BSSEG (Boundary Surface Segments)

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

1. 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.
2. A triangular segment is defined by specifying a zero or blank for the fourth node.
3. 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.