SELOC
Bulk Data Entry Defines a partitioned superelement relocation by listing three noncolinear grids in the superelement and three corresponding grids not belonging to the superelement.
Format
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| SELOC | SEID | PA1 | PA2 | PA3 | PB1 | PB2 | PB3 |
Example
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| SELOC | 1001 | 901 | 800 | 103 | 675 | 500 | 13 |
Definition
| Field | Contents | SI Unit Example |
|---|---|---|
| SEID | Identification number of the partitioned superelement. No default (Integer > 0) |
|
| PAi | Identification numbers of three noncolinear grids
(GRID entry) in the partitioned
superelement. No default (Integer > 0) |
|
| PBi | Identification numbers of three grids
(GRID entry) defined in the main Bulk
Data section to which PAi will be
aligned. No default (Integer > 0) |
Comments
- SELOC can only be specified in the main Bulk Data section and will cause a fatal error message if it appears after the BEGIN SUPER = n command.
- The superelement will be rotated and translated for alignment of the PAi and PBi locations.
- PA1, PA2, and PA3 must be contained in superelement SEID. PB1, PB2, and PB3 must be specified in the main Bulk Data section. If they belong to a superelement that is also relocated, then the original (unmoved) positions of PB1, PB2, and PB3 are used.
- PB1, PB2, and PB3 must have the same relative locations as PA1, PA2, and PA3.
- Three grids are required even if the superelement connects to only one or two exterior grids.
- Coordinate systems, global displacement directions, and element coordinate systems for the superelement will rotated and translated.
- The translation and rotation of the superelement to the new position
is accomplished by defining local rectangular coordinate systems based on
the specified grid locations:
- The local systems have their origin at PX1 and the x-axis points from PX1 to PX2.
- The y-axis lies in the plane containing PX1, PX2, and PX3, is perpendicular to the x-axis, and points toward PX3.
- The z-axis is defined by the cross product of the x-axis into the y-axis.
- The rotation and translation transformation aligns the local system defined by the superelement grids with the local system defined by the main Bulk Data section grids.
- This entry will only work if partitioned superelements (BEGIN SUPER) exist.