System and simulation method for transmission tower structure static mechanic analysis

A transmission tower and analysis system technology, applied in the field of electric power industry, can solve the problems of complex modeling and analysis process of tower structure, long cost cycle, high cost, etc., achieve standard tower modeling process and performance evaluation process, improve efficiency and quality , the effect of lowering the threshold of use

Active Publication Date: 2015-04-08
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the study of the structural strength of towers, there is a relatively complete theoretical basis and corresponding design specifications. With the development of electronic computers, tower analysis software has gradually appeared, such as the self-supporting tower internal force analysis software written by the Northeast Electric Power Design Institute using Fortran77 , but its strict data preparation and input requirements and cumbersome operation process make its application not universal and universal; many design units carry out mechanical analysis of towers based on commercial finite element software, such as Southwest Electric Power Design Institute and Chongqing University based on ABAQUS conducts finite element simulation research on wind deflection of 220kV high-voltage transmission lines; Hunan Electric Power Test Research Institute uses ANSYS software to analyze the tower line system structure, analyze its stress and displacement deformation under ice load, and calculate the ultimate ice load and tower collapse type of damage
This kind of mechanical analysis method based on commercial software, because the modeling and analysis process of the tower structure is quite cumbersome, it takes a long time and the cost is high

Method used

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  • System and simulation method for transmission tower structure static mechanic analysis
  • System and simulation method for transmission tower structure static mechanic analysis
  • System and simulation method for transmission tower structure static mechanic analysis

Examples

Experimental program
Comparison scheme
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Embodiment approach

[0044] In this case, a three-tower and four-line model including a load-bearing tower and tension towers at both ends is selected for static analysis. The specific steps are as follows:

[0045] (1) Build the tower body model

[0046] First, build the body model of the middle tower. Using the interface developed by the system, input the node numbers and node coordinates in sequence (1, -2.2, 2.2, 26.9; 2, -2.59, 2.59, 31.4; 3, -2.83, 2.83, 34.2; 4, -3.07, 3.07, 37.0 ;...), using Ans y s software function to generate Ke y Point, by connecting Key Point forms the rod Line, and finally generates the middle tower body model.

[0047] Secondly, establish the tower body model at both ends. Use the tower body modeling interface at both ends of the system to input the node number and node coordinates (66, -1.7, -41.7, 28.0; 67, -1.9, -41.9, 31.0; 71, -2.2, -42.2, 33.9; ...) connect to generate members. The tower body models at both ends are generated by the position of the tower...

example 1

[0054] Example 1: For model D91420, the last two digits represent the thickness of the steel pipe; the first two / three digits represent the outer diameter of the steel pipe. D—seamless steel pipe; 914—outer diameter of steel pipe, 914mm; 20—thickness of steel pipe, 20mm.

example 2

[0055] Example 2: For model L5004, the last two digits represent the thickness of the angle steel; the first two / three digits represent the length of the angle steel. L—equal side angle steel; 50—angle steel length, 50mm; 04—angle steel thickness, 4mm.

[0056] First define the material of the tower body, and select Q345 steel for the tower body; secondly, define the cross-sectional shape of the tower body, use equilateral angle steel L20024 for the stressed parts, and use equilateral angle steel L8010 for auxiliary parts.

[0057] (4) Establish wire model

[0058] The insulators and other components are ignored in the modeling of this model, and the wires are directly connected to the cross-arm of the tower. Four conductors are connected to each tower head.

[0059] (5) Define wire properties Consider the twisting deformation of the wire, use ansysBeam189 beam element. The section is defined as a solid circular section with a diameter d=32.76mm and a cross-sectional area A...

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Abstract

The invention relates to a system and a simulation method for transmission tower structure static mechanic analysis. Modeling of a transmission tower is carried out by utilizing a development function of software of finite element analysis, a transmission pole section bar and a rod piece material are integrated, the dead load or the icing load of a transmission pole and a lead as well as the wind load of a tower body and the lead are computed through directly inputting the actual work condition data of the transmission tower, and comprehensive analysis processing is carried out on the loads to generate an analysis report, a stress nephogram and an aberration nephogram, so that a complicated computational process and a complicated operation process are reduced, and thus the design of the transmission tower becomes fast and effective.

Description

technical field [0001] The invention relates to a static mechanical analysis system of a transmission tower structure and a simulation method thereof, in particular to a static analysis method for analyzing a transmission tower structure under wind load and ice load conditions, and belongs to the technical field of electric power industry. Background technique [0002] Transmission towers are pole-shaped and tower-shaped structures that support the conductors and ground wires of overhead transmission lines and keep a certain distance between them and the ground. Their safety and reliability are directly related to the safe operation of the entire transmission line. In the overhead transmission line project, the cost of tower construction accounts for about 30% or more of the main body investment, which directly determines the economy of the line. [0003] The traditional tower design method is manual calculation, and structural mechanics and finite element methods are used t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F9/455G06Q50/06
Inventor 彭家宁边美华卢展强张兴森梁世容施锦奎刘志伟王昱皓李铭
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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