Coupled Degrees of Freedom

Coupled degrees of freedom are defined via the following FEMGEN command:

PROPERTY BOUNDARY GENERAL part1 idof1 part2

Where either part1 and part2 are separate parts of the model with equal numbers of nodes, or part1 is a point and part2 is a part associated to it.

The interface will create 'CP' commands for each node pair, in the first case. In the second case, a node set with the node of part1 and the nodes of part2 will be generated and the 'CP' command applied to this set.

Example FEMGEN Command:

PROPERTY BOUNDARY GENERAL CO3  L2   123  L6

Corresponding ANSYS Input Deck:

CP,NEXT,UX  ,     5,    30
CP,NEXT,UY  ,     5,    30
CP,NEXT,UZ  ,     5,    30
CP,NEXT,UX  ,    10,    35
CP,NEXT,UY  ,    10,    35
CP,NEXT,UZ  ,    10,    35
CP,NEXT,UX  ,    15,    40
CP,NEXT,UY  ,    15,    40
CP,NEXT,UZ  ,    15,    40
CP,NEXT,UX  ,    20,    45
CP,NEXT,UY  ,    20,    45
CP,NEXT,UZ  ,    20,    45
CP,NEXT,UX  ,    25,    50
CP,NEXT,UY  ,    25,    50
CP,NEXT,UZ  ,    25,    50

Example FEMGEN Command:

PROPERTY BOUNDARY GENERAL CO1  P9   3  S2

Corresponding ANSYS Input Deck:

NSEL,S,NODE,,    65
NSEL,A,NODE,,    17
NSEL,A,NODE,,    18
NSEL,A,NODE,,    19
NSEL,A,NODE,,    20
NSEL,A,NODE,,    21
NSEL,A,NODE,,    22
NSEL,A,NODE,,    23
NSEL,A,NODE,,    24
NSEL,A,NODE,,    25
NSEL,A,NODE,,    26
NSEL,A,NODE,,    27
NSEL,A,NODE,,    28
NSEL,A,NODE,,    29
NSEL,A,NODE,,    30
NSEL,A,NODE,,    31
NSEL,A,NODE,,    32
CP,NEXT,UZ   ,ALL
NSEL,ALL