Angebote zu "Linear" (87 Treffer)

Identifikation linearer Dämpfungsmodelle für We...
33,99 € *
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Identifikation linearer Dämpfungsmodelle für Werkzeugmaschinenstrukturen

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Stand: 07.11.2017
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CNC Milling Programming. Linear & Circular inte...
2,99 € *
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Research Paper (postgraduate) from the year 2017 in the subject Engineering - Mechanical Engineering, University of the Witwatersrand, language: English, abstract: A combined 3D linear and circular interpolation principle is developed on the basis of the 3D linear and circular interpolation principles. The task was to choose and design a creative item to be machined using CNC machining, which then required to write a code using CNC language. Prior to the machining process, we did a Computer Aided Design (CAD) drawing of the workpiece. The drawing was further modified with the final model drawn using Auto Desk Inventor. We used foam for our model and a 31 diameter end mill tool. The main problem that was experienced was the cutting time; the model took longer to be complete. The cutting time was affected by the complexity of the design, chosen tool size and the cutting technique. Besides, we learnt from the demonstration that the shorter the constructed code the more robust it is, using a bigger tool is more efficient in terms of saving energy and time, and that if the code is correct the CNC machine model becomes identical to that of the product Design. Roland Nathan Kalonji first became interested in music and drawing when he was 7. In 2014 he received a Bachelor in Information Technology (UPL university-DRC) ,Higher Certificate in Sound Technology (Revolution Media Academy-RSA,2016),PG Dip in Aero and Industrial Engineering(University of the Witwatersrand, Johannesburg, South Africa,2017). His first endeavours in the engineering field were Analysis and Optimization of a Biodiesel Production from Waste Cooking Oil and Ultrasonic Monitoring System for railway tracks . He is currently persuing his master at University of the Witwatersrand(School of Mechanical,Industrial and Aeronautical Engineering ).His research interests are in the areas of Operations Research Methods and Systems engineering.

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Stand: 26.03.2018
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Regelungstechnik 1 - Lineare und nichtlineare R...
39,95 € *
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Control Technology 1 provides a clear introduction to the topic, and contains many charts and diagrams. This newly corrected and optimized edition includes a thorough presentation of the required theoretical background knowledge. For independent mastery of the content, there are many calculated examples and exercises with solutions. Gerd Schulz, Klemens Graf, FH München.

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Stand: 07.11.2017
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Fundamentals of Finite Element Analysis - Linea...
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An introductory textbook covering the fundamentals of linear finite element analysis (FEA) This book constitutes the first volume in a two-volume set that introduces readers to the theoretical foundations and the implementation of the finite element method (FEM). The first volume focuses on the use of the method for linear problems. A general procedure is presented for the finite element analysis (FEA) of a physical problem, where the goal is to specify the values of a field function. First, the strong form of the problem (governing differential equations and boundary conditions) is formulated. Subsequently, a weak form of the governing equations is established. Finally, a finite element approximation is introduced, transforming the weak form into a system of equations where the only unknowns are nodal values of the field function. The procedure is applied to one-dimensional elasticity and heat conduction, multi-dimensional steady-state scalar field problems (heat conduction, chemical diffusion, flow in porous media), multi-dimensional elasticity and structural mechanics (beams/shells), as well as time-dependent (dynamic) scalar field problems, elastodynamics and structural dynamics. Important concepts for finite element computations, such as isoparametric elements for multi-dimensional analysis and Gaussian quadrature for numerical evaluation of integrals, are presented and explained. Practical aspects of FEA and advanced topics, such as reduced integration procedures, mixed finite elements and verification and validation of the FEM are also discussed. Provides detailed derivations of finite element equations for a variety of problems. Incorporates quantitative examples on one-dimensional and multi-dimensional FEA. Provides an overview of multi-dimensional linear elasticity (definition of stress and strain tensors, coordinate transformation rules, stress-strain relation and material symmetry) before presenting the pertinent FEA procedures. Discusses practical and advanced aspects of FEA, such as treatment of constraints, locking, reduced integration, hourglass control, and multi-field (mixed) formulations. Includes chapters on transient (step-by-step) solution schemes for time-dependent scalar field problems and elastodynamics/structural dynamics. Contains a chapter dedicated to verification and validation for the FEM and another chapter dedicated to solution of linear systems of equations and to introductory notions of parallel computing. Includes appendices with a review of matrix algebra and overview of matrix analysis of discrete systems. Accompanied by a website hosting an open-source finite element program for linear elasticity and heat conduction, together with a user tutorial. Fundamentals of Finite Element Analysis: Linear Finite Element Analysis is an ideal text for undergraduate and graduate students in civil, aerospace and mechanical engineering, finite element software vendors, as well as practicing engineers and anybody with an interest in linear finite element analysis. Yannis Koutromanos, PhD, is an Assistant Professor in the Department of Civil and Environmental Engineering at the Virginia Polytechnic Institute and State University. His research primarily focuses on the analytical simulation of structural components and systems under extreme events, with an emphasis on reinforced concrete, masonry and steel structures under earthquake loading. He has authored and co-authored research papers and reports on finite element analysis (element formulations, constitutive models, verification and validation of modeling schemes). He is a voting member of the joint ACI/ASCE Committee 447, Finite Element Analysis of Reinforced Concrete Structures .

