Tuned mass damper with health detection function

Abstract

The utility model provides a tuned mass damper with a health detection function. The tuned mass damper comprises a mass assembly; the elastic assembly is connected with the mass assembly; the guide assembly is used for fixing the moving direction of the mass assembly; the damping module is used for providing damping for the mass assembly; the detection module is used for detecting the vibration frequency of the mass assembly and the vibration frequency of an external object; the data processing module is used for determining the standard frequency of the mass assembly according to the vibration frequency, detected by the detection module, of the external object, determining the absolute value of the difference value between the detected frequency of the mass assembly and the standard frequency, and sending out an alarm signal when the ratio of the absolute value of the difference value and the standard frequency exceeds a threshold value.

Description

Technical Field

[0001] The utility model relates to the field of tuned mass dampers, in particular to a tuned mass damper with health monitoring function. Background Art

[0002] With the widespread construction of long-span bridges and the widespread use of high-efficiency bridge-building materials, the structural form of modern bridges has gradually developed towards large spans, lightness, and flexibility. Although this is beneficial in terms of aesthetics and economy, it also puts higher and more stringent requirements on structural design, construction, and even operation. Resonance occurs because the structure's own low natural frequency is close to the natural frequency of the environment. At this time, if vibration is not suppressed by damping, the following consequences may occur: (1) The structure cannot provide normal services, such as being unable to walk on the structure. (2) When resonance occurs, it may cause the building to collapse. (3) Fatigue cracks occur in the structure, which may eventually lead to the collapse of the building.

[0003] As vital lifeline projects, long-span bridges hold a crucial position in the political and economic spheres, necessitating exceptional attention to their safety. The increasing lightness and flexibility of modern bridge structures place significant strain on their wind and earthquake resistance. As spans continue to increase, wind-induced vibrations in bridge structures are becoming increasingly prominent, significantly impacting both their safety and the comfort of vehicles. Therefore, it is crucial to implement effective measures to control wind damage to bridges within acceptable limits. Utility Model Content

[0004] The utility model provides a tuned mass damper with health detection, which can remotely monitor the health status of the tuned mass damper, including:

[0005] quality components;

[0006] Elastic component, connected to the mass component

[0007] Guide assembly, used to fix the moving direction of the mass assembly

[0008] A damping module, used to provide damping to the mass component;

[0009] A detection module, used to detect the vibration frequency of the mass component and the vibration frequency of the external object;

[0010] The data processing module is used to determine the standard frequency of the mass component based on the vibration frequency of the external object detected by the detection module, and determine the absolute value of the difference between the detected frequency of the mass component and the standard frequency, and issue an alarm signal when the ratio of the absolute value of the difference to the standard frequency exceeds a threshold.

[0011] Optionally, the mass assembly includes a plurality of fixed mass blocks and a plurality of detachable mass blocks.

[0012] Optionally, the elastic component includes a plurality of elastic elements distributed at intervals, and the elastic elements are detachable.

[0013] Optionally, the elastic element is a compression spring.

[0014] Optionally, the damping module includes a viscous damper.

[0015] Optionally, the guide assembly includes a plurality of columns and linear bearings, the mass assembly is fixed to the linear bearings, and the columns pass through the linear bearings.

[0016] Optionally, the detection module includes a low-frequency piezoelectric acceleration sensor.

[0017] Optionally, the data processing module includes:

[0018] An AD converter, a first calculator and a second calculator, wherein the AD converter is used to convert the analog signal of the detection module into a digital signal and output the digital signal to the first calculator;

[0019] The first calculator calculates the standard frequency according to the output result of the AD converter, wherein the standard frequency = the frequency of the external object × the frequency parameter, wherein the frequency parameter is predetermined based on the array mass and the modal mass of the tuned mass damper, and the frequency parameter = 1 / (1+μ), where μ is the array mass and the modal mass of the tuned mass damper;

[0020] The second calculator calculates an absolute value of a difference between the frequency of the mass module and the standard frequency according to a standard frequency, and determines a ratio of the absolute value of the difference to the standard frequency;

[0021] A numerical comparator is used to compare the ratio with a threshold.

[0022] Optionally, the data processing module further includes a filtering unit, and the filtering unit is used to filter the signal detected by the detection component.

[0023] Optionally, the frequency threshold value ranges from 1% to 5%.

[0024] The technical solutions provided by the embodiments of the present disclosure have the following beneficial effects:

[0025] In an embodiment of the present disclosure, a tuned mass damper is provided, which includes a detection module and a data processing module. The detection module detects the frequencies of the mass module and the external object in real time, and transmits the detected frequency signal to the data processing module for processing. The data processing module processes the frequency signal through various chips to determine the standard frequency and the difference between the frequency of the mass module and the standard frequency, thereby realizing health monitoring of the tuned mass damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A schematic structural diagram of a tuned mass damper with health detection provided by an embodiment of the present disclosure;

[0028] Figure 2 This is a structural block diagram of a data processing module provided in an embodiment of the present disclosure.

