Tuned mass damper with adjustable frequency

Abstract

The invention relates to the technical field of dampers, in particular to a tuned mass damper with adjustable frequency. The tuned mass damper comprises a supporting component and a damping component, wherein the supporting component is used for being connected with the component to be damped; the first elastic component is provided with a fixed part and a vibration part, and the fixed part is connected with the supporting component; the mass block clamps the vibration part, the distance from the end, close to the supporting component, of the vibration part to the mass center of the mass block is the effective length of the first elastic component, and the mass block can move in the length direction of the first elastic component so as to adjust the effective length of the first elastic component; and the damping component can provide damping in vibration. The mass block can move in the length direction of the first elastic component, the effective length of the first elastic component is adjusted so as to adjust the rigidity of the first elastic component, meanwhile, the resistance limiting vibration of the mass block is adjusted, and therefore the frequency of the tuned mass damper is changed.

Description

Technical Field

[0001] The present application relates to the technical field of dampers, and in particular to a frequency-adjustable tuned mass damper. Background Art

[0002] For complex mechanical structures, the whole structure contains multiple natural frequencies and modal vibration shapes. Some modal vibration amplitudes are large, which will have an adverse effect on the function of the mechanical structure. A short-cycle, low-cost method is needed to suppress the vibration level of the corresponding frequency. Passive tuned mass dampers have simple structures, no maintenance, no energy supply, and have the advantages of short processing cycles, low processing costs, and good vibration reduction effects. Therefore, they are widely used in vibration reduction of mechanical mechanisms and building structures.

[0003] The tuned mass damper is a component composed of spring, mass and damping units used to suppress structural vibration at a fixed frequency. The principle is to design the frequency of the tuned mass damper to be close to the frequency of the main structure whose vibration needs to be suppressed, and to achieve the purpose of reducing the vibration of the main structure by transferring energy from the main structure to the damper through the interaction between the tuned mass damper and the main structure.

[0004] Most of the existing tuned mass dampers cannot flexibly adjust the frequency, damping and mass parameters, and can only be achieved by replacing the corresponding components, which is time-consuming and labor-intensive, and the adjustment parameters are all non-continuous changes, making it difficult to achieve the ideal vibration reduction effect. Summary of the invention

[0005] The present application provides a tuned mass damper with adjustable frequency, which aims to achieve flexible adjustment of frequency, damping and mass parameters, improve parameter adjustment efficiency, and enhance the vibration reduction effect of the tuned mass damper.

[0006] The present application provides a frequency-adjustable tuned mass damper, the tuned mass damper comprising:

[0007] A supporting component, the supporting component being used to be connected to the vibration-damped component;

[0008] a first elastic component, the first elastic component being provided with a fixed portion and a vibrating portion, the fixed portion being connected to the supporting component;

[0009] A mass block, wherein the mass block clamps the vibrating portion, and the distance from one end of the vibrating portion close to the supporting component to the mass center of the mass block is the effective length of the first elastic component, and the mass block can move along the length direction of the first elastic component to adjust the effective length of the first elastic component;

[0010] A damping component is provided, the damping component being capable of providing damping in vibrations.

[0011] In the present application, the mass block can move along the length direction of the first elastic component, and the effective length of the first elastic component can be adjusted to adjust the stiffness of the first elastic component, and at the same time, the resistance that limits the vibration of the mass block can be adjusted, thereby changing the frequency of the tuned mass damper. When the first elastic component, mass block and damping component used by the tuned mass damper are determined, if the frequency of the tuned mass damper has a certain deviation from the vibration frequency of the damped component to be suppressed, the present application adjusts the relative position of the mass block and the first elastic component so that the tuned mass damper can conveniently and continuously adjust the frequency, thereby having higher flexibility in actual vibration reduction applications and improving the vibration reduction effect of the tuned mass damper.

[0012] In one possible design, the mass block includes a fine adjustment block and a coarse adjustment block;

[0013] The fine adjustment block can move relative to the coarse adjustment block along the length direction of the first elastic component.

[0014] In the present application, on the basis that the mass block as a whole can move along the length direction of the first elastic component, the fine-tuning block can also move along the length direction of the first elastic component to adjust the relative position with the coarse-adjusting block and change the center of mass position of the mass block, thereby achieving fine-tuning of the effective length of the first elastic component, so as to fine-tune the stiffness of the first elastic component and achieve the effect of fine-tuning the tuned mass damper.

[0015] In a possible design, the tuned mass damper further includes a fixing member, the coarse adjustment block is provided with a fixing hole, the fine adjustment block is provided with an adjustment hole, and part of the fixing member can pass through the adjustment hole and be connected to the fixing hole;

[0016] The fixing member can be connected to any position of the adjustment hole to change the relative position of the fine adjustment block and the coarse adjustment block.

[0017] In the present application, the fine-tuning block is provided with four adjustment holes, and the corresponding coarse-tuning block is provided with four fixing holes, and the fine-tuning block and the coarse-tuning block are connected by four fixings. By loading and unloading the four fixings, the relative position of the fine-tuning block and the coarse-tuning block can be adjusted (along the length direction of the first elastic component), thereby adjusting the center of mass of the mass block, changing the effective length of the first elastic component, and then adjusting the natural frequency of the tuned mass damper. In addition, the fine-tuning block and the coarse-tuning block are detachably connected by fixings, which is also convenient for replacing coarse-tuning blocks or fine-tuning blocks of different masses, thereby facilitating large-scale adjustment or fine-tuning of the mass parameters of the tuned mass damper according to actual needs.

[0018] In one possible design, the coarse adjustment block includes an upper block and a lower block, and part of the vibrating portion is clamped between the upper block and the lower block;

[0019] The upper block is detachably connected to the lower block.

[0020] In the present application, the coarse adjustment block is composed of an upper and lower block, and the vibrating part of the first elastic component is clamped between the upper block and the lower block to realize the connection between the first elastic component and the mass block. The upper block and the lower block are set as a quick-release structure, which is convenient for adjusting the relative position of the mass block and the first elastic component, and for quickly replacing the first elastic component or the mass block according to different needs, thereby achieving the effect of quickly adjusting the stiffness and mass.

[0021] In a possible design, an upper limit groove is provided at one end of the upper block close to the lower block, and a lower limit groove is provided at one end of the lower block close to the upper block, and the upper limit groove and the lower limit groove are relatively formed to form a limit space;

[0022] Part of the vibrating portion is arranged in the limiting space.

[0023] In the present application, limiting grooves are set on the upper block and the lower block. When installing the coarse adjustment block and the first elastic component, the partial vibrating part of the first elastic component can be placed in the lower limiting groove of the lower block first, and then the upper block can be covered on the lower block, so as to facilitate the alignment of the upper block and the lower block. At the same time, the partial vibrating part of the first elastic component is limited in the limiting space, so as to limit the movement of the first elastic component relative to the coarse adjustment block along the width direction of the first elastic component.

[0024] In a possible design, the support component includes an upper support block and a lower support block, and the fixing portion is fixed between the upper support block and the lower support block;

[0025] The upper supporting block is detachably connected to the lower supporting block.

[0026] In the present application, the support component is composed of an upper support block and a lower support block, and the fixed part of the first elastic component is clamped between the upper support block and the lower support block to achieve the connection between the first elastic component and the support component. The upper support block and the lower support block are set as a quick-release structure, which is convenient for adjusting and quickly replacing the first elastic component according to different needs, thereby achieving the effect of quickly adjusting the stiffness.

[0027] In a possible design, an upper fixing groove is provided at one end of the upper support block close to the lower support block, and a lower fixing groove is provided at one end of the lower support block close to the upper support block, and the upper fixing groove and the lower fixing groove are opposite to form a fixed space;

[0028] The fixing portion is fixed to the fixing space, and both the fixing space and the fixing portion are cross-shaped.

[0029] In the present application, fixing grooves are provided on the upper support block and the lower support block. When installing the support component and the first elastic component, the fixing part of the first elastic component can be placed in the lower fixing groove of the lower support block first, and then the upper support block is covered on the lower support block, so as to facilitate alignment of the upper support block and the lower support block, and fix the fixing part of the first elastic component in the fixing space at the same time. In the thickness direction of the first elastic component, the cross-sections of the fixing space and the fixing part are both cross-shaped structures. Through the cooperation of the fixing part and the fixing space, the first elastic component is limited from being separated from the support component after being stressed, so as to ensure the stability of the connection between the first elastic component and the support component.

[0030] In a possible design, the damping component is a rubber strip, and the first elastic component is two metal plates;

[0031] The rubber strip is clamped between the two metal plates.

[0032] In the present application, the vibration of the mass block can drive the two metal plates to bend, so that the two metal plates have relative movement, drive the rubber strip to shear and deform, and the rubber shear consumes energy, attenuating the vibration of the tuned mass damper. The quick-release structure of the coarse adjustment block facilitates the replacement of the first elastic component, and also facilitates the replacement of damping elements with different damping parameters, thereby facilitating the adjustment of the damping parameters of the tuned mass damper to achieve the optimal damping ratio and improve the vibration reduction effect of the tuned mass damper.

[0033] In a possible design, the damping component is an electromagnetic damper, and the mass block is made of metal;

[0034] The electromagnetic damper is mounted on the component to be damped.

[0035] In the present application, the electromagnetic damper generates a magnetic field when it is energized, and the magnetic field damps the movement of the mass block. The present application can change the magnitude of the magnetic field by changing the magnitude of the current passed into the electromagnetic damper, thereby changing the resistance to the movement of the mass block. The electromagnetic damper has better damping adjustability, and there is no need to disassemble or replace the damping components, only the electromagnetic parameters need to be adjusted.

[0036] In one possible design, the tuned mass damper further includes a second elastic component;

[0037] One end of the second elastic component is connected to the mass block, and the other end is connected to the supporting component or the vibration-damped component.

[0038] In the present application, the tuned mass damper may further include a second elastic component on the basis of the first elastic component. The second elastic component may be a spring. Through the structural form of the metal plate and the spring, the stiffness of the tuned mass damper is increased, and the frequency of the tuned mass damper may still be continuously adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of a main structure that needs vibration reduction and a tuned mass damper attached to the main structure;

[0040] Figure 2 A schematic diagram of a main view of a tuned mass damper provided in the present application;

[0041] Figure 3 for Figure 2 A top view schematic diagram in which some supporting components and some mass blocks are removed;

[0042] Figure 4 A schematic diagram of the structure of the tuned mass damper provided in this application;

[0043] Figure 5 This is a schematic diagram of the structure of the above block provided by this application;

[0044] Figure 6 This is a schematic diagram of the structure of the following blocks provided by this application;

[0045] Figure 7 This is a schematic diagram of the structure of the lower support block provided in this application;

[0046] Figure 8 is the graph of the frequency of the tuned mass damper changing with the position of the mass block;

[0047] Fig. 9 Calculation results of the effect of adding a tuned mass damper to the damped component;

[0048] Fig.10 A plot of the variation of different damping ratio settings for a tuned mass damper.

[0049] Reference numerals

[0050] 1′-main structure, 2′-tuned mass damper;

[0051] 1-tuned mass damper, 11-support component, 111-upper support block, 112-lower support block, 112a-lower fixing, 12-first elastic component, 121-fixing part, 122-vibrating part, 13-mass block, 131-fine adjustment block, 131a-adjustment hole, 132-coarse adjustment block, 132a-fixing hole, 132b-upper block, 132b1-upper limit slot, 132c-lower block, 132c1-lower limit slot, 133-lock buckle, 134-lock rod, 14-damping component, 15-fixing member;

[0052] L-effective length, Y-length direction, X-width direction, Z-thickness direction. DETAILED DESCRIPTION

[0053] like Figure 1 The main structure 1′ and the tuned mass damper 2′ on the additional main structure 1′ are shown. In the main structure 1′, m1 is the main structure mass block, k1 is the main structure elastic member, x1 is the displacement of the main structure, and w is the external force on the main structure. In the tuned mass damper 2′, m2 is the tuned mass block, k2 is the tuned elastic member, c2 is the tuned damping element, and x2 is the displacement of the tuned mass damper. The tuned mass damper 2′ is composed of a tuned mass block, a tuned elastic member, and a tuned damping element. The tuned mass block is connected to the main structure 1′ through the tuned elastic member and the tuned damping element. Among them, the tuned mass block is used to generate vibration mass, the tuned elastic member is used to adjust the self-frequency of the tuned mass damper 2′, and the tuned damping element is used to absorb the energy transmitted from the main structure 1′ to the tuned mass damper 2′ and attenuate the vibration of the tuned mass damper 2′. The vibration reduction principle of the tuned mass damper 2′ is: when the main structure 1′ vibrates, the tuned mass damper 2′ will vibrate relative to the main structure 1′. By designing the frequency of the tuned mass damper 2′ to be close to the frequency of the main structure 1′ whose vibration needs to be suppressed, the energy is transferred from the main structure 1′ to the tuned mass damper 2′ through the interaction between the tuned mass damper 2′ and the main structure 1′, thereby achieving the purpose of reducing the vibration of the main structure 1′.

[0054] In the prior art, dampers can only adjust the frequency by replacing corresponding components, such as friction wire rope tuned mass damper. The friction wire rope tuned mass damper is mainly composed of a friction wire rope and a mass block suspended below the friction wire rope. The stiffness and selection arrangement of the friction wire rope cannot be accurately predicted in advance by theoretical methods; the damping is fixed and cannot be adjusted; and the mass parameters are not convenient to adjust.

[0055] Another example is the spring fluid damping tuned mass damper. The spring fluid damping tuned mass damper consists of a connecting steel plate, a spring displacement guide rod, a spring, an adjustable mass block, and a viscous damper. The spring fluid damping tuned mass damper can only adjust its damping frequency by replacing the spring, and the frequency cannot be adjusted flexibly and continuously; the viscous damper needs to be replaced to change the damping parameters; when the mass parameters change, the spring needs to be replaced to adjust the frequency.

[0056] Therefore, most of the existing tuned mass dampers cannot flexibly adjust the frequency, damping and mass parameters, and can only be achieved by replacing the corresponding components, which is time-consuming and labor-intensive, and the adjustment parameters are all non-continuous changes, making it difficult to achieve the ideal vibration reduction effect.

[0057] To solve the above technical problems, Figure 2As shown, this embodiment provides a tuned mass damper 1, which can be applied to the fields of construction, machinery, civil engineering, etc. The tuned mass damper 1 includes a supporting component 11, a first elastic component 12, a mass block 13 and a damping component 14. The supporting component 11 is used to connect with the damped component. One end of the first elastic component 12 is fixedly connected to the supporting component 11. The mass block 13 clamps part of the first elastic component 12, and the mass block 13 can move along the length direction Y of the first elastic component 12. The damping component 14 can provide damping during vibration to attenuate the vibration displacement of the mass block 13. The natural frequency of the tuned mass damper 1 mainly depends on the effective stiffness of the first elastic component 12 and the mass of the mass block 13. The effective stiffness of the first elastic component 12 can be achieved by adjusting the effective length L of the first elastic component 12. Combined with Figure 3 As shown, in this embodiment, the first elastic component 12 is divided into a fixed part 121 and a vibrating part 122 along the length direction Y, the fixed part 121 is fixedly connected to the support component 11, the mass block 13 clamps part of the vibrating part 122, and the distance from the end of the vibrating part 122 close to the support component 11 to the mass center of the mass block 13 is the effective length L, and the mass block 13 can move relative to the vibrating part 122 along the length direction Y of the first elastic component 12 to adjust the effective length L of the first elastic component 12. Among them, the effective length of the first elastic component 12 is the position from the position where the first elastic component 12 vibrates relative to the support component 11 to the position of the mass center of the mass block 13. Since the fixed part 121 of the first elastic component 12 is fixedly connected to the support component 11, the effective length L of the first elastic component 12 is the length from the end of the vibrating part 122 close to the support component 11 to the position of the mass center of the mass block 13. Since the fixed part 121 of the first elastic component 12 is connected to the support component 11, the effective length of the first elastic component 12 is always smaller than the length of the first elastic component 12.

[0058] In this embodiment, the first elastic component 12 may be a metal plate, such as a leaf spring, and the mass block 13 may be a metal block. The vibration of the damped component is transmitted to the first elastic component 12 and the mass block 13 through the support component 11, so that the mass block 13 and the first elastic component 12 vibrate. In order to facilitate flexible adjustment of the vibration frequency of the tuned mass damper 1 so that the vibration frequency of the tuned mass damper 1 is close to the vibration frequency of the damped component, the mass block 13 of this embodiment can move along the length direction Y of the first elastic component 12, and the effective length L of the first elastic component 12 is adjusted to adjust the stiffness of the first elastic component 12, and at the same time adjust the resistance limiting the vibration of the mass block 13, thereby changing the frequency of the tuned mass damper 1. When the first elastic component 12, the mass block 13 and the damping component 14 used by the tuned mass damper 1 are determined, if the frequency of the tuned mass damper 1 has a certain deviation from the vibration frequency of the damped component to be suppressed, this embodiment adjusts the relative position of the mass block 13 and the first elastic component 12 so that the tuned mass damper 1 can adjust the frequency conveniently and continuously, thereby having higher flexibility in actual vibration reduction applications and improving the vibration reduction effect of the tuned mass damper 1.

[0059] like Figure 4 As shown, in some embodiments, in order to further adjust the frequency of the tuned mass damper 1, the mass block 13 includes a fine adjustment block 131 and a coarse adjustment block 132, and the fine adjustment block 131 can move relative to the coarse adjustment block 132 along the length direction Y of the first elastic component 12. In this embodiment, on the basis that the mass block 13 as a whole can move along the length direction Y of the first elastic component 12, the fine adjustment block 131 can also move along the length direction Y of the first elastic component 12 to adjust the relative position with the coarse adjustment block 132, change the center of mass position of the mass block 13, thereby achieving fine adjustment of the effective length L of the first elastic component 12, so as to fine-tune the stiffness of the first elastic component 12, and achieve the function of fine-tuning the tuned mass damper 1.

[0060] Specifically, Figure 4 and Figure 5As shown, the tuned mass damper 1 also includes a fixing member 15, the coarse adjustment block 132 is provided with a fixing hole 132a, the fine adjustment block 131 is provided with an adjustment hole 131a, and part of the fixing member 15 can pass through the adjustment hole 131a and connect with the fixing hole 132a. The fixing member 15 can be connected with any position of the adjustment hole 131a to change the relative position of the fine adjustment block 131 and the coarse adjustment block 132. In this embodiment, the fixing member 15 can be a screw, a bolt or the like, the adjustment hole 131a is a long hole, and the adjustment hole 131a passes through the fine adjustment mass block 131, the adjustment hole 131a has a plurality of positions that can cooperate with the fixing member 15, and the fixing hole 132a is a threaded hole. In this embodiment, the fine adjustment block 131 is provided with four adjustment holes 131a, and the corresponding coarse adjustment block 132 is provided with four fixing holes 132a, and the fine adjustment block 131 and the coarse adjustment block 132 are connected by four fixing members 15. By installing and removing the four fixing members 15, the relative position of the fine adjustment block 131 and the coarse adjustment block 132 can be adjusted (along the length direction Y of the first elastic member 12), thereby adjusting the center of mass of the mass block 13, changing the effective length L of the first elastic member 12, and then adjusting the natural frequency of the tuned mass damper 1. In addition, the fine adjustment block 131 and the coarse adjustment block 132 can be detachably connected by the fixing member 15, which is also convenient for replacing the coarse adjustment block 132 or the fine adjustment block 131 of different masses, thereby facilitating large-scale adjustment or fine-tuning of the mass parameters of the tuned mass damper 1 according to actual needs.

[0061] The fine adjustment block 131 and the coarse adjustment block 132 may also be connected in other ways to achieve that the fine adjustment block 131 can adjust its position relative to the coarse adjustment block 132 and the fine adjustment block 131 and the coarse adjustment block 132 are detachable, which is not specifically limited in this embodiment.

[0062] like Figure 4 As shown, in some embodiments, the coarse adjustment block 132 includes an upper block 132b and a lower block 132c, and a part of the vibration part 122 is clamped between the upper block 132b and the lower block 132c, and the upper block 132b and the lower block 132c are detachably connected. In this embodiment, the coarse adjustment block 132 is composed of an upper and lower block, and the vibration part 122 of the first elastic component 12 is clamped between the upper block 132b and the lower block 132c, so as to realize the connection between the first elastic component 12 and the mass block 13. The upper block 132b and the lower block 132c are set as a quick-release structure, which is convenient for adjusting the relative position of the mass block 13 and the first elastic component 12, and for quickly replacing the first elastic component 12 or the mass block 13 according to different needs, so as to achieve the effect of quickly adjusting the stiffness and quality.

[0063] Or, if Figures 4 to 6As shown, in some embodiments, an upper limit groove 132b1 is provided at one end of the upper block 132b close to the lower block 132c, and a lower limit groove 132c1 is provided at one end of the lower block 132c close to the upper block 132b. The upper limit groove 132b1 has the same structure as the lower limit groove 132c1, and the upper limit groove 132b1 and the lower limit groove 132c1 form a limit space relative to each other (not shown in the figure), and part of the vibration part 122 is arranged in the limit space. In this embodiment, a limiting groove 132b1 is set on the upper block 132b and the lower block 132c. When installing the coarse adjustment block 132 and the first elastic component 12, the partial vibrating portion 122 of the first elastic component 12 can be placed in the lower limiting groove 132c1 of the lower block 132c first, and then the upper block 132b is covered on the lower block 132c, so as to facilitate alignment of the upper block 132b and the lower block 132c. At the same time, the partial vibrating portion 122 of the first elastic component 12 is limited in the limiting space, so as to limit the movement of the first elastic component 12 relative to the coarse adjustment block 132 along the width direction X of the first elastic component 12.

[0064] The quick-release structure may be an existing quick-release structure, such as a lock buckle 133 is provided at the side end of the upper block 132b and the lower block 132c, and a lock rod 134 is provided at the side end of the other block, and the lock rod 134 cooperates with the lock buckle 133 to fix the upper block 132b and the lower block 132c. The quick-release structure may also adopt other structures, which are not specifically limited in this embodiment.

[0065] like Figure 4 As shown, in some embodiments, the support component 11 includes an upper support block 111 and a lower support block 112, and the fixing portion 121 is fixed between the upper support block 111 and the lower support block 112, and the upper support block 111 and the lower support block 112 are detachably connected. In this embodiment, the support component 11 is composed of an upper support block 111 and a lower support block 112, and the fixing portion 121 of the first elastic component 12 is clamped between the upper support block 111 and the lower support block 112 to achieve the connection between the first elastic component 12 and the support component 11. The upper support block 111 and the lower support block 112 are set as a quick-release structure, which is convenient for adjusting the first elastic component 12 and the damping component 14 to be quickly replaced according to different needs, thereby achieving the effect of adjusting stiffness and damping.

[0066] Specifically, Figure 4 and Figure 7As shown, an upper fixing groove (not shown in the figure) is provided at one end of the upper support block 111 close to the lower support block 112, and a lower fixing groove 112a is provided at one end of the lower support block 112 close to the upper support block 111. The upper fixing groove and the lower fixing groove 112a form a fixed space (not shown in the figure) relative to each other, and the fixing portion 121 is fixed in the fixed space, and the fixed space and the fixing portion 121 are both cross-shaped. In this embodiment, fixing grooves are provided on both the upper support block 111 and the lower support block 112. When installing the support component 11 and the first elastic component 12, the fixing portion 121 of the first elastic component can be placed in the lower fixing groove 112a of the lower support block 112 first, and then the upper support block 111 is covered on the lower support block 112, so as to facilitate alignment of the upper support block 111 and the lower support block 112, and at the same time, the fixing portion 121 of the first elastic component 12 is fixed in the fixed space. Among them, along the thickness direction Z of the first elastic component 12, the cross-sections of the fixed space and the fixed part 121 are both cross-shaped structures. The fixed part 121 cooperates with the fixed space to limit the first elastic component 12 from detaching from the supporting component 11 after being subjected to force, thereby ensuring the stability of the connection between the first elastic component 12 and the supporting component 11.

[0067] The quick-release structure may be an existing quick-release structure, such as a lock buckle 133 is provided at the side end of the upper support block 111 and the lower support block 112, and a lock rod 134 is provided at the side end of the other support block, and the lock rod 134 cooperates with the lock buckle 133 to fix the upper support block 111 and the lower support block 112. The quick-release structure may also adopt other structures, which are not specifically limited in this embodiment.

[0068] In some embodiments, the tuned mass damper 1 further includes a second elastic component (not shown in the figure), one end of the second elastic component is connected to the mass block 13, and the other end is connected to the support component 11 or the damped component. In this embodiment, the tuned mass damper 1 can also be provided with a second elastic component on the basis of providing the first elastic component 12, and the second elastic component can be a spring. Through the structural form of the metal plate and the spring, the stiffness of the tuned mass damper 1 is increased, and the frequency of the tuned mass damper 1 can still be continuously adjusted.

[0069] In some embodiments, Figure 2 and Figure 4As shown, the damping component 14 can be a rubber strip, and the first elastic component 12 is two metal plates, the rubber strip is clamped between the two metal plates, and the vibration of the mass block 13 can drive the two metal plates to bend, so that the two metal plates have relative movement, drive the rubber strip to shear deformation, and the rubber shear consumes energy to attenuate the vibration of the tuned mass damper 1. The quick-release structure of the coarse adjustment block 132 facilitates the replacement of the first elastic component 12, and also facilitates the replacement of damping elements with different damping parameters, thereby facilitating the adjustment of the damping parameters of the tuned mass damper 1 to achieve the optimal damping ratio and improve the vibration reduction effect of the tuned mass damper 1.

[0070] Alternatively, in some embodiments, the damping component 14 may be an electromagnetic damper, the mass block 13 is made of metal, the electromagnetic damper is installed on the damped component, and the electromagnetic damper generates a magnetic field when it is energized, and the magnetic field damps the movement of the mass block 13. In this embodiment, the magnitude of the magnetic field can be changed by changing the magnitude of the current passed into the electromagnetic damper, thereby changing the resistance to the movement of the mass block 13. The electromagnetic damper has better damping adjustability, and there is no need to disassemble and replace the damping component 14, and only the electromagnetic parameters need to be adjusted.

[0071] like Figure 8 The figure shows the calculated results of the effect of adding a tuned mass damper 1 to the damped component. The ordinate represents the amplitude ratio (the ratio of the amplitude of vibration to the static displacement), and the abscissa represents the ratio of the external excitation frequency to the natural frequency of the damped component. μ is the ratio of the mass of the tuned mass damper 1 to the modal mass of the damped component. As can be seen from the figure, as the mass of the mass block 13 in the tuned mass damper 1 increases, the vibration of the damped component gradually decays. Therefore, a mass parameter that is easy to adjust plays an important role in improving the damping effect of the tuned mass damper 1.

[0072] like Fig. 9 The figure shows the change of the frequency of the tuned mass damper 1 with the position of the mass block 13. The ordinate represents the frequency ratio, and the abscissa represents the effective length L ratio of the first elastic component 12. It can be seen from the figure that when the mass block 13 is adjusted to the middle position of the first elastic component 12, the frequency of the tuned mass damper 1 is more than 2.75 times that when the mass block 13 is at the end position of the first elastic component 12. Therefore, the tuned mass damper 1 in this embodiment can flexibly adjust the situation where there is a deviation in the vibration frequency of the tuned mass damper 1 and the damped component.

[0073] like Fig.10The figure shows the change of different damping ratios of the tuned mass damper 1. The ordinate represents the amplitude ratio (the ratio of the amplitude of vibration to the static displacement), and the abscissa represents the ratio of the external excitation frequency to the natural frequency of the damped component. It can be seen from the figure that if the damping ratio of the tuned mass damper 1 is too low, it will cause vibrations of other frequencies to the damped component while suppressing the vibration of a certain frequency point.

[0074] For the tuned mass damper 1 with determined mass parameters, its optimal damping ratio is:

[0075]

[0076] Among them, ζ is the optimal damping ratio, μ is the ratio of the mass of the tuned mass damper 1 to the modal mass of the damped component, and the damping parameters of the tuned mass damper 1 can be adjusted by replacing the rubber strip through the quick-release structure or adjusting the electromagnetic parameters of the electromagnetic damper, so that the damping ratio of the tuned mass damper 1 can be closer to the optimal damping ratio, thereby improving the shock absorption effect.

Claims

1. A frequency-adjustable tuned mass damper, characterized in that: The tuned mass damper comprises: A supporting component, the supporting component being used to be connected to the vibration-damped component; a first elastic component, the first elastic component being provided with a fixed portion and a vibrating portion, the fixed portion being connected to the supporting component; A mass block, wherein the mass block clamps the vibrating portion, and the distance from one end of the vibrating portion close to the supporting component to the mass center of the mass block is the effective length of the first elastic component, and the mass block can move along the length direction of the first elastic component to adjust the effective length of the first elastic component; A damping component is provided, the damping component being capable of providing damping in vibrations.

2. The frequency-adjustable tuned mass damper according to claim 1, characterized in that: The mass block includes a fine adjustment block and a coarse adjustment block; The fine adjustment block can move relative to the coarse adjustment block along the length direction of the first elastic component.

3. The frequency-adjustable tuned mass damper according to claim 2, characterized in that: The tuned mass damper further comprises a fixing member, the coarse adjustment block is provided with a fixing hole, the fine adjustment block is provided with an adjustment hole, and part of the fixing member can pass through the adjustment hole and be connected to the fixing hole; The fixing member can be connected to any position of the adjustment hole to change the relative position of the fine adjustment block and the coarse adjustment block.

4. The frequency-adjustable tuned mass damper according to claim 2, characterized in that: The coarse adjustment block includes an upper block and a lower block, and part of the vibration part is clamped between the upper block and the lower block; The upper block is detachably connected to the lower block.

5. The frequency-adjustable tuned mass damper according to claim 4, characterized in that: An upper limit groove is provided at one end of the upper block close to the lower block, and a lower limit groove is provided at one end of the lower block close to the upper block, wherein the upper limit groove and the lower limit groove form a limit space relative to each other; Part of the vibrating portion is arranged in the limiting space.

6. The frequency-adjustable tuned mass damper according to claim 1, characterized in that: The supporting member comprises an upper supporting block and a lower supporting block, and the fixing portion is fixed between the upper supporting block and the lower supporting block; The upper supporting block is detachably connected to the lower supporting block.

7. The frequency-adjustable tuned mass damper according to claim 6, characterized in that: An upper fixing groove is provided at one end of the upper support block close to the lower support block, and a lower fixing groove is provided at one end of the lower support block close to the upper support block, wherein the upper fixing groove and the lower fixing groove are opposite to each other to form a fixed space; The fixing portion is fixed to the fixing space, and both the fixing space and the fixing portion are cross-shaped.

8. The frequency-adjustable tuned mass damper according to claim 1, characterized in that: The damping component is a rubber strip, and the first elastic component is two metal plates; The rubber strip is clamped between the two metal plates.

9. The frequency-adjustable tuned mass damper according to claim 1, characterized in that: The damping component is an electromagnetic damper, and the mass block is made of metal; The electromagnetic damper is mounted on the component to be damped.

10. The frequency-adjustable tuned mass damper according to claim 1, characterized in that: The tuned mass damper further comprises a second elastic member; One end of the second elastic component is connected to the mass block, and the other end is connected to the supporting component or the vibration-damped component.

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