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Method for determining fluctuation wind induced vibration load of power transmission tower

A transmission tower, pulsating wind technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as wind vibration time history generation

Inactive Publication Date: 2016-02-24
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining the fluctuating wind-induced load of transmission towers, and to solve the generation problem of wind-induced time-history when the transmission tower is subjected to wind-induced time-history response analysis

Method used

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  • Method for determining fluctuation wind induced vibration load of power transmission tower
  • Method for determining fluctuation wind induced vibration load of power transmission tower
  • Method for determining fluctuation wind induced vibration load of power transmission tower

Examples

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Embodiment 1

[0056] The invention of this example provides a method for determining the fluctuating wind-induced load of transmission towers, including: figure 2 and 3 Shown:

[0057] Step 1) Set transmission tower parameters:

[0058] Set the section parameters of the transmission tower structure, including the height of each section, the number of nodes on each section, the number of nodes, and the area of ​​the windward side of the section. These parameters are set to convert the time-history data of wind speed into time-history data of wind pressure.

[0059] Step 2) Set wind load calculation parameters:

[0060] The wind load calculation parameters that need to be set in the present invention include surface roughness index, reference wind speed height, wind speed at the reference height, cut-off frequency, frequency interval, and wind speed time course length.

[0061] Step 3) generate fluctuating wind speed power spectral density function:

[0062] Davenport has measured more ...

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Abstract

The present invention relates to a method for determining a fluctuation wind induced vibration load of a power transmission tower. The method comprises: determining a fluctuating wind velocity power spectrum density function; generating a random fluctuating wind velocity sample by decomposing a matrix of the fluctuating wind velocity power spectrum density function; and according to the fluctuating wind velocity sample, determining the fluctuation wind induced vibration load. The technical scheme of the present invention is applicable to general power transmission towers and the generated wind induced vibration load data can be directly used for performing finite element analysis, so that finite element calculation research in wind induced vibration time history analysis of the power transmission towers is greatly facilitated.

Description

Technical field: [0001] The invention relates to the field of transmission line poles and towers, and more particularly relates to a method for determining the fluctuating wind vibration load of transmission lines and towers. Background technique: [0002] Wind load is one of the important dynamic loads acting on the structure, especially for towering structures such as transmission towers, the effect of wind load must be considered in the design. An effective method for calculating the dynamic wind vibration of transmission towers is the MonteCarlo method, which generates a series of time-history samples according to certain established statistical parameters, and performs linear or nonlinear structural analysis on each sample function. The statistical analysis of the time-history response of the unit under the sample function calculates whether the structure is safe. The wind speed at a specific point of the structure is generally considered to be a stable random process, ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 王飞苏志钢李清华韩军科王旭明刘亚多汪长智胡晓光朱彬荣曹晔晖杨风利张宏杰邢海军
Owner CHINA ELECTRIC POWER RES INST
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