deformation of a clamped circular plate

Hi all, 
I need help to calculate the deformation of a circular plate(d=200mm and t=10mm) with a hole (d=20mm and t=5mm) at a center. The plate is clamped at its edge and subjected to 275KPa uniformly distributed load at the face without the hole.

I want to study the variation of maximum deformation with the  varying depth of the central hole. Any ideas on how I should approach this problem?