RBE2

Bulk Data Entry Defines a rigid body whose independent degrees-of-freedom are specified at a single grid point and whose dependent degrees-of-freedom are specified at an arbitrary number of grid points.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
RBE2 EID GN CM GM1 GM2 GM3 GM4 GM5  
  GM6 GM7 GM8 etc. ALPHA        

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
RBE2 9 8 12 10 12 14 15 16  
  20                

Definitions

Field Contents SI Unit Example
EID Unique element identification number. Must be unique.

No default (Integer)

  
GN The grid point to which all six independent degrees-of-freedom for the element are assigned.

(Integer > 0 or <PartName.number>) 4

  
CM Component number of the dependent degrees-of-freedom in the global coordinate system (local output coordinate system) at grid points GM1, GM2, and so on. Up to six unique digits (1 ≤ digit ≤ 6) may be placed in the field with no embedded blanks.  
GM1,GM2, etc. Grid points at which dependent degrees-of-freedom are assigned.

(Integer > 0 or <PartName.number>) 4

  
ALPHA Thermal expansion coefficient. 5

(Real or blank)

  

Comments

  1. The components indicated by CM are made dependent at all grid points, GMi.
  2. 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
  3. Rigid elements are ignored in heat transfer analysis.
  4. Supported local entries in specific parts can be referenced by the use of "fully-qualified references" on RBE2 entries in the model. A fully-qualified reference (PartName.number) is similar to the format of a numeric reference. PartName is the name of the part that contains the referenced local entry (part names are defined on the BEGIN Bulk Data Entry in the model). number is the identification number of a referenced local entry in the part PartName. See Parts and Instances in the User Guide for detailed information on the use of fully-qualified references.
  5. The thermal expansion effect will be computed, if you supply the thermal expansion coefficient ALPHA, and the thermal load is requested by the TEMPERATURE(INITIAL) and TEMPERATURE(LOAD) Subcase Information Entries. The temperature of the element is taken to be the average of the temperatures at all the nodes of the element. ALPHA is supported for Linear Static, Small and Large Displacement Nonlinear Analysis.
  6. The RBE2GS entry can be used to automatically generate RBE2 elements based on a search distance from a reference grid or location.
  7. This card is represented as a rigid or rigidlink element in HyperMesh.