Download or read book DYNAMIQUE DES MECANISMES DEFORMABLES written by SEYED HOSSEIN.. AKHAVAN GHADAKI and published by . This book was released on 1992 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE BUT DE CETTE THESE EST D'ETUDIER LA MODELISATION DU COMPORTEMENT DYNAMIQUE DES MECANISMES DEFORMABLES. LES DEUX PREMIERES PARTIES CORRESPONDENT A L'INTRODUCTION, L'ETAT DE L'ART AINSI QUE L'ANALYSE DES DIFFERENTS CRITERES QUI SONT PRIS EN COMPTE DANS LA FORMULATION DU COMPORTEMENT DYNAMIQUE DES SYSTEMES MULTICORPS AYANT OU NON DES CORPS DEFORMABLES. LES TROIS CHAPITRES SUIVANTS SONT CONSACRES AUX TROIS MODELES DYNAMIQUES. LE PREMIER EST BASE SUR LA METHODE DE WITTENBURG ET PERMET D'OBTENIR L'ENSEMBLE MINIMAL D'EQUATIONS DE MOUVEMENT DE SYSTEME SOUS FORME MATRICIELLE. CE MODELE EST APPLIQUE ENSUITE A UN MECANISME UTILISE PAR D'AUTRES AUTEURS DANS LA LITTERATURE. LE DEUXIEME MODELE EST BASE SUR LA METHODE DE KANE. IL EST RECURSIF ET NE PEUT ETRE UTILISE QUE SOUS FORME NUMERIQUE. LE TROISIEME EST UN MODELE APPROCHE BASE SUR L'UTILISATION DES LIAISONS FICTIVES AVEC DES RESSORTS LOCAUX. AINSI, LA FLEXIBILITE REPARTIE DU CORPS DEFORMABLE EST REMPLACEE PAR UN CERTAIN NOMBRE DE FLEXIBILITES CONCENTREES. LE SIXIEME CHAPITRE CONCERNE LES RESULTATS NUMERIQUES DE L'APPLICATION DU MODELE APPROCHE AUX DIFFERENTS MECANISMES. ENFIN, DANS LE DERNIER CHAPITRE EST PRESENTE UNE DISCUSSION SUR LA VALIDITE DES RESULTATS OBTENUS, LES AVANTAGES ET LES INCONVENIENTS DE CHAQUE MODELE AINSI QUE LES PERSPECTIVES POTENTIELLES POUR LA SUITE DE CETTE ETUDE.

Download or read book M canique des solides d formables written by Alain Curnier and published by EPFL Press. This book was released on 2005-01-01 with total page 691 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contribution l tude dynamique des m canismes d formables written by Elsayed Imam and published by . This book was released on 1981 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE EXPERIMENTALE ET THEORIQUE DES COMPORTEMENTS CINEMATIQUE ET ELASTODYNAMIQUE DE MECANISMES PLANS ARTICULES TOURNANT A GRANDE VITESSE. ON PROPOSE UNE METHODE DE CONTROLE DE L'AMPLITUDE DES DEFORMATIONS ELASTIQUES CREEES PAR LA ROTATION INCLUANT LES EFFETS DE L'AMORTISSEMENT, CE QUI PEUT APPORTER UNE AIDE A LA CONCEPTION DE CES SYSTEMES. LORSQUE LE MECANISME TOURNE, SES CARACTERISTIQUES DE RAIDEUR ET DE MASSE VARIENT POUR CHAQUE POSITION ANGULAIRE. ON DEVELOPPE UNE METHODE PARTICULIERE D'ANALYSE. A PARTIR DES EQUATIONS DU MOUVEMENT D'UNE POUTRE TOURNANT DANS LE PLAN ON DETERMINE PAR LA METHODE DES ELEMENTS FINIS LES MATRICES CARACTERISTIQUES EN TENANT COMPTE DES DEFORMATIONS ELASTIQUES LONGITUDINALES ET DE FLEXION ET DES FORCES DE CORIOLIS. L'ANALYSE MODALE POUR DIFFERENTES VALEURS DE L'ANGLE DE LA POSITION DETERMINE LA REPONSE DYNAMIQUE. ON EXAMINE L'INFLUENCE D'UN AMORTISSEMENT. LES METHODES DE CALCUL POUR UN MECANISME A 4 BARRES DONNENT DES RESULTATS EN ACCORD AVEC L'EXPERIENCE, GENERALISABLES A TOUS LES MECANISMES SPATIAUX. L'INTRODUCTION DE L'AMORTISSEMENT PERMET DE CONTROLER L'AMPLITUDE DES DEFORMATIONS ET DES CONTRAINTES

Download or read book SIMULATION DYNAMIQUE DES MECANISMES DEFORMABLES written by MARC.. DIJOUD and published by . This book was released on 1997 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: UNE ANALYSE CRITIQUE DES TECHNIQUES EXISTANTES EN SIMULATION DYNAMIQUE POUR LES MECANISMES DEFORMABLES NOUS A PERMIS DE FAIRE DES CHOIX POUR DEVELOPPER UN LOGICIEL INDUSTRIEL. UNE PHASE PRELIMINAIRE TENTE DONC DE DONNER UN APERCU COMPLET SUR LES DIFFICULTES PLURIDISCIPLINAIRES RENCONTREES ET LES SOLUTIONS ENVISAGEABLES. NOUS ABORDONS NOTAMMENT LE PARAMETRAGE DES ROTATIONS FINIES, L'OBTENTION DES EQUATIONS DU MOUVEMENT, L'INTEGRATION NUMERIQUE D'EQUATIONS ALGEBRO-DIFFERENTIELLES, LA SOUPLESSE DES COMPOSANTS ET LE TRAITEMENT DES CONTACTS. LA METHODE DE SIMULATION RETENUE ASSOCIE LES MULTIPLICATEURS DE LAGRANGE, EN PARTICULIER POUR LES FERMETURES DE CHAINES CINEMATIQUES, ET LES COORDONNEES CONVECTEES DEFINIES DANS UN REFERENTIEL MOBILE. LE MECANISME EST EN EFFET FORME DE CORPS EN GRANDS DEPLACEMENTS, GRANDES ROTATIONS MAIS LES COMPOSANTS DEFORMABLES DE LA CHAINE SONT MODELISES A L'AIDE D'ELEMENTS FINIS POUTRES ET COQUES EN PETITES DEFORMATIONS PAR RAPPORT A UNE CONFIGURATION NON DEFORMEE LIEE A UN NUD DU CORPS. DES TERMES DE COUPLAGES GRANDS DEPLACEMENTS PETITES DEFORMATIONS COMPLETENT LA FORMULATION ELEMENTS FINIS HABITUELLE. LES AUGMENTATIONS DE TAILLE DU SYSTEME NUMERIQUE ET LE ROLE NEFASTE DES FREQUENCES PROPRES MECANIQUES ELEVEES SUR LES PAS DE TEMPS SONT MINIMISES PAR PROJECTION SUR UNE BASE MODALE TRONQUEE. POUR L'INTEGRATION NUMERIQUE EN TEMPS, UNE FORMULE EXPLICITE DE RUNGE-KUTTA D'ORDRE QUATRE EST UTILISEE. UNE GENERALISATION POLYNOMIALE DE CETTE FAMILLE DE SCHEMAS EST PROPOSEE POUR CONTROLER ECONOMIQUEMENT LES PAS DE TEMPS ET DETECTER LES EVENEMENTS DISCRETS, TELS LES IMPACTS, QUI PROVOQUENT DES DISCONTINUITES DU MOUVEMENT. LES DEVELOPPEMENTS SONT VALIDES SUR DES EXEMPLES SIMPLES TIRES DE LA LITTERATURE OU TRAITES EN PARALLELE AVEC ABAQUS OU ANSYS. UNE CONFRONTATION AVEC L'EXPERIMENTATION EST EGALEMENT PRESENTEE SUR UN ROBOT RRR. DANS CETTE APPLICATION, L'EVOLUTION 3D MESUREE DES BRAS QUASI-RIGIDES DU ROBOT EST COMPAREE AUX RESULTATS DE SIMULATION

