Refine
Year of publication
- 2007 (67) (remove)
Institute
- Fachbereich Bauingenieurwesen (17)
- Fachbereich Elektrotechnik und Informationstechnik (10)
- Fachbereich Maschinenbau und Mechatronik (10)
- Fachbereich Wirtschaftswissenschaften (10)
- Fachbereich Luft- und Raumfahrttechnik (9)
- IfB - Institut für Bioengineering (8)
- Fachbereich Medizintechnik und Technomathematik (4)
- Fachbereich Energietechnik (3)
- ECSM European Center for Sustainable Mobility (1)
- Fachbereich Architektur (1)
Document Type
- Conference Proceeding (67) (remove)
Keywords
- Kanalisation (4)
- Führung (3)
- Leadership (3)
- Finite-Elemente-Methode (2)
- Kanalisierung (2)
- Kanalnetz (2)
- Kanalnetzberechnung (2)
- Kanalsanierung (2)
- Telekommunikationsmarkt (2)
- Wasserbau (2)
- Abdichtung (1)
- Abflussbildung (1)
- Abflussmessung (1)
- Abflusssteuerung (1)
- Abwasser (1)
- Abwasseranlage (1)
- Bemessung (1)
- Coaching (1)
- Communication (1)
- Entwässerung <Bauwesen> (1)
- Erythrozyt (1)
- Exact Ilyushin yield surface (1)
- First Order Reliabiblity Method (1)
- Führungsansätze (1)
- HDTV (1)
- High Definition Media Services (1)
- High Quality Streaming (1)
- Hochwasserschutz (1)
- Hochwasservorsorge (1)
- Hämoglobin (1)
- Kanal (1)
- Kanalbau (1)
- Kanalinspektion (1)
- Kanalnetzmodellierung (1)
- Kommunikation (1)
- Leadership Approaches (1)
- Leadership Theories (1)
- Limit analysis (1)
- Motivation (1)
- Oberflächenabflussmodell (1)
- Parallelisierung (1)
- Provocative Coaching (1)
- Provocative Style (1)
- Provokativer Stil (1)
- Random variable (1)
- Schachterfassung (1)
- Self-Leadership (1)
- Skill Assessment (1)
- Stadtentwässerung (1)
- cytosolic water diffusion (1)
- finite element method (1)
- fluid structure interaction (1)
- hemoglobin dynamics (1)
- shakedown analysis (1)
- verteiltes Rechnen (1)
- vocal fold oscillation (1)
Abstract des Beitrags zum 1. Aachener Softwaretag in der Wasserwirtschaft <1, 2007, Aachen> 1 S. : Bereits seit Jahrzehnten werden verschiedenste Injektions-Verfahren, welche teilweise aus den Vereinigten Staaten lizenziert wurden, in Deutschland angewendet, um Abwasserkanäle zu ertüchtigen. Die Resultate sind teilweise sehr umstritten, nicht zuletzt aufgrund unzureichender Materialeigenschaften in den Anfangsjahren der Anwendung. Viele Methoden sind darüber völlig aus dem Gebrauch gekommen und haben manchmal das ganze Verfahrensprinzip in Verruf gebracht. Mittlerweile wurden sowohl Verfahren als auch Materialien weiterentwickelt und sind nun in der Lage auch den aktuellen strengen und praxisnahen Testverfahren mittels Säuleninjektionsversuchen zur Beurteilung Umweltverträglichkeit zu genügen. Es wird ein kurzer Überblick über die derzeit am Markt befindlichen/üblichen Regelwerke, Verfahren und Materialien gegeben und die Grenzen und Möglichkeiten im Rahmen der Kanalsanierung aufgezeigt.
A procedure for the evaluation of the failure probability of elastic-plastic thin shell structures is presented. The procedure involves a deterministic limit and shakedown analysis for each probabilistic iteration which is based on the kinematical approach and the use the exact Ilyushin yield surface. Based on a direct definition of the limit state function, the non-linear problems may be efficiently solved by using the First and Second Order Reliabiblity Methods (Form/SORM). This direct approach reduces considerably the necessary knowledge of uncertain technological input data, computing costs and the numerical error. In: Computational plasticity / ed. by Eugenio Onate. Dordrecht: Springer 2007. VII, 265 S. (Computational Methods in Applied Sciences ; 7) (COMPLAS IX. Part 1 . International Center for Numerical Methods in Engineering (CIMNE)). ISBN 978-1-402-06576-7 S. 186-189
Proceedings of the International Conference on Material Theory and Nonlinear Dynamics. MatDyn. Hanoi, Vietnam, Sept. 24-26, 2007, 8 p. In this paper, a method is introduced to determine the limit load of general shells using the finite element method. The method is based on an upper bound limit and shakedown analysis with elastic-perfectly plastic material model. A non-linear constrained optimisation problem is solved by using Newton’s method in conjunction with a penalty method and the Lagrangean dual method. Numerical investigation of a pipe bend subjected to bending moments proves the effectiveness of the algorithm.
Flow separation is a phenomenon that occurs in all kinds of supersonic nozzles sometimes during run-up and shut-down operations. Especially in expansion nozzles of rocket engines with large area ratio, flow separation can trigger strong side loads that can damage the structure of the nozzle. The investigation presented in this paper seeks to establish measures that may be applied to alter the point of flow separation. In order to achieve this, a supersonic nozzle was placed at the exit plane of the conical nozzle. This resulted in the generation of cross flow surrounding the core jet flow from the conical nozzle. Due to the entrainment of the gas stream from the conical nozzle the pressure in its exit plane was found to be lower than that of the ambient. A Cold gas instead of hot combustion gases was used as the working fluid. A mathematical simulation of the concept was validated by experiment. Measurements confirmed the simulation results that due to the introduction of a second nozzle the pressure in the separated region of the conical nozzle was significantly reduced. It was also established that the boundary layer separation inside the conical nozzle was delayed thus allowing an increased degree of overexpansion. The condition established by the pressure measurements was also demonstrated qualitatively using transparent nozzle configurations.