Disclaimer: I have not looked (yet) in your parameters, I am just trying to give directions to multiple questions in the forum first.
In the preCICE tutorials, we use deal.II instead of CalculiX. The case is described and validated in OpenFOAM-preCICE: Coupling OpenFOAM with External Solvers for Multi-Physics Simulations | OpenFOAM® Journal
Besides parameters, you also need to look at space and time discretization schemes.
For CalculiX, you could also compare to the FSI2 example contributed here: Turek-Hron FSI 2 Benchmark