CN-224227634-U - Low-frequency tuned mass damper with multi-layer spring

CN224227634UCN 224227634 UCN224227634 UCN 224227634UCN-224227634-U

Abstract

The utility model discloses a multi-layer spring low-frequency tuning mass damper which comprises a structural frame, a stiffness system and a mass block, wherein a mass block guide member and a spring guide member are arranged on the structural frame, the stiffness system comprises at least one group of multi-layer springs, each group of multi-layer springs comprises at least two layers of springs which are connected in series up and down, a spring limiting part is arranged between every two adjacent layers of springs, the mass block is mounted on a mounting plate, the multi-layer springs are supported below the mounting plate, the spring limiting parts are matched up and down along the spring guide member in a sliding mode, and the mounting plate is matched up and down along the mass block guide member in a sliding mode. The damping effect is good and the overall size is small.

Inventors

YANG CHAO
GAO HANG
WEI YU
ZHAO PENG
WEI XUEZHI
YANG RENMENG
HE JIARONG
TAO XU
WEI YONGLIN
XIONG GAOBO
XU HONGFEI
QIN ZEYU
Guan Haocheng

Assignees

柳州东方工程橡胶制品有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (10)

1. A multi-layer spring low frequency tuned mass damper comprising: The device comprises a structural frame (1), wherein a mass block guide member (4) and a spring guide member (5) are arranged on the structural frame; The stiffness system (2) comprises at least one group of multi-layer springs (6), each group of multi-layer springs (6) comprises at least two layers of springs (8) which are connected in series up and down, and a spring limiting part (7) is arranged between every two adjacent layers of springs (8); A mass block (3), the mass block (3) being mounted to a mounting plate (9); The multi-layer spring (6) is supported below the mounting plate (9), the spring limiting component (7) is in up-and-down sliding fit along the spring guide member (5), and the mounting plate (9) is in up-and-down sliding fit along the mass block guide member (4).
2. A multi-layer spring low frequency tuned mass damper according to claim 1, wherein the end of the spring stop means (7) is provided with a groove (10), the spring guide member (5) being snapped into the groove (10).
3. A multi-layer spring low frequency tuning mass damper according to claim 2, characterized in that the contact edge of the spring stop means (7) with the spring guide member (5) is provided with a rolling pair (25) or a sliding block (26), the spring stop means (7) sliding on the spring guide member (5) via the rolling pair (25) or the spring stop means (7) sliding on the spring guide member (5) via the sliding block (26).
4. A multi-layer spring low frequency tuned mass damper according to claim 1, wherein the mass guide member (4) is an upstanding guide shaft, the mounting plate (9) is provided with a slip ring (15), the slip ring (15) being sleeved outside the mass guide member (4).
5. A multi-layer spring low frequency tuned mass damper according to claim 1, characterized in that a damping system (16) is provided between the mass (3) and the structural frame (1).
6. A multi-layer spring low frequency tuned mass damper according to claim 5, wherein the damping system (16) is an eddy current damping (17), or a viscous damping (18), or a polymer damping (19).
7. A multi-layer spring low frequency tuned mass damper according to claim 1, wherein said spring stop member (7) spans two sets of said multi-layer springs (6) and connects said two sets of multi-layer springs (6).
8. A multi-layer spring low frequency tuned mass damper according to claim 1, wherein several sets of said multi-layer springs (6) center said mass (3).
9. A multi-layer spring low frequency tuned mass damper according to any of claims 1-8, further comprising an auxiliary plate (31), an auxiliary spring system (32), said auxiliary plate (31) being provided with a submerged recess (33), an outwardly extending wing (34) being provided at the upper edge of said recess (33), said auxiliary spring system (32) being supported under said wing (34), said stiffness system (2) being located on said recess (33).
10. A multi-layer spring low frequency tuned mass damper according to claim 9, wherein the auxiliary spring system (32) comprises at least one group of auxiliary spring groups (35), the auxiliary spring groups (35) comprise at least two layers of auxiliary springs (36) which are connected in series up and down, an auxiliary limiting component (37) is arranged between two adjacent layers of auxiliary springs (36), the structural frame (1) is provided with an auxiliary guiding component (38), and the auxiliary limiting component (37) is matched up and down along the auxiliary guiding component (38).

Description

Low-frequency tuned mass damper with multi-layer spring Technical Field The utility model relates to the technical field of structural vibration reduction, in particular to a multi-layer spring low-frequency tuning mass damper. Background With the progress of scientific technology, particularly the improvement of design method, construction technology and material performance, modern long-span bridges, particularly suspension bridges and cable-stayed bridges, are continuously developed towards the growth and enlargement direction. The main problem caused by the large increase of the bridge span is the steep decline of the structural rigidity, so that wind load, vehicle load and the like are easy to cause the vibration of the bridge structure, and the bridge stability, safety and usability are greatly influenced. The bridge vibration control measures are more in variety, and have active control measures and passive control measures, and have mechanical control measures and pneumatic control measures. But from a practical point of view, the use of Tuned Mass Dampers (TMD) for vibration damping would be an effective method. The vibration damping control device has the advantages of simplicity, reliability, effectiveness, simplicity and convenience in installation, easiness in maintenance and replacement and the like, and is widely applied to vibration damping control of civil engineering structures. However, the large-span bridge has the characteristic of flexibility, the main frequency is smaller, the main frequency is usually between 0.2Hz and 1Hz, the amplitude is larger than that of the pedestrian overpass, and the structural modal mass is large, so that the TMD structure matched with the bridge is larger in size, and even the installation and arrangement of the bridge on the bridge are influenced. Therefore, the low-frequency TMD has the advantages that the spring stiffness is low, the compression displacement is large during design, the existing structure can be divided into a single-layer spring and a multi-layer spring, the single-layer spring is easy to incline, bend and the like due to the large height-diameter ratio of the spring, even if a guide member is added, the spring is contacted with the guide member after being deformed, the anti-corrosion coating of the spring is damaged due to long-term vibration friction, the service life of the spring is shortened, and when the multi-layer spring is adopted, a mass block is mainly placed on the upper part of the multi-layer spring, so that the TMD structure is high in size, and too high TMD structure is difficult to arrange in a box girder which is in a flat shape for most of the box girder. The structure described in patent CN 111622368A, although solving the problem of TMD height dimension, brings about excessive springs laterally side by side, and brings about a new problem of larger lateral dimension. Disclosure of utility model The utility model aims to solve the technical problems of the prior art and provides the multi-layer spring low-frequency tuning mass damper which has good damping effect and small overall size. The technical scheme adopted by the utility model is as follows: A multi-layer spring low-frequency tuning mass damper comprises a structural frame, a stiffness system and a mass block, wherein a mass block guide member and a spring guide member are arranged on the structural frame, the stiffness system comprises at least one group of multi-layer springs, each group of multi-layer springs comprises at least two layers of springs which are connected in series up and down, a spring limiting part is arranged between every two adjacent layers of springs, the mass block is mounted on a mounting plate, the multi-layer springs are supported below the mounting plate, the spring limiting parts are in up-and-down sliding fit along the spring guide member, and the mounting plate is in up-and-down sliding fit along the mass block guide member. In one embodiment, the end of the spring limiting component is provided with a groove, and the spring guide member is clamped into the groove. In one embodiment, a rolling pair or a sliding block is arranged on the contact edge of the spring limiting component and the spring guiding component, and the spring limiting component slides on the spring guiding component through the rolling pair or slides on the spring guiding component through the sliding block. In one embodiment, the mass guide member is an upstanding guide shaft, and the mounting plate is provided with a slip ring which is sleeved outside the mass guide member. In one embodiment, a damping system is provided between the mass and the structural frame. In one embodiment, the damping system is eddy current damping, or viscous damping, or polymer damping. In one embodiment, the spring retainer member spans and connects two sets of the multi-layer springs. In one embodiment, the multi-layer springs of several sets surround the mass in the center.