Coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance unit and super foundation

Abstract

The present invention relates to a coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance unit and super foundation, wherein a driving outer cylinder is sleeved on a screw, a nut and a driving gear are sleeved on the screw, the driving gear is fixedly connected to the nut, the driving gear is meshed with a first counter-rotating gear and a second counter-rotating gear, the second counter-rotating gear is sleeved on a central shaft through a second rotating cylinder and fixedly sleeved on the second rotating cylinder, the first counter-rotating gear is sleeved on a central shaft through a first rotating cylinder and fixedly sleeved on the first rotating cylinder, the first rotating cylinder and the second rotating cylinder are arranged inside and outside, the central shaft is fixedly connected to the base, the first inertia disk is fixedly connected to the first rotating cylinder, the second inertia disk is fixedly connected to the second rotating cylinder, an energized coil is provided between the first inertia disk and the second inertia disk, the energized coils are arranged in pairs and fixedly connected to the inertia disks. Compared with the prior art, the present invention achieves flexible adjustment of structural stiffness, absorption and dissipation of vibration energy, and maximum utilization of energy consumption efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of civil engineering and relates to a coaxial counter-rotating gear set type inertia capacity damping negative stiffness ternary resonance unit and a super foundation. Background Art

[0002] Among products and technologies with negative stiffness effects, most are only able to achieve a single negative stiffness effect, struggling to simultaneously achieve both inertia and damping behavior, and unable to provide multi-level tuning and vibration energy dissipation capabilities. Mechanisms for achieving negative stiffness that simultaneously incorporate inertia, negative stiffness, and energy dissipation effects require further exploration. Furthermore, once existing products are manufactured, the mechanical properties of the device are essentially fixed, making flexible adjustments difficult.

[0003] Among products and technologies that exhibit inertial capacitance, while inertial capacitance also possesses dynamic negative stiffness effects and tuning capabilities, the negative stiffness it generates is highly dependent on the external excitation frequency, making the negative stiffness effect unstable. Furthermore, inertial capacitance itself does not provide damping, making it difficult to help the structure dissipate vibration energy. Further exploration is needed to broaden the system's vibration control frequency band using the tuning function of the inertial capacitance and to enhance negative stiffness by utilizing the dynamic negative stiffness it can generate, thereby forming a control system where inertial capacitance, damping, and negative stiffness work in synergy. Furthermore, given the difficulties in achieving low-frequency band gaps in local resonant metamaterials and the challenges of elastic wave attenuation within the band gap, there is an urgent need to develop new local resonant metamaterials with inertial mass enhancement and ultra-damping enhancement.

[0004] Patent CN111173157A discloses a modular self-balancing inertia damper. Transmission gears, adapter plates, and screw nuts are symmetrically arranged on both sides of the forward and reverse screws from the middle to the end. The transmission gear is rotatably mounted on the screw nut connected to the forward and reverse screws through the adapter plate and rotates with the screw nut. Two support bearings are respectively mounted on the two ends of the forward and reverse screws and connected to the screw nuts as fixed supports of the damper; the bearing plate support is located in the middle of the forward and reverse screws, and the upper main gear and the lower main gear are respectively arranged on the central bearing on the upper part of the bearing plate and under the central bearing on the lower part of the bearing plate, and are respectively connected to the central bearing and the bearing plate by bolts. However, the device described in this patent can only generate inertial capacitance behavior and damping behavior, and cannot generate negative stiffness behavior; according to the operating principle of the device, its application of electromagnetic force is mainly to generate eddy current damping and offset the screw torque to maintain balance. It does not have the ability to generate electromagnetic negative stiffness and therefore does not have multi-stage tuning function; this patent does not have internal vibration degrees of freedom and additional local resonant mass, which weakens the deformation amplification and energy absorption efficiency of the local resonant mass under small deformation conditions. On the other hand, this patent lacks enhanced energy-consuming units under small deformation conditions, and cannot achieve deformation amplification of the energy-consuming units, making it difficult to quickly dissipate the absorbed energy. In addition, the device described in this patent can only be used as an independent control device in structural vibration control applications. Although it has a certain vibration reduction capability in the frequency domain, it cannot form a local resonance system or achieve a low-frequency bandgap to completely block the transmission of elastic waves.

[0005] Patent CN112160438A discloses a magnetic screw-type eddy current damper with a negative stiffness nonlinear energy sink, including a spring mass system, an inertial mass system, an eddy current damping system, a negative stiffness system and a support system; the spring mass system includes a spring and a counterweight, the inertial mass system includes a flywheel, a magnetic screw nut pair and a magnetic levitation thrust bearing, the eddy current damping system includes a straight permanent magnet, a conductor plate and a back iron, the support system includes a guide rod, a support bracket and an outer frame, and the negative stiffness system includes a group of permanent magnets with different names and / or a group of permanent magnets with the same name. Although this patent uses a ball screw mechanism and an eddy current mechanism to achieve inertia, negative stiffness and damping, its main technical innovation lies in the introduction of a negative stiffness nonlinear energy well, which can realize the collection of vibration energy; the electromagnetic system parameters introduced in this patent are constants, which can only achieve a fixed negative stiffness value and cannot be adjusted according to actual conditions; this patent does not have internal vibration degrees of freedom and additional local resonant mass, which weakens the deformation amplification and energy absorption efficiency of the local resonant mass under small deformation conditions. On the other hand, this patent lacks an enhanced energy-consuming unit under small deformation conditions, and cannot achieve deformation amplification of the energy-consuming unit, making it difficult to quickly dissipate the absorbed energy. In addition, although the device described in this patent has a certain vibration reduction capability in the frequency domain, it cannot form a local resonant system and achieve a low-frequency bandgap to completely block the transmission of elastic waves. Summary of the Invention

[0006] The purpose of the present invention is to overcome at least one of the defects of the above-mentioned prior art and to provide a coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance unit and super foundation. The present invention realizes flexible adjustment of structural stiffness, absorption and dissipation of vibration energy, and maximum utilization of energy consumption efficiency.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] One of the technical solutions of the present invention is to provide a coaxial counter-rotating gear set type inertia capacity damping negative stiffness three-element resonance unit, the three-element resonance unit includes a ball screw starter, a coaxial counter-rotating gear set, an inertia disk set, a damping negative stiffness unit and a fixed seat.

[0009] The ball screw starter includes a screw, a nut, a driving gear and a driving outer cylinder. The driving outer cylinder is connected to the outside world as a driving end and is sleeved on the screw. The nut and the driving gear are sleeved on the screw. The driving gear is fixedly connected to the nut and rotates with the nut.

[0010] The coaxial counter-rotating gear set includes a first counter-rotating gear and a second counter-rotating gear, and the driving gear is engaged with the first counter-rotating gear and the second counter-rotating gear.

[0011] The second counter-rotating gear is sleeved on the central shaft through the second rotating cylinder. The second counter-rotating gear is fixedly sleeved on the second rotating cylinder and rotates together with the second rotating cylinder.

[0012] The first counter-rotating gear is sleeved on the central shaft through the first rotating cylinder. The first counter-rotating gear is fixedly sleeved on the first rotating cylinder and rotates together with the first rotating cylinder.

[0013] The first rotating cylinder and the second rotating cylinder are arranged inside and outside the cylinder, and the first counter-rotating gear and the second counter-rotating gear rotate around the central axis.

[0014] The fixing seat includes a base, the central axis is fixedly connected to the base, and the base is connected to the outside world.

[0015] The inertia disk assembly includes a first inertia disk and a second inertia disk. The first inertia disk is fixedly connected to the first rotating cylinder and rotates together with the first rotating cylinder. The second inertia disk is fixedly connected to the second rotating cylinder and rotates together with the second rotating cylinder.

[0016] The damping negative stiffness unit includes an energized coil, which is provided between the first inertia disk and the second inertia disk. The energized coils are arranged in pairs, one of which is fixedly connected to the first inertia disk and the other is fixedly connected to the second inertia disk.

[0017] The screw and nut form a ball screw mechanism, which converts the horizontal movement of the screw into the rotational movement of the nut. The horizontal displacement of the screw is further converted into the rotation of the drive gear through the fixed connection between the nut and the drive gear, thereby driving the coaxial counter-rotating gear set to work;

[0018] A pair of coaxial counter-rotating gears drive their respective rotating shafts to rotate in opposite directions, thereby driving the inertia disk fixed on the rotating shaft to rotate in opposite directions;

[0019] The rotation of a pair of coaxial counter-rotating gears produces a first-order inertial behavior, and the rotation of a pair of counter-rotating inertia disks produces a second-order inertial behavior.

