I am trying to figure out the best way to simulate a physical shaker test that we perform on our tooling

basically a 5-200 hz frequency is swept across the tool at an ampltude of 1G, any resonance of the tool above 2G is considerd a resonant point, I thought I was doing this correctly but I have a case where my results are not being duplictaed by the physical results

Anyone with any experience with this or ideas please advise