مؤتمر
Nonlinear parabolic equation model for finite-amplitude sound propagation in an inhomogeneous medium over a non-flat, finite-impedance ground surface
| العنوان: | Nonlinear parabolic equation model for finite-amplitude sound propagation in an inhomogeneous medium over a non-flat, finite-impedance ground surface |
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| المؤلفون: | Leissing, T., Jean, P., Defrance, J., Soize, Christian |
| المساهمون: | Laboratoire de Modélisation et Simulation Multi Echelle (MSME), Université Paris-Est Marne-la-Vallée (UPEM)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Centre Scientifique et Technique du Bâtiment (CSTB), Acoustical Society of America |
| المصدر: | Acoustics'08, Second ASA (Acoustical Society of America) - EAA (European Acoustics Association) joint international conference ; https://hal.science/hal-00691718Test ; Acoustics'08, Second ASA (Acoustical Society of America) - EAA (European Acoustics Association) joint international conference, Jun 2008, Paris, France. pp.1-6 |
| بيانات النشر: | HAL CCSD Acoustical Society of America |
| سنة النشر: | 2008 |
| المجموعة: | Hal-CSTB (Centre Scientifique et Technique du Bâtiment) |
| مصطلحات موضوعية: | nonlinear parabolic equation, finite-amplitude sound propagation, inhomogeneous medium, finite-impedance, ground surface, acoustics, nonlinear wave propagation, [SPI.MECA]Engineering Sciences [physics]/Mechanics [physics.med-ph], [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] |
| جغرافية الموضوع: | Paris, France |
| الوصف: | International audience ; A nonlinear parabolic equation (NPE) model for weakly nonlinear sound propagation in an inhomogeneous medium is described. The model being formulated in the time domain, complex impedances cannot be used to simulate ground surfaces. A second NPE model is thus derived to include the medium in the computational system. Based on a nonlinear extension of the Zwikker-Kosten model for rigidly-framed porous media, it allows to include Forchheimer's nonlinearities. Both models are then adapted to terrain-following coordinates, and used together with an interface condition, allow to simulate finite-amplitude sound propagation over a non- flat, finite-impedance ground surface. Numerical examples show that the NPE model is in good agreement with the solutions of the frequency domain boundary element method. Applications of this model to the simulation of sound propagation from explosions in air are then discussed. |
| نوع الوثيقة: | conference object |
| اللغة: | English |
| العلاقة: | hal-00691718; https://hal.science/hal-00691718Test; https://hal.science/hal-00691718/documentTest; https://hal.science/hal-00691718/file/conference-2008-Acoustic_08-Paris-leissing-jean-defrance-soize-preprint.pdfTest |
| الإتاحة: | https://hal.science/hal-00691718Test https://hal.science/hal-00691718/documentTest https://hal.science/hal-00691718/file/conference-2008-Acoustic_08-Paris-leissing-jean-defrance-soize-preprint.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.8F9A6108 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |