A vibration-reducing contact network positioning mechanism and its design method

Abstract

The present invention discloses a vibration-damping contact network positioning mechanism and a design method thereof, comprising a positioning rod, a positioner and a damping vibration absorber; the damping vibration absorber comprises an inertia capacity component, an energy-absorbing component and an elastic base; the inertia capacity component and the energy-absorbing component are mechanically connected in parallel; the elastic base comprises a first elastic base and a second elastic base, one end of the damping vibration absorber is connected to the positioner through the first elastic base, and the other end is connected to the positioning rod through the second elastic base. The design method is applied to the design of the above-mentioned vibration-damping contact network positioning mechanism. The present invention arranges a damping vibration absorber between the positioner and the positioning rod, and an inertia capacity component is arranged in the damping vibration absorber, which has good energy absorption effect, good vibration reduction and energy consumption effect, can extend the service life of components, effectively control the movement of the positioner, and ensure safe and reliable train operation.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction of contact network equipment, and in particular to a vibration reduction type contact network positioning mechanism and a design method thereof. Background Art

[0002] The catenary system is the transmission line overhead, supplying power to electric locomotives. It consists of a contact suspension, support system, positioning device, supports, and foundation. The positioning device secures the contact wire within the pantograph's operating trajectory, ensuring it stays attached to the pantograph and transferring horizontal loads from the contact wire to the support. During train operation, the pantograph exerts a constant upward force on the contact wire, ensuring reliable contact between the two and ensuring proper current flow. However, the mechanical effect of the pantograph's lifting force on the contact suspension not only elevates the contact wire but also lifts the positioner as it passes the contact point. If the positioner is lifted excessively, the pantograph could collide with the positioner or main positioner tube. This is particularly true on curves, where the pantograph tilts with the train due to superelevated outer rails. This creates a greater risk of collision at the pantograph positioner. When a train runs at high speed, the pantograph's height changes rapidly, generating significant inertial forces that significantly impact contact pressure. Furthermore, the aerodynamic forces acting on the pantograph increase the pantograph's lifting force, causing the positioner to lift excessively, potentially leading to a pantograph collision. Excessive lift can also increase friction and damage to the pantograph and contact wire. This requires that the catenary positioner's lift must not exceed specified limits, and appropriate limiting measures must be implemented.

[0003] During train operation, wind speed and operating speed can cause the contact wire to shift horizontally, oscillate, and jump, leading to pantograph disconnection and unstable train operation. This instantaneous disconnection generates arcing, causing high-temperature corrosion that damages the contact wire and pantograph slide, accelerating wear and shortening its lifespan. Furthermore, mass concentration points on the contact wire, such as the positioner, contact wire clamp, and wire fork, have poor elasticity and are known as "hard spots." Even at low train speeds, disconnection can sometimes occur at these hard spots. Furthermore, localized wear increases at these hard spots, shortening the lifespan of the contact wire. Positioners are required to not only minimize horizontal contact wire displacement, self-oscillation, and jump, but also to reduce these "hard spots."

[0004] Currently, the rectangular positioners, parallel positioners, and French positioners on the market do not have a relatively mature buffer structure. In the contact network system, the positioners will produce offline and hard point phenomena, and cannot limit the degree to which the pantograph is lifted upward during the train impact. In strong wind environments, the safe and reliable operation of the contact network cannot be guaranteed. For example, in recent years, during the maintenance of the contact network of the Beijing-Guangzhou High-Speed ​​Railway (Wuhan-Guangzhou Section), abnormal wear defects were found in the hook-and-ring connection parts of the positioners and positioner supports. The positioners and positioner supports all had varying degrees of wear. During operation, the worn positioners and positioner supports embedded in each other, exacerbating the wear process, affecting the normal operation of the equipment, and even posing safety hazards. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a vibration reduction and energy absorption mechanism for a contact network locator and its design method, which has good energy absorption effect, good vibration reduction and energy consumption effect, can extend the service life of components, effectively control the movement of the locator, and ensure safe and reliable train operation.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A vibration-damping contact network positioning mechanism includes a positioning rod, a positioner and a damping vibration absorber; the damping vibration absorber includes an inertia capacity component, an energy-absorbing component and an elastic base, the inertia capacity component and the energy-absorbing component are mechanically connected in parallel, the elastic base includes a first elastic base and a second elastic base, one end of the damping vibration absorber is connected to the positioner through the first elastic base, and the other end is connected to the positioning rod through the second elastic base.

[0008] As a further improvement of the above solution:

[0009] The inertia capacity assembly includes a cylinder, an inertia capacity block and a transmission screw; one end of the cylinder is fixedly connected to the second elastic base, and the other end is sleeved with the transmission screw, and the exposed end of the transmission screw is fixedly connected to the first elastic base; a first cavity is provided inside the cylinder, and the inertia capacity block is hinged in the first cavity; the inertia capacity block is provided with a channel along its axial direction, and the transmission screw can perform axial telescopic movement in the channel; a threaded guide rail is provided on the surface of the channel, and a transmission ball is provided in the threaded guide rail, which can drive the inertia capacity block to rotate circumferentially when the screw performs axial telescopic movement.

[0010] A second cavity is provided inside the inertia block, and the energy dissipation component includes a damping agent and damping particles arranged in the second cavity; and a sealing hole for introducing the damping agent and damping particles is provided on the inertia block.

[0011] The elastic base comprises an inner ring for sleeved on the positioning rod or the positioner, an outer ring connected to the transmission screw or the barrel, and an elastic layer made of elastic material arranged between the inner ring and the outer ring.

[0012] The elastic layer is provided with a third cavity for adjusting the stiffness characteristics of the elastic base.

[0013] It also includes an oblique wrist arm and a positioning rod support, wherein the positioning rod, the positioning rod support and the oblique wrist arm are hinged to each other to form a triangular support structure.

[0014] The axial direction of the outer ring is parallel to the axial direction of the cylinder, and the axial direction of the inner ring is relatively inclined to the axial direction of the outer ring, so that the damping vibration absorber can be arranged at an angle relative to the positioning rod; or the axial direction of the outer ring is perpendicular to the axial direction of the cylinder, so that the damping vibration absorber can be arranged vertically relative to the positioning rod.

[0015] The cylinder comprises an upper cylinder and a lower cylinder, and the upper cylinder and the lower cylinder are connected as a whole by bolts; the upper cylinder and the lower cylinder are fixedly connected with a member for forming a hinged connection between the inertia block and the cylinder.

[0016] A design method for the vibration-damping contact network positioning mechanism as described above comprises the following steps:

[0017] S1. Establish a dynamic simulation analysis model for the catenary positioning mechanism. The impact load on the positioner during train operation is used as input. The acceleration, velocity, and displacement response results of the positioner model's end nodes are used as evaluation indicators. The optimal parameters of the damping absorber, including the physical mass m, stiffness k, and damping coefficient c, are obtained through simulation calculation.

[0018] S2. Adjust the moment of inertia J and the lead P of the ball and screw drive by adjusting the material and size of the inertia block so that the inertia coefficient mg ​​of the damper is equal to the physical mass m;

[0019] S3. Establish a solid finite element model of the elastic base, set material parameters and boundaries, obtain the stiffness characteristics of the elastic base through simulation analysis, and verify through experimental testing; adjust the stiffness value of the elastic base to stiffness k by changing the design parameters of the elastic base;

[0020] S4. Adjusting the damping coefficient of the damping vibration absorber to the damping coefficient c by changing the design parameters of the energy dissipation component;

[0021] S5. Indoor construction of a physical contact network positioning mechanism including the damping vibration absorber designed in steps S1 to S4. An electromagnetic exciter is used to simulate the impact load on the positioner during train operation. The acceleration, velocity, and displacement sensor test responses at the end of the positioner model are tested to determine whether the response results meet the vibration reduction target requirements. If they meet the requirements, the trial production is passed. If not, steps S1 to S5 are repeated.

[0022] In step S3, the design parameters of the elastic base include the shape and size of the third cavity, and at least one of the thickness and formula of the elastic layer; in step S4, the design parameters of the energy-absorbing component include at least one of the material, quantity, density, filling rate, and particle size of the damping agent and damping particles filled inside the inertia block.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] The present invention reduces the maximum vibration displacement of the positioner end and rapidly decays the vibration amplitude by arranging a damping vibration absorber between the positioner and the positioning rod, thereby effectively controlling the movement of the positioner; an inertia capacity component is provided in the damping vibration absorber, and the inertia capacity mass is used instead of the physical mass, thereby reducing the actual mass of the additional subsystem, achieving good energy absorption effect, excellent vibration reduction and energy consumption effect, extending the service life of components, and ensuring safe and reliable train operation.

[0025] The present invention significantly reduces the actual mass and volume of the additional subsystem by arranging the particle damping and viscous damping inside the inertial block as part of the inertial mass, thereby saving space and facilitating installation.

[0026] The damping vibration absorber of the present invention can effectively improve the energy dissipation efficiency of the energy-consuming component through the combined action of inertia, particle damping and viscous damping.

[0027] The first elastic base and the second elastic base of the damping vibration absorber of the present invention are elastic structures, which can achieve three-way flexibility and angle design, so that the mechanism can adapt to a wider range of deformation after being subjected to force during installation and operation.

[0028] The present invention has a compact overall structure and is easy to install. It can be widely used in electrified railway contact networks, can effectively absorb and consume impact vibration energy, effectively control the movement of the positioner, reduce wear, and extend the service life of components.

[0029] The damping vibration absorber used in the present invention has a tuning mechanism and an energy consumption efficiency enhancement mechanism. By adjusting the material and size of the inertia block; the material, quantity, density, filling rate, and particle size of the damping agent and damping particles; and the shape and size of the third cavity in the elastic base, the thickness and formula of the elastic material and other parameters, the damping vibration absorber can achieve better vibration reduction and energy absorption effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view of the vibration-damping contact network positioning mechanism in the device embodiment.

[0031] Figure 2 2 is a perspective view of a damping vibration absorber in an embodiment of the device.

[0032] Figure 3 2 is a cross-sectional view of a damping vibration absorber in an embodiment of the device.

[0033] Figure 4 It is a partially cutaway perspective view of the inertia block in the device embodiment.

[0034] Figure 5 It is a half-section view of the inertia block with energy-consuming components in the device embodiment.

[0035] Figure 6 This is a time history diagram of the vibration displacement of the locator when a train passes by in the device embodiment.

[0036] The numbers in the figure represent:

[0037] 1. Positioning rod; 2. Positioner; 3. Damping vibration absorber; 31. Cylinder; 311. First cavity; 312. Upper cylinder; 313. Lower cylinder; 32. Inertia block; 321. Second cavity; 322. Flange; 323. Threaded guide rail; 33. Screw; 34. Ball; 35. Damping agent; 36. Damping particles; 37. Sealing hole; 38. Thrust bearing; 39. Channel; 4. Elastic base; 41. First elastic base; 42. Second elastic base; 43. Inner ring; 44. Outer ring; 45. Elastic layer; 46. Third cavity; 5. Oblique wrist arm; 6. Positioning rod support. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Device Example:

[0040] Figures 1 to 5An embodiment of a vibration-damping contact network positioning mechanism of the present invention is shown, comprising a positioning rod 1 and a positioner 2, with a damping vibration absorber 3 provided between the positioning rod 1 and the positioner 2; the damping vibration absorber 3 comprises an inertia capacity component, an energy-absorbing component and an elastic base 4, the inertia capacity component and the energy-absorbing component are connected in parallel, the elastic base 4 comprises a first elastic base 42 and a second elastic base 42, one end of the damping vibration absorber 3 is connected to the positioner 2 via the first elastic base 42, and the other end is connected to the positioning rod 1 via the second elastic base 42. In this structure, the inertia capacity component of the damping vibration absorber 3 transfers and stores part of the energy, and releases it with a certain delay, thereby enhancing the stability of the system; the energy-absorbing component and the inertia capacity component are mechanically connected in parallel, absorbing the energy stored in the inertia capacity component from the system and converting it into other forms of energy, and further playing the role of energy absorption and vibration reduction in cooperation with the elastic base 4. When the train passes through the positioner 2, the vibration displacement time history at the suspension string is as follows: Figure 6 As shown: its maximum vibration displacement can reach 100mm, and the vibration peak frequency is less than 10Hz, which is a low-frequency impact. By setting a damping vibration absorber 3 between the locator 2 and the positioning rod 1, the maximum vibration displacement of the end of the locator 2 is reduced, and the vibration amplitude is quickly attenuated, which can effectively control the displacement of the locator 2. The impact displacement of the locator 2 after the train passes is large, and the main vibration frequency is usually 1 to 3Hz. The use of dynamic vibration absorbers can absorb vibration energy very well, but conventional dynamic vibration absorbers often require a large physical mass when playing a vibration reduction role, affecting the bearing strength of the support system. This device significantly reduces the actual mass and volume of the additional subsystem by setting an inertia component in the damping vibration absorber 3, and using inertia mass instead of physical mass. It has good energy absorption effect, good vibration reduction and energy consumption effect, and can extend the service life of components, ensuring safe and reliable train operation.

[0041] In this embodiment, the inertia capacity assembly includes a cylinder 31, an inertia capacity block 32 and a transmission screw 33; one end of the cylinder 31 is fixedly connected to the second elastic base 42, and the other end is sleeved with the transmission screw 33, and the exposed end of the transmission screw 33 is fixedly connected to the first elastic base 41; a first cavity 311 is provided inside the cylinder 31, and the inertia capacity block 32 is hinged in the first cavity 311; the inertia capacity block 32 is provided with a channel 39 along its axial direction, and the transmission screw 33 can perform axial telescopic movement in the channel 39; a threaded guide rail 323 is provided on the surface of the channel 39, and a transmission ball 34 is provided in the threaded guide rail 323, which can drive the inertia capacity block 32 to rotate circumferentially when the screw 33 performs axial telescopic movement. In this structure, vibrations applied to the positioner 2 are transmitted to the drive screw 33 via the first elastic base 42, causing the drive screw 33 to telescope within the channel 39. The channel 39 is threaded with threads that mate with the balls 34. Driven by the balls 34, the inertia block 32 is then driven to rotate circumferentially, converting the vibration energy into kinetic energy that drives the inertia block 32 to rotate, thereby absorbing and dissipating the energy. The energy absorption and vibration reduction effect of the damping absorber 3 can be optimized by adjusting the material and size of the inertia block 32, adjusting the moment of inertia, and the lead of the transmission between the balls 34 and the screw 33.

[0042] In this embodiment, a second cavity 321 is defined within the inertia block 32. The energy dissipation assembly includes a damping agent 35 and damping particles 36 disposed within the second cavity 321. A sealing hole 37 is provided on the inertia block 32 for introducing the damping agent 35 and damping particles 36. In this structure, the particle damping and viscous damping are disposed within the inertia block as part of the inertia mass, significantly reducing the actual mass and volume of the additional subsystem, saving space and facilitating installation.

[0043] After the elastic base 4 is buffered, the linear motion received by the positioner 2 is converted into the rotational motion of the inertial block 32 in the inertial component, and the kinetic energy of the inertial block 32 is dissipated through particle damping and viscous damping. When the inertial capacitor of the present invention works together with the particle damping and viscous damping structure, it can effectively improve the energy dissipation efficiency of the energy dissipation structure. On the one hand, this is due to the amplification of the particle damping and viscous damping effects by the inertial component implementation mechanism. On the other hand, the freedom of movement of the inertial block 32 in the inertial capacitor-spring-damping system is not synchronized with the vibration of the main structure of the positioning device, so that the deformation of the internal freedom is amplified, and the deformation of the energy dissipation device is also increased accordingly, thereby achieving an improvement in energy dissipation efficiency. In addition, the tuning of the inertial mass is combined with various energy dissipation mechanisms such as particle collision, friction, and viscous fluid to introduce a nonlinear energy dissipation method, expand the frequency reduction band, and increase the robustness of the system. In addition, the damping vibration absorber 3 used in the present invention has a tuning mechanism and an energy consumption efficiency enhancement mechanism, which can optimize the energy absorption and vibration reduction effect of the damping vibration absorber 3 by adjusting parameters such as the material, quantity, density, filling rate, and particle size of the damping agent 35 and the damping particles 36 in the second cavity 321.

[0044] In this embodiment, the elastic base 4 includes an inner ring 43 for sleeved onto the positioning rod 1 or positioner 2, an outer ring 44 connected to the drive screw 33 or the barrel 31, and an elastic layer 45 made of elastic material disposed between the inner ring 43 and the outer ring 44. A third cavity 46 is provided on the elastic layer 45 for adjusting the stiffness characteristics of the elastic base 4. In this structure, the provision of the elastic layer 45 ensures flexibility even in the direction of train travel, enabling vibration damping and reduction. By adjusting the shape and size of the third cavity 46, as well as the thickness and formulation of the elastic material, appropriate compression and rotational stiffness can be achieved simultaneously in multiple directions, further enhancing the vibration and energy absorption effectiveness of the damping absorber 3.

[0045] In this embodiment, the cylinder 31 comprises an upper cylinder 312 and a lower cylinder 313, which are connected integrally by bolts. A thrust bearing 38 is fixedly attached to each of the upper and lower cylinders 312, 313, to form a hinged connection between the inertial block 32 and the cylinder 31. In this structure, the upper and lower cylinders 312, 313 are detachably connected by bolts, facilitating installation and replacement of components within the cylinder 31. Specifically, the cylinder 31 is provided with a fixed step that interference fits with the thrust bearing 38. The end of the inertial block 32 is provided with a flange 322 that interference fits within the inner hole of the thrust bearing 38, thereby forming a hinged connection between the inertial block 32 and the cylinder 31 via the thrust bearing 38.

[0046] This embodiment also includes an oblique arm 5 and a positioning rod support 6. The positioning rod 1, the positioning rod support 6, and the oblique arm 5 are hingedly connected to form a triangular support structure. This structure makes the mechanism compact and easy to install. It can be widely used in electrified railway contact lines, effectively absorbs and dissipates impact and vibration energy, effectively controls the movement of the positioner 2, reduces wear, and extends component life.

[0047] In this embodiment, the axial direction of the outer ring 44 is parallel to the axial direction of the cylinder 31, while the axial direction of the inner ring 43 is inclined relative to the axial direction of the outer ring 44. This allows the damping vibration absorber 3 to be arranged at an angle relative to the positioning rod 1. Alternatively, the axial direction of the outer ring 44 is perpendicular to the axial direction of the cylinder 31, allowing the damping vibration absorber 3 to be arranged perpendicularly relative to the positioning rod 1. In this structure, the installation position of the damping vibration absorber 3 can be adjusted by changing the design shape of the inner ring 43, thereby accommodating the connection between the positioning rod 1 and the positioner 2 in various structural forms and increasing the adaptability.

[0048] Method Example:

[0049] A design method for a vibration-damping contact network positioning mechanism comprises the following steps:

[0050] S1. A dynamic simulation analysis model for the contact network positioning mechanism is established. The impact load on the positioner 2 during train operation is used as input. The response results of acceleration, velocity, and displacement of the end node of the positioner 2 model are used as evaluation indicators. The optimal parameters of the damping absorber 3, including physical mass m, stiffness k, and damping coefficient c, are obtained through simulation calculation.

[0051] S2. By adjusting the material and size of the inertia block 32, the moment of inertia J and the lead P of the ball 34 and the screw 33 are adjusted so that the inertia coefficient mg ​​of the damping vibration absorber 3 is equal to the physical mass m, where mg = (2π / p)2·J.

[0052] S3. Establish a solid finite element model of the elastic base 4, set material parameters and boundaries, obtain the stiffness characteristics of the elastic base 4 through simulation analysis, and verify it through experimental testing; by changing the shape and size of the third cavity 46 in the elastic base 4, the thickness and formula of the elastic material, etc., the stiffness value of the elastic base 4 is adjusted to stiffness k.

[0053] S4. By adjusting the material, quantity, density, filling rate, particle size and other parameters of the damping agent 35 and the damping particles 36 filled in the inertia block 32, a suitable damping coefficient c is obtained through experimental testing.

[0054] S5. Build a physical contact network positioning mechanism indoors, use an electromagnetic exciter to simulate the impact load on the locator 2 when the train is running, test the acceleration, velocity, and displacement sensor test response results of the locator 2 model end, and determine whether the response results meet the vibration reduction target requirements. If they meet the requirements, the trial production will be passed. If not, repeat steps S1 to S5.

[0055] The damping vibration absorber 3 used in the present invention has a tuning mechanism and an energy consumption efficiency enhancement mechanism. By adjusting the material and size of the inertia block 32; the material, quantity, density, filling rate, and particle size of the damping agent 35 and the damping particles 36; and the shape and size of the third cavity 46 in the elastic base 4, the thickness and formula of the elastic material and other design parameters, the damping vibration absorber 3 can achieve better vibration reduction and energy absorption effects.

