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Nonlinear decay of random waves described by an integrodifferential equation
Sergey N Gurbatov1, Oleg V Rudenko2
1Lobachevsky State University of Nizhni Novgorod, 23 Gagarin Ave., Nizhni Novgorod 603950, Russia.
Abstract:
The evolution of random nonlinear waves (high-intensity noise) in a dissipative and dispersive media is studied. To describe wave processes, the mathematical model in the form of a nonlinear integrodifferential equation is used. The concrete integrand kernels are determined by both frequency-dependent absorption and velocity of the wave. The nonlinear energy loss of broadband noise is considered in two limiting cases: (i) at the initial stage of propagation, when the wave profile contains a small number of shock fronts, and (ii) at the later stage when the wave reshapes to a sawtoothlike one with randomly located shocks.
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