- Name: Mikhail Averiyanov
Place of work: PhD student, Department of Acoustics, Faculty of Physics, Moscow State University,
Date of birth: 27.03.1983
Research title: Propagation of nonlinear acoustic signals through inhomogeneous moving media
Propagation of nonlinear waves in media with random scalar and vectorial inhomogeneities has been studied. A novel nonlinear parabolic equation has been derived that accounts for the vector-type disturbances and governs diffusion of the acoustic field by the random flow inhomogeneities. Numerical algorithm has been developed to investigate nonlinear propagation of acoustic signals of different temporal shape. It has been shown that the transverse component of the velocity field has a strong influence on the acoustic field structure. Nonlinear propagation resulted in tighter focusing and change of the peak pressure in caustics (regions with increased sound pressure level). To estimate the effect of diffraction the results of modelling have been compared to the solutions to the eikonal equation (geometrical acoustics). It has been shown that formation of the caustics is not correctly described by geometrical acoustics even for large scale single inhomogeneities. Moreover the results obtained based on parabolic equation showed additional regions of focusing and defocusing due to diffraction effects.
- M.V. Averiyanov, M.S. Basova, and V.A. Khokhlova. Stationary and quasi-stationary solutions of the Burgers-type equations. Acoustical Physics 2005, Vol.51(5), pp.581-588
- Vedernikov, A. Morozov, M. Averiyanov, V. Khokhlova, V. Andreev. Indirect temperature measurements in a focal zone of ultrasonic transducer. In: Proc.of 3rd International Symposium on Therapeutic Ultrasound (June 22-25, 2003, Lyon, France), eds. J.-Y. Chapelon and C.Lafon, pp. 217-223.
- M.V. Averiyanov, M.S. Basova, and V.A. Khokhlova. Stationary and quasi-stationary solutions of the Burgers-type equations. Proc. of the Joint Congress CFA/DAGA'04, March, 22-25, 2004, Strasbourg, France, V.1, pp. 547-548.
- P. Blanc-Benon, V.A. Khokhlova, M.V. Averiyanov, L. Dallois, R.O. Cleveland Propagation of nonlinear acoustic signals through inhomogeneous moving Media, Proc. of the Joint Congress CFA/DAGA'04, March, 22-25, 2004, Strasbourg, France, V.2, pp. 1059-1060.
- M.V. Averiyanov, P. Blanc-Benon, V.A. Khokhlova and R.O. Cleveland Diffraction of Nonlinear Acoustic Waves in Inhomogeneous Moving Media. Proceedings of the Forum Acusticum, 2005, pp.1403-1408
- M.V. Averiyanov, M.S. Basova, and V.A. Khokhlova. Stationary and quasi-stationary solutions of the Burgers-type equations. XIIth Scientific School "Nonlinear waves - 2004" thesis (29 February - 7 March 2004, Nizhniy Novgorod, Russia), p.11.
- M.V. Averiyanov, and V.A. Khokhlova. Propagation of nonlinear acoustic signals through inhomogeneous moving media. Oral presentation on Russian Scientific School "Wave processes in inhomogeneous media", Zvenigorod, Moscow region, Russia, 24-29 May, 2004.
- M.S. Basova, M.V. Averiyanov, V.A. Khokhlova. The effect of frequency dependent absorbtion on propagation of nonlinear acoustic waves with shocks, International conference "Lomonosov-2004", book of abstracts, section "physics", p.25, 2004.
- Name: Galina Bukhlova
Place of work:: Institute of monitoring of climatic and ecological systems of the SB RAS.
Date of birth: 10.10.1976
Research title: Research of turbulent parameters in the near-ground layer of the atmosphere by ultrasonic devices.
