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A Nonlinear Calculation Method for Guyed Tower Cables

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: 2017-08-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Description
  • Claims
  • Application Information

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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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  • A Nonlinear Calculation Method for Guyed Tower Cables
  • A Nonlinear Calculation Method for Guyed Tower Cables
  • A Nonlinear Calculation Method for Guyed Tower Cables

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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 guy wire tower wires. The method equates the geometric nonlinearity of the guy wires into a multi-linear material nonlinear problem, and includes the following calculation steps: 1) According to the theory of the chord stress and chord deformation of the guy wires Calculate the relationship to obtain a series of discrete coordinate points about the chord-direction deformation and chord-direction stress of the stay wire; 2) The stay wire is equivalent to a material nonlinear rod element, and the stress of the rod element is a piecewise linear function of the strain, according to (1 ) to construct the piecewise function; 3) according to the piecewise function of the nonlinear material constitutive relation in (2), construct the multi-linear piecewise function of the stiffness of the cable; 4) through the nonlinear balance of the cable system Equation iterative solution. This method is a simplified processing method for the guy wire in the finite element calculation of the guy wire tower. Its calculation process is simple, the number of iterations is small, and the precision is high, which can be used for the analysis and calculation of the guy wire tower.

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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Patent Type & Authority Patents(China)
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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