Vibrations of Cross-Stiffened and Sandwich Plates with Application to Underwater Sound Radiators

Abstract

A simplified theory is presented for obtaining the frequencies, deflections, and stresses in cross stiffened and sandwich plates under dynamic loading. Formulas are derived giving the effect of the water on the natural frequency and the approximate Q of the plate. The application of resonant plates as underwater sound radiators is discussed, and procedures for designing such radiators are given.