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Method and system for evaluating safety of power transmission tower under downburst and storage medium

A power transmission tower and safety technology, applied in the field of power transmission, can solve the problems such as the method for determining the structure of the downburst wind field is not specific enough, and the safety assessment method for the tower against downburst is lacking.

Active Publication Date: 2021-03-16
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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  • Claims
  • Application Information

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Problems solved by technology

However, the method for determining the structure of the downburst wind field in the project is not specific enough, and there is a lack of a relatively simple and rapid safety assessment method for the design of the tower against the downburst

Method used

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  • Method and system for evaluating safety of power transmission tower under downburst and storage medium
  • Method and system for evaluating safety of power transmission tower under downburst and storage medium
  • Method and system for evaluating safety of power transmission tower under downburst and storage medium

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Embodiment 1

[0075] Below in conjunction with a typical transmission iron tower in a certain transmission line, the scheme of the present invention is further described, the combined transmission iron tower (see figure 1 ) The type of tower is a straight tower with a height of 57 meters and a height of 40 meters. Evaluate the safety status of the transmission tower under the downburst, including the following steps 1)-step 5):

[0076] 1) According to the design information of the transmission tower, set the wind load simulation points, and establish the three-dimensional finite element numerical model of the transmission tower.

[0077] The power transmission tower design information includes, but is not limited to, a material summary diagram of the power transmission tower. The material summary diagram of the transmission tower includes the structural dimensions of the components and the content of the material grade. According to this content, the transmission tower can be divided into ...

Embodiment 2

[0133] Analyze a typical transmission tower in another transmission line, the combined transmission tower (see Figure 11 ) The type of pole tower is a straight line tower with a height of 38.7 meters and a height of 28 meters. According to the quasi-static analysis results of the transmission tower structure by finite element software, the comparison of the most unfavorable main material stress and tower top displacement time history diagram under the action of downburst and equivalent static wind load (see Figure 12 and Figure 13 ), which also verified the accuracy of the method.

[0134] Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take th...

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Abstract

The invention discloses a method and system for evaluating the safety of a power transmission tower under downburst and a storage medium. The method comprises the following steps: according to designinformation of the power transmission tower, dividing tower sections of the power transmission tower, setting wind load simulation points, establishing a three-dimensional finite element numerical model of the power transmission tower, and presetting a load information file interface in a model file; determining a downburst wind field structure, completing the simulation of each component of the wind field structure, traversing the wind load simulation points, and generating the wind speed and the wind load at each wind load simulation point; importing the load into a three-dimensional numerical model of the power transmission tower, performing transient dynamic analysis on the tower, and calculating an overall wind vibration coefficient of the power transmission tower structure accordingto an analysis result; according to the weather forecast data, generating downburst parameters, calculating time-varying average wind of each point, amplifying the average wind by using the overall wind vibration coefficient of the structure to obtain an equivalent static wind load, performing quasi-static analysis on the tower, and evaluating the structural safety of the power transmission towerby using an analysis result.

Description

technical field [0001] The invention belongs to the technical field of power transmission, and in particular relates to a method for evaluating the safety of a power transmission tower structure. Specifically, it is a method, system and storage medium for mechanical response analysis of transmission towers under downburst weather and rapid assessment of safety status. Background technique [0002] In recent years, my country's science and technology and national economy have developed rapidly, and the country has invested a lot of manpower and material resources in industrial construction, and the electric power industry is an important part of it, which has attracted much attention from the country. The structure of the transmission tower is a spatial system formed by connecting angle steels of different specifications, and the heights of different transmission towers are also different, ranging from tens of meters to hundreds of meters. The structure of the transmission t...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/23G06F30/28G06Q10/06G06Q50/06
CPCG06F30/13G06F30/23G06F30/28G06Q10/0639G06Q50/06Y02P90/82
Inventor 刘建军李鸿泽储昭杰王永强刘洋杨立恒袁光宇高超柏仓黄日星吴佰建郭小明
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST
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