Thank you, Loic. The paper I am trying to replicate can be found here: https://doi.org/10.1016/j.apor.2011.08.002
It examines waves impacting a plate in 2D using the SPH method. I am attempting to re-create it in 3D using either the ALE or S-ALE method. The model appears to be working well but the contact pressures are coming out 2-3 kPa to low.