Title :
High frequency quasi-normal waves for nonstationary near-surface waveguide
Author_Institution :
Dept. Math. Phys., St. Petersburg Univ., Russia
Abstract :
The propagation of nonharmonic acoustic waves in an ocean refractive waveguide with slowly varying properties in horizontal directions and time is discussed. The waveguide is modulated as a water layer with plane boundaries. The wavelength is assumed to be small in comparison with the width of the layer. A set of asymptotic solutions of the wave equation called as quasi-normal waves and nonstationary eikonal equation are constructed.
Keywords :
acoustic waveguides; oceanography; underwater acoustic propagation; waveguide theory; anharmonic acoustic waves; asymptotic solutions; high frequency quasi-normal waves; nonstationary eikonal equation; nonstationary near-surface waveguide; ocean refractive waveguide; propagation; slowly varying properties; water layer; wave equation; wavelength; Acoustic diffraction; Acoustic propagation; Acoustic refraction; Acoustic waveguides; Acoustic waves; Frequency; Laplace equations; Oceans; Partial differential equations; Planar waveguides;
Conference_Titel :
Day on Diffraction, 2002. Proceedings. International Seminar
Print_ISBN :
5-7997-0469-X
DOI :
10.1109/DD.2002.1177890
