RigidDiaphragm command: Difference between revisions
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(New page: This command is used to construct a number of Multi-Point Constraint (MP_Constraint) objects. These objects will constraint certain degrees-of-freedom at the listed slave nodes to move as ...) |
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{{CommandManualMenu}} | |||
This command is used to construct a number of Multi-Point Constraint (MP_Constraint) objects. These objects will constraint certain degrees-of-freedom at the listed slave nodes to move as if in a rigid plane with the master node. | This command is used to construct a number of Multi-Point Constraint (MP_Constraint) objects. These objects will constraint certain degrees-of-freedom at the listed slave nodes to move as if in a rigid plane with the master node. | ||
Revision as of 21:19, 3 March 2010
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This command is used to construct a number of Multi-Point Constraint (MP_Constraint) objects. These objects will constraint certain degrees-of-freedom at the listed slave nodes to move as if in a rigid plane with the master node.
| rigidDiaphragm $perpDirn $masterNodeTag $slaveNodeTag1 $slaveNodeTag2 ... |
| $perpDirn | direction perpendicular to the rigid plane (i.e. direction 3 corresponds to the 1-2 plane) |
| $masterNodeTag | integer tag identifying the master node |
| $slaveNodeTag1 $slaveNodeTag2 ... | integar tags identifying the slave nodes |
NOTE: The constraint object is constructed assuming small rotations.
NOTE: The rigidDiaphragm command works only for problems in three dimensions with six-degrees-of-freedom at the nodes (ndf = 6).
EXAMPLE:
rigidDiaphragm 2 2 4 5 6; constrain nodes 4,5,6 to move as if in the same x-z plane as node 2.
Code Developed by: fmk