325 results about "Tuned mass damper" patented technology

The invention discloses a bridge flutter control method, device and equipment and a storage medium, and relates to the technical field of bridge wind engineering.The method comprises the steps that a kinetic equation of a bridge-tuned mass damper-nonlinear flutter coupling system is established for two-freedom-degree vertical and torsional coupling nonlinear flutter of a target bridge; the tuned mass dampers are symmetrically arranged on the two sides of the section of the target bridge girder; under the target wind speed, by calculating the time domain response of the kinetic equation, with the principle that the steady-state amplitude value of the target bridge girder is minimum, parameter optimization is conducted on the tuned mass damper, and optimized parameters are obtained; and designing the tuned mass damper based on the optimized parameters, and performing nonlinear flutter control on the target bridge through the obtained tuned mass damper. Therefore, under the nonlinear flutter control target, the coupling effect of the wind, the bridge and the tuned mass damper is considered, better tuned mass damper parameters are designed, and the method can be applied to actual engineering.

The invention discloses a parameter optimization method for a rotary inertia double-tuned mass damper and a vibration reduction system. The parameter optimization method comprises the steps that S1, a main structure motion equation comprising the rotary inertia double-tuned mass damper is constructed; s2, selecting combined variables from a design variable space of the rotary inertia double-tuned mass damper, adopting a genetic simulated annealing algorithm for each combined variable, and optimizing parameters by taking minimization of the maximum acceleration frequency response of a main structure as an objective to obtain an optimal parameter data set; s3, cleaning an optimal parameter data set based on an IQR criterion; s4, constructing a correction factor, and establishing a parameter correction factor nonlinear mapping model through tensor basis function expansion; and S5, multiplying the theoretical closed solution by the parameter correction factor to obtain design parameters of the rotary inertia double-tuned mass damper. Compared with an analytical formula design, the RIDTMD designed by using the corrected formula has the advantages that the vibration reduction efficiency is improved by about 10% at most, and the asymmetric three-peak phenomenon of a core frequency band can be effectively eliminated.

The invention discloses a large-span concrete structure construction method based on a frequency modulation mass damper, which comprises the following steps: firstly, erecting a formwork body, paving a beam bottom formwork, and then binding beam steel bars; then, profile steel embedded parts are installed, embedded lug plates are welded, and H-shaped steel beams are installed; then, a beam side mold is closed and reinforced; then, a frequency modulation mass damper is installed and welded and fixed, and a weld joint is coated with anti-corrosion and fireproof paint; construction of a structural formwork is conducted on the portion where the frequency modulation mass damper is installed; finally, concrete is poured; and after concrete pouring is completed, the formwork is removed, and construction of the large-span concrete structure with the frequency modulation mass damper is completed. The purpose of saving the construction period is achieved by improving the construction process, the project of reserving a hoisting hole is omitted by installing the damper in place in advance at a time, the risk of leakage of the structural slab due to a construction joint can be avoided, and the purpose of saving the construction period can be further achieved.

A mass damper is connected to a vacuum pump to reduce vibrations during operation. The mass damper includes a conic portion defined by a converging end and a diverging end and a damping mass connected to the converging end of the conic portion. The vacuum pump has a pump body, a vacuum inlet in fluid communication with an internal volume of a vacuum chamber, a vacuum outlet, and a rotor assembly disposed within the pump body. The rotor assembly is configured to rotate about a rotary axis to pump gas from the internal volume of the vacuum chamber out of the vacuum outlet. The conic portion may have a cone axis that is coaxial with the rotary axis of the vacuum pump.

The invention belongs to the technical field of low-frequency vibration control, and provides a low-frequency tuned mass damping device for reversely stretching a compression spring in order to solve the problem that a traditional tuned mass damper is limited in use of a vertical space due to too large net deformation of the spring under the low-frequency condition. According to the device, large compression deformation and reverse tensile deformation of the spring are fully realized in a limited vertical space in a manner of performing super-compression-reverse tensile treatment on the compression spring, relatively low rigidity required by a vibration system is achieved, low-frequency tuning can be realized in the limited vertical space of a bridge girder, and the rigidity of the vibration system is improved. The frequency application range of the tuned mass device is greatly expanded; and meanwhile, the problems that the stability problem is caused when a traditional compression spring mass body is arranged on the spring and the damping is too high and unstable due to the fact that a guide component is added are solved. The device is simple in structure, low in damping, low in space requirement and good in stability, and can be applied to vertical, lateral and torsional multi-type low-frequency vibration control of various engineering structures.

