201 results about "Inerter" patented technology

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

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 provides a self-resetting liquid inerter shock insulation support. The self-resetting liquid inerter shock insulation support comprises a top plate, a middle plate, a bottom plate, a supporting ring, a flexible shock insulation body, an inerter, a resetting rod and an elastic resetting piece, the reset rod penetrates through the inerter and the middle plate, the upper end of the reset rod is connected with the top plate through an elastic reset piece, the bottom plate is provided with an arc-shaped groove, and the lower end of the reset rod is in contact fit with the arc-shaped groove; the inerter comprises a cylinder body, a spiral pipe and a piston, a sealing cavity is formed in the cylinder body, the sealing cavity is filled with working fluid, the piston divides the sealing cavity into an upper cavity and a lower cavity, the reset rod penetrates through the piston and is connected with the piston, an upper port of the spiral pipe sleeve is communicated with the upper cavity, and a lower port of the spiral pipe sleeve is communicated with the lower cavity. The inerter is implanted into the flexible shock insulation body, high static degree and low dynamic rigidity can be achieved, the shock absorption frequency band is effectively expanded, the shock insulation effect is improved, the liquid inerter can increase certain inertia mass and damping energy consumption effects for the shock insulation support, and the liquid inerter shock insulation support is simple in structure, high in durability and low in cost.

The invention relates to a self-adaptive force output and energy consumption bridge vibration and vibration control inerter tuning device, and belongs to the technical field of vibration control. Comprising a roll shaft support, a spring rod, a main inerter element, a box chamber main body, a secondary inertia flywheel, a flow guide pipe, a transmission connecting rod and a flow baffle, the main inerter element penetrates through and is arranged in the box chamber main body, the outer end of the main inerter element is connected with the spring rod, the spring rod is connected with the roll shaft support, and the roll shaft support is respectively fixed with the bottom surface of a main beam and the top of a bridge pier; in addition, the flow guide pipe is arranged in the box chamber body, a flow baffle and a transmission connecting rod are further arranged in the flow guide pipe, and the transmission connecting rod is further connected with a secondary inertia flywheel. The damping device is achieved through a hydraulic mechanism, and the damping device with the self-adaptive inerter coefficient is formed through linkage of the inerter devices in the main box chamber and the auxiliary box chamber, so that the purposes of changing the inerter coefficient in real time and damping are achieved. The shock resistance, the transmission efficiency, the energy consumption effect, the structural rigidity and the stability of a vibration reduction system can be improved.

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 damper with a parallel rotating eddy current damping device, comprising: a mounting seat comprising a bottom plate and a plurality of columns; the mass block group is supported on the bottom plate through a plurality of elastic elements and is in sliding connection with the stand column in the height direction; the screw rod is fixed on the bottom surface of the mass block group; the first damping disc comprises a first conductor plate and is fixed in the middle of the bottom plate through a supporting frame; the magnet rotating disc is arranged under the first conductor plate in parallel, and a nut arranged on the screw in a sleeving mode penetrates through the first conductor plate and is fixedly connected with the magnet rotating disc; and the second damping discs are supported at the bottom of the magnet rotating disc at intervals in the circumferential direction of the magnet rotating disc, and any second damping disc is a rolling type rotating eddy current damping device. Damping force is provided through the first damping disc and the second damping disc together, under the condition that the space size of the damper is not changed, the energy consumption density of the damper is remarkably improved, meanwhile, the inertia coefficient and the damping efficiency are improved, and the vibration suppression effect is guaranteed.

Introduced are a method, a software apparatus, an electronic device, and a storage medium for simulating inerter using finite element analysis. The method involves: acquiring structural parameters of an inerter; simulating the mechanical properties of racks on rigid rods and flywheels within the inerter using the structural parameters and a finite element platform; formulating constraint equations and transformation formula to simulate translational-rotational conversion and inertia amplification mechanism of the inerter; integrating the force and constraint information to achieve the finite element simulation of the inerter. The finite element simulation method for the inerter addresses the challenge of lacking “inerter units” and the inability to simulate inertia components in general finite element software platforms. It also overcomes the technical bottleneck of real-time dynamic coupling simulation between inerter and complex engineering structures. This may effectively promote the design, optimization, and application of inerter in the vibration control of large-scale engineering structures.

