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Device for inhibiting power transmission line steel tube pole tower vortex-induced wind vibration and method thereof

A transmission line steel pipe and suppression device technology, which is applied to towers, building components, building types, etc., can solve problems such as accumulation of damage, loose bolt connections, and reduction of vibration wind speed, and achieves good control effect, convenient maintenance, and simple structure. Effect

Active Publication Date: 2010-03-17
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

But on the other hand, reducing the limit value of the onset wind speed will inevitably increase the vibration probability of some rods with larger slenderness ratios.
Breeze vibration will not directly cause damage to the tower structure, but its damage is cumulative. After a certain period of time, it will cause loosening of the bolts at the ends of the rods and the connecting flanges of the rods, and fatigue damage to the welds.

Method used

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  • Device for inhibiting power transmission line steel tube pole tower vortex-induced wind vibration and method thereof
  • Device for inhibiting power transmission line steel tube pole tower vortex-induced wind vibration and method thereof
  • Device for inhibiting power transmission line steel tube pole tower vortex-induced wind vibration and method thereof

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Experimental program
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Effect test

Embodiment Construction

[0027] Table 1 below lists test results according to different embodiments of the present invention:

[0028] Table 1 Vibration amplitude of steel pipe members with different node structures (mm)

[0029]

[0030] The results in Table 1 show that, near the critical wind speed of vibration, the vibration reduction effect of the helical cable ring is the best, followed by the short rib, and relatively speaking, the fin plate is worse. Its structure is as image 3 shown.

[0031] Welding short ribs of steel pipe components increases the workload of design and manufacture. Winding the helical spoiler wire is easy and convenient for engineering application. Therefore, it is recommended to wrap spoiler wires on the surface of the steel pipe members that generate breeze vibrations to change the conditions for breeze resonance.

[0032] attached figure 1 It is a schematic diagram of controlling the breeze vibration of a steel pipe member by a helical circular cross-section spo...

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Abstract

The invention provides a device for inhibiting horizontal wind direction vortex-induced wind vibration of a conical pole piece such as a steel tube transmission tower and the like with the circular-tube-shaped cross section or outer gradient less than 2%, and a method thereof. A jack rib, a fin keel or a spiral circular cross-section current disturbing wire is adopted to be wound on the surface of a steel tube, and a method for selecting and arranging the spiral current disturbing wire comprises: a spiral line has the diameter of D / 10 and the pitch of 12D, wherein D represents the outer diameter of the steel tube pole piece. Furthermore, the spiral line current disturbing device has simple structure, easy installation and maintenance as well as low cost, simultaneously control one stage and two-stage breeze vibration of the large slenderness ratio pole pieces, and is good in effect.

Description

technical field [0001] The invention relates to the technical field of power transmission line equipment, in particular to a device and method for suppressing vortex-induced wind vibration of a steel pipe pole tower of a power transmission line. The invention can suppress the vortex-induced wind vibration in the cross-wind direction of the circular pipe with the same cross-section of the steel pipe transmission tower or the conical rod with an outer slope of less than 2%. Background technique [0002] The wind vibration of the tower of the overhead transmission line includes the downwind vibration of the whole tower and the cross wind vibration of the local steel pipe members. The invention relates to a method for controlling wind vibration in the cross wind direction of a power transmission tower, and belongs to the category of passive control of structural vibration. [0003] The lateral flow around the cylinder will generate a vortex behind the cylinder, and the motion c...

Claims

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Application Information

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IPC IPC(8): E04H12/08E04B1/98
Inventor 杨靖波李正王景朝韩军科杨风利
Owner CHINA ELECTRIC POWER RES INST
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