Friction type stay cable damper and cable force monitoring method

Abstract

The application discloses a friction type cable-stayed cable damper and a cable force monitoring method, and the damper comprises a friction pair connecting steel plate, first clamping plates and second clamping plates arranged on the upper and lower sides of the friction pair connecting steel plate, a friction pair arranged between the first clamping plates and the second clamping plates and a clamping plate connecting plate; the friction pair is fixed with the friction pair connecting steel plate or the clamping plate connecting plate; the contact areas of the first clamping plates and the second clamping plates with the friction pair are provided with different roughnesses from outside to inside; the two clamping plates are fixed through a second clamping bolt; a bolt force sensor is arranged between the second clamping bolt and a nut; a displacement sensor is arranged on the clamping plate connecting plate; bolt pretightening force data collected by the bolt force sensor in real time and cable force data collected by the displacement sensor in real time are transmitted to a client through a data collector, and real-time dynamic monitoring of a working state of the damper is realized; there is no risk of oil leakage, the life cycle cost is low, and installation and maintenance are simple and convenient.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering technology, and more specifically, relates to a friction-type cable-stayed bridge damper and a method for monitoring cable force. Background Technology

[0002] With the continuous advancement of bridge science and technology, cross-river and cross-sea engineering projects are booming, and super-long-span cable-stayed bridges are springing up like mushrooms after rain. Since the Sutong Yangtze River Bridge successfully broke through the major technical bottleneck of span exceeding 1,000 meters, numerous 1,000-meter-class cable-stayed bridges are currently under construction. Cable-stayed bridges, with their unique structural advantages, occupy a pivotal position in modern bridge construction.

[0003] As the core component of cable-stayed bridges, stay cables are characterized by their low weight, high flexibility, and low damping. Under the influence of wind or other external excitation factors, stay cables are highly susceptible to strong vibrations. For long-span cable-stayed bridges, vibration control of stay cables has become one of the key challenges that must be overcome during the construction process.

[0004] Prolonged, large-amplitude vibrations in stay cables can lead to a series of serious consequences. First, the stress in the individual steel wires of the cable changes repeatedly due to vibration, making them highly susceptible to fatigue fracture. Second, the contact surfaces of the overlapping wires in the stay cable will slip relative to each other during vibration, resulting in various forms of fretting damage, such as fretting wear, fretting corrosion, and fretting fatigue. High-strength steel wires are typically very sensitive to fretting damage; once subjected to fretting damage, the fatigue life of the stay cable will decrease dramatically. Furthermore, large-amplitude vibrations in stay cables can cause repeated bending stresses at the anchorage ends, directly leading to rupture of the protective casing and fatigue failure of the rubber ring at the cable root. This reduces the sealing performance of the cable anchor head, significantly shortens the service life of the stay cable, and poses a significant threat to the safe operation of cable-stayed bridges.

[0005] Currently, vibration control of stay cables mainly relies on installing vibration dampers on the cables. Common types of dampers include viscous dampers, viscous shear dampers, magnetorheological dampers, and friction dampers. Among these dampers, viscous dampers have always been the mainstream choice in the field of stay cable vibration reduction.

[0006] However, viscous dampers are not without their flaws. Because their damping medium is liquid, there is a risk of oil leakage during actual use. This not only affects the damper's vibration reduction effect but may also pollute the surrounding environment. Furthermore, viscous dampers are difficult to maintain, requiring regular inspection and replacement of the damping medium, increasing bridge maintenance costs. Moreover, viscous dampers are relatively expensive, which is undoubtedly a heavy economic burden for large-scale cable-stayed bridge construction.

[0007] Therefore, there is an urgent need to develop a new type of cable-stayed cable damper that can effectively solve the defects of existing viscous dampers. Summary of the Invention

[0008] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a friction-type cable-stayed bridge damper and a cable force monitoring method. It dissipates energy through the friction of the friction pair, thereby achieving the function of cable-stayed bridge vibration reduction. Since the damping medium is solid, there is no risk of oil leakage, and subsequent maintenance only requires replacing the friction pair, greatly simplifying inspection and replacement. Furthermore, the initial installation cost and subsequent operating costs are significantly reduced. By incorporating displacement sensors, changes in cable force can be monitored intelligently in real time. Simultaneously, the roughness of different areas of the friction steel plate is used to achieve variable frictional resistance, reducing the damper's initial vibration load. Damping washers at the mounting bolt positions avoid the adverse effects of bolt hole gaps in conventional dampers, and spring washers ensure the stability of frictional resistance after wear of the friction pair. Sensors installed under the bolts can monitor the magnitude of frictional resistance in real time, providing reliable data support for the safe operation of bridges. This invention surpasses existing technologies in terms of cost control, safety assurance, ease of maintenance, intelligent monitoring accuracy, vibration reduction effect, and structural stability. It provides an efficient, economical, reliable, and intelligent innovative solution for cable-stayed bridge vibration control, and has significant application value.

[0009] To achieve the above objectives, one aspect of the present invention provides a friction-type cable-stayed bridge damper, wherein one end of the damper is connected to a cable clamp fitted onto a cable, and the other end is connected to a beam support located on the main beam; the damper includes a friction pair connecting steel plate for connection with the cable clamp, a first clamping plate and a second clamping plate disposed on the upper and lower sides of the friction pair connecting steel plate, and a friction pair and a clamping plate connecting plate disposed between the first clamping plate and the second clamping plate; wherein...

[0010] One end of the clamping plate is located between the first and second clamping plates, and the other end is connected to the beam support. The friction pair is fixed to the friction pair connecting steel plate or clamping plate connecting plate. The contact areas between the first and second clamping plates and the friction pair have different roughnesses from the outside to the inside to reduce the vibration load of the damper. The first and second clamping plates are fixed together by a number of second clamping bolts arranged at uniform intervals. A bolt force sensor is provided between the second clamping bolt and the nut. A displacement sensor is provided on the clamping plate connecting plate. The bolt force sensor and the displacement sensor are connected to a data acquisition unit. The bolt force sensor monitors the clamping force applied by the second clamping bolt to the friction pair in real time, thereby obtaining the magnitude of the frictional resistance generated by the sliding of the friction pair under the clamping force. The displacement sensor monitors the displacement change of the damper during vibration. The frequency of the frictional displacement change of the friction damper is used to intelligently monitor the cable force change of the stay cable in real time. The real-time monitoring data of the bolt force sensor and the displacement sensor is transmitted to the client through the data acquisition unit to realize the real-time dynamic monitoring of the cable force and the preload of the second clamping bolt.