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Stand: 20.02.2018
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Fundamentals of Finite Element Analysis - Linea...
86,99 € *
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An introductory textbook covering the fundamentals of linear finite element analysis (FEA) This book constitutes the first volume in a two-volume set that introduces readers to the theoretical foundations and the implementation of the finite element method (FEM). The first volume focuses on the use of the method for linear problems. A general procedure is presented for the finite element analysis (FEA) of a physical problem, where the goal is to specify the values of a field function. First, the strong form of the problem (governing differential equations and boundary conditions) is formulated. Subsequently, a weak form of the governing equations is established. Finally, a finite element approximation is introduced, transforming the weak form into a system of equations where the only unknowns are nodal values of the field function. The procedure is applied to one-dimensional elasticity and heat conduction, multi-dimensional steady-state scalar field problems (heat conduction, chemical diffusion, flow in porous media), multi-dimensional elasticity and structural mechanics (beams/shells), as well as time-dependent (dynamic) scalar field problems, elastodynamics and structural dynamics. Important concepts for finite element computations, such as isoparametric elements for multi-dimensional analysis and Gaussian quadrature for numerical evaluation of integrals, are presented and explained. Practical aspects of FEA and advanced topics, such as reduced integration procedures, mixed finite elements and verification and validation of the FEM are also discussed. Provides detailed derivations of finite element equations for a variety of problems. Incorporates quantitative examples on one-dimensional and multi-dimensional FEA. Provides an overview of multi-dimensional linear elasticity (definition of stress and strain tensors, coordinate transformation rules, stress-strain relation and material symmetry) before presenting the pertinent FEA procedures. Discusses practical and advanced aspects of FEA, such as treatment of constraints, locking, reduced integration, hourglass control, and multi-field (mixed) formulations. Includes chapters on transient (step-by-step) solution schemes for time-dependent scalar field problems and elastodynamics/structural dynamics. Contains a chapter dedicated to verification and validation for the FEM and another chapter dedicated to solution of linear systems of equations and to introductory notions of parallel computing. Includes appendices with a review of matrix algebra and overview of matrix analysis of discrete systems. Accompanied by a website hosting an open-source finite element program for linear elasticity and heat conduction, together with a user tutorial. Fundamentals of Finite Element Analysis: Linear Finite Element Analysis is an ideal text for undergraduate and graduate students in civil, aerospace and mechanical engineering, finite element software vendors, as well as practicing engineers and anybody with an interest in linear finite element analysis. Yannis Koutromanos, PhD, is an Assistant Professor in the Department of Civil and Environmental Engineering at the Virginia Polytechnic Institute and State University. His research primarily focuses on the analytical simulation of structural components and systems under extreme events, with an emphasis on reinforced concrete, masonry and steel structures under earthquake loading. He has authored and co-authored research papers and reports on finite element analysis (element formulations, constitutive models, verification and validation of modeling schemes). He is a voting member of the joint ACI/ASCE Committee 447, Finite Element Analysis of Reinforced Concrete Structures .

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Stand: 26.12.2017
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Genetische Algorithmen für die Strukturberechnu...
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Masterarbeit aus dem Jahr 2016 im Fachbereich Ingenieurwissenschaften - Maschinenbau, Note: 1,0, Universität der Bundeswehr München, Neubiberg (Fakultät für Leichtbau und Strukturberechnung), Sprache: Deutsch, Abstract: Im Zuge der Wirtschaftlichkeit eines Unternehmens ist bei der Auslegung der meisten strukturmechanischen Bauteile der Einsatz der Finiten-Elemente-Methode nicht mehr wegzudenken. In den letzten Jahrzehnten hat sich diese Methode aufgrund der steigenden Rechnerleistung stark weiterentwickelt. Dabei hat sich Software von den verschiedensten Herstellern auf dem Markt etabliert. Auch die möglichen Funktionen sind vielfältig und reichen von linear statischen Berechnungsansätzen hin zu komplexen nichtlinearen oder kinematischen Analysen. In dieser Arbeit geht es um die Strukturoptimierung mittels sogenannter evolutionärer Algorithmen. Diese Stehen der klassischen Optimierungsmethode gegenüber, wie sie beispielsweise in Finite-Elemente-Programmen (z.B. Altair Hyper-Mesh) hinterlegt sind. Anhand von praxisnahen Beispielen, wie z.B. dem klassischen Biegebalken, soll geprüft werden, in wie weit sich diese Optimierungsmethode eignet und ein Vergleich zu den klassischen Strukturoptimierungen gezogen werden. Optimierungsmethoden, die auf evolutionären bzw. selbstlernenden Algorithmen basieren sind in der Lage, Fehler nach dem Evolutionsprinzip selbstständig zu verbessern. Dabei greift die Software auf die bereits in der Informatik bekannten Algorithmen zurück, die in der Software implementiert sind. Auch in anderen Bereichen, wie z. B. der Schaltungstechnik oder der Mess- und Regelungstechnik sind diese Algorithmen bereits im Einsatz. Sie basieren diese auf dem Prinzip der biologischen Evolution. Bezieht man dieses Prinzip auf die Technik und insbesondere den Einsatz von Computern, so spricht man auch von maschinellem Lernen, also dem selbstständigen Lernen einer Maschine aus zuvor gemachten Fehlern. Dieses evolutionäre Prinzip nach dem Vorbild des natürlichen Selektionsprinzips wird in dieser Arbeit mit den evolutionären Algorithmen in Zusammenhang mit dem Leichtbau gebracht.

