Description
The BSSEG entry defines a contact surface comprised of quadrilateral or triangular segments (faces) that can come in contact with another contact surface. Each segment (face) is defined by a set of grid points.
Format
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| BSSEG | CSID | G1A | G2A | G3A | G4A | G1B | G2B | G3B | |
| G4B | G1C | G2C | G3C | G4C | -etc.- |
Example
| BSSEG | 2 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | |
| 21 | 27 | 33 | 38 |
Alternate Format and Example
| BSSEG | CSID | G1 | THRU | G2 | BY | INC |
| BSSEG | 10 | 23 | THRU | 55 | BY | 2 |
| Field | Definition | Type | Default |
|---|---|---|---|
| CSID | Contact surface identification number. | Integer > 0 | Required |
| Gi | Grid point identification numbers. Grid points define quadrilateral or triangular segments (faces) of a surface and must be ordered so that the normal to the segment points outward. See Remark 3. | Integer > 0 | Required |
Remarks
- Contact surface identifiers, CSID, must be unique with respect to all other BSSEG entries. They must also be unique with respect to the CSID’s generated with a CONTACTGENERATE command. See the description of the CONTACTGENERATE command.
- 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 define the outward normal of the face.