Tuning cable type damper for multi-mode vibration control of high-rise structure

Abstract

The invention relates to a tuning cable type damper for multi-mode vibration control of a high-rise structure, which is characterized in that a plurality of mass blocks are arranged on a cable structure at intervals along the length direction of the cable structure, so that the mass blocks can be suspended in an internal space of a rigid enclosure wall through the cable structure, and the upper end of the cable structure is connected to the top of the high-rise structure; the rigid enclosure wall is fixed to the top of the high-rise structure, when the high-rise structure vibrates, the cable structure shakes and deforms, when the amplitude is small, the mass blocks can compress and stretch the tension and compression energy dissipation pieces between the adjacent mass blocks to dissipate energy, when the amplitude is large, the mass blocks collide with the rigid enclosure wall to dissipate energy, and the dual energy dissipation effect is achieved; vibration control of any mode of the high-rise structure can be realized; besides, when vibration is small in amplitude and large in amplitude, elastic restoring force for tuning the vibration reduction cables can be provided by means of gravitational potential energy of the mass blocks and the tension and compression energy dissipation pieces between the adjacent mass blocks, and therefore the continuous vibration reduction effect can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of high-rise structure dampers, and in particular to a tuned cable damper used for multi-modal vibration control of high-rise structures. Background Art

[0002] The application of traditional tuned dampers (such as tuned mass dampers) in the vibration control of tall structures has certain application value, but there are also some inevitable disadvantages. The first is the cost issue. From the selection of materials to precise processing and debugging, each link is accompanied by high costs. For some large-scale tall structure projects, multiple dampers need to be installed, which greatly increases the total cost.

[0003] In some large-scale TV towers, wind turbine towers or solar thermal power station absorption tower projects, a single tuned damper can only control the first-order modal vibration, while earthquake and wind loads may cause multi-modal vibrations of tall structures (such as first-order modal vibrations, second-order modal vibrations and third-order modal vibrations, etc.). In order to achieve a better vibration reduction effect, dozens or even dozens of tuned dampers may need to be installed, which greatly increases the cost of construction and operation. Secondly, tuned dampers are very sensitive to the natural frequency of the structure. Since its working principle is mainly based on matching with the natural frequency of the structure to achieve the vibration reduction effect, once the natural frequency of the structure changes significantly, for example, due to long-term loads, structural damage or modification, the performance of the damper may be seriously affected. In this case, the damper needs to be re-adjusted or redesigned, which will not only bring additional costs and time, but may also affect the normal use of the structure. Furthermore, space requirements are also a limiting factor. Tuned dampers usually need to occupy a certain amount of internal space in the structure, which is a challenge for tall structures with tight space. During the design phase, it is necessary to fully consider the installation location and space requirements of the damper, which may have a certain impact on the layout and function of the structure. For example, in some tall structures with limited internal space, in order to install tuned dampers, it may be necessary to sacrifice a portion of the usable space, or redesign and adjust other parts of the structure to ensure that there is enough space to accommodate the damper. Although traditional tuned dampers perform well in dealing with some common vibration conditions, their shock absorption effect may not be ideal when faced with certain complex dynamic loads or extreme conditions, especially in extreme conditions such as strong earthquakes or wind disasters.

[0004] In summary, the traditional tuned mass damper has the problems of narrow vibration reduction band, large space occupation and inability to control multi-order modal vibration of the structure with a single device. The paper Hanging-chain impact dampers_a simple method for damping tall flexible structures,in_International Research Seminar-wind Effect on Building and Structures (Hanging-chain impact dampers_a simple method for damping tall flexible structures, in_International Research Seminar-wind Effect on Building and Structures) published: "This paper studies a simple concept for implementing damping to suppress wind-induced vibrations of a class of upright structures (such as antennas, chimneys and towers). The results show that chains covered with rubber sleeves and freely suspended to impact vertical channels can absorb a large amount of energy associated with the lateral oscillations of the channel." This chain damper can present different linear shapes with different responses to structural vibrations, and is suitable for the situation of arbitrary modal superposition of tall structures, solving the problem that a single traditional tuned mass damper cannot achieve multi-modal vibration control; secondly, the chain damper can design the working space of the chain according to actual needs, solving the spatial installation problem of traditional tuned mass dampers; the chain damper uses collision energy dissipation to solve the defects of viscous damping leakage and poor durability in traditional tuned mass dampers.

[0005] However, the above-mentioned chain damper, with rubber wrapped iron chain, causes the iron chain to swing through the vibration of the towering structure, thereby causing the iron chain to collide with the box wall and consume energy. When the amplitude is small and the chain cannot collide with the box wall, it cannot consume energy. Moreover, if only a chain is used, the elastic restoring force is insufficient. If it only relies on the mass of the chain itself, the mass is small and the vibration reduction effect is poor. The buckles of the iron chain will wear out. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the chain damper in the prior art that uses rubber to wrap an iron chain, causes the iron chain to swing through the vibration of the tall structure, and causes the iron chain to collide with the box wall to consume energy, and when the amplitude is small and the chain cannot collide with the box wall, it cannot consume energy, only uses a chain, the elastic restoring force is insufficient, and only relies on the chain's own mass, the tuning mass is small, and the vibration reduction effect is poor. A tuned rope damper for multi-modal vibration control of tall structures is provided.

[0007] In a first aspect, the present invention provides a tuned cable damper for multi-modal vibration control of a tall structure, comprising:

[0008] A rigid enclosure wall, wherein the rigid enclosure wall is used to be fixed on the top of the tall structure, and the axial direction of the rigid enclosure wall is vertical;

[0009] A tuned vibration-damping cable, the tuned vibration-damping cable comprising a cable structure and a plurality of mass blocks, the upper end of the cable structure being used to be fixed to the towering structure, the lower part of the cable structure being located in the inner space of the rigid enclosure wall, all the mass blocks being arranged at intervals along the length direction of the cable structure, the mass blocks being connected to the cable structure, tensile and compressive energy-absorbing parts being connected between adjacent mass blocks, and the mass blocks being located in the rigid enclosure wall;

[0010] A collision energy absorbing part is provided on at least one of the mass block and the inner side of the rigid enclosure wall.

[0011] The tuned cable damper for multi-modal vibration control of a tall structure of the present invention arranges a plurality of mass blocks on the cable structure at intervals along the length direction of the cable structure, so that the plurality of mass blocks can be suspended in the inner space of a rigid enclosure wall through the cable structure, and the upper end of the cable structure is connected to the top of the tall structure, and the rigid enclosure wall is fixed to the top of the tall structure. When the tall structure generates a vibration with a large amplitude, the cable structure shakes and deforms, so that the mass block can collide with the inner wall of the rigid enclosure wall, and at least one of the mass block and the inner side of the rigid enclosure wall is provided with the collision energy absorbing member, so that the collision between the mass block and the inner wall of the rigid enclosure wall can generate energy consumption, which is compared with the chain damper of the prior art. Type damper, the mass block can provide a larger physical mass, so that the tuned cable damper has a larger additional mass than the chain damper in the prior art, thereby making its vibration reduction effect better; moreover, when the amplitude is small, the mass block can compress and stretch the tensile and compressive energy absorbing parts between adjacent mass blocks to consume energy, and when the amplitude is large, the mass block and the rigid enclosure wall collide with the collision energy absorbing parts to consume energy, thereby achieving a double energy consumption effect; in addition, in both small and large amplitude vibrations, the gravitational potential energy of the mass block and the tensile and compressive energy absorbing parts between adjacent mass blocks can be relied on to provide the elastic restoring force of the tuned vibration reduction cable, thereby enabling it to achieve a continuous vibration reduction effect.

[0012] Preferably, the tensile and compressive energy absorbing member is an annular structure, and the tensile and compressive energy absorbing member is sleeved on the outside of the cable structure, so as to achieve balanced vibration reduction and energy consumption in the circumferential direction.

[0013] Preferably, the inner diameter of the tensile and compressive energy absorbing member is larger than the maximum dimension of the cross section of the cable structure, that is, the tensile and compressive energy absorbing member does not contact the cable structure, thus maximizing the energy consumption of the tensile and compressive energy absorbing material and reducing material waste.

[0014] Preferably, when the mass block is provided with the collision energy absorbing member, the collision energy absorbing member is arranged on the peripheral side of the mass block;

[0015] When the collision energy absorbing component is disposed on the inner side of the rigid enclosure wall, the collision energy absorbing component is laid on the inner surface of the rigid enclosure wall.

[0016] The above-mentioned arrangement of the collision energy absorbing parts can improve the collision energy absorbing effect.

[0017] Preferably, the collision energy absorbing parts are provided on the inner sides of the mass block and the rigid enclosure wall, so that the collision energy absorbing effect is better and the service life can be increased.

[0018] Preferably, it also includes a bottom plate, which is arranged at the bottom of the rigid enclosure wall, and the bottom plate and the rigid enclosure wall form a rigid tube.

[0019] Setting up a base plate can prevent the tuned vibration-damping cables from falling and damaging the equipment and line pipes inside the tall structure.

[0020] Preferably, it further comprises a plurality of first connecting members, all of which are distributed circumferentially and vertically at intervals along the outer side of the rigid enclosing wall, and the first connecting members are used to connect the rigid enclosing wall and the towering structure;

[0021] and / or,

[0022] It also includes a second connecting member, which is a cross structure. The cross structure is used to be horizontally connected to the towering structure. The upper end of the cable structure is connected to the center of the cross structure. The cross structure is higher than the top of the rigid enclosure wall.

[0023] The first connector is distributed at intervals in the circumferential and vertical directions on the outside of the rigid enclosure wall, which can ensure stable connection with the towering structure in the circumferential and vertical directions to ensure stability when it is hit. The second connector uses a cross to suspend the cable structure at the center of the cross section of the rigid enclosure wall, ensuring that the initial position in all directions is the same, so that the collision energy can be stably dissipated in all directions; and the second connector does not contact the rigid enclosure wall, which is convenient for replacing collision energy dissipation parts and tension and compression energy dissipation parts, and is convenient for disassembly and construction.

[0024] Preferably, in the initial state, the vertical spacing between the lower end of the cable structure and the lower end of the rigid enclosure wall is αL0ΔT, wherein α and L0 represent the linear expansion coefficient and the initial length of the cable structure respectively, and ΔT represents the change in ambient temperature, so as to avoid vibration reduction failure or structural damage caused by cable elongation due to temperature change, and also reduce the vertical height of the rigid enclosure wall itself, save costs, and facilitate installation;

[0025] And / or, the mass block at the bottom is connected to the lower end of the cable structure, which can maximize the use of the cable structure, reduce the vertical height of the rigid enclosure wall itself, save costs, and facilitate installation;

[0026] And / or, all the mass blocks are evenly arranged along the length direction of the cable structure to ensure that the tuned vibration-damping cable can achieve any order vibration mode in a balanced manner.

[0027] Preferably, the cable structure is a steel wire rope, a steel chain or a hemp rope;

[0028] And / or, the tensile and compressive energy absorbing parts are made of rubber material, ACF material or EVA material;

[0029] And / or, the collision energy absorbing component is made of rubber material, ACF material or EVA material.

[0030] Preferably, the mass block is a circular pancake-shaped structure, the rigid enclosure wall is an annular structure, and the upper end of the cable structure is arranged corresponding to the horizontal center of the rigid enclosure wall.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a tuned cable damper for multi-modal vibration control of a tall structure. A plurality of mass blocks are arranged on a cable structure at intervals along the length direction of the cable structure, so that the plurality of mass blocks can be suspended in the inner space of a rigid enclosure wall through the cable structure, and the upper end of the cable structure is connected to the top of the tall structure, and the rigid enclosure wall is fixed to the top of the tall structure. When the tall structure generates a vibration with a large amplitude, the cable structure shakes and deforms, so that the mass block can collide with the inner wall of the rigid enclosure wall, and at least one of the mass block and the inner side of the rigid enclosure wall is provided with the collision energy absorbing member, so that the collision between the mass block and the inner wall of the rigid enclosure wall can generate energy consumption, and the mass block can generate energy consumption. The mass block can provide a larger physical mass, so that the tuned cable damper has a larger additional mass than the chain damper in the prior art, thereby making its vibration reduction effect better; moreover, when the amplitude is small, the mass block can compress and stretch the tensile and compressive energy absorbing parts between adjacent mass blocks to consume energy, and when the amplitude is large, the mass block and the rigid enclosure wall collide with the collision energy absorbing parts to consume energy, thereby achieving a double energy consumption effect; in addition, in both small and large amplitude vibrations, the gravitational potential energy of the mass block and the tensile and compressive energy absorbing parts between adjacent mass blocks can be relied on to provide the elastic restoring force of the tuned vibration reduction cable, thereby achieving a continuous vibration reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the tuned cable damper for multi-modal vibration control of high-rise structures according to the present invention;

[0034] Figure 2 is a plan view of a second connecting member;

[0035] Figure 3 It is a horizontal section schematic diagram of the tuned cable damper for multi-modal vibration control of a tall structure according to the present invention;

[0036] Figure 4 Schematic diagram of the structural deformation of the tuned vibration-damping cable;

[0037] Figure 5 A schematic diagram of the tuned cable damper for multi-modal vibration control of a tall structure according to the present invention being installed on the top of the tall structure;

[0038] Figure 6 It is a horizontal section schematic diagram of the tuned cable damper for multi-modal vibration control of a tall structure according to the present invention installed on the top of the tall structure;

