ASA 127th Meeting M.I.T. 1994 June 6-10

4pSAb7. Evaluating varying configurations of constrained layer damping on a plate using structural intensity.

Amy B. Spalding

J. Adin Mann, III

Aerosp. Eng. and Eng. Mech., Iowa State Univ., Ames, IA 50011

The use of structural intensity to evaluate patches of constrained layer damping attached to a vibrating plate will be discussed. Measurements with several aluminum plates were performed using various damping configurations. The plates were excited with a chirp signal (0--500 Hz) and results were analyzed between 0 and 500 Hz. Measurements were made before and after constrained layer damping material was applied to each plate. The damping configuration was varied on each plate to observe the affect of damping placement. Structural intensity for both the damped and undamped plates will be compared. Specifically, the torsional, bending, shearing, and total structural energy in the plates will be discussed. In addition, the energy absorbed by each damping configuration will be evaluated. [Work supported by NSF, MSS-9103377.]