Hello OCY,

Acoustic waves travel by compression and decompression of the pressure of the fluid in the direction the wave is traveling.

A long plate of solid material can be excited to generate a compression longitudinal wave along the length of the material, similar to an acoustic wave, but solids can also carry shear waves that are lateral displacements of material as the wave passes. These lateral shear waves have lower wave speeds than the longitudinal compression waves.

The analysis system to visualize a single wave (either compression or shear) traveling along the length of a solid plate is Transient Structural. Here is a discussion.

You are interested in the steady state condition of a structure subject to a constant oscillation force (or displacement), so use a Harmonic Response analysis. In that analysis, any applied force (or displacement) is assumed to be the amplitude of a sinusoidal force (or displacement). The results assume a sinusoidal response and you can plot the amplitude of displacement or stress. This analysis is done over a range of input frequencies. Therefore, you can plot how the response of a point on the model changes as the input frequency sweeps from low to high values of the frequency range requested.