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Stand: 13.03.2018
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Technische Mechanik
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Die Technische Mechanik (TM) ist ein unerlässliches Grundlagenfach und bietet das Stefan HartmannRüstzeug für die Planung und Entwicklung komplexer Strukturen wie zum Beispiel Gebäude, Brücken, Fahrzeuge oder Triebwerke. Die TM liefert das theoretische Hintergrundwissen und die Verfahren zur Untersuchung von Kräften und Bewegungen und somit zur Berechnung der Konstruktion, Festigkeit, Lebensdauer und Zuverlässigkeit von Bauteilen. Sie liefert damit die Antwort auf die Frage: Was ist technisch möglich Teilgebiete, die den Inhalt der klassischen Technischen Mechanik darstellen sind Statik, Festigkeitslehre, Kinematik und Dynamik. Stefan Hartmanns Technische Mechanik ist konzipiert als vorlesungsbegleitendes Buch für Ingenieurstudiengänge wie zum Beispiel Bauwesen, Maschinenbau und Verfahrenstechnik an deutschsprachigen Universitäten. Der Autor vermittelt die Grundlagen und prüfungsrelevanten Inhalte dieses zentralen, aber oft gefürchteten Faches auf hohem didaktischen Niveau. Er beschreibt dabei klar strukturiert und schlüssig die großen Themengebiete der klassischen Technischen Mechanik - Statik, Elastostatik, und Dynamik - in einem Band. Es hilft dabei, die in der Vorlesung oder im Seminar behandelten Themen im Selbststudium nachzuarbeiten, kann aber auch zum schnellen Nachschlagen genutzt werden. Mathematische Zusammenhänge werden präzise hergeleitet und systematisch zum Lösen von komplexen Aufgabenstellungen herangezogen. Die dafür notwendige mathematische Sprache (Vektorrechnung, lineare Algebra) wird dem Leser zusätzlich vermittelt. Zahlreiche Abbildungen und kurze, realitätsnahe Übungsaufgaben erleichtern das Verständnis des Lehrstoffs. Eine treffende Zusammenfassung am Ende eines Kapitels gibt zudem Überblick und fokussiert den Blick auf die wichtigsten Konzepte. Der Ingenieurstudent erhält damit das nötige Rüstzeug zur Bewältigung des komplexen Stoffes.

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Stand: 26.12.2017
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Optimale Regelung und Steuerung
99,95 € *
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Die Strukturoptimierung dynamischer Systeme als Variationsproblem - Allgemeine Lösung des Optimierungsproblems - Optimierung linearer Systeme mit quadratischem Gütemaß - Das Maximumprinzip von Pontrjagin - Entwurf zeitoptimaler Systeme - Weitere Anwendungen des Maximumprinzips - Die dynamische Programmierung von Bellmann - Übungsaufgaben mit Lösungen.

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Stand: 12.12.2017
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Prozessoptimierung unter Unsicherheiten
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In diesem Buch werden Lösungsansätze für lineare und nichtlineare, stationäre und dynamische Optimierungsprobleme mit Unsicherheiten entwickelt und auf verschiedene Optimierungsaufgaben der Industrie angewendet. Das Ergebnis liefert optimale und zuverlässige Entscheidungen für Prozessführung und Prozessdesign auch unter Unsicherheiten.

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Stand: 12.12.2017
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Simulation and Optimization of the Currency in ...
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Research Paper (undergraduate) from the year 2014 in the subject Engineering - Mechanical Engineering, grade: 1.3, Pforzheim University, course: Electric Machines, language: English, abstract: The present work is about the design of a linear magnet for an artificial heart in the Konstruktionsseminar Summer term 2014 at the University of Applied Science HS Pforzheim. This work is one part of three different topics about the heart in the course electric machines. It covers the simulation and optimization of the engine from an artificial heart using a linear magnet or further named solenoid. In the winter term 2013, the last semester, a group of students already designed a virtual prototype of the heart and the magnet. But they could not meet the weight requirements therefore the goal and the focus in the Konstruktionsseminar Summer term 2014 was to lower the total weight. However, no analyses had been made of the movement of the anchor and pushing the blood into the chamber. To lower the weight and to raise the power of the solenoid by an exchange of the material, the whole system will be more dynamic as before. To get an optimum of a low weight plus having a dynamic system, which can be controlled by changing the voltage and therefore the currency, the system is getting into an idly condition.

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Stand: 30.01.2018
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