dampers in transient mechanical simulation with pde toolbox

Hi all.

I would like to know if pde toolbox is able to help me in the following case.

I want to compute the transient time-response of a mechanical structure experiencing a displament at some of its boundaries.

My structure is composed of a (complex) 3D rigid-body structure, imported from STL file, and 3 identical dampers fixed beneath this structure.

Same boundary condition is applied to the bases of each one of the dampers, and it is a time-varying x translation conditon.

I know characteristics of the dampers in term of resonant frequency and damping coefficient (in 3D), and I would like to modelize them with those parameters. That is, I would like to put in my model 3 'dampers equivalent' instead of 3 'realistic' damper geometries and material properties (that I don't have).

I read in pde toolbox documentation that it is possible to apply 'TranslationalStiffness' load on surfaces or on edges. It looks appealing to me, but I don't really understand the concept of distributed stiffness on surface or edge.

Is it possible to use this 'TranslationalStiffness' on a surface to simulate a 3D damper-equivalent with a given resonant frequency and damping coefficient (in 3D)?

thanks