Tuned mass damper for seabed floating tunnel inerter

Abstract

The invention discloses a tuned mass damper for an inerter of a submarine floating tunnel, and relates to the technical field of cross-sea traffic. Comprising an acceleration type inerter which is located between a lane layer of a tunnel pipe body and a mass block; inertia force transmission between the tunnel pipe body and the mass block is achieved through a gear transmission system in the acceleration type inerter, and the inertia force is equivalent to partial mass of the mass block. The inertia force of the tunnel pipe body is transmitted to the shock absorber through the acceleration type inerter, so that the mass of a part of mass blocks is replaced, the overall mass and size of the shock absorber are reduced, and the influence of a large mass block on the tunnel pipe body is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of cross-sea transportation, and in particular to an inertia tuned mass damper for a submarine suspended tunnel. Background Art

[0002] With the continuous growth of modern society's demand for transportation, transportation infrastructure such as cross-sea channels is developing towards larger scale, higher flexibility and deeper waters. At present, there are two main types of cross-sea structures: cross-sea bridges and submarine immersed tube tunnels. In contrast, submarine suspended tunnels have shown obvious advantages. Since the suspended tunnel is located at a depth of less than 30 meters underwater, this greatly reduces the risk of collision with ships and the impact of wave loads on it, making it safer than cross-sea bridges. In addition, when facing longer and deeper waters, the construction difficulty of immersed tube tunnels is often much greater than that of suspended tunnels. However, whether it is an immersed tube tunnel or a suspended tunnel, they are located underwater and will not occupy sea shipping routes, thereby effectively reducing the impact on the marine environment. Therefore, with the continuous deepening and improvement of suspended tunnel technology research, it can be foreseen that suspended tunnels will become an important development trend in the construction of cross-sea channels in the future.

[0003] Suspended tunnels are mainly divided into two types according to their supporting systems: tension leg or anchor cable underwater suspended tunnels, and barrel suspended tunnels. Tension leg or anchor cable suspended tunnels maintain the stability of the tunnel body by connecting tension legs or anchor cables to the seabed foundation. This structural form is suitable for situations where the buoyancy of the tube body is greater than the gravity; while barrel suspended tunnels maintain stability by connecting buoys to the tube body. This structural form is more suitable for situations where the buoyancy of the tube body is less than the gravity in the design of suspended tunnel structures. It can be seen that as a new type of cross-sea transportation structure, the overall support system of the suspended tunnel has simpler and clearer constraints than traditional transportation structures. Therefore, suspended tunnels have higher requirements in terms of motion control.

[0004] In the existing large-scale building vibration control technology, passive control is a widely used method. In this method, the control device passively generates motion response under the drive of the main structure, thereby eliminating the energy of the main structure without providing external energy. Passive control is mainly divided into three types: basic vibration isolation, energy dissipation damping and tuning vibration reduction. Basic vibration isolation technology is usually applied to the bottom of the structure, and the vibration energy is blocked from being transmitted to the upper part of the structure by setting a vibration isolation layer. In the field of construction, house vibration isolation devices are generally installed at the bottom of the building; while in the field of bridges, vibration isolation devices are usually installed between bridge piers and beams. At present, the most widely used vibration isolation devices include laminated rubber bearings and friction pendulum sliding devices. Energy dissipation damping technology is to provide additional damping by setting an energy dissipation device and using the local deformation of the structure to consume seismic energy. The energy dissipation materials used in these energy dissipation devices are mainly lead, mild steel and various memory alloys. Tuning vibration reduction technology is to attach a relatively lightweight mass block to the main structure that needs to be controlled. This mass block absorbs the kinetic energy of the main structure by tuning resonance with the main structure, and then dissipates this part of energy through the damping mechanism.

[0005] When using passive control devices to achieve the best vibration control effect, it is usually necessary to match a larger mass block. For traditional longitudinal configuration building structures, this requirement is relatively easy to meet because they can withstand larger mass blocks. However, for transverse suspended tunnels, if the same vibration control effect is to be achieved, the use of larger mass blocks will inevitably increase the volume of the control device, which will cause the suspended tunnel to be subjected to excessive concentrated forces in some parts. This situation will cause significant deformation of the overall tunnel configuration, which not only greatly increases the difficulty of designing the suspended tunnel, but also poses a serious threat to its safety in use. Summary of the invention

[0006] The object of the present invention is to provide a submarine suspended tunnel inertia tuned mass damper, which is based on the acceleration type inertia container to convert the acceleration of the tunnel tube movement, thereby realizing the partial mass of the equivalent mass block, thereby reducing the overall mass and volume of the damper.

