Block Format Keyword Describes the node box groups which are inside the box.


Only one box_ID is allowed:
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)


Field Contents SI Unit Example
grnd_ID Node group identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

grnd_title Node group title

(Character, maximum 100 characters)

box_ID Box identifier, which is defined in Boxes

(Integer, maximum 10 digits)



  1. Node groups are used to define secondary nodes of rigid walls, interfaces, rigid bodies or nodes to which a load is applied, like a concentrated load or a fixed velocity.
  2. Nodes are stored in this order. For all other input types, nodes are sorted.
  3. If type is BOX, all nodes inside the box are selected.