Abstract: On the basis of FMD (Flexible multi-body dynamics) theory, more accurate dynamic model for linkage mechanism with clearance connections is established, considers the strong couple between rigid movement with clearances and elastic linkages deformation. By combining numerical integral method solving stiff equation with mode analysis method solving elastic deformation responses, the dynamic response of linkage mechanism with clearance connections is achieved. The example indicates that the modeling and solving method is accurate and more general for mechanical optimal design.

Key words: Clearance, Elastic, FMD theory, Solving, Strong couple