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Increasing significant digits in nodout

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Posts: 4
Topic starter
(@ironam)
Barista
Joined: 1 year ago

Dear forum,

is there a way to increase the number of significant digit in the DATABASE_NODOUT or other cart?

Thanks and greetings

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Posts: 61
(@icebreakersours)
Lab Tech
Joined: 2 years ago

@ironam Could you provide some context?

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1 Reply
(@ironam)
Joined: 1 year ago

Barista
Posts: 4

hi @icebreakersours,

im writing a program for an optimisation, which uses lsdyna for the calculation. Im using the Nodout option to get the coordinates and displacement of the nodes and use them further. But in the ascii file are only 6 significant digits written. Is there a way to increase the amound of significant digits, to get a higher precision in my follow up calculation?

Kind regards

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Posts: 61
(@icebreakersours)
Lab Tech
Joined: 2 years ago

@ironam

I do not have a ready answer. However, I have a comment that might be food for thought: How many inputs do you have going into the model? What is the uncertainty in your inputs? As you know full well, the model itself is a highly idealized representation of the reality. Once you consider these aspects, 6 significant digits might be more than adequate.

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Posts: 22
(@rybask1)
Paid Intern
Joined: 2 years ago

In my experience, there are more significant digits when the data is exported/saved (to a .csv, for example) than what is shown in the ASCII plots. It seems like LSPP may round the data to declutter the plots. 

 

My elout data in my most recent simulations reads ' 5.1223385526e-05', while the ASCII data in LS-PrePost shows only 6 digits, like you indicated. I hope this helps!

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1 Reply
(@ironam)
Joined: 1 year ago

Barista
Posts: 4

Hi @rybask1,

thanks, we will try that.

Our workaround was also to use the binary 3dplot output. But it would have been nice, if there was a option for the ASCII output.

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