Power transmission line wind-induced response finite element analysis method coupled with local wind field

Abstract

The invention discloses a power transmission line wind-induced response finite element analysis method coupled with a local wind field. The method mainly comprises two parts of finite element analysisand wind field simulation. The method comprises: firstly, obtaining peripheral elevation data of a power transmission line, establishing a calculation domain, performing grid division, and then calculating wind field values; then establishing a geometric model and a finite element model of the power transmission line, and performing initial shape finding calculation; and finally, dividing the power transmission tower into a plurality of tower sections, calculating a wind load according to the wind field value of each tower section in combination with the windward side projection area of the power transmission tower line and a wind load model, and carrying out finite element analysis after the power transmission tower line is loaded to obtain a wind-induced response result. According to the method, the finite element model of the power transmission line and the wind-induced response result under different wind field conditions are obtained, and the terrain model and the wind field value around the power transmission line are obtained. The method is suitable for analyzing the wind-induced response of the power transmission line under various topographic conditions, and fully reflects the influence of the local wind field characteristic condition on the power transmission line.

Description

technical field [0001] The invention relates to a wind-induced response analysis method of a transmission tower, in particular to a method for analyzing the wind-induced response of a transmission line by applying wind field simulation coupling finite element analysis. Background technique [0002] Transmission line is the lifeline project related to national economy and people's livelihood. As the supporting structure of transmission line, the safety and reliability of transmission tower directly determines the normal operation of the entire transmission line and power grid. With the increasing scale of transmission lines, the collapse accidents of transmission towers are gradually increasing, especially in the case of strong winds, transmission towers are more vulnerable to damage. At the same time, in recent years, the voltage level of transmission electricity in my country has been continuously improved, and the use of transmission towers with a voltage level of 500kV an...

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Problems solved by technology

[0004] At present, a large number of wind-induced response studies of transmission lines have applied the finite element analysis method, but only using the finite element method to analyze the wind-induced response has made a lot of simplifications to the actual wind load of the transmission line, and the analysis results are not comprehensive and accurate enough.

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