- YES (Default)
- All gap elements of non-zero length (distance between
GA-GB) that have a prescribed coordinate system
CID are checked for misalignment
of gap prescribed axis (x-axis of
CID) with the vector
GA->GB (angles
larger than 30 degrees produce errors). The amount of
output is limited to the first ten occurrences. Note
that this check applies correctly to the most typical
situations where in there is an initial opening between
bodies A and B, and the gap element is used to enforce
non-penetration condition (for other cases, see the
REVERSE option below).
- NO
- No gap CID direction checks are
performed.
- WARN
- Only warnings are issued.
- FULL
- The error or warning messages are printed for all gap
elements violating this check.
- REVERSE
- Orientations of vector
GA->GB generally
opposite to the prescribed x-axis of
CID system are also accepted
(this can be used in cases when gap is used to model
rope behavior or when there is initial penetration,
rather than gap, between bodies A and B). The tolerance
levels are the same as for YES, except
that they are measured from either 0 or 180 degrees
reference angle.
For more details, refer to the CGAP description.
PARAM, CHKGPDIR is
superseded by the CKGAPDIR parameter on the
GAPPRM Bulk Data Entry, if present.
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