Friction type stay cable damper and cable force monitoring method

Abstract

The invention discloses a friction type stay cable damper and a cable force monitoring method. The damper comprises a friction pair connecting steel plate, a first clamping plate, a second clamping plate, a friction pair and a clamping plate connecting plate, wherein the first clamping plate and the second clamping plate are arranged on the upper side and the lower side of the friction pair connecting steel 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 plate and the second clamping plate with the friction pair are provided with different roughness from outside to inside; the two clamping plates are fixed through a second clamping bolt; a bolt force transducer is arranged between the second clamping bolt and the nut; a displacement sensor is arranged on the clamping plate connecting plate; bolt pre-tightening force data collected by the bolt force measuring sensor in real time and stay cable force data collected by the displacement sensor in real time are transmitted to a client side through the data collector, and real-time dynamic monitoring of the working state of the damper is achieved. The oil leakage risk is avoided, the whole life cycle cost is low, and installation and maintenance are easy and convenient.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of bridge engineering, and more particularly relates to a friction type stay cable damper and a cable force monitoring method. BACKGROUND

[0002] With the continuous progress of bridge science and technology, cross-river and cross-sea projects are booming, and super-long-span cable-stayed bridges are emerging like mushrooms after the rain. Since the Sutong Changjiang River Bridge successfully broke through the technical bottleneck of a span of over 1,000 meters, many kilometer-level cable-stayed bridges are currently being built. Cable-stayed bridges occupy a pivotal position in modern bridge construction due to their unique structural advantages.

[0003] As the core component of a cable-stayed bridge, a stay cable has the characteristics of small self-weight, large flexibility, and small damping. Under the action of wind or other external excitation factors, the stay cable is prone to strong vibration. For a long-span cable-stayed bridge, the vibration control of the stay cable has become one of the key problems that must be overcome in the construction process of the cable-stayed bridge.

[0004] Long-term large-amplitude vibration of the stay cable will lead to a series of serious consequences. First, the stress of a single steel wire that makes up the stay cable will repeatedly change due to vibration, which makes the steel wire prone to fatigue fracture. Second, the contact surfaces of the mutually overlapping steel wires in the stay cable will produce relative sliding during the vibration process, thereby causing various forms of fretting damage such as fretting wear, fretting corrosion, and fretting fatigue of the steel wires. High-strength steel wires are usually very sensitive to fretting damage. Once subjected to fretting damage, the fatigue life of the stay cable will be drastically reduced. In addition, large-amplitude vibration of the stay cable will also cause repeated bending stress at the anchoring end of the stay cable, which will directly lead to rupture of the seal of the protective pipe and fatigue failure of the rubber ring at the root of the stay cable, thereby reducing the sealing performance of the cable anchor head and greatly shortening the service life of the stay cable, which brings great hidden dangers to the safe operation of the cable-stayed bridge.

[0005] At present, the vibration control of the stay cable mainly relies on the installation of a damping damper on the stay cable. Common types of dampers include viscous dampers, viscous shear type dampers, magnetorheological dampers, and friction dampers. Among these dampers, the viscous damper has always been the mainstream choice in the field of stay cable vibration reduction.

[0006] However, the viscous damper is not perfect. Since its damping medium is a liquid, there is a risk of oil leakage during actual use, which not only affects the vibration reduction effect of the damper, but also may cause pollution to the surrounding environment. At the same time, the maintenance work of the viscous damper is difficult, and the damping medium needs to be checked and replaced regularly, which increases the maintenance cost of the bridge. Moreover, the cost of the viscous damper is relatively high, which is undoubtedly a heavy economic burden for large-scale cable-stayed bridge construction.

[0007] Therefore, it is urgent to develop a new type of cable-stayed cable damper that can effectively solve the defects of the existing viscous damper. SUMMARY

[0008] In view of the above defects or improvement needs of the prior art, the present application provides a friction type cable-stayed cable damper and a cable force monitoring method. The damper relies on the friction of the friction pair to dissipate energy, thereby realizing the function of cable vibration reduction. Since the damping medium is solid, there is no risk of oil leakage, and the damper can be easily inspected and replaced by only replacing the friction pair, thereby greatly reducing the installation cost and the operation cost. By providing a displacement sensor, the cable force change can be monitored in real time and intelligently. The roughness of different regions of the friction steel plate is used to realize variable friction resistance, thereby reducing the vibration load of the damper. The damping washer is arranged at the position of the installation bolt to avoid the adverse effects of the bolt hole gap of the conventional damper. The spring washer is arranged to ensure the stability of the friction resistance after the wear of the friction pair. The sensor is arranged below the bolt to monitor the friction resistance in real time, thereby providing reliable data support for the safe operation of the bridge. The present application is superior to the prior art in terms of cost control, safety guarantee, maintenance convenience, intelligent monitoring accuracy, vibration reduction effect and structural stability, and provides an efficient, economical, reliable and intelligent innovative solution for the field of cable vibration control, and has significant application value.

