Power transmission tower pole stress calculation method based on finite element analysis

A technology of transmission tower and calculation method, which is applied in the field of safety evaluation of transmission line operation status, and can solve problems such as inaccuracy

Active Publication Date: 2015-01-14
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
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Problems solved by technology

The results given by this analysis method cannot provide accurate stress data for safety assessment
From the perspective of mechanical analysis, it is not accurate

Method used

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  • Power transmission tower pole stress calculation method based on finite element analysis
  • Power transmission tower pole stress calculation method based on finite element analysis
  • Power transmission tower pole stress calculation method based on finite element analysis

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Embodiment Construction

[0032] A finite element analysis-based stress calculation method for transmission tower members can be summarized into four stages: pre-processing, finite element mechanical analysis, working condition load processing and post-processing. The pre-processing includes establishing the finite element mechanical model of the iron tower structure and discretizing the overall structure; the finite element mechanical analysis is to analyze the finite element mechanical model of the iron tower structure, combining the spatial angle relationship between the members in the iron tower structure and The connection relationship is superimposed to generate the overall stiffness matrix; the load processing of the working condition is to equivalently displace the uniform load and non-node load on the tower to the nodes to form a node load array; the post-processing is to use the node displacement array as the unknown quantity, and the overall Stiffness matrix and load array form a matrix equat...

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Abstract

The invention discloses a power transmission tower pole stress calculation method based on finite element analysis. The power transmission tower pole stress calculation method comprises the following steps: establishing a finite element mechanical model of a tower structure by utilizing a finite element method, and carrying out discretization of an integral structure according to the composition of the tower structure; generating an element rigidity matrix for each element, and overlapping the element rigidity matrixes to generate an integral rigidity matrix in combination with a space angle relationship and a connection relationship among various poles in the tower structure; then, generating a load array according to a load borne by the tower, and constituting a matrix equation by a node displacement array as an unknown quantity, the integral rigidity matrix and the load array; finally, acquiring a node strain by solving the matrix equation, and finally acquiring the stress of each pole in the tower structure. According to the power transmission tower pole stress calculation method, the power transmission tower pole stress is accurately solved directly by a mathematical method, and a scientific basis is provided for safety evaluation of the tower structure.

Description

technical field [0001] The invention relates to a method for analyzing the structural mechanics of a power transmission iron tower and accurately calculating the stress of each member, which belongs to the field of safety evaluation of the running state of a power transmission line. Background technique [0002] The production and transmission of electric energy is the lifeblood of the country's economic and social development, and the transmission line is the "lifeline" related to the national economy and people's livelihood. As an important lifeline project, transmission lines provide a strong guarantee for the efficient supply and rational distribution of electric energy. The sustainable and healthy development of the economy and society has put forward higher requirements for the safety and reliability of transmission line operation. However, due to my country's vast territory, long transmission line paths, high towers, a large number of crossing deep mountains and rive...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/23G06F2111/04G06F2111/10G06F2119/06
Inventor 徐剑峰郭成功葛乐朱张蓓朱富云龚灯才朱卫吴晓楠蒋徐勇尹海海
Owner STATE GRID CORP OF CHINA
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