Numerical solutions of the Rayleigh-Plesset equation of gas bubble pulsations under slow increasing pressure amplitude of acoustic pump wave were thoroughly investigated. 3D diagrams of transformation of discrete spectrum of periodic pulsations in a continuous spectrum with broad spectral lines have been obtained. Dynamics of behavior of these broad lines and of conversion of continuous spectrum in a discrete one at the confluence of these broad lines has been investigated. Spectra that corresponded to almost periodic oscillations were detected and subharmonics under 1/8 were found.
47.52.+j Chaos in fluid dynamics
Department of Physics, St.Petersburg State University, St. Petersburg, St. Peterhof, 198504 Russia
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