elastic support

[IlNanni]

I have to do a modal analysis of a tree with attached a rotor; I need to simulate the constraints that represent the bearings at two points of the shaft. I thought of simulating these constraints with some elastic support but I can't understand what value you have to insert rigidity, which is reported in n/mm^3. such value is called foundation stiffness. the guida riporta:
the elastic support is based on a foundation stiffness that you set in the details view, which is defined as the pressure required to produce a unit normal deflection of the foundationif someone has a suggestion thank you in advance.

 

[jaccio404]

Bye.
Then, if not erro it is a specific rigidity to the surface, in fact if you look well the unit of measurement is n/mm*mm^2. to understand what value you can put so: divide the value of stiffness to the area on which you will apply the bond. It should be right, but correct me if I'm wrong.

 

[IlNanni]

All right, thank you. At this point I just have to estimate the radial rigidity of a roller bearing in my case...maybe the skf catalog will help me.

 

[jaccio404]

If you know the exact materials and sizes you put little to make a static simulation to determine stiffness!