Block Format Keyword Generates a group of nodes by listing the first and last node IDs in the range.


For each list, enter first node and last node (any number of lists may be input, up to 5 per Line). All nodes between first_ID and last_ID inclusive are selected.

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
first_ID1 last_ID1 first_ID2 last_ID2 first_ID3 last_ID3 first_ID4 last_ID4 first_ID5 last_ID5


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)

first_ID1, last_ID1,...first_IDn, last_IDn List of first and last node identifiers




  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.