On the basis of used of ultrasonic devices were carried out the research of turbulent structure of the near-ground layer of the atmosphere, of spatial-temporary correlation's depending on the temperature stratification, altitude dependence of structural constant refraction and structure constant acoustic refractive index and also definition of turbulent the flows of heat, pulse, scales of a temperature, wind and other characteristics of the turbulence.The purpose of the work is also attempt to reveal on the basis of comparisons measured by ultrasonic sensors and calculated, with the help of of special program, values of turbulent the flows of heat and pulse, universal functions providing of the best aptitude of the theory Monin-Obukhov, and retrieval of high-altitude profiles of meteorological and turbulent parameters obtained by various ultrasonic sensors. All this is considered as applied to a problem of the near-ground propagation of sound waves in the atmosphere. The propagation distance of sound waves (audibility and intelligibility of speech) from the same source is differently depending on from existing meteorological conditions that determing the condition of propagation of sound in the near-ground atmosphere. Therefore, on the basis of studies of the given problem and creation of the model of the near-ground propagation of sound waves in the atmosphere, are estimated existingmeteorological conditions. The results theoretical, hardware-controlled, experimental researches and developments on the given problem are studied. The analysis of influence of the various meteorological factors afecting to propagation distance of sound waves carry out. The results of tests in situ are investigated.
Buhlova G.V., Krasnenko N.P., and Stafeev P.G. Monitoring of the Turbulence in the Near-Ground Layer of the Atmosphere. Proceedings of the 11th International Symposium on Acoustic Remote Sensing and Associated Techniques of the Atmosphere and Oceans, Rome, Italy, 2002, p. 357-360.
Buhlova G.V., Krasnenko N.P., and Stafeev P.G. Monitoring of the turbulence in the near-ground layer of the atmosphere. Proceedings of SPIE Vol. 4678, p. 431-438 (2002).
Bukhlova G.V., Krasnenko N.P., Stafeev P.G. Retrieval of meteorological parameter profiles from the data of ultrasonic measurements in the near-ground atmospheric layer. Proceedings (Addendum) of the 12th International Symposium on Acoustic Remote Sensing and Associated Techniques of the Atmosphere and Oceans, Cambridge, UK . 2004, p. 11-13.
Bukhlova G.V., Krasnenko N.P., Stafeev P. G. Retrieval of meteorological parameter profiles from the data of ultrasonic measurements in the near-ground atmospheric layer. In the Proceedings of the XV Session of the Russian Acoustical Society. Nizhny Novgorod,November 15-18, 2004, p.321-323. N.N. Andreev Acoustics Institute, Moscow.
Krasnenko N.P., Abramochkin V.N., Bukhlova G.V., Druzhin O.V., Egorov A.N., Ivanova A.Yu., Kushner A.A., Mananko E.E., Sokolov Yu.M., Stafeev P.G., and Fomichev A.A. Sound broadcasting in the near-ground atmosphere and its prediction. In the Proceedings of the XV Session of the Russian Acoustical Society. Nizhny Novgorod,November 15-18, 2004, p.324-327. N.N. Andreev Acoustics Institute, Moscow.
- Name: Mikhail Kovalevsky
Place of work: Geological Institute Kola Science Centre Russian Academy of Sciences.
Date of birth: 03.10.1975.
Research title: Improvement of the acoustopolarization method for determination of elastic characteristics of anisotropic mediums.
Technical part. The design of acoustopolariscope with an automatic rotary drive of the rotating platform has been developed. The working procedure of the acoustopolariscope is described. In an atomized soft-hardware complex is used a controller. A controller is used for the data transmission to the parallel input/output port of a personal computer in the real mode of time. The controller is connected to the internal circuit of the UD2-12 defectoscope and is built in its case. A complete sequence of acoustopolarization measurements is described. New software Acoustpol has been developed. It is meant for processing the acoustopolarization measurement results. New possibilities of the program operation and its distinctive features as compared with the previous software product are shown. The program is linked to the controller of the data input in the parallel port of the computer.