Download or read book ETUDE DU MOUVEMENT DES MECANISMES PLANS DEFORMABLES written by XIONG YOUDE. and published by . This book was released on 1984 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE D'UNE STRUCTURE PLANE QUI COMPRTE PLUSIEURS BRAS. ON UTILISE LA MATRICE DE RIGIDITE, LA MATRICE MASSE AINSI QUE L'EQUATION DYNAMIQUE POUR OBTENIR LES POSITIONS, LES VITESSES ET LES ACCELERATIONS DU SYSTEME. ON DETERMINE LES POSITIONS, VITESSES ET ACCELERATIONS DES POINTS D'UN ELEMENT TRES DEFORMABLE, QUAND IL DEPLACE UNE MASSE IMPORTANTE D'UN POINT A UN AUTRE EN PARCOURANT UN ANGLE DE 90 DEGRES. ON ETUDIE LA FORME DE LA FONCTION REPRESENTANT LE COUPLE EXTERIEUR, PAR LEQUEL LE BRAS DE ROBOT PEUT S'ARRETER A 90 DEGRES SANS VIBRATIONS. EFFET SUR LE MOUVEMENT DU MOMENT QUADRATIQUE DE FLEXION, DE LA VITESSE ET DE LA MASSE TRANSPORTEE

Download or read book El ments de dynamique des solides et structures d formables written by Lalaonirina Rakotomanana and published by EPFL Press. This book was released on 2009-06-25 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage a pour objectif d'exposer les éléments nécessaires à la modélisation dynamique des structures élastiques minces comme les poutres, les plaques et les coques, et en particulier les outils de base que représentent l'analyse modale et la méthode analytique de décomposition modale. Des rappels des principales notions de thermomécanique, des lois de comportement des solides, ainsi qu'un chapitre sur les ondes et vibrations dans les milieux volumiques viscoélastiques complètent l'exposé. De nombreux exemples d'applications accompagnés de solutions analytiques illustrent chacun des chapitres, et une série d'exercices clés permettent au lecteur de tester la bonne assimilation des connaissances indispensables à la modélisation des vibrations des structures continues.

Download or read book DYNAMIQUE DES SYSTEMES MECANIQUES DEFORMABLES written by André Barraco and published by . This book was released on 1983 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: ON ESSAIE DE DEVELOPPER UNE APPROCHE PERMETTANT DE PRENDRE EN COMPTE A LA FOIS LA DEFORMATION DU MILIEU, AVEC TOUS SES EFFETS, AINSI QU'UNE REPARTITION SPATIALE DES MASSES. COMME CAS PARTICULIERS DE LA FORMULATION PROPOSEE ON RETROUVE, EN NEGLIGEANT LA DEFORMATION, LA DESCRIPTION DES MECANISMES FORMES D'ELEMENTS INDEFORMABLES ET EN NEGLIGEANT LES VITESSES, LA DESCRIPTION DU COMPORTEMENT STATIQUE DES STRUCTURES, EN GRANDS DEPLACEMENTS ET SURTOUT GRANDES ROTATIONS

Download or read book Computational Dynamics in Multibody Systems written by Manuel F.O. Seabra Pereira and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the edited version of selected papers presented at the Nato Advanced Study Institute on "Computer Aided Analysis of Rigid and Flexible Mechanical Systems", held in Portugal, from the 27 June to 9 July, 1994. The present volume can be viewed as a natural extension of the material addressed in the Institute which was published by KLUWER in the NATO ASI Series, Vol. 268, in 1994. The requirements for accurate and efficient analysis tools for design of large and lightweight mechanical systems has driven a strong interest in the challenging problem of multibody dynamics. The development of new analysis and design formulations for multi body systems has been more recently motivated with the need to include general features such as: real-time simulation capabilities, active control of machine flexibilities and advanced numerical methods related to time integration of the dynamic systems equations. In addition to the presentation of some basic formulations and methodologies in dynamics of multibody systems, including computational aspects, major applications of developments to date are presented herein. The scope of applications is extended to vehicle dynamics, aerospace technology, robotics, mechanisms design, intermittent motion and crashworthiness analysis. Several of these applications are explored by many contributors with a constant objective to pace development and improve the dynamic performance of mechanical systems avoiding different mechanical limitations and difficult functional requirements, such as, for example, accurate positioning of manipulators.

Download or read book VIBRATION DE MECANISMES PLANS DEFORMABLES written by JIN.. SHUYUAN and published by . This book was released on 1985 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: FORMULATION DU COMPORTEMENT DYNAMIQUE DE MECANISMES PLANS DEFAVORABLES. METHODE DE RESOLUTION NUMERIQUE. ETUDE D'UN MECANISME PARTICULIER. DETERMINATION EXPERIMENTALE DES VALEURS PROPRES DU MECANISME

Download or read book The Shock and Vibration Bulletin written by and published by . This book was released on 1982 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Robotics and Factories of the Future 87 written by R. Radharamanan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers presented at the Second International Conference on Robotics and Factories of the Future held in San Diego, California, USA during July 28-31, 1987 are compiled in this volume. Over two hundred participants attended the conference, made technical presentations and discussed about various aspects of manufacturing, robotics and factories of the future. The number of papers published in this volume and the number of unpublished presentations at the conference indicates the evidance of growing interest in the areas of CAD/CAM, robotics and their role in future factories. The conference consisted of five plenary sessions, twenty three technical sessions, workshops, and exhibits from local industries and educational institutions. I wish to acknowledge with many thanks the contributions of all the authors who presented their work at the conference and submitted the manuscripts for publication. It is also my pleasure to acknowledge the role of keynote, banquet, and plenary sessions speakers whose contributions added greatly to the success of the conference. My sincere thanks to all session chairmen. I wish that the series of the International Conferences on Robotics and Factories of the Future which was initiated in 1984 in Charlotte, North Carolina will have a major impact on the use of robots and computers in the automated factories of the future.

Download or read book The World Yearbook of Robotics Research and Development written by Sbornik Statei and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: How quickly the technological 'flavour of the month' changes. At the beginning of the 1980's many saw 'robotics' as being something of a pana cea for those problems in the manufacturing industries which had been exacerbated by the world recession. Those working at the time in the field of robotics stressed that robots themselves were only part of the solution. Yet in many quarters the 'hype' for the new technology apparently knew few bounds, resulting, inexorably, in many industries painfully discover ing for themselves a new realism, closely followed by disillusionment. In its wider sense the term 'robotics' covers an extremely broad spec trum of technologies ranging from extremely flexible, highly sensory and integrated systems capable of handling a very diverse product range, through to comparatively inflexible, high volume systems which can merely handle slightly different variations of the same basic product. As a result of the one 'buzzword' referring to such a variety of actual system types, the disillusionment which started to become apparent during the early 1980's acted as something of a double edged sword. A given com pany might consider a particular robotics-based technological solution to its production problems, find that it was unsuitable, and so renounce all robotics approaches as inappropriate. Yet just because one position on that spectrum of technological solutions was unsuitable for the company should not have led them to assume that there was no other robotics solu tion that was appropriate.

Download or read book Formalismes de la dynamique rationnelle des syst mes m caniques de Newton Kane written by and published by Ed. Techniques Ingénieur. This book was released on with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Revue Roumaine Des Sciences Techniques written by and published by . This book was released on 1984 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synth se et tude lasto dynamique d une chaine ferm e de solides articul s written by Tian Bo Wang and published by . This book was released on 1989 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: ETUDE DES MECANISMES ARTICULES CARACTERISTIQUES DES MANIPULATEURS ET DE LA ROBOTIQUE. SYNTHESE DES MECANISMES. CAS DE MECANISMES DEFORMABLES. ETUDE ELASTODYNAMIQUE. ETUDE DES VIBRATIONS. CALCULS PAR ELEMENTS FINIS

Download or read book Mechatronics the Basis for New Industrial Development written by Memis̜ Acar and published by Computational Mechanics. This book was released on 1994 with total page 856 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acta mathematica written by and published by . This book was released on 1923 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt: