Multi-stage adjustable gas-liquid tuned mass damper and design method thereof

Abstract

The invention discloses a multi-stage adjustable gas-liquid tuned mass damper and a design method thereof.The multi-stage adjustable gas-liquid tuned mass damper comprises a damper body, an annular hole channel is formed in the damper body, separation membranes are arranged in two vertical sections of the annular hole channel, a gas chamber is defined between the upper portions of the two separation membranes, a plurality of partition plates are arranged in the gas chamber, and a gas bin is formed between every two adjacent partition plates; an electric valve is installed on the partition plate, a liquid chamber is defined between the lower portions of the two separation films, a damping plate is arranged in the liquid chamber, and an electric door plate is installed on a through hole of the damping plate; the inflator pump is connected to the air hole in the damper body; the acquisition module comprises an air pressure sensor and an acceleration sensor; the controller comprises a control module and an edge calculation module connected to the control module, and the control module is connected to the electric valve, the electric door plate, the inflator pump, the air pressure sensor and the acceleration sensor. The problems that when a traditional tuned mass damper deals with complex vibration, the frequency adjusting range is narrow, and adaptability is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly relates to a gas-liquid tuned mass damper capable of multi-stage adjustment and a design method thereof. Background Art

[0002] In the modern engineering field, especially in civil engineering and mechanical engineering, dampers, as an important shock-absorbing device, are widely used in various structures to reduce the influence of vibration and impact. The design and performance of dampers directly affect the stability and safety of the entire system.

[0003] Traditional tuned mass dampers (TMD) have problems such as a narrow frequency adjustment range and poor adaptability when dealing with complex vibrations, and it is difficult to meet the requirements of modern engineering. Summary of the Invention

[0004] In order to overcome the defects of the prior art, there is provided a gas-liquid tuned mass damper capable of multi-stage adjustment and a design method thereof to solve the problems of narrow frequency adjustment range and poor adaptability of traditional tuned mass dampers when dealing with complex vibrations.

[0005] To achieve the above object, there is provided a gas-liquid tuned mass damper capable of multi-stage adjustment, including:

[0006] A damper body vertically arranged and in a loop shape, an annular channel is formed in the damper body and arranged in a circle along the circumferential direction of the damper body. Partition membranes are provided in the two vertical sections of the annular channel. An air chamber is formed by enclosing between the upper parts of the two partition membranes. Multiple partition plates are provided in the air chamber and are spaced along the length direction of the air chamber. An air storage chamber for filling gas is formed between two adjacent partition plates. Electric valves are installed on the partition plates. A liquid chamber for filling liquid is formed by enclosing between the lower parts of the two partition membranes. Damping plates are respectively provided at the opposite ends of the liquid chamber. Through holes are formed on the damping plates, and electric door plates for controlling the opening size of the through holes are installed on the damping plates;

[0007] An air inflation pump, an air hole communicating with the air chamber is provided on the damper body, and the air inflation pump is connected to the air hole;

[0008] A collection module, including a barometric pressure sensor for collecting the pressure in the air storage chamber and an acceleration sensor for collecting the acceleration of the damper body and the structure connected to the damper body;

[0009] The controller includes a control module and an edge computing module connected to the control module. The control module is connected to the electric valve, the electric door panel, the air pump, the air pressure sensor, and the acceleration sensor. The edge computing module calculates the target stiffness of the damper body based on the vibration states of the damper body and the structure. The control module adjusts the pressure and volume of the air chamber through the air pump and the electric valve based on the stiffness of the damper body, and adjusts the opening size of the through holes of the damper plate through the electric door panel to make the actual stiffness of the damper body conform to the target stiffness.

[0010] Further, the number of the through holes is multiple, the through holes are fan-shaped, and the multiple through holes are arranged at equal intervals along the circumferential direction of the damper plate.

[0011] Further, the electric door panel includes:

[0012] A rotating shaft, one end of the rotating shaft is rotatably installed on the damper plate, and the other end of the rotating shaft extends to the outside of the damper body;

[0013] Multiple fan-shaped plates, the number of the fan-shaped plates is adapted to the number of the through holes, the multiple fan-shaped plates are connected to one end of the rotating shaft and are arranged at equal intervals along the circumferential direction of the rotation, and the fan-shaped plates are attached to the damper plate;

[0014] A motor, which is drivingly connected to the other end of the rotating shaft.

[0015] Further, the output shaft of the motor is coaxially connected to the other end of the rotating shaft.

[0016] Further, the electric valve is an electromagnetic valve.

[0017] The present invention provides a design method for a multi-stage adjustable gas-liquid tuned mass damper, including the following steps:

[0018] The air pressure sensor of the acquisition module acquires the pressure in the air chamber of the damper body, and at the same time, the acceleration sensor of the acquisition module acquires the acceleration of the damper body and the structure connected to the damper body;

[0019] The control module of the controller acquires the pressure in the air chamber of the damper body, and the acceleration of the damper body and the structure;

[0020] The edge computing module of the controller calculates the target stiffness of the damper body based on the vibration states of the damper body and the structure;

[0021] The control module adjusts the pressure and volume of the implemented air chamber through the air pump and the electric valve based on the stiffness of the damper body, and adjusts the opening size of the through hole of the damping plate through the electric door panel so that the actual stiffness of the damper body conforms to the target stiffness.

[0022] The beneficial effects of the present invention are that the multi-stage adjustable air-liquid tuned mass damper of the present invention adopts a multi-stage adjustment mechanism to adjust the pressure and volume of the air chamber and intelligently control and adjust the state of the damping plate, and can realize the adjustment of the wide frequency and damping coefficient of the air-liquid damper, with a wide adjustment range and strong adaptability.

[0023] The multi-stage adjustable air-liquid tuned mass damper of the present invention adopts a self-adjustment mechanism, thereby achieving a better damping effect. It improves the working efficiency of the damper, reduces the workload, the system is more intelligent, and the application field is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more apparent:

[0025] Figure 1 It is a schematic structural diagram of the multi-stage adjustable air-liquid tuned mass damper according to an embodiment of the present invention.

[0026] Figure 2 It is a schematic structural diagram of the electric door panel according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following further describes the present application in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. In addition, it should be noted that, for the sake of description, only the parts related to the invention are shown in the drawings.

[0028] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0029] Referring to Figure 1 and Figure 2 As shown, the present invention provides a multi-stage adjustable air-liquid tuned mass damper, including: a damper body 1, an air pump 2, a collection module, and a controller. s

[0030] In this embodiment, the damper body 1 is arranged vertically. The damper body 1 is generally in a shape of a loop. An annular channel is formed in the damper body 1 and arranged in a circle along the circumferential direction of the damper body 1. The annular channel has two horizontal sections and two vertical sections. The vertical sections are connected to the ends of the two horizontal sections.

[0031] A partition membrane is provided in the two vertical sections of the annular channel. An air chamber is formed by enclosing the upper parts of the two partition membranes. A plurality of partition plates 14 are provided in the air chamber. The partition plates are arranged in the upper horizontal section. The plurality of partition plates 14 are arranged at intervals along the length direction of the air chamber (the upper horizontal section). An air bin a for gas perfusion is formed between two adjacent partition plates 14. An electric valve 11 is installed on the partition plate 14. The electric valve controls the connection or disconnection of two adjacent air bins.

[0032] As a preferred embodiment, the electric valve 11 is an electromagnetic valve.

[0033] A liquid chamber b for liquid perfusion is formed by enclosing the lower parts of the two partition membranes. Damping plates 12 are respectively provided at the opposite ends inside the liquid chamber b. The damping plates are arranged in the vertical section. Through holes 120 are formed on the damping plates 12. An electric door plate is installed on the damping plate 12. The electric door plate is used to control the opening size of the through holes 120.

[0034] The damper body 1 is provided with air holes communicating with the air chamber. An air inflation pump 2 is connected to the air holes. The air inflation pump is a high-pressure air pump, which adjusts the air pressure and volume of the air chamber by inflating or pumping air.

[0035] The acquisition module includes a barometric pressure sensor 21 and an acceleration sensor 22.

[0036] Among them, the barometric pressure sensor 21 is used to acquire the pressure in the air bin a. The acceleration sensor 22 is used to acquire the acceleration of the damper body 1 and the structure connected to the damper body 1 to display the vibration state of the damper body and the structure.

[0037] The controller includes a control module and an edge computing module connected to the control module.

[0038] The control module is connected to the electric valve 11, the electric door plate, the air inflation pump 2, the barometric pressure sensor 21 and the acceleration sensor 22.

[0039] The edge computing module calculates the target stiffness of the damper body 1 based on the vibration state of the damper body 1 and the structure. The control module adjusts the air pressure and volume of the air chamber through the air inflation pump 2 and the electric valve 11 based on the stiffness of the damper body 1, and adjusts the opening size of the through holes 120 of the damping plate 12 through the electric door plate to make the actual stiffness of the damper body 1 conform to the target stiffness.

[0040] Refer to Figure 2 As shown, the number of the through holes 120 on the damping plate is multiple. The through holes 120 are fan-shaped. The multiple through holes 120 are arranged at equal intervals along the circumferential direction of the damping plate 12.

[0041] The electric door plate includes: a fan-shaped plate 131, a rotating shaft 133 and a motor 132.

[0042] One end of the rotating shaft 133 is rotatably mounted on the damping plate 12. The other end of the rotating shaft extends to the outside of the damper body 1.

[0043] A plurality of sector plates 131. The number of sector plates is adapted to the number of through holes 120. The plurality of sector plates are connected to one end of the rotating shaft and are arranged at equal intervals along the circumferential direction of rotation. The sector plates are attached to the damping plate 12.

[0044] The motor 132 is drivingly connected to the other end of the rotating shaft. Preferably, the motor is a servo motor.

[0045] The motor drives the sector plates to open the area of the through holes on the damping plate from 50% to 75%.

[0046] Specifically, when the through holes of the damping plate and the sector plates do not coincide at all, at this time, the maximum opening area of the damping plate is 75% of the cross-section of the liquid chamber. On the contrary, when the motor drives the sector plates to rotate, the sector plates gradually cover the through holes of the damping plate, and the opening area of the through holes of the damping plate gradually decreases, and the minimum is 50% of the cross-section of the liquid chamber.

[0047] In this embodiment, in combination with Figure 1 As shown, the output shaft of the motor is coaxially connected to the other end of the rotating shaft.

[0048] The multi-stage adjustable gas-liquid tuned mass damper of the present invention, wherein the gas chamber is a closed space filled with gas. The liquid chamber stores liquid (such as oil, water, etc.). The damping plate and the electric door plate are used to change the frequency and damping coefficient of the gas-liquid tuned mass damper by controlling the opening size of the through holes on the damping plate. In addition, the connection or disconnection between the gas chambers is realized by opening or closing the electric valve, and the volume of the gas chamber is changed.

[0049] In this embodiment, the inflation pump changes the pressure of the gas chamber by inflating or deflating. The air pressure sensor monitors the air pressure change of the gas chamber to collect the pressure value. The acceleration sensor monitors the vibration state of the gas-liquid tuned mass damper and the structure connected to the gas-liquid tuned mass damper.

[0050] The edge computing module calculates and analyzes the data of the sensors obtained by the control module to obtain the required gas chamber pressure, volume and the state of the damping plate. The control module controls the inflation or deflation of the inflation pump, the opening or closing of the electric valve, and the rotation of the motor to adjust the state of the damping plate.

[0051] The present invention provides a design method for a multi-stage adjustable gas-liquid tuned mass damper, including the following steps:

[0052] S1. The air pressure sensor 21 of the acquisition module collects the pressure in the air chamber a of the damper body 1, and at the same time, the acceleration sensor 22 of the acquisition module collects the acceleration of the damper body 1 and the structure connected to the damper body 1.

[0053] S2. The control module of the controller obtains the pressure in the air chamber a of the damper body 1 and the accelerations of the damper body 1 and the structure.

[0054] S3. The edge computing module of the controller calculates and obtains the target stiffness of the damper body 1 based on the vibration states of the damper body 1 and the structure.

[0055] In this embodiment, when the vibration state of the structure exceeds the threshold, by adjusting the magnitude of the damping force of the damper, that is, based on the vibration state of the structure collected by the acceleration sensor, the pressure value that the air pump needs to pressurize, the number of electromagnetic valves opened, and the opening area of the through holes of the damping plate are calculated by the calculation module, and then the inflation pump is controlled by the control module to inflate and pressurize, the electromagnetic valve is opened, and the opening angle of the damping plate is reduced. Among them, adjusting the air pump and electromagnetic valve of the air chamber is to change the vibration frequency of the air-liquid damper, and adjusting the opening and closing area of the through holes of the damping plate is to change the magnitude of the damping force of the air-liquid damper.

[0056] S4. Based on the stiffness of the damper body 1, the control module adjusts the pressure and volume of the implemented air chamber through the inflation pump 2 and the electric valve 11, and adjusts the opening size of the through hole 120 of the damping plate 12 through the electric door panel so that the actual stiffness of the damper body 1 conforms to the target stiffness.

[0057] The multi-stage adjustable air-liquid tuned mass damper and its design method of the present invention monitor the vibration states of the air-liquid damper itself and the structure connected to the air-liquid damper through an acceleration sensor, including parameters such as vibration frequency and amplitude, with the goal of controlling the vibration state of the structure connected to the air-liquid damper, and then using the edge computing module to calculate the required adjusted air chamber pressure and volume and the state of the damping plate, so as to use the control module to control the inflation or deflation of the inflation pump, the opening or closing of the electric valve, and the state of the damping plate adjusted by the motor rotation (the opening area ranges from 50% to 75%).

[0058] The multi-stage adjustable air-liquid tuned mass damper of the present invention can achieve self-adjustment. When the vibration state or threshold of the structure connected to the air-liquid damper is clear, using the vibration state data collected by the acceleration sensor, the corresponding adjustment value is calculated by the edge computing module, so that the control module adjusts the damping characteristics of the air-liquid damper itself, realizing that the entire system is always in a safe operating mode.

[0059] The multi-stage adjustable air-liquid tuned mass damper of the present invention adopts a multi-stage adjustment mechanism to adjust the pressure and volume of the air chamber and the state of the damping plate by intelligent control, and can achieve wide frequency and damping coefficient adjustment of the air-liquid damper, with a wide adjustment range and strong adaptability.

[0060] The multi - stage adjustable gas - liquid tuned mass damper of the present invention uses multiple gas chambers, an air - charging pump, and a damping plate for multi - stage adjustment. It doesn't just refer to the gas chambers. In the control module, the size range of the structural vibration state corresponding to the value to be adjusted is preset first. When the vibration range of the actual structure is within a certain range, the control module will adjust the vibration frequency and damping force of the gas - liquid damper according to the corresponding relationship.

[0061] Specifically, the calculation of the damping force:

[0062] The damping force of the gas - liquid damper is mainly generated by the combined action of fluid resistance and gas pressure. The basic formula is:

[0063] F d = C·V + P g ·A e ;

[0064] F d : Total damping force (N);

[0065] C: Liquid damping coefficient (N·s / m), related to fluid viscosity and flow - channel geometric parameters;

[0066] V: The moving speed of the structure (m / s). Among them, the acceleration sensor measures the amplitude A and frequency f of the structure to obtain the relationship between acceleration a and time. Integrating the acceleration can obtain the speed V = ∫adt;

[0067] P g : Air - chamber pressure (Pa);

[0068] Ae: Pneumatic effective acting area (m 2 ), where the pneumatic effective acting area is the effective area where the gas pressure in the pneumatic system generates an equivalent acting force on a specific structure, that is, the equivalent area when the gas pressure is converted into an axial force in the actual mechanical structure. It may be different from the geometric area and needs to consider the influence of factors such as the structure shape and sealing method. In a U - tube gas - liquid damper, the pneumatic effective acting area is the net cross - sectional area of the air chamber.

[0069] Adjustment of the damping coefficient:

[0070] The liquid damping coefficient C is affected by the opening - closing angle θ of the damping plate and is achieved by adjusting the flow - channel cross - sectional area A(θ):

[0071]

[0072] ρ: Fluid density in the liquid chamber (kg / m 3 )

[0073] C d : Discharge coefficient (dimensionless)

[0074] A(θ): Effective flow area when the opening and closing angle is θ (m 2 )

[0075] Air chamber pressure, volume and frequency adjustment:

[0076] The vibration frequency f of the gas-liquid damper and the pressure P of the gas chamber g It is related to the volume V of the gas chamber and can be solved by combining the gas state equation with the kinetic equation:

[0077]

[0078] k e : Equivalent stiffness (N / m), and chamber pressure P g Related to the gas volume V (k e ∝P g ·A e / V)

[0079] m: mass of gas-liquid damper (kg);

[0080] C: Liquid damping coefficient (N·s / m).