[0011] Furthermore, spring washers are provided between the second clamping bolt and both the first and second clamping plates;

[0012] When the friction pair is fixed to the friction pair connecting steel plate, the first clamping plate, the clamping plate connecting plate, and the second clamping plate are fixed together by a through first clamping bolt.

[0013] When the friction pair is fixed to the clamping plate, the first clamping plate, the friction pair connecting steel plate, and the second clamping plate are fixed together by a through first clamping bolt.

[0014] Damping washers are provided at the positions where the first and second clamping plates contact the first clamping bolt;

[0015] When replacing the friction pair later, loosen the first clamping bolt and the second clamping bolt, separate the first clamping plate and the second clamping plate, take out the old friction pair, and install the new friction pair.

[0016] Furthermore, the damper employs an improved Coulomb damping model; the expression for the friction damping force of the damper is:

[0017]

[0018] In the formula: F d (t) represents the frictional damping force at time t;

[0019] F d Indicates the magnitude of frictional force; Indicates the speed of an object; It is a sign function, representing velocity. The symbol; when hour, when hour, k is a coefficient representing the relationship between damping force and friction; -k indicates that the direction of damping force is opposite to the direction of velocity.

[0020] Furthermore, the relationship between the vibration frequency of the stay cable (200) and the cable force is expressed by equation (2):

[0021]

[0022] Where T is the cable force, ρ is the linear mass density of the cable, L is the length of the cable, and f is the total mass of the cable. n Let n be the nth vibration frequency of the cable-stayed bridge, where n is the vibration order.

[0023] Furthermore, when the friction pair is fixed to the clamp connecting plate, two dampers are provided between the cable hoop and the top plate of the beam support; the two dampers are symmetrically arranged on the left and right sides of the center line connecting the cable hoop and the beam support; the dampers are detachably connected to both the cable hoop and the beam support.

[0024] Furthermore, one end of the friction pair is connected to the clamping plate, and a gap is left between the other end and the friction pair connecting steel plate;

[0025] The second clamping bolt is located in the mounting area of ​​the non-friction pair connecting steel plate and the non-friction pair moving area between the first clamping plate and the second clamping plate;

[0026] The friction pair connecting steel plate includes a first connecting ring for connecting with the cable hoop and a first connecting steel plate disposed on the first connecting ring; the first connecting ring and the connecting lug disposed on the cable hoop are connected by a first pin.

[0027] The clamping plate includes a U-shaped connecting lug for connecting with the beam support and a second connecting steel plate disposed on the U-shaped connecting lug;

[0028] Both the first connecting steel plate and the second connecting steel plate are located between the first clamping plate and the second clamping plate;

[0029] One end of the friction pair is connected to the second connecting steel plate, and the other end is separated from the first connecting steel plate by a gap.

[0030] Furthermore, when the friction pair is fixed to the friction pair connecting steel plate, the friction pair connecting steel plate includes a third connecting plate and a second connecting ring disposed at one end of the third connecting plate;

[0031] The third connecting plate and the second connecting ring are integrally formed and arranged, and both have the same thickness;

[0032] The friction pair is located inside the second connecting ring; the outer diameter of the friction pair is adapted to the inner diameter of the second connecting ring;

[0033] The second connecting ring is disposed between the first clamping plate and the second clamping plate; the height of the friction pair is greater than the thickness of the third connecting plate;

[0034] The height of the friction pair is adapted to the distance between the first clamping plate and the second clamping plate.

[0035] Furthermore, the second clamping bolt is located in the non-clamping plate connecting plate mounting area and the non-friction pair moving area between the first clamping plate and the second clamping plate.

[0036] Furthermore, when the friction pair is fixed to the clamping plate connecting plate, the clamping plate connecting plate includes a third connecting plate and a second connecting ring disposed at one end of the third connecting plate;

[0037] The third connecting plate and the second connecting ring are integrally formed and have the same thickness; the friction pair is located inside the second connecting ring; the outer diameter of the friction pair is adapted to the inner diameter of the second connecting ring.

[0038] The second connecting ring is disposed between the first clamping plate and the second clamping plate;

[0039] The height of the friction pair is greater than the thickness of the third connecting plate; the height of the friction pair is adapted to the distance between the first clamping plate and the second clamping plate.

[0040] A second aspect of the present invention provides a method for monitoring cable force in a friction-type cable-stayed bridge damper, which is implemented using the aforementioned friction-type cable-stayed bridge damper, and includes the following steps:

[0041] S1. Install dampers and sensors: Connect one end of the friction-type cable damper to the cable hoop fitted on the cable, and the other end to the beam support located on the main beam; install a bolt force sensor between the second clamping bolt and the nut of the damper, install a displacement sensor on the clamping plate connection plate, and connect the sensor to the data acquisition unit.

[0042] S2. Data Acquisition and Transmission: The bolt force sensor detects the clamping force applied by the second clamping bolt to the friction pair in real time and transmits it to the data acquisition unit; the displacement sensor monitors the displacement change of the damper during vibration, obtains the vibration displacement data of the damper, and transmits it to the data acquisition unit; the data acquisition unit collects the bolt clamping force monitoring data monitored by the bolt force sensor and the vibration displacement data of the damper monitored by the displacement sensor in real time and transmits them to the client.

[0043] S3. Data Analysis and Processing: Based on the clamping force measured by the bolt force sensor and the friction coefficient of the friction pair, and according to the improved Coulomb damping model used in the damper, the magnitude and direction of the friction damping force of the damper under different time and displacement conditions are calculated, and the variation law of the friction damping force of the damper during the vibration process is obtained.

[0044] The displacement data collected by the displacement sensor is processed by the data acquisition device to plot the dynamic displacement time history curve of the displacement changing with time. The vibration frequency of the cable is extracted from the dynamic displacement time history curve. According to the relationship formula between frequency and cable force, the real-time cable force of the cable is calculated and displayed on the client side, realizing real-time dynamic monitoring of the cable force.

[0045] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0046] (1) The present invention provides a friction-type cable-stayed bridge damper and a cable force monitoring method. The damper adopts a detachable connection, which eliminates the complex liquid medium storage and sealing device required by viscous dampers. The structure is simple and the manufacturing cost is greatly reduced. Later maintenance only requires the replacement of the worn friction pair, without the need to replace the liquid damping medium as required by viscous dampers. This simplifies the maintenance operation and reduces the cost over the entire life cycle. It has obvious economic advantages, especially for the construction of large-scale cable-stayed bridges.

[0047] (2) The friction-type cable-stayed bridge damper and cable force monitoring method of the present invention uses a solid friction pair as the damping medium, which completely eliminates the problem of reduced vibration reduction effect and environmental pollution caused by oil leakage of viscous dampers, and improves the safety and environmental protection of bridges; as a wear part, the friction pair is easy to replace, and there is no need for large-scale disassembly of the damper, which saves maintenance time and labor costs, improves maintenance efficiency, and ensures the normal operation of the bridge; the bolt force sensor can monitor the preload of the bolt in real time, which indirectly reflects the wear of the friction pair, making it easy to detect and replace worn parts in time, and achieve precise maintenance.

[0048] (3) The present invention provides a friction-type cable-stayed bridge damper and a cable force monitoring method. By monitoring the displacement change frequency of the damper through a displacement sensor and combining the relationship formula between vibration frequency and cable force, the cable force change of the cable-stayed bridge can be monitored in real time and intelligently, providing timely and accurate data support for the safe operation of the bridge. By monitoring the bolt clamping force in real time through a bolt force sensor and monitoring the displacement change of the damper through a displacement sensor, and transmitting the data to the client through a data acquisition device, the working status of the damper can be fully monitored, which helps to discover potential problems in advance.

[0049] (4) The present invention provides a friction-type cable-stayed bridge damper and monitoring method. By setting different roughnesses in different areas of the friction steel plate to achieve variable friction resistance, the damper’s starting load is reduced, making the damper easier to participate in vibration reduction and improving the control effect on cable-stayed bridge vibration. The improved Coulomb damping model can stably provide damping force opposite to the direction of motion, regardless of whether the displacement is small or large, efficiently dissipating vibration energy and forming a strong suppression effect on cable-stayed bridge vibration.

[0050] (5) The friction-type cable-stayed bridge damper and cable force monitoring method of the present invention, by setting damping washers at the installation bolt positions, effectively avoids the adverse effects of conventional damper bolt hole gaps during vibration, such as reducing structural loosening and stress concentration, and improves the structural stability of the damper. Spring washers are set between the bolts and the upper and lower clamping plates, ensuring that even with minor wear on the friction pair, the friction force does not decrease significantly, thereby automatically compensating for the wear gap of the friction pair, ensuring a constant bolt clamping force, and ensuring that the friction pair maintains stable frictional resistance after wear, avoiding the risk of damper failure due to friction pair wear. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the overall installation structure of a friction-type cable-stayed bridge damper according to Embodiment 1 of the present invention;

[0052] Figure 2 This is a schematic cross-sectional view of the overall installation structure of a friction-type cable-stayed bridge damper according to Embodiment 1 of the present invention;

[0053] Figure 3 This is a cross-sectional structural schematic diagram (first perspective) of a friction-type cable-stayed damper according to Embodiment 1 of the present invention;

[0054] Figure 4 This is a side view (second perspective) of a friction-type cable-stayed bridge damper according to Embodiment 1 of the present invention.

[0055] Figure 5 This is a schematic diagram of the sensor data acquisition process of a friction-type cable-stayed bridge damper according to Embodiment 1 of the present invention;

[0056] Figure 6 This is a schematic diagram of the mechanical model of a friction-type cable-stayed bridge damper according to Embodiment 1 of the present invention;

[0057] Figure 7 This is a schematic diagram of the real-time cable force acquisition process for a friction-type cable-stayed bridge damper according to Embodiment 1 of the present invention;

[0058] Figure 8 This is a schematic diagram of the vibration time history curve of a stay cable after installing a friction damper, according to Embodiment 1 of the present invention.

[0059] Figure 9 This is a schematic diagram of the vibration time history curve of a friction-type cable-stayed bridge without a damper installed, according to Embodiment 1 of the present invention.

[0060] Figure 10 This is a schematic diagram (first perspective) of the connection structure of the clamping plate and friction pair of a friction-type cable-stayed damper according to Embodiment 2 of the present invention.

[0061] Figure 11 This is a schematic diagram (second perspective) of the connection structure of the clamping plate and friction pair of a friction-type cable-stayed damper according to Embodiment 2 of the present invention.

[0062] Figure 12 This is a schematic diagram of the friction region of a friction-type cable-stayed bridge damper according to Embodiment 2 of the present invention;

[0063] Figure 13 This is a schematic diagram of the overall installation structure of a friction-type cable-stayed bridge damper according to Embodiment 3 of the present invention;

[0064] Figure 14 This is a schematic cross-sectional view of the overall installation structure of a friction-type cable-stayed bridge damper according to Embodiment 3 of the present invention;

[0065] Figure 15 This is a cross-sectional view of a friction-type cable-stayed bridge damper according to Embodiment 3 of the present invention;

[0066] Figure 16 This is a partially enlarged structural schematic diagram of a friction-type cable-stayed bridge damper according to Embodiment 3 of the present invention;

[0067] Figure 17 This is a schematic diagram of the friction pair connecting steel plate of a friction-type cable-stayed bridge damper according to Embodiment 3 of the present invention;

[0068] Figure 18 This is a schematic diagram of the friction region of a friction-type cable-stayed bridge damper according to Embodiment 3 of the present invention;

[0069] Figure 19 This is a schematic diagram of the overall installation structure of a friction-type cable-stayed bridge damper according to Embodiment 4 of the present invention;

[0070] Figure 20 This is a schematic cross-sectional view of the overall installation structure of a friction-type cable-stayed bridge damper according to Embodiment 4 of the present invention;

[0071] Figure 21 This is a schematic diagram of the cable force monitoring method for a friction-type cable-stayed bridge damper according to Embodiment 5 of the present invention.

