illustrate the finite element filling and dynamic pressures as the silo
diameters varies from 5-10-20 m. while the silo height is constant (16.0 m). In these models (Large diameter
silos), The dynamic pressure values envelope the finite element filling pressure in the all points especially in the
lower half of the silo height. However by increasing h/d ratio the filling pressure values envelope the dynamic
pressure values in the upper half of silo height. This means that in large diameter silos ( h/d=1-2(. The vibration
of granular material inside the silo part situated near the top surface plays an important role in these silos
responses.