Bidirectional passive tuned mass damper and tuning method

Abstract

The invention relates to the technical field of vibration control of building structures, in particular to a bidirectional passive tuned mass damper and a tuning method. The bidirectional passive tuned mass damper comprises a chassis, a mass sphere, a support, a restraining device, a connecting device and a force transmission assembly; the mass ball body is arranged on the chassis in a rolling manner; the restraining device is of a hemispherical frame structure and horizontally sleeves the upper portion of the mass sphere. The supports are oppositely arranged on the outer edge of the base plate in the first direction and the second direction respectively, and the first direction is perpendicular to the second direction. Each support is provided with a force transmission assembly, the connecting device is of a telescopic structure, and the connecting device is connected with the restraining device and the force transmission assemblies so as to attenuate displacement generated when the mass ball vibrates along with the building structure. The single mass ball is placed on the base plate with the groove to replace an existing swing type TMD device for lifting a single ball, the vertical building space is saved, and the space utilization rate is increased. And meanwhile, the'detuning 'of a traditional rolling type TMD device can be remarkably improved, and the bidirectional vibration reduction effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of building structure vibration control, and in particular to a bidirectional passive tuned mass damper and a tuning method. Background Art

[0002] At present, the passive tuned mass damper (TMD) is one of the main vibration reduction methods for high-rise building structures to control wind-induced vibration. TMD has the advantages of simple structure and no need for external energy input. It has been applied in actual projects such as Taipei 101 and Shanghai Tower in Taiwan, and its effectiveness has been verified under harsh environmental factors such as typhoons.

[0003] The existing TMD device is mainly a pendulum TMD. The mass component of the pendulum TMD is suspended by ropes, and its natural vibration period is positively correlated with the rope length. The natural vibration frequency of high-rise buildings is often low in the first order frequency and long in period, which leads to the need for a longer pendulum length for the traditional pendulum TMD, which usually occupies a larger vertical space inside the building, affecting the building utilization rate. The rolling TMD has more advantages in saving building space, construction and installation. When the natural vibration period of the TMD device is close to the natural vibration period of the building structure, it can achieve a good vibration reduction effect. However, the existing rolling TMD usually adopts multiple small mass spheres with a diameter of less than 0.2 m to be placed in a dispersed manner, and there is no large-scale centralized structure with a diameter of more than 1 m for each sphere. The rolling TMD based on small mass spheres has too small a total mass when placed in a centralized manner, and it is difficult to meet the use requirements of controlling the wind-induced vibration of high-rise buildings.

[0004] Due to the adjustment of the use function of local space or the aging of structural components during the entire life cycle of the building structure, the natural vibration period of the building structure changes with the actual use of the building. The natural vibration period of the existing rolling TMD device is determined by the orbit radius and the sphere radius. Its natural vibration period is fixed and difficult to match with the building structure after the natural vibration period changes, which easily leads to the "detuning" of the TMD device, that is, the natural vibration period of the TMD device differs greatly from the natural vibration period of the building structure, which makes the vibration reduction effect worse.

[0005] In addition, for conventional building structures, the first two modes of the structure are usually translational motions, and the translational directions are usually perpendicular to each other. The first-order mode has a longer period than the second-order mode, which means that the cross-sectional stiffness of the building is small when it is bent in the first-order mode, so the axis that bends and deforms around this axis is called the weak axis; correspondingly, the cross-sectional stiffness is large when it is bent in the second-order mode, so the axis that bends and deforms around this axis is called the strong axis. Currently, most of the existing TMD devices are designed for vibration reduction of the first-order mode of the building structure, that is, one-way vibration reduction control is adopted for the deformation mode of the structure bending and deforming around the weak axis, and the vibration reduction performance of a single mass sphere to achieve two-way control in the corresponding single concave surface has not been fully explored.

[0006] Therefore, there is an urgent need for a bidirectional passive tuned mass damper that can significantly improve the "detuning" of the traditional rolling TMD device and achieve a bidirectional vibration reduction effect. At the same time, compared with the pendulum TMD, it can reduce the vertical space occupied by the building and can well meet the vibration reduction needs of high-rise buildings. Summary of the invention

[0007] 1. Technical issues to be resolved In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a bidirectional passive tuned mass damper and a tuning method, which solve the technical problems that the existing TMD device is prone to "detuning", occupies a large vertical space of the building, and is difficult to achieve a bidirectional vibration reduction effect.

