Hydroacoustic Field of a Point Source in an Inhomogeneous Marine Medium Containing a Cylindrical Body Floating on the Surface

We study the problem of determination of the sound field of a point harmonic source in the coastal zone and the influence of a cylindrical body floating above the source on the sound field formed in the marine medium. A numerical-analytic method is proposed for the determination of the velocity potential. According to this method, the unknown coefficients in the general solution of the problem are determined from the corresponding infinite system of linear algebraic equations by the method of reduction. We present results of numerical calculations for a special case of a waveguide whose parameters are typical of the coastal part of the sea and perform the comparative analysis of the data obtained as a result of variation of the indicated parameters.     

Energy characteristics of the hydroacoustic field in a nonuniform marine medium with a cylindrical body floating on the surface

By using the hydroacoustic field generated by a point source in a nonuniform marine medium with a cylindrical body floating on the surface and determined as a solution of the corresponding problem by the method of partial domains, we study the energy characteristics of the near and far fields. The asymptotics capable of improving the accuracy of calculations is proposed for the analysis of the posed problem for an infinite system of linear algebraic equations. We also present some results of numerical calculations for some special cases and their comparative analysis in the case of variation of the parameters of a waveguide within the ranges typical of the coastal zone of the sea. __________ Translated from Morskoi Gidrofizicheskii Zhurnal, No. 3, pp. 52–59, May–June, 2006.