Download or read book Contribution l tude des modes de rayonnement acoustique d une structure written by Olivier Schevin and published by . This book was released on 2001 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CONTRIBUTION A L ETUDE DU RAYONNEMENT ACOUSTIQUE DE STRUCTURES MECANIQUES NERVUREES APPLICATION A LA CONCEPTION DE BOITES DE VITESSES written by SYLVIE.. RENARD LE MOYNE and published by . This book was released on 1999 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS L'OBJECTIF D'OPTIMISER LES CALCULS DE RAYONNEMENT ACOUSTIQUE DE STRUCTURE DE TYPE CARTER, A L'AIDE DE METHODES ELEMENTS FRONTIERE, LE ROLE ACOUSTIQUE DES NERVURES, AINSI QUE LA NECESSITE DE LES MODELISER, ONT ETE ETUDIES. UNE PREMIERE ETUDE SUCCINCTE DU RAYONNEMENT D'UN CARTER DE BOITE DE VITESSES AUTOMOBILE A MONTRE QUE LES NERVURES POUVAIENT AVOIR UN ROLE ACOUSTIQUE NON NEGLIGEABLE. L'ETUDE A DONC ETE POURSUIVIE SUR DES PLAQUES PLANES NERVUREES PERMETTANT D'ISOLER LES DIFFERENTS PARAMETRES QUI ENTRENT EN JEU. LE ROLE ACOUSTIQUE DES NERVURES EST DIVISE EN TROIS PHENOMENES PHYSIQUES DISTINCTS : L'EFFET VIBRATOIRE, L'EFFET SOURCE ET L'EFFET D'OBSTACLE. UNE ETUDE BIBLIOGRAPHIQUE A MONTRE QUE L'EFFET VIBRATOIRE EST AUJOURD'HUI BIEN CONNU ET MAITRISE, CE QUI N'EST PAS LE CAS DES DEUX AUTRES EFFETS, PUREMENT ACOUSTIQUES. POUR CHACUN DE CES EFFETS, UNE DEMARCHE DE VA-ET-VIENT PERMANENT ENTRE ETUDE EXPERIMENTALE, CALCULS NUMERIQUES, CALCULS ANALYTIQUES, A PERMIS D'EXPLIQUER CES PHENOMENES PHYSIQUES ET DE DEFINIR LEUR INFLUENCE SUR LE RAYONNEMENT ACOUSTIQUE D'UNE STRUCTURE. DES CRITERES D'EVALUATION DE CES INFLUENCES ONT ETE PROPOSES ET VALIDES POUR LES PLAQUES NERVUREES, PUIS POUR LE CARTER DE BOITE DE VITESSES.
Download or read book Rayonnement acoustique de structures vibrantes written by Cédric Maury and published by . This book was released on 1999 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE TRAVAIL PRESENTE PORTE SUR L'ETUDE EN REGIME TEMPOREL ET FREQUENTIEL DU RAYONNEMENT ACOUSTIQUE DE STRUCTURES VIBRANTES. LE BUT DE CE TRAVAIL EST D'ETENDRE LES MODELES DE PREDICTION DE LA REPONSE VIBRO-ACOUSTIQUE DE STRUCTURES SIMPLES EN REGIME HARMONIQUE EN PRENANT EN COMPTE, D'UNE PART, L'EXCITATION DES STRUCTURES PAR DES SIGNAUX TRANSITOIRES ET, D'AUTRE PART, LA MODELISATION DE STRUCTURES PLUS COMPLEXES SUR LE PLAN GEOMETRIQUE ET MECANIQUE. LA METHODE PROPOSEE EST UNE METHODE ORIGINALE BASEE SUR LA REPRESENTATION, DANS LE DOMAINE TEMPOREL OU FREQUENTIEL, DE LA REPONSE DU SYSTEME STRUCTURE - FLUIDE EN SERIE DE SES MODES DE RESONANCE QUI SONT DES SOLUTIONS PROPRES NATURELLES DU PROBLEME COUPLE. ELLES SONT APPROCHEES PAR DES METHODES DE TYPE SPECTRAL : DEVELOPPEMENT DES CHAMPS INCONNUS EN SERIE (TRONQUEE) DE POLYNOMES DE LEGENDRE. L'INTERET D'UNE TELLE APPROXIMATION PAR RAPPORT A DES METHODES DE DISCRETISATION LOCALE EST DE POUVOIR, A EFFORT NUMERIQUE DONNE, ATTEINDRE DES FREQUENCES PLUS ELEVEES. NOUS AVONS APPLIQUE CETTE METHODE A DEUX EXEMPLES IMPORTANTS POUR LESQUELS NOS PREDICTIONS NUMERIQUES POUVAIENT ETRE COMPAREES A DES RESULTATS EXPERIMENTAUX FIABLES. IL S'AGIT, D'UNE PART, DE L'ETUDE DE LA DIFFRACTION D'UNE ONDE ACOUSTIQUE PAR UNE COQUE ELASTIQUE DE FORME LINE-2 (COQUE CYLINDRIQUE FERMEE PAR DES EMBOUTS HEMISPHERIQUES) EN REGIME HARMONIQUE ET TRANSITOIRE, ET D'AUTRE PART, DE L'ETUDE EN REGIME HARMONIQUE DE LA TRANSMISSION ET DU RAYONNEMENT PAR UNE PLAQUE BAFFLEE RAIDIE. LES COMPARAISONS CALCUL/EXPERIENCE ONT MONTRE L'EFFICACITE DE LA METHODE MODES DE RESONANCE. LES PERFORMANCES DE CETTE APPROCHE SEMI-ANALYTIQUE ONT AUTORISE DES ETUDES PARAMETRIQUES APPROFONDIES EN TEMPOREL ET EN FREQUENTIEL.
