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Dissertation
Ein empirischer Ansatz zur Beschreibung der Horizontaltragfähigkeit gemauerter Wandscheiben unter Berücksichtigung der Interaktion innerhalb der Gebäudestruktur
(kassel university press, 2011-05-13)
Mauerwerksbauten mit geringen Schubwandquerschnitten sind auf Grund der erhöhten Einwirkungen nach DIN 4149:2005-04 in Gebieten geringer Seismizität nicht mehr nachzuweisen. Durch Großversuche, die innerhalb eines europäischen Forschungsvorhabens durchgeführt wurden, konnte jedoch die Tragfähigkeit solcher Gebäude unter Beweis gestellt werden.
Auf Grundlage von 54 an der Universität Kassel durchgeführten Wandversuchen an geschosshohen Mauerwerksscheiben wird der Einfluss von Randbedingungen des Gesamtgebäudes ...
Buch
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8th GACM Colloquium on Computational Mechanics For Young Scientists From Academia and Industry
(kassel university press, 2019)
This conference book contains papers presented at the 8th GACM Colloquium on Computational Mechanics for Young Scientists from Academia and Industry. The conference was held from August 28th – 30th, 2019 in Kassel, hosted by the Institute of Mechanics and Dynamics of the department for civil and environmental engineering and by the chair of Engineering Mechanics / Continuum Mechanics of the department for mechanical engineering of the University of Kassel.
The aim of the conference is, to bring together young scientits ...
Buch
PV-Stromrichter höherer Leistung für 1.500 V Systemspannung
(kassel university press, 2016)
Die Überdimensionierung der installierten PV-Modulleistung im Vergleich zur Wechselrichterleistung, als auch die Preisentwicklung von Komponenten führt dazu, dass Hersteller von der sonst üblichen 1.000V Systemspannung abrücken und den Einsatz von 1.500V Systemen prüfen. Die vorliegende Dissertation beschäftigt sich aus diesem Grund mit den hieraus resultierenden technischen Problemen und erarbeitet Lösungen für eine technische Realisierung.Neben Grundlagen zu Wechselrichtersystemen werden in dieser Arbeit Bewertungs- ...
Buch
Investigation on Performance Advantage of Functionally Integrated Magnetic Components in Decentralised Power Electronic Applications
(kassel university press, 2017)
The functional integration of magnetic components is a known technique in order to enable high power densities for power electronic converters. Magnetic components are mandatory in many power electronic converters and many topologies demand more than one magnetic component. Therefore, the functional integration of magnetic components allows realising several magnetic functions within one component. This technique promises lower total size, losses and costs without switching frequency increase. There are several ...
Buch
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Zum Verformungs- und Ermüdungsverhalten von Elektroblech
(kassel university press, 2019)
In dieser Arbeit wird das Verformungs- und Ermüdungsverhalten von nichtkornorientiertem, hoch siliziumhaltigem Elektroblech für den Einsatz in der Elektromobilität untersucht.
Buch
Three-Dimensional Flow in the Root Region of Wind Turbine Rotors
(kassel university press, 2018)
This book presents the state of the art in the analyses of three-dimensional flow over rotating wind turbine blades. Systematic studies for wind turbine rotors with different sizes were carried out numerically employing three different simulation approaches, namely the Euler, URANS and DDES methods. The main mechanisms of the lift augmentation in the blade inboard region are described in detail. The physical relations between the inviscid and viscous effects are presented and evaluated, emphasizing the influence of ...
Buch
Investigation of Reliability Aspects of Power Semiconductors in Photovoltaic Central Inverters for Sunbelt Regions
(kassel university press, 2018)
High reliability and system lifetimes in the range of 30 years are essential for renewable energy systems such as photovoltaic power plants to minimise costs for the generated electric energy. At the same time such systems are used in regions with high solar irradiance and also harsh environmental conditions. Therefore, designs for photovoltaic inverters need to meet not only the key design criteria of high conversion efficiency but also need to be very robust and at the same time meet challenging cost targets. In ...
Buch
Run-time Reconfigurable Constant Multiplication on Field Programmable Gate Arrays
(kassel university press, 2017)
This book addresses the question how run-time reconfigurable constant multipliers (RCMs) can be efficiently implemented on field programmable gate arrays (FPGAs). RCMs calculate the multiplication of an input number by one out of several constants which can be selected during run-time. This is important as constant multiplication is an essential operation in digital signalprocessing (DSP) applications. The evaluation of RCMs is done by considering reconfiguration using reconfigurable look-up tables (LUTs),reconfiguration ...
Buch
Hierachical and Cooperative Control of Complex Distributed Systems
(kassel university press, 2018)
In this thesis, a theory of hierarchical and cooperative feedback control for spatially distributed, physically interconnected systems is developed. A particular requirement is that the resulting control laws are suitable for a distributed implementation, meaning that the subsystems are equipped with local controllers and exchange information via a communication network. Distributed control schemes steadily gain practical significance, since an ever increasing number of technical systems, like power networks or ...
Buch
Residual stress analysis in polymer materials using the hole drilling method - basic principles and applications
(kassel university press, 2019)
Residual stresses are mechanical stresses in materials free of external loads, moments or temperature gradients. These residual stresses form a self-equilibrated and inhomogeneous stress state, which is then superimposed upon external stresses applied to the material. A distinction is made between macroscopic residual stresses, which are comparable to loading stresses, and microscopic residual stresses, which take the inhomogeneous microstructure of materials into account. In polymer materials, residual stresses are ...