CELL
Bulk Data Entry Defines a unit cell comprised of lattice entities which can be used for space filling via the DLATTICE entry.
Format
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| CELL | CELLID | ||||||||
| ROD | R1_ID1 | R1_ID2 | R1_RAD1 | R1_RAD2 | |||||
| ROD | R2_ID1 | R2_ID1 | R2_RAD1 | R2_RAD2 | |||||
| etc | |||||||||
| ID1 | X1 | Y1 | Z1 | ||||||
| ID2 | X2 | Y2 | Z2 | ||||||
| etc |
Example
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| CELL | 2 | ||||||||
| ROD | 1 | 3 | |||||||
| ROD | 3 | 2 | |||||||
| 1 | 0.0 | 1.0 | 2.0 | ||||||
| 2 | 1.0 | 3.0 | 4.0 | ||||||
| 3 | 6.0 | 2.0 | 0.5 |
Definitions
| Field | Contents | SI Unit Example |
|---|---|---|
| CELLID | Unit cell
identification number. This ID can be referenced on the
CELLID field of a
DLATTICE Bulk Data Entry. No default (Integer > 0) |
|
| ROD | Flag indicating that the rod connectivity information is to follow. | |
| Ri_ID1 | Identifies the first
point of the ROD “i" by referencing an
IDi field value. No default (Integer > 0) |
|
| Ri_ID2 | Identifies the second
point of the ROD “i" by referencing an
IDi field value. No default (Integer > 0) |
|
| Ri_RAD1 | Defines the radius of
the ROD “i", at the end of 1. 3 (Blank or Real > 0) |
|
| Ri_RAD2 | Defines the radius of
the ROD “i", at the end of 2. 3 (Blank or Real > 0) |
|
| IDi | Identification numbers
of points in the basic coordinate system. These points are used
to identify rod connectivity to construct the unit cell. No default (Integer > 0) |
|
| Xi, Yi, Zi | Coordinates in the
basic coordinate system of corresponding points
IDi. No default (Real) |
Comments
- The unit cell defined via CELL Bulk Data Entry can be referenced on the DLATTICE Bulk Data Entry to create a filled volume with unit cells.
- Currently only ROD entities are supported and they are replaced by CBEAM elements when used on the DLATTICE Bulk Data Entry.
- The Ri_RAD1 and Ri_RAD2 entries allow definition of rods with non-uniform radii. If both the entries are blank, rods of constant radius are defined. If the radius at one end is specified, the radius at the other end must also be specified.