Dynamik rotierender Maschinen
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Robust damper design for multiharmonic excitation under flexible operationsAs part of this joint research project funded by AG Turbo, the robustness of underplatform dampers for turbine blades is being investigated with regard to an increasingly broadband frequency spectrum of vibration excitation, e.g. as a result of partial load operation. Design rules for optimized and particularly robust friction dampers are to be developed by enhancing an existing simulation tool with regard to multiharmonic excitations and validating it by means of a realistic experiment under rotation.Led by: Lars Panning-von ScheidtTeam:Year: 2024Funding: AG TurboDuration: 01.10.2023-28.02.2027
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Blade vibration under consideration of variable excitations and geometric mistuningThis project investigates the numerical prediction of blade vibration with different mistuning effects and nonlinearities. In addition to the frequency mistuning in a bladed disk, variable excitation and mistuned blade geometries are also taken into account. If the considered mistuning phenomena are combined with other effects such as speed variability and nonlinear couplings, not only those effects themselves but also their interactions can be analysed.Led by: Lars Panning-von ScheidtTeam:Year: 2023Funding: BMWK/AiFDuration: 01.08.2021-31.03.2023
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Prediction and validation of nonlinear friction damping during blade vibrationsAs part of this joint research project funded by AG Turbo, the prediction of vibration responses is being investigated for turbine blades that are coupled by both underplatform dampers and shrouds. Utilizing a newly designed friction hysteresis test rig and an electromagnetic excitation device, an existing simulation tool for the prediction of nonlinear vibration amplitudes with simultaneous coupling via the different contact mechanisms will be validated.Led by: Lars Panning-von ScheidtTeam:Year: 2023Funding: AG TurboDuration: 01.03.2019-31.12.2023
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Nonlinear aeroelasticity and transient multiresonancesThe calculation tool RAMBO was developed as a result of various studies in the Collaborative Research Center "Regeneration of Complex Capital Goods". It can be applied to calculate the vibrations of linear, mistuned turbine stages, taking into account, for example, aerodynamic damping. In this transfer project, the application of the tool will be tested on a real structure. It will be compared with nonlinear calculations.Led by: Lars Panning-von ScheidtTeam:Year: 2023Funding: DFGDuration: 01.01.2023-31.12.2026
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Model-based Vibrational AnalysisThe regular maintenance and overhaul of jet engines is a crucial part to keep the aircraft safe and efficient. During this inspection process it may happen that large vibrational amplitudes occur and the causes for the oscillations have to be found quickly and reliably. A simulation environment is being developed at the IDS to help with the diagnostic.Led by: Lars Panning-von ScheidtTeam:Year: 2023Duration: 01.07.2023-31.12.2025
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Experimental and numerical investigation of the vibration behavior of coupled bladesIn the project funded by AG Turbo, the friction damping of turbine blades with nonlinear shroud coupling for a variable operating mode is being investigated. For this purpose, the blading is excited at different speeds and different excitation force levels. Contact properties are varied by varying the oversize of the shrouds and their influence on the damping for several operating points is investigated experimentally and numerically.Led by: Lars Panning-von ScheidtTeam:Year: 2022Funding: AG TurboDuration: 01.09.2022-28.02.2026
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Rotations- und StandversucheTEST: Eine besondere Kompetenz des IDS liegt in der Entwicklung innovativer Dämpfungskonzepte und deren experimentelle Validierung. Für Untersuchungen des Dämpfungseinflusses von Turbinenschaufeln wurden am IDS Rotationsprüfstände sowie Standversuche entwickelt. An den Rotationsprüfstanden können Schaufelschwingungen unter dem Einfluss von Fliehkrafteffekten untersucht werden. Der Einsatz von Standversuchen ermöglicht bereits mit einem reduzierten Versuchsaufwand die Identifizierung charakteristischer Dämpfungseigenschaften.Led by: Dr.-Ing. Lars Panning-von-ScheidtYear: 2019
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Kontaktmechanik und Reibung
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Pattern Mechanics in Lab 2The aim of this research project is to use new test methods to describe in detail the factors influencing contact between car tires and a hard-pressed snow track, on ice, wet ground and asphalt. For this purpose, the test rig developed at IDS in the previous project " Realistische Profilklotzmechanik im Labor" will be used to specifically investigate various hypotheses on force transmission between the tire tread block and the road surface using specially designed tests.Led by: Matthias WangenheimYear: 2023Duration: 01.04.2022-31.03.2023
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Innovation Ecosystem to Accelerate the Industrial Uptake of Advanced Surface Nano-Technologies (NewSkin)The Institute of Dynamics and Vibrations (IDS) is working as part of the EU-funded project “NewSkin” on the creation of an Open Innovation Test Bed (OITB). The aim of this OITB is to accelerate the industrial uptake of modified surfaces by providing the necessary technologies, resources, and services for the efficient and cost-effective production of components with nano-enabled surfaces.Led by: Dr.-Ing. Matthias WangenheimTeam:Year: 2020Funding: EUDuration: 01.04.2020-31.03.2024
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Nichtlineare Strukturdynamik
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Vibration Damping with Shunted Reluctance Force DampersWithin the Deutsche Forschungsgesellschaft (DFG) funded project, shunted reluctance force dampers are investigated. Reluctance force dampers work contactless and without energy supply offering various advantages, while their nonlinear behavior requires a comparatively high modeling effort. The aims of the project are to improve the calculation of the damping effect in terms of accuracy and computing time on one hand and to investigate their suitability for various damping applications on the other hand.Led by: Dr.-Ing. Sebastian TatzkoTeam:Year: 2023Duration: 2023-31.08.2025
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Influencing the dynamic properties of metamaterial structuresIn structural dynamics, metamaterials are components whose geometry can be cleverly designed to achieve special dynamic properties such as stop bands (bandgaps). By applying resonators to components, vibrations of the host structure are reduced in pre-designed frequency ranges. This concept can be used, for example, as an inverse mechanical bandpass filter in transmission paths.Led by: Sebastian TatzkoTeam:Year: 2022Funding: DFGDuration: 01.04.2022-31.03.2025
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[uncategorized]
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Multi Resonances and Multi Limit CyclesThe project funded by AG Turbo is concerned the non-linear interactions between different modes in resonance with external excitation (multi resonances) and self-excitation (multi limit cycles) of turbine blades. An existing concept for a test rig is being implemented and various multi-resonances can be measured. The knowledge gained from this experiment is used in the subsequent design of a test rig for multi limit cycles. In addition, the setup of a test rig for multi resonances in cyclic symmetric structures is designed in collaboration with the participating industrial partner (MTU).Led by: Lars Panning-von ScheidtTeam:Year: 2024Duration: 01.08.2020-31.07.2024
