A distributed liquid level balance vertical damper

Abstract

The present invention relates to a distributed liquid level balance type vertical damper, comprising at least two first water tanks, at least one second water tank, and a liquid level balance connecting pipe for connecting the adjacent first water tanks and the second water tanks; a pressure regulating hole is provided on the top of the first water tank, and at least one baffle is provided in the first water tank, and the baffle is fixed to the first water tank through a fixing assembly; a closed air chamber is provided on the top of the second water tank; the present invention has a simple structure, low price, easy installation, good energy consumption capacity, good automatic activation performance, and strong frequency modulation capability, and can perform distributed design of dampers according to the vibration mode and damping characteristics of the bridge structure itself, and can provide damping for multi-order vertical bending vibration modes of the bridge, effectively control the vertical vibration of the bridge structure, and improve the comfort and safety of the bridge.

Description

Technical Field

[0001] The invention relates to the technical field of civil structure vibration control, in particular to a distributed liquid level balance type vertical damper. Background Art

[0002] The high-order vertical bending modal damping of large-span steel suspension bridges is generally low, and the modal distribution is relatively dense. Under specific wind conditions, vortex vibration is more likely to occur for blunt-body sections. Generally, a streamlined (vortex-free) main beam section with smaller vortex vibration is selected, or relevant aerodynamic measures (such as guide plates, central stabilizer plates, flow suppression plates, etc.) are adopted to avoid the occurrence of bridge vortex vibration.

[0003] However, the vortex vibration of the bridge is affected by various factors such as the incoming wind speed, wind attack angle, wind deflection angle and turbulence. Under some specific conditions, vortex vibration is still unavoidable. For large-span bridges, multi-order vortex vibration may occur. Therefore, in addition to section optimization and aerodynamic measures, it is necessary to add an additional barrier to bridge safety - damper.

[0004] Traditional dampers are mainly set for the horizontal movement and low-order modes of bridges, and have a low contribution to high-order modal damping. The use of distributed tuned mass dampers has disadvantages such as complex installation, sensitivity to structural frequency, and high maintenance costs.

[0005] In recent years, with the continuous in-depth research on structural earthquake resistance and disaster reduction, new dampers have gradually attracted people's attention. Tuned liquid column dampers (TLCDs) have also gradually been valued for their significant damping effect. By adjusting the natural frequency and the movement of liquid in a U-tube, the TLCD system can generate damping force and reduce the dynamic response of the building body; under the same mass, a TLCD system can achieve similar performance as the TMD system in terms of shock absorption. By adjusting the throttle hole, the liquid in the system can effectively adapt to the vibration of the building structure at all levels, so the system can be used as a passive damper or a semi-active damper. The TLCD system also has configuration and spatial flexibility, as well as dynamic characteristics that change from time to time. After the main structure is constructed, its parameters can be easily adjusted, but for bridges with more complex formations such as long-span bridges, its application is subject to many restrictions.

[0006] Therefore, how to provide a distributed liquid level balanced vertical damper to solve the problems existing in the prior art is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0007] In view of this, the purpose of the present application is to provide a distributed liquid level balanced vertical damper to achieve a simple structure, low price, good energy dissipation capacity, strong frequency regulation capability and easy maintenance.

[0008] In order to achieve the above objectives, this application provides the following technical solutions.

[0009] A distributed liquid level balance type vertical damper comprises at least two first water tanks, at least one second water tank, and a liquid level balance connecting pipe for connecting adjacent first water tanks and second water tanks;

[0010] A pressure regulating hole is provided on the top of the first water tank, and at least one baffle is provided in the first water tank, and the baffle is fixed on the first water tank through a fixing assembly;

[0011] A closed air chamber is arranged on the top of the second water tank.

[0012] Preferably, a slot corresponding to the baffle is provided on one side of the first water tank, and the baffle is inserted into the first water tank through the slot.