[0072] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 100-damper, 101-friction pair connecting steel plate, 1011-first connecting ring, 1012-first connecting steel plate, 1013-third connecting plate, 1014-second connecting ring, 102-first clamping plate, 103-second clamping plate, 104-clamping plate connecting plate, 1041-U-shaped connecting lug, 1042-second connecting steel plate, 105-friction pair, 106-first clamping bolt, 107-second clamping bolt, 108-spring washer, 109-bolt force sensor, 110-displacement sensor, 111-damping washer, 200-stayed cable, 201-cable hoop, 300-beam support, 400-main beam, 500-data acquisition device. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0074] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, when an element is referred to as "fixed to," "set on," or "provided on" another element, it can be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to or indirectly connected to the other element. The terms "mounted," "connected," "linked," and "provided with" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0076] Example 1

[0077] like Figures 1-11As shown, Embodiment 1 of the present invention provides a friction-type cable-stayed bridge damper. One end of the damper 100 is connected to a cable clamp 201 fitted on the cable 200, and the other end is connected to a beam support 300 located on the main beam 400. The damper 100 includes a friction pair connecting steel plate 101 for connecting with the cable clamp 201, a first clamping plate 102 and a second clamping plate 103 disposed on the upper and lower sides of the friction pair connecting steel plate 101, a friction pair 105 disposed between the first clamping plate 102 and the second clamping plate 103, and a clamping plate connecting plate 104. One end of the clamping plate connecting plate 104 is provided with... Between the first clamping plate 102 and the second clamping plate 103, the other end is connected to the beam support 300, serving as a connection and force transmission mechanism; the friction pair 105 is fixed to the friction pair connecting steel plate 101 or the clamping plate connecting plate 104; the contact areas between the first clamping plate 102 and the second clamping plate 103 and the friction pair 105 have different roughnesses from the outside to the inside; the central area is relatively smooth, and the area away from the central area is relatively rough; by setting different roughnesses in different areas of the first clamping plate 102 and the second clamping plate 103, variable friction resistance is achieved, thereby reducing the vibration load of the damper; the first clamping plate The first clamping plate 102 and the second clamping plate 103 are fixed together by a plurality of second clamping bolts 107 arranged at even intervals; a bolt force sensor 109 is provided between the second clamping bolts 107 and the nut; a displacement sensor 110 is provided on the clamping plate connecting plate 104; the bolt force sensor 109 and the displacement sensor 110 are connected to the data acquisition unit 500; by placing the first clamping plate 102 and the second clamping plate 103 on the upper and lower sides of the friction pair connecting steel plate 101, a clamping structure for the friction pair 105 is formed; the bolt force sensor 109 monitors the second clamping bolts 107 in real time. The magnitude of the clamping force applied to the friction pair 105 is obtained, thereby obtaining the magnitude of the frictional resistance generated by the sliding of the friction pair under the action of the clamping force; by installing the displacement sensor 110 on the clamping plate connecting plate 104, the displacement change of the damper during the vibration process can be monitored, and the cable force change can be monitored in real time through the frequency of frictional displacement change of the friction damper; the real-time monitoring data of the bolt force sensor 109 and the displacement sensor 110 are transmitted to the client through the data acquisition unit 500, realizing real-time dynamic monitoring of the cable force of the stay cable and the preload of the second clamping bolt, providing data support for the safe operation of the bridge.

[0078] Furthermore, spring washers 108 are provided between the second clamping bolt 107 and the first clamping plate 102 and the second clamping plate 103 to ensure a constant clamping bolt force. Even if the friction pair wears, the bolt clamping force remains constant, thus preventing frictional failure after wear. When the friction pair 105 is fixed to the friction pair connecting steel plate 101, the first clamping plate 102, the clamping plate connecting plate 104, and the second clamping plate 103 are fixed together by a through first clamping bolt 106. The first clamping plate 102 and the second clamping plate 103 are fixed together with the first clamping bolt 106. A damping washer 111 is provided at the contact position of the tightening bolt 106 to avoid the adverse effects of gaps in the damper bolt holes. When the friction pair 105 is fixed to the clamping plate connecting plate 104, the first clamping plate 102, the friction pair connecting steel plate 101, and the second clamping plate 103 are fixed together by a through first clamping bolt 106. A damping washer 111 is provided at the contact position between the first clamping plate 102 and the second clamping plate 103 and the first clamping bolt 106 to reduce the influence of gaps in the bolt hole position and avoid frequent sliding between the upper and lower clamping plates and the connecting plate when the cable vibrates.

[0079] Furthermore, the damper 100 has an output port at each end; the cable clamp 201 is ring-shaped, fitted onto the stay cable 200, and connected to one end of the damper 100, its main function being to fix the damper 100 onto the stay cable 200; the beam support 300 is located on the main beam 400 and connected to the other end of the damper 100, serving to support the damper 100; the stay cable 200 runs through the entire cable clamp 201 and is a key component of the bridge, whose vibration needs to be controlled; the main beam 400, as the main load-bearing structure of the bridge, is connected to the beam support 300 and supports the entire damper system.

[0080] Furthermore, the friction areas of the first clamping plate 102 and the second clamping plate 103 are set with different roughnesses, which can achieve the effect of different friction coefficients in different areas. The central area is relatively smooth, which can reduce the slipping force of the friction pair, making the friction damper easier to slide and thus easier to participate in vibration reduction. The area far from the center is relatively rough, which can increase the damping force and play a greater role in vibration suppression. The first clamping plate 102 and the second clamping plate 103 apply clamping force to the friction pair 105 through multiple second clamping bolts 107. The clamping force can be sensed in real time by the bolt force sensor 109. The friction pair 105 will generate friction force when sliding under the action of clamping force, and then dissipate the energy of the vibration of the cable 200 through friction, thus playing a role in vibration reduction.

[0081] Furthermore, the damper 100 adopts a modified Coulomb damping model; due to the different roughness of the friction areas of the first clamping plate 102 and the second clamping plate 103, the friction damping force of the damper 100 changes during the sliding state, and the direction of motion is opposite to the direction of the cable velocity at the position of the friction damper. The expression for the friction damping force is:

[0082]

[0083] In the formula: F d (t) represents the frictional damping force at time t, whose magnitude and direction change with time; F d The magnitude of friction is one of the key factors affecting the magnitude of damping force; It represents the velocity of an object, reflecting how fast or slow the object moves, and its direction is an important factor affecting the direction of the damping force; It is a sign function, representing velocity. The symbol; when hour, when hour, It is used to determine the direction of the damping force, which is always opposite to the direction of motion; k is a coefficient representing the relationship between the damping force and the frictional force, -k indicates that the direction of the damping force is opposite to the direction of velocity; this formula represents the frictional damping force F. d (t) and frictional force F d and speed The sign of the friction force is related to its direction, which is opposite to the direction of velocity, and its magnitude is related to the magnitude of the friction force.

