Analysis of dynamic characteristics of misaligned splines in aviation spline-rotor system

ObjectiveSplines are important connectors in aviation power transmission systems, and are affected by manufacturing errors, assembly errors or working loads, and often occur in parallel misalignment, angular misalignment and comprehensive misalignment, which affects the meshing length and bearing capacity of each tooth of the spline. In order to improve the stability of the transmission system and reduce the failure rate of aviation splines, it is necessary to analyze the dynamic meshing stiffness characteristics of misaligned splines.MethodThe dynamic model of the aviation spline-rotor system was established, the time-varying meshing length of the spline was solved, and the slicing method and the Ishikawa method were combined to obtain the stiffness of the spline single tooth meshing under different dislocation conditions and the dynamic response of the system was solved.ResultThe results show that the change amplitude of spline single-tooth meshing stiffness and the dynamic response of the rotor system increase when the static parallel dislocation and static angular dislocation amount are increased. The static parallel dislocation amount remains unchanged, and the static angular dislocation amount changes, and the change of spline meshing stiffness and the dynamic response of the rotor system is not obvious. The static angular dislocation amount remains unchanged, and the static parallel dislocation amount increases, and the spline meshing stiffness and the dynamic response of the rotor system change significantly.