The invention discloses a tuned mass vibration damper with controllable damping, and relates to the field of vibration control of offshore wind power generation equipment structures. The mass damping unit is arranged in a suspended mode, the clamping ring is coaxially arranged, the electromagnetic damping units are evenly distributed in the circumferential direction of the clamping ring, and the electromagnetic damping units are connected with the mass damping unit through winding ropes which are arranged in a radial mode to form a multidirectional synergistic composite damping system; the mass damping unit generates reverse inertia force in vibration to restrain movement of the tower and drives the electromagnetic damping unit to act at the same time, the generator is driven to generate electromagnetic damping through the one-way bearing and the speed increaser, and lossless reset is achieved through the torsion ring. The device is integrated with an energy recovery unit, vibration energy is converted into electric energy to be stored, real-time regulation and control of damping force, omni-directional vibration response and energy feedback are achieved, and the vibration reduction efficiency and the energy utilization rate are remarkably improved.

The invention discloses a dynamic analysis model for a linear full-scale anchored floating bridge under the action of waves, which provides support for dynamic response analysis and vibration control of a large anchored floating bridge structure, and comprises the following steps: firstly, constructing a numerical model of the full-scale anchored floating bridge, and then constructing an environmental load action model; the dynamic analysis model has open source performance and good compatibility and has advantages when solving the complex multi-disaster coupling problem, and the flexible parametric modeling capability of the dynamic analysis model is also beneficial to analysis of the floating bridge structure; the invention further discloses a structural response control method for the dynamic analysis model of the linear full-scale anchored floating bridge under the wave action. According to the dynamic characteristics of the anchoring type floating bridge structure, the tuned mass dampers can be additionally arranged on the cross section of the main beam of the bridge, the vertical acceleration of the main beam of the bridge is controlled by reasonably selecting the parameters, the arrangement number and the arrangement positions of the tuned mass dampers, and therefore the driving comfort is improved.

The invention relates to the technical field of floating fans, in particular to a parameter tuning method suitable for a multi-tuned mass damper of a floating fan, which sequentially comprises the following steps of: establishing a system dynamics model; defining an optimization variable and a constraint range; constructing a comprehensive fitness function; initializing a grey wolf population and algorithm parameters; executing a grey wolf position optimization updating mechanism; setting convergence judgment conditions; and outputting the optimal TMD parameter combination. According to the method, structural dynamic characteristics and an intelligent algorithm strategy are fully fused, particularly, spatial arrangement coordinates of the TMD are brought into an optimization variable domain, collaborative design of tuning parameters and arrangement space is achieved, the method is different from a single-parameter or fixed-point optimization mode, the limitation of artificial experience layout is avoided, overall suppression of structural multi-order modal response is achieved, and the method is suitable for large-scale popularization and application. The damping capacity and the stability margin of the fan structure under wind wave flow coupling excitation are improved, cross-modal and multi-source vibration cooperative treatment is achieved on the system response coordination and control strategy level, and the method has the adaptability to offshore wind power scenes.

The invention relates to the technical field of bridge vibration reduction, in particular to a double-spring frequency conversion lever tuned mass damper device and a regulation and control method. The double-spring frequency conversion lever tuned mass damper device comprises a base, a lever, a mass block, a first spring and a second spring. Wherein the base is used for being connected with a to-be-damped structure; the middle of the lever is rotationally connected with the base; the mass block is arranged on the lever and located on one side of the base. The first spring and the second spring are located on the two sides of the base respectively, connected with the lever or abut against the lever and used for balancing the gravity of the mass block, and the first spring is located between the mass block and the base. The problems that in the prior art, when the spring end stress and the mass block end stress are amplified in a lever proportion, the pin shaft stress is too large, damping is too large, debugging is difficult, the pin shaft and a lever need to be thickened or made of special alloy, the manufacturing cost is increased, and potential safety hazards are possibly caused by material fatigue are solved.