[0013] Preferably, the fixing assembly comprises a fixing plate and a sealing ring, and the sealing ring is arranged around the groove and surrounds the baffle to prevent the liquid medium in the first water tank from flowing out.

[0014] Preferably, a positioning plate is provided on one side of the first water tank facing the slot, and the positioning plate is used to position and support the baffle.

[0015] Preferably, the baffle is provided with through holes distributed at equal intervals.

[0016] Preferably, the baffle is a grid structure.

[0017] Preferably, a gauze is fixed on the baffle.

[0018] Preferably, the density of the liquid medium in the first water tank and the second water tank is greater than 1000 kg / m 3 .

[0019] Preferably, the number of the first water tanks is 4, the number of the second water tanks is 2, and every two first water tanks are respectively arranged on both sides of the second water tank.

[0020] Preferably, two baffles are provided in the first water tank, and the two baffles are arranged up and down.

[0021] Beneficial technical effects obtained by the present invention:

[0022] 1) The present invention solves the problems of traditional dampers, such as complex installation, sensitivity to structural frequency, high maintenance cost, and limited application of new dampers. The present invention has a simple structure, low price, easy installation, good energy dissipation capacity, good automatic activation performance, and strong frequency modulation capability, and has great engineering significance;

[0023] 2) The present invention adjusts the damping ratio of the tuned liquid damper by adjusting the length of the baffle plate in the water tank, thereby achieving the optimal damping ratio of the design and achieving the best effect of vibration control, while having a wide damping ratio adjustment range;

[0024] 3) The present invention can adjust the arrangement of the damper and the height of the air spring according to the actual vibration conditions and frequency of the structure, adapt to vertical vibrations of different modes, and has a wide frequency adjustment range;

[0025] 4) The present invention can perform distributed design of dampers according to the vibration modes and damping characteristics of the bridge structure itself, provide damping for multi-order vertical bending vibration modes of the bridge, effectively control the vertical vibration of the bridge structure, and improve the comfort and safety of the bridge.

[0026] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings as follows.

[0027] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0029] Figure 1 It is a structural schematic diagram of a distributed liquid level balance type vertical damper in an embodiment of the present disclosure;

[0030] Figure 2 is a top view of a distributed liquid level balance type vertical damper in an embodiment of the present disclosure;

[0031] Figure 3 Yes Figure 1 Sectional view of the AA plane;

[0032] Figure 4 Yes Figure 3 The enlarged view of point B in the middle;

[0033] Figure 5is a schematic structural diagram of a baffle in an embodiment of the present disclosure;

[0034] Figure 6 is a structural schematic diagram of a baffle in another embodiment of the present disclosure;

[0035] Figure 7 It is a structural schematic diagram of a distributed liquid level balance type vertical damper in another embodiment of the present disclosure.

[0036] In the above drawings: 10, first water tank; 101, slot; 102, positioning plate; 20, second water tank; 30, liquid level balance connecting pipe; 40, baffle; 401, through hole; 50, fixing component; 501, fixing plate; 502, sealing ring; 60, pressure regulating hole; 70, closed air chamber; 80, liquid medium. DETAILED DESCRIPTION

[0037] To make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, rather than all of the embodiments. In the following description, specific details such as specific configuration and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures is omitted in the embodiment.

[0038] It should be understood that the references to "one embodiment" or "this embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present application. Therefore, the references to "one embodiment" or "this embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0039] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0040] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0041] The term "at least one" in this article is merely a description of the association relationship of associated objects, indicating that there may be three relationships. For example, at least one of A and B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0042] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusions.

[0043] Example 1

[0044] As attached Figure 1 As shown, a distributed liquid level balance type vertical damper includes at least two first water tanks 10 , at least one second water tank 20 , and a liquid level balance connecting pipe 30 for connecting adjacent first water tanks 10 and second water tanks 20 .

[0045] The first water tank 10 and the second water tank 20 are rectangular parallelepiped structures.