Research part. The research was performed with the automated soft-hardware complex Acoustpol. Below are the results of investigation of elastic-anisotropic properties for 13 core samples from the KTB German Superdeep Well. The study of rock samples from the KTB Superdeep Well in the 4.1-7.1 km depth range showed that they are all elastic anisotropic and pertain to the orthorhombic symmetry type. In all samples the following effects were exhibited to a variable degree: elastic anisotropy, the LAAA effect, the phenomenon of angular unconformity, shear wave depolarization (DSW), micro cracks, and heterogeneity. A distinct correlation between the anisotropy factors and indexes is observed. Besides, a reverse correlation between density and anisotropy characteristics of the samples is seen. A preliminary investigation of elastic properties of the core samples from the Kola (SG-3) and German (KTB) superdeep wells was conducted. The interval of samples was from 4.1 to 5.3 km. All the studied core samples from both KTB and SG-3 showed elastic anisotropy. The samples from SG-3 have considerably higher parameters of elastic anisotropy, than those from KTB. The result of this work is the assertion that a high degree of rock elastic anisotropy is an indication of decrease in its strength. This can result in the loss of the borehole stability.
Kovalevsky Ì.V., Golovataya O.S., Gorbatsevich F.F. Automatic acoustopolariscope for measuring elastic and nonelastic parameters of solid mediums // Proceedings of XI Session of the Russian Acoustic Society.- Moscow: Geos, 2001.- v.2.- P.117-121.
Kovalevsky Ì.V. To a question of perfection a research technique of elastic characteristics of geomaterials by the acoustopolariscopy method // Information Materials of 12-th Scientific Conference: Structure, substance, history of a lithosphere of a Timano-Severouralsky segment.- Syktyvkar: Geoprint, 2003.- P.123-125.
Kovalevsky M.V., Lebedev S.A., Kim S.V., Kochetova L.B. et al. Archive System "Alee Software" is a tool of geophysical information system (for example of German KTB Superdeep Well) // Information Materials of 12-th Scientific Conference: Structure, substance, history of a lithosphere of a Timano-Severouralsky segment.- Syktyvkar: Geoprint, 2004.- P.81-84.
Kovalevsky M.V., Lebedev S.A., Kim S.V., Kochetova L.B. et al. Archive System "Alee Software" is a tool of geophysical information system (for example of German KTB Superdeep Well) // The Collection of Scientific Materials of 6-th Ural Youth Scientific Geophysical School. - Perm: Institute of Mines of UR of RAS, 2005.-P.96-100.
Kovalevsky M.V., Harms U. and Dahlheim H.-A. Ultrasonic polarization measurements of elastic-anisotropic properties of metamorphized rocks on the slit of the German KTB Superdeep Well in the 4100-7100 m depth range // Physical Acoustics. Propagation and diffraction of waves. Geological acoustics. Proceedings of XVI Session of the Russian Acoustic Society. - Moscow: Geos, 2005.- v.1.- P.291-296.
Kovalevsky M.V., Lebedev S.A., Kim S.V., Kochetova L.B., Krilov A.U. A tool of geophysical information system - Archive System "Alee Software"// Physical Acoustics. Propagation and diffraction of waves. Geological acoustics. Proceedings of XVI Session of the Russian Acoustic Society. - Moscow: Geos, 2005.- v.1.- P.296-301.
Kovalevsky Ì.V., Ilchenko V.L., Golovataya O.S. The study results of elastic anisotropy rock samples of the Kola and German superdeep Wells in the 4-5 km depth range // The Collection of materials XVI Youth Scientific Conference. Geology and Geoecology: Researches Young.- Apatity, 2005.- P.23-27.
- Name: Vitaly Matsuga
Place of work: Rostov State University
Date of birth: 07.03.1979
Research title: On calculation of the acoustic field generated by high-speed turbulent streams of a viscous fluid in narrow channels
In the present work we study possibilities of an asymptotic linearized prediction of the
turbulent component of the velocity field in a homogeneous flow for high Reynolds numbers. In frames of a plane problem we apply the linearization ideas for the Navier-Stockes equations of the viscous flow written in terms of stream function, based on smallness of the turbulent oscillations with respect to the mean flow. The structure of the mean flow is not known a priori, and it should be determined during the solution procedure. We however imply that the fluid consumption is known, that defines the averaged mean velocity. For simplicity, the unknown cross-function of the mean velocity is approximated by a polyline, and is considered, for the sake of brevity, to be of a symmetric form with respect to the channel axis. Then we apply to the arising partial linear differential equation the Laplace integral transform along time. The solution to the considered linearized boundary value problem is constructed asymptotically for high Reynolds numbers, with the use of the WKB method, separately in the "middle" and "boundary layer" zones. The so-formulated linear problem contains the unknown function of the mean flow. Then we join solutions constructed in the two different zones, and discover a numerable set of regimes, where there can exist oscillating undamped in time solutions. After that the so-obtained oscillating solution is substituted into the averaged Reynolds equations, that allows us to define the width of the boundary layer, which is present in all equations a certain unknown quantity. This approach gives a way to analytic representation of the sound field generated by the homogeneous turbulent stream.