[0020] At the same time, the energized coil works together with the inertia disk to generate eddy current damping, thereby realizing a three-element resonance unit in which inertia capacity, damping and negative stiffness work in coordination.

[0021] As a preferred technical solution, the driving outer cylinder is sleeved on one end of the screw rod, and the nut and the driving gear are sleeved on the other end of the screw rod.

[0022] As a preferred technical solution, the other end of the screw rod is provided with an external thread, and the nut is provided with an internal thread.

[0023] As a preferred technical solution, two sides of the driving gear are respectively engaged with the first counter-rotating gear and the second counter-rotating gear.

[0024] As a preferred technical solution, the second counter-rotating gear is sleeved on the lower end of the central shaft through the second rotating cylinder, and the second counter-rotating gear is fixedly sleeved on the lower end of the second rotating cylinder.

[0025] The first counter-rotating gear is sleeved on the lower end of the central shaft through the first rotating cylinder, and the first counter-rotating gear is fixedly sleeved on the lower end of the first rotating cylinder.

[0026] As a preferred technical solution, the lower end of the central shaft is fixedly connected to the base.

[0027] As a preferred technical solution, the second rotating cylinder is wrapped around the central axis, and the second rotating cylinder is connected to the central axis through a rotating bearing and rotates around the central axis.

[0028] The first rotating cylinder is wrapped around the second rotating cylinder. The first rotating cylinder is connected to the second rotating cylinder through a rotating bearing and rotates around the second rotating cylinder.

[0029] As a preferred technical solution, the first counter-rotating gear and the first inertia disk are arranged inwardly, and the second counter-rotating gear and the second inertia disk are arranged outwardly.

[0030] Furthermore, the ball screw starter further includes a first tuning spring. The first tuning spring is provided in the driving outer cylinder, and the driving outer cylinder is connected to the screw through the first tuning spring.

[0031] As a preferred technical solution, the inner wall of the driving outer cylinder is connected to one end of the lead screw via a first tuning spring.

[0032] Furthermore, the fixing seat includes a first constraint fixing seat, one end of which is rotated to connect with a nut, and the other end is fixedly connected to the base;

[0033] The first counter-rotating gear is engaged with the driving gear and the supporting gear, and the second counter-rotating gear is engaged with the driving gear and the supporting gear;

[0034] The fixing seat also includes a second constraint fixing seat, the supporting gear is sleeved on the fixed rotating shaft, one end of the second constraint fixing seat is fixedly connected to the fixed rotating shaft, and the other end is fixedly connected to the base, the supporting gear rotates around the fixed rotating shaft, and the fixed rotating shaft itself does not rotate.

[0035] As a preferred technical solution, the upper end of the first constraint fixing seat is rotated to connect with a nut, and the lower end is fixedly connected to the base.

[0036] As an optimal technical solution, a step is provided on the nut, and a pair of thrust bearings are provided at the connection between the first constraint fixing seat and the nut. The step of the nut is constrained between the pair of thrust bearings to constrain the horizontal and vertical displacements of the nut, but not the rotation of the nut.

[0037] As a preferred technical solution, both sides of the first counter-rotating gear are respectively engaged with the driving gear and the supporting gear at the top, and both sides of the second counter-rotating gear are respectively engaged with the driving gear and the supporting gear at the bottom.

[0038] As a preferred technical solution, the upper end of the second constraint fixing seat is fixedly connected to the fixed rotating shaft, and the lower end is fixedly connected to the base.

[0039] Furthermore, the inertia disk is a composite material inertia disk, comprising a main disk and a secondary disk that are fixedly connected. The main disk and the secondary disk move together. The main disk is made of steel or copper, and the secondary disk is made of copper or silver. The conductivity of the main disk does not need to be very good, and it mainly serves to provide mass and fix the secondary disk. The conductivity of the secondary disk should be relatively high. Better conductivity can better generate eddy current damping.

[0040] The first inertia disk includes a first main disk and a first sub-disk, and the second inertia disk includes a second main disk and a second sub-disk. The first sub-disk and the second sub-disk are arranged inward, and the first main disk and the second main disk are arranged outward. The reason why the sub-disk is arranged inward is that it is closer to the energized coil, the magnetic induction intensity is higher, and the efficiency of generating eddy current damping is higher.

[0041] Furthermore, the damping negative stiffness unit also includes a pre-stressed spring. A pre-stressed spring is provided between the first inertia disk and the second inertia disk. The two ends of the pre-stressed spring are respectively fixedly connected to the first inertia disk and the second inertia disk. The pre-stressed spring deforms with the reverse rotation between the first inertia disk and the second inertia disk. The deformation of the pre-stressed spring produces nonlinear negative stiffness behavior.

[0042] As a preferred technical solution, both ends of the preload spring are fixedly connected to the first sub-disk and the second sub-disk respectively, and one of the paired energized coils is fixedly connected to the first sub-disk, and the other is fixedly connected to the second sub-disk.

[0043] As a preferred technical solution, when the ternary resonance unit is in a balanced position, the pre-stressed spring remains vertical, and the paired energized coils are on a vertical line;

[0044] The counter-rotating pair of inertia disks drives several pre-loaded springs fixed in the inertia disks to deform, and at the same time drives several pairs of energized coils fixed in the inertia disks to cause relative displacement.

[0045] Furthermore, the magnetic poles of the energized coils arranged in pairs are the same or opposite. If the energized coils that undergo relative displacement are relative to each other with the same magnetic poles, nonlinear softening negative stiffness behavior is generated. If the energized coils that undergo relative displacement are relative to each other with different magnetic poles, nonlinear softening positive stiffness behavior is generated. The reason is that, in the equilibrium position, the distance between the magnetic poles of the energized coils is the smallest, and the stiffness generated by the interaction between the two is the strongest. After the inertia disk undergoes relative rotation, the distance between the magnetic poles of the energized coils increases, and the stiffness generated by the interaction between the two will weaken, that is, the stiffness softens and weakens as the displacement increases.

[0046] As a preferred technical solution, the magnetic poles and magnetic force of the energized coil are adjusted by a current controller, thereby achieving time-varying adjustment of the overall positive stiffness, negative stiffness, and quasi-zero stiffness of the ternary resonance unit.

[0047] As a preferred technical solution, the magnetic pole position and magnetic force of the energized coil pair are adjusted by the current regulator to adjust the direction and magnitude of the current. The ratio of the relative arrangement of the same magnetic poles and the relative arrangement of the opposite magnetic poles in the energized coil pair should be selected according to actual needs. Positive stiffness, negative stiffness or quasi-zero stiffness can be achieved by changing the relative arrangement ratio or the magnetic force.

[0048] One of the technical solutions of the present invention is to provide a coaxial counter-rotating gear set type inertia capacity damping negative stiffness three-element resonance method, which uses the three-element resonance unit to resonate, including the following steps:

[0049] When the driving outer cylinder starts to move from the equilibrium position, the first tuning spring drives the lead screw to move in the same direction, while amplifying the deformation of the driving outer cylinder;

[0050] When the screw moves, it drives the nut to rotate, and then drives the driving gear to rotate in the same direction;

[0051] The rotation of the driving gear will drive the first counter-rotating gear to rotate, and drive the second counter-rotating gear to rotate in the reverse direction;

[0052] The first counter-rotating gear and the second counter-rotating gear rotating in opposite directions will produce a first-order inertial behavior;

[0053] The first counter-rotating gear drives the first rotating cylinder to rotate in the same direction, thereby driving the first inertia disk to rotate in the same direction;

[0054] The second counter-rotating gear drives the second rotating cylinder to rotate in the same direction, thereby driving the second inertia disk to rotate in the same direction;

[0055] The rotation of the first inertia disk and the second inertia disk will produce a secondary inertia behavior;

[0056] The counter-rotation between the first inertia disk and the second inertia disk will cause the preload spring to deform, resulting in nonlinear negative stiffness behavior;

[0057] In addition, it will also cause the energized coil pair originally in a vertical line to shift;

[0058] If the powered coil pair has the same magnetic poles facing each other, that is, the magnetic pole of the upper end of the powered coil connected to the first inertia disk is consistent with the magnetic pole of the lower end of the powered coil connected to the second inertia disk, the powered coil pair will produce nonlinear negative stiffness behavior;

[0059] If the energized coil pair has opposite magnetic poles, nonlinear positive stiffness behavior will occur;

[0060] At the same time, the energized coil pair, the first inertia disk, and the second inertia disk together form an eddy current damper, generating energy dissipation behavior.