[0039] Figure 7 It is a schematic diagram of the first-order vibration energy consumption when no collision energy consumption occurs;

[0040] Figure 8 It is a schematic diagram of the second-order vibration energy dissipation when no collision energy dissipation occurs;

[0041] Fig. 9 This is a schematic diagram of the third-order vibration energy dissipation when no collision energy dissipation occurs;

[0042] Fig.10 It is a schematic diagram of multi-order vibration energy consumption when no collision energy consumption occurs;

[0043] Fig.11 It is a schematic diagram of the first-order vibration energy dissipation when collision energy dissipation occurs;

[0044] Fig.12 It is a schematic diagram of the second-order vibration energy dissipation when collision energy dissipation occurs;

[0045] Fig.13 It is a schematic diagram of the third-order vibration energy dissipation when collision energy dissipation occurs;

[0046] Fig.14 It is a schematic diagram of multi-order vibration energy dissipation when collision energy dissipation occurs;

[0047] Fig.15 The present invention is a schematic diagram of a discretized model in which the tuned cable damper for multi-modal vibration control of a tall structure is attached to a single degree of freedom system.

[0048] Markings in the figure: 1. tall structure; 2. rigid tube; 21. rigid enclosure wall; 22. bottom plate; 3. tuned vibration-damping cable; 31. cable structure; 311. fixed end; 32. mass block; 33. tension and compression energy absorbing part; 41. first collision energy absorbing part; 42. second collision energy absorbing part; 51. first connecting part; 52. second connecting part; 6. ground. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0050] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0051] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0052] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0053] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0054] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0055] Example 1

[0056] like Figure 1-Figure 6 As shown, a tuned cable damper for multi-modal vibration control of a high-rise structure includes: a rigid enclosure wall 21, a tuned vibration-absorbing cable 3 and a collision energy-absorbing member.

[0057] The rigid enclosure wall 21 is used to be fixed on the top of the tall structure 1, and the axial direction of the rigid enclosure wall 21 is vertical; Figure 5 As shown, the rigid enclosure wall 21 and the towering structure 1 are preferably connected and fixed by a plurality of first connecting members 51, all of which are distributed circumferentially and vertically at intervals along the outer side of the rigid enclosure wall 21. The first connecting members 51 are distributed circumferentially and vertically at intervals along the outer side of the rigid enclosure wall 21, which can ensure a stable connection with the towering structure 1 in the circumferential and vertical directions, so as to ensure stability when being collided. Figure 3 As shown, the first connecting members 51 are arranged in a row every 90° in the circumferential direction on the outer side of the rigid enclosure wall 21. Figure 1 As shown, a plurality of first connecting members 51 are arranged at intervals in each vertical column outside the rigid enclosure wall 21. The first connecting member 51 can be a metal rod, which is fixed to the top inner wall of the towering structure 1 by welding or the like. In addition to the connection method using a plurality of first connecting members 51, fixing the rigid enclosure wall 21 to the top of the towering structure 1 by other methods can also meet the needs. The rigid enclosure wall 21 is connected to the controlled structure (towering structure 1) through the connecting member, and ensures that when the controlled structure vibrates, no relative deformation occurs between the rigid enclosure wall 21 and the towering structure 1.

[0058] like Figure 4 As shown, the tuned vibration reduction cable 3 includes a cable structure 31 and a plurality of mass blocks 32. The upper end of the cable structure 31 is used to be fixed to the towering structure 1. Preferably, as shown in FIG. Figure 2 and Figure 5 As shown, the upper end of the cable structure 31 is fixed to the towering structure 1 by a second connecting member 52, and the second connecting member 52 is a cross structure, and the cross structure is used to be horizontally connected to the towering structure 1, and the upper end of the cable structure 31 is connected to the center of the cross structure. The second connecting member 52 uses a cross to suspend the cable structure 31 at the cross-sectional center of the rigid enclosure wall 21, ensuring that the initial position in all directions is the same, so that the collision energy can be stably absorbed in all directions; the cross structure is higher than the top of the rigid enclosure wall 21, so that the second connecting member 52 does not contact the rigid enclosure wall 21. Compared with directly using a rigid enclosure wall 21 with a top cover, it is easier to replace the collision energy absorbing parts and the tension and compression energy absorbing parts 33, and it is convenient for disassembly and construction.

