quad Element|quad]], [[Shell Element|ShellMITC4]], [[Bbar Plane Strain Quadrilateral Element|bbarQuad]], or [[Enhanced Strain Quadrilateral Element|enhancedQuad]]) | ||
|- | |- | ||
| ''' | | '''elementArgs ''' || list of data parameters for element being used | ||
|- | |- | ||
| '''{$x1, .... ,$x9} {$y1, .... ,$y9} ''' || coordinates of the block elements in two dimensions | | '''{$x1, .... ,$x9}, {$y1, .... ,$y9} ''' || coordinates of the block elements in two dimensions | ||
|- | |- | ||
| '''{$z1, .... $z9} ''' || coordinate of the block elements in third dimension (optional, default=0.0) | | '''{$z1, .... $z9} ''' || coordinate of the block elements in third dimension (optional, default=0.0) | ||
|} | |} | ||
---- | |||
NOTE: | |||
1. Only the first four nodes (1-4) are required. Nodes 5-9 are used to generate curved meshes. The user may specify any combination of nodes 5-9, omitting some of them if desired. | |||
2. This command recognizes variable substitutions when the command arguments are placed in quotes. | |||
---- | |||
EXAMPLE: | |||
{| | |||
| '''block2D 16 4 1 1 quad "1 PlaneStrain2D 1" {''' | |||
|- | |||
| '''1 0 0''' | |||
|- | |||
| '''2 40 0''' | |||
|- | |||
| '''3 40 10''' | |||
|- | |||
| '''4 0 10''' | |||
|- | |||
| '''}''' | |||
|} | |||
---- | |||
Node numeration of a quadrilateral element: | |||
[[Image:quadEle.PNG|link=Block2D Command]] | |||
Latest revision as of 23:01, 12 August 2010
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The block2D command generates meshes of quadrilateral elements in two or three dimensions. In three dimensions, a two-dimensional surface appropriate for shell analysis is generated.
| block2d $nx $ny $e1 $n1 element elementArgs { |
| 1 $x1 $y1 <$z1> |
| 2 $x2 $y2 <$z2> |
| 3 $x3 $y3 <$z3> |
| 4 $x4 $y4 <$z4> |
| <5> <$x5> <$y5> <$z5> |
| <6> <$x6> <$y6> <$z6> |
| <7> <$x7> <$y7> <$z7> |
| <8> <$x8> <$y8> <$z8> |
| <9> <$x9> <$y9> <$z9> |
| } |
| $nx | number of elements in the local x directions of the block |
| $ny | number of elements in the local y directions of the block |
| $e1 | element from which the mesh generation will start |
| $n1 | node from which the mesh generation will start |
| element | string defining which quadrilateral elements is being used (quad, ShellMITC4, bbarQuad, or enhancedQuad) |
| elementArgs | list of data parameters for element being used |
| {$x1, .... ,$x9}, {$y1, .... ,$y9} | coordinates of the block elements in two dimensions |
| {$z1, .... $z9} | coordinate of the block elements in third dimension (optional, default=0.0) |
NOTE:
1. Only the first four nodes (1-4) are required. Nodes 5-9 are used to generate curved meshes. The user may specify any combination of nodes 5-9, omitting some of them if desired.
2. This command recognizes variable substitutions when the command arguments are placed in quotes.
EXAMPLE:
| block2D 16 4 1 1 quad "1 PlaneStrain2D 1" { |
| 1 0 0 |
| 2 40 0 |
| 3 40 10 |
| 4 0 10 |
| } |
Node numeration of a quadrilateral element:
