HD64452: ANALYSIS (GSA) : ERROR RATES ARE DIFFERENT WHEN APPLYING DISTRI BUTED FORCE AND TEMPERATURE FIELD

APAR status

• Closed as Permanent restriction.

Error description

• Analysis (GSA) : Error rates are different when
  applying distributed force and temperature field
  .
  Scenario
  1. Open the provided CATAnalyis file.
  2. Click temperature field. Select the body and
  type a value (350K). click ok
  3. Click Compute (all)
  4. Check the error rate by clicking 'precision' and
  then 'Information'. The result is 25.3187%
  5. Check the error rate by clicking 'new
  adaptativity entity' and selecting the mesh part.
  The result is 25.3229%
  Problem : Both results should be the same
  .
  

Local fix

Problem summary

• Analysis (GSA) : Error rates are different when applying distri
  buted force and temperature field
  Analysis (GSA) : Error rates are different when
  applying distributed force and temperature field
  .
  Scenario
  1. Open the provided CATAnalyis file.
  2. Click temperature field. Select the body and
  type a value (350K). click ok
  3. Click Compute (all)
  4. Check the error rate by clicking 'precision' and
  then 'Information'. The result is 25.3187%
  5. Check the error rate by clicking 'new
  adaptativity entity' and selecting the mesh part.
  The result is 25.3229%
  Problem : Both results should be the same
  .
  

Problem conclusion

• null
  ==========*===========*==========
  THIS PROBLEM IS PERMANENT RESTRICTION IN
  CATIA
  .
  Incident Diagnosis
  The estimated global error is not strictly the same
  in the Precision/information window and in the
  Adaptivity box.
  Restriction Explanation
  The two values are not computed exactly by the
  same way.
  In the case of Precision/information window, the
  value is computed with the global strain energy.
  But in the Adaptivity box, we use the sum of
  internal strain energies because the adaptivity box
  may be defined only on a part of the
  structure.
  In all cases the variation between these two
  methods is very small. In the case of thermal
  loads, large displacements and internal energy are
  created.
  That's why there can be a very small difference
  between those 2 methods when there is a thermal
  load. But in any case, the difference will be very
  very small.
  By-Pass
  none
  .
  

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