Finite-element analysis of the nonlinear propagation of high-intensity acoustic waves

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Abstract
11 páginas, 13 figuras, 2 tablas, 1 apéndiceThis paper deals with a three-dimensional numerical procedure based on the finite-element method\ud for the modeling of finite-amplitude progressive acoustic waves. The method can predict the\ud nonlinear propagation of acoustic fields produced by sources of arbitrary geometry. Based upon a\ud perturbation method, a second-order analytical study is developed and the numerical procedure is\ud formulated. Basic equations are derived and their ranges of validity established. The analytical\ud validation of the numerical development is presented. An experimental validation is also carried out\ud for the nonlinear acoustic field radiated by a stepped-plate transducerThis research was supported by a postdoctoral fellowship\ud of the DGICT (State Secretary of Universities and Research)\ud Ref No.: EX94 70735053 and a post-doctoral contract\ud of the CSIC (Higher Council for Scientific Research).\ud The work was developed within the frame of the Projects\ud CICYT-AMB96-A211-CO2 and BRITE/EURAM No.\ud BRPR-CT96-0157. The authors would like to thank Dr. L.\ud Elvira-Segura for his very valuable help in doing experiments.Peer reviewe

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