Download or read book Physical Acoustics written by M.A. Breazeale and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains 17 invited papers and 80 communicated papers presented at the International Symposium on Physical Acoustics, held at the University Campus of Kortrijk, Belgium, from 19-22 June 1990. The twenty-fifth anniversary of the Campus was celebrated with special activi ties such as concerts, exhibitions and scientific meetings. This symposium was a part of the celebration. The 120 participants came from 18 different countries. Among the largest groups we mention 32 French contributions and 19 contributions from the U.S.S.R. We especially thank Prof. V.V. Proklov from Moscow and Prof. S.V. Kulakov from Leningrad who helped us with the distribution of invitations in the U.S.S.R. We also thank Prof. G. Quentin and Ir B. Poiree from Paris who endeav oured to inform all French acousticians. We thank all the lecturers for their effort in producing the material for the book in time. The invited lectures have been collected and retyped by Prof. M. Breazeale (U.S.A.), while the contributed papers were collec ted by Prof. O. Leroy and retyped in Belgium. The first 200 pages of the book comprise the invited lectures, not classified by topic, but are in alphabetical order with reference to the first author. The second part of the book contains the contributed papers and posters also classified in alphabetical order according to the first author.
Download or read book RAYONNEMENT ACOUSTIQUE DE PLAQUES COUPLEES DANS UNE CAVITE written by Pascal Millot and published by . This book was released on 1987 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: ANALYSE DU PHENOMENE DE RAYONNEMENT PAR DES ASSEMBLAGES DE PLAQUES, STRUCTURE TYPIQUE DU BATIMENT ET DES CAPOTS DE MACHINE
Download or read book Proceedings of the International Congress on Acoustics written by and published by . This book was released on 1983 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contribution l tude du rayonnement acoustique des obstacles de r volution en incidence quelconque basse fr quence written by Saadia Tallal Rifai and published by . This book was released on 1990 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL EST UNE CONTRIBUTION A L'ETUDE DU RAYONNEMENT ACOUSTIQUE DES OBSTACLES DE REVOLUTION EN INCIDENCE QUELCONQUE ET A BASSE FREQUENCE. LA PREMIERE PARTIE DECRIT NOTRE ETUDE EXPERIMENTALE DES EFFETS DE DIFFRACTION SUR LA MESURE DE L'INTENSITE ACOUSTIQUE. CETTE ETUDE CONFIRME QUE L'INFLUENCE DE LA DIFFRACTION PEUT ETRE PRISE EN COMPTE EN REMPLACANT DANS L'EXPRESSION DE L'INTENSITE ACOUSTIQUE, LA SEPARATION GEOMETRIQUE PAR UNE SEPARATION APPARENTE. DANS UN DEUXIEME TEMPS, A PARTIR DE CONFIGURATIONS GEOMETRIQUES DONT LES SOLUTIONS EXACTES SONT CONNUES, NOUS CALCULONS LES CARACTERISTIQUES PROPRES A L'ONDE RAYONNEE ET SOULIGNONS LES RAISOS POUR LESQUELLES CETTE SEPARATION GEOMETRIQUE DOIT ETRE REMPLACEE PAR UNE SEPARATION APPARENTE. PUIS, AUX BASSES FREQUENCES, EN INCIDENCE QUELCONQUE ET POUR UN OBSTACLE A SYMETRIE DE REVOLUTION AUTOUR D'UN AXE, NOUS ETABLISSONS LA VALEUR DE LA PRESSION RAYONNEE SUR LA SURFACE DE L'OBSTACLE, AVEC UNE DEPENDANCE EXPLICITE EN (ANGLE D'INCIDENCE) ET (ANGLE POLIARE CLASSIQUE). LA RESOLUTION NUMERIQUE COMPLETE CONSISTE, AUX BASSES FREQUENCES, EN LA RESOLUTION D'UN NOMBRE FINI D'EQUATIONS INTEGRALES SUR UN DOMAINE UNIDIMENSIONNEL. LES RESULTATS NUMERIQUES, DANS LE CAS D'UN CYLINDRE DE LONGUEUR FINIE, SONT COMPARES AUX RESULTATS EXACTS D'UNE FORME GEOMETRIQUE VOISINE, LE SPHEROIDE
