Autor: Piddubniak, N. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Sound Radiation from a Roundabout
Autorzy:: Piddubniak, O.
Piddubniak, N.
Powiązania:: https://bibliotekanauki.pl/articles/177962.pdf
Data publikacji:: 2010
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: roundabout
car sound radiation
stationary phase method
acoustic pressure
power flow density
Opis:: Sound propagation from the vehicles moving on the city roundabout, with taking into account the wind is investigated. Solution of the problem for one moving sound source is found by means of the integral Fourier transforms extended over space variables and time. Inverse transforms are calculated approximately, using a stationary phase method and iterative technique. The solution for a general problem is obtained as a superposition of many partial solutions. The numerical analysis of noise characteristics is performed for the three-way Korfanty roundabout case in Łódz.
Źródło:: Archives of Acoustics; 2010, 35, 3; 437-456
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Mathematical Modelling of Sound Radiation from a T Junction of City Roads in Windy Conditions
Autorzy:: Piddubniak, O.
Piddubniak, N.
Powiązania:: https://bibliotekanauki.pl/articles/176734.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: T junction of city roads
traffic noise propagation
stationary phase method
acoustic pressure
power flow density
Opis:: The sound radiation from vehicles travelling on the city roads with T junction was considered. The wind effect on acoustic field was taken into account. The solution of this problem was found with the help of the integral Fourier transforms and stationary phase method as the superposition of solutions for the cases of vehicles moving along the straight roads and roads with right-angle bend. As an example, the numerical analysis of traffic noise characteristics was carried out for the T junction city road on one of streets in the town of Łódź (Poland).
Źródło:: Archives of Acoustics; 2016, 41, 3; 543-558
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Analysis of Spectral Characteristics of Sound Waves Scattered from a Cracked Cylindrical Elastic Shell Filled with a Viscous Fluid
Autorzy:: Piddubniak, O.
Piddubniak, N.
Powiązania:: https://bibliotekanauki.pl/articles/177916.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: sound scattering
elastic shell
slit
scattering amplitude
pattern directivity
seawater
oil
Opis:: The scattering of plane steady-state sound waves from a viscous fluid-filled thin cylindrical shell weak- ened by a long linear slit and submerged in an ideal fluid is studied. For the description of vibrations of elastic objects the Kirchhoff-Love shell-theory approximation is used. An exact solution of this problem is obtained in the form of series with cylindrical harmonics. The numerical analysis is carried out for a steel shell filled with oil and immersed in seawater. The modules and phases of the scattering amplitudes versus the dimensionless wavenumber of the incident sound wave as well as directivity patterns of the scattered field are investigated taking into consideration the orientation of the slit on the elastic shell surface. The plots obtained show a considerable influence of the slit and viscous fluid filler on the diffraction process.
Źródło:: Archives of Acoustics; 2013, 38, 3; 335-350
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

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