[0046] Alternatively, the first water tank 10 and the second water tank 20 are cylindrical structures.

[0047] A pressure regulating hole 60 is provided on the top of the first water tank 10, and the pressure regulating hole 60 is used to adjust the pressure in the water tank to adjust the liquid level difference H0.

[0048] A baffle 40 is disposed in the first water tank 10 , and the baffle 40 is fixed to the first water tank 10 via a fixing assembly 50 .

[0049] As attached Figure 2 As shown, the number of the first water tanks 10 is 4, the number of the second water tanks 20 is 2, and every two first water tanks 10 are respectively arranged on both sides of the second water tank 20, and the adjacent water tanks are connected by a liquid level balancing connecting pipe 30 to achieve communication of the liquid medium 80 in the water tank.

[0050] As attached Figure 3As shown, a closed air chamber 70 is provided on the top of the second water tank 20. The closed air chamber 70 realizes the function of an air spring. The natural frequency of the distributed damper is adjusted by changing the air height Ha in the closed air chamber 70. The virtual height of the air spring in the closed air chamber 70 is the main parameter affecting the natural frequency of the damper.

[0051] The density of the liquid medium 80 in the first water tank 10 and the second water tank 20 is greater than 1000 kg / m 3 .

[0052] Preferably, the liquid medium 80 is montmorillonite ρ=2300kg / m 3 .

[0053] As attached Figure 4 As shown, a slot 101 corresponding to the baffle 40 is provided on one side of the first water tank 10 , and the baffle 40 is inserted into the first water tank 10 through the slot 101 .

[0054] The fixing assembly 50 includes a fixing plate 501 and a sealing ring 502 . The sealing ring 502 is disposed around the slot 101 and surrounds the baffle 40 to prevent the liquid medium 80 in the first water tank 10 from flowing out.

[0055] The fixing plate 501 is disposed on the outside of the first water tank 10 and fixed on the first water tank 10 . Positioning holes are disposed on both the baffle plate 40 and the fixing plate 501 . The baffle plate 40 is fixed on the fixing plate 501 by bolts and nuts.

[0056] Alternatively, the baffle plate 40 is fixed to the fixing plate 501 by screws.

[0057] A positioning plate 102 is provided on one side of the first water tank 10 facing the slot 101 , and the positioning plate 102 is used to position and support the baffle 40 .

[0058] In one embodiment, the baffle 40 is fixed in the first water tank 10 in a detachable manner, so that baffles 40 with different characteristics can be used according to different requirements.

[0059] In one embodiment, the length of the baffle 40 extending into the first water tank 10 is adjustable, so as to adjust the damping ratio of the tuned liquid damper, achieve the optimal designed damping ratio, realize the best vibration control effect, and have a wider damping ratio adjustment range.

[0060] As attached Figure 5 As shown, the baffle 40 is provided with a certain number of through holes 401 distributed at equal intervals.

[0061] In one embodiment, as shown in the attached Figure 6As shown, the baffle 40 is a grid structure.

[0062] In one embodiment, the baffle plate 40 is a grid structure, and a gauze is fixed on the baffle plate 40 .

[0063] In another embodiment, as shown in the attached Figure 7 As shown, two baffles 40 are disposed in the first water tank 10 , and the two baffles 40 are arranged up and down.

[0064] The working principle of the above-mentioned distributed liquid level balance type vertical damper is: According to the non-static Bernoulli equation, the frequency of the distributed damper is designed according to the main frequency of the vertical vibration of the bridge structure:

[0065]

[0066] In the formula, h0 represents the liquid level height corresponding to the standard atmospheric pressure P0, for water h0≈10m;

[0067] n represents the variable gas compression index used for linearization, ranging from 1.1 to 1.4;

[0068] L is the total length of the streamline;

[0069] H a =V / A is the virtual height of the air spring in the closed air chamber 70 .

