@inproceedings{9521, author = {{Littmann, Walter and Hemsel, Tobias and Wallaschek, Jörg}}, booktitle = {{Proceedings of the 18th International Congress on Acoustics}}, pages = {{2889--2892}}, title = {{{Design criteria for piezoelectric transformers}}}, volume = {{4}}, year = {{2004}}, } @inproceedings{9522, author = {{Mracek, Maik and Wallaschek, Jörg and Hemsel, Tobias}}, booktitle = {{Proceedings of the 18th International Congress on Acoustics}}, pages = {{417--420}}, title = {{{Self configuration of miniature ultrasonic linear motors}}}, year = {{2004}}, } @inproceedings{9523, abstract = {{During operation, the rotating blades of a gas turbine are subjected to centrifugal forces as well as fluctuating gas forces, resulting in blade vibrations. In addition to material damping, aerodynamical and blade root damping, underplatform dampers are widely used to increase the amount of damping and to decrease blade vibration amplitudes. The friction forces generated by the relative displacements between the underplatform damper and the blade platforms provide a significant amount of energy dissipation. In practice, a number of different underplatform damper designs are applied. Basically, these are wedge dampers with flat contact areas, cylindrical dampers with curved surfaces or asymmetrical dampers with both flat contact surfaces on one side and curved contact surfaces on the other. The latter damper type combines the advantages of both the wedge and the cylindrical damper by preventing the damper from pure rolling on the one hand as it has been observed for cylindrical dampers and on the other hand, avoiding a diverged plane area contact in case of a wedge damper, causing a damper lift-off. This paper will focus on the investigation of cylindrical and asymmetrical underplatform dampers. A comparison between measurements of rotating assemblies in Siemens PG gas turbines (V84.2, V64.3A and V94.3A(2)) under test and real operating conditions with cylindrical and asymmetrical underplatform dampers and the predictions of the developed theoretical model are presented. Special attention is paid to the frequency shift due to the application of an underplatform damper, since in particular for stationary gas turbines, in addition to the amplitude reduction, the accurate prediction of the resonance frequency is of major interest. Copyright {\copyright} 2004 by ASME}}, author = {{Panning, Lars and Popp, Karl and Sextro, Walter and Götting, Florian}}, booktitle = {{Proceedings of ASME TURBO Expo, Power for Land, Sea, and Air}}, keywords = {{Dampers, Gas turbines}}, number = {{GT2004-53316}}, pages = {{269--280}}, title = {{{Asymmetrical Underplatform Dampers in Gas Turbine Bladings: Theory and Application}}}, doi = {{10.1115/GT2004-53316}}, volume = {{6}}, year = {{2004}}, } @inproceedings{9524, author = {{Fu, Bo and Hemsel, Tobias and Wallaschek, Jörg}}, booktitle = {{Proceedings of the 18th International Congress on Acoustics, ICA}}, pages = {{4--9}}, title = {{{Model-based Diagnosis for Sandwiched Ultrasonic Transducers}}}, year = {{2004}}, } @inproceedings{33881, author = {{Tröster, Thomas and Rostek, W.}}, booktitle = {{Neuere Entwicklungen in der Blechumformung : [Vortragstexte zur Veranstaltung Internationale Konferenz "Neuere Entwicklungen in der Blechumformung" in Fellbach}}, editor = {{Tröster, Thomas and Rostek, W.}}, location = {{Fellbach}}, number = {{2004}}, pages = {{51--66}}, title = {{{Innovative Warmumformung}}}, year = {{2004}}, } @article{28778, author = {{Mahnken, Rolf}}, issn = {{0045-7825}}, journal = {{Computer Methods in Applied Mechanics and Engineering}}, pages = {{3689--3709}}, title = {{{Void growth in finite deformation elasto-plasticity due to hydrostatic stress states}}}, doi = {{10.1016/j.cma.2003.09.032}}, year = {{2004}}, } @article{28780, author = {{Mahnken, Rolf}}, issn = {{1617-7061}}, journal = {{PAMM}}, pages = {{225--226}}, title = {{{Stress mode dependent weighting functions for simulation of asymmetric creep effects}}}, doi = {{10.1002/pamm.200410094}}, year = {{2004}}, } @inproceedings{21056, author = {{Meschut, Gerson}}, location = {{Stuttgart}}, title = {{{Kleben und Mechanisches Fügen – Verbindungstechniken im Produktlebenszyklus von Leichtbaustrukturen}}}, year = {{2003}}, } @inproceedings{21057, author = {{Amedick, A. and Meschut, Gerson}}, location = {{Bremen}}, title = {{{Fügeverbindungen für Magnesium im Automobilbau aus Sicht der VOLKSWAGEN AG}}}, year = {{2003}}, } @inproceedings{21058, author = {{Friedrich, H. E. and Meschut, Gerson}}, booktitle = {{DVS-Berichte, Band 222}}, isbn = {{ISBN 3-87155-680-7}}, location = {{Düsseldorf}}, pages = {{5--10}}, publisher = {{DVS-Verlag GmbH}}, title = {{{Autovision – Zukünftige Werkstoffe und Fügekonzepte im Automobilbau}}}, volume = {{222}}, year = {{2003}}, } @article{21059, author = {{Kläger, O. and Wetter, H. and Meschut, Gerson}}, journal = {{Adhäsion}}, number = {{4}}, pages = {{30--35}}, title = {{{Multi-Material-Design (Teil 1) Thermische Beanspruchung in Lacktrocknungsprozessen}}}, volume = {{47}}, year = {{2003}}, } @article{21060, author = {{Küting, J. and Meschut, Gerson}}, journal = {{Blech Rohre Profile}}, pages = {{33}}, title = {{{Direktverschrauben ohne Vorlochen zur Realisierung einseitig zugänglicher Verbindungen im Karosseriebau}}}, volume = {{02.2003}}, year = {{2003}}, } @article{21061, author = {{Kläger, O. and Wetter, H. and Meschut, Gerson}}, journal = {{Adhäsion}}, number = {{5}}, pages = {{31--34}}, title = {{{Multi-Material-Design (Teil 2) Simulation der thermischen Beanspruchung}}}, volume = {{47}}, year = {{2003}}, } @inproceedings{21146, author = {{Friedrich, H. E. and Meschut, Gerson}}, location = {{Dresden}}, title = {{{Zukünftige Fügekonzepte für Automobilstrukturen in Mischbauweise}}}, year = {{2003}}, } @article{21147, author = {{Gänsicke, T. and Meschut, Gerson}}, journal = {{Schweißen und Schneiden}}, number = {{7}}, pages = {{371--383}}, title = {{{Experimentelle und rechnerische Analyse der Klebschichtbeanspruchung in Verbindungen aus thermisch inkompatiblen Werkstoffen}}}, volume = {{55}}, year = {{2003}}, } @article{21148, author = {{Friedrich, H. E. and Meschut, Gerson}}, journal = {{Stahl}}, pages = {{18--21}}, title = {{{Autovision – Zukünftige Werkstoffe und Fügekonzepte im Automobilbau (Teil 1)}}}, volume = {{4}}, year = {{2003}}, } @techreport{21149, author = {{Ruther, M. and Jost, R. and Freitag, V. and Peitz, V. and Piccolo, S. and Brüdgam, S. and Meschut, Gerson and Küting, J. and Hahn, O. and Timmermann, R.}}, title = {{{Fügesystemoptimierung zur Herstellung von Mischbauweisen aus Kombinationen der Werkstoffe Stahl, Aluminium, Magnesium und Kunststoff}}}, year = {{2003}}, } @inproceedings{21154, author = {{Brüdgam, S. and Meschut, Gerson}}, booktitle = {{Tagungsband zum 10. Paderborner Symposium Fügetechnik „Mechanisches Fügen und Kleben“}}, isbn = {{ISBN 3-9805447-9-6}}, location = {{Paderborn}}, pages = {{1--9}}, title = {{{Mechanisches Fügen und Kleben – Schlüsseltechnologien für die Mischbauweise}}}, year = {{2003}}, } @inproceedings{21155, author = {{Küting, J. and Meschut, Gerson}}, booktitle = {{Tagungsband zum 10. Paderborner Symposium Fügetechnik „Mechanisches Fügen und Kleben“}}, isbn = {{ISBN 3-9805447-9-6}}, location = {{Paderborn}}, pages = {{22--34}}, title = {{{Niet- und Direktverschraubungstechniken für Fahrzeug-strukturen in Mischbauweise}}}, year = {{2003}}, } @inproceedings{21156, author = {{Haldenwanger, H.-G. and Meschut, Gerson and Wetter, H. and Kläger, O.}}, booktitle = {{Tagungsband zum 10. Paderborner Symposium Fügetechnik „Mechanisches Fügen und Kleben“}}, isbn = {{ISBN 3-9805447-9-6}}, location = {{Paderborn}}, pages = {{147--162}}, title = {{{Simulation thermisch beanspruchter Strukturklebungen unter dem Einfluss unterschiedlicher Alpha-Werte in Mischverbindungen}}}, year = {{2003}}, }