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Elliptic-type thin-walled structure tuned mass damper used for vibration control of bridge stay cable

A technology of tuning mass damping and vibration control, which is applied to bridges, bridge parts, bridge forms, etc., can solve the problems of poor vibration damping effect, complex theoretical analysis, and inability to guarantee mass blocks, etc., to achieve simple structure, simplified theoretical analysis, High torque rigidity effect

Active Publication Date: 2017-11-17
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that the stiffness and mass block of the TMD in the common structure form are vertically downward, so that the mass block cannot be guaranteed to move perpendicularly to the cable during the vibration process, which makes the theoretical analysis more complicated and the vibration damping effect deteriorates. problem, and then proposed an elliptical thin-walled structure tuned mass damper for bridge cable vibration control

Method used

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  • Elliptic-type thin-walled structure tuned mass damper used for vibration control of bridge stay cable
  • Elliptic-type thin-walled structure tuned mass damper used for vibration control of bridge stay cable
  • Elliptic-type thin-walled structure tuned mass damper used for vibration control of bridge stay cable

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specific Embodiment approach 1

[0013] Specific implementation mode one: combine figure 1 with figure 2 To illustrate this embodiment, the elliptical thin-walled structure tuned mass damper for bridge cable vibration control described in this embodiment includes a cable sleeve 1, a mass cylinder 2, an adjustable mass 3 and four steel cylinders 4, The cable sleeve 1 is inserted in the mass cylinder 2, the adjustable mass block 3 is fixedly installed on the inner wall of the mass cylinder 2, and the four steel cylinders 4 are evenly arranged on the outer wall of the cable sleeve 1 and the mass cylinder 2 along the circumferential direction. between the inner walls.

specific Embodiment approach 2

[0014] Specific implementation mode two: combination figure 1 with figure 2 Describe this embodiment, the diameter of the cable sleeve 1 of the elliptical thin-walled structure tuned mass damper used for bridge cable vibration control in this embodiment is determined by the outer diameter of the stay cable, and the wall thickness of the cable sleeve 1 is determined according to The project needs to choose 3~10mm.

specific Embodiment approach 3

[0015] Specific implementation mode three: combination image 3 with Figure 4 To illustrate this embodiment, the cross section of the steel cylinder 4 of the elliptical thin-walled tuned mass damper used for vibration control of bridge cables in this embodiment is elliptical. According to the dynamic characteristics and vibration control requirements of the stay cables, the major axis and minor axis dimensions of the elliptical steel cylinder section and the wall thickness of the steel cylinder are determined. Using the energy method, according to image 3 Calculate the force-displacement relationship curve in the horizontal direction (x~F x (x)), and use the third-degree polynomial fitting results respectively as the force and deformation model of the steel cylinder 4 in the horizontal direction. Using the energy method, according to Figure 4 Calculate the force-displacement relationship curve in the vertical direction (y~F y (y)), and the second degree polynomial fitt...

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Abstract

The invention relates to elliptic-type thin-walled structure tuned mass dampers, in particular to an elliptic-type thin-walled structure tuned mass damper used for vibration control of a bridge stay cable. The elliptic-type thin-walled structure tuned mass damper is used for solving the problems that a rigidity block and a mass block of a tuned mass damper (TMD) of a common structure form are arranged vertically downwards so that it cannot be guaranteed that the mass block moves in a mode of being vertical to the stay cable all the time in the vibration process, consequently, theoretical analysis is complicated, and the vibration reduction effect is poor. The elliptic-type thin-walled structure tuned mass damper comprises a stay cable sleeve, a mass cylinder, adjustable mass blocks and four steel cylinders. The stay cable sleeve is inserted in the mass cylinder, the adjustable mass blocks are fixedly installed on the inner wall of the mass cylinder, and the four steel cylinders are evenly distributed and arranged between the outer wall of the stay cable sleeve and the outer wall of the mass cylinder in the circumferential direction. The invention belongs to the field of road bridge construction.

Description

technical field [0001] The invention relates to an elliptical thin-walled structure tuned mass damper, in particular to an elliptical thin-walled structure tuned mass damper used for vibration control of bridge cables, belonging to the field of road and bridge construction. Background technique [0002] With the globalization of economic development, urban construction is also constantly developing. While building a large number of major projects, we are also facing many challenges. How to effectively control the large-scale vibration of structures under the action of wind, rain, earthquakes, etc. has become a domestic The focus of foreign scholars' attention. As the core structure of the national transportation system, the bridge structure is directly related to the interests of the country, and even the safety and vital interests of the general public. [0003] Cable-stayed bridges are the most representative. Cable-stayed bridges are also called cable-stayed bridges. The...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D11/04E01D19/16
CPCE01D11/04E01D19/00E01D19/16
Inventor 张东昱刘朝硕
Owner HARBIN INST OF TECH
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