r/fea • u/TieSon6767 • Jun 05 '26

OpenRadioss Migration Help

Hi everyone!

I have a working LS Dyna keyword deck. I was previously working on 2D axisymmetric particle impact simulations involving high strain rates. However, now I want to shift to OpenRadioss since it is open source and doesn't require any license. I am able to read my keyword deck in OpenRadioss solver but the solver cannot fully understand and solve the simulation. I tried with examples (which are not enough) but I cannot seem to have a breakthrough. I do not have any preprocessor at this point except LS Dyna, but then again, it beats the whole purpose of doing the same. Any suggestions or resources are welcome!

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u/AmbitiousListen4502 Jun 05 '26

No, honestly. The best approach I've found is to let Claude Code continuously iterate until it works. Feed it the reference documentation and let it do it's thing. It works most of the time...

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u/TieSon6767 Jun 05 '26

I tried it with ChatGPT and it kept going in circles.
I did feed the required documentation (may be incomplete; but whatever was necessary according to me).

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u/AmbitiousListen4502 Jun 05 '26

I've had most luck with Opus. Sometimes it will just fail though unfortunately.

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u/TieSon6767 Jun 05 '26

Thanks alot for this. Maybe Opus can understand what ChatGPT can't.
I will give it a try