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Calculation method of finite element model of simplified guyed tower main column

A calculation method, the technology of the cable tower, applied in the direction of calculation, design optimization/simulation, special data processing applications, etc., can solve the problems of large amount of calculation, large number of units, etc., to ensure calculation accuracy, improve calculation efficiency, and reduce calculation volume effect

Inactive Publication Date: 2016-03-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large number of units in this refined model, the amount of calculation in the analysis of the nonlinear dynamic characteristics of the tower line system is very large

Method used

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  • Calculation method of finite element model of simplified guyed tower main column
  • Calculation method of finite element model of simplified guyed tower main column
  • Calculation method of finite element model of simplified guyed tower main column

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Taking a main column of a cable-stayed tower recommended for an UHVDC transmission line as an example, the static and dynamic characteristics of the precise model and the simplified beam-column model are compared.

[0085] The total height of the main column of the suspension cable stay tower is 54.531m. Figure 4 shown. In order to facilitate the model constraints, the slope change part at the lower end is ignored, and the total height after ignoring is 50.531m, with a total of 6 sections. The layout of the inclined material of the main column is as follows Figure 3c shown. According to the simplified model in the present invention, the tensile and compressive stiffness, bending stiffness, torsional stiffness and additional mass distribution per unit length of the main column of the suspension cable stay tower are calculated. The parameters involved in the calculation of the main column are shown in Table 1, and the calculation results are listed in Table 2.

[008...

Embodiment 2

[0101] The single-column guy tower recommended for a UHV DC transmission line is as follows: Figure 9 As shown, the single-column guyed tower is 51m high and remains upright under the action of eight groups of guyed wires. Based on ANSYS, the precise model and simplified model of the UHV single-column guyed tower are established, as shown in Figure 10. The main material and the diaphragm in the accurate model will generate bending moments when they are stressed, so the beam element is used for simulation. The beam element has two nodes, and each node has six degrees of freedom; the oblique material mainly bears the axial force , it can be regarded as a two-force rod, so the rod element is used for simulation. The rod element has two nodes, and each node has three degrees of freedom; the guy wire is a typical flexible cable structure, which bears neither bending moment nor pressure , only bears tension, so it is simulated with a rod element that can only bear tension.

[010...

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Abstract

The invention discloses a calculation method of a finite element model of a simplified guyed tower main column. In the finite element model, the latticed main column is simplified into an equivalent beam column model; and the constructed beam column model, which is equivalent to the latticed main column in pull-pressing rigidity, bending rigidity, torsional rigidity and additional mass distribution, is suitable for nonlinear dynamic analysis of a tower-line system. Therefore, under the premise of ensuring calculation accuracy, calculation quantity is reduced, and calculation efficiency is improved.

Description

technical field [0001] The invention relates to a simplified calculation method of the finite element model of the main column of the guyed tower, which belongs to the technical field of numerical simulation of the guyed tower, in particular to a method for simplifying the equivalent beam-column model of the finite element analysis of the main column of the guyed tower. Background technique [0002] Since the beginning of the 21st century, with the development of my country's western development, the construction of transmission lines in Northwest China has further accelerated the pace. A large part of the lines in this area have to pass through flat and sparsely populated areas such as the Gobi Desert and grasslands. The use of guyed towers has obvious economic advantages, and the application of guyed towers is increasing. Compared with other types of cable towers, the UHV single-column cable tower has the advantages of simple structure, reasonable force, convenient constru...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 杨文刚朱伯文高松
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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