Experimental method for equivalent wind load on cement poles

Abstract

The invention relates to a cement electric pole equivalent wind load loading device and an experiment method. The experiment method comprises steps of calculating the cement electric pole wind load, wherein the cement electric pole wind load includes a cement rod top lead wind load, an accessory wind load like the cross arm on the top of a cement rod , and a cement rod body wind load, and the wind load of each part is obtained through considering the wind-facing area, the wind pressure value, the shape coefficient, etc, obtaining an equivalent loading force amplitude on the basis of the fact that the bending moment on the cement electric pole by the loading force is equivalent to the bending moment on the cement electric pole by the wind load, taking the frequency point corresponding to the maximum amplitude value in the practical dynamic wind load frequency spectrum curve as the frequency of the equivalent loading force so as to determine the amplitude value and the frequency, and determining the time domain changing function of the equivalent loading force. The invention can provide a loading experiment method for generating a dynamic force equivalent with a certain typhoon level, which can realize the detection and estimation on the wind resistance of the cement electric pole and can further extract and improve the basic construction rule.

Description

technical field [0001] The invention relates to a cement pole equivalent wind load loading device and an experimental method. Background technique [0002] In the power system, cement poles are an important infrastructure for power transmission and distribution. They have a very wide range of applications, and the number of cement poles in stock is huge. Affected by typhoons, the cement poles and their hanging wires tend to shake considerably, resulting in loose foundations. What's more, the cement poles will break or the cement poles will rise from the foundation. Once a cement pole breaks or falls, the adjacent cement poles will be broken due to the force balance, and the possibility of falling or breaking will occur. Therefore, in the coastal areas, batches of rods tend to be reversed, which brings great hidden dangers to local production and life, and even the safety of life and property. Although national standards such as GB396-1994 have clear regulations on the cons...

AI Technical Summary

Problems solved by technology

The typhoon is short-lived, and wind tunnel experiments cost a lot of money. It is difficult for ordinary wind tunnel laboratories to meet such complex and diverse experimental needs. The loading device, through which the cement poles under various working conditions can be artificially loaded, and the relevant data of the loading load and the change of the cement pole foundation can be obtained

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