The invention discloses a multi-eddy current tuned mass damper suitable for inhaul cable multi-mode vortex vibration control. The multi-eddy current tuned mass damper is composed of a frequency modulation mass system and two damping-adjustable plate type eddy current damping systems. Wherein the frequency modulation mass system is composed of a main steel strand, two main mass blocks, two auxiliary steel strands and four auxiliary mass blocks; the plate-type eddy current damper comprises a permanent magnet group fixed on a mass block of the frequency modulation mass system, a conductor copper plate, an L-shaped magnetic steel plate for adjusting a gap between a permanent magnet and the conductor copper plate, and an eddy current damper cable clamp. The vibration frequency and the damping ratio of each mass block of the frequency modulation mass system are continuously adjustable, and the mass blocks can be assembled on site. Due to the fact that the frequency modulation mass system comprises six mass blocks and has six tuning frequencies, efficient control over multi-mode vortex vibration of the stay cable can be achieved through the multiple eddy current tuned mass damper, in addition, the frequency and damping of all the tuned mass damper elements are continuously adjustable, and optimal control over the stay cable can be achieved.

To set specifications while suppressing antiresonance in a vibration control device having a plurality of tuned mass dampers.SOLUTION: A method for setting specifications of a vibration control device 10 having a plurality of tuned mass dampers 14 includes a step of assuming that the plurality of tuned mass dampers 14 are sequentially installed on a structural material 52, setting a natural frequency of the tuned mass damper 14 assumed to be first installed to a primary natural frequency of the structural material 52, and then obtaining a frequency of antiresonance generated by one or a plurality of tuned mass dampers 14 assumed to be previously installed; Is repeated.SELECTED DRAWING: Figure 6

The invention belongs to the technical field of vibration control, and discloses a tuned mass damping device for controlling low-frequency vertical bending vortex vibration of a large-span bridge, which consists of a fixed pulley, a mass block, a high-strength light force transmission cable, a spring, a hanging ring and a damper. Fixed pulleys and mass blocks are arranged at the positive and negative maximum displacement positions of a longitudinal bridge direction mode of a main beam respectively, a suspension system is formed by a full-length force transmission cable, and the gravity of the two mass blocks is basically balanced; the mass block is connected through the spring and is close to the bridge vibration control target frequency. When the bridge vibrates, the two mass blocks generate inertia forces which are opposite in direction but overlapped with each other, the driving system and the bridge form resonance, and therefore bridge vibration is effectively restrained. The gravity of the mass block can be self-balanced, the strength and the number of the springs are greatly reduced compared with those of a traditional TMD, any low-frequency tuning can be conducted in a vertical limited space, and the engineering cost is remarkably reduced. The device can be used for controlling vertical bending and torsional vibration of various engineering structures; the damper is replaced by an actuator, so that active control can be realized or the damper can be used as a structural excitation device.

The invention discloses a sleeve-shaped tuned mass damper mounting method based on parameter design calculation. The sleeve-shaped tuned mass damper mounting method comprises the following steps that S1, parameters of a single-column wind turbine platform and a whole machine structure are calculated; s2, calculating parameters of the sleeve-shaped tuned mass damper according to the structural parameters of the wind turbine; s3, the sleeve-shaped tuned mass damper is installed on the single-column type wind turbine platform; in the step S2, a kinetic equation is established through a kinetic analysis model, the optimal damping coefficient cd and the distance d of the translational and rotational freedom degrees are solved, and the step S2 comprises the substeps that S21, the single-column wind turbine platform and the sleeve-shaped tuned mass damper are simplified into equivalent four-freedom-degree models; s22, assuming that external excitation is a simple harmonic load, and deducing translation response and rotation response of the sleeve-shaped mass body and the single-column type wind turbine platform; s23, determining a damping tuning parameter and a frequency tuning parameter; s24, solving an optimal damping coefficient copt by a simultaneous equation in combination with a branch resonance point condition; and S25, calculating the distance d according to the rotation radius ratio rho.

The present invention provides a semi-active tuned mass damper based on intelligent materials, comprising: a passive control part, an intelligent control part, a first-stage vibration reduction part, a second-stage vibration reduction part and a health monitoring part, wherein the intelligent control part uniformly controls the first-stage vibration reduction part, the second-stage vibration reduction part and the health monitoring part; the tuned mass damper of the present invention can achieve two-way vibration control of a building structure, real-time monitor the vibration responses of the tuned mass damper and the main structure, and start the semi-active control of the intelligent materials after the computer control system collects and analyzes data.

The invention relates to the technical field of vibration evaluation, and particularly provides an airfoil structure stall flutter stability evaluation method, system and device and a medium. The airfoil structure comprises an airfoil part and a tuned mass damper, and the airfoil structure stall flutter stability evaluation method comprises the steps that a continuous state space equation of the airfoil structure is constructed based on structure parameters of the airfoil structure; based on system identification, constructing a continuous state space equation of the aerodynamic system; based on the continuous state space equation of the airfoil structure and the continuous state space equation of the aerodynamic system, constructing a state space analysis model of a coupling system; and evaluating the stall flutter stability of the airfoil structure based on the state space analysis model of the coupling system. According to the method, aeroelastic stability analysis and optimization design can be carried out on the airfoil structure with the tuned mass damper, so that the safety of the airfoil structure in the operation process is effectively guaranteed, and personal and property losses are reduced.