- Sumbatyan M.A., Matsuga V.V. On calculation of
sound field in a homogeneous turbulent stream // Proc. IX Intern. Conf. "Modern problems in continuum mechanics", Rostov-on-Don, 2005.
Sumbatyan M.A., Matsuga V.V. An asymptotic approach to calculation of oscillating components of the velocity field in the turbulent flow for high Reynolds numbers // Proc. XVI session of the Russian Acoust. Soc., v.3, Moscow: GEOS, 2005, p. 226-229.
Matsuga V.V., Sumbatyan M.A.. On the structure of sound field of a high-speed turbulent flow of a viscous fluid in the narrow channel // Bulletin DGTU 2005. V.5. No. 4, p. 498-506.
- Name: Evgeny Podyatchev
Place of work: Moscow Engineering Physics Institute (State University)
Date of birth: 31.08.1980
Research title: Determination of attenuation coefficients of surface waves propagated along a borehole due to their scattering on the well roughness.
The goal of developing work was finding and analysis of attenuation coefficients of Stoneley wave and higher modes, propagated along a borehole with rough wall due to their scattering on the well roughness. And also the other goal was to solve similar problem of attenuation of eigen modes in a pipe with rough inner wall.
The problem was solved in framework of small perturbation approximation and with use of the mean field approach technique.
For the cases of fluid-filled borehole and fluid-filled pipe the dispersion equations describing propagation of eigen modes along rough surface of the borehole or the pipe were derived. The corrections to their wave numbers appearing due to scattering on boundary roughness were defined. The real and imaginary parts of these corrections describe the dispersion and attenuation of waves correspondingly.
It was shown that the total attenuation coefficient could be written as a sum of partial attnuation factors determined by scattering into secondary eigen modes and scattering of eigen modes into bulk waves (only for the case of borehole). The calculations of partial attenuation factors for different correlation lengths and for several types of correlation functions have been made.
As a result it has been received that the scattering of eigen mode into the eigen mode of the same type gives the main contribution to attenuation with increasing of correlation length. At that the form of attenuation factor are defined by dispersion characteristics of the problem and doesn't depend on form of correlation function. At small correlation lengths the main contribution comes from scattering of eigen mode backward into itself and other eigen modes and attenuation is defined by the form of correlation function. At that contributions of scattering of eigen mode forward into other eigen modes and bulk waves (only for the case of borehole) stay significant at high frequencies.
It is nessesary to note that estimation of given results for the borehole case demonstrates that the value of attenuation coefficient connected with scattering is comparable with the data on attenuation of eigen modes due to fluid flow between borehole and porous surrounding medium.
Also the results obtaned in this work can be used to develop methods for remote determination of the boundary conditions in fluid-filled pipes from the data on the attenuation of the eigen modes. As the behavior of the attenuation coefficient of individual modes can be used to reconstruct the parameters of the correlation function of the roughness on the inner surface of the pipe or the borehole.
Maximov G.A. Podyachev E.V., Ortega E. Attenuation of Stoneley wave in fluid-filled borehole due to its scattering on two-dimensional statistically rough well surface. CD "Proc. of the Tenth International Congress on Sound and Vibration," Stockholm, Sweden, 7-10 July 2003. Published by International Institute of Acoustics and Vibration. V.4, P-148, p.1945-1951.
