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Wyświetlanie 1-15 z 80
Tytuł:
Modeling of the finite amplitude plane wave propagation in non-dissipative medium
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/331517.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
amplitude plane wave
Burgers equation
mathematical model
Opis:
The paper presents results of theoretical analysis of the finite amplitude plane wave propagation problem. The case of harmonic plane wave propagation in non-dissipative medium was considered. The mathematical model and some results of numerical investigations are presented. The mathematical model was built on the basis of one-dimensional continuity equation, equation of motion in differential form and state equation. The finite difference method was applied to solve the problem numerically. The pressure changes and harmonic pressure amplitude changes were analysed. The results of computer calculations were compared with solution of the Burgers equation.
Źródło:
Hydroacoustics; 2008, 11; 11-18
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical investigations of the beam pattern of the parametric acoustic arrays
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/331576.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The aim of this paper is theoretical analysis of the beam pattern of the parametric acoustie arrays. The procedure of the beam pattern calculation and an example of numerical caleulations were presented. Mathematieal model was built on the basis of the KZK equation. A circular transdueer was the source offinite amplitude waves.
Źródło:
Hydroacoustics; 2000, 3; 69-72
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical modeling of the nonlinear wave propagation in a bubble layer
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/331692.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The aim of the paper is a theoretical analysis of acoustic waves propagation through a bubble layer. The mathematical model of the pressure propagation in bubbly liquid layer is constructed by the linear non-dissipative wave and the Rayleigh-Plesset equations. The acoustic pressure field inside the layer, the reflected and transmitted waves, and suitable power spectral density are studied. Numerical analysis is carried out for different layer thicknesses, different values of physical parameters and generated signals. Some results of numerical investigations are also presented.
Źródło:
Hydroacoustics; 2011, 14; 9-16
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of the finite amplitude waves interaction problem inside truncated cone
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332087.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
amplitude waves
truncated cone
Opis:
The paper presents the results of theoretical investigations of the finite amplitude waves interaction in water. The mathematical model and some results of numerical investigations are presented. The acoustic pressure amplitude changes for different frequency waves (especially difference frequency wave) along the sound beam were investigated. The mathematical model was built on the basis of the KZK equation. It was assumed that a circular piston was the source of two different frequency finite amplitude waves. The problem was considered as an axial symmetric one. The solution of the problem was looked for inside a truncated cone. To solve the problem the finite-difference method was applied.
Źródło:
Hydroacoustics; 2003, 6; 131-136
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of discrete model parameters on the KZK equation solution using the finite difference method
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332604.pdf
Data publikacji:
1997
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
Khokhlov - Zabolotskaya - Kuznetsov (KZK) nonlinear parabolic wave equation describes the acoustic pressure changes in the nonlinear and dissipative medium along the sound beam. This equation is solving numerically. On the basis of the finite difference method computer programs have been worked out. These programs allow to conduct different numerical investigations. The paper presents a mathematical model of finite amplitude wave propagation problem. The results of numerical investigations refer to influence of discrete model parameters on accuracy of numerical calculations are studied.
Źródło:
Hydroacoustics; 1997, 1; 59-64
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigations of finite amplitude waves interaction in water
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332776.pdf
Data publikacji:
1999
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The aim of this paper is numerical analysis of the finite waves interaction in water. The mathematical model is built on the basis of Khokhlov-Zabolotskaya-Kuznetsov (KZK) equation. The problem is considered as an axial symmetric one. The finite-difference method has been used 10 solve the KZK equation. The paper presents the mathematical model and some results of numerical investigations of finite amplitude waves interaction. One shows the waveform and spectrum of the wave for fixed distances from the source, and (he pressure amplitude changes as a function of distance of different harmonic components.
Źródło:
Hydroacoustics; 1999, 2; 247-250
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical analysis of the finite amplitude waves interactionproblem for two types of piston
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/331806.pdf
Data publikacji:
2002
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The aim of the paper was the numerical investigations of the finite amplitude waves interaction in water. The problem was considered as an axial symmetric one. It was assumed that circular piston and ring-shaped piston were the source of two different frequency finite amplitude waves. The mathematical model was built on the basis of the Khokhlov - Zabolotskaya - Kuznetsov (KZK) equation. To solve the problem the finite-difference method was applied. The mathematical model and some results of numerical investigations are presented. The spectrum of the wave for fixed distances from the source, the pressure amplitude changes for different frequency waves as a function of distance from the source and pressure amplitude distribution for fixed distances from the piston were investigated.
Źródło:
Hydroacoustics; 2002, 5; 1-8
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pressure field in a plane layer
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/331904.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
acoustic waves propagation
acoustic waves
waves generation
Opis:
The paper presents results of analytical and numerical investigations of a plane acoustic waves propagation through a plane layer surrounded by another medium. The waves generation problem is discussed. The mathematical model of the pressure propagation in the layer is proposed. Propagated through the layer changes in pressure, the reflected and transmitted waves were studied. Some results of numerical investigations are presented.
