Block Format Keyword Describes the Lagrange multiplier interface TYPE2.


If the Lagrange multiplier formulation is used:
  • The incompatibility with standard kinematic conditions are checked out automatically in Starter
  • Other Lagrange multiplier conditions may be applied to main and secondary nodes, unless there is a physical incompatibility
  • There is no added mass on main node
  • Kinematic conditions are applied to secondary and main nodes


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
grnd_IDs surf_IDm       Isearch     dsearch


Field Contents SI Unit Example
inter_ID Interface identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

inter_title Interface title

(Character, maximum 100 characters)

grnd_IDs Secondary nodes group identifier


surf_IDm Main surface identifier


Isearch Search formulation flag for the closest main segment
= 0 (Default)
Set to 2
= 1
Old formulation
= 2
New improved formulation


dsearch Distance for searching closest main segment

Default is the average size of the main segments.


[ m ]


  1. The dsearch is computed as:(1)
    d search = 1 n i = 1 n d i