[0008] (II) Technical solution In order to achieve the above object, the main technical solutions adopted by the present invention include: A bidirectional passive tuned mass damper comprises: a chassis, a mass sphere, a support, a restraining device, a connecting device and a force transmission component; The mass sphere can be placed on the chassis in a rolling manner; The restraint device is a hemispherical frame structure, which is horizontally sleeved on the upper part of the mass sphere; The support is disposed relatively to the outer edge of the chassis along a first direction and a second direction respectively, and the first direction is perpendicular to the second direction; A force transmission component is arranged on each of the supports, and the connecting device is a retractable structure. The connecting device connects the restraining device and the force transmission component to attenuate the displacement of the mass sphere caused by the vibration of the building structure.

[0009] The support comprises a pair of fixing seats fixed on the building structure, and a sliding rod fixedly connected between the fixing seats, and the connecting device is slidably connected to the sliding rod.

[0010] The force transmission assembly includes an elastic member and a sliding device for connecting the elastic member to the sliding rod, and the elastic member and the sliding device are detachably connected.

[0011] The sliding device comprises sliding connection seats arranged in pairs and a connecting rod penetrating between the sliding connection seats, the sliding connection seats are slidably connected to the sliding rod, and the connecting rod is fixedly connected to the sliding connection seats by bolts.

[0012] The end of the connecting device connected to the sliding rod is located between the two sliding connecting seats, and the connecting device can push the sliding connecting seat to slide along the sliding rod.

[0013] It also includes position limiting bases arranged in pairs, the bottoms of the position limiting bases being fixedly connected to the building structure; The limiting base has a through slot through which the sliding connection seat can pass, the through slot is located below the sliding rod, and the communication direction of the through slot is consistent with the extension direction of the sliding rod.

[0014] The elastic member is sleeved on the connecting rod, and limit plates are provided at both ends of the elastic member, and the limit plates abut against the sliding connection seat; The width of the limiting plate is greater than the through slot of the limiting base, so that a limiting area for the elastic member is formed between the two limiting plates.

[0015] It also includes a damping member, one end of which is connected to the inner side wall of the fixing seat, and the other end of which is connected to the sliding connection seat. The telescopic direction of the damping member is the same as the sliding direction of the sliding connection seat.

[0016] A tuning method for a bidirectional passive tuned mass damper is applied to the bidirectional passive tuned mass damper and comprises the following steps: Step 1: Identify the two translation cycles of the building structure; Step 2: Calculate the first direction of the bidirectional passive tuned mass damper T 1 and second direction T The natural oscillation period of 2 is calculated as follows: in, T 1 is the natural oscillation period in the first direction, T 2 is the natural oscillation period in the second direction, m is the total mass of the mass sphere, g is the acceleration due to gravity, R is the radius of curvature of the track, r is the radius of the mass sphere, k 1 is the elastic recovery stiffness of the elastic member in the first direction, k 2 is the elastic recovery stiffness of the elastic member in the second direction; Step 3: judging whether the natural vibration period of the bidirectional passive tuned mass damper matches the translation period of the building structure according to the calculation result of step 2, if they match, the tuning is finished; If it does not match, adjust R , r , k 1. k 2, and repeat step 2 until the natural vibration period of the bidirectional passive tuned mass damper matches the two translation periods of the building structure.

[0017] Step 4: Adjust according to step 3 R , r , k 1. k 2, and replace the mass sphere and elastic member matching the parameters of the bidirectional passive tuned mass damper, and the tuning is completed.

[0018] (III) Beneficial effects The beneficial effects of the present invention are as follows: the present invention provides a bidirectional passive tuned mass damper, which places a single mass sphere on a chassis with a groove, replacing the existing pendulum-type TMD device that suspends a single sphere, saving vertical building space and improving space utilization. At the same time, it can significantly improve the "detuning" of the traditional rolling TMD device and achieve a bidirectional vibration reduction effect.