[0059] like Figure 1 and Figure 4As shown, the lower part of the cable structure 31 is located in the internal space of the rigid enclosure wall 21, all the mass blocks 32 are arranged at intervals along the length direction of the cable structure 31, the mass blocks 32 are connected to the cable structure 31, and the mass blocks 32 are located in the rigid enclosure wall 21; that is, by arranging a plurality of mass blocks 32 at intervals along the length direction of the cable structure 31 on the cable structure 31, the plurality of mass blocks 32 can be suspended in the internal space of the rigid enclosure wall 21 through the cable structure 31, and the upper end of the cable structure 31 is connected to the top of the towering structure 1, and the rigid enclosure wall 21 is fixed to the top of the towering structure 1. When the towering structure 1 generates a vibration with a large amplitude, the cable structure 31 shakes and deforms, so that the mass blocks 32 can hit the inner wall of the rigid enclosure wall 21;

[0060] At least one of the mass block 32 and the inner side of the rigid enclosure wall 21 is provided with the collision energy absorbing member, that is, the mass block 32 is provided with the collision energy absorbing member, and the inner side of the rigid enclosure wall 21 is not provided with the collision energy absorbing member; or the mass block 32 is not provided with the collision energy absorbing member, and the inner side of the rigid enclosure wall 21 is provided with the collision energy absorbing member; or the mass block 32 and the inner side of the rigid enclosure wall 21 are both provided with the collision energy absorbing member; Figure 11-Figure 14 As shown, the collision between the mass block 32 and the inner wall of the rigid enclosure wall 21 can generate energy consumption. Compared with the chain damper in the prior art, the mass block 32 can provide a larger physical mass, so that the tuned cable damper has a larger additional mass than the chain damper in the prior art, thereby achieving a better vibration reduction effect.

[0061] Moreover, the tensile and compressive energy absorbing parts 33 are connected between the adjacent mass blocks 32. When the amplitude is small, the tensile and compressive energy absorbing parts 33 between the adjacent mass blocks 32 can be compressed and stretched by the mass blocks 32 to generate energy consumption. Figure 7-10 As shown; when the amplitude is large, the collision energy absorbing parts are used to dissipate energy through the collision between the mass block 32 and the rigid enclosure wall 21, thereby achieving a double energy dissipation effect; in addition, when the amplitude is small or large, the gravitational potential energy of the mass block 32 and the tension and compression energy absorbing parts 33 between the adjacent mass blocks 32 can provide the elastic restoring force of the tuned vibration reduction cable 3, thereby enabling it to achieve a continuous vibration reduction effect.

[0062] As a preferred embodiment, the collision energy absorbing parts are provided on the inner sides of the mass block 32 and the rigid enclosure wall 21, such as Figure 1 and Fig.14 As shown, a first collision energy absorbing member 41 is provided inside the rigid enclosure wall 21, and a second collision energy absorbing member 42 is provided outside the periphery of the mass block 32. The first collision energy absorbing member 41 is connected to the inner side of the rigid enclosure wall 21 by bonding or bolts, and the second collision energy absorbing member 42 is bonded to the periphery of the mass block 32 to wrap the mass block 32. Fig.14It is shown in the figure that when the mass block 32 collides with the inner side of the rigid enclosure wall 21, the second collision energy absorbing member 42 on the outer side of the mass block 32 collides with the first collision energy absorbing member 41 on the inner side of the rigid enclosure wall 21, so that the collision energy absorbing effect is better and the service life can be increased. When the mass block 32 is provided with the collision energy absorbing member, the collision energy absorbing member is arranged on the circumference of the mass block 32 about the circumference of the cable structure 31; when the collision energy absorbing member is arranged on the inner side of the rigid enclosure wall 21, the collision energy absorbing member is laid on the inner surface of the rigid enclosure wall 21. The above-mentioned arrangement of the collision energy absorbing member can improve the collision energy absorbing effect.

[0063] In this embodiment, the tensile and compressive energy dissipation member 33 is connected between two adjacent mass blocks 32, and can generate tensile and compressive energy dissipation when the two adjacent mass blocks 32 rotate relative to each other. As a preferred embodiment, the tensile and compressive energy dissipation member 33 is an annular structure, and the tensile and compressive energy dissipation member 33 is sleeved on the outside of the cable structure 31, so as to achieve balanced vibration reduction and energy dissipation in the circumferential direction. Furthermore, the inner diameter of the tensile and compressive energy dissipation member 33 is larger than the maximum size of the cross section of the cable structure 31, such as Figure 4 As shown, the tensile and compressive energy absorbing parts 33 are not in contact with the cable structure 31, so the energy consumption of the tensile and compressive energy absorbing materials is maximized and material waste is reduced.

