Research Projects »Dynamics of Rotating Machinery«

Dynamik rotierender Maschinen

• Robust damper design for multiharmonic excitation under flexible operations

  As 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 Scheidt

  Team: Katharina Brinkmann

  Year: 2024

  Funding: AG Turbo

  Duration: 01.10.2023-28.02.2027
• Prediction and validation of nonlinear friction damping during blade vibrations

  As 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 Scheidt

  Team: Katharina Brinkmann

  Year: 2023

  Funding: AG Turbo

  Duration: 01.03.2019-31.12.2023
• Nonlinear aeroelasticity and transient multiresonances

  The 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 Scheidt

  Team: Anna Lefken (Dynamics of Rotating maschinery)

  Year: 2023

  Funding: DFG

  Duration: 01.01.2023-31.12.2026
• Model-based Vibrational Analysis

  The 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 Scheidt

  Team: Martin Paehr (Dynamics of Rotating Maschinery)

  Year: 2023

  Duration: 01.07.2023-31.12.2025
• Blade vibration under consideration of variable excitations and geometric mistuning

  This 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 Scheidt

  Team: Yue Xiao (Dynamik rotierender Maschinen)

  Year: 2023

  Funding: BMWK/AiF

  Duration: 01.08.2021-31.03.2023
• Experimental and numerical investigation of the vibration behavior of coupled blades

  In 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 Scheidt

  Team: Florian Jäger

  Year: 2022

  Funding: AG Turbo

  Duration: 01.09.2022-28.02.2026
• Rotations- und Standversuche

  TEST: 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-Scheidt

  Year: 2019