“…For example, joints C, D and E that are basically revolute designs can roll with or without slip and at the same time vibrate transversely as shown in Figures 1(b) and 1(c), while the A and B ones that are of the cylindrical kind can actually slide and simultaneously translate and rotate dynamically normal to the bore axis as depicted in Figures 1(d)}1(f). In the classical rolling motion case, even though the damping e!ects of pure rolling and pure slipping are di$cult to separate out individually, its net vibratory energy dissipation due to simple shear resistance in the oil "lm can be obtained by performing a perturbation analysis about the mean geometry at a speci"c crank angle position [1,2]. Similarly, the e!ect of sliding perturbation on damping in the lubricated piston and cross-head due to viscous friction was also formulated earlier [1,2].…”