In recent years

frequent ice disasters have brought serious impacts to the social economy and people's life. Especially in the field of electric power

the impact of ice-accreting disasters on transmission lines is very significant. Analyzing the dynamic impact of ice-accreting on transmission lines has an important theoretical and applied values for guiding the design

operation and maintenance of transmission lines in ice-prone areas

and for improving the ice-resistance and disaster mitigation capability of transmission lines. The current research on ice-shedding jumps focuses on the impact of Ice-shedding jumps on conductors

and there is insufficient research on the comprehensive impact of the tower-line system. We established a finite element model of tower-line system

calculated the dynamic impact of tower-line system under simultaneous ice-shedding

one end ice-shedding

central ice-shedding and two ends ice-shedding

and analyzed the conductor ice-jumping height

tension

imbalance tension

insulator deflection

and tower pole member axial force. The results show that

under the simultaneous ice-shedding mode

the conductor displacement

tension and unbalance tension amplitude are large

the insulator vibrates violently

the tower part of the rod stress is large

and the axial force of the main material occurs in the process of tension-pressure-tension to change the direction repeatedly. Under the other three modes

the conductor ice jump height

tension and unbalance tension amplitude

the insulator's offset amplitude are small

the attenuation speed is fast

the tower member stress is obviously reduced

the main material axial force of tower leg does not occur in the direction of the change of direction phenomenon. From the response of each position

two ends ice-shedding is the most appropriate way to ice-shedding.