Surface Design Products

 

This page deals with the following products:


Surface Design (SUD)

 

General Issues

LIMIT2 SKIN Checking

A new Skin elements Checking process was introduced in the LIMIT2 function at V4R2.4 level.

The purpose of the Skin Checking process is to control the quality of a V4 topology. It can be used to:

  • visualize any potential invalidity

  • ensure compliance with V4 tolerances rules

  • analyze existing skin quality

This checking Process is launched when creating or modifying a skin. If the checking process detects an error, it is now impossible to create the skin or modify the skin accordingly with LIMIT2.

To analyze and identify the elements subject to errors, the users can launch the command /chktop in order to create a temporary SKIN that will be deleted when exiting the command.

The /chktop command provides additional checks compared with the LIMIT2 function check.

 

User Interfaces and rules

In geometry window, areas subject to errors are visualized as temporary information:

  • on boundary, in red (longest common curve)
  • relevant faces in new colors. For example: blue and green.

 

Defect types: information and messages
Defect Message
Maximum distance between two adjacent faces should be less than identical curve tolerance NON COMMON BOUNDARY
No twist in the area of each surface: the portion of surface containing the face should be twist-free TWISTED SURFACES
For a skin, the number of boundaries is calculated. This message may help the user to identify missing merges between adjacent faces.

Users can use CURVE1/BOUNDARY after in order to visualize these boundaries in case of an error

NUMBER OF BOUNDARIES = n
Superposition test: for each face, a point is defined on the face and the line normal to the surface at this point intersects with all the other faces. If a solution with excessive proximity is found, a message appears warning of the risk of superposition.

This message is for information purpose because a complete superposition test would be expensive, it does not necessarily mean that there is a superposition

RISK OF OVERLAPPING ELEMENTS

Open Issues

None

 

Documentation

None

Advanced Surface Design (ASU)

 

General Issues

None

Open Issues

None

 

Documentation

None