Method for evaluating ice resistance of tower-wire coupled system of overhead transmission line

The invention relates to a method for evaluating ice resistance of a tower-wire coupled system of an overhead transmission line, which belongs to the technical field of natural disaster prevention of the overhead transmission line. The method comprises the steps of selecting a micro terrain section which is easy to have ice coating in the overhead circuit by utilizing a computer through a program, establishing a finite element model of the tower-wire coupled system, calculating a weak link and the ice resistance of the tower-wire coupled system under the effect of uniform ice coating and wind load, carrying out non-uniform ice coating load correction for the micro terrain section where the ice coating is easy to occur, and determining the weak link and the ice resistance of the tower-wire coupled system. The method has characteristics that the workload is small, the authenticity is high, the precision is high, reliable evidence can be provided for the ice coating disaster early-warning grade and the early-warning threshold value of the overhead transmission line so as to take de-icing measures in time, the ice coating disaster can be effectively prevented, and the safe and reliable running of the overhead transmission line can be ensured. The method can be widely applied to the evaluation of the ice resistance of the tower-wire coupled system of the overhead transmission line.