Źródło:
Hydroacoustics; 2010, 13; 9-16
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pressure distribution and beam pattern of the parametric acoustic arrays
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332079.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The aim of this paper was analysis of the acoustic pressure distribution along sound beam and theoretical investigations of the beam pattern of the parametric acoustic arrays. The changes of pressure amplitude for different frequency waves along the sound beam were investigated. The mathematical model was built on the basis of the KZK equation. The problem was considered as an axial symmetric one. To solve the problem the finite-difference method was applied. The mathematical model and some results of numerical investigations are presented.
Źródło:
Hydroacoustics; 2004, 7; 1-6
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the finite amplitude plane wave propagation problem
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332213.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The paper presents the results of the theoretical investigations of the finite amplitude plane wave propagation problem. The case of harmonic plane pressure wave of megahertz frequency propagating in water is discussed. Mathematical model and some results of numerical calculations are shown. The nonlinear acoustics equation was considered to build the mathematical model. To solve the problem numerically the finite-difference method was applied. The influence of discrete model parameters on the numerical calculations accuracy was studied. The results of computer calculations for different values of physical parameters were also analyzed.
Źródło:
Hydroacoustics; 2006, 9; 1-8
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigations of the nonlinear waves generation in a bubble layer
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332403.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The purpose of the paper was to conduct numerical investigations of the nonlinear wave generation in a layer with uniformly distributed mono-size spherical bubbles. The mathematical model and examples of results of theoretical studies of this problem are presented. The mathematical model of the pressure propagation in the bubbly liquid layer is constructed using the linear non-dissipative wave and the Rayleigh-Plesset equations. The Commander and Prosperetti model is employed to compute the phase sound speed in the bubble layer. The spectra of transmitted and reflected waves are studied and the amplitudes of selected frequency harmonics of these waves examined.
Źródło:
Hydroacoustics; 2012, 15; 7-12
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Harmonic generation from a finite amplitude wave circular source
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332449.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The finite amplitude wave propagation problem for circular source was considered. The paper presents mathematical model and some results of theoretical investigations. The problem was considered as an axial symmetric one. The mathematical model was built on the basis of the Khokhlov – Zabolotskaya – Kuznetsov (KZK) equation. To solve this equation the Fourier series expansion and finite-difference method were applied. The pressure harmonic amplitudes as a function of distance form the source and waveform were examined. Influence of discrete model parameters on accuracy of numerical calculations was investigated.
Źródło:
Hydroacoustics; 2007, 10; 9-16
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of the acoustic waves propagation in non-homogeneous medium
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332534.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Akustyczne
Tematy:
acoustic waves
numerical investigations
KZK equation
Opis:
The aim of the paper is theoretical analysis of acoustic waves propagation in medium which are not homogeneous. The paper presents mathematical model and some results of numerical investigations. The mathematical model was built on the basis of the KZK equation. To solve the problem numerically the finite-difference method was applied. The on-axis pressure and power spectrum density were analysed both in homogeneous and non-homogeneous medium
Źródło:
Hydroacoustics; 2009, 12; 1-8
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the KZK equation solution for fixed pressure distributions at the piston
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/332768.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Akustyczne
Opis:
The paper presents the results of the numerical investigations of the finite amplitude waves interaction problem for circular piston with Gaussian pressure amplitude. The mathematical model and some results of numerical investigations are presented. The mathematical model was built on the basis on the Khokhlov – Zabolotskaya – Kuznetsov equation (KZK equation). To solve the problem the finite-difference method was applied. The on-axis pressure amplitude as a function of distance from the source for different frequency waves and their pressure amplitude distributions at horizontal section were investigated. The calculations were done for different values of source and medium parameters. The results of computer calculations were compared with analytical solutions of the KZK equation in special cases.
Źródło:
Hydroacoustics; 2005, 8; 1-9
1642-1817
Pojawia się w:
Hydroacoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical Studies of Nonlinear Generation Efficiency in a Bubble Layer
Autorzy:
Baranowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/176687.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
nonlinear acoustics
bubble layer
transmitted and reflected waves
Opis:
The aim of the paper is a theoretical analysis of propagation of high-intensity acoustic waves throughout a bubble layer. A simple model in the form of a layer with uniformly distributed mono-size spherical bubbles is considered. The mathematical model of the pressure wave’s propagation in a bubbly liquid layer is constructed using the linear non-dissipative wave equation and assuming that oscillations of a single bubble satisfy the Rayleigh-Plesset equation. The models of the phase sound speed, changes of resonant frequency of bubbles and damping coefficients in a bubbly liquid are compared and discussed. The relations between transmitted and reflected waves and their second harmonic amplitudes are analyzed. A numerical analysis is carried out for different environmental parameters such as layer thicknesses and values of the volume fraction as well as for different parameters of generated signals. Examples of results of the numerical modeling are presented.
Źródło:
Archives of Acoustics; 2012, 37, 3; 287-294
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 80

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