Single-column stay wire tower torsion frequency estimation method based on single degree of freedom model

A technology of torsional vibration frequency and guyed towers, which is applied in the field of guyed towers, can solve the problems that there are no relevant reports on the study of the natural vibration characteristics of single-column guyed towers, and achieve the effect of simplifying the calculation process

Active Publication Date: 2015-04-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

At present, the research on the dynamic characteristics of the single-column guyed tower is mainly the dynamic response of the single-column guyed tower under various wind loads. There are no relevant reports on the study of the natural vibration characteristics and mechanism of the single-column guyed tower.

Method used

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  • Single-column stay wire tower torsion frequency estimation method based on single degree of freedom model
  • Single-column stay wire tower torsion frequency estimation method based on single degree of freedom model
  • Single-column stay wire tower torsion frequency estimation method based on single degree of freedom model

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Embodiment

[0087] Taking the single-column cable tower recommended for use in the design and planning of an UHV transmission line of the State Grid as an example, the torsional vibration frequency of the single-column cable tower is calculated. The engineering conditions are shown in Table 1, and the initial stress of the cable is 125MPa. , with an angle of 50° to the ground.

[0088] Table 1 Engineering conditions

[0089]

[0090] The single-degree-of-freedom torsional vibration model is used to calculate the torsional vibration frequency of the guyed tower, and compared with the calculation results of the finite element method.

[0091] The process of calculating the torsional stiffness of the guyed cable system with the finite element method is as follows: (1) The guyed system is simulated by the refinement method based on the bilinear rod element, and the finite element model of the single-column guyed tower is established; Torque is applied to the single-column cable tower, and...

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Abstract

The invention discloses a single-column stay wire tower torsion frequency estimation method based on a single degree of freedom model and belongs to the technical field of stay wire towers. According to the single-column stay wire tower torsion frequency estimation method, the single degree of freedom model is utilized to simulate torsion of a stay wire tower, the torsion stiffness of a main column is higher than the torsion stiffness of a stay wire system in a extra-high voltage single-column stay wire tower, torsional deformation of the main column is ignored, computation formulae of the stay wire system, the torsion stiffness of the main column and a stay wire system rotational inertia are deduced on the basis of a torsional vibration mechanism of the single-column stay wire tower, the correctness of the computation formulae and the reasonability of model simplification are verified through comparison between a computation result and a finite element simulation result, and the single-column stay wire tower torsion frequency estimation method can be used for single-column stay wire tower torsion frequency estimation.

Description

technical field [0001] The invention relates to a method for estimating the torsional vibration frequency of a cable tower, belonging to the technical field of cable towers, in particular to a method for estimating the torsional vibration frequency of a UHV single-column cable tower by using a single-degree-of-freedom torsional vibration model. Background technique [0002] The development of UHV power transmission can meet the needs of large-scale, cross-regional and long-distance power transmission. UHV guyed tower has the advantages of simple structure, good mechanical performance, superior economic index, convenient construction, etc., and has good application prospects. UHV lines in my country should use guyed towers. Compared with other types of DC UHV cable towers such as double-column suspension cable cable towers and door-type cable towers, the single-column cable tower has the advantages of relatively small footprint, simple structure, and clear force. The single-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 杨文刚王璋奇朱伯文
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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