Forced Motions in Rectangular Elastic Waveguide

Abstract

Based on the superposition method, an analytic technique is developed for evaluation of the energy division among various modes in rectangular isotropic waveguide excited by loadings distributed on a portion of bounding faces. Results calculated for a square waveguide with uniform loading of constant magnitude are presented graphically. At each frequency there is more than one dominant mode. Backward modes are dominant for most feasible frequencies. Thus the loading considered is recommended for experimental investigations of these waves.