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

2pSA7. Mid-frequency endcap reflection and radiation coefficient extraction from FEM data.

P. W. Smith, Jr.

Kevin D. LePage

J. Gregory McDaniel

Gregory L. Duckworth

Robert J. Barile

Bolt Beranek and Newman, Inc., 70 Fawcett St., Cambridge, MA 02138

The response of a simple cylindrical shell terminated by rigid endcaps to various axisymmetric mechanical excitations is determined using the SARA 2-D finite element code. By assuming that the response of the shell is primarily composed of structural waves, which satisfy the fluid-loaded shell equations, the structural wave reflection matrix of the endcap is determined through an over-constrained system of equations. Results for the frequency range, 2