Flat Plate Vibration Analysis Experimental and Numerical Fillet Study

摘要

Measurements and predictions of low-order resonant frequencies and mode shapeshave been made for three rectangular aluminum plates, each having a different fillet radius at the attached end. Measurements were conducted using a dual-beam laser vibrometer, and predictions were made using the MSC/NASTRAN finite element code. The effects of the fillet radius on the resonant frequencies have been quantified, and a comparison between measured and predicted values is presented. Effects of water loading are also presented. Results show that 1) resonant frequencies increase as the filet radius increases, 2) the predicted resonant frequencies compare favorably with those measured, and 3) water loading reduces the resonant frequencies determined in air. Keywords: Plates; Resonance; Mode shape; Laser vibrometer; NASTRAN; Water loading; Dynamic responses; Physical properties; Structural properties. (kt)