Boundary Surface Segments
Description: Defines a surface which is comprised of a quadrilateral or triangular segments via grid points that may come in contact with another surface.
Format:
Example:
Alternate Format and Example:
| Field | Definition | Type | Default |
|---|---|---|---|
| ID | Boundary surface identification number. | Integer > 0 | Required |
| Gi | Grid point identification number(s). Grid points form quadrilateral or triangular segments of a surface and must be ordered so that the normal to the segment points toward the other surface using the right hand rule. See Remark 2. | Integer > 0 | Required |
Remarks:
- Boundary surface identification numbers must be unique with respect to all other BLSEG and BSSEG entries.
- A triangular segment is defined by specifying a zero or blank for the fourth node.
- The normal to the segment is determined by the ordering of the segment nodes using the right hand rule. Each segment normal of a contact surface must point toward the opposite surface.
- The alternate format should only be used when referenced as a secondary surface on a BSCONP entry with unsymmetric penetration specified.