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 provides a nonlinear gear and rack type inerter damper and a using method thereof. The nonlinear gear and rack type inerter damper comprises a transmission assembly, an inerter synergistic assembly and an energy dissipation and shock absorption assembly. The transmission assembly comprises a box body, a rack and a gear mechanical group, a rack support for the rack to slide is arranged on the box body, and the rack is in meshed connection with the gear mechanical group; the inerter synergy assembly is fixed to a transmission shaft of the last stage of gear of the gear mechanical set, and the energy dissipation and shock absorption assembly is fixed to the box body and located below the inerter synergy assembly. According to the transmission assembly, external horizontal movement is converted into rotating movement of a gear and rack system of the device, the transmission ratio is increased, the mechanical efficiency is high, and energy loss can be effectively reduced; a mass block of the inerter synergistic assembly is connected with a flywheel through a spring and a threaded rod, nonlinear adjustment of the inerter can be achieved by changing the rigidity of the spring, magnets of different poles of the energy dissipation and shock absorption assembly are distributed in a staggered mode, and a closed magnetic circuit is provided for the inerter synergistic assembly.

The inerter flywheel comprises a wheel disc and a plurality of rotors, and the wheel disc comprises a plurality of guide rails in one-to-one correspondence with the rotors; the guide rails are annularly distributed at equal intervals, and the length direction of each guide rail is parallel to the radial direction; the rotors are connected to the corresponding guide rails in a sliding mode, and an extension spring is connected between every two adjacent rotors. When the rotating speed of the wheel disc changes, all the rotors move in the direction of the corresponding guide rails, meanwhile, the extension springs conduct collaborative deformation with approximately equal deformation, and therefore the dynamic characteristics and rotational inertia of the inerter flywheel are changed through collaborative regulation and control of the rigidity of the extension springs. The device is applied to the field of flywheel type inerter vibration regulation and control, the positions of the rotors are regulated and controlled through cooperative deformation of the multiple extension springs, the dynamic characteristics and rotational inertia of inerter flywheels are changed through cooperative regulation and control of the rigidity of the extension springs, synchronization of the positions of the multiple rotors is effectively achieved, and a good control rule is kept.

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 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.

The invention relates to a self-energized magnetorheological-variable inerter intelligent damper. The damper comprises a magneto-rheological cavity, a tuning cavity, a motion conversion cavity, a variable inerter cavity and an energy collection cavity which are sequentially connected in the axis direction of the damper and separated through partition plates, and the damper plays a role in stages under different excitations. The working mechanism of the self-energy-supply damper is phased control, dispersed energy harvesting and concentrated energy consumption, namely energy storage of the damper and broadband passive control are achieved under small-amplitude vibration; under large-amplitude vibration, all the cavities play a role together, energy release of the damper and active and passive hybrid control are achieved, and the magneto-rheological cavities can adaptively control the output force of the damper in stages according to the structural vibration condition. Compared with the prior art, the broadband vibration control target of the structure is achieved, the operation energy consumption of the damper can be reduced, and the double benefits of improving the control performance and reducing the operation cost are achieved.

The invention relates to an electric control device for stepless regulation of inertial parameters and an operation method thereof.The electric control device comprises two rotary tables, each rotary table comprises an intersection part located in the center of the rotary table and a plurality of branch parts which are annularly distributed at equal intervals and connected with the intersection part, and a linear moving assembly is arranged in the length direction of each branch part; the linear moving assembly is movably connected with a counterweight assembly; the motor is fixedly arranged at the intersection part and is in synchronous transmission connection with the linear moving assembly so as to control the counterweight assembly to synchronously get away from or get close to the motor to change a second rotational inertia parameter; the speed regulation box is located between the two rotating discs, the two ends of an output rotating shaft of the speed regulation box are correspondingly connected with the rotating discs respectively, and the speed regulation box is used for adjusting the rotating speed of the rotating discs to change the first rotational inertia parameter; the device is matched with the damper, two rotational inertia parameters are adjusted, inertia parameters are adjustable, and the problems that the damper only comprises a damping unit, and the inertia parameters cannot be flexibly adjusted to obtain better wind vibration control performance are solved.