[0061] One of the technical solutions of the present invention is to provide a meta-foundation, which includes multiple groups of the above-mentioned ternary resonance units and resonance masses, wherein the ternary resonance units are connected to the resonance masses through a driving outer cylinder, and the ternary resonance units are combined with resonance masses of different forms to form local resonance units, which further constitute a metamaterial foundation;

[0062] Combining the ternary resonance unit with the resonant mass, tuning spring, etc. further forms a local resonance cell, and then forms a super foundation, which is conducive to achieving a low-frequency bandgap and isolating the transmission of vibration in the super foundation.

[0063] Furthermore, the resonant mass adopts a grooved hollow rigid resonant mass, a cavity is opened in the grooved hollow rigid resonant mass, the ternary resonant unit is placed in the cavity, a first pulley is provided between the base and the cavity, and the ternary resonant unit slides in the grooved hollow rigid resonant mass;

[0064] The driving outer cylinder is fixedly connected to the cavity;

[0065] The grooved hollow rigid resonant mass is placed on the ground, and a second pulley is provided between the grooved hollow rigid resonant mass and the ground, sliding on the ground;

[0066] A top groove is provided on the top of the grooved hollow rigid resonant mass, and the bottom of the top groove is provided as a friction surface;

[0067] A friction sliding mass is placed on the friction surface, and the friction sliding mass is connected to the top groove through a second tuning spring;

[0068] The friction sliding mass is fixedly connected to the upper structure, moves with the upper structure, and supports the upper structure, and the bottom also slides on the friction surface;

[0069] The three-element resonance unit, the slotted hollow rigid resonance mass, the friction sliding mass, the second tuning spring, and the friction surface together constitute a resonance cell, and a plurality of resonance cells are combined to form a superbase.

[0070] As a preferred technical solution, the ternary resonance unit is placed at the bottom of the cavity, and a first pulley is provided between the base and the bottom of the cavity.

[0071] As a preferred technical solution, the driving outer cylinder is fixedly connected to the side wall of the cavity.

[0072] As a preferred technical solution, a second pulley is provided between the bottom of the grooved hollow rigid resonant mass and the ground.

[0073] As a preferred technical solution, the friction sliding mass is connected to the side wall of the top groove through a second tuning spring.

[0074] As a preferred technical solution, the top of the friction sliding mass is fixedly connected to the superstructure.

[0075] One of the technical solutions of the present invention is to provide a method for using the super basic method, comprising the following steps:

[0076] During operation, the upper structure and the friction sliding mass move horizontally relative to the ground, and the friction sliding mass slides on the friction surface to provide friction damping;

[0077] The slotted hollow rigid resonant mass, the friction sliding mass, the second tuning spring and the ternary resonance unit locally resonate to form a wider low-frequency band gap, which is beneficial to isolating vibration transmission.

[0078] Furthermore, the resonant mass is a rigid resonant mass, the base is fixedly connected to the top of the rigid resonant mass, and a sliding disk is provided on the top of the inertia disk group;

[0079] The rigid resonant mass is placed on the ground, and a second pulley is provided between the rigid resonant mass and the ground, sliding on the ground;

[0080] The rigid resonant mass is connected to a surrounding support via a second tuning spring, and the surrounding support is fixed to the ground;

[0081] The driving outer cylinder is fixedly connected to a support shaft, which is placed on top of the rigid resonant mass, and a fourth pulley is provided between the support shaft and the rigid resonant mass;

[0082] The top of the support shaft is fixedly connected to a support plate, the support plate is placed on a sliding plate, a third pulley is provided between the support plate and the sliding plate, the support plate is fixedly connected to the upper structure, moves together with the upper structure, and supports the upper structure;

[0083] The three-element resonance unit, the rigid resonance mass, the support plate, and the support shaft together constitute a resonance cell, and a plurality of resonance cells are combined to form a super foundation.

[0084] As a preferred technical solution, a second pulley is provided between the bottom of the rigid resonant mass and the ground.

[0085] As a preferred technical solution, the side wall of the rigid resonant mass is connected to the surrounding support via a second tuning spring.

