TY - JOUR

T1 - Measured and Simulated Forced Response of a Rotating Turbine Disk With Asymmetric and Cylindrical Underplatform Dampers

AU - Hoffmann, Thomas

AU - Panning-von Scheidt, Lars

AU - Wallaschek, Jörg

N1 - Funding Information: The investigations were conducted as part of the joint research program COOREFlex-turbo in the frame of AG Turbo. The work was supported by the Bundesministerium fur Wirtschaft und Technologie (BMWi) as per resolution of the German Federal Parliament under grant number 03ET7041 L. The authors

PY - 2020/5

Y1 - 2020/5

N2 - The dynamics of turbine blades with underplatform dampers (UPDs) is often experimentally explored by using small test rigs like two-blade models for cost and complexity reasons. In this paper, the dynamics of a large-scale academic turbine disk is measured on a special rotation test rig. Such measurements have rarely been published so far. The test rig supports speeds up to 3600 rpm and turbine disks up to a diameter of 1.2 m. The turbine disk is tested linearly as well as with asymmetric and cylindrical UPDs. The excitation forces and the excitation order are varied. The results prove the damper effectiveness by lowering resonance amplitudes. Additionally, the mistuning influence on the result depiction is discussed. The measurements are compared to simulations of the nonlinear frequency response functions (FRFs), showing good agreement.

AB - The dynamics of turbine blades with underplatform dampers (UPDs) is often experimentally explored by using small test rigs like two-blade models for cost and complexity reasons. In this paper, the dynamics of a large-scale academic turbine disk is measured on a special rotation test rig. Such measurements have rarely been published so far. The test rig supports speeds up to 3600 rpm and turbine disks up to a diameter of 1.2 m. The turbine disk is tested linearly as well as with asymmetric and cylindrical UPDs. The excitation forces and the excitation order are varied. The results prove the damper effectiveness by lowering resonance amplitudes. Additionally, the mistuning influence on the result depiction is discussed. The measurements are compared to simulations of the nonlinear frequency response functions (FRFs), showing good agreement.

UR - http://www.scopus.com/inward/record.url?scp=85091698108&partnerID=8YFLogxK

U2 - 10.1115/1.4045337

DO - 10.1115/1.4045337

M3 - Article

VL - 142

JO - Journal of Engineering for Gas Turbines and Power

JF - Journal of Engineering for Gas Turbines and Power

SN - 0742-4795

IS - 5

M1 - 051002-1

ER -