Archive for September 18th, 2006

Built-In Filtered Nodal Acceleration Output Using IACCOP in *CONTROL_OUTPUT

Published by Suri Bala September 18th, 2006 in LS-DYNA Output. 0 Comments

Starting in LS-DYNA v971, nodal accelerations can be filtered before being output to the ASCII file “NODOUT”. The type of filter can either be a built-in filter based on low-pass Butterworth frequency filter or can be user-defined. The filtering process is turned on by setting the IACCOP=2 in *CONTROL_OUTPUT keyword. The filtering process works by [...]

Contact Force Output to RCFORC

Published by Suri Bala September 18th, 2006 in LS-DYNA Output. 8 Comments

The ASCII file “RCFORC” contains the incremental forces contributed by contact algorithms. Due to the nature of the contact-impact interactions, the raw output tends to be very noisy and is of little value. To eliminate the inherent noise in the contact force output, LS-DYNA averages the force magnitude over the preceing output interval which results [...]

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