Learning Forum

[jtowns03]

I am wondering what controls how many states are packed into each d3plot file in LS-DYNA, and whether model complexity can affect this.

I'm running two simulations of similar brain models, one of which is standard and the other with embedded beam elements representing axons. Both have identical *DATABASE_BINARY_D3PLOT settings (dt = 0.3125 ms), identical termination times (50 ms), and identical *DATABASE_EXTENT_BINARY settings including BEAMIP=4 and IEVERP=0. Based on the d3hsp logs, both simulations wrote 161 states during the run and both completed normally.

However, on disk the simpler model has 41 d3plot files while the complex axon model has 161. Since the d3hsp confirms the same number of write events in both, it seems like LS-DYNA is packing more states per file in the simpler model (roughly 4 states per file vs 1). I haven't used any load curves to prescribe output intervals and the packing behavior doesn't seem to be controlled by anything obvious in the keywords I've checked. Ultimately, I would like to reduce the number of d3plot files in the complex model to match the simpler one in a controlled manner. Is there some keyword or setting that controls states-per-file packing that I might be missing?

[Ram Gopisetti]

Hi, 

Perhaps, you can check the information in this link https://innovationspace.ansys.com/forum/forums/topic/how-to-overwrite-max-number-of-files-limit-in-ls-dyna/

Cheers, Ram

[jtowns03]

This worked perfectly, thanks so much!