Search

CN-122014801-A - Vibration damper for simultaneously controlling two-order vibration of wind power tower

CN122014801ACN 122014801 ACN122014801 ACN 122014801ACN-122014801-A

Abstract

The invention discloses a damper for simultaneously controlling two-order vibration of a wind power tower, which comprises the wind power tower, a first-order vibration module and a second-order vibration module, wherein the first-order vibration module and the second-order vibration module are arranged in the wind power tower, the first-order vibration module comprises a first-order vibration mass block and a shape memory alloy variable stiffness support, the first-order vibration mass block is suspended through a sling, a U-shaped liquid channel is formed by the inner part of the first-order vibration mass block in a separation mode to realize liquid tuning control, the second-order vibration module comprises a second-order vibration mass block and an inertial damper, the second-order vibration mass block is connected with the bottom surface of the first-order vibration mass block through a prestress zip, and a bowl-shaped swinging mass block is arranged in the second-order vibration mass block and is filled with liquid. According to the invention, the prestress zipper is connected with the two-order vibration type mass blocks in series, so that the two-order vibration type linkage control and the first-order vibration type mass synergy are realized, the shape memory alloy stiffness-changing support is utilized to provide nonlinear stiffness changing and automatic resetting, the inertia Rong Zuni device and the swinging mass blocks are matched to enhance the second-order vibration type control effect, and the wind-induced vibration response is effectively inhibited in a limited tower space.

Inventors

  • GENG YAN
  • RONG HUA
  • CHEN XI
  • Fan Xinglang
  • ZHANG XUAN
  • DU YANG
  • XIE CHONGFENG
  • JIANG YU

Assignees

  • 中冶建筑研究总院有限公司

Dates

Publication Date
20260512
Application Date
20260408

Claims (10)

  1. 1. The shock absorber for simultaneously controlling the two-order vibration of the wind power tower comprises a wind power tower (1) and is characterized by further comprising a first-order vibration module (2) and a second-order vibration module (3) which are arranged inside the wind power tower (1); The first-order vibration type module (2) comprises a first-order vibration type mass block (21) and shape memory alloy variable stiffness supports (22), wherein the top surface of the first-order vibration type mass block (21) is connected with the inner top wall of the wind power tower (1) through slings (23), two cavities which are arranged up and down are formed in the first-order vibration type mass block (21) in a separated mode, liquid tuning control is achieved through U-shaped liquid channels (211) formed in the cavities, the number of the shape memory alloy variable stiffness supports (22) is multiple, the shape memory alloy variable stiffness supports (22) encircle the first-order vibration type mass block (21) and are connected with the inner side wall of the wind power tower (1), and the shape memory alloy variable stiffness supports (22) are all in butt joint with the outer wall of the first-order vibration type mass block (21); The second-order vibration type module (3) comprises a second-order vibration type mass block (31) and an inertial damper (32), wherein the top surface of the second-order vibration type mass block (31) is connected with the bottom surface of the first-order vibration type mass block (21) through a prestress zipper (33), the second-order vibration type mass block (31) is hollow and filled with liquid, a bowl-shaped swinging mass block (34) is arranged in the second-order vibration type mass block (31), the number of the inertial dampers (32) is multiple, and the inertial dampers (32) are arranged around the second-order vibration type mass block (31) and are connected between the outer side wall of the second-order vibration type mass block (31) and the inner side wall of the wind power tower (1).
  2. 2. A damper for simultaneously controlling two-stage vibration of a wind power tower according to claim 1, wherein the first-stage vibration mass block (21) is in a drum-type structure with a narrow upper and a wide lower middle, the inside of the first-stage vibration mass block (21) is divided into an upper chamber and a lower chamber by a horizontal partition plate (212), the upper chamber and the lower chamber are respectively fixed with a separation shell (214) by a support rod (213), a gap is formed between the separation shell (214) and the chambers, and liquid can be injected into the gap to form the U-shaped liquid channel (211).
  3. 3. A damper for simultaneously controlling two-order vibration of a wind power tower according to claim 3, wherein the liquid surfaces of both said U-shaped liquid passages (211) are covered with an annular cover plate (215).
  4. 4. A damper for simultaneously controlling two-order vibration of a wind power tower according to claim 3, wherein the liquid in the U-shaped liquid channel (211) and the liquid in the second-order vibration mass block (31) are both simethicone.
  5. 5. The shock absorber for simultaneously controlling two-order vibration of a wind power tower according to claim 1, wherein the shape memory alloy stiffness varying support (22) is of an arch structure, and an arch side of the shape memory alloy stiffness varying support (22) is abutted against an outer side wall of the first-order vibration mass block (21).
  6. 6. The shock absorber for simultaneously controlling two-order vibration of a wind power tower according to claim 5, wherein the shape memory alloy variable stiffness support (22) is connected with the wind power tower (1) through a groove-shaped fixing frame (24), one side of the groove-shaped fixing frame (24) is fixed with the wind power tower (1), a notch (241) is formed in the other side of the groove-shaped fixing frame (24), and the upper end and the lower end of the shape memory alloy variable stiffness support (22) are respectively clamped in the notch (241) so that the shape memory alloy variable stiffness support (22) forms the arch structure.
  7. 7. The shock absorber for simultaneously controlling two-order vibration of a wind power tower according to claim 1, wherein two ends of the prestress zipper (33) are respectively connected with the top surface of the second-order vibration mass block (31) and the bottom surface of the first-order vibration mass block (21) through anchoring pieces (35).
  8. 8. A damper for simultaneously controlling two-order vibration of a wind power tower according to claim 1, wherein the bowl-shaped swinging mass block (34) is of a solid structure, and the arc-shaped bottom surface of the bowl-shaped swinging mass block is arranged on the inner bottom surface of the second-order vibration mass block (31).
  9. 9. A damper for simultaneously controlling two-order vibration of a wind power tower according to claim 1, wherein the first-order vibration mass block (21) is located at the top of the wind power tower (1), and the second-order vibration mass block (31) is located at the middle of the wind power tower (1).
  10. 10. A damper for simultaneously controlling two-order vibration of a wind power tower according to claim 9, wherein the length of the pre-stressed zip (33) is greater than the length of the slings (23).