The embodiment of the invention discloses a vibration control method and system for a steel-concrete combined box girder bridge, and the method comprises the steps: carrying out the vehicle-bridge coupling vibration analysis through building a space finite element model which accurately considers the interface slippage and shear hysteresis effect; an initial optimal parameter group of the multi-tuned mass damper is optimized and determined based on an analysis result, and installation tuning is carried out; in the operation stage of the bridge, vibration is monitored in real time through the sensor system, parameters of the damper are dynamically adjusted by the controller according to the deviation between measured data and a target value, and self-adaptive control is achieved. Thus, high-precision simulation, optimization design and intelligent control are combined, the problem that the control effect is poor due to model simplification and fixed parameters in a traditional method is solved, and vibration suppression accuracy and environmental adaptability are remarkably improved.

The invention discloses a vibration reduction method for a reciprocating compressor unit system, and belongs to the technical field of system vibration control. The method comprises the following steps: acquiring working condition parameters under the operation condition of a reciprocating compressor unit system and time domain vibration signals of each vibration measuring point in each testing direction, and obtaining a corresponding spectrogram; establishing a mechanical vibration finite element analysis model of the system according to the design drawing information and the quality and rigidity of equipment in the system, and obtaining the distribution condition of the inherent frequency of the structure; vibration measuring points with vibration amplitudes exceeding a set limit value are recognized through the spectrogram and serve as vibration reduction positions; and corresponding tuned mass dampers are respectively designed and mounted at the vibration reduction positions according to the inherent frequency of the system for vibration reduction. According to the method, the vibration characteristics of the reciprocating compressor unit system put into use in the operation process can be analyzed, targeted vibration reduction measures are provided, and meanwhile the service life, safety and reliability of equipment of the reciprocating compressor unit system can be prolonged.

The invention relates to a bidirectional electromagnetically-driven rolling pendulum type active and passive composite tuned mass damper. The bidirectional electromagnetically-driven rolling pendulum type active and passive composite tuned mass damper comprises a sliding support and an inertia body. The sliding support is provided with a top side. A recess is formed on the top side of the sliding support. And the shape of the inner wall surface of the concave position corresponds to the whole or part of the spherical crown shape. The inertia body is at least partially contained in the concave position in a sliding mode, and the inertia body is provided with a bottom face. And the shape of the bottom surface of the inertia body corresponds to the whole or part of the spherical crown shape. And the bottom surface of the inertia body is opposite to the inner wall surface of the concave position. One of the sliding support and the inertia body is connected with a plurality of magnets, and the other one is connected with a plurality of electromagnetic windings. And when the sliding support and the inertia body slide relatively, the plurality of electromagnetic windings and the magnet form electromagnetic induction coupling. The electromagnetic control force generated by the electromagnetic winding on the magnet can increase the offset amplitude of the inertia body relative to the balance position, so that the inertia body has larger reset force relative to the sliding support, the bandwidth of the vibration reduction frequency is widened, and the vibration reduction device can adapt to the state of large load or shutdown.

A flange integrated tuned mass damper, including a main shaft structure, a plurality of wire rope isolators, and a mass ring. Flange plates are installed on the main shaft structure, and the mass ring is located below and connected to the flange plates through the plurality of wire rope isolators uniformly distributed in a circumferential direction. The plurality of wire rope isolators are uniformly distributed outside the main shaft structure in the circumferential direction, and the wire rope isolators directly carries the mass ring and are in a tensile deformation state, with both spring and damper functions. The wire rope isolators can bear tensile, compressive, rolling, and shearing loads, thus ensuring the degree of freedom of the mass ring in any horizontal direction.

The invention provides a seismic isolation structure AMD control system based on the seismic energy storage principle, and relates to the technical field of structural engineering and damping control. The bottom of the building dissipates energy through the shock insulation support and the hydraulic inerter damper, earthquake input is converted into gravitational potential energy, mechanical energy and electric energy, and the energy storage module supplies energy to the active tuned mass damper arranged on the top of the upper structure. The system monitors structural response in real time through the acceleration sensor and the force sensor, the AMD intelligent control unit calculates and outputs control force capable of reducing upper vibration and generating reverse overturning bending moment, and therefore structural vibration is restrained and the shock insulation support is prevented from being pulled under the strong shock working condition, and the overall anti-seismic performance of the shock insulation structure is remarkably improved.

The invention relates to a balance type inerter tuned mass damper and a control frequency adjusting method thereof, and belongs to the field of bridge vibration damping, the balance type inerter tuned mass damper comprises a first TMD, a second TMD and a third TMD, one end of the first TMD, one end of the second TMD and the other end of the second TMD are connected with a main beam, and the other end of the second TMD and the other end of the third TMD are connected with the same horizontal beam. The first TMD, the second TMD and the third TMD respectively comprise a first inerter, a second inerter and a third inerter; the first TMD further comprises a connecting plate parallel to the horizontal beam, and the connecting plate is connected with the horizontal beam through a vertical shaft hinge. Through coupling of a vertical system and a torsion system, the balance type inerter tuned mass damper can control vertical bending vibration and torsion vibration at the same time, and the problem that a traditional tuned mass damper is single in control mode is solved; by introducing the inerter, the static elongation of the spring under the action of movable mass gravity is reduced, and the problem that the static elongation is too large when a traditional tuned mass damper controls low-frequency vibration of a large-span bridge is solved.

The invention provides a low-frequency tuned mass damper which comprises a mass damping unit, a frequency modulation supporting unit and a fixed force transmission unit, an included angle is formed between the mass damping unit and the vibration direction of a main structure, the frequency modulation supporting unit is arranged at the bottom of the mass damping unit, and the fixed force transmission unit is connected with the main structure. The vibration frequency of the mass damping unit is adjusted by changing the recovery acceleration; the mass damping unit comprises a mass transmission part, a rotating part, an eddy current damping part and a swing part which are sequentially connected from the included angle of the mass damping unit to the bevel edge direction, and the swing part is rotationally connected to the fixed force transmission unit. The mass transmission part comprises a mass block and a rotation transmission part providing rotation acting force for the mass block, and the mass block makes contact with the rotation transmission part and is fixedly connected with the rotating piece. The invention has the advantages of solving the problem of low-frequency vibration, reducing the structural size, reducing the installation difficulty and the like.

The invention discloses a multi-pendulum-type particle tuned damper and a vibration reduction method thereof. The problems that a traditional tuned mass damper (TMD) is poor in robustness, narrow in vibration reduction frequency band and difficult to adapt to the complex and changeable vibration environment of an offshore wind power tower drum are solved. According to the damper, the supporting plate is hung through the flexible traction component to form a pendulum type tuned mass unit, the N-order inherent frequency of the pendulum type tuned mass unit is tuned to be matched with the N-order inherent frequency of a tower barrel, and efficient resonance energy absorption of main frequency vibration is achieved; meanwhile, the particle filling box is arranged on the supporting plate, the swinging type unit swings to drive particle materials to generate violent relative movement, and broadband vibration energy is widely dissipated through inelastic collision and friction. According to the application, the adaptability, the robustness and the overall vibration reduction efficiency of the damper in a severe marine environment can be remarkably improved.

The present application belongs to the technical field of low-frequency vibration control, and aims at the problem that the traditional tuned mass damper is limited in vertical space use due to the excessive spring net deformation under low-frequency conditions, and provides a low-frequency tuned mass damper device which reversely stretches the compression spring. The device fully realizes the compression large deformation and reverse stretching deformation of the spring in the limited vertical space through the way of over-compression and reverse stretching of the compression spring, so as to achieve the required low stiffness of the vibration system. The low-frequency tuning can be realized in the limited vertical space of the bridge girder, and the frequency application range of the tuned mass device is greatly expanded. At the same time, the stability problem of the traditional compression spring mass body placed on the spring and the problem of excessive and unstable damping caused by the increase of the guide component are avoided. The device has simple structure, low damping, low space requirement and good stability, and can be applied to vertical, lateral and torsional multi-type low-frequency vibration control of various engineering structures.

