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A vibration-proof hammer control method for vortex-induced wind vibration of steel pipe components of electric power towers

A technology for power towers and control methods, which is applied to building components, towers, earthquake-proof and other directions, can solve problems such as poor economy and increase structural weight, and achieve the effects of significant control effect, prolong life, and simple design and calculation.

Active Publication Date: 2017-11-07
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The steel pipe tower structure adopts the method of controlling the critical wind speed of vibration or the slenderness ratio. It is necessary to select short and thick components with a small slenderness ratio in the structural design, which increases the weight of the structure to a certain extent and is not economical.

Method used

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  • A vibration-proof hammer control method for vortex-induced wind vibration of steel pipe components of electric power towers
  • A vibration-proof hammer control method for vortex-induced wind vibration of steel pipe components of electric power towers
  • A vibration-proof hammer control method for vortex-induced wind vibration of steel pipe components of electric power towers

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Embodiment 1

[0040] Such as Figure 1-2 As shown, the invention of this example is an anti-vibration hammer control method for vortex-induced wind vibration of a steel pipe member of a power tower, and the anti-vibration hammer includes a hammer head and a steel strand; the method includes the following steps:

[0041] (1) Determine the first-order natural vibration frequency of steel pipe components;

[0042] (2) Determine the first-order natural frequency of the anti-vibration hammer;

[0043] (3) matching the vibration frequency and the natural frequency;

[0044] (4) The anti-vibration hammer is installed on the steel pipe member.

[0045] According to the pipe diameter, length and end support mode of the steel pipe member, its first-order natural vibration frequency is calculated.

[0046] The first-order natural vibration circular frequency p of the steel pipe member 1 The calculation formula is:

[0047]

[0048] In the formula: D represents the outer diameter of the steel p...

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Abstract

The invention relates to a vibration preventing hammer control method for vortex-induced wind vibration of an electric power tower frame steel tube member. A vibration preventing hammer comprises a hammer head and a steel stranded wire. The vibration preventing hammer control method comprises the following steps of determining the first-order natural vibration frequency of the steel tube member; determining the first-order natural vibration frequency of the vibration preventing hammer; matching the vibration frequency with the natural vibration frequency; arranging the vibration preventing hammer on the steel tube member. The vortex-induced wind vibration control effect of the steel tube member is remarkable by means of the vibration preventing hammer control method. The vibration preventing hammer is simple in selection calculation and is simply and conveniently installed and implemented on an existing tower frame structure, and the safety and economical efficiency of the structure can be improved.

Description

Technical field: [0001] The invention relates to a method for controlling an anti-vibration hammer, and more particularly relates to a method for controlling an anti-vibration hammer for vortex-induced wind vibration of a steel pipe member of a power tower. Background technique: [0002] The lateral flow around the cylinder will generate a vortex behind the cylinder, and the motion characteristics of the vortex are determined by the Reynolds number Re of the cylinder in the wind flow. When 40≤Re<3×10 5 When it is in the subcritical range, two rows of vortices are generated behind the cylinder, alternately staggered, opposite in direction of rotation, constant in spacing, and periodically shed. The shedding wind force generated by vortex shedding will make the column move in the cross-wind direction. When the dominant frequency of vortex shedding is close to a certain natural frequency of the cylinder, vortex induced resonance occurs. Vortex-induced vibration has the ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04H12/08E04B1/98
CPCE04B1/98E04H12/08
Inventor 杨靖波杨风利韩军科刘胜春张宏杰
Owner STATE GRID CORP OF CHINA
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