[0084] Figure 6 This is a mechanical model of the friction damper 100; it mainly demonstrates the friction damping force F. d The relationship between (t) and displacement u(x); the horizontal axis represents displacement u(x), reflecting the displacement change of the damper during vibration, with positive and negative values ​​representing displacements in opposite directions; the vertical axis represents the frictional damping force F. d (t) reflects the magnitude and direction of the damping force generated by the damper under different displacements; the figure shows that when the displacement is small, the frictional damping force F d (t) increases linearly with the increase of displacement u(x); when the displacement reaches a certain value, the damping force basically stays near a maximum value. That is, when the relative motion speed is small, the friction force is approximately proportional to the displacement; while when the speed is large, the friction force tends to saturate, approaching the maximum static friction force; F1 represents the friction damping force during the normal working stage. When the displacement is small, the damping force is roughly around this level and is proportional to the displacement. max It is the maximum damping force that the damper can provide when the displacement reaches its maximum value u. maxAt this point, the damping force reaches its maximum value; this indicates that the damper can generate the maximum energy dissipation capacity when the displacement is large, effectively suppressing vibration; u max This is the maximum displacement of the damper, indicating the damper's working capacity within the design-allowed displacement range; exceeding this displacement means that the damper has reached its limit state.

[0085] When the damper begins to vibrate and the displacement increases from 0, the damping force gradually increases in the opposite direction to the displacement (because the damping force always opposes motion), until it reaches F. max When the displacement reaches u max Afterwards, the damping force remains at F. max The friction damper continues to exert its maximum damping effect as the displacement decreases. When the displacement begins to decrease, the damping force also decreases, and its direction remains opposite to the direction of motion, until the displacement returns to 0. This figure clearly shows the variation law of the damping force of the friction damper under different displacements, reflecting its mechanical characteristics of dissipating energy and suppressing vibration through friction.

[0086] Furthermore, such as Figure 7 As shown, the displacement and force signals sensed by the displacement sensor 110 and the bolt force sensor 109 are collected by the data acquisition unit 500, processed, and transmitted to the customer's computer or handheld device, allowing real-time observation of the friction damper's operation. The displacement sensor 110 can sense the vibration displacement of the stay cable 200 in real time, and the vibration frequency of the stay cable 200 can be obtained from the dynamic displacement time history curve. Based on the relationship between frequency and cable force, the cable force of the stay cable 200 can be fed back in real time. Specifically, the displacement sensor 110 senses the vibration displacement of the stay cable 200 in real time, converts the displacement signal into an electrical signal, and transmits it to the data acquisition unit 500. This displacement data reflects the dynamic displacement change of the stay cable during vibration and is the basis for subsequent analysis of vibration frequency. The data acquisition unit 500 processes the displacement data collected by the displacement sensor 110 and plots the dynamic displacement time history curve of displacement over time, as shown in the figure. Figure 8 As shown; by performing signal processing methods such as spectrum analysis or vibration mode analysis on the curve, the vibration frequency characteristics of the cable 200 are extracted; the vibration frequency is an important dynamic parameter of the cable, and its magnitude is closely related to the cable force; using the extracted vibration frequency, the real-time cable force of the cable is calculated according to the formula relating frequency and cable force; the cable force calculation is expressed by equation (2):

[0087]

[0088] Where T is the cable force, ρ is the linear mass density of the cable, L is the length of the cable, and f is the total mass of the cable. nLet n be the nth order vibration frequency of the stay cable, where n is the vibration order (usually taken as the fundamental frequency, i.e., when n=1 for calculation); this formula reflects the quantitative relationship that the cable force is proportional to the square of the vibration frequency.

[0089] Figure 8 The vibration time history curve of the stay cable after the installation of the friction damper; Figure 9 The time history curve of the cable vibration without the damper shows that after installing the friction damper of the present invention, the vibration of the cable can be rapidly attenuated, which can achieve a good vibration suppression effect.

[0090] Furthermore, the friction pair 105 is made of highly wear-resistant material, with a wear rate of <30µm per kilometer; the damper 100 is equipped with a protective cover to ensure that the friction damper is not eroded by rainwater and wind and sand, thus improving its durability. When replacing the friction pair 105, simply loosen the first clamping bolt 106 and the second clamping bolt 107, separate the first clamping plate 102 and the second clamping plate 103, gently remove the old friction pair 105, and install the new friction pair 105; unlike viscous dampers, there is no need to replace the liquid damping medium, thus simplifying maintenance operations and reducing maintenance costs.

[0091] Example 2

[0092] like Figures 1-12 As shown, Embodiment 2 of the present invention provides a friction-type cable-stayed bridge damper, which differs from Embodiment 1 in that the friction pair 105 is fixed to the clamp connecting plate 104; two dampers 100 are provided between the cable clamp 201 and the top plate of the beam support 300; the two dampers 100 are symmetrically arranged on the left and right sides of the center line connecting the cable clamp 201 and the beam support 300; the dampers 100 are detachably connected to the cable clamp 201 and the beam support 300; and the existing viscous dampers can be easily replaced during later bridge maintenance.

[0093] Furthermore, one end of the friction pair 105 is connected to the clamping plate connecting plate 104, and a gap is left between the other end and the friction pair connecting steel plate 101; the first clamping plate 102, the friction pair connecting steel plate 101, and the second clamping plate 103 are fixed together by a through first clamping bolt 106 to ensure a tight connection and stability of the entire structure; the first clamping plate 102 and the second clamping plate 103 have the same structure and are arranged in parallel at intervals; the second clamping bolt 107 is located in the mounting area of ​​the non-friction pair connecting steel plate 101 and the moving area of ​​the non-friction pair 105 between the first clamping plate 102 and the second clamping plate 103; this uniform arrangement can ensure that the clamping force of the clamping plate on the friction pair is evenly distributed, avoiding This design avoids localized stress concentration, improving the stability and reliability of the entire structure. The friction pair 105 is located in the friction area between the first clamping plate 102 and the second clamping plate 103. The preload of the second clamping bolt 107 is monitored in real time by a bolt force sensor 109 installed on the second clamping bolt 107. The change in the preload of the second clamping bolt 107 can indirectly reflect the clamping force between the friction pair and the first clamping plate 102 and the second clamping plate 103, thus providing data support for monitoring cable force. The displacement change of the damper during vibration is monitored by a displacement sensor 110 installed on the clamping plate connecting plate 104. The cable force change of the stay cable is calculated using the data from the displacement sensor 110.

