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Found 3 results

  1. Hi, Excuse me but it's about ESLM again... I would like to know more regarding the ESLM's stopping criteria of the outer loop i.e. how are convergence criteria defined in order to stop the ESLM (besides max.no. of iteraitons reached). I know OBJTOL is used in the inner loop (static opt. loop), but not sure whether the outer loop deploys the same criteria. Kind regards, Tanut
  2. I have used OptiStruct nonlinear-response optimization via Equivalent Static Load Method (ESLM) extensively in my research but would like to know more regarding its stopping criteria of the outer loop i.e. How are convergence criteria defined in order to stop the ESLM (besides ESLMAX max.no. of iteraitons reached)? I know OBJTOL is used in the inner loop (linear static opt. loop), but not sure whether the outer nonlinear-response loop deploys the same criteria. I have not found this info in the User’s Guide. I appreciate your kind support in this matter. Mr.ESLM
  3. In ESLM nonlinear-response optimization, I have a buckling constraint (LAMA) as well as a displacement constraint from IMPDYN analysis while min. mass is the design objective. PARAM, ALTBUCK, 0 is specified. CSTRESS is not requested in IMPDYN subcase. However, after the 1st inner loop I experience: *** INTERNAL PROGRAMMING ERROR *** in file "tabscr.F", at location # 1000. **** ABORTING RUN DUE TO AN INTERNAL ERROR **** Please see the attached files for more info. Many thanks, Tanut MT_H_ESLM_2_fem.txt MT_H_ESLM_2_out.txt
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