[0009] In order to achieve the above-mentioned purpose, one aspect of the present application provides a friction type cable-stayed cable damper. One end of the damper is connected with a cable hoop wrapped on the cable-stayed cable, and the other end is connected with a beam bracket on the main beam. The damper comprises a friction pair connecting steel plate for connecting with the cable hoop, a first clamping plate and a second clamping plate arranged on the upper and lower sides of the friction pair connecting steel plate, and a friction pair and a clamping plate connecting plate arranged between the first clamping plate and the second clamping plate. Wherein,

[0010] The clamping plate connecting plate is arranged between the first clamping plate and the second clamping plate at one end and connected with the upper beam support at the other end; the friction pair is fixed with the friction pair connecting steel plate or the clamping plate connecting plate; the contact area of the first clamping plate and the second clamping plate with the friction pair is provided with different roughnesses from outside to inside, for reducing the vibration load of the damper; the first clamping plate and the second clamping plate are fixed through a plurality of second clamping bolts arranged at uniform intervals; the second clamping bolt and the nut are provided with a bolt force sensor; the clamping plate connecting plate is provided with a displacement sensor; the bolt force sensor and the displacement sensor are connected with a data collector; the bolt force sensor is used to monitor the clamping force of the second clamping bolt on the friction pair in real time, and then the friction resistance generated by the friction pair under the action of the clamping force is obtained; the displacement sensor is used to monitor the displacement change of the damper in the vibration process, and the cable force change of the cable-stayed cable is monitored in real time and intelligently through the friction displacement change frequency of the friction damper; the real-time monitoring data of the bolt force sensor and the displacement sensor are transmitted to the client through the data collector, so as to realize the real-time dynamic monitoring of the cable force of the cable-stayed cable and the pre-tightening force of the second clamping bolt.

[0011] Further, the second clamping bolt is provided with a spring washer between the first clamping plate and the second clamping plate;

[0012] When the friction pair is fixed with the friction pair connecting steel plate, the first clamping plate, the clamping plate connecting plate and the second clamping plate are fixed through the first clamping bolt penetrating through them;

[0013] When the friction pair is fixed with the clamping plate connecting plate, the first clamping plate, the friction pair connecting steel plate and the second clamping plate are fixed through the first clamping bolt penetrating through them;

[0014] The first clamping plate and the second clamping plate are provided with a damping washer at the position where they are in contact with the first clamping bolt;

[0015] When the friction pair is replaced in the later period, the first clamping bolt and the second clamping bolt are loosened, the first clamping plate and the second clamping plate are separated, the old friction pair is taken out, and a new friction pair is installed.

[0016] Further, the damper adopts an improved Coulomb damping model; and the expression of the friction damping force of the damper is:

[0017]

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

[0019] F d represents the size of the friction force; represents the speed of the object; is a symbol function, which represents the speed the symbol of the equation; when , when , k is a coefficient representing the relationship between the damping force and the friction force; -k indicates that the direction of the damping force is opposite to the direction of the velocity.

[0020] Further, the relationship between the vibration frequency of the cable-stayed cable (200) and the cable force is represented by equation (2):

[0021]

[0022] wherein T is the cable force of the cable-stayed cable, p is the mass linear density of the cable-stayed cable, L is the length of the cable-stayed cable, f n is the nth order vibration frequency of the cable-stayed cable, and n is the vibration order.

[0023] Further, when the friction pair is fixed with the clamping plate connecting plate, two dampers are arranged between the cable hoop and the top plate of the beam upper support; the two dampers are symmetrically arranged on the left and right sides of the center line between the cable hoop and the beam upper support; the dampers are detachably connected with the cable hoop and the beam upper support.