[0094] Further, the friction pair connecting steel plate 101 includes a first connecting ring 1011 for connecting with the cable clamp 201 and a first connecting steel plate 1012 disposed on the first connecting ring 1011; the first connecting ring 1011 and the connecting lug disposed on the cable clamp 201 are connected by a first pin; the clamp connecting plate 104 includes a U-shaped connecting lug 1041 for connecting with the beam support 300 and a second connecting steel plate 1042 disposed on the U-shaped connecting lug 1041; the U-shaped connecting lug 1041 and the beam support The fixed lugs on 300 are connected by a second pin; the first connecting steel plate 1012 and the second connecting steel plate 1042 are both located between the first clamping plate 102 and the second clamping plate 103; one end of the friction pair 105 is connected to the second connecting steel plate 1042, and the other end is separated from the first connecting steel plate 1012; this design allows the friction pair to function stably between the clamping plates, while the space provided provides room for the displacement monitoring of the damper, ensuring that the displacement sensor 110 can accurately monitor the displacement change of the damper.

[0095] Example 3

[0096] like Figures 13-18As shown, Embodiment 3 of the present invention provides a friction-type cable-stayed damper, which differs from Embodiment 1 in that the friction pair 105 is fixed to the friction pair connecting steel plate 101; the first clamping plate 102, the clamping plate connecting plate 104, and the second clamping plate 103 are fixed together by a through first clamping bolt 106; the friction pair connecting steel plate 101 includes a third connecting plate 1013 and a second connecting ring 1014 disposed at one end of the third connecting plate 1013; the third connecting plate 1013 and the second connecting ring 1014 are integrally formed and have the same thickness; the friction pair 105 is disposed inside the second connecting ring 1014; the outer diameter of the friction pair 105 is adapted to the inner diameter of the second connecting ring 1014; the second connecting ring 1014 is disposed between the first clamping plate 102 and the second clamping plate 103; the height of the friction pair 105 is greater than the thickness of the third connecting plate 1013; the height of the friction pair 105 is adapted to the distance between the first clamping plate 102 and the second clamping plate 103. The third connecting plate 1013 is fixedly or detachably connected to the cable hoop 201; the clamp connecting plate 104 is fixedly or detachably connected to the beam support 300; when detachably connected, the third connecting plate 1013 and the cable hoop 201 are respectively provided with connecting ears, and the connecting ears of the two are connected by a pin; the connecting parts of the clamp connecting plate 104 and the beam support 300 are respectively provided with connecting ears, and the connecting ears of the two are connected by a pin.

[0097] Furthermore, the second clamping bolt 107 is located in the mounting area of ​​the non-clamping plate connecting plate 104 and the non-friction pair 105 moving area between the first clamping plate 102 and the second clamping plate 103. This uniform arrangement ensures that the clamping force of the clamping plate on the friction pair is evenly distributed, avoiding local stress concentration and improving the stability and reliability of the entire structure. The friction pair 105 is located in the friction area between the first clamping plate 102 and the second clamping plate 103. The preload of the second clamping bolt 107 is monitored in real time by the bolt force sensor 109 on the second clamping bolt 107. The change in the preload of the second clamping bolt 107 can indirectly reflect the clamping force between the friction pair and the first clamping plate 102 and the second clamping plate 103, thereby providing data support for cable force monitoring. The displacement change of the damper during vibration is monitored by the displacement sensor 110 on the clamping plate connecting plate 104. The cable force change of the stay cable is calculated by the data from the displacement sensor 110.

[0098] Example 4

[0099] like Figures 19-20As shown, Embodiment 4 of the present invention provides a friction-type cable-stayed bridge damper, which differs from Embodiment 3 only in that the friction pair 105 is fixed to the clamping plate connecting plate 104; the clamping plate connecting plate 104 includes a third connecting plate 1013 and a second connecting ring 1014 disposed at one end of the third connecting plate 1013; the third connecting plate 1013 and the second connecting ring 1014 are integrally formed and have the same thickness; the friction pair 105 is disposed inside the second connecting ring 1014; the outer diameter of the friction pair 105 is adapted to the inner diameter of the second connecting ring 1014; the second connecting ring 1014 is disposed between the first clamping plate 102 and the second clamping plate 103; The height of the friction pair 105 is greater than the thickness of the third connecting plate 1013; the height of the friction pair 105 is adapted to the distance between the first clamping plate 102 and the second clamping plate 103; the third connecting plate 1013 is fixedly or detachably connected to the beam support 300; the friction pair connecting steel plate 101 is fixedly or detachably connected to the cable hoop 201; when detachably connected, the connection parts of the third connecting plate 1013 and the beam support 300 are respectively provided with connecting ears, and the connecting ears of the two are connected by a pin; the friction pair connecting steel plate 101 and the cable hoop 201 are respectively provided with connecting ears, and the connecting ears of the two are connected by a pin.

[0100] Example 5

[0101] like Figure 21 As shown, Embodiment 5 of the present invention provides a method for monitoring cable force in a friction-type cable-stayed bridge damper, comprising the following steps:

[0102] S1. Install dampers and sensors: Connect one end of the friction-type cable damper 100 to the cable clamp 201 fitted on the cable 200, and the other end to the beam support 300 located on the main beam 400, to ensure that the damper 100 is installed firmly and can effectively transmit force; install a bolt force sensor 109 between the second clamping bolt 107 and the nut of the damper 100, install a displacement sensor 110 on the clamping plate connecting plate 104, and connect the sensor to the data acquisition unit 500 to ensure the stability of signal transmission;

[0103] S2. Data Acquisition and Transmission: The clamping force applied by the second clamping bolt 107 to the friction pair 105 is sensed in real time by the bolt force sensor 109 and transmitted to the data acquisition unit 500; the clamping force data is used to understand the magnitude of the frictional resistance generated by the sliding of the friction pair 105 under the action of the clamping force, providing basic data for subsequent analysis of the working state of the damper and the change of cable force.