This invention relates to a multi-mode vortex-induced vibration control method for long-span bridges based on multiple SATMDI (Self-Active Capacitive Tuned Mass Damper) dampers, belonging to the field of structural vibration control. The invention addresses the problem of insufficient optimization in existing semi-active controlled SATMDI settings. The method comprises the following steps: Step 1: Establishing a finite element model of the bridge and extracting modal information for each order; Step 2: Screening the bridge modes, retaining modes with natural frequencies lower than the highest vortex shedding frequency; Step 3: Determining the vortex-induced vibration amplitude limits [A] for each mode requiring control. n ], and then obtain the allowable value of the peak value of the dynamic amplification coefficient of each mode of the bridge; Step 4, divide the retained modes into G groups, and obtain the sum of the minimum additional mass required for each group of modes; Repeat step 4 P times, regrouping each time, and obtain P results; Step 5, take the grouping strategy with the minimum value among the P results as the optimal grouping strategy, and obtain the minimum additional mass required to control all modes and the corresponding optimal SATMDI deployment position.

The invention provides a self-adaptive tuned mass damper and a parameter adjusting method. The self-adaptive tuned mass damper comprises a tuned mass damper body, a mass detection system, a hydraulic system and a control system. The tuned mass damper comprises a counterweight liquid container, a valve control damper and a spring; the counterweight liquid container is fixedly connected with the lower part of the machine tool workbench; the other end of the spring is connected with the counterweight liquid container; one end of the valve-controlled damper is connected with the machine tool workbench, and the other end is connected with the counterweight liquid container; the quality detection system is used for detecting the mass of the machine tool turntable main system and the mass of the counterweight liquid container; the control system is used for controlling the hydraulic system to adjust the mass of the balance weight liquid container and the damping coefficient of the valve control damper in real time according to a relation model of parameters of the self-adaptive tuned mass damper ATMD and the mass of the machine tool rotary table main system. A hydraulic system is controlled to adjust the mass of a counterweight liquid container and the damping coefficient of a valve control damper in real time according to a relation model of parameters of the self-adaptive tuned mass damper and the mass of a machine tool rotary table main system; the problems that the inherent frequency of a system is changed and the vibration reduction effect of a traditional constant-parameter tuned mass damper is invalid due to continuous reduction of the workpiece quality in cutting machining are effectively solved, the quality time-varying working condition of cutting machining of a numerical control machine tool is efficiently adapted, the machining precision is effectively improved, and the service life of machine tool parts and cutters is prolonged.

The invention discloses a cantilever beam vibration absorber and a Tokamak device, and belongs to the field of vibration control. The cantilever beam vibration absorber comprises an acoustic black hole cantilever beam which comprises an acoustic black hole structure; the piezoelectric element is located on any surface of the acoustic black hole structure in the thickness direction; the piezoelectric shunt circuit is electrically connected with the piezoelectric element; the damping layer is located on at least one side of the acoustic black hole structure in the thickness direction; the tuned mass block is located on the side, away from the acoustic black hole structure, of the damping layer. Broadband vibration reduction can be achieved, the vibration reduction frequency is flexible, accurate and adjustable, and the vibration reduction effect is effectively improved.

Tuned viscous mass damper and building structure provided with the damper, relate to building shock absorption technical field, the tuned viscous mass damper of the present application includes the flywheel of the rod-shaped component and the sleeve setting on the rod-shaped component, the motion conversion mechanism that is equipped with the cooperation between the rod-shaped component and flywheel, the motion conversion mechanism is configured as in the process of the reciprocating motion of the rod-shaped component along the axial drive flywheel to the same direction rotation.The present application can improve the reliability of tuned viscous mass damper and reduce its use cost.

The invention relates to the technical field of turbine power generation, and discloses a multi-stage integrated rotor structure of a lightweight turbine power generation all-in-one machine, which comprises a cantilever shaft, a bearing pack, an embedded piezoelectric actuator, a gas compressor rotor and a turbine rotor, the cantilever shaft is connected to the shaft end of a power generator, the embedded piezoelectric actuator is circumferentially arranged in a non-bearing area of the cantilever shaft, and the gas compressor rotor is arranged in the bearing pack. The bearing set is erected on the cantilever shaft, the turbine rotor is coaxially installed at one end of the cantilever shaft, the turbine shaft sleeve is arranged at the tail end of the turbine rotor, the compressor rotor is arranged on the turbine shaft sleeve in a sleeved mode, a sliding cavity is formed in the back of an impeller of the press rotor, and the tuned mass damper is arranged in the sliding cavity. And the tuned mass damper is in telecommunication connection with the embedded piezoelectric actuator. The weight of the rotor is remarkably reduced and the structural rigidity is enhanced through a composite lightweight structure and an integrated forming process, and vibration transmission and modal resonance under high-speed rotation are effectively suppressed by combining active magnetic suspension regulation and a multi-stage passive vibration suppression mechanism.

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.