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Nonlinear calculation method for guyed tower stay wire

A computing method and nonlinear technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as function difficulties, and achieve the effect of improving computing efficiency and reducing the number of iterations

Inactive Publication Date: 2015-01-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

This results in a secant stiffness K s( F) written as nodal displacement The function of is relatively difficult, so Newton's method cannot be used to iteratively solve the following equation

Method used

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  • Nonlinear calculation method for guyed tower stay wire
  • Nonlinear calculation method for guyed tower stay wire
  • Nonlinear calculation method for guyed tower stay wire

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Embodiment Construction

[0038] The invention specifically relates to a non-linear calculation method for guy wire towers. In the method, the geometric nonlinearity of the guy wires is equivalent to a multi-linear material nonlinear problem, and the guy wire processing during the guy wire tower calculation is simplified. When calculating the guy wires, firstly, according to the design conditions and design process of the guy wire towers, the chord-direction stress and chord-direction deformation of the guy wires are obtained, or in figure 1 The chord stress and chord deformation of the guy wire are tested in the guyed tower model. The tension of the actual pull wire varies along the length of the wire, but due to the small sag, it does not vary much. The initial tension here is taken as the stress component along the chord direction.

[0039] The specific calculation process includes the following steps:

[0040] 1) First, the length is l Establish the rod unit corresponding to each guy wire;

[...

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Abstract

The invention discloses a nonlinear calculation method for a guyed tower stay wire. The geometric nonlinearity of the stay wire is equivalent to a multi-linearity material nonlinear problem through the method, and the method includes the following steps that (1), according to the theoretical calculation relation between the chordwise stress and the chordwise deformation of the stay wire, a series of discrete coordinate points related to the chordwise deformation and the chordwise stress of the stay wire are obtained; (2), the stay wire is equivalent to a material nonlinear rod unit, the stress of the rod unit is a piecewise linear function of strain, and the piecewise linear function is constructed according to the discrete coordinate points in the step (1); (3), according to the piecewise function of the nonlinear material constitutive relation in the step (2), a multi-linearity piecewise function of the rigidity of the stay wire is constructed; (4), a nonlinear balance equation of a stay wire system is used for iteration solution. The nonlinear calculation method is a method for simplifying and processing the stay wire in the finite element calculation process of a guyed tower, the calculation process is simple, the number of iterations is small, accuracy is high, and the nonlinear calculation method can be used for analytical calculation of the guyed tower stay wire.

Description

technical field [0001] The invention relates to a simplified processing method for guy wires during guy wire tower calculation, and belongs to the technical field of guy wire numerical simulation, in particular to an equivalent multi-linear material nonlinear calculation method for guy wire tower guy wires. 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. [0003] With the increasing application of guyed towers, many scholars have carried out research on finite element modeling and static and dynamic analysis of guyed towers. The guyed tower mainly includes two parts:...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 杨文刚王璋奇朱伯文
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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