TMD counterweight structure of pedestrian overpass of high-speed railway

Abstract

The utility model provides a high-speed railway pedestrian overpass TMD counterweight structure, and relates to the technical field of TMDs, the high-speed railway pedestrian overpass TMD counterweight structure is provided with a plurality of independent cavities, the cavities are all used for containing viscous fluid or particles, the high-speed railway pedestrian overpass TMD counterweight structure is provided with a plurality of independent cavities, and the viscous fluid or particles are placed in each cavity. Each cavity is made to be in an incomplete filling state, so that when the TMD balance weight structure is driven by a vibrating overbridge to reciprocate, viscous fluid or particles in the cavities freely move in the cavities and collide with one another, kinetic energy is consumed, and the vibration reduction effect is enhanced. In addition, the multiple independent cavities are adopted for containing viscous fluid or particles, the mass center eccentricity rate of the TMD balance weight structure can be controlled, and then the stability of the balance weight structure during swinging is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of TMD, in particular to a TMD counterweight structure for a high-speed railway pedestrian bridge. Background Art

[0002] Research data shows that when the speed of high-speed trains exceeds 300km / h, the aerodynamic forces at the front and rear of the train increase significantly as the train speed increases. The vibration of the pedestrian bridge across the line is manifested as a free decay vibration dominated by the vertical natural frequency of the bridge, and the decay time is relatively slow. The calculation results of the limit value of the vertical vibration acceleration of the pedestrian bridge by introducing the annoyance rate model show that the acceleration is 1.0m / s 2 When the acceleration is 1.5m / s, about 26.3% of people will feel that the vibration is too large; 2 That is, about 56.3% of people will feel that the vibration is too loud.

[0003] Tuned Mass Damper (TMD) is an effective solution to reduce the vibration of structures (such as high-speed railway overpasses). When the dynamic parameters of TMD meet the dynamic tuning conditions, the force applied to the structure by the spring is equal to the exciting force on the structure caused by the wind pressure caused by the high-speed train passing by. The two forces are in opposite directions and cancel each other out to control the vibration of the main vibration system. The tuned mass damper TMD (Tuned Mass Damper) consists of a mass block, a spring and a damping system. The vibration frequency is adjusted to near the main structure frequency, changing the structural resonance characteristics to achieve a shock-absorbing effect. The mass block in the prior art is generally composed of several stacked steel plates, and the vibration reduction effect is poor. Utility Model Content

[0004] The utility model aims to provide a TMD counterweight structure for a high-speed railway pedestrian overpass to solve the problems existing in the above-mentioned prior art and improve the vibration reduction effect on the overpass.

[0005] To achieve the above purpose, the utility model provides the following solutions:

[0006] The utility model provides a TMD counterweight structure for a high-speed railway pedestrian bridge, which has a plurality of independent cavities, and the cavities are all used for containing viscous fluids or particles.

[0007] Preferably, it comprises a box body and a plurality of box bodies, the cavity is formed in the box body, and the box bodies are all arranged in the box body.

[0008] Preferably, it further comprises a plurality of counterweight plates, and the plurality of counterweight plates are detachably disposed in the box body.

[0009] Preferably, it also includes a clamping bolt, the box body is provided with a vertically extending threaded through hole, the bottom surface of the box body is provided with a threaded blind hole, the screw rod of the clamping bolt passes through the threaded through hole and is threadedly connected to the threaded blind hole to clamp the box body inside the box body.

[0010] Preferably, it also includes a clamping bolt, the counterweight plates are stacked from top to bottom, the counterweight plates are each provided with a threaded through hole, the bottom surface of the box body is provided with a threaded blind hole, the screw rod of the clamping bolt passes through the threaded through hole and is threadedly connected to the threaded blind hole to clamp the counterweight plate inside the box body.

[0011] Preferably, when the cavity is used to contain particles, the particles in the same cavity can be arranged by grading.

[0012] Compared with the prior art, the utility model has achieved the following technical effects:

[0013] The TMD counterweight structure of the high-speed railway pedestrian bridge provided by the utility model has multiple independent cavities, and a viscous fluid or particles are placed in each cavity, and each cavity is in an incompletely filled state. With this arrangement, when the TMD counterweight structure reciprocates driven by the vibrating bridge, the viscous fluid or particles in each cavity move freely in the cavity and collide with each other, thereby consuming kinetic energy and enhancing the vibration reduction effect.