[0056] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A vibration-damping contact network positioning mechanism, characterized in that: The invention comprises a positioning rod (1), a positioning device (2) and a damping vibration absorber (3); the damping vibration absorber (3) comprises an inertia capacity component, an energy dissipation component and an elastic base (4); the inertia capacity component and the energy dissipation component are mechanically connected in parallel; the elastic base (4) comprises a first elastic base (41) and a second elastic base (42); one end of the damping vibration absorber (3) is connected to the positioning device (2) via the first elastic base (41), and the other end is connected to the positioning rod (1) via the second elastic base (42); The inertia capacity assembly includes a cylinder (31), an inertia capacity block (32) and a transmission screw (33); one end of the cylinder (31) is fixedly connected to the second elastic base (42), and the other end is sleeved with the transmission screw (33), and the exposed end of the transmission screw (33) is fixedly connected to the first elastic base (41); a first cavity (311) is provided inside the cylinder (31), and the inertia capacity block (32) is hinged in the first cavity (311); the inertia capacity block (32) is provided with a channel (39) along its axial direction, and the transmission screw (33) can perform axial telescopic movement in the channel (39); a threaded guide rail (323) is provided on the surface of the channel (39), and a transmission ball (34) is provided in the threaded guide rail (323) to drive the inertia capacity block (32) to rotate circumferentially when the screw (33) performs axial telescopic movement; A second cavity (321) is provided inside the inertia block (32), and the energy dissipation component includes a damping agent (35) and damping particles (36) disposed in the second cavity (321); a sealing hole (37) for introducing the damping agent (35) and the damping particles (36) is provided on the inertia block (32); The elastic base (4) comprises an inner ring (43) for being sleeved on the positioning rod (1) or the positioner (2), an outer ring (44) connected to the transmission screw (33) or the barrel (31), and an elastic layer (45) made of elastic material and arranged between the inner ring (43) and the outer ring (44).

2. The vibration-damping contact network positioning mechanism according to claim 1, characterized in that: A third cavity (46) for adjusting the stiffness characteristics of the elastic base (4) is provided on the elastic layer (45).

3. The vibration-damping contact network positioning mechanism according to claim 1, characterized in that: It also includes an oblique wrist arm (5) and a positioning rod support (6), wherein the positioning rod (1), the positioning rod support (6) and the oblique wrist arm (5) are hinged to each other to form a triangular support structure.

4. The vibration-damping contact network positioning mechanism according to claim 3, characterized in that: The axial direction of the outer ring (44) is parallel to the axial direction of the cylinder (31), and the axial direction of the inner ring (43) is inclined to the axial direction of the outer ring (44), so that the damping vibration absorber (3) can be arranged obliquely relative to the positioning rod (1); or the axial direction of the outer ring (44) is perpendicular to the axial direction of the cylinder (31), so that the damping vibration absorber (3) can be arranged vertically relative to the positioning rod (1).

5. The vibration-damping contact network positioning mechanism according to claim 1, characterized in that: The cylinder (31) comprises an upper cylinder (312) and a lower cylinder (313), wherein the upper cylinder (312) and the lower cylinder (313) are connected as a whole by bolts; a thrust bearing (38) is fixedly connected inside the upper cylinder (312) and the lower cylinder (313) for forming a hinged connection between the inertia block (32) and the cylinder (31).

6. A design method for a vibration-damping contact network positioning mechanism according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Establish a dynamic simulation analysis model for the contact network positioning mechanism, take the impact load on the positioner (2) during train operation as input, take the response results of acceleration, velocity, and displacement of the end node of the positioner (2) model as evaluation indicators, and obtain the optimal parameters of the damping absorber (3) including physical mass m, stiffness k, and damping coefficient c through simulation calculation; S2. By adjusting the material and size of the inertia block (32), the moment of inertia J and the lead P of the ball (34) and the screw (33) are adjusted so that the inertia coefficient mg ​​of the damping vibration absorber (3) is equal to the physical mass m; S3, establishing a solid finite element model of the elastic base (4), setting material parameters and boundaries, obtaining the stiffness characteristics of the elastic base (4) through simulation analysis, and verifying it through experimental testing; adjusting the stiffness value of the elastic base (4) to the stiffness k by changing the design parameters of the elastic base (4); S4, adjusting the damping coefficient of the damping vibration absorber (3) to the damping coefficient c by changing the design parameters of the energy dissipation component; S5. Indoor construction of a physical contact network positioning mechanism including the damping vibration absorber (3) designed in steps S1 to S4, using an electromagnetic exciter to simulate the impact load on the positioner (2) during train operation, testing the acceleration, velocity, and displacement sensor test response results of the positioner (2) model end, and determining whether the response results meet the vibration reduction target requirements. If they meet the requirements, the trial production is passed. If not, repeat steps S1 to S5.

7. The design method of the vibration-damping catenary positioning mechanism according to claim 6, characterized in that: In step S3, the design parameters of the elastic base (4) include at least one of the shape and size of the third cavity (46), and the thickness and formula of the elastic layer (45); in step S4, the design parameters of the energy dissipation component include at least one of the material, quantity, density, filling rate, and particle size of the damping agent (35) and damping particles (36) filled inside the inertia block (32).

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