CAE (I) Chapter 16. Convergence of Nonlinear Analysis

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Page 48

Restarting an Analysis

  • An analysis which has stopped from normal program termination (STOP button pushed, abort file, solution completed) can be restarted.

  • An analysis which has terminated from the system level (a system break, system crash, or power failure) can not be restarted.

  • You may want to restart an analysis to continue the load history or to recover from a convergence failure.

  • A restart can only be performed from the last converged load step and substep.

  • Procedure for Restarting an Analyis

    • Resume the database and enter solution.

    • Specify that this is a restart analysis (ANTYPE)

    • Define a new load step, or adjust the solution control as necessary.

    • Save the database

    • Initiate a new solution

  • The model must meet the following conditions to restart:

    • Static or transient analysis

    • The initial run must have terminated cleanly

    • The following files must also be available:

      • Jobname.db, jobname.emat, and jobname.esav (or jobname.osav, see next page)

      • Jobname.rst is not required, but if available appended to

  • Presented below are the element saved data file requirements for a restart. Note if jobname.osav is required, it must be copied to jobname.esav before restarting the analysis.