Abstract: The components of rotors with curvic couplings are simplified and classified into 4 types of structures, the engineering expressions to calculate the axial compliances of the structures are derived by means of elasticity, shell theory, finite element method, multivariable interpolation technique,etc., and the formulae are given out to calculate the relaxed or pressed forces on the contact surfaces of the curvic couplings caused by the centrifugal load, aerodynamic load, thermal load and maneuver load. A computer program developed according to the method and formulae of this paper is also introduced, and an application example is given.

Key words: rotor swith curvic couplings, axial relaxed forces, axial pressed forces, axial preloads