37 results about "Tuned mass damper" patented technology

The application relates to a design method of a mass-spring damper vibration reduction structure, which can realize accurate and efficient control of specific multi-order and high-order modal responses of the structure, selects relative deformation of a mass-spring system installation position as a main degree of freedom, targets the shape of a structure deformation as a vibration mode of the structure, decouples a multi-degree-of-freedom original structure into a plurality of main degree-of-freedom systems of additional masses, calculates mass-spring system parameters required by a control target mode through an analytical expression, and determines an arrangement position. Compared with the prior art, the application can accurately reduce the response of a target mode without changing the period and vibration mode of other modes, and has the advantages of high precision, low calculation amount and easy realization.

The present application relates to the technical field of building vibration reduction, and provides a liquid tuned mass damper and a design method, wherein the liquid tuned mass damper comprises a mass block, an elastic element and an oscillation plate; one end of the elastic element can be connected to a controlled structure, the mass block is connected to the other end of the elastic element; the oscillation plate is connected to the mass block; the oscillation plate and the elastic element have an included angle in the extension direction; and the oscillation plate can be immersed in a fluid. The liquid tuned mass damper can solve the problems that the existing tuned mass damper only generates inertial mass by the mass block, a mass block with a large mass is required, and a mechanical oil pressure damping element is required, resulting in high manufacturing cost, and the mass block is too heavy to cause a large static load on the controlled structure.

The invention involves a triangular prismatic tuned mass damper suitable for large-span or cantilever structures, including a triangular prism box, particle damping units inside the triangular prism box, and a steel mass block. Below the triangular prism box are high-damping springs. The particle damping unit consists of a particle damping cavity, particles of three different sizes, and foam rubber pads. When the structural vibration amplitude is small, the particles dissipate energy by compressing the foam rubber pads and rolling. When the amplitude of structural vibration is large, the energy is dissipated by the collision of particles and the compression of the foam rubber.

This application relates to the field of flutter analysis technology, specifically providing a method, system, device, and medium for numerical simulation of stall flutter in airfoil structures. The airfoil structure of this application includes an airfoil component and a tuned mass damper. The method includes: acquiring the geometric parameters of the airfoil structure; determining the fluid region of the airfoil structure based on the geometric parameters; generating a flow field mesh based on the fluid region; acquiring the aerodynamic information of the airfoil structure at the current moment; acquiring the flutter angular displacement of the airfoil structure at the previous moment; determining the flutter angular displacement response of the airfoil structure at the current moment based on the aerodynamic information of the airfoil structure at the current moment and the flutter angular displacement of the airfoil structure at the previous moment; and updating the flow field mesh based on the flutter angular displacement response of the airfoil structure at the current moment. This application can simulate the aerodynamic characteristics and structural response of airfoils in complex flow fields, providing accurate data support for the optimized design and stall flutter analysis of airfoils.

The present application relates to a kind of stiffness and adjustable damping of cylindrical high-rise structure wind vibration control tuned mass damper and its design method, adjusting method.Ring movement mass unit is connected with chimney top by suspension unit, adjustable stiffness unit is arranged between ring movement mass unit and chimney structure, for adjusting the overall stiffness and natural frequency of tuned mass damper.Adjustable damping unit is composed of permanent magnet, magnet plate and conductive copper plate arranged on the upper surface of ring fixed support platform and the lower surface of ring movement mass unit, magnet plate on the upper surface of ring fixed support platform is equipped with lifting nut, for adjusting the distance between conductive copper plate on the lower surface of ring movement mass unit and permanent magnet plate on the upper surface of ring fixed support platform, to realize the adjustment of tuned mass damper damping parameter.The tuned mass damper involved in the present application can adjust the stiffness and damping parameter on site, to improve the wind vibration control efficiency of tuned mass damper.

The application discloses a suspension type inertial capacity enhanced tuned mass damper for high-rise chimneys, which is applied to self-standing chimneys and comprises a suspension mass ring, a suspension assembly and a universal eddy current inertial container. The suspension assembly is uniformly distributed on the outer surface of the self-standing chimney in a circumferential direction and is fixedly connected with the outer surface of the self-standing chimney. The other end of the suspension assembly is connected with the suspension mass ring. The suspension mass ring is uniformly distributed with connecting grooves in the circumferential direction. The inner wall of the connecting grooves is provided with mounting grooves on both sides. One end of the universal eddy current inertial container is connected with the suspension mass ring through the mounting grooves, and the other end is hingedly connected with the self-standing chimney. The application not only improves the damping performance of the damper and enhances the stability and reliability of the damper when responding to vibration, but also realizes the simplification of the overall material demand of the self-standing chimney by reducing the additional mass of the suspension mass ring, directly reduces the construction cost, and has a wide application range and high practicability.

The application provides a damping and wave energy recovery energy storage system for a floating wind turbine platform, and belongs to the technical field of marine power generation. The system comprises a floating wind turbine platform and a wave energy conversion device arranged in the floating wind turbine platform. The wave energy conversion device comprises a shell, a tuned mass damper, a transmission mechanism and a power generation and energy storage mechanism arranged in the shell. The tuned mass damper comprises a mass, a spring and a guide rail. The mass is slidably arranged on the guide rail. The mass is connected with the two side plates of the shell through the spring at both ends. The power generation and energy storage mechanism comprises two permanent magnet synchronous motors arranged at both ends of the mass. The mass is drivingly connected with the rotating shafts of the permanent magnet synchronous motors through the transmission mechanism. The mass is configured to reciprocate along the guide rail to drive the rotating shafts of the two permanent magnet synchronous motors to rotate in one direction to generate power. The system provided by the application can solve the problem that the prior art is difficult to consider multi-directional damping and stable power generation and energy storage.

The application belongs to the technical fields of civil engineering and machinery, and discloses a self-adaptive multi-direction tuned mass damper and a working method thereof. In the horizontal direction, the self-adaptive multi-direction tuned mass damper realizes the adjustment of the horizontal frequency and the damping ratio by adjusting the effective swing length of a suspender and the length of a high-damping impact head from a U-shaped mass block; in the vertical direction, the self-adaptive multi-direction tuned mass damper realizes the adjustment of the vertical damping force and the vertical stiffness by the interaction of a roller and a trapezoidal viscoelastic material layer and the adjustment of the angle of a spring and an upper suspension steel plate. Compared with a traditional tuned mass damper, the self-adaptive multi-direction tuned mass damper has the advantages of simple structure, low energy consumption and low cost, and can realize multi-directional vibration reduction and decoupling, adjustable self-vibration frequency, self-adjusting damping ratio and other functions, and overall improves the effect of the tuned mass damper in the vibration suppression of civil engineering structure dynamic multi-disaster.

The application provides a bidirectional vibration reduction tuned mass damper for a tower and a vibration control method. The damper comprises a damper mounting frame, a moving mass, a magnetic suspension damping assembly, an eddy current damping assembly, two sets of elastic return assemblies and two sets of horizontally oriented components arranged in cross layers, the damper mounting frame is mounted at the top of the tower; the moving mass is movably mounted in the damper mounting frame in multiple directions by the horizontally oriented components and is suspended by the magnetic suspension damping assembly arranged in the horizontally oriented components; the eddy current damping assembly is integrally mounted in the magnetic suspension damping assembly; the two sets of elastic return assemblies are connected between the moving mass and the damper mounting frame in the moving direction of the moving mass. The control method controls the current of the driver of the damper according to the real-time measurement of the severity parameter by establishing a tower-damper coupling model. The application has the advantages of good vibration reduction and inhibition effect, compact structure and the like.

The application discloses a kind of mass collides tuning mass damper device in equilibrium position, comprising: base, the base is fixed with controlled structure;Collision baffle is vertically fixed in the equilibrium position of base;Collision baffle is equipped with cushioning material in opposite two side surfaces;Two limit plates are fixed on base and symmetrically arranged on the two sides of collision baffle, and two limit plates are spaced apart from collision baffle;First mass is placed between first limit plate and collision baffle, second mass is placed between second limit plate and collision baffle, and the center line of two masses is perpendicular to collision baffle;Two masses reciprocate on the surface of base along the direction parallel to the center line thereof;Two springs are arranged one by one corresponding to two masses and two limit plates, and each spring is connected with mass and limit plate;In natural extension state of spring, mass is in contact with cushioning material on the side of collision baffle and is not forced.The application is symmetrical in structure, stable in vibration control process, reliable in damping effect, and has the advantages of simple principle, simple structure, convenient installation, wide application range, etc.

This invention discloses a tuned mass damper and a damper frequency tuning method. A single pendulum structure is used to achieve two different damper frequency adjustments. The pendulum structure includes a pendulum arm assembly and a reset pendulum block. The lower end of the pendulum arm assembly is connected to the upper end of the reset pendulum block. The lower end of the reset pendulum block is movably connected to the inside of the oscillator via a guide mechanism. Both sides of the lower end of the oscillator are slidably connected to cross-decoupling slide rails, which are fixed to a reinforcing platform. A variable damping plate is fixed to the reinforcing platform, and the variable damping plate does not contact the magnet unit. The magnet unit is detachably connected to the lower end of the oscillator. This invention allows for manual adjustment of the pendulum arm length and adjustment of the reset pendulum block mass on-site, quickly matching different fan / structure frequencies without requiring factory debugging, significantly improving adaptability to operating conditions. The frequency does not drift or decrease under large amplitude, maintaining efficient vibration reduction even under large amplitude. It is space-friendly and suitable for confined tower spaces.

The application discloses a tuned mass damper provided with constraint layer damping, which comprises a fixed part, an elastic connecting part and a mass part, wherein the mass part is connected with the fixed part through the elastic connecting part; the elastic connecting part is a thin-walled structure; at least one side of the elastic connecting part is paved with constraint layer damping; the constraint layer damping comprises more than one damping layer and more than one constraint layer, and the more than one damping layer and the more than one constraint layer are alternately stacked layer by layer. The tuned mass damper provided with the constraint layer damping can achieve the required rigidity and damping in the case of occupying a smaller space, and provides a better damping effect.

This invention provides a hybrid vibration reduction method for large-span steel space frames in wind tunnels based on TMD and viscous dampers, belonging to the field of wind tunnel technology. This invention involves installing magnetorheological elastomer variable stiffness devices and temperature-compensated viscous dampers within each tuned mass damper unit. It collects signals using triaxial accelerometers and performs frequency domain decomposition algorithm mode identification, establishing a two-layer game optimization model to output the optimal frequency distribution vector and optimal damping force distribution vector. Based on the optimization results, the stiffness coefficient and damping coefficient are adjusted using a current controller. The vibration reduction effect is evaluated using a sliding time-window power spectral density analysis method, and the optimization model is re-executed to update the control parameters based on the evaluation results. This solves the technical problem of vibration reduction failure in large-span steel space frame structures due to frequency detuning of tuned mass dampers caused by multimodal coupled vibration under wind load excitation.

The application discloses a kind of self-adapting variable frequency mass tuning damper based on array spring in the field of civil engineering structure vibration control, the damper includes mass, upper steel plate, fixed spring, multiple groups of variable spring, electromagnetic bolt, buckle stop block, accelerometer, magnetorheological viscous damper and excavated hole steel bottom plate.The fixed spring provides basic stiffness, the lower end of multiple groups of variable spring passes through bottom plate and is pre-set with multiple groups of stop buckle;The electromagnetic bolt is arranged on the bottom plate, and selectively clamps the buckle stop block at different positions by stretching and retracting, to lock the effective working number of variable spring, realize the multi-stage discrete adjustment of system stiffness.The application realizes wide-frequency vibration reduction and frequency self-adaptive tracking by parallel connection of fixed spring and array variable spring, effectively solves the problem of narrow frequency band, easy detuning and poor adaptability of traditional tuned mass damper, and is suitable for intelligent vibration reduction control of large-span bridge, high-rise building and other engineering.

The application discloses a granular damper and a design method, the granular damper comprising: a shell, the shell having a part for mounting an object to be damped; a damping structure, the damping structure comprising: a base plate and a plurality of damping plates, the plurality of damping plates being arranged in parallel and at intervals on the base plate; the plurality of damping plates being assembled in the shell through the base plate; damping particles; and the damping particles being filled in the shell. The granular damper dissipates the energy of vibration through the friction and collision between the internal damping particles, the friction and collision between the shell and the damping particles, and the damping structure arranged as a part of the granular damper, which increases the acting area of the granular damper and the damping particles, further improves the damping energy dissipation effect of the tuned mass damper, and simultaneously, due to the different lengths of the damping plates, the damping frequency range can be widened, the damping effect is improved, and the application range of the granular damper is wider.

The application relates to the field of bow and arrow equipment, in particular to an intelligent shock-absorbing bow with active tuning capability and real-time feedback mechanism. The shock-absorbing bow comprises a bow body and at least one tuned mass damper, wherein the tuned mass damper is detachably installed through a fixed interface pre-installed on the bow body; the tuned mass damper is composed of at least one counterweight, a movable base for installing the counterweight, a fixed base and a plurality of elastic coupling connectors connecting the movable base and the fixed base, the fixed base is used for being connected with the fixed interface of the bow body, the movable base is coaxially arranged with the fixed base and is elastically connected with the fixed base through the elastic coupling connectors. The shock-absorbing bow dynamically matches the vibration characteristics of the bow body through the flexibly tunable shock-absorbing core, significantly improves the energy absorption efficiency to stabilize the flight trajectory of the arrow, and synchronously integrates the vibration monitoring to provide an objective basis for technical action analysis and convert the experiential training into a data-driven mode.

The utility model discloses a kind of building structures of high-rise building arch type conversion layer, including the load-bearing wall of relative distribution, the upper floor and lower floor fixed between load-bearing wall;Arch rib is arranged between the upper floor and lower floor, and tuned mass damper is arranged between the top of arch rib and the upper floor;Symmetrically fixed in the both ends of arch rib and with the support side plate of both sides load-bearing wall resistance, prestressed tension rod is fixedly connected between both sides support side plate;Tuned mass damper is designed between arch rib and upper floor, and the reverse vibration of tuned mass damper cancels structural vibration energy, mainly for controlling wind load or the resonance of high-rise structure caused by earthquake, when arch rib is compressed, vertical force is converted into lateral force, and prestressed tension rod can pull lateral force to cancel, avoid lateral force to pass to foundation, ensure the balance of entire system, under the cooperation of above structure, it is favorable to ensure the stability of conversion layer.

The application relates to the technical field of automobile control, and discloses a parameter optimization control method for an automobile body stability system based on adaptive tuning, which comprises the following steps: collecting driving state data of an automobile; the driving state data comprises the driving speed, the steering angle and the lateral displacement of the automobile; determining the driving scene of the automobile based on the driving state data; screening the driving state data based on the driving scene to obtain reference state data at the current moment; adaptively tuning the initial control vector of the automobile based on the reference state data to obtain a target control vector; and adjusting the automobile body stability system of the automobile based on the target control vector; the automobile body stability system comprises a tuned mass damper. The scheme can meet the control requirements of the tuned mass damper.

Provided in the present invention is a pendulum-type tuned mass damper, comprising a mass unit, a pendulum arm unit and an energy dissipation unit, wherein the mass unit comprises an upper mass block and a lower mass block, the upper mass block is oscillatingly connected to a controlled structure by means of the pendulum arm unit, and the lower mass block is horizontally movably supported on the controlled structure by means of a horizontal guide assembly; and the energy dissipation unit comprises a linear damping assembly and a non-linear damping assembly, the linear damping assembly is arranged at the bottom of the lower mass block, the non-linear damping assembly comprises linear dampers symmetrically arranged on two sides of the mass unit, and the upper mass block and the lower mass block are connected to each other by means of the linear dampers. The present invention has the advantages of a reduced occupied space under the condition of the same vibration frequency and effective mass of the mass unit, a good damping effect, etc.

An electric vehicle, including a vehicle structure, four ground engaging wheels, and a suspension system operably coupling each of the four ground engaging wheels with the vehicle structure, a battery operably coupled to the vehicle structure, and an onboard battery charger in electrical communication with the battery, the onboard battery charger operably coupled to the vehicle structure by a battery charger suspension system, the battery charger suspension system including one or more dampers tuned to counteract resonance vibrations experienced by the vehicle structure.

This invention belongs to the field of vibration control technology, specifically providing a lever-type tuned mass damper with passive adaptive tuning function, including a response sensing component, a trigger driving component, and a tuned mass damping component; the tuned mass damping component includes a first mass block, a first spring, a first damper, and a lever; the trigger driving component includes a response threshold setter, a ratchet, a pawl, and a cam structure; the response sensing component includes a second mass block, a second spring, and a second damper; when vertical displacement is sensed, the response sensing component also includes a negative stiffness unit composed of a third spring, a slide, a pulley, a connecting rod, a first rotating shaft, a second rotating shaft, and a frame; when the vibration displacement of the controlled main structure exceeds the limit, without power supply or intervention, the trigger driving component will move the lever fulcrum, changing the dynamic characteristics of the tuned mass damping component by changing the lever ratio, achieving self-tuning and maintaining high vibration reduction efficiency.

This application relates to the field of vibration reduction technology for long-span bridges, and provides a vertical ultra-low frequency stacked spring viscous damping adjustable inertial capacity tuned mass vibration damper. The damper includes a mass block, a helical steel spring, a damping device, a transverse support, a sleeve, a ball screw, and a flywheel. The helical steel spring is located between the horizontal support and the base, and the damping device is located between the mass block and the base. The sleeve is rotatable and located on the transverse support, with an embedded ball screw nut. The ball screw screw passes vertically through the ball screw nut and is connected to the mass block. A base plate is located on the upper part of the sleeve. The flywheel is composed of multiple sets of mass discs of different thicknesses stacked together. The uppermost mass disc has a replaceable micro-block for frequency fine-tuning. This application can progressively reduce the operating frequency of the TMD (tunable damper) through the stacked spring and inertial capacity mass, achieving ultra-low frequency control below 0.1Hz. It has advantages such as low inertial capacity mass requirement, flexible adjustment, high frequency adjustment accuracy, low starting resistance, convenient damping ratio adjustment, and compact structural layout.

This invention belongs to the field of marine engineering and structural vibration control technology, and discloses a ball-bearing supported bidirectional active-passive tuned mass damper, which is composed of two arc-shaped tuned mass dampers with perpendicular motion directions. The inertial mass is supported on an arc-shaped base by a ball bearing assembly, cleverly converting sliding friction into low-resistance rolling friction, making the damper more sensitive to start, while maintaining a compact structure. In terms of passive control, the device dissipates energy through electromagnetic damping generated by the relative motion between the magnet assembly and the conductor plate. The integrated active control system, composed of a drive coil and a magnet assembly, can apply additional active control force to the TMD, thereby upgrading the traditional passive TMD to a higher-performance active-passive hybrid system, enhancing its adaptability and robustness to complex loads. In addition, the device adopts a non-contact electromagnetic guidance design, utilizing a figure-eight coil assembly in conjunction with a lateral magnet assembly to eliminate the friction of traditional mechanical guidance mechanisms.

The present application relates to the field of on-site preparation, handling or processing of building materials or building components, and discloses a building tower crown installation method for overcoming wind-induced vibration, which is characterized by setting column-circumference cables around a main column to resist bending of the main column, so that the main column exhibits the characteristics of a rigid structure. When wind-induced vibration occurs, the position with the largest amplitude is fixed, and then a tuned mass damper is installed at the position with the largest amplitude, so that the damper can play a more effective role, and the required volume and self-weight are greatly reduced. Because the damper is small and light, and two sets of energy dissipation systems respectively for low-frequency vibration of the main column are built by using prestressed cables and components of the tower crown itself, the building tower crown can resist wind without increasing weight. The entire building tower crown is very light, allowing the annular horse path and the damper to be pre-installed in the main column and the main column to be hoisted in sections, and then using the annular horse path and its guardrails as a work platform, without the need for additional high-altitude work platforms and protective structures.

To provide a tuned mass damper, etc., which is easily tuned to a target eigen frequency while using a viscoelastic member.SOLUTION: The present invention relates to a tuned mass damper for suppressing vertical vibration of a damping target by vertically vibrating a mass body disposed above or below the damping target while being tuned to the vertical vibration of the damping target. The tuned mass damper comprises: a viscoelastic member which is directly or indirectly provided in the damping target and supports the mass body; at least three elastic members which are provided in parallel with the viscoelastic member and disposed at positions farther from a centroid of the mass body than the viscoelastic member and support the mass body; and a spring for adjustment capable of adjusting an eigen frequency of the tuned mass damper.SELECTED DRAWING: Figure 5

The present application relates to a kind of tuned mass damper with inertial capacity, it includes mounting frame, mass block, damping device, gear, worm, first clutch device, second clutch device, first flywheel, second flywheel and elastic device.Mass block is linearly slidably arranged on mounting frame, and damping device and elastic device are all connected between mounting frame and mass block.Gear is fixedly arranged on mass block, worm is rotatably arranged on mounting frame, worm is located directly below gear, the central axis of worm is parallel to the sliding direction of mass block, first flywheel is connected the first end of worm by first clutch device, and second flywheel is connected the second end of worm by second clutch device.Mass block's reciprocating motion drives first flywheel and second flywheel to rotate, substantially reduces inertia mass demand.Worm and gear transmission are used, the reliability and stability of tuned mass damper are effectively improved, and have good control effect.Occupy small space, can be distributed in multiple locations of building.

The application provides a damping and wave energy recovery energy storage system for a floating wind turbine platform, and belongs to the technical field of marine power generation. The system comprises a floating wind turbine platform and a wave energy conversion device arranged in the floating wind turbine platform. The wave energy conversion device comprises a shell, a tuned mass damper, a transmission mechanism and a power generation and energy storage mechanism arranged in the shell. The tuned mass damper comprises a mass, a spring and a guide rail. The mass is slidably arranged on the guide rail. The mass is connected with the two side plates of the shell through the spring at both ends. The power generation and energy storage mechanism comprises two permanent magnet synchronous motors arranged at both ends of the mass. The mass is drivingly connected with the rotating shafts of the permanent magnet synchronous motors through the transmission mechanism. The mass is configured to reciprocate along the guide rail to drive the rotating shafts of the two permanent magnet synchronous motors to rotate in one direction to generate power. The system provided by the application can solve the problem that the prior art is difficult to consider multi-directional damping and stable power generation and energy storage.