[0064] exist Fig.15 The single degree of freedom system in the lower part is represented by Figure 5 The towering structure 1 in the figure, where m1, k1 and c1 represent the first-order modal mass, first-order bending stiffness and first-order damping coefficient of the towering structure 1 respectively. The multiple series subsystems in the upper part are tuned cable dampers, m bn , k bn and c bn Respectively represent the mass, stiffness and damping coefficient of the nth subsystem, wherein the mass is provided by the circular mass block 32, the stiffness is provided by the gravitational potential energy of the circular mass block 32, the cable structure 31 and the stiffness of the tension and compression energy dissipation parts 33, the damping is provided by the tension and compression energy dissipation parts 33, and the partitions on both sides of the mass block 32 represent the rigid enclosure wall 21. This figure is used to show the stress conditions of the coupled tuned cable damper for the towering structure. When the amplitude is small, it can be regarded as multiple series tuned mass dampers, and when the amplitude is large, it can be regarded as multiple series double-sided collision tuned mass dampers.

[0065] As a preferred embodiment, the tuned cable damper for multi-modal vibration control of a tall structure further includes a base plate 22, such as Figure 1 As shown, the bottom plate 22 is arranged at the bottom of the rigid enclosure wall 21, and the bottom plate 22 and the rigid enclosure wall 21 form a rigid tube 2. The bottom plate 22 can prevent the tuning vibration reduction cable 3 from falling and damaging the equipment and line pipelines inside the tall structure 1.

[0066] As a preferred implementation, Figure 1 As shown, the vertical spacing between the lower end of the cable structure 31 and the lower end of the rigid enclosure wall 21 is αL0ΔT, wherein α and L0 represent the linear expansion coefficient and initial length of the cable structure 31 respectively, and ΔT represents the change in ambient temperature. This avoids vibration reduction failure or structural damage caused by cable elongation due to temperature changes, and also reduces the vertical height of the rigid enclosure wall 21 itself, saving costs and facilitating installation.

[0067] As a preferred implementation, Figure 1 As shown, the lowest mass block 32 is connected to the lower end of the cable structure 31, which can maximize the use of the cable structure 31, reduce the vertical height of the rigid enclosure wall 21 itself, save costs, and facilitate installation.

[0068] As a preferred implementation, Figure 1 As shown, all the mass blocks 32 are evenly arranged along the length direction of the cable structure 31 to ensure that the tuned vibration-damping cable 3 can achieve any order vibration mode in a balanced manner.

[0069] As a preferred embodiment, the cable structure 31 is a steel wire rope, a steel chain or a hemp rope, etc., all of which are required to be able to bend and deform but not easily shear. Among them, the strength of the hemp rope needs to meet the impact energy consumption requirements; the buckle of the steel chain will produce wear, while there is no wear effect when the steel wire rope is used, and it has high strength and durability. And the mass block 32 can be made of steel components. Compared with the connection between the hemp rope and the steel chain and the mass block 32, the steel wire rope and the mass block 32 can be welded, which is more convenient. The cable structure 31 has the characteristic of swinging in any direction. When a steel chain is used, the steel chain adopts a buckle type or multiple universal ball joints; the number of steel chain buckles or universal ball joints should not be too few, and the length of the steel chain should not be too short to ensure that the steel chain should have enough vibration modes. When the steel chain is a buckle chain, it should have sufficient strength and durability to prevent the buckle from being worn due to long-term vibration; when the steel chain uses multiple spherical hinges in series, each spherical hinge should have sufficient smoothness and provide a certain viscous damping effect, and the strength of the spherical hinge should meet the design requirements to prevent the sphere from detaching from the spherical shell. When the cable structure 31 uses a steel wire rope, it has a certain flexibility, and the steel wire rope can present a variety of vibration modes in the working state.

[0070] In this embodiment, the collision energy absorbing part adopts collision energy absorbing material, and the tension and compression energy absorbing part 33 adopts tension and compression energy absorbing material. Both the collision energy absorbing material and the tension and compression energy absorbing material should have the energy absorbing effect of elastic-plastic characteristics; the ring width of the tension and compression energy absorbing material should be moderate, so as to ensure sufficient energy absorbing effect and suitable tuning and recovery effect. The collision energy absorbing material and the tension and compression energy absorbing material should have sufficient buffering energy absorption characteristics; the collision energy absorbing material should be tightly attached to the outer side of the mass block 32 and the inner side of the rigid enclosure wall 21.

[0071] As a preferred implementation, the tensile and compressive energy absorbing member 33 is made of rubber material, ACF material or EVA material.

[0072] As a preferred implementation, the collision energy absorbing member is made of rubber material, ACF material or EVA material.