Maximov G.A. Podyachev E.V., Ortega E. Attenuation of Stoneley wave in fluid-filled borehole due to its scattering on two-dimensional statistically rough well surface. Proc. XIII sesion of Russian Acoustic Society. V.1. 25-29 August 2003., pp. 245-248.
Maximov G.A. Podyachev E.V., Ortega E. Analysis of parametrical dependencies of Stoneley wave attenuation in fluid-filled borehole due to its scattering on rough well surface. CD "Proc. of the Eleventh International Congress on Sound and Vibration," St. Petersburg, Russia, 5-8 July 2004. Published by International Institute of Acoustics and Vibration. p.2801-2808.
Maximov G.A., Ortega E., Podyachev E.V., Chillemi M.R. Rayleigh wave attenuation due to the scattering by two-dimensional irregularities of the walls of an empty borehole. Acoustical Physics, Vol.50, No.5, pp.585-595.
Maximov G.A., Pod'yachev E.V., Horoshenkov K.V. Attenuation and scattering of axisymmetric eigen-modes in a fluid-filled pipe with internally rough walls. Proc. XVI sesion of Russian Acoustic Society. V.1. 14-18 November 2005., pp. 205-209.
Maximov G.A., Ortega E., Pod'yachev E.V. Attenuation of Rayleigh wave in empty borehole due to its scattering on three-dimensional statistically rough well surface. Proc. XVI sesion of Russian Acoustic Society. V.1. 14-18 November 2005., pp. 318-321.
- Name: Nataliya Polikarpova
Place of work: M.V.Lomonosov Moscow State University,
Department of Physics,
Oscillation Physics Division
Date of birth: 23.10.1981
Research title: Close to back reflection of acoustic waves in strongly anisotropic crystalline compounds of tellurium and mercury.
The phenomenon of a backward reflection of plane elastic waves in materials possessing extremely strong anisotropy of elastic properties has been examined. Crystalline compounds of mercury and tellurium may are the sounding examples of such materials. It has been shown that the effect of a backward acoustic energy reflection from a free surface separating the crystal and the vacuum may be observed in these crystals. Moreover, it has been found that the reflection in the crystals takes place in such a manner that the elastic energy flow of a backward wave propagates practically towards the energy of the incident wave.
It turned out that the group velocity of the backward wave is directed exactly in the opposite direction with respect to the group velocity of the incident wave while the angle between the incident and the reflected beam is equal to zero. At the same time, the fraction of energy in the backward wave may be equal to one hundred percent. It should be noted that the backward reflection exists both in the case of the glancing incidence of the acoustic waves and also in the case of inclined incidence. The examined phenomena help us to make general conclusions and better understand the new effect. Furthermore, a comparative analysis of the new anisotropic materials in comparison with the well known crystals has been carried out. It was shown that, in the elastic media with a moderate anisotropy, the observed effect is negligibly weak. There is no doubt that the unusual behavior of the elastic waves during the reflection from a boundary may be utilized in design and development of new acousto-optic and acousto-electronic devices.
- N.V.Polikarpova and V.B.Voloshinov "Elastic Properties of Anisotropic Acousto-Optic Crystals Tellurium Dioxide and Calomel", Proc. of EFTF'02 16-th European Frequency
and Time Forum, St.-Petersburg, Russia, p. C-134 - C-137, 2002.
N.V.Polikarpova and V.B.Voloshinov "Application of Acousto-Optic Interactions in Anisotropic Media for Control of Light Radiation", Acustica-Acta Acustica, v. 89,
p. 930-935, 2003.
N.V.Polikarpova and V.B.Voloshinov "Collinear Tunable Acousto-Optic Filters Applying Acoustically Anisotropic Material Tellurium Dioxide", Journal of Molecular and
Quantum Acoustics, v. 24, p.225-235, 2003.
N.V.Polikarpova and V.B.Voloshinov "Bulk Acoustic Waves Backward Reflection in Acousto-Optic Materials Paratellurite and Calomel", in Nonlinear Acoustics at the Beginning of the 21-th Century, ed. by O.V.Rudenko, Moscow State Univ., Moscow, Russia, v.2, p. 889-892, 2002.