[0070] The second main design parameter of the distributed damper is damping, which is mainly controlled by adjusting the length of the baffle 40 in the water tank through the fixing assembly 50. When the baffle 40 is adjusted, the flow rate of the liquid flowing around the baffle 40 changes, and the resistance coefficient and the inertia force coefficient also change, so the liquid force on the baffle 40 also changes, resulting in damping of different effects, while affecting the vibration effect of the liquid.

[0071] The above-mentioned distributed liquid level balance type vertical damper adjusts the damping ratio of the tuned liquid damper by adjusting the length of the baffle 40 in the water tank to achieve the designed optimal damping ratio and the best vibration control effect, and at the same time has a wide damping ratio adjustment range; it can adjust the arrangement of the damper and the height of the air spring according to the actual vibration conditions and frequency of the structure to adapt to vertical vibrations of different modes, and the frequency adjustment range is wide; it can perform distributed design of the damper according to the vibration mode and damping characteristics of the bridge structure itself, and can provide damping for multiple vertical bending vibration modes of the bridge, effectively control the vertical vibration of the bridge structure, and improve the comfort and safety of the bridge.

[0072] The above-mentioned distributed liquid level balanced vertical damper solves the problems existing in traditional dampers, such as complex installation, sensitivity to structural frequency, high maintenance cost, and limited application of new dampers. The present invention has a simple structure, low price, easy installation, good energy consumption capacity, good automatic activation performance, and strong frequency regulation capability, and has great engineering significance.

[0073] The above description is only the preferred embodiment of the present invention, which does not limit the protection scope of the present invention. For those skilled in the art, the present invention can be modified and varied in various ways. Within the spirit and principle of the present invention, any change, modification, replacement, integration and parameter change of these embodiments by conventional substitution or capable of achieving the same function without departing from the principle and spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A distributed level balance type vertical damper, characterized in that: It comprises at least two first water tanks (10), at least one second water tank (20), and a liquid level balancing connecting pipe (30) for connecting adjacent first water tanks (10) and second water tanks (20); The top of the first water tank (10) is provided with a pressure regulating hole (60) for adjusting the pressure in the water tank to adjust the liquid level difference; At least one horizontal baffle (40) is arranged in the first water tank (10), and the horizontal baffle (40) is fixed to the first water tank (10) via a fixing assembly (50); A sealed air chamber (70) is provided on the top of the second water tank (20); The horizontal baffle (40) is provided with through holes (401) distributed at equal intervals; it is a grid structure; a gauze is fixed on the horizontal baffle (40); The number of the first water tanks (10) is four, the number of the second water tanks (20) is two, and every two first water tanks (10) are respectively arranged on both sides of the second water tank (20).

2. The distributed liquid level balance type vertical damper according to claim 1 is characterized in that: A slot (101) corresponding to the horizontal baffle (40) is provided on one side of the first water tank (10), and the horizontal baffle (40) passes through the slot (101) and is inserted into the first water tank (10).

3. The distributed liquid level balance type vertical damper according to claim 2 is characterized in that: The fixing assembly (50) comprises a fixing plate (501) and a sealing ring (502). The sealing ring (502) is arranged around the slot (101) and surrounds the horizontal baffle (40) to prevent the liquid medium (80) in the first water tank (10) from flowing out.

4. The distributed liquid level balance type vertical damper according to claim 2 is characterized in that: A positioning plate (102) is provided on one side of the first water tank (10) facing the slot (101), and the positioning plate (102) is used to position and support the horizontal baffle (40).

5. The distributed liquid level balance type vertical damper according to claim 1, characterized in that: The density of the liquid medium (80) in the first water tank (10) and the second water tank (20) is greater than 1000 kg / m 3 .

6. The distributed liquid level balance type vertical damper according to claim 1, characterized in that: Two horizontal baffles (40) are arranged in the first water tank (10), and the two horizontal baffles (40) are arranged up and down.

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