Titre :

High-order solution of nonlinear acoustic wave equation for isotropic solids using perturbation and finite difference methods

Auteur(s) :

Lyu, Wenhan [Auteur]
University of Chinese Academy of Sciences [Beijing] [UCAS]
Wu, Xianmei [Auteur]
University of Chinese Academy of Sciences [Beijing] [UCAS]
Xu, Wei Jiang [Auteur]
INSA Institut National des Sciences Appliquées Hauts-de-France [INSA Hauts-De-France]
Transduction, Propagation et Imagerie Acoustique - IEMN [TPIA - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Chen, Jiayi [Auteur]
University of Chinese Academy of Sciences [Beijing] [UCAS]

Titre de la manifestation scientifique :

14th International Conference on Theoretical and Computational Acoustics, ICTCA 2019

Ville :

Beijing

Pays :

Chine

Date de début de la manifestation scientifique :

2019-07-28

Discipline(s) HAL :

Sciences de l'ingénieur [physics]
Informatique [cs]
Physique [physics]

Résumé en anglais : [en]

Nonlinear acoustic wave equation with Murnaghan parameters in isotropic solids is usually resolved by perturbation method [1-3]. High-order harmonics are obtained by expanding the equation in one linear and a series of ...
Lire la suite >Nonlinear acoustic wave equation with Murnaghan parameters in isotropic solids is usually resolved by perturbation method [1-3]. High-order harmonics are obtained by expanding the equation in one linear and a series of nonlinear equations. It is found that errors in harmonics will be accumulated when the order is increased. To estimate these errors at high-order harmonics, numerical method of finite difference in time domain (FDTD) was employed and the solutions were compared to those obtained by perturbation method. Computational parameters from steel were used as an example. Results show that perturbation solutions of fundamental wave and the second-order harmonics are in good agreements with the solutions in FDTD, relative errors are no more than 10%. While for higher order harmonics, relative errors increase heavily, especially for solutions at longer propagation distance or with higher driving amplitude, the difference is up to 50%, or even higher.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL