RBAR – Rigid Bar
Defines a rigid bar with six degrees of freedom at each end.
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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RBAR |
EID |
GA |
GB |
CNA |
CNB |
CMA |
CMB |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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RBAR |
5 |
1 |
2 |
234 |
123 |
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Field |
Contents |
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EID |
Unique element identification number. |
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GA,GB |
Grid point identification number of connection points. (Integer > 0) |
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CNA,CNB |
Independent degrees of freedom in the global coordinate system for the element at grid points GA and GB. Up to six unique digits (0 < digit < 6) may be placed in each field with no embedded blanks, or the field may be left blank. See comment 1. |
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CMA,CMB |
Component numbers of dependent degrees of freedom in the global coordinate system assigned by the element at grid points GA and GB. Up to six unique digits (0 < digit < 6) may be placed in each field with no embedded blanks, or the field may be left blank. See comment 2. |
The total number of components in CNA and CNB must equal six, e.g., CNA = 1236, CNB = 34. Furthermore, they must jointly be capable of representing any general rigid body motion of the element.
If both CMA and CMB are zero or blank, all of the degrees of freedom not in CNA and CNB are made dependent.
The degree of freedom declared dependent on this entry may not be:
- Included in a single point constraint (SPC or SPC1).
- Declared a dependent degree of freedom on any other RBAR, RBE1, RBE2, RBE3, or RROD entry.
- Declared a dependent degree of freedom on an MPC set referenced by a subcase.
Element identification numbers must be unique.
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Guidelines for Bulk Data Entries
Alphabetical List of Bulk Data Entries