Download or read book Mod lisation du rayonnement acoustique d une structure olienne en mode non rotatif et son effet sur une structure lastique avoisinante written by Mehdi El Idrissi Esserhrouchni and published by . This book was released on 2010 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CONTRIBUTION A L ETUDE DES EFFETS DE CONVECTION ET DE REFRACTION D UNE ONDE ACOUSTIQUE DANS UN ECOULEMENT written by J.. RANDON and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: UNE ETUDE BIBLIOGRAPHIQUE SUR LE CALCUL DU CHAMP SONORE RAYONNE PAR UN ECOULEMENT INHOMOGENE CONDUIT A ETABLIR UNE EQUATION DE PROPAGATION DU DEUXIEME ORDRE, QUE L'ON RESOUD EN SUPPOSANT QUE VITESSE MOYENNE ET TEMPERATURE SONT DES FONCTIONS D'UNE SEULE VARIABLE. ON SE SERT DE LA THEORIE DE L'ACOUSTIQUE GEOMETRIQUE APPLICABLE A DES LONGUEURS D'ONDES SONORES PETITES DEVANT LES INHOMOGENEITES DU MILIEU. ETUDE DE LA REFRACTION DES ONDES SONORES DANS L'ATMOSPHERE ET DANS DEUX MILIEUX CONVECTIFS HOMOGENES, SEPARES SUR UNE SURFACE DE DISCONTINUITE. CALCUL DU RAYONNEMENT ACOUSTIQUE D'UN JET CHAUD: DESCRIPTION DES HYPOTHESES ET DES RESULTATS
Download or read book ESA Scientific and Technical Review written by European Space Agency and published by . This book was released on 1975 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acoustics of Musical Instruments written by Antoine Chaigne and published by Springer. This book was released on 2016-05-12 with total page 855 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, the first English-language translation of Acoustique des instruments de musique, Second Edition, presents the necessary foundations for understanding the complex physical phenomena involved in musical instruments. What is the function of the labium in a flute? Which features of an instrument allow us to make a clear audible distinction between a clarinet and a trumpet? With the help of numerous examples, these questions are addressed in detail. The authors focus in particular on the significant results obtained in the field during the last fifteen years. Their goal is to show that elementary physical models can be used with benefit for various applications in sound synthesis, instrument making, and sound recording. The book is primarily addressed to graduate students and researchers; however it could also be of interest for engineers, musicians, craftsmen, and music lovers who wish to learn about the basics of musical acoustics.
Download or read book Journal de Physique written by and published by . This book was released on 1991 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Actes du 5 me congr s fran ais d acoustique written by and published by . This book was released on 2000 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1977 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colloque de Physique written by and published by . This book was released on 1990 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1991-10 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Mechanics Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.