Description

Vibration damper for simultaneously controlling two-order vibration of wind power tower Technical Field The invention relates to the technical field of wind power towers, in particular to a damper for simultaneously controlling two-order vibration of a wind power tower. Background Wind power energy is one of renewable clean energy sources, and has attracted extensive attention and research in countries around the world. Along with the continuous iterative progress of the wind driven generator, the height of the wind power tower is gradually increased, the tower top quality is gradually increased, so that the wind power tower structure is of a high-flexibility structure, the structural response is more remarkable under the action of wind load, even the normal operation of the whole wind power tower structure can be influenced, the wind-induced vibration response of the wind power tower cylinder structure is controlled, the problem to be solved is solved urgently, and the research and development of the control device is one of important links. At present, a tuned mass damping system is a main technical means for controlling wind vibration response of a wind power tower, and a great deal of researches and patents are available for the method. But limited by the installation space of the tower, at present, no device can control the first-order vibration mode and the second-order vibration mode of the wind power tower at the same time, and the wind vibration response of the high-flexibility tower can be effectively controlled only by simultaneously controlling the first two-order vibration modes. There are two important problems with the prior art: Firstly, because the tower drum is limited in installation space, an independent mass system cannot realize the large mass requirement meeting the vibration reduction requirement. In order to solve the problem, the mass for controlling the first-order vibration mode and the mass for controlling the second-order vibration mode are connected through the prestress inhaul cable, so that the control mass of the first-order vibration mode is greatly increased under the condition that the installation space is not increased, meanwhile, the inertia damper is additionally arranged at the control position of the second-order vibration mode, so that the mass efficiency is improved, and the mass for controlling the second-order vibration mode can be greatly increased. Secondly, the control problem of the first-order vibration mode or the second-order vibration mode of the wind power tower can only be solved in the prior art, and simultaneous control of the two vibration modes cannot be realized. For a tower with high flexibility, wind vibration response can be effectively controlled by controlling the two-order vibration mode. Therefore, in order to solve the problems that the installation space is limited, which results in insufficient quality and the wind power tower can not control the first-order and second-order vibration modes simultaneously in the prior art, the invention provides a vibration damper technology capable of realizing the two-order vibration mode linkage control and effectively enhancing the control quality without increasing the installation space, which is a problem to be solved by those skilled in the art. Disclosure of Invention In view of the above, the present invention provides a damper for simultaneously controlling two-order vibration of a wind power tower, which aims to solve the above-mentioned technical problems. In order to achieve the above purpose, the present invention adopts the following technical scheme: The shock absorber for simultaneously controlling the two-order vibration mode vibration of the wind power tower comprises the wind power tower, a first-order vibration mode module and a second-order vibration mode module, wherein the first-order vibration mode module and the second-order vibration mode module are arranged in the wind power tower; The first-order vibration type module comprises a first-order vibration type mass block and shape memory alloy variable stiffness supports, wherein the top surface of the first-order vibration type mass block is connected with the inner top wall of the wind power tower through a sling, two cavities which are arranged up and down are formed in the first-order vibration type mass block in a separated mode, and liquid tuning control is realized through U-shaped liquid channels formed in the cavities; The second-order vibration type module comprises a second-order vibration type mass block and an inertia-volume damper, wherein the top surface of the second-order vibration type mass block is connected with the bottom surface of the first-order vibration type mass block through a prestress zipper, the second-order vibration type mass block is hollow and filled with liquid, a bowl-shaped swinging mass block is arranged in the second-order vibration type mass block, the number of the inertia-volume Rong Z