@inproceedings{KraftMeyerNagl2002, author = {Kraft, Bodo and Meyer, Oliver and Nagl, Manfred}, title = {Graph technology support for conceptual design in civil engineering}, isbn = {3-18-318004-9}, year = {2002}, abstract = {In: Advances in intelligent computing in engineering : proceedings of the 9.International EG-ICE Workshop ; Darmstadt, (01 - 03 August) 2002 / Martina Schnellenbach-Held ... (eds.) . - D{\"u}sseldorf: VDI-Verl., 2002 .- Fortschritt-Berichte VDI, Reihe 4, Bauingenieurwesen ; 180 ; S. 1-35 The paper describes a novel way to support conceptual design in civil engineering. The designer uses semantical tools guaranteeing certain internal structures of the design result but also the fulfillment of various constraints. Two different approaches and corresponding tools are discussed: (a) Visually specified tools with automatic code generation to determine a design structure as well as fixing various constraints a design has to obey. These tools are also valuable for design knowledge specialist. (b) Extensions of existing CAD tools to provide semantical knowledge to be used by an architect. It is sketched how these different tools can be combined in the future. The main part of the paper discusses the concepts and realization of two prototypes following the two above approaches. The paper especially discusses that specific graphs and the specification of their structure are useful for both tool realization projects.}, subject = {CAD}, language = {en} } @inproceedings{Kern2002, author = {Kern, Alexander}, title = {Risikomanagement : Absch{\"a}tzung des Schadensrisikos f{\"u}r bauliche Anlagen - Die neue Vornorm DIN V VDE V 0185 Teil 2 : 2002}, year = {2002}, abstract = {Alle Unternehmen sind vielf{\"a}ltigen Risiken ausgesetzt, die Finanz- und Betriebsbereiche einschließlich Dienstleistungen betreffen k{\"o}nnen. Die Firmen m{\"u}ssen {\"u}blicherweise Risiken eingehen, um im Wettbewerb bestehen zu k{\"o}nnen. Entscheidend ist, dass man sich {\"u}ber die Risiken bewusst ist, diese einsch{\"a}tzen und kontrollieren kann. Falsche Einsch{\"a}tzungen, Vers{\"a}umnisse und Fehlentscheidungen k{\"o}nnen empfindliche finanzielle Sch{\"a}den bis hin zum Totalverlust nach sich ziehen. Ein effektives Risikomanagement ist heute als wichtiger Sicherheitsfaktor anzusehen und sollte zur strategischen Unternehmensf{\"u}hrung geh{\"o}ren. Ein vorausschauendes Risikomanagement beinhaltet, Risiken f{\"u}r das Unternehmen zu kalkulieren. Es liefert Entscheidungsgrundlagen, um diese Risiken zu begrenzen und es macht transparent, welche Risiken sinnvollerweise {\"u}ber Versicherungen abgedeckt werden sollten. Beim Versicherungsmanagement ist jedoch zu bedenken, dass zur Erreichung bestimmter Ziele Versicherungen nicht geeignet sind (z.B. Erhaltung der Lieferf{\"a}higkeit). Eintrittswahrscheinlichkeiten bestimmter Risiken lassen sich durch Versicherungen nicht ver{\"a}ndern. Bei Unternehmen, die mit umfangreichen elektronischen Einrichtungen produzieren oder Dienstleistungen erbringen (und das sind heutzutage wohl die meisten), muss auch das Risiko durch Blitzeinwirkungen besondere Ber{\"u}cksichtigung finden. Dabei ist zu beachten, dass der Schaden aufgrund der Nicht-Verf{\"u}gbarkeit der elektronischen Einrichtungen und damit der Produktion bzw. der Dienstleistung und ggf. der Verlust von Daten den Hardware-Schaden an der betroffenen Anlage oft bei weitem {\"u}bersteigt. Im Blitzschutz gewinnt innovatives Denken in Schadensrisiken langsam an Bedeutung. Risikoanalysen haben die Objektivierung und Quantifizierung der Gef{\"a}hrdung von baulichen Anlagen und ihrer Inhalte durch direkte und indirekte Blitzeinschl{\"a}ge zum Ziel. Seinen Niederschlag hat dieses neue Denken in der neuen deutschen Norm DIN V 0185-2 VDE V 0185 Teil 2 gefunden. Die hier vorgegebene Risikoanalyse gew{\"a}hrleistet, dass ein f{\"u}r alle Beteiligten nachvollziehbares Blitzschutz-Konzept erstellt werden kann, das technisch und wirtschaftlich optimiert ist, d.h. bei m{\"o}glichst geringem Aufwand den notwendigen Schutz gew{\"a}hrleisten kann. Die sich aus der Risikoanalyse ergebenden Schutzmaßnahmen sind dann in den weiteren Normenteilen der neuen Reihe VDE V 0185 detailliert beschrieben.}, language = {de} } @inproceedings{StaatHeitzer2002, author = {Staat, Manfred and Heitzer, Michael}, title = {The restricted influence of kinematic hardening on shakedown loads}, year = {2002}, abstract = {Structural design analyses are conducted with the aim of verifying the exclusion of ratcheting. To this end it is important to make a clear distinction between the shakedown range and the ratcheting range. In cyclic plasticity more sophisticated hardening models have been suggested in order to model the strain evolution observed in ratcheting experiments. The hardening models used in shakedown analysis are comparatively simple. It is shown that shakedown analysis can make quite stable predictions of admissible load ranges despite the simplicity of the underlying hardening models. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis. Both give identical or similar shakedown ranges. Structural shakedown analyses show that the loading may have a more pronounced effect than the hardening model.}, subject = {Biomedizinische Technik}, language = {en} } @inproceedings{DarvenizaFlisowskiKernetal.2002, author = {Darveniza, M. and Flisowski, Z. and Kern, Alexander and Landers, E.-U. and LoPiparo, G. and Mazzetti, C. and Rousseau, A. and Sherlock, J.}, title = {Application problems of the probabilistic approach to the assessment of risk for structures and services}, year = {2002}, abstract = {The paper deals with the development of the probabilistic approach to the assessment of risk due to lightning. Sources of damage, types of damage and types of loss are defined and, accordingly, the procedure for risk analysis and the way of assessment of different risk components is proposed. The way to evaluate the influence of different protection measures (lightning protection system; shielding of structure, cables and equipment; routing of internal wiring; surge protective device) in reducing such probabilities is considered. The paper has been prepared within the framework of the activity of IEC TC81-WG9/CLC TC81-WG4 directed to prepare the draft IEC 62305-2 Risk Management, in cooperation with the Secretary of IEC/CLC TC81.}, language = {en} } @inproceedings{KernKrichel2002, author = {Kern, Alexander and Krichel, Frank}, title = {Considerations about the lightning protection system of mains independent renewable energy hybrid-systems - practical experiences}, year = {2002}, abstract = {In the paper a lightning protection design concept for renewable energy hybrid-systems without power mains connection is described. Based on a risk analysis protection measures against direct strikes and overvoltages are shown in an overview. The design concept is realized exemplarily for the hybrid-system VATALI on the Greek island Crete. VATALI, not lightning protected at that time, was a victim of a lightning strike in the year 2000 causing destructions and damages of some mechanical and electrical components with costs of approx. 60.000 €. The hardware costs for the protection measures were about 15.000 €: about 50\% of the costs are due to protection measures against direct strikes, 50\% are due to overvoltage protection.}, language = {en} } @inproceedings{ZischankHeidlerKernetal.2002, author = {Zischank, Wolfgang J. and Heidler, Fridolin and Kern, Alexander and Metwally, I. A. and Wiesinger, J. and Seevers, M.}, title = {Laboratory simulation of direct lightning strokes to a modelled building - measurement of magnetic fields and induced voltages}, year = {2002}, abstract = {In IEC 61312-2 equations for the assessment of the magnetic fields inside structures due to a direct lightning strike are given. These equations are based on computer simulations for shields consisting of a single-layer steel grid of a given mesh width. Real constructions, however, contain at least two layers of reinforcement steel grids. The objective of this study was to experimentally determine the additional shielding effectiveness of a second reinforcement layer compared to a single-layer grid. To this end, simulated structures were set up in the high current laboratory. The structures consisted of cubic cages of 2 m side length with one or with two reinforcement grids, respectively. The structures were exposed to direct lightning currents representing the variety of anticipated lightning current waveforms. The magnetic fields and their derivatives at several positions inside the structure as well as the voltage between "floor" and "roof" in the center were determined for different current injection points. From these data the improvement of the shielding caused by a second reinforcement layer is derived.}, language = {en} } @inproceedings{DielmannPeters2002, author = {Dielmann, Klaus-Peter and Peters, Bernhard}, title = {Micro Turbine Using Different Gases and Liquid Fuels}, year = {2002}, abstract = {Micro turbine using different gases and liquid fuels}, subject = {Gasturbine}, language = {en} } @inproceedings{Roeth2002, author = {R{\"o}th, Thilo}, title = {Modularisierung in der Karosserie von morgen}, year = {2002}, abstract = {1) Module werden die Fahrzeugplattform und den -aufbau in Zukunft weiterhin und in zunehmendem Maße bestimmen. 2) Neue Module und Modulschnittstellen am Fahrzeug werden {\"u}berdacht und k{\"o}nnen in der Zukunft erwartet werden. 3) Die Wertsch{\"o}pfung und der Entwicklungsumfang wird sich vom OEM zum Modullieferanten verlagern. 4) Modulvergaben werden in der Zukunft noch st{\"a}rker auf Innovation und Kostenreduktion beruhen. 5) Modularisierung des Fahrzeuges heißt ein Aufbrechen der Fahrzeugkarosserie und wird daher von der Beherrschung struktureller Aufgaben sowie der L{\"o}sung der (sichtbaren) Modul{\"u}berg{\"a}nge bestimmt sein. 6) Neben den Systemintegratoren und den Komponentenspezialisten besetzen die Modullieferanten die erste Lieferantenriege. 7) Der Modullieferant wird neben h{\"o}chster Fertigungsexpertise ein hohes Maß an (Teil-)fahrzeug-Know-How und Produktentwickler-mentalit{\"a}t bereitstellen.}, subject = {Karosseriebau}, language = {de} } @inproceedings{ChudobaButenwegKuhlmann2002, author = {Chudoba, Rostislav and Butenweg, Christoph and Kuhlmann, Wolfram}, title = {Technical information system for collaborative material research}, series = {Sixth International Conference on Computational Structures Technology : [Prague, Czech Republic, 4 - 6 September 2002]}, booktitle = {Sixth International Conference on Computational Structures Technology : [Prague, Czech Republic, 4 - 6 September 2002]}, organization = {International Conference on Computational Structures Technology <6, 2002, Prag>}, pages = {1 -- 11}, year = {2002}, language = {en} }