Block Format Keyword
/RLINK - Rigid Link
Description
Defines a rigid link. The rigid link imposes the same velocity on all the slave nodes in one or more directions.
Format
(1)
|
(2)
|
(3)
|
(4)
|
(5)
|
(6)
|
(7)
|
(8)
|
(9)
|
(10)
|
/RLINK/rlink_ID
|
rlink_title
|
Trarot
|
skew_ID
frame_ID
|
grnod_ID
|
Ipol
|
|
|
|
|
|
|
Field
|
Contents
|
rlink_ID
|
Rigid link integer
(Integer, maximum 10 digits)
|
rlink_title
|
Rigid link title
(Character, maximum 100 characters)
|
Trarot
|
Codes for translation and rotation
(6 Booleans)
= 0: free DOF
= 1: fixed DOF
|
skew_ID
frame_ID
|
Frame identifier for Ipol=0 or frame identifier for Ipol=1 (Comment 3)
If skew_ID ≠ 0: the code refers to this local skew (or frame) identifier.
If skew_ID = 0: the code refers to the global coordinate system.
(Integer)
|
grnod_ID
|
Slave nodes group identifier
(Integer)
|
Ipol
|
Polar rigid link flag (Comment 3)
(Integer)
= 0: default, DOF determined in a Cartesian coordinate system
= 1: DOF determined in a polar coordinate system
|
|
If Ipol = 0
(1)-1
|
(1)-2
|
(1)-3
|
(1)-4
first boolean
|
(1)-5
second boolean
|
(1)-6
third boolean
|
(1)-7
|
(1)-8
fourth boolean
|
(1)-9
fifth boolean
|
(1)-10
sixth boolean
|
|
|
|
TX
|
TY
|
TZ
|
|
 X
|
Y
|
Z
|
If Ipol = 1
(1)-1
|
(1)-2
|
(1)-3
|
(1)-4
first boolean
|
(1)-5
second boolean
|
(1)-6
third boolean
|
(1)-7
|
(1)-8
fourth boolean
|
(1)-9
fifth boolean
|
(1)-10
sixth boolean
|
|
|
|
Trad
|
Taxial
|
Ttang
|
|
rad
|
axial
|
tang
|
Field
|
Contents
|
TX
|
Code for translation along X-axis
(Boolean)
|
TY
|
Code for translation along Y-axis
(Boolean)
|
TZ
|
Code for translation along Z-axis
(Boolean)
|
X
|
Code for rotation around X-axis
(Boolean)
|
Y
|
Code for rotation around Y-axis
(Boolean)
|
Z
|
Code for rotation around Z-axis
(Boolean)
|
Trad
|
Code for translation in radial direction
(Boolean)
|
Taxial
|
Code for translation in axial direction
(Boolean)
|
Ttang
|
Code for translation in tangential direction
(Boolean)
|
rad
|
Code for rotation in radial direction
(Boolean)
|
axial
|
Code for rotation in axial direction
(Boolean)
|
tang
|
Code for rotation in tangential direction
(Boolean)
|
|
| 1. | The velocity is computed using momentum conservation equations. However, no global momentum equilibrium is respected. |
| 2. | Input format details for Trarot are shown above. The six individual boolean codes (one per direction) must be right justified in the 10 character fields used by the Trarot variables. |
| 3. | If Ipol =1, polar coordinate system is used; frame_ID definition is compulsory. In this case, not only direction of the axis is set, but also the position of the center of the polar coordinate system. |
| • | The first boolean code corresponds to the radial direction effect |
| • | The second boolean code corresponds to the axial effect |
| • | The third boolean corresponds to the tangential effect |
| • | Axial direction is defined by the X direction of the frame |
| • | Radial direction is orthogonal to axial direction and is passing through concerned node |
| • | Tangential direction is orthogonal to axial and radial directions |
|
See Also:
Incompatible Kinematic Conditions in User's Guide
Implicit Features and Compatibility Information
Skew and Frame (/SKEW & /FRAME)
Rigid Links in User's Guide
Rigid Link in Theory Manual
Example 3 - S-beam Crash