[0081] The multi-stage adjustable gas-liquid tuned mass damper of the present invention adopts a self-adjusting mechanism to achieve a better damping effect, improve the working efficiency of the damper, reduce the workload, make the system more intelligent, and have a wider range of applications.

[0082] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A multi-stage adjustable gas-liquid tuned mass damper, characterized in that, Comprising: A damper body arranged vertically and in a loop shape, an annular channel is formed in the damper body and is arranged in a circle along the circumferential direction of the damper body. Partition membranes are provided in the two vertical sections of the annular channel. An air chamber is formed by enclosing between the upper parts of the two partition membranes. A plurality of partition plates are provided in the air chamber, and the plurality of partition plates are arranged at intervals along the length direction of the air chamber. An air storage chamber for filling gas is formed between two adjacent partition plates. Electric valves are installed on the partition plates. A liquid chamber for filling liquid is formed by enclosing between the lower parts of the two partition membranes. Damping plates are respectively provided at the opposite ends inside the liquid chamber. Through holes are formed on the damping plates, and electric door plates for controlling the opening size of the through holes are installed on the damping plates; An air pump, an air hole communicating with the air chamber is opened on the damper body, and the air pump is connected to the air hole; A collection module, including a barometric pressure sensor for collecting the pressure in the air storage chamber and an acceleration sensor for collecting the acceleration of the damper body and the structure connected to the damper body; A controller, including a control module and an edge computing module connected to the control module. The control module is connected to the electric valve, the electric door plate, the air pump, the barometric pressure sensor and the acceleration sensor. The edge computing module calculates and obtains the target stiffness of the damper body based on the vibration states of the damper body and the structure. The control module adjusts the pressure and volume of the air chamber through the air pump and the electric valve based on the stiffness of the damper body, and adjusts the opening size of the through hole of the damping plate through the electric door plate to make the actual stiffness of the damper body conform to the target stiffness.

2. The multi-stage adjustable gas-liquid tuned mass damper according to claim 1, wherein The number of the through holes is multiple, the through holes are fan-shaped, and the multiple through holes are arranged at equal intervals along the circumferential direction of the damping plate.

3. The multi-stage adjustable gas-liquid tuned mass damper according to claim 2, wherein The electric door plate includes: A rotating shaft, one end of the rotating shaft is rotatably installed on the damping plate, and the other end of the rotating shaft extends to the outside of the damper body; A plurality of fan-shaped plates, the number of the fan-shaped plates is adapted to the number of the through holes, the plurality of fan-shaped plates are connected to one end of the rotating shaft and are arranged at equal intervals along the circumferential direction of the rotation, and the fan-shaped plates are attached to the damping plate; A motor, which is drivingly connected to the other end of the rotating shaft.

4. The multi-stage adjustable gas-liquid tuned mass damper according to claim 3, wherein The output shaft of the motor is coaxially connected to the other end of the rotating shaft.

5. The multi-stage adjustable gas-liquid tuned mass damper according to claim 1, wherein The electric valve is an electromagnetic valve.

6. A design method of a multi-stage adjustable gas-liquid tuned mass damper according to any one of claims 1 to 5, characterized in that, Including the following steps: The barometric pressure sensor of the collection module collects the pressure in the air storage chamber of the damper body, and at the same time, the acceleration sensor of the collection module collects the acceleration of the damper body and the structure connected to the damper body; The control module of the controller obtains the pressure in the air storage chamber of the damper body and the acceleration of the damper body and the structure; The edge computing module of the controller calculates and obtains the target stiffness of the damper body based on the vibration states of the damper body and the structure; The control module adjusts the pressure and volume of the implemented air chamber through the air pump and the electric valve based on the stiffness of the damper body, and adjusts the opening size of the through hole of the damper plate through the electric door panel so that the actual stiffness of the damper body conforms to the target stiffness.

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