Effects of friction dampers on aerodynamically unstable rotor stagesAttention is given to the physical concepts and mathematical techniques useful in the analysis of the stabilizing effect of friction on aerodynamically unstable rotor stages. Results are presented for three-, four-, and five-bladed disks. In the present multidegree-of-freedom model of an aerodynamically unstable rotor stage, a harmonic steady state solution due to the friction dampers may be either a stability limit, a stable cycle limit, or neither. A criterion is established in the form of an energy function which determines whether the solution is a stability limit. In the event that the initial displacement and velocity exeed those associated with the steady state solution corresponding to a stability limit, the reponse becomes unbounded.
Document ID
19830051573
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Griffin, J. H. (Carnegie-Mellon University Pittsburgh, PA, United States)
Sinha, A. (Carnegie-Mellon Univ. Pittsburgh, PA, United States)