[0024] Further, one end of the friction pair is connected with the clamping plate connecting plate, and the other end is spaced apart from the friction pair connecting steel plate;

[0025] The second clamping bolt is arranged in the non-friction pair connecting steel plate mounting area and the non-friction pair movable area between the first clamping plate and the second clamping plate;

[0026] The friction pair connecting steel plate comprises a first connecting ring for connecting with the cable hoop and a first connecting steel plate arranged on the first connecting ring; the first connecting ring is connected with the connecting lug arranged on the cable hoop through a first pin shaft;

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

[0028] The first connecting steel plate and the second connecting steel plate are both arranged between the first clamping plate and the second clamping plate;

[0029] One end of the friction pair is connected with the second connecting steel plate, and the other end is spaced apart from the first connecting steel plate.

[0030] Further, when the friction pair is fixed with the friction pair connecting steel plate, the friction pair connecting steel plate comprises a third connecting plate and a second connecting ring arranged at one end of the third connecting plate;

[0031] The third connecting plate and the second connecting ring are integrally formed and have the same thickness.

[0032] The friction pair is arranged inside the second connecting ring, and the outer diameter of the friction pair is adapted to the inner diameter of the second connecting ring.

[0033] The second connecting ring is arranged between the first clamping plate and the second clamping plate, and 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 spacing between the first clamping plate and the second clamping plate.

[0035] Further, the second clamping bolt is arranged in a non-clamping plate connecting plate mounting area and a non-friction pair movable area between the first clamping plate and the second clamping plate.

[0036] Further, when the friction pair is fixed with the clamping plate connecting plate, the clamping plate connecting plate comprises a third connecting plate and a second connecting ring arranged 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 arranged inside the second connecting ring, and the outer diameter of the friction pair is adapted to the inner diameter of the second connecting ring.

[0038] The second connecting ring is arranged 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, and the height of the friction pair is adapted to the spacing between the first clamping plate and the second clamping plate.

[0040] The second aspect of the application provides a cable force monitoring method of a friction type stay cable damper, which is implemented by using the friction type stay cable damper and comprises the following steps:

[0041] S1, installing the damper and the sensor: one end of the friction type stay cable damper is connected with a cable hoop wrapped on the stay cable, and the other end is connected with a beam bracket on the main beam; a bolt force sensor is installed between the second clamping bolt and the nut of the damper, a displacement sensor is installed on the clamping plate connecting plate, and the sensors are connected with a data collector;

[0042] S2, data acquisition and transmission: the bolt force sensor senses the clamping force applied by the second clamping bolt to the friction pair in real time and transmits the clamping force to the data collector; the displacement sensor monitors the displacement change of the damper during vibration and obtains the vibration displacement data of the damper, and transmits the vibration displacement data to the data collector; the data collector 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 the data to the client.

[0043] S3, data analysis and processing: according to the clamping force measured by the bolt force sensor and the friction coefficient of the friction pair, the friction damping force size and direction of the damper under different time and displacement conditions are calculated according to the improved coulomb damping model adopted by the damper, and the friction damping force change rule of the damper in the vibration process is obtained;

[0044] The displacement data collected by the displacement sensor are processed by the data collector, and a dynamic displacement time history curve of displacement changing with time is drawn;According to the dynamic displacement time history curve, the vibration frequency of the cable-stayed cable is extracted, and the real-time cable force of the cable-stayed cable is calculated according to the relationship formula between frequency and cable force, and displayed on the client side, realizing real-time dynamic monitoring of the cable force of the cable-stayed cable.

[0045] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0046] (1) The friction type cable-stayed cable damper and cable force monitoring method of the present application, the damper adopts detachable connection, discards the complex liquid medium storage and sealing device required by the viscous damper, has simple structure and greatly reduces the manufacturing cost;The post-maintenance only needs to replace the worn friction pair, without replacing the liquid damping medium like the viscous damper, thereby simplifying the maintenance operation, reducing the life cycle cost, and having obvious economic advantages for large-scale cable-stayed bridge construction.

[0047] (2) The friction type cable-stayed cable damper and cable force monitoring method of the present application, the solid friction pair is used as the damping medium, which completely eliminates the problem of vibration reduction effect decline and environmental pollution caused by oil leakage of the viscous damper, improves the safety and environmental protection of the bridge;The friction pair as a consumable part is easy to replace, without large-scale disassembly of the damper, saving maintenance time and labor cost, improving maintenance efficiency and ensuring normal operation of the bridge;The bolt force sensor can monitor the pre-tightening force of the bolt in real time, indirectly reflecting the wear condition of the friction pair, facilitating timely discovery and replacement of worn parts, and realizing precise maintenance.

