Analysis of Contact Problem of Drum Gear Coupling Chang Jiane; Lu Hong(Lect.,Institute of Mechanical & Electric Engineering,WUT,Wuhan 430070,China.) Through the analysis of contact problem of drum gear coupling. the paper establishes a numerical model of the coupling,calculates the contact-stress and deformation of the coupling with B. E. M. of tains a significative result. drum gear coupling, contact, BEM