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FEMZIP is a specialised tool for the compression of LS-DYNA results developed by The Fraunhofer Institute
for Algorithms and Scientific Computing. It reads in the plot state files (d3plot, *.ptf)
then reconstructs them to produce a compressed (zipped) version of the results that can be up to ten times smaller.
Advantages
FEMZIP reduces
- size of archives
- data transfer times
- data loading times into post processors
The high compression rates of FEMZIP means storage and backup resources can be reduced and results files
can be quickly and easy transferred across networks.
Post Processing Results
Oasys D3PLOT directly reads this compressed results file reducing the time taken to read in and animate
a full car model by up to 60% depending on network speeds.
Functionality and Settings
FEMZIP compresses the results data by reducing the number of significant figures used to store data.
Typically LS-DYNA uses 7 significant figures; a much higher level of accuracy than is required by the user.
The number of significant figures FEMZIP reduces the data by can be controlled by the user through a parameters file
which specifies the required accuracy for each data type (velocity, stress, etc).
Decompression
The decompression tool (FEMUNZIP) is also available free of charge allowing compressed files to be sent to and
accessed by everyone, not just FEMZIP customers.
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