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Thin-wall centrifugal concrete steel tube tower stress and finite element analysis method

A technology of concrete steel pipes and analysis methods, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as cumbersome steps, inaccurate calculations, and slow convergence speed

Pending Publication Date: 2020-08-18
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing transmission tower structure optimization analysis and design methods still have the following two defects: the existing transmission tower structure analysis and design method has a slow convergence speed and inaccurate calculation for the optimal design results of transmission towers under multiple working conditions and multiple loads; Some structural analysis and design methods of transmission towers have cumbersome steps. For transmission towers with relatively fixed tower types, such as steel pipe towers, there is a lack of analysis and design methods that are simple to operate, simple in method, and can meet the actual requirements of the project to a certain extent.

Method used

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  • Thin-wall centrifugal concrete steel tube tower stress and finite element analysis method
  • Thin-wall centrifugal concrete steel tube tower stress and finite element analysis method
  • Thin-wall centrifugal concrete steel tube tower stress and finite element analysis method

Examples

Experimental program
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Effect test

Embodiment 1

[0052] In this embodiment, a corner tower is selected for finite element analysis, and its geometric, physical and load parameters are as follows:

[0053] Conductor and ground parameters

[0054] Wire model: LGJ-300 / 25

[0055] Cross-sectional area: 333.3mm2;

[0056] Maximum working stress: 40MPa;

[0057] Maximum use tension: 333.3×40MPa=13332N;

[0058] Ground wire model: GJ-50;

[0059] Cross-sectional area: 49.46mm2;

[0060] Maximum working stress: 155MPa;

[0061] Maximum working tension: 49.46×155MPa=7666.3N.

[0062] Geometry:

[0063] Top section: (outer diameter), ts=6mm, tc=32mm;

[0064] Bottom section: (outer diameter), ts=12mm, tc=37mm;

[0065] Tower height: 25m.

[0066] Calculation of the load conditions for the model

[0067] Pull force of the ground wire on the crossarm F1=4×sin45o×7666.3N=21683.57N

[0068] Action position: 25m from the bottom

[0069] Wire tension on the hanging card F2=2×sin45o×13332N=18854.30N

[0070] Action position...

Embodiment 2

[0087] In this embodiment, a corner tower is selected for finite element analysis, such as Figure 4 Shown is a schematic diagram of the wire tension direction of the pole tower described in this embodiment, and the strength, stiffness and dynamic characteristics of the corner tower are as follows:

[0088] Geometric, physical, load parameters

[0089] Wire and Bottom Line Parameters

[0090] Wire model: LGJ-300 / 25

[0091] Cross-sectional area: 333.3mm2;

[0092] Maximum working stress: 40MPa;

[0093] Maximum use tension: 333.3×40MPa=13332N.

[0094] Ground Wire Model: GJ-50

[0095] Cross-sectional area: 49.46mm2;

[0096] Maximum working stress: 155MPa;

[0097] Maximum working tension: 49.46×155MPa=7666.3N.

[0098] Geometry

[0099] Top section: (outer diameter), ts=6mm, tc=32mm;

[0100] Bottom section: (outer diameter), ts=16mm, tc=35mm;

[0101] Tower height: 31.5m.

[0102] Calculation of the load conditions for the model

[0103] Cross arm 1 upper g...

Embodiment 3

[0125] In this embodiment, a right-angled strain tower is selected for finite element analysis, and its wire tension direction is as follows: Figure 6 shown. Its strength, stiffness and dynamic characteristic parameters are shown below.

[0126] Geometric, physical, load parameters

[0127] Wire and Bottom Line Parameters

[0128] Wire model: LGJ-300 / 25

[0129] Cross-sectional area: 333.3mm2;

[0130] Maximum working stress: 80MPa;

[0131] Maximum use tension: 333.3×80MPa=26664N.

[0132] Ground Wire Model: GJ-50

[0133] Cross-sectional area: 49.46mm2;

[0134] Maximum working stress: 155MPa;

[0135] Maximum working tension: 49.46×155MPa=7666.3N.

[0136] Geometry

[0137] Top section: φ=260mm (outer diameter), t s =6mm,t c =32mm;

[0138] Bottom section: φ=852mm (outer diameter), t s = 10mm, t c= 35mm;

[0139] Tower height: 38.5m.

[0140] Calculation of the load conditions for the model

[0141] Wire wind load:

[0142] The resultant force of wind lo...

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Abstract

The invention belongs to the technical field of steel tube tower optimization, and particularly relates to a thin-wall centrifugal concrete steel tube tower stress and finite element analysis method,which comprises the following following steps:: firstly, establishing a finite element mathematical calculation model of a steel tube tower structure, and adopting a 3D hexahedron 8-node entity unit C3D8R as the finite element mathematical calculation model; calculating the standard design value of the bending moment applied to the bottom section of the steel tube tower according to the design parameters of the steel material performance, the wall thickness, the concrete performance and the wall thickness in the steel tube tower; and S3, inputting the data in the step S2 into the finite element mathematical calculation model established in the step S1 for calculation and analysis, and calculating the stress condition of each loading load part of each node under the action of the load. commercial finite element analysis software ABAQUS is utilized to calculate corresponding stress, deformation, vibration frequency and modality, and an original design scheme can be inspected.

Description

technical field [0001] The invention belongs to the technical field of steel pipe tower optimization, and in particular relates to a thin-wall centrifugal concrete steel pipe tower stress and finite element analysis method. Background technique [0002] Centrifugal steel tube concrete (Cnertiufge Conerete Filled Steel Tubular) structure is a branch of the steel tube and concrete composite structure. The lower end of the utility pole section is welded with a flange for fixed connection with the field anchor bolts, and the connection between each section of the utility pole is through flange or plug-in connection. Its main technical performance characteristics are: after combining steel and concrete into a new type of steel-concrete composite structure, the outer steel pipe uses the concrete lining of its inner wall to enhance the local stability of the pipe wall, and at the same time make the tensile side The stress distribution of the steel pipe is changed from a one-way te...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F119/14
CPCG06F30/23G06F2119/14
Inventor 耿进锋马磊时洪飞张武能汪毅王超张少锋崔大田王晓晨陈伟
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST