T9 – Collaborative Research Centre 871: Regeneration of Complex Capital Goods

T9 - Nonlinear aeroelasticity and Transient Multiresonances

The SFB 871 Transfer Project T9 is being carried out in collaboration with the Institute for Dynamics and Vibrations and MTU Aero Engines. The project brings advanced aeroelastic methods into industrial practice. A bladed turbine stage is being investigated experimentally and numerically under realistic operating conditions. An acoustic excitation system and a tip timing system are used to excite and record the nonlinear vibration response of the blades.

Motivation

The data is used to validate and further develop reduced-order models with regard to detuning, multi-resonances, and transient resonance passages. The results help identify when linearized models are sufficient and when computationally intensive nonlinear contact modeling is required. The results provide industry-relevant guidelines and data sets that help reduce safety margins and thus improve the efficiency of future turbomachinery while ensuring structural integrity.

Project Partners

MTU Aero Engines AG

Responsible Institutes

The project is managed by the Institute of Turbomachinery and Fluid-Dynamics and the Institute of Dynamics and Vibration Research