Walton, James F., Ku, C-P.R. and Lund, J.W., “An Experimental Investigation of the Dynamic Characteristics of an Axial Spline Coupling in High-Speed Rotating Machinery,” Presented at 14th Biennial Conference on Mechanical Vibration and Noise, September 19-22, 1993, Albuquerque, New Mexico, DE-Vol. 60 Vibrations of Rotating Systems, pp 265-270.
This paper presents the results of the second part of an investigation of the dynamic characteristics of an axial spline coupling in high-speed rotating machinery. In the experimental method, the bending moments and angular deflections transmitted across the axial spline coupling were measured while the nonrotating shaft was excited by an external shaker. The effects of external force and frequency on the angular stiffness and damping coefficients were investigated. The angular stiffness and damping coefficients were used to perform a linear steady-state rotordynamics stability analysis, and the unstable natural frequency was calculated and compared to experimental measurements. In addition, the mechanism and source of internal rotor friction instability caused by the axial spline couplings were studied.