[0104] The displacement sensor 110 installed on the clamping plate 104 is used to monitor the displacement change of the damper 100 during the vibration process, obtain the vibration displacement data of the damper, and transmit it to the data acquisition unit 500; the vibration displacement data includes information such as the magnitude of the displacement and the frequency of change, which is then used to prepare for the calculation of the cable force of the cable.

[0105] The data acquisition unit 500 collects real-time bolt clamping force monitoring data monitored by bolt force sensor 109 and damper vibration displacement data monitored by displacement sensor 110, and transmits this data to the client, such as a computer or handheld device; the client can receive the damper's working data in real time, including changes in clamping force and displacement, so that staff can view and analyze it at any time.

[0106] S3. Data Analysis and Processing: Based on the clamping force measured by the bolt force sensor 109 and the friction coefficient of the friction pair 105, the magnitude and direction of the friction damping force of the damper under different times and displacements are calculated according to the improved Coulomb damping model adopted by the damper. The variation law of the friction damping force of the damper during the vibration process is obtained, and its effect on suppressing the vibration of the cable stay is understood.

[0107] The displacement data collected by the displacement sensor is processed by the data acquisition device to plot the dynamic displacement time history curve of displacement changing with time; the vibration frequency characteristics of the cable are extracted by signal processing methods such as spectrum analysis or vibration mode analysis on the curve to obtain the vibration frequency of the cable.

[0108] Using the extracted vibration frequency, the real-time cable force of the cable is calculated according to the formula relating the vibration frequency and cable force of the cable, and then displayed on the client side; this enables real-time dynamic monitoring of the cable force of the cable, providing data support for the safe operation of the bridge, so as to promptly detect abnormal changes in cable force and take corresponding measures to ensure bridge safety.

[0109] S4. Subsequent maintenance and evaluation of the damper: Based on long-term monitoring data, analyze the working performance of the damper, including the wear of the friction pair, the trend of damping force changes, and the stability of displacement monitoring data; determine whether the damper is working properly and whether there are any performance degradation problems, so as to provide a basis for the maintenance and replacement of the damper;

[0110] Regularly inspect and maintain the dampers. If problems such as severe wear of the friction pairs or sensor failure are found, repair or replace them in a timely manner to ensure the normal operation of the dampers and the accuracy of monitoring data; extend the service life of the dampers, ensure their effective control of cable vibration, and guarantee the safe operation of the bridge.

[0111] The friction-type cable-stayed bridge damper and cable force monitoring method provided by this invention dissipate energy through the friction of the friction pair, thereby achieving the function of cable-stayed bridge vibration reduction. Since the damping medium of the friction damper is solid, there is no risk of oil leakage, and subsequent maintenance only requires replacing the friction pair, which greatly simplifies inspection and replacement, and significantly reduces the initial installation cost and subsequent operating cost. By setting a displacement sensor, changes in cable force can be monitored intelligently in real time. At the same time, the roughness of different areas of the friction steel plate is used to achieve variable friction resistance, reducing the vibration load of the damper. The damping washers set at the mounting bolt positions avoid the adverse effects of bolt hole gaps in conventional dampers, and the spring washers ensure the stability of friction resistance after the friction pair wears. By setting a sensor under the bolt, the magnitude of friction resistance can be monitored in real time, providing reliable data support for the safe operation of bridges.

[0112] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A friction-type cable-stayed bridge damper, characterized in that: One end of the damper (100) is connected to a cable clamp (201) fitted onto the stay cable (200), and the other end is connected to a beam support (300) located on the main beam (400); the damper (100) includes a friction pair connecting steel plate (101) for connecting with the cable clamp (201), a first clamping plate (102) and a second clamping plate (103) disposed on the upper and lower sides of the friction pair connecting steel plate (101), a friction pair (105) and a clamping plate connecting plate (104) disposed between the first clamping plate (102) and the second clamping plate (103); wherein, One end of the clamping plate connecting plate (104) is located between the first clamping plate (102) and the second clamping plate (103), and the other end is connected to the beam support (300); the friction pair (105) is fixed to the friction pair connecting steel plate (101) or the clamping plate connecting plate (104); the contact area between the first clamping plate (102) and the second clamping plate (103) and the friction pair (105) is provided with different roughnesses from the outside to the inside, in order to reduce the vibration load of the damper; the first clamping plate (102) and the second clamping plate (103) are fixed by a plurality of second clamping bolts (107) arranged at uniform intervals; a bolt force sensor (109) is provided between the second clamping bolt (107) and the nut; a displacement sensor (110) is provided on the clamping plate connecting plate (104); the The bolt force sensor (109) and displacement sensor (110) are connected to the data acquisition unit (500). The bolt force sensor (109) monitors in real time the clamping force applied by the second clamping bolt (107) to the friction pair (105), thereby obtaining the magnitude of the frictional resistance generated by the sliding of the friction pair (105) under the action of the clamping force. The displacement sensor (110) monitors the displacement change of the damper (100) during the vibration process. The frequency of the frictional displacement change of the friction damper is used to monitor the cable force change of the cable (200) in real time. The data acquisition unit (500) transmits the real-time monitoring data of the bolt force sensor (109) and displacement sensor (110) to the client to realize the real-time dynamic monitoring of the cable force of the cable and the preload of the second clamping bolt.

2. The friction-type cable-stayed bridge damper according to claim 1, characterized in that: Spring washers (108) are provided between the second clamping bolt (107) and the first clamping plate (102) and the second clamping plate (103); When the friction pair (105) is fixed to the friction pair connecting steel plate (101), the first clamping plate (102), the clamping plate connecting plate (104), and the second clamping plate (103) are fixed together by a through first clamping bolt (106); When the friction pair (105) is fixed to the clamping plate connecting plate (104), the first clamping plate (102), the friction pair connecting steel plate (101), and the second clamping plate (103) are fixed together by a through first clamping bolt (106); Damping washers (111) are provided at the positions where the first clamping plate (102) and the second clamping plate (103) contact the first clamping bolt (106); When replacing the friction pair (105) later, loosen the first clamping bolt (106) and the second clamping bolt (107), separate the first clamping plate (102) and the second clamping plate (103), take out the old friction pair (105), and install the new friction pair (105).

