Stick-slip motion of turbine blade dampers

Turbine blade dampers are small elements of a parabolic configuration usually fabricated from sheet steel. They are positioned loosely between the roots of turbine blades improving the damping of blade vibrations by generating dry friction from the relative motion of blades and damper. This paper presents a theoretical approach to these stick-slip vibrations and compares theory with measurements. Additionally, some design aspects of such dampers are discussed by considering the damping behaviour in relation to important design parameters.

[1]  M. Hundal.  Response of a base excited system with Coulomb and viscous friction , 1979 .

[2]  F. Pfeiffer.  Mechanische Systeme mit unstetigen übergängen , 1984 .

[3]  P. Holmes,et al.  Nonlinear Oscillations, Dynamical Systems, and Bifurcations of Vector Fields , 1983, Applied Mathematical Sciences.

[4]  Friedrich Pfeiffer,et al.  Dynamical systems with time-varying or unsteady structure , 1991 .

[5]  J. H. Griffin,et al.  Friction damping of flutter in gas turbine engine airfoils , 1983 .

[6]  J. S. Rao.  Turbomachine Blade Vibration , 1991 .

[7]  Martin Otter,et al.  A very efficient algorithm for the simulation of robots and similar multibody systems without invers , 1986 .

[8]  V. Ramamurti,et al.  Analysis of turbomachine blades: a review , 1984 .

[9]  M. Lalanne,et al.  VIbration problems in jet engines , 1985 .

[10]  Theorie der Reibungsschwingungsdämpfer , 1938 .

[11]  G. Piero,et al.  Unilateral Problems in Structural Analysis , 1985 .

[12]  Per Lötstedt.  Mechanical Systems of Rigid Bodies Subject to Unilateral Constraints , 1982 .

[13]  S. Kato,et al.  Stick-Slip Motion of Machine Tool Slideway , 1974 .

[14]  P. Panagiotopoulos.  Inequality problems in mechanics and applications , 1985 .

[15]  Per Lötstedt.  Coulomb Friction in Two-Dimensional Rigid Body Systems , 1981 .

[16]  C. F. Beards,et al.  Damping in structural joints , 1979 .

[17]  W. Schichlen.  Reibungsbehaftete Bindungen in Mehrkörpersystemen , 1983 .

[18]  Steven W. Shaw,et al.  On the dynamic response of a system with dry friction , 1986 .