[0086] As a preferred technical solution, the driving outer cylinder is fixedly connected to the side wall of the support shaft, and a fourth pulley is provided between the bottom of the support shaft and the top of the rigid resonant mass.

[0087] As a preferred technical solution, the top of the support shaft is fixedly connected to one end of the bottom of the support plate, the support plate is placed on the top of the sliding disk, a third pulley is provided between the other end of the bottom of the support plate and the top of the sliding disk, and the top of the support plate is fixedly connected to the upper structure.

[0088] One of the technical solutions of the present invention is to provide a method for using the super basic method, comprising the following steps:

[0089] During operation, the support plate, the support shaft, and the fourth pulley move horizontally relative to the rigid resonance mass and the three-element resonance unit, and drive the three-element resonance unit to operate.

[0090] Furthermore, the resonant mass adopts a grooved rigid resonant mass, which is placed on the ground, and a second pulley is provided between the grooved rigid resonant mass and the ground, sliding on the ground;

[0091] A top groove is provided on the top of the grooved rigid resonant mass, and the bottom of the top groove is provided as a friction surface;

[0092] A friction sliding mass is placed on the friction surface, and the friction sliding mass is connected to the top groove through a second tuning spring;

[0093] The friction sliding mass is fixedly connected to the upper structure, moves with the upper structure, and supports the upper structure, and the bottom also slides on the friction surface;

[0094] The three-element resonance unit is arranged around the grooved rigid resonance mass, the base is fixedly connected to the ground, and the driving outer cylinder is fixedly connected to the grooved rigid resonance mass;

[0095] The three-element resonance unit, the slotted rigid resonance mass, the friction sliding mass, and the second tuning spring together constitute a resonance cell, and a plurality of resonance cells are combined to form a super foundation.

[0096] As a preferred technical solution, a second pulley is provided between the bottom of the grooved rigid resonant mass and the ground.

[0097] As a preferred technical solution, the friction sliding mass is connected to the side wall of the top groove through a second tuning spring.

[0098] As a preferred technical solution, the top of the friction sliding mass is fixedly connected to the superstructure.

[0099] As a preferred technical solution, the driving outer cylinder is fixedly connected to the side wall of the grooved rigid resonant mass.

[0100] One of the technical solutions of the present invention is to provide a method for using the super basic method, comprising the following steps:

[0101] When working, the upper structure and the friction sliding mass move horizontally relative to the ground, and support the upper structure and slide on the friction surface to provide friction damping;

[0102] The horizontal movement of the slotted rigid resonant mass drives the ternary resonant unit to work.

[0103] As a preferred technical solution, the shape of the resonant mass includes a rectangle or a circle.

[0104] Metamaterials are new artificial composite periodic materials based on artificial structural unit cells, which can achieve mechanical properties that traditional natural materials cannot achieve. The sensitivity of metamaterial periodic structures to dynamic loads makes it possible to achieve vibration and noise control. Traditional local resonance metamaterials set local resonance units wrapped by flexible materials in the unit cell structure, thereby generating a band gap that prevents the propagation of elastic waves, which makes it possible to achieve low-frequency band gaps and construct metamaterials in the field of earthquake engineering. However, local resonance metamaterials are not effective enough to attenuate elastic waves within the resonance band gap. To achieve low-frequency and broadband band gaps, it is often necessary to increase the additional mass of the resonance unit and reduce the effective stiffness within the resonance unit, which limits the application of such technologies under complex engineering constraints. In view of this, the ternary resonance unit proposed in the present invention can be further combined with the resonance mass to form a unit cell, and then form the basis of the metamaterial, which has achieved the dual-target engineering effects of static bearing capacity and dynamic vibration isolation. Based on the flexible tuning and controllable bandwidth expansion capabilities of the proposed ternary resonance unit, the composed super-foundation can achieve low-frequency bandgap widening, super-damping efficiency enhancement and inertia efficiency enhancement, which is conducive to achieving more efficient vibration transmission suppression.

[0105] Compared with the prior art, the present invention has the following beneficial effects:

[0106] (1) The present invention utilizes a coaxial counter-rotating gear set to simultaneously realize multi-stage inertia behavior, nonlinear negative stiffness behavior, time-varying stiffness behavior, and eddy current damping behavior, thereby forming a three-dimensional shock absorber unit. The stiffness of the device can be adjusted in real time to positive stiffness, negative stiffness, or quasi-zero stiffness through a current regulator. This further realizes flexible adjustment of structural stiffness, absorption and dissipation of vibration energy, and maximum utilization of energy efficiency.

