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

  1. 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.
  2. The superelement will be rotated and translated for alignment of the PAi and PBi locations.
  3. 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.
  4. PB1, PB2, and PB3 must have the same relative locations as PA1, PA2, and PA3.
  5. Three grids are required even if the superelement connects to only one or two exterior grids.
  6. Coordinate systems, global displacement directions, and element coordinate systems for the superelement will rotated and translated.
  7. 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.
  8. This entry will only work if partitioned superelements (BEGIN SUPER) exist.