[0019] By setting a constraint device to constrain the mass sphere, the movement of the mass sphere can be constrained. In the process of the mass sphere rolling and pushing the constraint device, the connecting device eliminates the vertical displacement of the mass sphere, so that the horizontal displacement of the slider is consistent with the horizontal displacement of the mass sphere.

[0020] By setting a bidirectional support as a force transmission structure, the displacement generated by the mass sphere can be transmitted to the force transmission component on the support, and then the damping force provided by the force transmission component is transmitted to the building structure.

[0021] By setting the sliding connection seat as a force transmission carrier, the mass sphere can be subjected to the force of the spring and the damping member during the rolling process. By setting a detachable connecting rod in the second through hole at the bottom of the sliding connection seat, the bidirectional passive tuned mass damper can change the spring stiffness by replacing the elastic member according to the use change of the building structure, so as to realize the bidirectional tuning of the passive tuned mass damper and make the vibration reduction effect more prominent and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of a bidirectional passive tuned mass damper of the present invention; Figure 2 A three-dimensional diagram of the support of the present invention; Figure 3 is a three-dimensional diagram of the chassis of the present invention; Figure 4 It is a partial stereoscopic diagram of the elastic member and the sliding connection seat of the present invention; Figure 5 A three-dimensional diagram of the elastic member and the sliding connection seat of the present invention; Figure 6 A three-dimensional diagram of the sliding connection seat of the present invention; Figure 7 is a three-dimensional diagram of the damping member of the present invention; Figure 8 is a three-dimensional diagram of the connection device of the present invention; Fig. 9 is a perspective view of the restraint device of the present invention; Fig.10 A three-dimensional diagram of the support, the force transmission assembly and the connecting device of the present invention; Fig.11 A perspective view of the chassis, mass sphere and restraint device of the present invention; Fig.12 The comparison of the controlled and uncontrolled acceleration time history curves of the top floor of a 70-story shear wall structure under 50-year return period fluctuating wind load; Fig.13 Comparison of top-floor acceleration time history curves of a 70-story shear wall structure controlled by a bidirectional passive tuned mass damper and a traditional pendulum TMD under 50-year return period fluctuating wind loads.

[0023] [Description of Reference Numerals] 1: mass sphere; 2: support; 21: slide bar; 22: fixed seat; 3: chassis; 31: groove; 32: limiting side plate; 4: elastic member; 41: connecting rod; 42: limiting plate; 421: third through hole; 5: damping element; 51: cylinder; 52: piston; 53: hinged seat; 6: sliding connection seat; 61: first through hole; 62: second through hole; 7: connecting device; 71: connecting tube; 72: telescopic rod; 8: restraint device; 81: annular frame; 82: arc frame; 9: Limit base. DETAILED DESCRIPTION

[0024] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0025] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0026] See attached Figure 1 As shown, the present invention provides a bidirectional passive tuned mass damper, comprising: a chassis 3, a mass sphere 1, a support 2, a constraint device 8, a connecting device 7 and a force transmission component. The mass sphere 1 is rollingly arranged in a groove 31 at the top of the chassis 3, and the support 2 is relatively arranged at the outer edge of the chassis 3 along a first direction and a second direction respectively, and the first direction is perpendicular to the second direction. The bottom of the chassis 3 and the support 2 are fixedly connected to the building structure. The constraint device 8 is horizontally sleeved on the upper part of the mass sphere 1 so as to cause horizontal displacement when the mass sphere 1 rolls. A force transmission component is arranged on each support 2, and the connecting device 7 connects the constraint device 8 and the force transmission component. The mass sphere 1 drives the constraint device 8 to cause horizontal displacement, and the force transmission component attenuates the movement of the mass sphere 1 along the first direction and / or the second direction through the connecting device 7.

[0027] The mass sphere 1 is a mass sphere having a spherical appearance after assembly.

[0028] See attached Fig. 9 , Attachment Fig.11 As shown, the constraint device 8 is a hemispherical frame structure, and the constraint device 8 includes an annular frame 81 arranged around the middle of the mass sphere 1 and an arc frame 82 arranged around the upper half of the mass sphere 1. The annular frame 81 is sleeved on the horizontal plane at the center of the mass sphere 1, and the arc frame 82 is fixed to the top of the annular frame 81 perpendicularly to the annular frame 81. Through the combination of the annular frame 81 and the arc frame 82, the mass sphere 1 can be constrained in the constraint device 8 from the top, so that the mass sphere 1 will not be separated from the annular frame 81 while driving the constraint device 8 to move horizontally, thereby avoiding the failure of the damper.

[0029] See attached Figure 3 As shown, a limiting side plate 32 is provided on the circumferential edge of the chassis 3 , and the limiting side plate 32 is used to limit the movement range of the mass sphere 1 to prevent the mass sphere 1 from detaching from the chassis 3 .

[0030] See attached Figure 2 As shown, the support 2 includes a slide bar 21 and fixed seats 22 at both ends of the slide bar 21 , the bottom of the fixed seat 22 is fixedly connected to the building structure, and the connecting device 7 is slidably connected to the slide bar 21 .

[0031] See attached Figure 8As shown, the connecting device 7 includes a connecting tube 71 and a telescopic rod 72. The telescopic rod 72 is telescopically arranged in the connecting tube 71. The connecting end of the connecting tube 71 is hinged to the slide bar 21, and the telescopic end of the telescopic rod 72 is hinged to the annular frame 81. When the building structure generates wind-induced vibration, the mass sphere 1 is displaced in a certain direction along with the vibration, and at the same time drives the constraint device 8 to generate a horizontal displacement, and the constraint device 8 drives the connecting device 7 to slide along the slide bar 21. Since the connecting device 7 adopts a telescopic structure, when the mass sphere 1 moves, the constraint device 8 is always in a translation state and does not rotate around any axis, so that the vertical displacement of the mass sphere 1 is eliminated, and the constraint device has the same displacement as the center of the ball when the mass sphere 1 rolls, so that the horizontal displacement of the slider 6 is consistent with the horizontal displacement of the mass sphere 1.

[0032] See attached Figure 4-6 As shown, the force transmission assembly includes an elastic member 4, a sliding device and a damping member 5. The sliding device is used to connect the elastic member 4 and the sliding rod 21. The elastic member 4 is detachably connected to the sliding device.

[0033] The sliding device includes a pair of sliding connection seats 6 and a connecting rod 41 passing through the sliding connection seats 6. The sliding connection seats 6 are slidably connected to the sliding rod 21, and the connecting rod 41 is detachably fixedly connected to the sliding connection seats 6.

[0034] The sliding connection seat 6 is provided with a first through hole 61 and a second through hole 62, and the slide rod 21 passes through the first through hole 61, so that the sliding connection seat 6 can slide along the slide rod 21. The second through hole 62 is located below the first through hole 61, and the end of the connecting rod 41 passes through the second through hole 62 and is fixedly connected to the sliding connection seat 6 by bolts.

[0035] The connecting tube 71 is located between the two sliding connecting seats 6. When the mass sphere 1 drives the constraint device 8 to produce horizontal displacement, the constraint device 8 drives the connecting device 7 to displace, and the connecting device 7 simultaneously pushes the sliding connecting seat 6 to slide along the slide rod 21.

[0036] It also includes a limit base 9 arranged in pairs, the bottom of the limit base 9 is fixed on the building structure, the limit base 9 has a bottom plate and two side plates, the side plates are perpendicular to the bottom plate and fixedly connected to the bottom plate, and a through groove that can be connected to the seat 6 through the sliding connection is formed between the two side plates, and the through groove is located below the slide rod 21.

[0037] See attached Fig.10As shown, the elastic member 4 is sleeved on the connecting rod 41, and the two ends of the elastic member 4 are provided with a limit plate 42, and the middle part of the limit plate 42 is provided with a third through hole 421 for passing the connecting rod 41, and the limit plates 42 at both ends of the elastic member 4 abut against the sliding connection seats 6 at both ends of the connecting rod 41. The width of the limit plate 42 is greater than the through groove of the limit base 9, so that the elastic member 4 is limited between the two limit bases 9 through the limit plates 42 at both ends, and the total length of the elastic member 4 with the limit plate 42 is the same as the spacing between the two limit plates 42, so that a limit area for the elastic member 4 is formed between the two limit plates 42. The elastic member 4 of this embodiment adopts a spring.

[0038] When the mass sphere 1 drives the constraint device 8 to produce horizontal displacement under wind-induced vibration, the constraint device 8 drives the connecting device 7 to displace, and the connecting device 7 simultaneously pushes the sliding connecting seat 6 to slide along the slide rod 21. When the sliding connecting seat 6 at one end slides out of the limiting area of ​​the limiting base 9 on the elastic member 4, the sliding connecting seat 6 at the other end opposite thereto squeezes the elastic member 4, causing the spring to generate elastic force, giving the sliding connecting seat 6 a reaction force to attenuate the vibration of the mass sphere 1.

[0039] See attached Figure 7 As shown, one end of the damping member 5 is connected to the inner wall of the fixed seat 22, and the other end of the damping member 5 is connected to the sliding connection seat 6. The extension direction of the damping member 5 is the same as the sliding direction of the sliding connection seat 6. The damping member 5 is used to absorb the vibration energy transmitted by the connecting device 7 to slow down the vibration of the mass sphere 1.

[0040] The damping member 5 includes a cylinder 51 and a piston 52. The end of the piston 52 connected to the sliding connection seat 6 is provided with a hinge seat 53, and the piston 52 is hinged to the side wall of the sliding connection seat 6 through the hinge seat 53. The end of the cylinder 51 connected to the fixed seat 22 is also provided with a hinge seat 53, and the cylinder 51 is hinged to the inner side wall of the fixed seat 22 through the hinge seat 53.

[0041] When the mass sphere 1 drives the constraint device 8 to produce horizontal displacement under wind-induced vibration, the constraint device 8 drives the connection device 7 to move, and the connection device 7 simultaneously pushes the sliding connection seat 6 to slide along the slide rod 21. When the sliding connection seat 6 at one end slides out of the limiting area of ​​the limiting base 9 on the elastic member 4, the sliding connection seat 6 on this side drives the piston 52 of the damping member 5 to give the sliding connection seat 6 a reverse damping force. At this time, the sliding connection seat 6 at the other end opposite to it squeezes the corresponding end of the elastic member 4 in the limiting area of ​​the limiting base 9, so that the elastic member 4 generates elastic force, giving the sliding connection seat 6 located in the limiting area a reaction force. The reverse force generated by the elastic member 4 and the damping member 5 on the sliding connection seat 6 is transmitted to the building structure in two force transmission paths to attenuate the vibration generated by the building structure.

[0042] The above force transmission path includes: the reaction force is transmitted to the mass sphere 1 through the connecting device 7, and then transmitted to the chassis 3 through the mass sphere 1, and the chassis 3 is transmitted to the building structure; and the reaction force is transmitted to the building structure through the support 2 and the limiting base 9.

[0043] The elastic member 4 sleeved on the connecting rod 41 can be replaced by disassembling the connecting rod 41, removing the bolt at the end of the connecting rod 41, and removing the connecting rod 41 from the second through hole 62, and then the elastic member 4 can be replaced. By replacing the elastic member 4, the stiffness of the elastic member can be adjusted, thereby adjusting the natural vibration period of the damper, so that the natural vibration period of the damper is adjusted to match the natural vibration period of the building, and the vibration reduction effect is more prominent and stable. At the same time, the bidirectional passive tuned mass damper of the present application is provided with force transmission components in both directions (the first direction and the second direction), so that the damper can achieve bidirectional control of a single mass sphere 1, thereby achieving bidirectional control of wind-induced vibration of the building structure.

[0044] The present invention also provides a tuning method for a bidirectional passive tuned mass damper, the steps of which are as follows: Step 1: Identify the two translation cycles of the building structure; Step 2: Calculate the first direction of the bidirectional passive tuned mass damper T 1 and second direction T The natural oscillation period of 2 is calculated as follows: in, T 1. T 2 are the natural oscillation periods in the first and second directions respectively, m is the total mass of mass sphere 1, g is the acceleration due to gravity, R , r are the orbit curvature radius and the mass sphere radius, k 1. k 2 are the elastic recovery stiffness of the elastic member 4 in the first direction and the second direction of the bidirectional passive tuned mass damper respectively; Step 3: According to the calculation result of step 2, it is determined whether the natural vibration period of the bidirectional passive tuned mass damper matches the translation period of the building structure. If they match, the tuning is completed. If it does not match, adjust R , r , k 1. k 2, repeat step 2 until the natural vibration period of the bidirectional passive tuned mass damper matches the two translation periods of the building structure; Among them, the first two modes of the building structure are both translational states (this translation is relative to the torsion of the structural plane, that is, the building plane does not torsion, and the structure itself is bending deformation), each mode corresponds to a natural vibration period, so the two translational modes have two natural vibration periods. Correspondingly, the natural vibration periods in two directions of the bidirectional passive tuned mass damper must match the two translational periods of the building structure to achieve the effect of bidirectional vibration reduction.

[0045] Step 4: Adjust according to step 3 R , r , k 1. k 2, and replace the mass sphere 1 and the elastic member 4 that match the parameters of the bidirectional passive tuned mass damper, and the tuning is completed.

[0046] Through the above tuning method, the two natural vibration periods of the bidirectional passive tuned mass damper can be close to the two translation periods of the building structure, so as to achieve the purpose of bidirectional vibration reduction.

[0047] As attached Fig.12 , Attachment Fig.13 As shown, taking the working condition of a 70-story shear wall structure under a 50-year return period pulsating wind load as an example, numerical simulation is used to simulate the bidirectional acceleration response of the top floor of the structure, and the corresponding time history curve is obtained. It is found that under the control of the bidirectional passive tuned mass damper of the present invention, the bidirectional acceleration response of the top floor of the structure has an obvious peak clipping effect, indicating that the bidirectional passive tuned mass damper of the present invention has good vibration reduction performance.

[0048] On this basis, the vertical space occupied by the bidirectional passive tuned mass damper of the present invention is less than 3 m, the vertical space occupied by the traditional pendulum TMD is greater than 7 m, and the vertical space occupied by the device of the present invention is smaller.

[0049] The present invention provides a bidirectional passive tuned mass damper, which places a single mass sphere 1 on a chassis 3 with a groove 31, replacing the existing pendulum-type TMD device that suspends a single sphere, saving vertical building space and improving space utilization. At the same time, it can significantly improve the "detuning" of the traditional rolling TMD device and achieve a bidirectional vibration reduction effect.

[0050] By setting the constraint device 8 to constrain the mass sphere 1, the movement of the mass sphere 1 can be constrained. In the process of the mass sphere 1 rolling and pushing the constraint device 8, the connecting device 7 eliminates the vertical displacement of the mass sphere 1, so that the horizontal displacement of the slider 6 is consistent with the horizontal displacement of the mass sphere 1.

[0051] By setting the bidirectional support 2 as a force transmission structure, the displacement generated by the mass sphere 1 can be transmitted to the force transmission component on the support 2, and then the damping force provided by the force transmission component is transmitted to the building structure.

[0052] By setting the sliding connection seat 6 as a force transmission carrier, the mass sphere 1 can be subjected to the force of the spring 4 and the damping member 5 during the rolling process. By setting a detachable connecting rod 41 in the second through hole 62 at the bottom of the sliding connection seat 6, the bidirectional passive tuned mass damper can change the spring stiffness by replacing the elastic member 4 according to the use change of the building structure, so as to achieve bidirectional tuning of the passive tuned mass damper, making the vibration reduction effect more prominent and stable.

[0053] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0056] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0057] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A bidirectional passive tuned mass damper, characterized in that: include: A chassis (3), a mass sphere (1), a support (2), a restraining device (8), a connecting device (7) and a force transmission component; The mass sphere (1) can be placed on the chassis (3) in a rolling manner; The restraining device (8) is a hemispherical frame structure, which is horizontally sleeved on the upper part of the mass sphere (1); The support (2) is arranged relatively to the outer edge of the base plate (3) along a first direction and a second direction respectively, and the first direction is perpendicular to the second direction; A force transmission component is arranged on each of the supports (2); the connection device (7) is a retractable structure; the connection device (7) connects the constraint device (8) and the force transmission component to attenuate the displacement of the mass sphere (1) caused by the vibration of the building structure.

2. The bidirectional passive tuned mass damper according to claim 1, characterized in that: The support (2) comprises a pair of fixing seats (22) fixed on the building structure, and a sliding rod (21) fixedly connected between the fixing seats (22), and the connecting device (7) is slidably connected to the sliding rod (21).

3. The bidirectional passive tuned mass damper according to claim 2, characterized in that: The force transmission assembly comprises an elastic member (4) and a sliding device for connecting the elastic member (4) to the sliding rod (21); the elastic member (4) and the sliding device are detachably connected.

4. The bidirectional passive tuned mass damper according to claim 3, characterized in that: The sliding device comprises sliding connection seats (6) arranged in pairs and a connecting rod (41) passing through the sliding connection seats (6); the sliding connection seats (6) are slidably connected to the sliding rod (21); and the connecting rod (41) is fixedly connected to the sliding connection seats (6) by bolts.

5. The bidirectional passive tuned mass damper according to claim 4, characterized in that: The end portion of the connecting device (7) connected to the sliding rod (21) is located between the two sliding connecting seats (6), and the connecting device (7) can push the sliding connecting seat (6) to slide along the sliding rod (21).

6. The bidirectional passive tuned mass damper according to claim 4, characterized in that: It also includes position limiting bases (9) arranged in pairs, the bottoms of the position limiting bases (9) being fixedly connected to the building structure; The limiting base (9) has a through slot that can pass through the sliding connection seat (6), the through slot is located below the sliding rod (21), and the communication direction of the through slot is consistent with the extension direction of the sliding rod (21).

7. The bidirectional passive tuned mass damper according to claim 6, characterized in that: The elastic member (4) is sleeved on the connecting rod (41), and limit plates (42) are provided at both ends of the elastic member (4), and the limit plates (42) are in contact with the sliding connection seat (6); The width of the limiting plate (42) is greater than the through slot of the limiting base (9), so that a limiting area for the elastic member (4) is formed between the two limiting plates (42).

8. The bidirectional passive tuned mass damper according to claim 4, characterized in that: It also comprises a damping member (5), one end of the damping member (5) being connected to the inner side wall of the fixing seat (22), the other end of the damping member (5) being connected to the sliding connection seat (6), and the telescopic direction of the damping member (5) being the same as the sliding direction of the sliding connection seat (6).

9. A method for tuning a bidirectional passive tuned mass damper, characterized in that: The bidirectional passive tuned mass damper as claimed in any one of claims 1 to 8 comprises the following steps: Step 1: Identify the two translation cycles of the building structure; Step 2: Calculate the first direction of the bidirectional passive tuned mass damper T 1 and second direction T The natural oscillation period of 2 is calculated as follows: in, T 1 is the natural oscillation period in the first direction, T 2 is the natural oscillation period in the second direction, m is the total mass of the mass sphere (1), g is the acceleration due to gravity, R is the radius of curvature of the track, r is the radius of the mass sphere, k 1 is the elastic recovery stiffness of the elastic member (4) in the first direction, k 2 is the elastic recovery stiffness of the elastic member (4) in the second direction; Step 3: judging whether the natural vibration period of the bidirectional passive tuned mass damper matches the translation period of the building structure according to the calculation result of step 2, if they match, the tuning is finished; If it does not match, adjust R, r, k 1 、k 2, and repeat step 2 until the natural vibration period of the bidirectional passive tuned mass damper matches the two translation periods of the building structure.

10. The tuning method of a bidirectional passive tuned mass damper according to claim 9, characterized in that: Also includes: Step 4: Adjust according to step 3 R , r , k 1. k 2, and replace the mass sphere (1) and the elastic member (4) matching the parameters of the bidirectional passive tuned mass damper, and the tuning is completed.

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