128 results about "Inerter" patented technology

The invention discloses an integrated rigidity damping inerter self-control type two-stage vibration reduction hydro-pneumatic suspension and a working method in the field of automobiles, a hollow plunger extends into an upper cavity of an oil cylinder, the lower end of the hollow plunger is fixedly connected with a piston, and an upper lifting lug runner is sequentially connected with an inerter pipe, an electric control throttle valve and a large hydro-pneumatic chamber through a first hydraulic oil pipe; a lower lifting lug runner is sequentially connected with a damper and a small oil gas chamber through a second hydraulic oil pipe, a built-in rigidity control valve outer cylinder with the lower end fixedly connected with a piston is arranged in the plunger, an inner cylinder with the upper end sealed and the lower end connected with the lower lifting lug through a spherical hinge is coaxially sleeved with the outer cylinder, and three rows of holes are formed in the side wall of the inner cylinder from bottom to top. Two rows of holes are formed in the side wall of the outer cylinder from bottom to top; the flow direction of oil liquid is changed when the suspension works, a seal does not need to be arranged on a piston, a longer oil through hole is formed in an outer barrel, the safety of the control valve is improved, a wheel dynamic vibration absorber is integrated to an oil cylinder, integration is achieved, an external rigidity control valve is replaced with an internal rigidity control valve, and the size of the whole suspension is reduced.

The invention discloses a quasi-zero stiffness vibration isolator based on coupling of an inerter and a connecting rod and a parameter design method, and belongs to the technical field of vibration isolators. The quasi-zero stiffness vibration isolator comprises a connecting rod structure, a spring assembly, an inerter, a vibration isolation plate and a mounting base, the connecting rod structure comprises four connecting rods with the same length; the spring assembly comprises a connecting spring and two supporting springs; the rod pieces AB, AC, A 'B' and A 'C' are connected through hinge joints; two ends of AA'are connected with the inerter through connecting springs which are horizontally arranged in parallel; two ends of CC'are fixed on the mounting base, and two ends of BB 'are fixedly hinged on the vibration isolation plate; the BC end and the B 'C' end are connected through a vertical supporting spring; the supporting spring provides positive rigidity in the vertical direction, the connecting spring provides negative rigidity, and the inertial container amplifies the equivalent mass of the vibration isolation target through inertia so as to reduce the resonance frequency. The vibration isolator achieves low force transmissibility and displacement transmissibility under low-frequency excitation, and the adaptability and stability of the vibration isolator are enhanced.

The invention discloses a bridge electromagnetic inertial mass hybrid control damping system and an overall hybrid control method. The damping system comprises an inertial mass assembly, an electromagnetic assembly, a rigidity assembly and a corresponding parameter adjusting circuit. Wherein the ball screw system is used for converting linear translation into rotation, the inertial mass assembly is used for providing acceleration type inertial mass damping, the electromagnetic assembly is used for providing speed type electromagnetic damping, and the rigidity assembly is used for providing rigidity. In a normal operation stage, a parameter adjusting circuit is utilized, and the purpose of adjusting electromagnetic damping and rigidity values is achieved by changing circuit input, so that semi-active tuning is realized; under the action of an earthquake, circuit input is fixed, so that parameters of the damper are constant, and the anti-seismic robustness of the damper can be improved.

The invention provides a fan tuned mass inerter damper structure and a parameter design method, and belongs to the field of ocean engineering vibration reduction. The structure comprises an engineering structure, an outer sleeve, a roller, an inner sleeve, an additional mass block, four damper spring units and four inerter system units. The engineering structure is fixed with the external sleeve, and a guide rail is formed between the engineering structure and the external sleeve; the additional mass block is arranged in the center of the inner sleeve, the four inerter system units are connected with the damper spring unit and located on the same plane, the other ends of the four inerter system units are connected with the inner wall of the inner sleeve, and each inerter system unit comprises an inerter system spring, a damping unit, a first inerter unit and a second inerter unit. According to the structure, translation-rotation conversion is achieved through the inerter unit, efficient inertia synergy is achieved with small physical mass, and the load of a draught fan is relieved; the four units are symmetrically arranged to ensure omnidirectional vibration suppression; the roller guide rail reduces friction and improves response sensitivity and energy consumption efficiency; according to the parameter design method, parameters are accurately optimized, and broadband vibration reduction performance and engineering reliability are guaranteed.

The invention discloses a damping-adjustable inerter shock absorber which comprises an inerter and a magneto-rheological shock absorber, the lower end of the inerter is connected with the upper end of the magneto-rheological shock absorber, the inerter comprises a ball screw (1) and a ball nut (2), and the magneto-rheological shock absorber comprises a base, an outer cylinder barrel (4), a piston (5) and a rotating barrel (6). The upper end of the rotating cylinder (6) is fixedly connected with the ball nut (2), the piston (5) and the outer cylinder barrel (4) are both fixedly arranged on the base, the lower end of the rotating cylinder (6) is connected with the outer cylinder barrel (4) in an inserted mode, the piston (5) is located in the rotating cylinder (6), and magnetorheological gel is filled among the outer cylinder barrel (4), the piston (5) and the rotating cylinder (6). The damper has the advantages of attenuating the vibration amplitude and accelerating the attenuation rate at the same time, and has a wide damping adjustable range.

The invention belongs to the technical field of power transmission tower structure damping, and discloses an inerter particle type power transmission tower damping device with a multidirectional control effect. The inerter is introduced into the particle damper, so that the total mass of the damping device is reduced, and the light weight of the device is achieved. And in consideration of the fact that the seismic response of the power transmission tower is multidirectional motion, the arrangement mode of the particles and the inerter is optimally designed, so that the damping effect of the device is further improved. The inerter can generate inertia force opposite to the structural vibration direction, and the dynamic damping effect of the particle damper is guaranteed while the number of particles is reduced. The inerter composed of the gear and the rack is small in dead weight, compact in structure and easy to install, a power transmission mechanism has low energy loss, the gear and the rack are in rigid meshing transmission, rapid rotation of the flywheel can be achieved, the inerter has high sensitivity to sensing of earthquake response of a power transmission tower, and the inerter is suitable for popularization and application. And large rotation inertia force can be generated in a limited space.

The present application relates to a kind of three-dimensional pendulum tuning liquid inductance device, the inductance device includes tuning liquid column damper and tuning mass inductance container, tuning liquid column damper includes swing arm, ball hinge end head, swing arm connector, annular water tank and tuning liquid, swing arm one end is connected with ball hinge end head, the other end is connected with annular water tank by swing arm connector, tuning liquid is filled in annular water tank;Tuning mass inductance container is installed in the lower portion of tuning liquid column damper, ball hinge end head is connected with the structure to be damped, annular water tank swings and drives tuning mass inductance container to carry out energy consumption, the inductance device tuning period is adjustable.Compared with prior art, the present application has can control the vibration in each direction of the structure to be controlled, wide range of use;The parameters of each component can be flexibly adjusted to achieve the best damping effect, while tuning mass inductance container can realize the energy absorption of input structure with smaller space and achieve the two goals of energy dissipation and reduction of upper tuning liquid mass.

The application belongs to the technical field of structural vibration control, and relates to a mechanical-electrical clutch variable inertial damper, which is a semi-active damping device applicable to civil structures and used for inhibiting the vibration of the structure under the action of an earthquake or wind load. The device is realized by matching a mechanical inertial system, an electrical inertial system, an energy recovery control system and an active inertial mass control system. The application ensures that the device provides an inertial force in the acceleration stage of the structure and does not provide a force in the deceleration stage of the structure. The electrical inertial system can effectively reduce the design capacity of the mechanical inertial system, and in combination with the active inertial mass control system, the semi-active variable inertial control similar to bang-bang control can be realized, and in combination with the energy recovery control system, the kinetic energy of the flywheel can be recovered in the deceleration stage.

The application discloses a parameter intelligent adjustable inertial mass damper and a control method thereof, which are applied to efficient vibration control of super-long stay cables on large-span cable-stayed bridges in the field of civil engineering, and the damper is composed of an inertial mass element, a damping element, a self-power supply system and a heat dissipation system.The inertial mass element is combined with a conductor disc and a linear module through a ball screw, and the continuous adjustment of the equivalent inertial mass is realized by using a stepping motor to control the position of a sliding block; the damping element adopts an electric eddy current structure, a damping force is generated by cutting the magnetic field of a permanent magnet and an electromagnet by a rotating conductor disc, and the real-time regulation and control of the damping force are realized by adjusting the current of the electromagnet.The application realizes the real-time calculation and self-adaptive adjustment of optimal and suboptimal control parameters of a target mode by combining acceleration spectrum analysis and an optimization algorithm, and has the advantages of high power, high efficiency, compact structure, intelligent control, self-power supply and strong durability, and the vibration reduction effect of the stay cable is significantly improved.

The invention discloses a viscous inertial inhaul cable damper with self-adaptive damping parameters. The viscous inertial inhaul cable damper comprises a cable clamp, a first proportional rod, a first supporting rod, a first mass block, a first damper, an upper support and a lower support. The first proportion rod is sequentially provided with a first hinge hole, a second hinge hole, a third hinge hole and a fourth hinge hole in the length direction of the first proportion rod. The first hinge hole is hinged to the cable clamp. The second hinge hole is hinged to one end of the first supporting rod. The third hinge hole is hinged with one end of the first damper; the fourth hinge hole is hinged with the first mass block; the other end of the first supporting rod is hinged to the upper end of the upper support, and the other end of the first damper is hinged to the upper support. And the lower end of the upper bracket is connected with the upper end of the lower bracket. The technical problems that an existing inhaul cable damper is insufficient in displacement amplification capacity, complex in structure, large in size and difficult to meet the requirement for large vibration force of a long inhaul cable are solved.

The invention discloses an arch bridge rigid suspender tuned mass inertial torsion damper and an optimization design method thereof.The damper comprises a transmission disc, a dynamic damping disc, a transmission disc and an inerter disc, the transmission disc is fixedly connected with a suspender, the dynamic damping disc is rotatably connected to the suspender, a pre-pressure mechanism is arranged on the transmission disc, and the transmission disc is connected with the inerter disc; the dynamic damping disc is provided with a transmission block which is used for being connected with a pre-pressure mechanism so that rotation of the transmission disc can drive the dynamic damping disc to rotate, the transmission disc is connected to the hanging rod in a sliding mode, a plurality of first chiral metamaterial screws are connected between the transmission disc and the dynamic damping disc, and the first chiral metamaterial screws are arranged in a chiral mode. The inerter disc is rotatably connected to the hanging rod, a plurality of second chiral metamaterial screws are connected between the transmission disc and the inerter disc, and the second chiral metamaterial screws are arranged in a chiral mode. The problems that a traditional inerter is large in size, sensitive to amplitude and difficult to adapt to the degree of freedom of torsion are solved, and efficient, broadband and reliable vibration control is achieved.

The application discloses a kind of distributed drive automobile inertial suspension semi-active control optimization method in the technical field of vehicle suspension vibration isolation, and the method comprises the following working steps: step one, establishing suspension controlled model and ideal reference model;Step two, construct three-order generalized ground semi-active control rule;Step three, phase-frequency collaborative optimization and topological structure screening;Step four, distributed drive automobile inertial suspension semi-active control optimization.The application has the advantages of reducing the performance deviation between actual response and ideal model, improving road friendliness while ensuring ride comfort, and adapting to time-varying road excitation.

The large-span bridge three-dimensional vibration control composite damping system comprises a first energy dissipation assembly and a second energy dissipation assembly, the first energy dissipation assembly comprises an outer cylinder, a force transmission column, an axial inhaul cable and a radial inhaul cable, a sliding inner ring is installed on the inner side of the outer cylinder in a sliding mode, and the force transmission column is coaxially assembled in the sliding inner ring; straight radial inhaul cables which are distributed in a radial mode are arranged between the force transmission column and the sliding inner ring, axial inhaul cables which extend axially and are in a loose state are further arranged on the portions, located on the two sides of the radial inhaul cables, in the outer barrel, one end of each axial inhaul cable is connected with the force transmission column, and the other end of each axial inhaul cable is connected with a side plate on the corresponding side of the outer barrel. The axial inhaul cable and the radial inhaul cable are both made of shape memory alloy, and the second energy dissipation assembly comprises an electromagnetic inertial damper. According to the invention, the energy consumption assemblies are arranged in different dimensions, so that longitudinal, transverse and vertical multi-dimensional cooperative vibration control can be realized. In addition, by introducing a grading working strategy of the energy consumption assembly, external loads with different strengths can be controlled.

The present application relates to a kind of variable stiffness variable damping hydrodynamic inertance vibration isolation device, including cylinder, piston being movably arranged in the inside of cylinder, annular end cover being arranged in the top port of cylinder, the central axis of the piston is vertically through annular end cover;The inner peripheral side wall of the annular end cover is fixedly provided with annular end cover magneto-rheological elastomer, the inner peripheral side wall of the end cover magneto-rheological elastomer is fixedly provided with end cover electrically conductive sleeve, the inner side of the end cover electrically conductive sleeve is provided with end cover magnetic block fixed in the central axis of piston, end cover excitation coil is arranged on the end cover magnetic block and annular end cover, and the rigidity and damping of end cover magneto-rheological elastomer are controlled by the magnetic field generated by the energization of end cover excitation coil.The present application is reasonable in design, can realize the dynamic adjustment of rigidity and damping, effectively solve the problem that traditional structure is not good in vibration isolation effect when facing different frequency vibrations, and improve the practicality and universality of vibration isolation technology.

The present application relates to bridge damping technical field, specifically to a kind of super low frequency tuning lever mass inertial mass damper parameter design method, the damper includes: lever, mass, spring and inertial mass mechanism.Lever middle part is rotatably arranged on the structure to be damped, and lever is divided into power arm and resistance arm;Mass is arranged on power arm;Spring one end is connected with resistance arm, and the other end is connected with the structure to be damped;Inertial mass mechanism includes: arc rack, rotating shaft, flywheel and gear;Rotating shaft is rotatably connected with power arm;Flywheel is arranged on rotating shaft;Gear is arranged on rotating shaft, arc rack is fixedly arranged, and cooperates with gear, power arm swings, gear rotates relative to arc rack, and drives flywheel to rotate.This scheme can solve the problem that the elongation and the amount of TMD spring are increased in the prior art by using super low frequency TMD scheme, the installation space of TMD is limited, and the use cost of TMD is greatly increased, and the influence of TMD self weight on bridge structure.

The invention discloses a pendulum type tuned mass damping device based on a guide cable, a pulley block and an inerter, and belongs to the technical field of vibration control, the pendulum type tuned mass damping device comprises an upper fixing platform, a tower drum and a lower fixing platform, a mass pendulum is connected below the upper fixing platform, a pulley fixing platform is arranged at the lower end of the mass pendulum, and an upper pulley is arranged at the lower end of the pulley fixing platform; a lower pulley is arranged on the lower fixed platform, a guide cable is arranged between the upper pulley and the lower pulley, and the guide cable is connected with an inerter damper. According to the pendulum type tuned mass damping device based on the guide cable, the pulley block and the inerter, the pulley block is arranged on the mass pendulum, and the displacement of the mass pendulum is amplified and transmitted to the inerter damper connected with the guide cable through the pulley block and the guide cable on the pulley block; the lightweight design of the tuned mass damping device in a narrow space is realized through the mass amplification effect of the inerter damper, and the suppression of the vibration of the tower drum is realized through the inertia force of the mass pendulum and the damping force of the damping element.

The invention discloses a lunar rover adjustable inerter suspension device based on stepless speed change. Comprising a shell, electromagnetic windings arranged in the shell in an array mode, planetary intermediate gear fixers connected with the electromagnetic windings, a flywheel arranged in the shell, an output bevel gear connected with the flywheel, and a plurality of planetary intermediate gears arranged on the outer side of the output bevel gear and connected with the output bevel gear in a meshed mode. The planetary intermediate gear is arranged in the shell, the input bevel gear is arranged on the outer side of the planetary intermediate gear and connected with the planetary intermediate gear in a meshed mode, the lead screw is arranged below the input bevel gear and fixedly connected with the input bevel gear, the lead screw nut is arranged on the lead screw and connected with the lead screw, and fixed lifting lugs are arranged at the upper end of the shell and the lower end of the lead screw nut. The planet intermediate gear is installed on the planet intermediate gear fixing device through the gear shaft, and the electromagnetic winding is connected with the planet intermediate gear fixing device. The beneficial effects of the invention are that the method effectively makes up the defects of the prior art in the aspects of adjustment flexibility, adaptability, precision and extreme environment adaptation to the moon.

The invention provides a pulley block planetary composite damping shock absorber of an ultra-long flexible blade of a wind turbine generator and a control method of the pulley block planetary composite damping shock absorber, and belongs to the field of wind power equipment. The system comprises a pulley block, a pulley block assembly, a sun inerter device, a planet inerter device and a shell plate. When the blades swing, shimmy and twist, bending deformation of the blades is transmitted to the pulley blocks through the steel wire cables, vibration displacement is amplified, the inerter system is driven to rotate at a high speed, and under the coordination effect of the inerter effect and various damping elements, the system can convert inertia force of the inerter device into reverse damping force. And energy is efficiently dissipated through multiple paths such as oil circulation and particle collision. Through elastic connection, the planetary inerter compound system achieves adjustment of damping characteristics and broadband vibration suppression, the vibration amplitude of the fan blade is remarkably reduced, the service life of the fan blade is prolonged, and the reliability of the fan blade is improved.

The application relates to a space paddle type inertial device, which comprises a piston driving rod, a flywheel, a rotary damper and a space paddle type rotating shaft; the space paddle type rotating shaft comprises a spherical hinge, a bearing and a connecting rod which are sequentially connected; the flywheel and the rotary damper are connected with two ends of the connecting rod respectively, and the piston driving rod is connected with the spherical hinge; the flywheel and the rotary damper rotate around the same axis, the piston driving rod moves horizontally under the drive of the outside world, the flywheel and the rotary damper are driven to rotate by the space paddle type rotating shaft, and the translation of the piston driving rod is converted into the rotation of the flywheel and the rotary damper by the space paddle type rotating shaft. The rotation of the flywheel realizes mass amplification. The application realizes mass amplification, damping energy consumption, and has the advantages of simple mechanical form, flexible installation, easy implementation, high-efficiency vibration reduction, simple structure, low cost, convenient maintenance and high energy dissipation efficiency compared with the prior art.

The hydraulic inerter with the adjustable inerter coefficient comprises a cylinder body, the interior of the cylinder body is divided into a main cylinder body and an auxiliary cylinder body through a wall face with a round hole, a piston block is arranged in the main cylinder body, and piston rods are coaxially and fixedly arranged on the two end sides of the piston block. The end of one piston rod penetrates into the auxiliary cylinder body through a round hole and is connected with the auxiliary cylinder body through a spring which is coaxially connected with the piston rod, the end of the other piston rod penetrates out of the main cylinder body to the outside, reserved holes are formed in the cylinder walls, on the two end sides of the piston block, of the main cylinder body, and the two reserved holes are communicated through a tubular channel. The tubular channel is composed of a straight pipe section, a spiral pipe section and a connecting pipe. According to the hydraulic inerter with the adjustable inerter coefficient, when the excitation is continuously small, the dynamic mass of the structure is reduced by reducing the inerter coefficient; when excitation is large, large inertia force is output to assist the structure in damping by increasing the inerter coefficient.

The invention belongs to the technical field of pile foundations, and particularly relates to an assembly type vibration reduction reinforcing uplift pile based on inerter damping and a mounting method. The assembly type vibration reduction reinforcing uplift pile comprises an inerter multidirectional vibration reduction device, a first shell is arranged on the outer side of the inerter multidirectional vibration reduction device, a plurality of piston dampers are connected to the inner wall of the upper portion of the first shell through spherical hinges, a connecting plate is arranged in the first shell, and the outer wall of the connecting plate is connected with all the piston dampers through spherical hinges; the upper portion of the connecting plate is connected with an upper-layer building, the lower portion of the connecting plate is connected with an inerter damping assembly, a bottom plate is arranged below the inerter damping assembly, and the bottom plate is fixedly connected with the first shell; and an elastic component is arranged between the connecting plate and the bottom plate. The method has the advantages that damage to the structure under vibration disturbance can be reduced, the vibration control efficiency is improved, assembly type installation is convenient and fast in the construction process, and the pile body is uplift-resistant.

The application discloses a parallel hole damping-spiral tube inerter underwater damping device and belongs to the technical field of underwater vibration control. The device comprises an upper shell, a lower shell, a damping spring, an open small hole damping and an open fluid inerter. The upper shell and the lower shell are two parts in relative sliding. The damping spring and the open small hole damping are assembled in parallel to form an integral body, which together constitutes an open spring damping. The open spring damping and the open fluid inerter are connected in parallel, and the upper and lower ends of the two are respectively fixed to the upper shell and the lower shell. The open small hole damping and the open fluid inerter are both installed in the upper shell and the lower shell. The application adopts a parallel topology structure of inerter, damping and spring. The double spiral pipes and the symmetrical piston rods realize the fluid inerter effect in two directions. The small holes on the damping piston realize the speed-dependent throttling damping. The device has the characteristics of wide frequency vibration isolation, strong static load capacity, symmetrical positive and negative characteristics and deep water environment.

The invention discloses a vibration energy recovery device for a composite double-frequency-raising ball screw inerter. Comprising a shell, a ball screw arranged on the shell, a ball nut arranged on the ball screw, a dual frequency raising device connected with the ball nut, a self-disconnection device connected with the dual frequency raising device, an electromagnetic power generation element connected with the dual frequency raising device, and an elastic piezoelectric power generation element connected with the ball screw, the upper lifting lug is arranged above the ball screw, the lower lifting lug is arranged below the shell, the upper lifting lug is fixedly connected with the ball screw, the ball screw penetrates through the shell, the other end of the ball screw is connected with the elastic piezoelectric power generation element, and the lower lifting lug is fixedly installed on the shell. The vibration energy recovery device has the beneficial effects that vibration reduction and acceleration energy feedback can be considered according to different working conditions of a suspension system, and the problems that a traditional suspension vibration energy recovery device is low in energy recovery efficiency and cannot maximize the performance of a suspension are solved.

The utility model discloses a lever inertial damper facilitating adjustment of the amplification coefficient of a lever, and relates to the technical field of bridge vibration reduction. Comprising a mounting shell, a sliding block and a dowel bar, a guide rod is arranged in the mounting shell, two sets of connecting plates are arranged on the two sides of the sliding block, two sets of mounting bases are arranged on the two sides of the mounting shell, and a telescopic rod is arranged at the output end of an electric push rod. The electric push rod, the sliding block and other components are arranged, the mounting shell and the guide rod can limit and assist the sliding block in moving up and down for a proper distance in the mounting shell, the electric push rod operates, the telescopic rod can adjust the use height of the sliding block in the mounting shell up and down, and the use angle of the dowel bar is changed; therefore, the problem that the amplification coefficient of the lever is inconvenient to adjust to be matched with a damper for use is effectively solved, the adaptability of the device under different working conditions is effectively improved, and the optimal vibration control effect is provided.

The invention relates to a variable-frequency hydraulic type inerter vibration double-control system. The variable-frequency hydraulic type inerter vibration double-control system comprises a variable-stiffness unit, a displacement triggering unit, a linkage unit and an inerter damping unit. The variable stiffness unit comprises a spring group comprising a long spring and a short spring; the displacement triggering unit comprises a displacement boundary module and a triggering plate between which a triggering gap is preset; the inerter damping unit comprises a hydraulic cylinder filled with viscous damping liquid and a spiral pipe. A piston is arranged in the hydraulic cylinder in a sliding mode and provided with a damping hole. When the relative displacement is smaller than the trigger gap, only the long spring provides elastic restoring force, and the viscous damping fluid flows through the damping hole and the spiral pipe to generate damping force and inertia force; and when the relative displacement exceeds the triggering gap, the triggering plate drives the short spring to participate in work so as to provide increased elastic restoring force. The rigidity can be automatically switched according to the displacement amplitude, and wind vibration and earthquake double control is achieved.

A tuned mass damper inerter includes a counterweight, a first guide rod, a first rigid spring, a first intermediate plate, a damper element, and an inerter element. The counterweight is slidably connected to a floor slab. The first rigid spring is sleeved over the first guide rod, and two ends of the first rigid spring abut against the counterweight and one side of the first intermediate plate, respectively. One end of the damper element and one end of the inerter element are both fixedly connected to the other side of the first intermediate plate, and the other end of the damper element and the other end of the inerter element are both fixedly connected to a main structure of the floor slab. A sliding direction of the counterweight, the first guide rod, the damper element, and the inerter element are parallel to each other.

The invention discloses a rigidity softening inerter tuning damping device which comprises a mounting bottom plate, an external connecting piece, an elastic unit, a guide unit, an inerter unit and an energy consumption unit. The elastic unit comprises at least two elastic pieces, the guide unit is in linkage with the elastic unit, the inerter unit is in transmission connection with the elastic unit, and the energy consumption unit is in friction fit with the inerter unit. Under the small displacement working condition, the single elastic piece independently provides restoring force, and the guiding unit and the mass block form the tuning mass. Under the large-displacement working condition, the at least two elastic pieces are connected in series to achieve rigidity softening and adapt to rigidity degradation in the plastic stage of the main structure, the guide unit drives the inerter unit to convert axial movement into rotary movement so as to amplify the apparent mass, and meanwhile sliding friction is generated between the inerter unit and the energy consumption unit to dissipate energy. Through a cooperative mechanism of rigidity self-adaptive softening, inerter mass amplification and friction energy consumption, double-frequency vibration control in the elastic and plastic stages of the structure is achieved.

The invention discloses a gear and rack type inerter capable of eliminating backlash through double gears, and belongs to the technical field of vibration control. Comprising a base, a rack and the like. The base is divided into three lattices with the same size, the rack is installed in the middle lattice, the large gear and the flywheel are installed in the lattices on the two sides respectively, and the first bearing seat, the second bearing seat, the third bearing seat and the fourth bearing seat are fixed to the base. A first anti-backlash gear shaft supported by a first bearing seat and a second bearing seat is parallel to a second anti-backlash gear shaft supported by a third bearing seat and a fourth bearing seat, the rack is connected with the base in a sliding mode, a gear is installed on one side of the first anti-backlash gear shaft, a flywheel is installed on the other side of the first anti-backlash gear shaft, a gear is installed on one side of the second anti-backlash gear shaft, and a large gear is installed on the other side of the second anti-backlash gear shaft. The gear on the second anti-backlash gear shaft is meshed with the rack, and the large gear is meshed with the gear on the first anti-backlash gear shaft. According to the inerter, the inertia coefficient of the inerter is efficiently amplified through gear speed-up transmission, and meanwhile, the precision of gear transmission is guaranteed through the effect of the anti-backlash gear shaft.

The present application relates to a kind of adjustable three-damping for stay cable and its design method;The adjustable three-damping includes receiving component and damping component;Receiving component includes support, lever, connecting rod, receiving rod;Damping component includes support frame, magnetic negative stiffness unit, inertia flywheel, rotary eddy current damping unit and transmission assembly;The present application utilizes lever amplification principle, increases the displacement and speed input to damping component, amplifies the inertial parameter of damping component, equivalent negative stiffness coefficient, equivalent damping coefficient, which makes the present application more sensitive to small vibration, can effectively reduce vibration amplitude, applicable to some high-precision, high-efficiency damping application occasion.By changing the connection state of connecting rod and lever, the inertial parameter, equivalent negative stiffness coefficient, equivalent damping coefficient can be adjusted, and the damping performance of adjustable three-damping can be optimized;Its design method can adjust the inertial parameter, equivalent negative stiffness coefficient, equivalent damping coefficient according to needs.

The application belongs to the technical field of vibration control equipment, and particularly relates to a rotary inertia mass damping passive damping device with apparent mass self-adjustment with displacement. The rotary inertia mass damping passive damping device comprises a self-adaptive inertia mass unit, the self-adaptive inertia mass unit comprises a flywheel, the flywheel comprises a flywheel body, a rotating hole is formed through the middle part of the flywheel body, four sliding grooves are uniformly formed around the flywheel body, and a mass block is slidably connected to the sliding grooves. The application can realize self-adaptive control of structural dynamic response under different intensity excitations. The application can not only ensure that the mass block is in the initial position before each adjustment, prevent the problem of excessive initial apparent mass, ensure the mass balance of the flywheel, and avoid the problems of wear and damage during operation; the application can not only quickly find external large intensity excitation, but also quickly replace the type and weight of the mass block.