[0107] (2) The present invention flexibly adjusts the number of energized coils, the direction of the magnetic poles (current direction), and the magnitude of the magnetic force (current magnitude). The present invention can be used to achieve time-varying nonlinear negative stiffness, nonlinear positive stiffness, or quasi-zero stiffness, which is conducive to more flexible adjustment of structural stiffness and widening the frequency band of structural vibration control;

[0108] (3) The nonlinear negative stiffness generated by the preload spring and the energized coil of the present invention and the amplifying effect of the tuning spring on the deformation of the driving outer cylinder are conducive to promoting the relative deformation between the energized coils, thereby improving the energy consumption efficiency of the generated eddy current damping and the structural vibration control efficiency;

[0109] (4) The nonlinear negative stiffness, nonlinear positive stiffness or quasi-zero stiffness generated by the present invention can be adjusted in real time by a current regulator, which is conducive to realizing adaptive control based on deformation;

[0110] (5) The present invention combines the proposed three-element resonance unit with the resonance mass, tuning spring, etc. to introduce internal vibration freedom and additional local resonance mass, thereby realizing the deformation amplification-energy absorption efficiency of the local resonance mass and the deformation-energy consumption efficiency of the eddy current damping unit under small deformation conditions; the present invention can further form a local resonance cell and then form a super-foundation, which is conducive to realizing a low-bandwidth bandgap and isolating the transmission of vibration in the super-foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0111] Figure 1 Schematic diagram of the structure of a coaxial counter-rotating gear set type inertia damping negative stiffness ternary resonance unit in an embodiment of the present invention;

[0112] Figure 2 Schematic diagram of the connection between the screw rod and the driving outer cylinder in an embodiment of the present invention;

[0113] Figure 3 This is a schematic structural diagram of the super foundation in Example 1 of the present invention;

[0114] Figure 4 Schematic diagram of the connection between the coaxial counter-rotating gear set type inertia capacity damping negative stiffness ternary resonance unit and the super foundation in Example 1 of the present invention;

[0115] Figure 5 This is a schematic structural diagram of the super foundation in Example 2 of the present invention;

[0116] Figure 6 This is a first connection diagram of the coaxial counter-rotating gear set type inertia capacity damping negative stiffness ternary resonance unit and the super foundation in Example 2 of the present invention;

[0117] Figure 7 This is a second connection diagram of the coaxial counter-rotating gear set type inertia capacity damping negative stiffness ternary resonance unit and the super foundation in Example 2 of the present invention;

[0118] Figure 8 This is a schematic structural diagram of the super foundation in Example 3 of the present invention;

[0119] Figure 9 Schematic diagram of the connection between the coaxial counter-rotating gear set type inertia damping negative stiffness ternary resonance unit and the super foundation in Example 3 of the present invention.

[0120] Description of the marks in the figure:

[0121] 1 - screw rod, 2 - nut, 3 - first constraint fixing seat, 4 - driving gear, 5 - first counter-rotating gear, 6 - second counter-rotating gear, 7 - support gear, 8 - second constraint fixing seat, 9 - central axis, 10 - second rotating cylinder, 11 - first rotating cylinder, 12 - first main disk, 13 - first sub-disk, 14 - second main disk, 15 - second sub-disk, 16 - preload spring, 17 - energized coil, 18 - base, 19 - driving outer cylinder, 20 - first tuning spring, 21 - fixed rotating axis;

[0122] 22 - slotted hollow rigid resonant mass, 23 - first pulley, 24 - friction surface, 25 - second tuning spring, 26 - friction sliding mass, 27 - second pulley, 28 - support plate, 29 - third pulley, 30 - sliding disk, 31 - support shaft, 32 - fourth pulley, 33 - rigid resonant mass, 34 - slotted rigid resonant mass, 35 - surround support. DETAILED DESCRIPTION

[0123] The present invention is described in detail below with reference to specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0124] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, used to describe common objects, merely refer to different instances of the same object and are not intended to imply that the objects described must be in a given order, whether temporally, spatially, sequentially, or in any other manner.

