Abstract: In order to study the seismic performance of 550 kV epoxy resin impregnated paper multioutlet bushing, the finite element analysis on the bushing were carried out in this paper. Draw a three-dimensional solid model based on the product design, calculate the natural frequency of this bushing through modal analysis, apply static terminal tension, self gravity, and equivalent wind load to the casing, calculate the maximum displacement of the casing under static load and response spectrum conditions. Finally, the working conditions of static load and seismic load are combined to analyze the displacement and stress of the main components of the bushing. The analysis data shows that the calculated safety factor of the bushing fully meets the AG5 seismic level requirements, the maximum stress position is the rolled tube,located at the upper part of the core body. During the later design, full consideration should be given to increasing the wall thickness and stiffness of the rolled pipe, in order to improve the safety factor.

    Key words: multioutlet bushing; epoxy resin impregnated paper; response spectrum; working condition combination; seismic performance