[0014] In addition, the present application uses multiple independent cavities to accommodate viscous fluids or particles, which can control the eccentricity of the center of mass of the TMD counterweight structure, thereby improving the stability of the counterweight structure when it swings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a structural explosion diagram of the TMD counterweight structure of the high-speed railway pedestrian bridge provided by the utility model, which is only provided with a box body;

[0017] Figure 2 The structural explosion diagram of the TMD counterweight structure of the high-speed railway pedestrian bridge provided by the utility model, which is only provided with a counterweight plate;

[0018] In the figure: 1-box body; 2-box body; 3-weight plate; 4-threaded through hole; 5-flange. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] The inventor of the utility model submitted a patent application before the present application, with application number 202420021251.7, which provides an idea of ​​using particles to consume energy. However, it only uses one cavity to accommodate the particles, which easily leads to a large eccentricity of the center of mass of the counterweight structure and low stability. Based on this, the utility model provides a TMD counterweight structure for a high-speed railway pedestrian bridge, hereinafter referred to as the TMD counterweight structure. The TMD having the TMD counterweight structure is used to be set on a high-speed railway pedestrian bridge to reduce vibration of the high-speed railway pedestrian bridge. The TMD counterweight structure has multiple independent cavities, each of which is used to hold viscous fluids or particles, and each cavity cannot be filled, so that the cavity is in an incompletely filled state.

[0022] Compared with the prior art, the TMD counterweight structure of the high-speed railway pedestrian bridge provided by the utility model has multiple independent cavities, a viscous fluid or particles are placed in each cavity, and each cavity is in an incompletely filled state. With such an arrangement, when the TMD counterweight structure makes reciprocating motion driven by the vibrating bridge, the viscous fluid or particles in each cavity move freely in the cavity and collide with each other, thereby consuming kinetic energy and enhancing the vibration reduction effect.

[0023] Compared with the solution provided in application number 202420021251.7, the present application uses multiple independent cavities to accommodate viscous fluids or particles, which can control the eccentricity of the center of mass of the TMD counterweight structure, thereby improving the stability of the counterweight structure during swinging.

[0024] This embodiment only limits the TMD counterweight structure to have multiple independent cavities, and does not limit other structures on this basis. It can be understood that the utility model only needs to form multiple independent cavities in the TMD counterweight structure, and can place viscous fluids or particles in the cavities.

[0025] In some embodiments, such as Figure 1 As shown, the TMD counterweight structure includes a box body 1 and a plurality of box bodies 2 , a cavity is formed in the box body 2 , and the box bodies 2 are all arranged in the box body 1 .

[0026] This embodiment only provides a method for forming a cavity. It is understandable that the present invention is not limited thereto. For example, a partition plate may be used in the box 1 to divide the space of the box 1 and form a plurality of cavities.

[0027] There are many ways to arrange the box body 2 in the box body 1. For example, it can be directly placed in the box body 1. After the box body 1 is filled, it is pressed and sealed by the box cover of the box body 1. When stacked up and down, the upper box body 2 can serve as the box cover of the lower box body 2. Of course, the box cover can also be set separately. For example, an opening and closing cover is set at the upper opening of each box body 2, and the opening and closing cover is buckled on the box body 2 and seals the box body 2.

[0028] In some embodiments, the present embodiment further includes a clamping bolt, a vertically extending threaded through hole 4 is provided on the box body 2, a threaded blind hole is provided on the bottom surface of the box body 1, and the screw rod of the clamping bolt passes through the threaded through hole 4 and is threadedly connected to the threaded blind hole to clamp the box body 2 into the box body 1.

[0029] The present embodiment uses bolts to fix the box body 2. In other embodiments, the box body 2 may be fixed by means of snap-fitting or the like. The box body 2 may also be fixed by any method in the prior art of fixing multiple small box bodies 2 in a large box body 1. The present utility model does not limit the fixing method of the box body 2.

[0030] In some embodiments, such as Figure 2 As shown, the TMD counterweight structure further includes a plurality of counterweight plates 3 , and the plurality of counterweight plates 3 are detachably disposed in the box body 1 .

