PRIMER 22.1

Format: Setting the File Format

Format: Setting the File Format
By default the Ansys LS-DYNA output mode is "Keep existing", meaning that each master and include file in a model is written out in the format in which it was read. However PRIMER supports the following options:
Small format The default Ansys LS-DYNA output format in which numerical data fields are a mixture of 8, 10 and 16 wide.
I10
Format 		Specified by adding " i10=y " to the *KEYWORD card
  • The same as "small" format except that data fields <10 wide become 10 wide
  • Lines of 10 data fields may be 10 x 10 = 100 characters long
Large format Specified by adding " long=y " to the *KEYWORD card
  • Data fields <20 wide become 20 wide
  • Lines of 8 data fields may be 8 x 20 = 160 characters long
  • Lines of 10 data fields may be 10 x 20 = 200 characters long
  • Filenames, pathnames and parameter expressions using an [A80] data field can be 160 characters long
Keep existing The format of output files is the same as that when they were read in, these settings are applied on a per include file basis. See also Promotion to I10 and Large formats.
Automatic Files default to the smallest possible format that will contain their contents, based on inspecting the largest label size in the model. See also Promotion to I10 and Large formats.
Binary

Proprietary binary format. About 1/3 of the size of the equivalent ascii file, and much faster to write. These files are given the extension ".kby".

This format is described in detail under the Compression tab section.

Ansys LS-DYNA cannot not read this binary format directly. Do not use it if the output is destined for immediate analysis.


With the advent of "i10" format the magnitude of labels is now split into three bands:

Small format *PART, *NODE and *ELEMENT labels must be in the range 1 to 99,999,999

10 wide fields in other contexts permit larger labels, but generally the three above dominate.
i10 format All labels can lie in the range 1 to 9,999,999,999.

However the limit of a single precision signed 32 bit integer is 2,147,483,647 so if single precision Ansys LS-DYNA is to be used, or - more importantly - 32 bit binary output files are to be written then it is best to keep labels inside this limit. PRIMER can impose this as a "soft" label limit, see Setting the current label limits in PRIMER for more information.
Large format All labels can lie in the range 1 to 999,999,999,999,999.

The theoretical limit is higher than this, but it is recommended that this limit of "15 9s" be used. The reasons behind this are discussed in detail in Setting the current label limits in PRIMER

In "automatic" mode the smallest of the three options above that will contain the data is chosen. However if a format that is too small is explicitly chosen in this situation then it will be used until a card containing "i10" or "long" labels is encountered, in which case a new keyword header using the "%" suffix for i10 or the "+" suffix for large will be written and the rest of that particular keyword will be written in teh relevant format.

Details of the way that PRIMER handles large labels may be found in "Long" Keyword Format and Large Labels.


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