[0048] (3) The friction type cable-stayed cable damper and cable force monitoring method of the present application, the displacement sensor monitors the displacement change frequency of the damper, and the relationship formula between vibration frequency and cable force, which can realize real-time intelligent monitoring of the cable force change of the cable-stayed cable, and provide timely and accurate data support for safe operation of the bridge;The bolt force sensor monitors the bolt clamping force in real time, the displacement sensor monitors the displacement change of the damper, and the data collector transmits the data to the client, which can realize comprehensive monitoring of the working state of the damper, and help to find potential problems in advance.

[0049] (4) The friction type stay cable damper and monitoring method of the application realizes variable friction resistance by setting different roughness in different areas of the friction steel plate, reduces the vibration load of the damper, makes the damper more easily participate in vibration reduction, and improves the control effect on the vibration of the stay cable; the improved Coulomb damping model can stably provide damping force opposite to the movement direction under both small displacement and large displacement conditions, efficiently dissipates vibration energy, and has a strong inhibitory effect on the vibration of the stay cable.

[0050] (5) The friction type stay cable damper and cable force monitoring method of the application sets a damping washer at the position of the mounting bolt, effectively avoids the adverse effects caused by the gap of the bolt hole of the conventional damper during vibration, such as reducing structural looseness and stress concentration, and improves the structural stability of the damper. The spring washer is arranged between the bolt and the upper and lower clamping plates, so that the friction pair can still ensure that the friction force does not decrease greatly even if there is small wear, thereby automatically compensating for the wear gap of the friction pair, ensuring the constancy of the clamping force of the bolt, ensuring that the friction pair can still maintain stable friction resistance after wear, and avoiding the risk of damper failure caused by wear of the friction pair. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 It is a schematic diagram of the overall installation side view structure of the friction type stay cable damper of the embodiment 1 of the application.

[0052] Figure 2 It is a schematic diagram of the overall installation cross-sectional structure of the friction type stay cable damper of the embodiment 1 of the application.

[0053] Figure 3 It is a schematic diagram of the cross-sectional structure of the friction type stay cable damper of the embodiment 1 of the application (first view angle).

[0054] Figure 4 It is a schematic diagram of the side view structure of the friction type stay cable damper of the embodiment 1 of the application (second view angle).

[0055] Figure 5 It is a schematic diagram of the sensor data acquisition process of the friction type stay cable damper of the embodiment 1 of the application.

[0056] Figure 6 It is a schematic diagram of the mechanical model of the friction type stay cable damper of the embodiment 1 of the application.

[0057] Figure 7 It is a schematic diagram of the real-time cable force acquisition process of the friction type stay cable damper of the embodiment 1 of the application.

[0058] Figure 8 It is a schematic diagram of the stay cable vibration time history curve of the friction type stay cable damper of the embodiment 1 of the application after the friction damper is installed.

[0059] Figure 9 Figure 1 is a time history curve of a cable without a damper when a friction type cable damper of embodiment 1 of the present application is installed;

[0060] Figure 10 Figure 2 is a connection structure diagram of a clamping plate connecting plate and a friction pair of a friction type cable damper of embodiment 2 of the present application (first perspective view);

[0061] Figure 11 Figure 2 is a connection structure diagram of a clamping plate connecting plate and a friction pair of a friction type cable damper of embodiment 2 of the present application (second perspective view);

[0062] Figure 12 Figure 3 is a friction area diagram of a friction type cable damper of embodiment 2 of the present application;

[0063] Figure 13 Figure 4 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 3 of the present application;

[0064] Figure 14 Figure 4 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 3 of the present application;

[0065] Figure 15 Figure 4 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 3 of the present application;

[0066] Figure 16 Figure 4 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 3 of the present application;

[0067] Figure 17 Figure 4 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 3 of the present application;

[0068] Figure 18 Figure 4 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 3 of the present application;

[0069] Figure 19 Figure 5 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 4 of the present application;

[0070] Figure 20 Figure 5 is a schematic diagram of the overall installation side view structure of a friction type cable damper of embodiment 4 of the present application;

[0071] Figure 21 Figure 6 is a flowchart of a cable force monitoring method of a friction type cable damper of embodiment 5 of the present application.

