Check Settings Dialog Box - Intergraph Smart 3D - Administration

Intergraph Smart 3D Geometry Analysis and Repair

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English
Product
Intergraph Smart 3D
Subproduct
Geometry Analysis and Repair
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Administration & Configuration
Smart 3D Version
12.1 (2019)

Provides settings for the Check portion of Process Geometry Data . Geometry that fails a check displays in red in the graphic view.

Severe Geometry Errors

Failed checks require repair prior to using the hullform. The errors will generally cause problems in Molded Forms, and then downstream in Structural Detailing, Structural Manufacturing, and Drawings and Reports.

Outward Normals

Checks the selected objects for outward surface normals. Hullforms require inward-pointing normals. For more information, see General Hullform Requirements. Normals affect molded conventions and thickness direction.

ACIS Errors

Checks the selected objects with the ACIS- supplied functions. The checks are performed at the level defined by the Acis Check Level setting on the Options Dialog Box.

ACIS errors can cause failure to import properly, failure to thicken, and failure to split for a hull plate system. Profiles attached to the surface and bounded structure can also fail. Geometry operations that pass all ACIS checks at level 70 should be successful.

Sliver Faces

Checks the selected objects to ensure that face edges are separated from one another by more than the Points tolerance specified on the Options Dialog Box. The lack of separation causes a sliver face.

Any face can have one or two degenerate edges, but in general, edges must be distinguishable from one another or stitching errors can occur.

Sliver faces can cause hull plate system thickening errors. Structure bounded to the hull in the area of the sliver faces can fail to bound properly. Landing curves for profiles and seams can fail to find an intersection with the hull when crossing a sliver face. Split errors may occur if the seams are close to the sliver faces.

Gaps (C0 Discontinuities)

Checks the selected objects for gaps (ACIS C0 discontinuities). This check ensures that adjacent patch edges are within ACIS’ tolerances for coincidence. If this option is selected, the checks are performed using the tolerance defined by the Points setting on the Options Dialog Box.

Gaps can cause internal structure bounding to the hull to fail. Failures can also occur when placing hull seams or profiles, splitting the hull, thickening hull plate parts, and using some geometric constructions on the hull surface. Gaps are also likely to cause stitching errors and tolerant geometry.

Internal Knuckles (C1 Discontinuities)

Checks the selected objects for internal knuckles. Internal knuckles occur when a knuckled edge is located within one patch (unlike the Knuckled Edges check, which looks for tangential discontinuities across patch boundaries). This check ensures that there are no ACIS C1 discontinuities within any of the faces of the body.

Depending on the angle of the internal knuckle, thickening errors can occur. Profiles on a hull with an internal knuckle automatically generate profile knuckles, or the profile landing curve fails to find an intersection with the hull. Bounded structure can present incorrect ambiguity results.

Geometry Warnings

Failed checks should be investigated, but may not require repair. If failed checks are not corrected, you should test in a non-production database.

Repairs must be made either in the originating third-party application that created the data, or by using one or more of the Advanced Surface Operations or Advanced Curve Operations commands. For more information, see Performing Advanced Operations.

Knuckled Edges

Checks the selected objects for tangent discontinuities across face boundaries that exceed the tolerance specified in the Knuckle box on the Options Dialog Box.

Knuckled patch edges generally create minor errors. Plates with unmarked knuckles could fail to thicken properly. Profile knuckles can generate on profiles crossing a knuckled edge when the plate edge discontinuity is greater than 1º. You should review each unmarked knuckled edge to determine if a knuckle was intended, and add a knuckle reference curve to the edge.

Fuzzy Edges

Checks the selected objects for tangent discontinuities across face boundaries that are greater than the tolerance specified in the Tangents box but less than the tolerance specified in the Knuckles box on the Options Dialog Box.

Fuzzy edges generally do not cause modeling errors, but can result in plate part thickening failures.

Tolerant Geometry

Checks the selected objects for the presence of tolerant edges and/or vertices. Tolerant geometry is commonly found as a result of gaps.

Tolerant geometry may cause thickening operations to fail. Performance of geometric operations can degrade. Profile and seam landing curves and bounded structure that are near the areas of tolerant geometry can fail.

Co-linear Boundary Edges

Checks the selected objects to ensure that none of the face edges in the body have co-linear tangents. This check looks at natural boundaries, not boundaries trimmed by adjacent faces.

If patch boundary edges are collinear, the surface normal direction is not defined, because the cross-product of two collinear vectors is zero. Plate thickening can fail in this area, along with profile systems and plate bounding.

This error can safely be ignored if the collinear boundary edges occur on planar patches.

Trimmed Non-Planar Surfaces

Checks the selected objects for trimmed boundaries, which reduce the active region of the surface from its natural boundaries.

Non-procedural thickening fails on plates made with trimmed non-planar surfaces. Optionally, you can select procedural thickening, so there should be no modeling impact from this warning.

Non-Uniform Control Points

Checks the selected objects to ensure that there are an equal number of control points along the common edges of adjacent faces.

Non-uniform control points usually cause gaps and failed plate part thickening.

Non-Aligned Edges

Checks the selected objects to ensure that adjacent face edges are aligned along the common boundary.

Non-aligned edges usually cause gaps and failed plate part thickening.

Multi-lump Bodies

Checks the selected objects to see if they are ACIS bodies with more than one lump (disjoint geometry objects).

The software expects that all surface patches can be joined into a single contiguous set of surfaces (a single lump). If multiple lumps exist, then bounding and splitting fail. Landing curves created on multi-lump plates also fail.

Select All

Selects all checks.

Select None

Clears all checks.

Execute

Runs the check process for the selected checks. The software displays for the checks that fail and for the checks that succeed.