MBDSRF

Bulk Data Entry Defines a multibody deformable surface.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MBDSRF SRFID NROW NCOL ENDTYPE NSEGU NSEGV
G1 G2 G3 G4 G5 G6 etc

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
MBDSRF 1 3 6 NATURAL 100 100
201 202 203 204 205 206 207 206
209 210 211 212 213 214 215 216
217 218

Definitions

Field Contents SI Unit Example
SRFID Surface identification number.

No default (Integer > 0)
NROW Number of rows of nodes.
NCOL Number of columns of nodes.
ENDTYPE Select from:
NATURAL (Default)
PARABOLIC
PERIODIC 1
NSEGU, NSEGV Number of segments along the U and V coordinates used to discretize the deformable surface for animation purposes.

No default (Integer > 0)
G1, G2, … Row-wise list of nodes. The first NROW IDs form the first row; the second NROW IDs form the second row, and so on. The list must contain a total of NROW*NCOL grid IDs.

Comments

  1. The deformable surface is generated using the CUBIC spline interpolation which requires assumptions on the second derivative of the interpolating function at the end of the surface. The keywords NATURAL, PARABOLIC and PERIODIC represent assumptions defined as follows:
    NATURAL ( or   free ) :   f ″ ( x 0 ) = f ″ ( x N ) = 0 PARABOLIC :     f ″ ( x 0 ) = f ″ ( x 1 ) , f ″ ( x N ) = f ″ ( x N − 1 ) PERIODIC :   f ″ ( x 0 ) = f ( x N − 1 ) , f ″ ( x N ) = f ″ ( x 1 )
  2. The MBDSRF element is not supported by the Force Imbalance method of static equilibrium.
  3. The MBDSRF element does not possess any inherent inertia, stiffness or damping.
  4. This card is represented as a set in HyperMesh.