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Method and device for calculating internal force of extra-high voltage steel tube tower

A calculation method, the technology of UHV steel, applied in the direction of measuring device, measuring force, strength characteristics, etc., can solve the problems of inaccurate calculation, inconsistent actual internal force of steel pipe tower, etc.

Inactive Publication Date: 2010-01-27
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, at present, the internal force of the steel pipe tower calculated by the overall space truss method is inconsistent with the actual internal force, and the calculation is inaccurate

Method used

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  • Method and device for calculating internal force of extra-high voltage steel tube tower
  • Method and device for calculating internal force of extra-high voltage steel tube tower
  • Method and device for calculating internal force of extra-high voltage steel tube tower

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Experimental program
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Effect test

Embodiment 1

[0075] see figure 1 , which is a flow chart of the first embodiment of the method for calculating the internal force of the ultra-high pressure steel pipe tower of the present invention.

[0076] S101: The main material of the steel pipe tower is calculated using the beam element model to calculate the internal force.

[0077] see figure 2 , which is a schematic diagram of the UHV steel pipe tower of the present invention.

[0078] The main material of the steel pipe tower includes:

[0079] The upper plane main material 201 of the upper conductor cross arm, the lower plane main material 202 of the upper conductor cross arm, the upper plane main material 203 of the middle conductor cross arm, the lower plane main material 204 of the middle conductor cross arm, the upper plane main material 205 of the lower conductor cross arm, The lower plane main material 206 of the cross arm of the lower conductor, the upper plane main material 207 of the ground wire support, the lower p...

Embodiment 2

[0087] The calculation method of beam element and rod element force is introduced in detail below.

[0088] Whether it is a beam unit or a bar unit, the stress situation is calculated from two aspects of strength and stability, and the larger value is taken as the stress standard.

[0089] see image 3 , which is a flow chart of the second embodiment of the method for calculating the internal force of the ultra-high pressure steel pipe tower of the present invention.

[0090] The main material of the steel pipe tower is calculated using the beam element model to calculate the internal force, specifically:

[0091] S301: Calculating the strength stress and stability stress of the beam element respectively.

[0092] The calculation of the strength stress of the beam element is as follows:

[0093] σ 1 = N A n ± M y ...

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Abstract

The invention provides a method and a device for calculating the internal force of an extra-high voltage steel tube tower. The method comprises the following steps: the internal force of a main material of the steel tube tower is calculated by a beam element model; and the internal force of the part except the main material of the steel tube tower is calculated by a lever unit module. As a lever unit belongs to a unit type that two ends of the lever are hinged, two unit lever end nodes both can generate linear displacement in three directions only and only can bear axial force but not bending moment; the beam element belongs to a unit type that two ends of the lever are rigidly connected, and two unit lever end nodes both can generate linear displacement in three directions and rotational displacement in three directions, and can bear axial force and bending moment. The calculated stress of the steel tube tower is more close to the stress condition of a real steel tube tower and is more accurate than the stress of the steel tube tower calculated completely by the lever unit in the prior art.

Description

technical field [0001] The invention relates to the technical field of UHV power transmission equipment, in particular to a method and device for calculating the internal force of a UHV steel pipe tower. Background technique [0002] In order to reduce transmission loss and improve transmission quality, my country has built the first UHV transmission line. [0003] UHV AC transmission refers to AC transmission projects and related technologies with a voltage level of 1000kV and above. UHV transmission technology has the characteristics of long distance, large capacity, low loss and economy. Although UHV transmission technology has the above advantages, due to the high voltage level of UHV, there are high requirements for transmission line towers. [0004] Steel pipe towers are widely used in the construction of UHV transmission lines in my country due to the excellent cross-sectional properties of steel pipes, small component shape coefficients, and beautiful appearance, a...

Claims

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Application Information

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IPC IPC(8): G01N3/00G01L1/00
Inventor 刘振亚孙昕杨靖波韩军科李茂华李峰杨风利
Owner CHINA ELECTRIC POWER RES INST
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