Thanks, we are planning on correlating modal results in FEA. The plate I remember was just a flate plate with closely spaced modes. I believe it was a round robin exercise conduted by IES as GregLocock stated.
Our vib lab just purchased some modal software. I have lost the a resulsts of a modal analysis done on a plate published by the IES as a benchmark (probably ~15 years old). I was wondering if there was a relatively simple and cost effective benchmark we could use to verify and train people?
We use springs to represent the bolts in a joint. Using two coincident nodes, one belonging to one part and the second to the other part, create a 3-d spring (k1=E*A/l and k2=k3=G*A/l). This allows the bolts to more accurately share the load.