The flexspline

as a critical component of harmonic drive

of which the fatigue strength directly affects the bearing capacity and service life of harmonic drive.Establishes the parameterized model of flexspline contact analysis based on the APDL is established.Considering the gap of bearing and the assembly clearance of the flexspline and wave generator

the stress field of the flexspline is obtained using finite element method.On this basis

orthogonal test is applied to study the impact of the structural parameters on the maximum stress of flexspline cup.Further

an optimization model is built to minimize the maximal stress.Finally

the optimal parameters of flexspline cup are obtained using zero-order method.