Molding surface design and finite element analysis of nshape membranous  discs structure on diaphragmcoupling
LI Bo, LU Bo, LIU Cuiping

(College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: Aiming at the problems of surface design of diaphragm coupling and its stress distribution under different types of loads, finite element analysis technique was applied to the design of diaphragm coupling, the n shape double membrane disc structure was investigated. The surface was designed according to equal strength approximation theory, two simplified finite element model of axial symmetry and cyclic symmetry was built for stress analysis of diaphragm coupling. Based on given boundary conditions and initial conditions, the axial stiffness characteristic and its stress under different conditions were established. The different influence of torque, centrifugal force and misalignment load were calculated. The experimental results show that on the occasion of large torque, high speed, small axial deflection and small angle deflection, the hyperbolic design of n shape double membrane disc structure is an ideal way.

Key words: diaphragm coupling; two membranous disc structure; ANSYS finite element; stress analysis