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When using the ADAMS.MAC macro to generate MNFs (Modal Neutral Files) for ADAMS/Flex, the resulting file is very large. What can be done to reduce the file size?

- March 17, 2023 at 9:00 am
  
  FAQ
  Participant
  
  The MNF can be optimized in the ADAMS/Flex Toolkit program, such as computing the inertia invariants, removing internal element faces, and/or using single precision. The procedure can also be performed when generating the MNF with the ADAMS.MAC macro by setting the system environment variable MDI_MNFWRITE_OPTIONS. The values of this system environment variable is a comma-separated list, which includes “single” (single precision), “fast_invar” or “full_invar” to pre-compute the partial or full set of invariants, “strip_face” to remove internal element faces, and “coarsen(res,ang,colin)” to coarsen the mesh based on a ‘percent resolution,’ ‘tolerance angle,’ and removal of ‘colinear points’ (0 < res < 0.5, 0 < ang < 45, colin=0, 1). Please refer to the ADAMS/Flex documentation ("Setting Up Translation Options through the MNF Toolkit") for details on all supported options.

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