The invention provides a power transmission line vibration suppression device and method based on inertial mass and electromagnetic damping. The power transmission line vibration suppression device comprises a spacer, a connecting frame, an electromagnetic damper, a balancing weight and a transmission mechanism. The electromagnetic damper comprises a permanent magnet assembly and a conductor disc for cutting magnetic induction lines, and the transmission mechanism is connected with the balancing weight and the conductor disc and used for converting reciprocating linear motion generated by the balancing weight under the vibration effect into circular motion in different rotation directions and driving the conductor disc to rotate to cut the magnetic induction lines. According to the device and the method, the balancing weight is adopted to provide directional torque for restraining torsion of the power transmission line, the balancing weight does reciprocating rectilinear motion and drives the electromagnetic damper, so that the damping effect is remarkably improved, vertical vibration energy is consumed, vibration can be rapidly stopped, vertical vibration and torsional vibration of the multi-split power transmission line are restrained at the same time, and the reliability of the device is improved. Damage to the sub-conductors, the sub-conductor spacers and the phase-to-phase spacers is avoided, and safety and stability of power supply are guaranteed.

The invention relates to a swing type self-adaptive inerter support and an inerter coefficient adjusting method.The swing type self-adaptive inerter support comprises a small flywheel, a large flywheel, a supporting support, a supporting top plate, a rod piece and a supporting rod, the small flywheel and the large flywheel are fixedly connected through the rod piece, the upper surface of the supporting support is a downwards-concave cambered surface, the curvature radius of the cambered surface is larger than the radius of the small flywheel, and the supporting top plate is fixedly connected with the supporting rod. The lower edge of the small flywheel is tangent to the upper surface of the supporting base, the rod piece is connected with the supporting rod, and the supporting rod is connected with the supporting top plate. Compared with the prior art, the inerter provided by the invention can provide a nonlinear inerter coefficient, and has the advantages of self-adaption and self-resetting characteristics, simple mechanical form, easiness in implementation and the like.

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 present invention relates to a vertical cross - layer tuned inerter damping system with geometric non - linear gain. The system includes a displacement amplification lever mechanism, a ball screw mechanism, a gear - rack mechanism, and a tuned damping mechanism connected in sequence. The displacement amplification lever mechanism and the ball screw mechanism are arranged across floors in the floor structure, and the gear - rack mechanism and the tuned damping mechanism are arranged on the structural floor. The displacement amplification lever mechanism and the tuned damping mechanism are respectively connected to the structure; the rotating lever is hinged to the displacement primary transfer rod and the connecting rod respectively; the connecting rod is hinged to the displacement secondary transfer rod, and the displacement secondary transfer rod extends into the nut; the inertial gear is rigidly connected to the nut, and the translation rod meshes with the inertial gear. Compared with the prior art, the present invention non - linearly transfers and amplifies the vertical deformation during the structural vibration process, thereby driving the inerter and the damper to operate, effectively introducing non - linear inertial mass amplification, damping enhancement, and precise modal tuning control, and significantly improving the control efficiency of the system.

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 relates to a crawling ladder suspension type magneto-rheological vibration absorption substructure and a single-pipe tower vibration reduction method.The substructure comprises a crawling ladder, a shape memory alloy spring and a magneto-rheological inerter damper which are arranged in a tower body, an in-ladder magnetic attraction piece is arranged in the crawling ladder, and an in-tower magnetic attraction piece is arranged on the inner wall of the tower body; the crawling ladder is attracted to one side of the inner wall of the tower body through magnetic attraction, the shape memory alloy spring is connected with the tower top and the crawling ladder, and the magneto-rheological inerter damper is connected with the crawling ladder and the tower bottom through inhaul cables. During normal use, the crawling ladder is adsorbed to the edge of the tower body, the shape memory alloy spring and the inhaul cable are tightened, and when abnormal vibration occurs, the shape memory alloy spring pulls the desorbed crawling ladder to return to the center of the tower body, and the shape memory alloy spring and the magneto-rheological inerter damper absorb and dissipate vibration energy. Compared with the prior art, a mass block does not need to be additionally arranged, and synergistic self-adaptive tuning vibration absorption and energy consumption are achieved.

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.