Abstract:

The frequency response function at the free end of a cantilever beam attached to an irregularly shaped flat plate has been measured experimentally. Variations in the drive point accelerance due to changes in the boundary conditions of the plate are presented. The ensemble of frequency response functions shows some deterministic features (due to the modes of the beam) and some statistical features (due to the varying boundary conditions of the plate). A numerical model using a beam impedance element and a simply supported rectangular plate with the same area and thickness as the test plate gives results that are similar to the ensemble of test results.