[0073] Among them, ACF material (Artificial Cartilage Foam) is a bionic energy-absorbing material, and EVA material is a material copolymerized by ethylene and vinyl acetate, and its chemical name is ethylene-vinyl acetate copolymer (EthyleneVinyl Acetate Copolymer), referred to as EVA.

[0074] As a preferred implementation, Figure 3 As shown, the mass block 32 is a circular pancake structure, the rigid enclosure wall 21 is an annular structure, and the upper end of the cable structure 31 is arranged at the horizontal center of the rigid enclosure wall 21, so that the initial position of the tuning vibration reduction cable 3 is located at the center of the circle, which can ensure that the collision energy dissipation effect in any horizontal direction of the circumference is the same, that is, it is conducive to ensuring the balance of energy dissipation capacity in all directions. In special cases, such as installation space limitations and other issues, the rigid enclosure wall 21 can also be square or polygonal. The rigid enclosure wall 21 should have sufficient strength and small mass. When the cable structure 31 undergoes large-amplitude deformation and collides with the collision energy dissipation material, the rigid enclosure wall 21 should not be deformed.

[0075] The tuned cable damper used for multi-modal vibration control of high-rise structures described in this embodiment has a multi-modal vibration control effect. When the controlled structure (high-rise structure 1) is excited to superimpose multiple modal vibrations and presents multi-frequency vibrations under the action of external loads, this vibration will be transmitted to the tuned cable damper and stimulate the multi-modal vibration tuning effect of the tuned cable damper. The tuned cable damper performs elastic-plastic tension and compression energy consumption or collision energy consumption, thereby reducing the vibration response of the controlled structure. The tuned cable damper itself has multiple modes. The vibrations of the high-rise structure 1 of different frequencies will also stimulate different tuning frequencies of the tuned cable damper, and can adaptively tune and consume energy according to the response of the high-rise structure 1. It has the advantage of a wide vibration reduction frequency band, overcoming the defect that the traditional tuned mass damper can only achieve good control effect at a single frequency. It also has the advantages of small installation space and low cost. When the installation space is limited, the rigid enclosure wall 21 can be reduced. At this time, when the external load is large, the tuned cable damper mainly dissipates energy through collision to achieve the purpose of reducing the structural response, overcoming the defect of insufficient energy consumption when the traditional tuned mass damper is limited in stroke. The tuned cable damper can achieve multi-modal vibration and broadband excitation with a single one, and has a control effect similar to that of multiple traditional tuned mass dampers, reducing the disadvantage of a sharp increase in cost due to too many installations. And it has strong durability. The tuned cable damper uses cable structure 31 tuning, elastic-plastic material tension and compression and collision energy dissipation. Its energy dissipation path is more diverse than that of traditional tuned mass dampers, avoiding the disadvantage of overall failure of the damper due to failure of a single energy dissipation; in addition, the elastic-plastic material tension and compression and collision durability are more durable, avoiding the phenomenon of oil leakage or buckling and jamming of traditional viscous dampers, and improving the operating cost of the entire life cycle.

[0076] In summary, in this embodiment, the cable structure 31 is a flexible cable, the mass block 32 is a circular discus, the circular discus are connected in series by a flexible cable, and a tensile and compressive energy absorbing part 33 is installed between the interlayers of the circular discus, the side of the discus wraps the first collision energy absorbing part 41, and the second collision energy absorbing part 42 is installed inside the cylinder wall of the rigid cylinder 2. When the amplitude is small, the tensile and compressive energy absorbing part 33 between the circular discus is compressed and stretched by the circular discus to consume energy. When the amplitude is large, the circular discus can further collide with the cylinder wall energy absorbing material to consume energy, which has a double energy consumption effect. And the tensile and compressive energy absorbing material is installed between the circular discus, which can not only provide energy consumption, but also provide the elastic restoring force of the flexible cable. Installing multiple circular discus on the flexible cable can provide a larger physical mass. The larger the additional mass of the tuned shock absorber, the better the vibration reduction effect. When the flexible cable adopts a steel wire rope, there is no wear effect and the durability is strong. And it overcomes the shortcomings of the traditional tuned mass damper, such as narrow vibration reduction frequency band, large space occupation, inability to use a single device to control the multi-modal vibration of the structure, and poor durability. That is, the tuned cable damper can present different linear shapes with different vibration responses of the tall structure 1, which is suitable for the situation of arbitrary mode superposition of the tall structure 1, and solves the problem that a single traditional tuned mass damper cannot achieve multi-modal vibration control; secondly, the tuned cable damper can design the working space of the tuned vibration reduction cable 3 according to actual needs, solving the spatial installation problem of the traditional tuned mass damper; the tuned cable damper adopts tension and compression energy dissipation and collision energy dissipation, solving the defects of viscous damping leakage and poor durability in the traditional tuned mass damper. The present invention can be used for wind-induced vibration and seismic response control of tall structures 1 such as high-rise building structures, chimneys, wind turbine towers, and solar thermal power station absorption towers.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tuned cable damper for multi-modal vibration control of tall structures, characterized in that: include: A rigid enclosure wall (21), the rigid enclosure wall (21) being used to be fixed on the top of the tall structure (1), and the axial direction of the rigid enclosure wall (21) being vertical; A tuned vibration-damping cable (3), the tuned vibration-damping cable (3) comprising a cable structure (31) and a plurality of mass blocks (32), the upper end of the cable structure (31) being used to be fixed to the towering structure (1), the lower part of the cable structure (31) being located in the internal space of the rigid enclosure wall (21), all the mass blocks (32) being arranged at intervals along the length direction of the cable structure (31), the mass blocks (32) being connected to the cable structure (31), tensile and compressive energy-absorbing parts (33) being connected between adjacent mass blocks (32), and the mass blocks (32) being located in the rigid enclosure wall (21); A collision energy absorbing component, wherein at least one of the mass block (32) and the inner side of the rigid enclosure wall (21) is provided with the collision energy absorbing component.