[0007] To achieve the above-mentioned purpose, the technical solution of the present application is: an inertia tuned mass damper for an undersea suspended tunnel, comprising an accelerating inertia container, which is located between the lane layer of a tunnel body and a mass block; the inertia force transmission between the tunnel body and the mass block is realized through a gear transmission system inside the accelerating inertia container, and the inertia force is equivalent to a partial mass of the mass block.

[0008] In one embodiment, the acceleration inertia container includes a gear transmission system located in a protective shell, and the gear transmission system includes more than one first driving wheel, more than one second driving wheel, more than one first driven wheel, and more than one second driven wheel. The first driving wheel is respectively meshed with the tooth track at the top of the protective shell and the first driven wheel, and the second driving wheel is respectively meshed with the tooth track at the bottom of the protective shell and the second driven wheel, and the first driven wheel and the second driven wheel are meshed and connected.

[0009] In one embodiment, when relative motion occurs between the tunnel body and the mass block, inertial force transmission is achieved through the gear track on the top of the protection shell, the first driving wheel, the first driven wheel, the second driven wheel, the second driving wheel, and the gear track at the bottom of the protection shell, which can be equivalent to part of the mass of the mass block;

[0010] In one embodiment, the equivalent mass expression is:

[0011]

[0012] Where: is the mass of each gear; r i and r j is the diameter ratio of the driving wheel to the driven wheel.

[0013] In one embodiment, a first fixing rod is connected to one end of the top of the protection shell, and the first fixing rod is connected to the bottom of the lane layer of the tunnel tube; a second fixing rod is connected to the other end of the bottom of the protection shell, and the second fixing rod is connected to the mass block. Preferably, the protection shell can be a split structure.

[0014] In one embodiment, the first driving wheel and the second driving wheel are fixed to the protective housing through a main gear shaft, and the first driven wheel and the second driven wheel are fixed to the protective housing through a slave gear shaft.

[0015] In one of the embodiments, it also includes a metal spring system, which is located between the lane layer of the tunnel tube and the mass block; the metal spring system includes a metal spring arranged between a first metal connecting plate and a second metal connecting plate, the first metal connecting plate is connected to the bottom of the lane layer of the tunnel tube, and the second metal connecting plate is connected to the mass block.

[0016] In one of the embodiments, by adjusting the distance between the first metal connecting plate and the second metal connecting plate, the metal spring generates a tensioning force for adjusting the natural frequency of the shock absorber.

[0017] In one of the embodiments, it also includes a damping energy dissipation system, which is located between the lane layer of the tunnel body and the mass block; the damping energy dissipation system includes a metal rod and a metal elastic damping element sleeved on the metal rod, the metal rod is connected to the bottom of the lane layer of the tunnel body through a first metal fixing piece, and the metal elastic damping element is connected to the mass block through a second metal fixing piece.

[0018] In one embodiment, when the tunnel tube and the mass block move relative to each other, the metal rod and the metal elastic damping element are driven to move relative to each other, and the motion energy is dissipated through the metal elastic damping element.

[0019] The present invention adopts the above technical solution, and can achieve the following technical effects:

[0020] 1) The inertial force of the tunnel body is transmitted to the shock absorber through the accelerating inertia vessel, thereby replacing part of the mass block, thereby reducing the overall mass and volume of the shock absorber and avoiding the impact of the large mass block on the tunnel body;

[0021] 2) Since each part is rigidly connected, the tunnel body and the shock absorber can be considered as a whole, which simplifies the load transfer process and reduces the difficulty of load calculation;

[0022] 3) The damping energy dissipation system in this application ensures that the energy of the entire tunnel is rapidly dissipated during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the structure of an inertia tuned mass damper for a submarine suspended tunnel;

[0025] Figure 2 It is a schematic diagram of the structure of the metal spring system;

[0026] Figure 3 It is a schematic diagram of the structure of an accelerating inertial container;

[0027] Figure 4 It is a schematic diagram of the structure of the damping energy dissipation system;

[0028] Figure 5 It is a schematic diagram of the structure of the metal mass block;

[0029] Explanation of the serial numbers in the figure: 1. Lane layer of the tunnel body; 2. Metal spring system; 3. Acceleration inertia container; 4. Damping energy dissipation system; 5. Mass block; 201. First metal connecting plate; 202. Metal spring; 203. Second metal connecting plate; 301. Second fixing rod; 302. Protective shell; 303. First driving wheel; 304. Main gear shaft; 305. Second driven wheel; 306. Slave gear shaft; 307. First fixing rod; 401. First metal fixing piece; 402. Metal rod; 403. Metal elastic damping element; 404. Second metal fixing piece. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0033] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] See also Figure 1 , this embodiment provides a submarine suspended tunnel inertia tuned mass damper, including an acceleration inertia container, a metal spring system, a damping energy dissipation system and a mass block;

[0036] like Figure 2 The metal spring system shown realizes the initial tension state of the metal spring according to the lane layer distance from the mass block to the tunnel tube; when the tunnel tube moves upward (downward), the spring stretches (compresses) to transfer the tube energy to the mass block.

