Vector Collectors and Vectors
Vector Collectors
Vector collectors collect and organize vectors.
Nastran Cards
Vectors can be used to define orientation directions for some 1D elements and forces, or to
define the SNORM card. For orientation vectors, it is not necessary to load any card image
data onto the vector collector. For SNORM vectors, you must load the SNORM card image onto
the vector collector. Once this is done, all vectors organized into that vector collector
will write out as SNORM vectors to the Nastran bulk data
file.
| Card | Description |
|---|---|
| SNORM | Defines a surface normal vector at a grid point for CQUAD4, CQUADR, CTRIA3,
and CTRIAR shell elements. Note: There is no card image associated with the
collector. In order to view the actual SNORM cards, each vector must be
individually card edited. Loading the SNORM card image onto the collector
assigns the SNORM type onto all of the vectors contained in that
collector.
|
PAM-CRASH Cards
| Card | Description |
|---|---|
| ADAPT / | |
| PICK / | |
| SUBDF / | Substructure definition |
Vectors
Vector entities allow for the definition of a vector in 3D space. Vectors can be created using three methods; base & magnitude, two nodes, or cross-product.
LS-DYNA Cards
| Card | Description |
|---|---|
| *DEFINE_SD_ORIENTATION | Define orientation vectors for discrete springs and dampers. |
| *DEFINE_VECTOR | Define a vector by defining the coordinates of two points. |