2. A tuned cable damper for multi-modal vibration control of a tall structure according to claim 1, characterized in that: The tensile and compressive energy absorbing member (33) is an annular structure, and the tensile and compressive energy absorbing member (33) is sleeved on the outside of the cable structure (31).

3. The tuned cable damper for multi-modal vibration control of tall structures according to claim 2, characterized in that: The inner diameter of the tensile and compressive energy absorbing member (33) is greater than the maximum dimension of the cross section of the cable structure (31).

4. The tuned cable damper for multi-modal vibration control of tall structures according to claim 1, characterized in that: When the mass block (32) is provided with the collision energy absorbing component, the collision energy absorbing component is arranged on the peripheral side of the mass block (32); When the collision energy absorbing component is provided on the inner side of the rigid enclosure wall (21), the collision energy absorbing component is laid on the inner surface of the rigid enclosure wall (21).

5. The tuned cable damper for multi-modal vibration control of tall structures according to claim 4, characterized in that: The collision energy absorbing part is provided on the inner side of the mass block (32) and the rigid enclosure wall (21).

6. The tuned cable damper for multi-modal vibration control of tall structures according to claim 1, characterized in that: It also comprises a bottom plate (22), wherein the bottom plate (22) is arranged at the bottom of the rigid enclosing wall (21), and the bottom plate (22) and the rigid enclosing wall (21) form a rigid tube (2).

7. The tuned cable damper for multi-modal vibration control of tall structures according to claim 1, characterized in that: It also includes a plurality of first connecting members (51), all of which are distributed circumferentially and vertically at intervals along the outer side of the rigid enclosing wall (21), and the first connecting members (51) are used to connect the rigid enclosing wall (21) and the towering structure (1); and / or, It also includes a second connecting member (52), which is a cross structure. The cross structure is used to be horizontally connected to the towering structure (1). The upper end of the cable structure (31) is connected to the center of the cross structure. The cross structure is higher than the top of the rigid enclosure wall (21).

8. A tuned cable damper for multi-modal vibration control of a tall structure according to any one of claims 1 to 7, characterized in that: In the initial state, the vertical distance between the lower end of the cable structure (31) and the lower end of the rigid enclosure wall (21) is αL0ΔT, wherein α and L0 represent the linear expansion coefficient and initial length of the cable structure (31) respectively, and ΔT represents the change in ambient temperature; and / or, the lowermost mass block (32) is connected to the lower end of the cable structure (31); And / or, all the mass blocks (32) are evenly arranged along the length direction of the cable structure (31).

9. A tuned cable damper for multi-modal vibration control of a tall structure according to any one of claims 1 to 7, characterized in that: The cable structure (31) is a steel wire rope, a steel chain or a hemp rope; And / or, the tensile and compressive energy absorbing member (33) is made of rubber material, ACF material or EVA material; And / or, the collision energy absorbing component is made of rubber material, ACF material or EVA material.

10. A tuned cable damper for multi-modal vibration control of a tall structure according to any one of claims 1 to 7, characterized in that: The mass block (32) is a circular pancake-shaped structure, the rigid enclosure wall (21) is an annular structure, and the upper end of the cable structure (31) is arranged corresponding to the horizontal center of the rigid enclosure wall (21).

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