LS Dyna

LS Dyna

LSTASC ERROR

    • shk1048
      Subscriber
      *** Warning Bracketing to satisfy mass fraction found constant function values in iteration 17.
      Bracketing message was "Function is constant".  0 bracketing iterations used.
       *** Warning Bracketing may have failed due to a mismatch between the desired mass flow (step size) and the mass fraction move limits
      Bracketing started with a mass fraction of          1 to be compared with a required, final value       1.04. This suggests a mass flow of larger than     0.0358. Maybe the mass flow of          0 was set too small.
      Either the desired mass flow must be increased or the part mass fraction move limits must be decreased in such a case.
      If the desired mass flow was decreased by the user then the problem is likely be that the part mass fraction move limits was not decreased by a similar amount.
       *** Warning The mass flow of          0 was set too small. A value larger than     0.0358 is required. The start mass fraction is          1, while the required mass fraction is       1.04.
       
       *** Halting design procedure as converged.

      After this error my part has again add all the masses...didnot really understood it!!
       
    • Imtiaz Gandikota
      Ansys Employee
      Please try suggestions recommended in the error. Try to increase mass flow or decrease move limits. This can be done from method panel. 
       
      computation> projected subgradient > desired mass flow > 
       
      or multipoint settings > mass fraction move limits. 
       
      You can restart after making these changes. 
       
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