Spline coupling in the rotor dynamics problems of a gas turbine engine
Authors: Nikolaev I.V., Leontiev M.K., Popov V.V.
Published in issue: #9(141)/2023
DOI: 10.18698/2308-6033-2023-9-2306
Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts
Involute spline couplings are widely used in the aircraft gas turbine engine rotors. In the rotor dynamics problems, they are usually simulated by a link connecting the shafts. Rigidity characteristics of such a connection depend on a set of factors: forces acting from the connected shafts section leading to the shafts distortion in the spline coupling; torque transmitted by the splines; gaps between the splines; friction forces in the contact pairs. Taking into account all these factors is quite labor-intensive even in the finite element formulation. In addition, spline coupling is a nonlinear element, which characteristics depend on the engine operating mode. The paper presents an analytical model making it possible to account for all operating factors of a spline coupling. The model was verified using the finite element calculations.
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