Power transmission tower remaining life evaluation method based on corrosion model
A technology for transmission tower and life evaluation, which is applied in the field of electric power engineering, can solve problems such as remaining life evaluation of transmission towers that cannot be used, and achieves the effect of less parameters involved, strong practicability, and reduced research workload.
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[0103] A method for evaluating the remaining life of a transmission tower based on a corrosion model, taking a spanning transmission tower that has been used for 29 years in central China as the research object, the evaluation method includes the following steps:
[0104] a. Through the modeling analysis of the finite element model, determine the failure corrosion thickness δ of the transmission tower lim ;
[0105] First, if figure 1 , figure 2 As shown, the transmission tower models with different geometric slenderness ratios λ (20-250, interval 5) are established. In the model, the weakened thickness range δ of the gusset plate is considered to be increased from 0.1mm to 1.0mm. A set of models is calculated every 0.1mm, and Compare the mechanical properties of the weakened nodes with the intact nodes, study the changes in the mechanical properties of the transmission tower due to corrosion, apply constraints and loads, and use the nonlinear solution method to obtain the ...
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