3. The friction-type cable-stayed bridge damper according to claim 2, characterized in that: The damper (100) adopts an improved Coulomb damping model; the expression for the friction damping force of the damper (100) is: In the formula: F d (t) denotes the frictional damping force at time t. F d Indicates the magnitude of frictional force; Indicates the speed of an object; It is a sign function, representing velocity. The symbol; when hour, when hour, k is a coefficient representing the relationship between damping force and friction; -k indicates that the direction of damping force is opposite to the direction of velocity.

4. The friction-type cable-stayed bridge damper according to claim 3, characterized in that: The relationship between the vibration frequency of the stay cable (200) and the cable force is expressed by equation (2): Where T is the cable force, ρ is the linear mass density of the cable, L is the length of the cable, and f is the total mass of the cable. n Let n be the nth vibration frequency of the cable-stayed bridge, where n is the vibration order.

5. The friction-type cable-stayed bridge damper according to any one of claims 2-4, characterized in that: When the friction pair (105) is fixed to the clamp connecting plate (104), two dampers (100) are provided between the cable hoop (201) and the top plate of the beam support (300); the two dampers (100) are symmetrically arranged on the left and right sides of the center line connecting the cable hoop (201) and the beam support (300); the dampers (100) are detachably connected to the cable hoop (201) and the beam support (300).

6. The friction-type cable-stayed bridge damper according to claim 5, characterized in that: One end of the friction pair (105) is connected to the clamping plate (104), and the other end is separated from the friction pair connecting steel plate (101). The second clamping bolt (107) is located in the mounting area of ​​the non-friction pair connecting steel plate (101) and the moving area of ​​the non-friction pair (105) between the first clamping plate (102) and the second clamping plate (103); The friction pair connecting steel plate (101) includes a first connecting ring (1011) for connecting with the cable hoop (201) and a first connecting steel plate (1012) disposed on the first connecting ring (1011); the first connecting ring (1011) and the connecting lug disposed on the cable hoop (201) are connected by a first pin. The clamping plate (104) includes a U-shaped connecting lug (1041) for connecting with the beam support (300) and a second connecting steel plate (1042) disposed on the U-shaped connecting lug (1041); The first connecting steel plate (1012) and the second connecting steel plate (1042) are both located between the first clamping plate (102) and the second clamping plate (103); One end of the friction pair (105) is connected to the second connecting steel plate (1042), and the other end is spaced apart from the first connecting steel plate (1012).

7. The friction-type cable-stayed bridge damper according to any one of claims 2-4, characterized in that: When the friction pair (105) is fixed to the friction pair connecting steel plate (101), the friction pair connecting steel plate (101) includes a third connecting plate (1013) and a second connecting ring (1014) disposed at one end of the third connecting plate (1013); The third connecting plate (1013) and the second connecting ring (1014) are integrally formed and arranged, and the two have the same thickness; The friction pair (105) is disposed inside the second connecting ring (1014); the outer diameter of the friction pair (105) is adapted to the inner diameter of the second connecting ring (1014); The second connecting ring (1014) is disposed between the first clamping plate (102) and the second clamping plate (103); the height of the friction pair (105) is greater than the thickness of the third connecting plate (1013); The height of the friction pair (105) is adapted to the distance between the first clamping plate (102) and the second clamping plate (103).

8. The friction-type cable-stayed bridge damper according to claim 7, characterized in that: The second clamping bolt (107) is located in the mounting area of ​​the non-clamping plate connecting plate (104) and the moving area of ​​the non-friction pair (105) between the first clamping plate (102) and the second clamping plate (103).

9. The friction-type cable-stayed bridge damper according to any one of claims 2-4, characterized in that: When the friction pair (105) is fixed to the clamping plate (104), the clamping plate (104) includes a third connecting plate (1013) and a second connecting ring (1014) disposed at one end of the third connecting plate (1013); The third connecting plate (1013) and the second connecting ring (1014) are integrally formed and arranged, and the two have the same thickness; the friction pair (105) is disposed inside the second connecting ring (1014); the outer diameter of the friction pair (105) is adapted to the inner diameter of the second connecting ring (1014); The second connecting ring (1014) is disposed between the first clamping plate (102) and the second clamping plate (103); The height of the friction pair (105) is greater than the thickness of the third connecting plate (1013); the height of the friction pair (105) is adapted to the distance between the first clamping plate (102) and the second clamping plate (103).

10. A method for monitoring cable force in a friction-type cable-stayed bridge damper, characterized in that, The application of the friction-type cable-stayed bridge damper as described in any one of claims 1-9 includes the following steps: S1. Install the damper and sensor: Connect one end of the friction type cable damper (100) to the cable hoop (201) fitted on the cable (200), and the other end to the beam support (300) located on the main beam (400); install a bolt force sensor (109) between the second clamping bolt (107) and the nut of the damper (100), install a displacement sensor (110) on the clamping plate (104), and connect the sensor to the data acquisition unit (500); S2. Data Acquisition and Transmission: The clamping force applied by the second clamping bolt (107) to the friction pair (105) is sensed in real time by the bolt force sensor (109) and transmitted to the data acquisition unit (500); the displacement change of the damper (100) during vibration is monitored by the displacement sensor (110) to obtain the vibration displacement data of the damper and transmit it to the data acquisition unit (500); the data acquisition unit (500) collects the bolt clamping force monitoring data monitored by the bolt force sensor (109) and the vibration displacement data of the damper monitored by the displacement sensor (110) in real time and transmits it to the client. S3. Data Analysis and Processing: Based on the clamping force measured by the bolt force sensor (109) and the friction coefficient of the friction pair (105), according to the improved Coulomb damping model adopted by the damper, the magnitude and direction of the friction damping force of the damper under different time and displacement conditions are calculated, and the variation law of the friction damping force of the damper during the vibration process is obtained. The displacement data collected by the displacement sensor is processed by the data acquisition device to plot the dynamic displacement time history curve of the displacement changing with time. The vibration frequency of the cable is extracted from the dynamic displacement time history curve. According to the relationship formula between frequency and cable force, the real-time cable force of the cable is calculated and displayed on the client side, realizing real-time dynamic monitoring of the cable force.

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