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Ansys Learning Forum › Forums › Discuss Simulation › LS Dyna › Hydrostatic Equillibrium and material deformation in S-ALE FSI › Reply To: Hydrostatic Equillibrium and material deformation in S-ALE FSI

May 24, 2024 at 7:47 am
Abhemanyu Palaniswamy Chandrasekaran
Subscriber

Hi Ian,

I have tried running the original file with MPP version 14. I get the following

Could you please share an image of the hull deformation results that you obtain.

The material is modelled as steel with a thickness of 0.2m (20cm). The fluid is water and the fluid inside is an arbitrary fluid with half the density of water. In any case, such a thick hull cannot deform due to the fluid.

Similarly by only changing the material behaviour in the original file, changing the material for PART=5 (lagrange shell)  from ELASTIC to RIGID, the results are completely unrealistic.

In the original model, the node set of the lagrange part 5 (ship) is only constrained from moving out of plane. So Ideally the wave must be able to move the structure in the X and Y directions. Instead, the part remains fixed in space. Could you please explain if I am missing any details in this model.

Thanks & Regards

Abhemanyu