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Three-dimensional wind-resistant design method for power transmission tower

A design method and technology for transmission towers, applied in towers, computing, electrical digital data processing, etc., can solve the problems of super-long cross-arm inflow disturbance, sudden change in the windward area and mass of transmission towers, and significant cross-wind vibration effects of transmission towers. , to achieve the effect of ensuring safety and economy

Inactive Publication Date: 2012-07-25
STATE GRID CORP OF CHINA +2
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AI Technical Summary

Problems solved by technology

[0005] 1) The windward area and mass of the transmission tower have serious mutations, and there are no specifications for the shape coefficient and wind vibration coefficient of the tower body and cross-arm structure
[0006] 2) The ultra-long cross arm has a serious disturbance to the incoming flow, and the cross-wind vibration effect of the transmission tower is significant
[0009] Obviously, conventional design methods cannot be applied to the wind-resistant design of ultra-long cross-arm transmission towers

Method used

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  • Three-dimensional wind-resistant design method for power transmission tower
  • Three-dimensional wind-resistant design method for power transmission tower
  • Three-dimensional wind-resistant design method for power transmission tower

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Embodiment Construction

[0051] The present invention will be described in detail below in conjunction with accompanying drawing and embodiment: figure 1 , 2 As shown, the transmission tower mainly includes: conventional structural contents such as the tower body 1 and the cross arm 2; wherein figure 2 The β shown in is the wind direction angle, when β is equal to 0 degrees, it is along the line, and when β is equal to 90 degrees, it is the horizontal direction. combine figure 1 , 2 The four-circuit transmission tower on the same tower is shown, and the segmental estimation method of the node wind load cross spectrum is described in detail.

[0052] The three-dimensional wind-resistant design method of the transmission tower includes:

[0053] 1) Make a rigid scale model of the transmission tower, and conduct a wind tunnel test of the uniform flow field balance force measurement. The test wind direction angle is 0°~90°, and every 15° is a test condition; by adding or subtracting cross-arm compon...

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Abstract

A three-dimensional wind-resistant design method for a power transmission tower includes the steps: carrying out a rigid model balance force measurement wind tunnel test by means of increasing and decreasing components of cross arms, and measuring shape coefficients of a power transmission tower body with the overlong cross arms and all direction wind angles of the cross arms; and obtaining wind load cross-power spectrums, based on a base response force spectrum, of a downwind direction, an across-wind direction and a reversing direction of each node by means of a height sectioning estimation method of power transmission tower node wind load spectrums, and obtaining three-dimensional equivalent node wind load directly used for power transmission tower wind-resistant design by the aid of a load-response correlation method based on the node wind load cross-power spectrums. The three-dimensional wind-resistant design method for the power transmission tower takes the influence of different wind direction angles on the shape coefficients into consideration, truly measures shape coefficient values of the overlong cross arms serving as special components, breaks through normative limitations, and takes full account of characteristics of the power transmission tower with the overlong cross arms, wind induced response of the power transmission tower in the downwind direction is calculated, and simultaneously wind induced response of the power transmission tower in the across-wind direction and the reversing direction is calculated, so that safety, economy and reliability in design of the power transmission tower with the overlong cross arms are guaranteed.

Description

technical field [0001] The invention relates to a wind-resistant design method for towers of overhead transmission lines, more specifically, a three-dimensional wind-resistant design method for super-long cross-arm transmission towers. Background technique [0002] In order to solve the contradiction between the lack of available land and the large demand for power transmission capacity, ultra-high voltage multi-circuit transmission lines on the same tower have been widely used in recent years. The wind load is the main control load of the multi-circuit transmission tower on the same tower, so it is of great significance to reasonably determine the wind resistance design method to ensure the safety, economy and reliability of the transmission tower design. [0003] The "Technical Regulations on the Design of Tower Structures for Overhead Power Transmission Lines" (DL / T 5154 hereinafter referred to as "Technical Regulations") requires that when the total height of the tower e...

Claims

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Application Information

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IPC IPC(8): G06F17/50E04H12/10
Inventor 郭勇高志林沈国辉邢月龙沈建国应建国欧晓晖潘峰黄永林黄静文
Owner STATE GRID CORP OF CHINA
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