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Stress calculation method for power transmission tower nonlinear flexible member

A technology for transmission towers and flexible components, applied in computing, electrical digital data processing, special data processing applications, etc., can solve problems such as complex situations

Active Publication Date: 2015-01-21
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the actual situation is much more complicated, it is not the simulated linear model, and it is not that the fault point is on the node of the tower

Method used

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  • Stress calculation method for power transmission tower nonlinear flexible member
  • Stress calculation method for power transmission tower nonlinear flexible member
  • Stress calculation method for power transmission tower nonlinear flexible member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0131] Take " dry " font iron tower as example below, to verify the comparative situation of the present invention and actual situation. The results on the left are the maximum and minimum stresses of the "dry"-shaped iron tower calculated by the method proposed in this scheme, and the results on the right are the maximum and minimum stresses of the "dry"-shaped iron tower actually measured.

[0132]

[0133]

[0134] As can be seen from the above table, the calculation results obtained by the proposed method of the present invention are highly consistent with the actual results, indicating the effectiveness and technical potential of the method.

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Abstract

The invention discloses a stress calculation method for a power transmission tower nonlinear flexible member. The stress calculation method comprises the steps of firstly selecting a structural model and a material model according to the structural composition and material of a tower, respectively generating a stiffness matrix, a nodal displacement array and a nodal load array of tower member units according to each tower member unit and node displacement; secondly, adopting a finite increment method and a Newton iteration method to correct an obtained stress matrix and an obtained displacement matrix; finally, conducting Lagrange's interpolation on the stress matrix and the displacement matrix of the tower to obtain overall load and displacement of the tower and accordingly obtaining the stress at any point position in a tower structure. The stress calculation method directly conducts effective calculation on the stress of the power transmission tower nonlinear flexible member by means of a mathematical method and can provide an important scientific basis for safety evaluation of the tower structure.

Description

technical field [0001] The invention relates to a method for performing structural mechanics analysis on flexible components of a power transmission tower and accurately obtaining stress at any point on the tower, belonging to the field of safety evaluation of power transmission line operation states. Background technique [0002] The transmission line is the channel for the survival of the national power industry and related enterprises, and the safety evaluation of the transmission line plays a vital role in the stable operation of the entire power system. Due to the continuous development and innovation of the power industry, the level of transmission lines is getting higher and higher, and the terrain they pass is becoming more and more complex. They are easily disturbed by a series of complex situations such as natural geographical conditions and social conditions, and the stable operation of the lines has been greatly affected. hazards. Therefore, experts and scholars...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 龚灯才徐剑峰葛乐朱张蓓朱富云朱卫鞠易孙玉玮陆春锋樊立帆
Owner STATE GRID CORP OF CHINA
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