USET1

Bulk Data Entry Defines a set of degrees-of-freedom.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
USET1 SNAME C G1 G2 G3 G4 G5 G6  
  G7 G8 G9 etc.          

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
USET1 U6 123 34 88 4 12 19 7  
  1234 65              

Alternate Format and Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
USET1 SNAME C G1 "THRU" G2        
USET1 U6 123456 88 THRU 207        

Definitions

Field Contents SI Unit Example
SNAME Set name.
= ZEROU6
The degrees-of-freedom are omitted from the set.
≠ U6 or ZEROU6
USET1 will be ignored.

(Character, only U6 or ZEROU6 are allowed)

  
C Component number.

(Integer zero or blank for scalar points, or up to 6 unique digits (0 < integer ≤ 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.)

  
Gi Grid or scalar point identification numbers.

(Integer > 0, for THRU option, G1 < G2)

  

Comments

  1. If the alternate format is used, all points in the sequence G1 through G2 are not required to exist, but there must be at least one boundary degree-of-freedom for the model or a fatal error will result. Any grids implied in the THRU that do not exist will collectively produce a warning message, but will otherwise be ignored.
  2. For normal modes analysis with the Lanczos eigensolver, the case control command RESVEC=YES must be used to create residual vectors based on the USET1 DOF. If the AMSES or AMLS eigensolvers are used, the residual vectors will always be created. The residual vectors are calculated using the unit load method.
  3. USET1 is applied to normal modes analysis subcases that have the case control RESVEC=YES specified. In such cases, residual vectors are calculated using the unit load method. The residual vectors are then exported together with the eigenvectors to the H3D, PUNCH, and OUTPUT2 files. If stress output is requested, the stress state for each mode is output to the H3D, PUNCH, and OUTPUT files.
  4. When the SPSYNTAX setting on the SYSSETTING I/O Option is set to CHECK (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).
  5. This card is represented as a constraint load in HyperMesh.