validation

In order to determine vibration transmissibilty charecteristic of 3d printed material this experimental system was designed by me. I performed tests for

I performed experimental test and I would like to obtain same results numerically

my sistem consists of a traditional honeycomb made from Polyproplyene produced by FDM technology, a rigid mass of 1 kg was placed on the honeycomb specimen a one-axis accelerometer was placed the rigid mass and shaker table

I think there are a problem in boundary conditions

 is there any suggestion?