SPC1 – Single-Point Constraint, Alternate Form
Defines sets of single-point constraints.
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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SPC1 |
SID |
C |
G1 |
G2 |
G3 |
G4 |
G5 |
G6 |
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G7 |
G8 |
G9 |
-etc.- |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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SPC1 |
SID |
C |
G1 |
"thru" |
G2 |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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SPC1 |
3 |
2 |
7 |
3 |
10 |
9 |
6 |
5 |
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2 |
8 |
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SPC1 |
2 |
2 |
87 |
"thru" |
100 |
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Field |
Contents |
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SID |
Identification number of single-point constraint set. (Integer > 0) |
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C |
Component number. (Integer zero or blank for scalar points, or up to six unique digits (0 < digit < 6) may be placed in the field with no embedded blanks for grid points. The components refer to the coordinate system referenced by the grid points.) |
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Gi |
Grid or scalar point identification numbers. (Integer > 0) |
Note that enforced displacements are not available via this entry.
Any number of continuations may appear, when "thru" is not used.
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, or RROD entry.
- Declared a dependent degree of freedom on an MPC set referenced by a subcase.
SPC degrees of freedom may be redundantly specified as permanent constraints on the GRID entry.
If the "thru" comment is used G1 and G2 must exist, but the grid points between G1 and G2 are not required to exist.
When the I/O option SPSYNTAX is set to CHECK (the default) or MIXED, it is allowed that when grid lists are provided for a given component, that the grid references be either scalar points (SPOINT) or structural grid points (GRID) when the component is 0, 1 or blank; interpreting all of these as 0 for scalar points and as 1 for structural grids. When SPSYNTAX is set to STRICT it is required for grid/component pairs (G#/C#) that the component be 0 or blank when the grid references are to scalar points (SPOINT), and that the component be > 1 when the grid references are to structural grid points (GRID). When the component is greater than 1, the grid references must always be a structural grid (GRID).
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Guidelines for Bulk Data Entries
Alphabetical List of Bulk Data Entries