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Finite element analysis method for stress performance of high-strength double-angle steel combined section component

A technology of combined section and analysis method, which is applied in the field of finite element analysis of the mechanical performance of high-strength double-angle steel composite cross-section members, can solve the problem that the mechanical performance of components cannot be fully reflected, the test cannot meet the needs of research, and the test results are representative. Not strong and other problems, to achieve the effect of satisfying the calculation accuracy, improving the efficiency, stability and solving efficiency of the solution

Inactive Publication Date: 2020-01-14
CHONGQING YUHUANG ELECTRIC POWER EQUIP MFG +1
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Problems solved by technology

[0002] At present, angle steel transmission towers are mainly used in my country. With the construction of large-section conductor projects and large-span projects, the load of transmission towers is increasing. There is a large-load transmission tower test for the bearing capacity of double-angle steel composite sections. However, due to the limitation of test costs and other factors, The number of specimens is relatively small. At this time, the representativeness of the test results is not strong, and the mechanical performance of the components cannot be fully reflected. The limited tests cannot meet the needs of the research, so it is necessary to conduct research through numerical simulation.

Method used

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  • Finite element analysis method for stress performance of high-strength double-angle steel combined section component
  • Finite element analysis method for stress performance of high-strength double-angle steel combined section component
  • Finite element analysis method for stress performance of high-strength double-angle steel combined section component

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Embodiment

[0029] A finite element analysis method for the mechanical performance of a high-strength double-angle steel composite section member includes the following steps:

[0030] Such as figure 1 As shown, the geometric model of the cross-section member with double angle steel is established, and the shell element of SHELL181 is used to simulate the angle steel. The loose ratio is taken as 0.3, and the stress-strain relationship of the component material adopts the ideal elastic-plastic material model, that is, the double-broken model. In order to make the simulation closer to the actual situation, the tower plates at both ends of the component are added to the model to avoid stress concentration during It appears that the elastic modulus of the end plates at both ends of the component is increased to E=2.06e7MPa. The shell element has more advantages than the solid element in simulating such small and medium-thickness components. The calculation accuracy can meet the engineering re...

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Abstract

The invention discloses a finite element analysis method for the stress performance of a high-strength double-angle-steel combined section component. The finite element analysis method comprises: establishing a geometric model of a double-angle-steel cross-shaped combined section component; carrying out finite element mesh generation on the geometric model; applying constraints to the geometric model; selecting an end plate area to apply load; and gradually performing loading and solving by adopting an arc length method. The relative difference between the bearing capacity limit value calculated by the analysis method and the bearing capacity limit value obtained by the test is basically controlled within 10%; from the comparison of two aspects of a component damage mode and ultimate bearing capacity, the finite element model established by the method can be used for analyzing the stress performance of the double-angle steel combined component, and reference is provided for the designof a power transmission tower.

Description

technical field [0001] The invention relates to the technical field of angle steel tower design, in particular to a finite element analysis method for the mechanical performance of a high-strength double angle steel composite section member. Background technique [0002] At present, angle steel transmission towers are mainly used in my country. With the construction of large-section conductor projects and large-span projects, the load of transmission towers is increasing. There is a large-load transmission tower test for the bearing capacity of double-angle steel composite sections. However, due to the limitation of test costs and other factors, The number of specimens is relatively small. At this time, the representativeness of the test results is not strong, and the mechanical performance of the components cannot be fully reflected. The limited tests cannot meet the needs of the research. Therefore, it is necessary to conduct research through numerical simulation. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F119/14
Inventor 刘红军刘蜀宇
Owner CHONGQING YUHUANG ELECTRIC POWER EQUIP MFG
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