[0037] like Figure 3 The acceleration inertia container shown in the figure drives the protective shell to move when the mass block and the tunnel tube body move relative to each other. Since the top and bottom of the protective shell are provided with teeth, the gears are driven to move, thereby realizing the inertial force transmission between the tunnel tube body and the mass block. This part of the inertia can replace part of the mass block mass. Preferably, the protective shell is divided into two parts, the upper and the lower parts, so as to facilitate disassembly and assembly.

[0038] like Figure 4 In the damping energy dissipation system shown, when the mass block and the tunnel tube body undergo relative motion, the metal rod and the metal elastic damping element can be compressed against each other to dissipate the energy generated by the motion.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A subsea suspended tunnel inertia tuned mass damper, characterized in that: It includes an accelerating inertia container, which is located between the lane layer of the tunnel body and the mass block; the inertia force transmission between the tunnel body and the mass block is realized through the gear transmission system inside the accelerating inertia container, and the inertia force is equivalent to part of the mass of the mass block.

2. According to claim 1, a submarine suspended tunnel inertia tuned mass damper is characterized in that: The acceleration inertia container includes a gear transmission system located in a protective shell, the gear transmission system includes more than one first driving wheel, more than one second driving wheel, more than one first driven wheel, and more than one second driven wheel. The first driving wheel is respectively meshed with the tooth track at the top of the protective shell and the first driven wheel, the second driving wheel is respectively meshed with the tooth track at the bottom of the protective shell and the second driven wheel, and the first driven wheel and the second driven wheel are meshed and connected.

3. According to claim 2, a submarine suspended tunnel inertia tuned mass damper is characterized in that: When relative movement occurs between the tunnel body and the mass block, inertial force transmission is achieved through the gear track on the top of the protective shell, the first driving wheel, the first driven wheel, the second driven wheel, the second driving wheel, and the gear track at the bottom of the protective shell, which can be equivalent to part of the mass of the mass block.

4. According to claim 3, a submarine suspended tunnel inertia tuned mass damper is characterized in that: The equivalent mass expression is: Where: is the mass of each gear; r i and r j is the diameter ratio of the driving wheel to the driven wheel.

5. According to claim 2, the inertia tuned mass damper for a submarine suspended tunnel is characterized in that: One end of the top of the protection shell is connected to a first fixing rod, and the first fixing rod is connected to the bottom of the lane layer of the tunnel tube body; the other end of the bottom of the protection shell is connected to a second fixing rod, and the second fixing rod is connected to the mass block.

6. According to claim 2, a submarine suspended tunnel inertia tuned mass damper is characterized in that: The first driving wheel and the second driving wheel are fixed to the protective housing through a main gear shaft, and the first driven wheel and the second driven wheel are fixed to the protective housing through a slave gear shaft.

7. The submarine suspended tunnel inertia tuned mass damper according to claim 1, characterized in that: It also includes a metal spring system, which is located between the lane layer of the tunnel tube body and the mass block; the metal spring system includes a metal spring arranged between a first metal connecting plate and a second metal connecting plate, the first metal connecting plate is connected to the bottom of the lane layer of the tunnel tube body, and the second metal connecting plate is connected to the mass block.

8. The inertia tuned mass damper for a submarine suspended tunnel according to claim 7, characterized in that: By adjusting the distance between the first metal connecting plate and the second metal connecting plate, the metal spring generates a tensioning force for adjusting the natural frequency of the shock absorber.

9. The inertia tuned mass damper for a submarine suspended tunnel according to claim 1, characterized in that: It also includes a damping energy dissipation system, which is located between the lane layer of the tunnel body and the mass block; the damping energy dissipation system includes a metal rod and a metal elastic damping element sleeved on the metal rod; the metal rod is connected to the bottom of the lane layer of the tunnel body through a first metal fixing piece, and the metal elastic damping element is connected to the mass block through a second metal fixing piece.

10. The submarine suspended tunnel inertia tuned mass damper according to claim 9, characterized in that: When the tunnel tube body and the mass block move relative to each other, the metal rod and the metal elastic damping element are driven to move relative to each other, and the motion energy is dissipated through the metal elastic damping element.

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