Title :
Wave propagation in strongly nonhomogeneous waveguide
Author :
Kondratenko, D.A.
Abstract :
Sukhanin (1992, 1994) revealed that the interaction of nonhomogeneities in a strongly non-uniform waveguide is a source of low-frequency waves. The wavelengths of the eigenwave oscillations may exceed the characteristic linear sizes of the structure. Suppose the nonhomogeneous media be a chain of heterogeneities and consist of two materials. Consideration of the oscillation interactions of adjacent heterogeneous media essentially changes the waveguiding and resonance properties and causes the occurrence of a set of low-frequency eigen-oscillations of the chain. To these oscillations there correspond some waves creeping along the nonhomogeneous chain. The heterogeneous poly-dispersity does not significantly affect the low-frequency eigen-oscillations of the chain. The low frequencies of the oscillations are determined by the linear concentration of the nonhomogeneities, the chain period and the oscillation phase shift
Keywords :
acoustic wave propagation; acoustic waveguides; eigenvalues and eigenfunctions; oscillations; waveguide theory; acoustic waveguide; adjacent heterogeneous media; chain period; characteristic linear sizes; eigen-oscillations; eigenwave oscillations; heterogeneities; heterogeneous poly-dispersity; linear concentration; low-frequency eigen-oscillations; low-frequency waves; nonhomogeneities; nonhomogeneous chain; nonhomogeneous media; nonuniform waveguide; oscillation interactions; oscillation phase shift; resonance properties; strongly nonhomogeneous waveguide; wave propagation; waveguiding properties; Acoustic materials; Acoustic propagation; Acoustic waveguides; Acoustic waves; Eigenvalues and eigenfunctions; Equations; Frequency; Hydrodynamics; Steady-state; Transmission line matrix methods;
Conference_Titel :
Mathematical Methods in Electromagnetic Theory, 1998. MMET 98. 1998 International Conference on
Conference_Location :
Kharkov
Print_ISBN :
0-7803-4360-3
DOI :
10.1109/MMET.1998.709907
