@article{16238, author = {{Hankeln, Frederik and Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{289--290}}, title = {{{Carbon Fibre Prepregs: Simulation of a Thermo-Mechanical-Chemical Coupled Problem}}}, doi = {{10.1002/pamm.201210134}}, year = {{2012}}, } @inproceedings{16408, abstract = {{We present a parallel rendering system for heterogeneous PC clusters to visualize massive models. One single, powerful visualization node is supported by a group of backend nodes with weak graphics performance. While the visualization node renders the visible objects, the backend nodes asynchronously perform visibility tests and supply the front end with visible scene objects. The visualization node stores only currently visible objects in its memory, while the scene is distributed among the backend nodes’ memory without redundancy. To efficiently compute the occlusion tests in spite of that each backend node stores only a fraction of the original geometry, we complete the scene by adding highly simplified versions of the objects stored on other nodes. We test our system with 15 backend nodes. It is able to render a ≈ 350,M polygons (≈ 8.5,GiB) large aircraft model with 20, to 30,fps and thus allows a walk-through in real-time. }}, author = {{Suess, Tim and Koch, Clemens and Jähn, Claudius and Fischer, Matthias and Meyer auf der Heide, Friedhelm}}, booktitle = {{Advances in Visual Computing}}, isbn = {{9783642331787}}, issn = {{0302-9743}}, pages = {{502--512}}, title = {{{Asynchronous Occlusion Culling on Heterogeneous PC Clusters for Distributed 3D Scenes}}}, doi = {{10.1007/978-3-642-33179-4_48}}, volume = {{7431}}, year = {{2012}}, } @phdthesis{14002, author = {{Rautenberg, Jens}}, keywords = {{akustische Wellenleiter, Kunststoffe, Materialdatenbestimmung, Transmissionsmessung}}, publisher = {{Elektrotechnik}}, title = {{{Ein wellenleiterbasiertes Verfahren zur Bestimmung von Materialdaten für die realitätsnahe Simulation von Schallausbreitungsphänomenen am Beispiel stark absorbierender Kunststoffe}}}, year = {{2012}}, } @article{14003, abstract = {{Das Spektrum akustischer Wellenleiter zur Flüssig-keitscharakterisierung reicht von der Seismologie und Geophysik mit Wellenleiterdimensionen von einigen km über die zerstörungsfreie Prüfung bis hin zur Prozessmesstechnik mit Sensordimensio-nen von wenigen mm. In diesem Beitrag wird ein phänomenologischer Weg zur Klassifizierung der Wellenleiter entwickelt, wobei stets die Oberflä-chenauslenkungen an der Wellenleitergrenze und die Anzahl der an der Wellenausbreitung beteiligten Moden Berücksichtigung finden. Im weiteren Verlauf werden Möglichkeiten zur Modellierung, Simulation und Messung multimodaler Wellenausbreitung im akustischen Wellenleiter gezeigt.}}, author = {{Rautenberg, Jens and Bause, Fabian and Henning, Bernd}}, journal = {{Technisches Messen}}, number = {{3}}, pages = {{135--142}}, title = {{{Geführte akustische Wellen zur Flüssigkeitscharakterisierung}}}, volume = {{79}}, year = {{2012}}, } @inproceedings{14004, abstract = {{Es wird ein Wellenleiter basiertes Messsystem vorgestellt, mit dem anhand einer einzigen Transmissionsmessung alle Daten bestimmt werden können, die zur Simulation von Schallausbreitungsphänomenen in stark absorbierenden und schwach anisotropen Materialien erforderlich sind. Auf diese Weise ist es fortan möglich die akustischen Kenngrößen (winkel- und frequenzabhängige Schallgeschwindigkeiten und frequenzabhängige Absorption) verschieden konditionierter Materialproben (Temperatur, Feuchtigkeit, Alter) simultan zu erfassen. Genutzt wird dazu die mehrmalige Modekonversion an den Mantelflächen eines hohlzylindrischen akustischen Wellenleiters, wonach ein Empfangssignal mehrere Signalgruppen aufweist, deren absolute Laufzeit, Laufzeitdifferenzen und Amplituden in Abhängigkeit der Materialkenngrößen stark variieren. Grundlegend für die realisierte und in diesem Beitrag beschriebene inverse Bestimmung der akustischen Kenngrößen ist ein ganzheitliches Modell der Schallanregung, -ausbreitung und -detektion, welches die schnelle Berechnung der Empfangssignale erlaubt. Die gezielte Variation der Modell-Eingangsgrößen führt schließlich zu einer bestmöglichen Übereinstimmung zwischen berechneten und gemessenen Empfangssignalen, sodass die final angesetzten Modell-Eingangsgrößen eine gute Approximation der gesuchten materialspezifischen akustischen Kenngrößen darstellen. Im Rahmen dieses Beitrags werden der Messaufbau, wesentliche Teile der Modellierung sowie die grundätzliche Vorgehensweise zur Anwendung der inversen Messmethode gezeigt. Anhand gemessener, berechneter und mittels Finiter Elemente Methode simulierter Signale wird das Verfahren für einen Werkstoff, spritzgegossenes Polypropylen, demonstriert.}}, author = {{Rautenberg, Jens and Bause, Fabian and Henning, Bernd}}, editor = {{Service GmbH, AMA}}, isbn = {{978-3-9813484-0-8}}, location = {{Nürnberg}}, pages = {{332--343}}, title = {{{Messsystem zur Bestimmung akustischer Kenngrößen stark absorbierender, transversal isotroper Kunststoffe}}}, year = {{2012}}, } @inproceedings{14008, abstract = {{Computer aided simulation of guided acoustic waves in single- or multilayered waveguides is an essential tool for several applications of acoustics and ultrasonics (i.e. pipe inspection, noise reduction). To simulate wave propagation in geometrically simple waveguides (plates or rods), one may employ the analytical global matrix method [1]. This requires the computation of all roots of the determinate of a certain submatrix. The evaluation of all real or even complex roots is actually the methods most concerning restriction. Previous approaches base on so called mode-tracers which use the physical phenomenon that solutions (roots) appear in a certain pattern (waveguide modes) and thus use known solutions to limit the root finding algorithms searchspace with respect to consecutive solutions. As the limitation of searchspace might be unstable in some cases, we propose to replace the mode-tracer with a suitable version of an interval Newton method based on Intlab [2]. To apply this interval based method, we extended the interval and derivative computation provided by Intlab such that corresponding information is also available for Bessel functions used in the circular model (rods) of acoustic waveguides. We present numerical results of a simple acoustic waveguide and discuss extensions required for more realistic scenarios.}}, author = {{Walther, Andrea and Bause, Fabian and Henning, Bernd}}, location = {{Darmstadt}}, title = {{{Computing roots for the analytic modeling of guided waves in acoustic waveguides}}}, year = {{2012}}, } @inproceedings{22164, abstract = {{Generative production techniques have the advantage of manufacturing parts via an additive process without needing a forming tool. One of these additive manufacturing technologies is "Fused Deposition Modeling" (FDM). It is one of the most used additive manufacturing processes to produce prototypes and end-use parts. From a 3D-CAD data set, components and assemblies are manufactured out of thermoplastic material layer by layer by means of an additive process. An extrusion head deposits the molten thermoplastic filament to create each layer with a particular tool path. Due to the thermal fusion the material bonds with the layer beneath and solidifies. Thus a permanent bonding of two layers is formed. In this paper the mechanical data of parts, manufactured with the system Fortus 400mc from Stratasys with the material Ultem*9085 are presented. Tensile and flexural tests according to both, the ASTM and the ISO standard, are conducted. Test specimens are generated with the standard parameters of the native software in different build directions. The tests show different strength and strain characteristics that depend on the given structure as a result of the build direction. Furthermore tensile specimens according to the ASTM standard are generated with changed parameters of the native software to increase the mechanical strength properties. The results are compared to injection molded strength properties.}}, author = {{Bagsik, A. and Schöppner, Volker and Klemp, E.}}, booktitle = {{1st International Conference on Thermo-Mechanically Graded Materials}}, isbn = {{9783942267588}}, pages = {{129--134}}, title = {{{Tensile and Flexural Properties of Fused Deposition Modeling Parts Manufactured with ULTEM*9085}}}, volume = {{1}}, year = {{2012}}, } @inproceedings{22024, abstract = {{Generative production techniques have the advantage of manufacturing parts via an additive process without needing a forming tool. One of these additive manufacturing technologies is “Fused Deposition Modeling” (FDM). It is one of the most used additive manufacturing processes to produce prototypes and end-use parts. From a 3D-CAD data set, components and assemblies are manufactured out of thermoplastic material layer by layer by means of an additive process. An extrusion head deposits the molten thermoplastic filament to create each layer with a particular tool path. In this paper the mechanical data of parts, manufactured with the system Fortus 400mc from Stratasys with the material Ultem*9085 are presented. Tensile specimens are generated with the standard parameters as well as with changed parameters of the native software to analyze the influence of these parameters on the mechanical strength properties. The tensile tests show different strength and strain characteristics that depend on the given structure and as a result of the build direction. Furthermore the toolpath parameters have an effect on the strength characteristics and the break behavior. In addition, tensile specimens are tested under the influence of different temperatures and after a thermal cycling. }}, author = {{Bagsik, A. and Schöppner, Volker and Klemp, E.}}, booktitle = {{5th International Conference on Polymer and Mould Innovations}}, pages = {{266--272}}, publisher = {{Centre for Polymer and Material Technology, Univ. College, Ghent Univ.}}, title = {{{Extensive Analysis of the mechanical strength properties of Fused Deposition Modeling Parts manufactured with ULTEM 9085}}}, doi = {{https://www.tib.eu/de/suchen/id/TIBKAT%3A756276616}}, volume = {{5}}, year = {{2012}}, } @inproceedings{29527, author = {{Hassan, Bassem and Wassmann, Helene and Klaas, Alexander and Kessler, Jan Henning}}, booktitle = {{Proceedings of the 2012 Emerging M&S Applications in Industry & Academia Symposium, Spring Simulation Multiconference}}, title = {{{Cascaded Heterogeneous Simulations for Analysis of Mechatronic Systems in Large Scale Transportation Scenarios}}}, year = {{2012}}, } @inproceedings{28640, author = {{Hassan, Bassem and Wassmann, Helene and Klaas, Alexander and Kessler, Jan Henning}}, booktitle = {{Proceedings of the 2012 Emerging M&S Applications in Industry & Academia Symposium, Spring Simulation Multiconference}}, title = {{{Cascaded Heterogeneous Simulations for Analysis of Mechatronic Systems in Large Scale Transportation Scenarios}}}, year = {{2012}}, } @inproceedings{25810, abstract = {{The analysis of production systems by the use of discrete, event-based simulation is widely used and accepted as decision support method. It aims either at the comparison of competitive designs or the identification of a “best possible” configuration of the simulation model. Here, combinatorial techniques of simulation and optimization methods support the user in finding optimal solutions, which typically result in long computation times and though often prohibit a practical application in today’s industry. This paper presents a fast converging procedure as a combination of a swarm heuristic, namely the particle swarm optimization, and the material flow simulation to close this gap. Faster convergence is realized by a specific extension of classic PSO implementations. First results show the applicability with a simulation reference model. }}, author = {{Laroque, Christoph and Pater, Jan-Patrick}}, isbn = {{978-1-61208-234-9}}, pages = {{50--57}}, title = {{{An Automatic Approach for Parameter Optimization of Material Flow Simulation Models based on Particle Swarm Optimization}}}, year = {{2012}}, } @inproceedings{25809, author = {{Laroque, Christoph and Klaas, Alexander and Fischer, Jan-Hendrik and Kuntze, Mathis}}, booktitle = {{Proceedings of the 2012 Winter Simulation Conference}}, title = {{{Fast Converging, Automated Experiment Runs for Material Flow Simulations Using Distributed Computing and