[0072] In all the drawings, the same reference signs refer to the same technical features, in particular: 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 load cell, 110 - displacement sensor, 111 - damping washer, 200 - cable-stayed cable, 201 - cable clamp, 300 - beam upper support, 400 - main beam, 500 - data collector. DETAILED DESCRIPTION

[0073] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0074] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, when an element is referred to as "fixed to", "provided on" or "provided in" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element; the terms "mounting", "connection", "connection", "provided with" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0075] In addition, the terms "first", "second" and the like are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0076] Example 1

[0077] As Figures 1-11As shown, the embodiment 1 of the present application provides a friction type cable-stayed cable damper, one end of the damper 100 is connected with the cable hoop 201 sleeved on the cable-stayed cable 200, and the other end is connected with the beam bracket 300 on the main beam 400; the damper 100 comprises a friction pair connecting steel plate 101 for connecting with the cable hoop 201, a first clamping plate 102 and a second clamping plate 103 arranged 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 arranged between the first clamping plate 102 and the second clamping plate 103; one end of the clamping plate connecting plate 104 is arranged between the first clamping plate 102 and the second clamping plate 103, and the other end is connected with the beam bracket 300, which plays a role of connecting and transmitting force; the friction pair 105 is fixed with the friction pair connecting steel plate 101 or the clamping plate connecting plate 104; the contact area of the first clamping plate 102 and the second clamping plate 103 with the friction pair 105 is provided with different roughnesses from outside to inside; the central area is relatively smooth, and the area away from the central area is relatively rough; the variable friction resistance is realized by arranging different roughnesses in different areas of the first clamping plate 102 and the second clamping plate 103, so as to reduce the vibration load of the damper; the first clamping plate 102 and the second clamping plate 103 are fixed through a plurality of second clamping bolts 107 arranged at uniform intervals; the bolt force sensor 109 is arranged between the second clamping bolt 107 and the nut; the displacement sensor 110 is arranged on the clamping plate connecting plate 104; the bolt force sensor 109 and the displacement sensor 110 are connected with the data collector 500; the first clamping plate 102 and the second clamping plate 103 are arranged on the upper and lower sides of the friction pair connecting steel plate 101, forming a clamping structure for the friction pair 105; the bolt force sensor 109 is used to monitor the clamping force of the second clamping bolt 107 on the friction pair 105 in real time, and then the friction resistance generated by the sliding of the friction pair under the action of the clamping force is obtained; the displacement sensor 110 is installed on the clamping plate connecting plate 104, which can monitor the displacement change of the damper in the vibration process, and the friction displacement change frequency of the friction damper is used to monitor the cable force in real time; the real-time monitoring data of the bolt force sensor 109 and the displacement sensor 110 are transmitted to the client through the data collector 500, so as to realize the real-time dynamic monitoring of the cable force and the pre-tightening force of the second clamping bolt, and provide data support for the safe operation of the bridge.

[0078] Further, the second clamping bolt 107 is provided with spring washers 108 between the first clamping plate 102 and the second clamping plate 103, which can ensure the constant clamping force of the bolt, even if the friction pair wears out, the bolt clamping force can be kept constant, that is, the friction resistance failure condition after the friction pair wears out; when the friction pair 105 is fixed with 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 through the first clamping bolt 106; the damping washer 111 is arranged at the position where the first clamping plate 102 and the second clamping plate 103 contact with the first clamping bolt 106, which can avoid the adverse effects of the gap of the damper bolt hole; when the friction pair 105 is fixed with 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 through the first clamping bolt 106; the damping washer 111 is arranged at the position where the first clamping plate 102 and the second clamping plate 103 contact with the first clamping bolt 106, which can reduce the influence of the gap of the bolt hole position and avoid frequent sliding between the upper and lower clamping plates and the connecting plate when the cable vibrates.

[0079] Further, the damper 100 is provided with an output port at each end; the cable hoop 201 is annular, is sleeved on the cable 200 and is connected with one end of the damper 100, and mainly functions to fix the damper 100 on the cable 200; the beam upper support 300 is located on the main beam 400 and is connected with the other end of the damper 100, and functions to support the damper 100; the cable 200 penetrates through the entire cable hoop 201 and is a key component of the bridge, and the vibration thereof needs to be controlled; the main beam 400 is the main bearing structure of the bridge and is connected with the beam upper support 300 and supports the entire damper system.

[0080] Further, the friction regions of the first clamping plate 102 and the second clamping plate 103 are provided with different roughnesses, which can achieve the effect of different friction coefficients in different regions, the central region is relatively smooth, which can reduce the sliding force of the friction pair and make the friction damper more easily slide and further more easily participate in damping; the region away from the central region is relatively rough, which can increase the damping force and play a greater vibration suppression effect; the first clamping plate 102 and the second clamping plate 103 apply clamping force to the friction pair 105 through a plurality of second clamping bolts 207, the clamping force can be sensed in real time through the bolt force sensor 109, the friction pair 105 slides under the action of the clamping force to generate friction force, and further dissipate the vibration energy of the cable 200 through friction to play a damping effect.

[0081] Further, the damper 100 adopts an improved Coulomb damping model; due to the different roughness of the friction area of the first and second clamping plates 102 and 103, the friction damping force of the damper 100 is variable in the sliding state, the motion direction is opposite to the velocity direction of the cable at the position of the friction damper, and the friction damping force is expressed as:

[0082]

[0083] F (t) = F (t) · sign (v (t) ) · k d (t) represents the friction damping force at time t, which varies with time; F d represents the size of the friction force, which is one of the key factors affecting the size of the damping force; represents the velocity of the object, which reflects the speed of the object and the direction, which is an important factor affecting the direction of the damping force; is a sign function, which represents the sign of the velocity ; when , when , it is used to determine the direction of the damping force, and the damping force is always opposite to the motion direction; k is a coefficient, representing the relationship between the damping force and the friction force, and -k represents that the direction of the damping force is opposite to the velocity direction; the formula indicates that the friction damping force F d (t) is related to the friction force F d and the sign of the velocity , the direction is opposite to the velocity direction, and the size is related to the size of the friction force;

[0084] Figure 6 is the mechanical model of the friction damper 100; mainly shows the relationship between the friction damping force F d (t) and the displacement u(x); the horizontal axis represents the displacement u(x), which reflects the displacement change of the damper in the vibration process, and the positive and negative values represent the displacement in two opposite directions; the vertical axis represents the friction damping force F d (t), which reflects the damping force size and direction generated by the damper at different displacements; it is shown in the figure that when the displacement is small, the friction damping force F d (t) increases linearly with the increase of the displacement u(x); when the displacement reaches a certain value, the damping force basically remains near a maximum value. That is, when the relative motion velocity is small, the friction force is approximately proportional to the displacement; when the velocity is large, the friction force tends to be saturated and approaches the maximum static friction force; F1 represents the friction damping force in the normal working stage, and when the displacement is small, the damping force is approximately proportional to the displacement near this level; F max is the maximum damping force that the damper can provide, and when the displacement reaches the maximum value u maxWhen the displacement reaches this maximum value, the damping force reaches this maximum value; this indicates that the damper can produce the maximum energy dissipation capacity when the displacement is large, effectively suppressing vibration; u max is the maximum displacement of the damper, indicating the working capacity of the damper within the displacement range allowed by the design; exceeding this displacement means that the damper has reached the limit state;

[0085] When the damper starts to vibrate, the displacement increases from 0, and the damping force gradually increases in the opposite direction of the displacement (because the damping force always hinders movement) until it reaches F max ; when the displacement reaches u max , the damping force remains around F max , continuing to exert the maximum damping effect; when the displacement begins to decrease, the damping force also decreases in the opposite direction of the movement until the displacement returns to 0; this figure clearly shows the change rule of the damping force of the friction damper at different displacements, embodying its mechanical properties of dissipating energy and suppressing vibration through friction.

[0086] Further, as shown in Figure 7 , the displacement and force signals perceived by the displacement sensor 110 and the bolt force sensor 109 are collected by the data collector 500, transmitted to the customer's computer or handheld device after processing, and the working condition of the friction damper can be observed in real time; the displacement sensor 110 can perceive the vibration displacement of the cable-stayed cable 200 in real time, and the vibration frequency of the cable-stayed cable 200 can be obtained from the dynamic displacement time history curve; according to the relationship between frequency and cable force, the cable force of the cable-stayed cable 200 can be fed back in real time; specifically, the displacement sensor 110 perceives the vibration displacement of the cable-stayed cable 200 in real time, converts the displacement signal into an electrical signal and transmits it to the data collector 500; these displacement data reflect the dynamic displacement change of the cable-stayed cable during vibration, and are the basis for subsequent analysis of vibration frequency; the data collector 500 processes the displacement data collected by the displacement sensor 110, and draws a dynamic displacement time history curve of displacement versus time, as shown in Figure 8 ; by using signal processing methods such as frequency spectrum analysis or vibration modal analysis on the curve, the vibration frequency characteristics of the cable-stayed cable 200 are extracted; the vibration frequency is an important dynamic parameter of the cable-stayed cable, and its size is closely related to the cable force of the cable-stayed cable; using the extracted vibration frequency, the real-time cable force of the cable-stayed cable is calculated according to the relationship formula between frequency and cable force; the cable force calculation is represented by formula (2):

[0087]

[0088] where T is the cable force of the cable-stayed cable, p is the mass linear density of the cable-stayed cable, L is the length of the cable-stayed cable, and f 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] Further, one end of the friction pair 105 is connected with the clamping plate connecting plate 104, and the other end is spaced from 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 by the first clamping bolt 106 penetrating through, for ensuring the close connection and stability of the whole structure; the first clamping plate 102 and the second clamping plate 103 are the same structure and are arranged in parallel and spaced; the second clamping bolt 107 is arranged in the non-friction pair connecting steel plate 101 mounting area and the non-friction pair 105 active area 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 uniformly distributed, avoiding local stress concentration, and improving the stability and reliability of the whole structure; the friction pair 105 is located in the friction area between the first clamping plate 102 and the second clamping plate 103; the pre-tightening force of the second clamping bolt 107 is monitored in real time by the bolt load cell 109 arranged on the second clamping bolt 107, and the clamping force condition between the friction pair and the first clamping plate 102 and the second clamping plate 103 can be indirectly reflected by the change of the pre-tightening force of the second clamping bolt 107, thereby providing data support for the monitoring of the cable force; the displacement change of the damper in the vibration process is monitored by the displacement sensor 110 arranged on the clamping plate connecting plate 104, and the change of the cable force of the cable-stayed cable is calculated by the data of the displacement sensor 110.

[0094] Further, 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 arranged on the first connecting ring 1011; the first connecting ring 1011 is connected with the connecting lug arranged on the cable hoop 201 through a first pin shaft; the clamping plate connecting plate 104 includes a U-shaped connecting lug 1041 for connecting with the beam upper support 300, a second connecting steel plate 1042 arranged on the U-shaped connecting lug 1041; the U-shaped connecting lug 1041 is connected with the fixed lug on the beam upper support 300 through a second pin shaft; 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 with the second connecting steel plate 1042, and the other end is spaced from the first connecting steel plate 1012; this design enables the friction pair to stably function between the clamping plates, while the space left provides space for the displacement monitoring of the damper, ensuring that the displacement sensor 110 can accurately monitor the displacement change of the damper.

[0095] Embodiment 3

[0096] As Figures 13-18As shown, embodiment 3 of the present application provides a friction type stay cable damper, which is different from embodiment 1 in that the friction pair 105 is fixed with the friction pair connecting steel plate 101; the first clamping plate 102, the clamping plate connecting plate 104, the second clamping plate 103 are fixed through the first clamping bolt 106 penetrating through; the friction pair connecting steel plate 101 comprises a third connecting plate 1013 and a second connecting ring 1014 arranged at one end of the third connecting plate 1013; the third connecting plate 1013 and the second connecting ring 1014 are arranged in one piece and have the same thickness; the friction pair 105 is arranged inside the second connecting ring 1014; the outer diameter of the friction pair 105 is matched with the inner diameter of the second connecting ring 1014; the second connecting ring 1014 is arranged 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 matched with the spacing between the first clamping plate 102 and the second clamping plate 103. The third connecting plate 1013 is fixed or detachably connected with the cable hoop 201; the clamping plate connecting plate 104 is fixed or detachably connected with the beam upper support 300; when detachable connection, the third connecting plate 1013 and the cable hoop 201 are respectively provided with connecting ears, and the connecting ears are connected through a pin shaft; the connecting parts of the clamping plate connecting plate 104 and the beam upper support 300 are respectively provided with connecting ears, and the connecting ears are connected through a pin shaft.

