Depending on the influence of the inertia terms, this state is governed by a static or dynamic equilibrium in frequency domain. Due to continual reflecĀ tions at boundaries and propagation of waves in bounded solids after some time a steady state is reached. of waves - the compression wave similar to the In solids, there are two types pressure wave in fluids and, additionally, the shear wave. ![]() ![]() Thus, solely mechanical disturbances in contrast to electro-magnetic or acoustic disturbances are considered. From all wave types in nature, here, attention is focused only on waves in solids. These effects are familiar to everyone, e.g., transmission of sound in air, the spreading of ripples on a pond of water, or the transmission of radio waves. ![]() A description of wave propagation phenomena is given by Graff : The effect of a sharply applied, localized disturbance in a medium soon transmits or 'spreads' to other parts of the medium. Wave propagation is an important topic in engineering sciences, especially, in the field of solid mechanics.
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