The lifting and stepping frame of a furnace at Xiangtan high-speed wire plant

because of its weight and multiple loads

has complex boundary conditions. In the first step

the loads of the furnace’s lifting and stepping frame are simplified

and theoretical analysis and calculation with finite element method are carried out. And then the stress data of the frame are got by stress-strain testing technology

which are compared with the calculation results. Analysis of the fatigue life of the frame is taken by the tested data at last. The analysis shows that the fatigue life of the lifting and stepping frame of the furnace is sufficient

if the existing load conditions can be ensure in the same situation

the furnace could continue to use.