[0097] Further, the second clamping bolt 107 is arranged in the non-clamping plate connecting plate 104 mounting area and the non-friction pair 105 active area 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 uniformly distributed, avoid local stress concentration, and improve the stability and reliability of the whole structure; the friction pair 105 is located in the friction area between the first clamping plate 102 and the second clamping plate 103; the pre-tightening force of the second clamping bolt 107 is monitored in real time through the bolt force sensor 109 arranged on the second clamping bolt 107, and the clamping force condition between the friction pair and the first clamping plate 102 and the second clamping plate 103 can be indirectly reflected through the change of the pre-tightening force of the second clamping bolt 107, thereby providing data support for the monitoring of the cable force; the displacement change of the damper in the vibration process is monitored through the displacement sensor 110 arranged on the clamping plate connecting plate 104, and the cable force change of the stay cable is calculated through the data of the displacement sensor 110.

[0098] Embodiment 4

[0099] As 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 207 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 207 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 connecting plate 104 is used to monitor the displacement change of the damper 100 during vibration, obtain the vibration displacement data of the damper, and transmit the data to the data collector 500; the vibration displacement data includes the size and change frequency of the displacement, and the like, and further prepares for the calculation of the cable force;

[0105] 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 are collected by the data collector 500 in real time, and these data are transmitted to the client, such as a computer or a handheld device, etc.; the client can receive the working data of the damper in real time, including the clamping force and the displacement change, so that the staff can check and analyze at any time;

[0106] S3, data analysis and processing: according to the clamping force measured by the bolt force sensor 109 and the friction coefficient of the friction pair 105 and the like, the friction damping force size and direction of the damper at different times and displacements are calculated according to the improved Coulomb damping model adopted by the damper, the friction damping force change rule of the damper in the vibration process is obtained, and the inhibition effect of the damper on the vibration of the cable-stayed cable is understood;

[0107] The displacement data collected by the displacement sensor are processed by the data collector, and a dynamic displacement time history curve of displacement changing with time is drawn; the vibration frequency characteristics of the cable-stayed cable are extracted by performing signal processing methods such as frequency spectrum analysis or vibration modal analysis on the curve, and the vibration frequency of the cable-stayed cable is obtained;

[0108] The extracted vibration frequency is used to calculate the real-time cable force of the cable-stayed cable according to the relationship formula between the cable-stayed cable vibration frequency and the cable force, and the real-time cable force of the cable-stayed cable is displayed on the client; the real-time dynamic monitoring of the cable force of the cable-stayed cable is realized, data support is provided for the safe operation of the bridge, so that the abnormal change of the cable force can be found in time, and corresponding measures can be taken to ensure the safety of the bridge;

[0109] S4, subsequent maintenance and evaluation of the damper: according to the long-term monitored data, the working performance of the damper is analyzed, including the wear condition of the friction pair, the change trend of the damping force, the stability of the displacement monitoring data, etc.; whether the damper works normally or not, whether there are problems such as performance decline, etc. are determined, and basis is provided for the maintenance and replacement of the damper;

[0110] The damper is checked and maintained regularly, such as the friction pair is found to be seriously worn, the sensor is found to be faulty, etc., and timely maintenance or replacement is performed to ensure the normal operation of the damper and the accuracy of the monitoring data; the service life of the damper is prolonged, the effective control of the damper on the vibration of the cable-stayed cable is ensured, and the safe operation of the bridge is ensured.

[0111] The friction type stay cable damper and cable force monitoring method provided by the application dissipate energy by relying on the friction of the friction pair, thereby realizing the function of stay cable vibration reduction. The friction damper has no risk of oil leakage because the damping medium is solid, and the post-maintenance can only replace the friction pair, which greatly facilitates the inspection and replacement, and greatly reduces the one-time installation cost and the post-operation cost. By arranging the displacement sensor, the cable force change can be monitored in real time and intelligently, and the variable friction resistance is realized by the roughness of different regions of the friction steel plate, thereby reducing the vibration load of the damper. The damping washer arranged at the position of the mounting bolt avoids the adverse effects caused by the bolt hole gap of the conventional damper, the spring washer is arranged to ensure the stability of the friction resistance after the wear of the friction pair, and the sensor arranged below the bolt can monitor the friction resistance in real time, thereby providing reliable data support for the safe operation of the bridge.

[0112] Those skilled in the art can easily understand that the above description is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

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) represents 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 (207) 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 (207) 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 the vibration process 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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