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General Mechanical

General Mechanical

Topics related to Mechanical Enterprise, Motion, Additive Print and more.

UPF gives different results with the same input file

    • dka
      Subscriber

      Hello

      I have a question regarding UPF, I have coded a user defined element with Fortran and I linked it with APDL through oneAPI compiler. My doubt is sometimes the results are correct and sometimes not! with EXACATLLY the same input file ! I don't know if this may be a compiler problem or not!

      Any help would be appreciated!

      Thanks!

    • David Weed
      Ansys Employee
      Hi @dka, can you let me know which version of ANSYS are you using? We have specifications for which compilers are supported for a given version. ANSYS doesn't officially support oneAPI, and this could be a source of inconsistent results.
    • dka
      Subscriber
      thank you very much for your reply. What I have discovered later is that this happens when I calculate the stiffness matrix and internal force vector in an early step, depending on the pure input TotValDofs. In the Userelem.F file they are calculated later. As I understood, calculating them early affected the displacements values in the next iterations and also the force vector itself was not being calculated by the true displacements.
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