Harmonic Forced Vibration of Two Rotating Blades with Friction Damping

This paper focuses on the modelling of harmonic vibration of two rotating blades affected by friction in contact of a rigid body placed in between the blade shroud. Harmonic blade excitation uniformly distributed in blade nodes in circumferential and axial direction is supposed. Flexible blades are discretized by FEM using 1D Rayleigh beam elements. The nonlinear friction forces in contact surfaces between the blade shroud and the friction element are taken into account using the harmonic balance method. Orbits of central contact points and dissipation energy are investigated in dependence on the excitation frequency. Dissipation energy amount in contact surfaces is confronted with blade tips vibration.

[1]  Walter Sextro,et al.  Dynamical Contact Problems with Friction , 2002 .

[2]  Tomas Misek,et al.  Prediction of High Cycle Fatigue Life of Steam Turbine Blading Based on Unsteady CFD and FEM Forced Response Calculation , 2007 .

[3]  Ning An,et al.  A microslip friction model with normal load variation induced by normal motion , 2007 .

[4]  M. Allara,et al.  A model for the characterization of friction contacts in turbine blades , 2009 .

[5]  Alok Sinha,et al.  Statistics of Responses of a Mistuned and Frictionally Damped Bladed Disk Assembly Subjected to White Noise and Narrow Band Excitations , 2000 .

[6]  Lars Panning,et al.  Experimental analysis of shrouded blades with friction contact , 2006 .

[7]  Alok Sinha,et al.  Statistics of Response of a Mistuned Bladed Disk Assembly Subjected to White Noise and Narrow Band Excitation , 1998 .

[8]  Marc Berthillier,et al.  Dynamic Study of a Structure with Flexion-Torsion Coupling in the Presence of Dry Friction , 1999 .

[9]  G. Csaba,et al.  Forced Response Analysis in Time and Frequency Domains of a Tuned Bladed Disk with Friction Dampers , 1998 .

[10]  Stefano Zucca,et al.  Underplatform dampers for turbine blades: The effect of damper static balance on the blade dynamics , 2009 .

[11]  Stefano Zucca,et al.  Analytical formulation of the Jacobian matrix for non-linear calculation of the forced response of turbine blade assemblies with wedge friction dampers , 2006 .

[12]  Eugene I. Rivin,et al.  Stiffness and Damping in Mechanical Design , 1999 .

[13]  V. V. Matveev,et al.  On the Problem of Improvement of the Damping Ability of Rotor Blades of Contemporary Gas-Turbine Engines , 2003 .

[14]  H. Nevzat Özgüven,et al.  Nonlinear vibration analysis of bladed disks with dry friction dampers , 2006 .