[0029] The reference numerals are as follows:

[0030] 1: Quality components;

[0031] 2: elastic component;

[0032] 3: guide assembly; 31: column; 32: linear bearing;

[0033] 4: Damping module;

[0034] 5: Detection module;

[0035] 6: data processing module; 61: AD converter; 62: first calculator; 63: second calculator; 64: numerical comparator; 65: filter;

[0036] 7: Near base station;

[0037] 8: Main control center. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] A tuned mass damper (TMD), also known as a dynamic vibration absorber, primarily consists of a mass, a spring system, and a damping system. A TMD incorporates an auxiliary system into the main structure to transfer the vibration energy of the main structure to the auxiliary system, thereby dissipating energy and reducing vibrations of the main structure. The TMD adjusts the vibration frequency of the TMD system to near the dominant frequency of structural vibration. Through interaction between the TMD and the main structure, energy is transferred from the main structure to the TMD system, reducing vibrations of the main structure. Due to its clear principle and simple construction, it is widely used in structural vibration control, particularly for controlling vortex-induced vibrations caused by wind-induced vibrations in long-span bridges.

[0040] To ensure the bridge's wind resistance, driving comfort, and avoid any wind-induced vibration, a vibration control measure called Transmitted Damping Devices (TMDs) was proposed. TMDs are a crucial component of the bridge's wind resistance measures, and health monitoring is required to ensure that each TMD remains operational.

[0041] In response to the above-mentioned defects or improvement needs of the existing technology, the present invention provides a tuned mass damper with health monitoring. The TMD health monitoring system monitors the vibration and vibration reduction of the TMD by measuring the vibration size of the TMD mass block and the bridge itself, and monitors whether the TMD is working normally, providing valuable information for bridge structure maintenance and safety, improving the level of TMD maintenance and management of bridges in operation, establishing a bridge TMD health monitoring system, timely obtaining the vibration status of the bridge structure and the TMD working status (frequency, amplitude, damping ratio), and ensuring that it can identify whether the TMD is working normally.

[0042] Figure 1 This is a schematic diagram of the structure of a tuned mass damper with health detection provided by an embodiment of the present disclosure. Figure 1 , the tuned mass damper includes

[0043] Quality component 1;

[0044] Elastic component 2, connected to mass component 1;

[0045] A guide component 3, used to fix the moving direction of the mass component 1;

[0046] The damping module 4 is used to provide damping to the mass component 1;

[0047] Detection module 5, used to detect the vibration frequency of the mass component 1 and the vibration frequency of the external object;

[0048] The data processing module 6 is used to determine the standard frequency of the mass component 1 based on the vibration frequency of the external object detected by the detection module 5, and determine the absolute value of the difference between the detected frequency of the mass component 1 and the standard frequency, and issue an alarm signal when the ratio of the absolute value of the difference to the standard frequency exceeds a threshold.

[0049] In an embodiment of the present disclosure, a tuned mass damper is provided, which includes a detection module and a data processing module. The detection module detects the frequencies of the mass module and the external object in real time, and transmits the detected frequency signal to the data processing module for processing. The data processing module processes the frequency signal through various chips to determine the standard frequency and the difference between the frequency of the mass module and the standard frequency, thereby realizing health monitoring of the tuned mass damper.

[0050] In the embodiment of the present disclosure, the mass assembly 1 includes a plurality of fixed mass blocks and a plurality of detachable mass blocks.

[0051] In the embodiment of the present disclosure, providing a detachable mass block can facilitate adjusting the frequency of the tuned mass damper to reach a standard frequency by adjusting the number of mass blocks in the mass assembly.

[0052] In the embodiment of the present disclosure, the elastic component 2 includes a plurality of elastic elements distributed at intervals, and the elastic elements are detachable.

[0053] In an embodiment of the present disclosure, a detachable elastic element is provided to facilitate adjustment of the frequency of the tuned mass damper.

[0054] In the embodiment of the present disclosure, the elastic element is a compression spring, which is more conducive to tuning the mass of the mass damper.

[0055] In the embodiment of the present disclosure, the guide assembly 3 includes a plurality of columns 31 and linear bearings 32 , the mass assembly 1 is fixed to the linear bearings 32 , and the columns 31 pass through the linear bearings 32 .

[0056] In the embodiment of the present disclosure, the guide component is arranged in the above manner to ensure the guiding effect of the guide component.

[0057] In the embodiment of the present disclosure, the damping module 4 includes a viscous damper, which has a good damping effect.

[0058] In the embodiment of the present disclosure, the detection module 5 includes a low-frequency piezoelectric acceleration sensor. The low-frequency piezoelectric acceleration sensor has high detection accuracy, which is conducive to more accurate detection of the frequency of the tuned mass damper and the external object.

