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Vibration reduction method for aeolian vibration of circular tube components of power transmission tower

A technology for transmission towers and circular pipes, which is applied to building components, towers, and anti-vibration, can solve problems such as high cost, unsuitable vibration damping, and complex structure of vibration shock absorbers. The effect of vibration reduction effect

Active Publication Date: 2021-07-23
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the above-mentioned vibration damper is relatively complicated, and the cost is high, so it is not suitable for the vibration reduction of multiple round rod members on the transmission tower.
At present, there is still a lack of a simple and effective method to suppress the vibration of round rod members.

Method used

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  • Vibration reduction method for aeolian vibration of circular tube components of power transmission tower
  • Vibration reduction method for aeolian vibration of circular tube components of power transmission tower
  • Vibration reduction method for aeolian vibration of circular tube components of power transmission tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 2 , 3 And 4, an adjustable inerter A, including a bracket 1, a flywheel 4 and a rotating drive mechanism 2 are installed on the bracket 1, and the two are connected by transmission. The rotation driving mechanism 2 is provided with a first connecting end for connecting with the vibrating member; the support 1 is provided with a second connecting end for connecting with the fixing member. The vibration of the vibrating part is transmitted to the flywheel 4 through the rotating drive mechanism 2 and the speed-increasing transmission mechanism to make it rotate, and the inertial force of the adjustable inerter container A reversely acts on the vibrating part to suppress its vibration.

[0038] In order to increase the inertial force of the adjustable inerter A and make its inertial force adjustable, a speed-increasing transmission mechanism is arranged between the rotating drive mechanism 2 and the flywheel 4, and the speed-increasing transmission mechanis...

Embodiment 2

[0057] A vibration damping method for the wind vibration of the circular tube member of the transmission tower, using the adjustable inerter described in Embodiment 1, comprising the following steps:

[0058] Step 1, understanding the on-site meteorological information, conducting on-site investigation and determining the circular tube member 5 that needs to be damped on the transmission tower B, and judging the vibration direction of the circular tube member 5;

[0059] Step 2, select at least one iron tower fixing part 6 close to the round pipe member 5 for each of the round pipe members 5 on the transmission tower B, so as to connect the round pipe member 5 and the iron tower fixing part Install adjustable inerter A between 6;

[0060] Step three, such as figure 1 with 2 , to install the adjustable inerter container A: for the convenience of connection, the first connection end is provided with a pipe sleeve 2c, and the pipe sleeve 2c is sleeved on the circular pipe membe...

Embodiment 3

[0073] The ANSYS finite element model is used to study the vibration reduction effect of the above adjustable inerter. This simulation takes an UHV AC transmission line project as the research object, and selects the round pipe member 5, which frequently experiences breeze vibration in the UHV AC transmission line, for research. Its size parameters and constraints are shown in Table 1.

[0074] Table 1 Parameter table of circular tube components

[0075]

[0076] In this simulation, the relevant parameters of the adjustable inerter A are shown in Table 2. In the simulation tests 1-3, the value of the inerter characteristic b is only changed by changing the quality of the flywheel 4 . Under the corresponding conditions, the vibration amplitude of the circular tube member 5 is as follows Figure 5 shown. It can be seen that under the condition that the inerter is not installed, that is, b=0, the vibration amplitude of the circular tube member 5 is about 15mm after stabiliz...

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Abstract

The invention discloses a vibration reduction method for aeolian vibration of circular tube components of a power transmission tower. The vibration reduction method comprises the following steps firstly, field investigation is carried out, and the circular tube components needing to be subjected to vibration reduction on the power transmission tower are determined, then at least one iron tower fixing part close to the circular tube components is selected for each circular tube component on the power transmission tower, and then an adjustable inerter is installed between the circular tube components and the iron tower fixing parts so as to restrain vibration of the circular tube components. The method has the beneficial effects that the used inerter is simple in structure, low in economic cost and convenient to use, the inertia force characteristic of the inerter is easily adjusted by adjusting the structure of the inerter, the vibration reduction requirements of the power transmission tower circular tube components are met, and simulation experiments and engineering practice prove that the inerter can achieve the ideal vibration reduction effect.

Description

technical field [0001] The invention belongs to the technical field of wind-vibration protection for transmission tower components, and in particular relates to a vibration reduction method for wind-vibration of transmission tower circular tube components. Background technique [0002] A transmission tower is a steel structure building used to support cables, generally connected by rods, pipes, and plates. The safety of the transmission tower is the basis for the safety of the entire transmission line. Meteorological conditions are important external factors affecting the safety of transmission towers, among which the wind vibration phenomenon of rods and pipes is one of the most common factors affecting the safety of transmission towers, and its vibration mechanism is complex. Suppressing wind vibration is of great significance for improving the safety of transmission towers. For the circular tube member of the transmission tower, because it will vibrate perpendicular to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/98E04H12/00E04H12/10G06F30/13G06F30/23
CPCE04B1/98E04H12/00E04H12/10G06F30/13G06F30/23
Inventor 刘欣鹏李昌茂晏致涛孙毅樊佳钟永力赵爽李妍王灵芝罗钧聂小春
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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