Combined Metaheuristics}}}, year = {{2012}}, } @inproceedings{25815, author = {{Renken, Hendrik and Eichert, Felix Alexander and Brandt, Sascha and Klaas, Alexander}}, publisher = {{ASME}}, title = {{{Visualization and Collaborative Editing of Simulation Models With Heterogeneous Clients - Implemented Into the Simulator d3fact}}}, volume = {{2}}, year = {{2012}}, } @inproceedings{25818, author = {{Fischer, Jan-Hendrik and Delius, Robin and Horstkemper, Dennis and Laroque, Christoph}}, title = {{{Comparing a hybrid simulation & optimization approach with a purely stochastic optimization to increase the robustness of production plans}}}, year = {{2012}}, } @article{25821, author = {{Laroque, Christoph and Delius, Robin and Fischer, Jan-Hendrik}}, journal = {{International Journal on Advances in Systems and measurements}}, title = {{{Increase of robustness in production plans using a hybrid optimization and simulation approach}}}, year = {{2012}}, } @inproceedings{25826, author = {{Hassan, Bassem and Wassmann, Helene and Klaas, Alexander and Kessler, Jan Henning}}, booktitle = {{Proceedings of the 2012 Emerging M&S Applications in Industry & Academia Symposium, Spring Simulation Multiconference,}}, title = {{{Cascaded Heterogeneous Simulations for Analysis of Mechatronic Systems in Large Scale Transportation Scenarios}}}, year = {{2012}}, } @inproceedings{25828, author = {{Klingebiel, Katja and Winkler, Matthes and Klaas, Alexander and Laroque, Christoph}}, booktitle = {{Proceedings of the 2012 Emerging M&S Applications in Industry & Academia Symposium, Spring Simulation Multiconference}}, title = {{{A Cross-Level Approach To Planning Changeability in Distribution Systems}}}, year = {{2012}}, } @proceedings{25830, editor = {{Laroque, Christoph and Himmespach, J and Pasupathy, R and Rose, O and Uhrmacher, A. M}}, title = {{{Proceedings of the 2012 Winter Simulation Conference}}}, year = {{2012}}, } @inbook{26695, abstract = {{The Unified Modeling Language (UML) is now widely accepted by the software community. More recently, UML has attracted attention as a unification language for systems description combining both hardware and software components. First, it has been recognized that electronic systems design can no longer be seen as an isolated hardware design activity. In addition, recent advances in tools supporting high level hardware synthesis from electronic system level languages, which are predominantly based on C/C++, open new perspectives for automatic code generation from UML models and opportunities to enhance the link between a high level specification and a concrete hardware/software implementation. Finally, UML has become a general purpose language which can be customized for specific purposes, such as the modelization of electronic systems. This chapter presents recent advances of the UML language applied to System-on-Chip (SoC) and hardware-related embedded systems design. In particular, several examples of specific UML customizations (UML profiles) relevant for SoC design are summarized. Various approaches associating UML with existing hardware/software design languages are presented. The question of tool support and association with well-known simulation environments, such as MATLAB/Simulink, is addressed as well. A concrete example of a UML profile for hardware/software co-modeling and code generation for hardware/software co-simulation is presented in more details for illustration purposes.}}, author = {{Vanderperren, Yves and Müller, Wolfgang and He, Da and Mischkalla, Fabian and Dahaene, Wim}}, booktitle = {{Design Technology for Heterogeneous Embedded Systems}}, editor = {{Nicolescu, Gabriela and O'Connor, Ian and Piguet, Christian}}, isbn = {{978-94-007-1125-9}}, pages = {{13--39}}, publisher = {{Springer Verlag}}, title = {{{Extending UML for Electronic Systems Design: A Code Generation Perspective}}}, year = {{2012}}, } @inproceedings{35269, author = {{Magyar, Balázs and Sauer, B and Horák, P}}, location = {{Ostfildern}}, publisher = {{Technische Akademie Esslingen}}, title = {{{Simulation and Experimental Analysis of Mixed Lubrication of K Type Worm Gear Drives}}}, year = {{2012}}, }