32 results about "Tuned liquid damper" patented technology

The invention belongs to the field of structural wind-induced vibration control, and relates to a design method of a novel tuned liquid damper with an inerter, which comprises the following steps: S1, respectively determining the mounting floors of a TLD device and an inerter device according to the design of a main body structure; s2, designing the effective mass, the shaking frequency and the damping ratio of the TLD according to the dynamic characteristic parameters of the controlled structure; s3, the geometric dimension and the water storage height of the TLD are designed in combination with the structural plane shape and the space limitation of the floor where the TLD is located; s4, designing an inerter coefficient beta of the inerter device in combination with the mass of the main body structure; s5, calculating the rigidity K of the linear spring element connected with the TLD and the damping coefficient C of the damping element; s6, establishing a main body structure-TLDI system motion equation, and calculating the vibration response and the vibration reduction rate of the main body structure; and S7, judging whether the novel tuned liquid damper (TLDI) with the inerter can enable the controlled structure to achieve an ideal control effect or not. Compared with TLCDI and TMDI devices of the same type, the TLCDI and TMDI device has superiority in economy and space utilization rate.

An offshore wind turbine jacket foundation capable with adjustable natural frequency and motion damping and a control method, comprising: a jacket; a tuned liquid damper system, comprising a central liquid tank communicated with seawater and distributed liquid tanks, wherein the central liquid tank and the distributed liquid tanks carry out liquid delivery through pipelines; a flow monitoring and control system configured to obtain storage information of each liquid tank by data acquisition; an acceleration data acquisition and analysis system configured to acquire acceleration data at key nodes of the jacket foundation; the pump on each pipeline is controlled based on the obtained data to realize the redistribution adjustment of the liquid storage and liquid level of each liquid tank in the damper system in a short time, and the mass distribution of the jacket structure as a whole is adjusted, so as to adjust the natural frequency and motion damping.

The utility model discloses a tuned liquid damper and vortex reduction vibration attenuation subassembly, relates to wind turbine generator vibration attenuation technical field, including fixed frame and damper water tank, fixed frame, damper platform, damper water tank fixed connection, fixed frame side is provided with fixed piece, fixed piece and fixed frame pass through fastener connection, fixed frame top is provided with pressing piece, fixed frame top is provided with the damper water tank. The pressing piece is connected with the fixing frame through a fastening piece; the damper water tank is arranged in the fixing frame, and damping liquid is contained in the damper water tank; the fixing piece can move in the horizontal direction, and therefore the damper water tank is clamped from the side face of the damper water tank. The pressing piece can move in the vertical direction so as to clamp the damper water tank from the top of the damper water tank. According to the tuned liquid damper and the vortex reduction and vibration attenuation assembly, the tuned liquid damper is fixedly connected with the inner wall of the tower drum and the damper platform, safety and stability are achieved, the set damping effect is achieved, and meanwhile disassembly, assembly and maintenance are convenient and fast.

The utility model discloses a tuned liquid damper for a chimney and a model selection method thereof, the damper comprises a plurality of damper units arranged along the periphery of the chimney, each damper unit comprises a plurality of box bodies which are arranged at intervals and used for containing damping liquid, the box bodies arranged along the circumferential direction of the chimney are separated by first separation plates, and the first separation plates are connected with the first separation plates. A plurality of damper units are arranged in the chimney, a first partition plate is arranged in the chimney, circulation holes are formed in the first partition plate, box bodies arranged in the radial direction of the chimney are separated through a second partition plate, communicating holes are formed in the bottom of the second partition plate, box bodies arranged in the longitudinal direction of the chimney are separated through a third partition plate, and the mass ratio of damping liquid in the damper units to the chimney is 1.5-2.0%. The ratio of the height of the damping liquid to the height of the damper unit is 0.3-0.4, and the distance between the circulation hole and the liquid level of the damping liquid is not larger than 0.5 time of the liquid height. According to the tuned liquid damper for the chimney and the type selection method of the tuned liquid damper, the vibration reduction performance of the chimney can be improved.

This invention discloses a semi-active vibration suppression device and its control method for hybrid-tower wind turbines, belonging to the field of wind turbine vibration control technology. The device includes a main frame, pulley system, water tank, spring, magnetorheological damper, and intelligent controller. The pulley system enables bidirectional sliding between the frames, allowing the water tank to move freely in the horizontal plane. The water tank contains antifreeze and vibration-damping fluid, forming a tuned liquid damper. The spring and magnetorheological damper are connected parallel to each other to the frame. The control method employs a strategy combining an offline sample database and online PID fine-tuning: offline, a genetic algorithm is used to optimize PID parameters under different operating conditions to build a database; online, the current operating condition is identified to match initial parameters, and a fine-tuning genetic algorithm is used to optimize the PID parameters in real time, adjusting the damping force of the magnetorheological damper. This invention integrates the semi-active adjustment capability of the magnetorheological damper with the passive vibration absorption advantage of the tuned liquid damper, achieving multi-frequency vibration suppression. It features a compact structure, fast response, and strong adaptability, effectively extending the unit's lifespan and reducing operation and maintenance costs.

The present invention provides a composite two-way adaptive liquid damper. The rectangular tuned liquid damper and the U-shaped tuned liquid column damper are connected through an electromagnetic valve, and the length of the water center line in the U-shaped tuned liquid column damper can be adjusted in real time to retune the natural vibration frequency. The telescopic rod in the drive system can operate the steel partition to separate the rectangular tuned liquid damper to achieve preliminary frequency adjustment, and then precise adjustment is achieved by the opening and closing of the electromagnetic valve. The high-damping rubber coating is applied to the outer surface of the electric gate, and the electric rotating shaft in the drive system can drive the electric gate to rotate, close the electric gate and change the contact area between the liquid in the U-shaped tuned liquid column damper and the high-damping rubber coating to change its frequency and damping ratio respectively, so as to obtain a better vibration control effect. The present invention can simultaneously control the two-way vibration of the structure in the plane and improve its safety and comfort.

This invention discloses a rotatable, actively tuned liquid damper, comprising a damper housing with a first open side and a second closed side arranged opposite each other along its height. The damper housing is filled with a tuning liquid. A base is mounted on the closed side of the damper housing. A liquid level sensor is fixed to the inner wall of the damper housing. A main structure connecting plate is used for connection to the main structure. A servo motor is mounted on the main structure connecting plate, and the output shaft of the servo motor is connected to the base to drive the damper housing to rotate with the base. A cover is mounted on the open side of the damper housing for opening / closing the damper housing. This invention can adjust the liquid level of the tuned liquid damper to avoid frequency jumps to a certain extent, thereby achieving a good vibration reduction effect.

The present invention provides a semi-active liquid damper system with variable frequency and damping, comprising: a U-shaped tuned liquid column damper, a rectangular tuned liquid damper, a pipeline connecting the U-shaped tuned liquid column damper and the rectangular tuned liquid damper, a liquid level gauge, a flow velocity gauge, a displacement gauge and a microcontroller. The semi-active liquid damper system with variable frequency and damping provided by the present invention can adjust the frequency and damping ratio of the U-shaped tuned liquid column damper and the rectangular tuned liquid damper in the system in real time, and has better energy dissipation and shock absorption performance in a wider frequency band and better real-time vibration control performance compared with traditional liquid dampers.

The application provides a three-way self-adaptive control tuned liquid damper, which comprises a liquid mass damper, a damping system, a stepping system, a connecting system and a control unit; the liquid mass damper is composed of a top water tank, a mass block and a bottom water tank; the damping system is composed of silicone oil, an iron bar and an elliptical plugboard; the stepping system is composed of a stepping motor, a stepping push-pull rod, a telescopic rod frame, a stepping telescopic rod and an electric rotary table; the connecting system is composed of a water pipe, a water pump, an electromagnetic valve and a shape memory alloy spring; the control unit can control the electric rotary table to change the angle of the elliptical plugboard, the stepping system and the connecting system to adjust the frequency, stiffness and damping of the damper in real time according to the signals of the accelerometer and the displacement meter on the structure; and the application can realize the vibration control in the Z direction, the X direction and the Y direction in the plane, and has stronger vibration control performance and structural use comfort.

The present application discloses a liquid level stable water replenishing system for a tuned liquid damper. The vibration damping water tank is fixedly installed on the top of a building. The first overflow pipe is installed on the upper side of the vibration damping water tank. The vibration damping partition net is fixedly installed between two opposite side surfaces inside the vibration damping water tank. The water level control water tank system includes a water level control water tank, a water supply pipe, a second overflow pipe, a water supply control device, and a sloshing partition net device. The second overflow pipe is installed on the upper side of the water level control water tank. The water supply control device is fixedly installed on the upper side of the water level control water tank, with one end in contact with the water level inside the water level control water tank and the other end connected to the water supply pipe. The sloshing partition net device is fixedly installed between two opposite side surfaces inside the water level control water tank. The lower part of the vibration damping water tank is communicated with the water level control water tank through a connecting pipe. The liquid level stable water replenishing system for the tuned liquid damper provided by the present application reduces the complexity of the system, improves the stability of system operation, reduces the system maintenance requirements, and fully guarantees the water depth in the water tank.

The utility model relates to a broadband vibration control double-control tuned liquid damper device with a failure protection mechanism, which comprises a double-curvature variable friction pendulum supporting unit, a vibration / vibration control unit, a vibration / vibration control unit, a vibration / vibration control unit and a vibration / vibration control unit, wherein the double-curvature variable friction pendulum supporting unit is arranged above a structure needing vibration / vibration control; the supporting steel platform is arranged above the double-curvature variable friction pendulum supporting unit; the tuned liquid damper body is arranged above the supporting steel platform, and the tuned liquid damper body is used for controlling the wind vibration response of the structure; the collision buffers are arranged at the two ends of the side face of the supporting steel platform, and the collision buffers are used for buffering and limiting under the extremely rare earthquake large-displacement working condition. Compared with the prior art, the broadband vibration control double-control tuned liquid damper device can be used for wind vibration control and has a good earthquake reduction effect, and the situation that when a rare earthquake or even an extremely rare earthquake occurs, the displacement of the damper is too large, and consequently a system fails can be avoided.

The present invention relates to the field of vibration reduction technology, and provides a tuned liquid mass damper that can replenish evaporated water by itself, comprising a first liquid container, an elastic element, and a second liquid container; one end of the elastic element is connected to the first liquid container, and the other end of the elastic element is used to connect to a controlled structure; the first liquid container can drive the elastic element to expand and contract when it moves vertically relative to the controlled structure; a movable baffle is provided in the second liquid container, and the first liquid container can drive the movable baffle to reduce the volume of the second liquid container when it rises relative to the controlled structure, thereby causing the liquid in the second liquid container to overflow into the first liquid container. The present invention solves the problem that existing tuned liquid dampers can only be used to control vibrations in the horizontal direction but not in the vertical direction, and that the liquid level needs to be monitored and the liquid needs to be replenished regularly, resulting in high operation and maintenance costs.

The embodiment of the application provides a damper, a wind turbine generator set support structure and a wind turbine generator set, the damper comprising an outer cylinder, an inner cylinder arranged in the inner part of the outer cylinder and a limiting piece; a first cavity is formed between the inner wall of the outer cylinder, the outer wall of the inner cylinder and the limiting piece, and an annular tuned liquid column damper is formed by adding damping liquid in the first cavity; a top plate is arranged in the inner part of the inner cylinder and is sealingly connected with the inner wall of the inner cylinder, a second cavity is formed between the inner wall of the inner cylinder and the top plate, and a tuned liquid damper is formed by adding damping liquid in the second cavity; a communication valve is arranged between the first cavity and the second cavity; the limiting piece is a piston structure, the outer cylinder, the inner cylinder and the limiting piece form a viscous damper, the inner cylinder provides a tuned mass for the viscous damper, a multiple tuned liquid column damping vibration reduction and load reduction device, namely a multiple universal tuned liquid column damper, is realized, the tuning frequency band of the damper is increased and can be dynamically adjusted, and the vibration reduction and load reduction effect of the damper is improved.

The invention provides a shake restraining device and a liquid storage tank. The shake restraining device comprises a baffle assembly used for being installed at a tank opening of the storage tank; the floating roof assembly floats on the liquid level in the storage tank, the floating roof assembly is filled with shake-inhibiting liquid, and a tuned liquid damper is formed through free liquid level shake of the shake-inhibiting liquid; the buffering assembly is arranged between the baffle assembly and the floating roof assembly. According to the oscillation suppression device and the liquid storage tank, oscillation energy of the liquid in the tank can be effectively consumed through the tuned liquid damper formed by the oscillation suppression liquid in the floating roof assembly, oscillation can be suppressed under the conventional working condition, great oscillation of the liquid can be greatly weakened under the resonance working condition, the impact pressure of the liquid on the tank wall is remarkably reduced, and the service life of the liquid storage tank is prolonged. The structural safety of the storage tank is guaranteed; the floating roof assembly floats on the liquid level, flow field distribution in the storage tank cannot be changed, interference on normal liquid inlet and outlet operation of the storage tank is avoided, the floating roof assembly is particularly suitable for storage scenes of high-viscosity liquid, it is ensured that the liquid conveying efficiency is not affected, and the production and operation cost is reduced.

A method for calculating the hydrodynamic coefficient of a damping component in a tuned liquid damper comprises the following steps that S11, wave height response signals of a TLD free surface are collected through a plurality of wave height meters under the action of random loads; s12, performing parameter identification on the wave height response signal by adopting a data-driven random subspace method to obtain the inherent frequency and the damping ratio of the TLD system; the method comprises the following steps of S11, establishing a TLD equivalent mechanical model, S13, establishing an inherent frequency omega T formula and a damping ratio zeta T formula of the TLD equivalent mechanical model, and S14, substituting the inherent frequency of a TLD system into the inherent frequency omega T formula for calculation to obtain an additional mass coefficient Cm of a TLD internal damping component, and substituting the damping ratio of the TLD system into the damping ratio zeta T formula for calculation to obtain a resistance coefficient Cd of the TLD internal damping component. The hydrodynamic coefficient, obtained through the method, of the damping component can be used for calculating the additional mass and the damping ratio generated by the damping component under the action of the random load and used for dynamic response analysis of an equivalent mechanical model on TLD under the action of the random load; and the method is simple and convenient, easy to implement and suitable for determining the optimal design scheme of the damping component for controlling the wind-induced vibration of the super high-rise building by the TLD.

The invention discloses a multi-tuned liquid damper for cross-wind multi-modal vibration control of a floating fan tower drum, which comprises a floating fan tower drum, and a plurality of liquid dampers are fixedly connected along the vertical direction of the floating fan tower drum; each liquid damper comprises a connecting piece, an external cavity fixedly connected with the connecting piece and internal liquid arranged in the external cavity; through liquid damper distribution multipoint cooperative tuning, each damper performs effective energy consumption on main modal response of the position where the damper is located, the amplitude of a multi-order vibration mode is remarkably restrained, and the vibration reduction effect of the whole structure is improved. According to the invention, accurate tuning and efficient energy consumption of a plurality of key vibration modes are realized, the modal amplitude of each order is effectively reduced, and the resonance phenomenon is inhibited, so that the anti-vibration performance and safety of the whole tower drum are improved, the service life of a fan system is prolonged, and the maintenance and repair cost is reduced.

The invention relates to the technical field of vibration reduction and isolation of maritime work equipment, and discloses a multidirectional constraint vibration reduction and isolation device for maritime work equipment, which comprises a mounting connecting plate, a supporting block and a base, the base is integrally formed at the bottom of the supporting block, the mounting connecting plate is fixedly mounted at the top of the supporting block, and an annular cavity is formed in the supporting block; according to the invention, the six fan-shaped sub-chambers are arranged, each fan-shaped sub-chamber is filled with liquid, and the liquid can shake in multiple directions within the range of the whole chamber, so that the multi-direction vibration damping device is adapted to irregular vibration such as rolling and pitching of marine engineering equipment, and the vibration damping effect is improved. And meanwhile, a one-way vibration reduction mode can be switched by means of an adjusting mechanism, the vibration reduction efficiency in the specific direction is improved in a targeted mode, based on the resonance principle of the tuned liquid damper, the liquid shaking frequency is matched with the inherent frequency of the platform, and the reverse inertia force directly counteracts vibration energy.

The invention discloses a composite damping shock absorption system for a floating type fan, which comprises a floating body platform which comprises an offshore floating foundation formed by a plurality of buoys and a connecting beam; the multi-mechanism cooperative damping system comprises a damping action frequency band complementary system constructed on the basis of the tuned mass resonance vibration absorption and liquid viscous flow energy consumption principle. Each buoy is provided with a tuned mass damper and a tuned liquid damper; the inherent frequency of the tuned mass damper is adjustable, so that the tuned mass damper is consistent with the frequency of a target control mode of the floating body platform; the tuned liquid damper performs broad-spectrum absorption on low-frequency broadband vibration of the floating body platform through flow shearing, eddy current and throttling loss of liquid. The composite damping shock absorption system has the advantages of being simple in structure, flexible in arrangement, efficient in control and the like, has extremely high practical application value, can provide key technical support for floating type wind power industrial engineering and has good technical economy and industrial adaptability.

The invention discloses a spring composite tuned liquid damper, a using method and a wind power blade. The spring composite tuned liquid damper comprises a damping tube, a spring, a throttling plate, a mandrel and a floating body. The damping tubes are symmetrically arranged and are connected together through the mandrel to form an annular tubular closed structure; a spring and a floating body are installed in an inner cavity of the end of each damping pipe, each damping pipe is filled with damping liquid, the damping liquid makes contact with the end face of the corresponding floating body, the two sides of the mandrel are connected with the floating bodies in series through the springs, the throttling plates are arranged in the inner cavities of the damping pipes, and the damping vibration attenuation effect is jointly achieved when the wind power blade moves. The liquid damper is used for vibration reduction of blades of a wind generating set, and the problems that an existing liquid damper is poor in damping vibration reduction effect and even cannot effectively reduce vibration under the large amplitude are solved; and meanwhile, the problem that coordination between low damping and high durability is difficult to achieve is solved, the low-frequency damping performance and the shock resistance are enhanced, and the wide-frequency-domain damping vibration attenuation performance is improved.

The utility model relates to the technical field of dampers, in particular to a tuned liquid damper of a wind driven generator, which comprises a plurality of support frames arranged in the circumferential direction of the inner side wall of a tower drum of the wind driven generator, and at least two limiting rods are arranged on the support frames at intervals; the axial direction of the limiting rods is parallel to the axial direction of the tower drum of the wind driven generator, the tuned liquid damper of the wind driven generator is clamped between the limiting rods on the two adjacent supporting frames, and the tuned liquid damper is designed to be a flat cylinder, so that the tuned liquid damper can adapt to installation in a limited space in the tower drum of the wind driven generator; and a latticed grid is arranged in the water tank, and a plurality of dampers are arranged in the tower drum in the circumferential direction, so that the damping effect is improved.

A floating platform with multi-frequency adaptive vibration damping and an offshore wind power system. The floating platform includes a platform body. An internal space of the platform body is divided by partitions to form a plurality of independent compartments. The compartments are used to hold water to form tuned liquid dampers (TLDs), so that a vibration damping effect on the platform body is achieved through the sloshing of water. The compartments form multi-order TLDs. Setting parameters of water in the compartments corresponding to the TLDs of different orders are different. The multi-order TLDs correspond to multi-order vibration frequencies of the platform body.

A calculation method for the hydrodynamic coefficients of the internal damping component of a tuned liquid damper, comprising the following steps: Step S11, under the action of a random load, respectively collect the wave height response signals of the free surface of the TLD through a plurality of wave gauges; Step S12, use the data-driven stochastic subspace method to identify the parameters of the wave height response signals to obtain the natural frequency and damping ratio of the TLD system; Step S13, establish the natural frequency ω T formula and damping ratio ζ T formula, Step S14, substitute the natural frequency of the TLD system into the natural frequency ω T formula for calculation to obtain the added mass coefficient C of the internal damping component of the TLD m , substitute the damping ratio of the TLD system into the damping ratio ζ T formula for calculation to obtain the drag coefficient C of the internal damping component of the TLD d . The hydrodynamic coefficients of the damping component obtained by the method of the present invention can be used to calculate the added mass and damping ratio generated by the damping component under the action of a random load, and for the equivalent mechanical model to analyze the dynamic response of the TLD under the action of a random load; and the method is simple and convenient, easy to implement, and applicable to the determination of the optimization design scheme of the damping component for the wind-induced vibration control of super high-rise buildings by the TLD.

The utility model discloses a vibration excitation device for a tuned liquid damper reduced scale model test, which comprises a test platform, a limiting device for limiting a test water tank is arranged on the test platform, and the test water tank is used for loading test liquid; rollers are arranged below the test platform and enable the test platform to reciprocate along a set direction; the driving device is used for driving the test platform to reciprocate according to a set frequency; the device further comprises a data acquisition device, the data acquisition device comprises a data acquisition unit, an acceleration sensor and a wave height displacement meter, the acceleration sensor and the wave height displacement meter are connected with the data acquisition unit, the acceleration sensor is installed on the test platform and used for acquiring acceleration data of the test platform, and the wave height displacement meter is installed in the test water tank and used for acquiring wave height data of the test liquid. The vibration excitation device for the tuned liquid damper reduced scale model test is used for simulating the vibration of a building structure so as to research the movement of liquid in the tuned liquid damper.

The invention discloses an aquaculture net cage based on a wind power plant, which belongs to the technical field of fusion of marine renewable energy sources and marine ranching and comprises a wind generating set, a floating platform and an aquaculture net cage unit. The interior of the floating type platform is divided into at least two independent cabins through partition plates, water in a specific proportion is injected into the cabins to form a multi-order tuning liquid damper, and multi-order vibration of the platform in the marine environment is effectively restrained. The aquaculture net cage unit is connected to the lower portion of the floating type platform, a net of the aquaculture net cage unit is of a spiral surrounding curved surface structure and is supported by a framework with the adjustable lead angle, and axial vortex is formed under the effect of natural water flow to achieve self-cleaning. The system is further provided with an intelligent bait casting unit, and bait casting strategies can be dynamically adjusted according to real-time ocean current data. By means of the integrated design, efficient fusion of offshore wind power and deep sea breeding is achieved, and the device has the advantages of being stable in structure, self-cleaning, high in bait utilization rate, self-sufficient in energy and the like.

The application relates to an adjustable composite tuning liquid damper for structural vertical vibration control, comprising a base fixedly connected to a main structure; a slide rail vertically arranged on the base; a support frame slidably connected with the slide rail and capable of sliding up and down along the slide rail; a liquid vibration unit arranged in the support frame and fixedly connected with the support frame; and a vibration control unit located between the support frame and the base, with two ends of the vibration control unit being connected with the bottom of the support frame and the upper surface of the base respectively, wherein the vibration control unit comprises a spring element and a damper element arranged in parallel. Compared with the prior art, the application considers both low-frequency tuning capability and effective damping mass, realizes adjustable parameters, and enables effective mass to fully participate, so as to meet the engineering requirements of large-scale structural vertical tuning vibration control.

The application discloses a kind of offshore wind turbine jacket foundation with adjustable natural frequency and motion damping and control method, including jacket, tuning liquid damper system, flow monitoring and control system and acceleration data acquisition and analysis system;Tuning liquid damper system includes central liquid storehouse and distributed liquid storehouse, central liquid storehouse is communicated with seawater, central liquid storehouse and distributed liquid storehouse are transported by pipeline with liquid, flow monitoring and control system obtains each liquid storehouse storage information by acquisition data, acceleration data acquisition and analysis system acquires acceleration data at key node of jacket foundation, based on the data obtained, control pump on each pipeline realizes the redistribution adjustment of the liquid volume and liquid level of each liquid storehouse of damper system in short time, adjust the mass distribution of jacket structure as a whole to adjust natural frequency and motion damping.The application has the advantages of convenient construction, convenient operation, control precision, and is suitable for long-term dynamic load as far sea wind turbine foundation form.

The utility model discloses an inerter-tuned liquid damper which comprises a water tank, one end of the water tank is fixedly connected with an inerter element, the other end of the water tank is fixedly connected with a linear spring and a damping element, the inerter element is fixedly connected with a corridor, the lower portion of the corridor is fixedly connected with a sliding support, and the sliding support is fixedly connected with the linear spring. One end of the corridor is fixedly connected to a building floor of the connected super high-rise building A, and the other end of the corridor is connected to the connected super high-rise building B in a sliding mode through the sliding support, and the water tank is connected to the connected super high-rise building B in a sliding mode. And the linear spring and the damping element are fixedly connected to a building floor of the connected super high-rise building B. Compared with the traditional TMD and TLD, the TMD provided by the utility model occupies a smaller space and is smaller in mass; the corridor and the connected super high-rise building are partially connected in a sliding mode, and overall torque damage is not prone to occurring under earthquakes or strong wind; the inerter element and the water tank are used for dissipating energy generated during wind vibration response of the building.

The invention discloses a boarding bridge, and relates to the technical field of boarding bridges. A damper base is fixedly connected to the upper portion of the frame, a plurality of hydraulic buffer rods and a middle supporting frame are rotationally connected to the upper portion of the damper base through universal joints, a top support is fixedly connected to the tops of the hydraulic buffer rods, a plurality of U-shaped water tanks are fixedly connected to the two sides of the middle supporting frame, and water is stored in the U-shaped water tanks. A water inlet is fixedly connected to the upper portion of the U-shaped water tank, a water outlet is fixedly connected to the lower portion of the U-shaped water tank, cooling water jackets are fixedly connected to the upper portions of the multiple hydraulic buffer rods, and water distribution pipes are fixedly connected to the two sides of the multiple cooling water jackets. A resonance damping system is formed through cooperation of the U-shaped water tank and the hydraulic buffer rod, a tuned liquid damper is formed when water in the U-shaped water tank shakes, and the vibration reduction effect is enhanced; meanwhile, circulating cooling water of the water supply assembly cools the hydraulic buffer rod through the cooling water jacket, and the buffer performance of the hydraulic buffer rod is kept stable. By means of the design, the dual functions of vibration reduction and cooling are achieved.

The application discloses a kind of shock absorption system and method, the shock absorption system includes pumping injection device and the pebble stratum of certain volume, pumping injection device is used to inject or pump liquid in pebble stratum, and pebble stratum is used as the foundation of building structure.The shock absorption system can change the mass of pebble stratum by pumping liquid to closed pebble stratum, realize the adjustment of pebble stratum inertia force size and the adjustment of self-vibration frequency, play the resonance effect and liquid sloshing friction energy dissipation through the movement of pebble stratum, reduce the vibration response of building structure, greatly improve the shock absorption energy dissipation efficiency of system, effectively reduce earthquake disaster, also can avoid sand liquefaction phenomenon under the earthquake action of natural pebble stratum;It can directly utilize the characteristics of natural pebble stratum, realize the device of tuning liquid damper shock absorption effect, and be applicable to different foundation conditions, construction is convenient, with good energy dissipation effect, the shock absorption system has pioneering engineering significance and practical value.