Learning Forum

[s347057]

I am trying to implement the ALE method for an analysis of a section of a hull impacting the water.

I managed to create the model and run the analysis.

I don't understand why there is such a significant loss of energy during impact. In similar models using the SPH method, I had a maximum loss of 10% of the initial energy, but in this model it is almost halved.

I have already tried using both SOLID and SHELL elements with different materials, ELASTIC, RIGID, COMPOSITE... but the result is always similar.

Currently, in the model, I have defined a water tank with EOS_GRUNEISEN and the upper air with MAT_VOID.

Is it normal for such a high loss to occur, or is it necessary to implement other KEYWORDS?

Thank you in advance.

 

 

 

 

[Nanda]

Hello User,

Could you try S-ALE? Our advanced solver compared to ALE.

Regards,

Nanda.

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[s347057]

I've haven't tried S-ALE yet. Is there any documentation or tutorial about it?

I've tried to search something about it but I've found just a few paper about it without any indication of KEYWORDS

Thank you

[Nanda]

Hello User,

I found one example here: Adiabatic Expansion — Welcome to LS-DYNA Examples

And a bunch of tutorials and conference papers here: Introduction to Structured ALE | Livermore Software Technology Corp.

To get a detailed understanding on the keywords used, please refer to the latest manual here: Index

Best,

Nanda

 

[s347057]

Is there another model? I tryed to run that one but I get error in LS-Run window without modify anything

[Nanda]

Hello User,

We have 40+ examples in the above link I shared. I'm sharing again for your reference: Index

Best,

Nanda