HD28401: DMUFIT: MEASURED VOLUME AREA ON SAVED SWEPT VOLUME GIVES CLEARL Y INCORRECT RESULTS.

APAR status

• Closed as Permanent restriction.

Error description

• ABSTRACT: DMUFIT: MEASURED VOLUME/AREA
  ON SAVED SWEPT VOLUME GIVES CLEARLY
  INCORRECT RESULTS.
  .
  SCENARIO:
  1. Open sample.CATProduct. This consists of a
  part, with a cubic pad (10mm x 10mm) and a track
  which sweeps the part 100mm.
  2. Change to DMUFitting workbench.
  3. Select swept volume icon and track.1, Preview
  appears.
  4. Click - Save - save as CGR.
  5. Repeat for .model .wrl and .stl filetypes.
  6. Create a new CATProduct.
  7. Insert existing component and choose the 3 files
  (cgr, stl and wrl) created above ( For stl it is
  necessary to create a new part and import it via
  the Digitized Shape editor workbench).
  8. Using measure item tool measure the
  volume/area of each. WRL: Volume=29000mm^3
  Surface area=19000mm^2. CGR/STL/model:
  Area=19000mm^2.
  .
  RESULT: Result is incorrect.
  .
  EXPECTED RESULT: Expected answer is
  10*10*100=10000mm^3 for the volume and 4*
  (10*100) + 2*(10*10) = 4200mm^2 for the
  surface area.
  .
  

Local fix

Problem summary

• DMUFIT: MEASURED VOLUME AREA ON SAVED SWEPT VOLUME GIVES CLEARL
  Y INCORRECT RESULTS.
  ABSTRACT: DMUFIT: MEASURED VOLUME/AREA
  ON SAVED SWEPT VOLUME GIVES CLEARLY
  INCORRECT RESULTS.
  .
  SCENARIO:
  1. Open sample.CATProduct. This consists of a
  part, with a cubic pad (10mm x 10mm) and a track
  which sweeps the part 100mm.
  2. Change to DMUFitting workbench.
  3. Select swept volume icon and track.1, Preview
  appears.
  4. Click - Save - save as CGR.
  5. Repeat for .model .wrl and .stl filetypes.
  6. Create a new CATProduct.
  7. Insert existing component and choose the 3 files
  (cgr, stl and wrl) created above ( For stl it is
  necessary to create a new part and import it via
  the Digitized Shape editor workbench).
  8. Using measure item tool measure the
  volume/area of each. WRL: Volume=29000mm 3
  Surface area=19000mm 2. CGR/STL/model:
  Area=19000mm 2.
  .
  RESULT: Result is incorrect.
  .
  EXPECTED RESULT: Expected answer is
  10*10*100=10000mm 3 for the volume and 4*
  (10*100) + 2*(10*10) = 4200mm 2 for the
  surface area.
  .
  

Problem conclusion

• THIS PROBLEM IS PERMANENT RESTRICTION IN
  CATIA.
  .
  Incident Diagnosis:
  Sweptvolume does not generate a manifold
  surface. The surface is not closed, nor minimal
  (you can often see inside triangles when you make
  a section of the swept volume). It's not in the
  specification for the swept volume, and it's not to
  be corrected.
  .
  Restriction Explanation:
  Not in the spec of the swept volume to have the
  minimal surface. It's sufficient and appropriate to
  calculate clash detection, but not for volume/area
  calculation.
  .
  By-Pass:
  You can use the wrapping command after a swept
  volume computation. It's meant to give a closed
  volume englobing the result. You can then calculate
  area and volume.
  .
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels