creating cylindrical coordinate system and selecting nodes in an area within certain angular limits and applying pressure as an

Hi guys,

I am a PG student in Mechanical engineering and I am doing a project on automobile alloy wheel and I want to do structural analysis on it.

In the static analysis the pressure load is to be applied as cosine function on the bead seats of the rim through an angle of 80 degrees. So, first I have to create a cylindrical coordinate system and then nodes within the angular limits is to be selected. I don't know how to do it in Hypermesh.

I tried to export the model in Ansys. But I could not apply pressure load on the model imported from Hypermesh in Ansys.

Please help me..