[0059] Figure 2 This is a structural block diagram of a data processing module provided by an embodiment of the present disclosure. Figure 2 , the data processing module 6 includes:

[0060] An AD converter 61 , a first calculator 62 and a second calculator 63 , wherein the AD converter 61 is used to convert the analog signal of the detection module 5 into a digital signal and output the digital signal to the first calculator 62 ;

[0061] The first calculator 62 calculates the standard frequency according to the output result of the AD converter 61, wherein the standard frequency = the frequency of the external object × the frequency parameter, wherein the frequency parameter is predetermined based on the array mass and the modal mass of the tuned mass damper, and the frequency parameter = 1 / (1+μ), wherein μ is the array mass and the modal mass of the tuned mass damper;

[0062] The second calculator 63 calculates an absolute value of a difference between the frequency of the mass module and the standard frequency according to the standard frequency, and determines a ratio of the absolute value of the difference to the standard frequency;

[0063] The numerical comparator 64 is used to compare the ratio with a threshold.

[0064] The first calculator 62 may include a multiplier chip, and the second calculator 63 may include a subtractor chip and a divider chip.

[0065] In the embodiment of the present disclosure, the ratio of the absolute value of the difference to the standard frequency is finally determined by the first calculator and the second calculator, so that the state of the tuned mass damper can be judged. When the frequency of the tuned mass damper does not meet the requirements, an alarm signal is issued.

[0066] In the embodiment of the present disclosure, the data processing module 6 further includes a filtering unit 65 , and the filtering unit 65 is configured to perform filtering processing on the signal detected by the detection component 5 .

[0067] In the embodiment of the present disclosure, filtering is performed on the signal detected by the detection component to improve the accuracy of the signal.

[0068] In the embodiment of the present disclosure, the frequency threshold value ranges from 1% to 5%.

[0069] Exemplarily, the frequency threshold is 3%.

[0070] In the embodiment of the present disclosure, the above frequency threshold is adopted to ensure that the tuned mass damper operates in a good state.

[0071] See again Figure 1 In the embodiment of the present disclosure, after determining the absolute value of the difference between the frequency of the detected mass component and the standard frequency, and the ratio of the absolute value of the difference to the standard frequency, the data processing module 6 will also transmit the ratio of the absolute value of the difference to the standard frequency to the adjacent base station 7. The adjacent base station 7 will transmit the ratio of the absolute value of the difference to the standard frequency to the main control center 8 to ensure that the user can detect the operating status of the tuned mass damper in real time.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A tuned mass damper with health detection, characterized in that: include: quality components; an elastic component connected to the mass component; A guide component, used to fix the moving direction of the mass component; A damping module, used to provide damping to the mass component; A detection module, used to detect the vibration frequency of the mass component and the vibration frequency of the external object; The data processing module is used to determine the standard frequency of the mass component based on the vibration frequency of the external object detected by the detection module, and determine the absolute value of the difference between the detected frequency of the mass component and the standard frequency, and issue an alarm signal when the ratio of the absolute value of the difference to the standard frequency exceeds a threshold.

2. A tuned mass damper with health detection according to claim 1, characterized in that: The mass assembly includes a plurality of fixed mass blocks and a plurality of detachable mass blocks.

3. The tuned mass damper with health detection according to claim 1, characterized in that: The elastic component includes a plurality of elastic elements distributed at intervals, and the elastic elements are detachable.

4. A tuned mass damper with health detection according to claim 3, characterized in that: The elastic element is a compression spring.

5. The tuned mass damper with health detection according to claim 1, characterized in that: The damping module includes a viscous damper.

6. A tuned mass damper with health detection according to claim 1, characterized in that: The guide assembly includes a plurality of columns and linear bearings, the mass assembly is fixed to the linear bearings, and the columns pass through the linear bearings.

7. The tuned mass damper with health detection according to claim 1, characterized in that: The detection module includes a low-frequency piezoelectric acceleration sensor.

8. The tuned mass damper with health detection according to claim 1, characterized in that: The data processing module includes: An AD converter, a first calculator and a second calculator, wherein the AD converter is used to convert the analog signal of the detection module into a digital signal and output the digital signal to the first calculator; The first calculator calculates the standard frequency according to the output result of the AD converter, wherein the standard frequency = the frequency of the external object × the frequency parameter, wherein the frequency parameter is predetermined based on the array mass and the modal mass of the tuned mass damper, and the frequency parameter = 1 / (1+μ), where μ is the array mass and the modal mass of the tuned mass damper; The second calculator calculates an absolute value of a difference between the frequency of the mass module and the standard frequency according to a standard frequency, and determines a ratio of the absolute value of the difference to the standard frequency; A numerical comparator is used to compare the ratio with a threshold.

9. A tuned mass damper with health detection according to claim 8, characterized in that: The data processing module further includes a filtering unit, which is used to perform filtering processing on the signal detected by the detection module.

10. The tuned mass damper with health detection according to claim 1, characterized in that: The frequency threshold value ranges from 1% to 5%.

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