- N.V.Polikarpova and V.B.Voloshinov "Reflection of Plane Elastic Waves in Acousto-Optic Crystal Tellurium Dioxide", Proc. 5-th World Congress on Ultrasonics WCU 2003, Paris,
France, p. 9-12, 2003.
- E.Blomme, V.Voloshinov, N.Polikarpova and A.Tchernyatin "Intermediate Regime of Light Diffraction in Crystals with Strong Elastic Anisotropy", Proc. 5-th World Congress
on Ultrasonics WCU 2003, Paris, France, p. 333-336, 2003.
Nataliya.V. Polikarpova and Vitaly. B.Voloshinov "Intensity of reflected acoustic waves in acousto-optic crystal tellurium dioxide", Proc. SPIE, v. 5828, pp. 25-36, 2004.
V. B. Voloshinov, O.Yu. Makarov and N.V. Polikarpova, "Nearly Backward Reflection of Elastic Waves in an Acousto-Optic Crystal of Paratellurite", Tech. Phys. Lett., 31, N 4, pp. 352-355, 2005.
Nataliya V. Polikarpova, Vitaly B. Voloshinov "Glancing incidence and back reflection of elastic waves in tetragonal crystals", Proc. SPIE, v. 5953, pp. 95-106, 2005.
Alexey V. Zakharov, Nataliya V. Polikarpova, Erik Blomme "Intermediate regime of light diffraction in media with strong elastic anisotropy", Proc. SPIE, v. 5953, pp. 107-116,
- Name: Andrei Teplykh
Place of work:Institute of Radio Engineering and Electronics, RAS,
Date of birth: 09.08.1981
Research title: Energy characteristics of acoustic waves in
piezoelectric materials and structures
The energy characteristics of various types of plane acoustic waves
propagating in different directions of such piezoelectric materials as
lithium niobate, lithium tantalate, quartz, zinc oxide, and potassium
niobate have been theoretically investigated. As a result of this
investigation the following new regularities have been found: the
mechanoelectrical and electromechanical energies always compensate each
other, but in general case their power flow is not equal zero; the
electrical power flow is always opposite to propagation direction of wave;
the instant energy density of electric field in vacuum generated by
piezoactive inhomogeneous acoustic wave is constant in time. At that the
ratio of the total power flow to the total wave energy gives the energy
transport velocity, which always coincides with the group velocity. It was
shown that at traditional approach the density of the instant total energy
of acoustic wave is not the integral of motion. It was suggested the new
approach for definition of potential wave energy, for which the instant
total energy of all types of plane waves does not depend on time. It was
shown that the angle between the phase velocity and energy transport
velocity of the plate waves depends on electrical boundary conditions and
the change of this angle in lithium niobate may achieve 15 degree due to
electrical shorting the surface. This fact opens the wide prospects for
development of acoustic modulators and switches. The hybridization effect of
acoustic waves in piezoelectric plates was investigated and it was shown
that in general case the hybridization appears due to electrical or
mechanical coupling between waves for condition of spatial and time
synchronism. At that the coupled waves constantly exchange by energy. It was
suggested the quantitative criterion of the hybridization degree as the
portion of mutual mechanical or electrical energy relatively to their sum
I.E.Kuznetsova, B.D.Zaitsev, I.A.Borodina, A.A.Teplykh
The peculiarities of propagation of acoustic waves of zero and higher orders in piezoelectric plates // Proc. XVI sesion of Russian Acoustic Society. V.1. 14-18 November 2005., pp. 316-319.
B.D.Zaitsev, I.E.Kuznetsova, A.A.Teplykh
The peculiarities of energy characteristics of acoustic waves in piezoelectric materials and structures //
Proc. XVI sesion of Russian Acoustic Society. V.1. 14-18 November 2005., pp. 320-323.
Zaitsev B.D., Kuznetsova I.E., Teplykh A.A. The Peculiarities of
Energy Characteristics of Acoustic Waves in Piezoelectric Materials and
Structures. WCU/UI'05, 28 Aug. - 1 Sept., 2005, Beijing, China. Program and