[0031] In some cases, the box body 2 can be removed from the box body 1 and the counterweight plate 3 can be installed as a counterweight structure. In some embodiments, the counterweight plate 3 and the box body 2 can also coexist in the box body 1, and the counterweight plate 3 can even serve as the box cover of the box body 2.

[0032] More specifically, the TMD counterweight structure also includes a clamping bolt, and the counterweight plates 3 are stacked from top to bottom. The counterweight plates 3 are each provided with a threaded through hole 4, and the bottom surface of the box body 1 is provided with a threaded blind hole. The screw rod of the clamping bolt passes through the threaded through hole 4 and is threadedly connected to the threaded blind hole to clamp the counterweight plate 3 in the box body 1.

[0033] The present embodiment includes a counterweight plate 3 and a box body 2. According to actual needs, the counterweight plate 3 and the box body 2 can be separately arranged in the box body 1, or they can be mixed in the box body 1. The positions of the threaded through holes 4 on the counterweight plate 3 and the threaded through holes 4 on the box body 2 correspond to each other, and their diameters are equal so that the counterweight plate 3 and the box body 2 can be fixed by clamping bolts of the same diameter.

[0034] In some embodiments, when the cavity is used to hold particles, the particles in the same cavity can be arranged by grading. By applying particles of different gradations and adjusting the size of the lead box, particle damping effects at different loading rates can be provided.

[0035] Figure 1 It only illustrates one arrangement of the box bodies 2, which does not mean that there is only one layer of the box bodies 2. The specific number of the box bodies 2 is determined according to the volume of the designed box body 1. It can be understood that in other embodiments, multiple box bodies 2 can be stacked.

[0036] In some embodiments, the threaded through hole 4 on the box body 2 can facilitate on-site manual access and rapid replacement of the internal granules. Specifically, a T-shaped threaded rod is configured on-site, and the box body 2 is removed from the box body 1 by screwing the bottom of the T-shaped threaded rod into the threaded through hole 4 and then lifting it up.

[0037] In some embodiments, flanges 5 extending outward are provided on both sides of the upper width direction of the box body 1. The flanges 5 are used to provide support positions for elastic components such as springs. Elastic components such as springs are vertically arranged below the flanges 5. Such an arrangement can make the center of gravity of the TMD counterweight structure below the spring fulcrum and within the fulcrum, thereby ensuring that the vibration of the TMD is vertical vibration to improve the efficiency, and will not cause the equipment to overturn during use, thereby ensuring safety.

[0038] The utility model also provides a high-speed railway pedestrian bridge TMD, which comprises the above-mentioned TMD counterweight structure and is used for being installed on the high-speed railway pedestrian bridge to reduce vibration of the high-speed railway pedestrian bridge.

[0039] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A TMD counterweight structure for a high-speed railway pedestrian bridge, characterized in that: It has a plurality of independent cavities, each of which is used to contain viscous fluid or particles; each of the cavities is in an incompletely filled state; it also includes a box body and a plurality of box bodies, the cavities are formed in the box bodies, and the box bodies are all arranged in the box body.

2. The TMD counterweight structure for a high-speed railway pedestrian bridge according to claim 1 is characterized in that: It also includes a plurality of counterweight plates, which are detachably disposed in the box body.

3. The TMD counterweight structure for a high-speed railway pedestrian bridge according to claim 1 is characterized in that: It also includes a clamping bolt, the box body is provided with a vertically extending threaded through hole, the bottom surface of the box body is provided with a threaded blind hole, the screw rod of the clamping bolt passes through the threaded through hole and is threadedly connected to the threaded blind hole to clamp the box body inside the box body.

4. The TMD counterweight structure for a high-speed railway pedestrian bridge according to claim 2 is characterized in that: It also includes a clamping bolt. The counterweight plates are stacked from top to bottom, each of the counterweight plates is provided with a threaded through hole, and the bottom surface of the box body is provided with a threaded blind hole. The screw rod of the clamping bolt passes through the threaded through hole and is threadedly connected to the threaded blind hole to clamp the counterweight plate inside the box body.

5. The TMD counterweight structure for a high-speed railway pedestrian bridge according to claim 1, characterized in that: When the cavity is used to contain particles, the particles in the same cavity can be arranged by grading.

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