The coupled bending torsional dynamic behavior in the rotating machinery: modeling, simulation and experiment validation ScienceDirect Engineering at Alberta Courses Coupling of Equations of Motion Two degrees of freedom linear system response of structures Dynamic modeling and nonlinear analysis for lateraltorsional coupling vibration in an unbalanced rotor system ScienceDirect Vibrational energy transfer in coupled mechanical systems with nonlinear joints ScienceDirect Coordinate coupling, generalized coordinates, and Principal coordinates Part 1