[0125] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0126] Example 1:

[0127] A coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance unit, such as Figure 1As shown, it includes a ball screw starter, a coaxial counter-rotating gear set, an inertia plate set, a damping negative stiffness unit and a fixed seat.

[0128] The ball screw starter includes a screw 1, a nut 2, a drive gear 4 and a drive outer cylinder 19. The drive outer cylinder 19 is connected to the outside world as a drive end and is sleeved on one end of the screw 1. The nut 2 and the drive gear 4 are sleeved on the other end of the screw 1. The drive gear 4 is fixedly connected to the nut 2 and rotates with the nut 2.

[0129] The other end of the screw rod 1 is provided with an external thread, and the nut 2 is provided with an internal thread.

[0130] The coaxial counter-rotating gear set includes a first counter-rotating gear 5 and a second counter-rotating gear 6. Both sides of the driving gear 4 are respectively engaged with the first counter-rotating gear 5 and the second counter-rotating gear 6.

[0131] The second counter-rotating gear 6 is sleeved on the lower end of the central shaft 9 through the second rotating cylinder 10. The second counter-rotating gear 6 is fixedly sleeved on the lower end of the second rotating cylinder 10 and rotates together with the second rotating cylinder 10.

[0132] The first reverse-rotating gear 5 is sleeved on the lower end of the central shaft 9 through the first rotating cylinder 11. The first reverse-rotating gear 5 is fixedly sleeved on the lower end of the first rotating cylinder 11 and rotates together with the first rotating cylinder 11.

[0133] The first rotating cylinder 11 and the second rotating cylinder 10 are arranged inside and outside the cylinder, and the first reverse-rotating gear 5 and the second reverse-rotating gear 6 can rotate around the central axis 9.

[0134] The fixed seat includes a base 18, the lower end of the central shaft 9 is fixedly connected to the base 18, and the base 18 is connected to the outside world.

[0135] The second rotating cylinder 10 is wrapped around the central shaft 9 and is connected to the central shaft 9 through a rotating bearing and can rotate around the central shaft 9.

[0136] The first rotating drum 11 is wrapped around the second rotating drum 10 and is connected to the second rotating drum 10 via a rotating bearing, and can rotate around the second rotating drum 10.

[0137] The inertia disk assembly includes a first inertia disk and a second inertia disk. The first inertia disk is fixedly connected to the first rotating cylinder 11 and rotates together with the first rotating cylinder 11. The second inertia disk is fixedly connected to the second rotating cylinder 10 and rotates together with the second rotating cylinder 10.

[0138] The first counter-rotating gear 5 and the first inertia disk are arranged inward, and the second counter-rotating gear 6 and the second inertia disk are arranged outward.

[0139] The damping negative stiffness unit includes an energized coil 17, which is disposed between the first inertia disk and the second inertia disk. The energized coils 17 are arranged in pairs, one of which is fixedly connected to the first inertia disk and the other is fixedly connected to the second inertia disk.

[0140] The screw 1 and nut 2 form a ball screw mechanism, which converts the horizontal movement of the screw 1 into the rotational movement of the nut 2. The horizontal displacement of the screw 1 is further converted into the rotation of the drive gear 4 through the fixed connection between the nut 2 and the drive gear 4, thereby driving the coaxial counter-rotating gear set to work;

[0141] A pair of coaxial counter-rotating gears drive their respective rotating shafts to rotate in opposite directions, thereby driving the inertia disk fixed on the rotating shaft to rotate in opposite directions;

[0142] The rotation of a pair of coaxial counter-rotating gears produces a first-order inertial behavior, and the rotation of a pair of counter-rotating inertia disks produces a second-order inertial behavior.

[0143] At the same time, the energized coil 17 works together with the inertia disk to generate eddy current damping, which can realize a three-element resonance unit with coordinated working of inertia capacity, damping and negative stiffness.

[0144] The fixing seat includes a first constraint fixing seat 3, the upper end of the first constraint fixing seat 3 is rotatably connected to the nut 2, and the lower end is fixedly connected to the base 18;

[0145] A step is provided on the nut 2. A pair of thrust bearings are provided at the connection between the first constraint fixing seat 3 and the nut 2. The step of the nut 2 is constrained between the pair of thrust bearings to constrain the horizontal and vertical displacement of the nut 2, but not the rotation of the nut 2.

[0146] The two sides of the first counter-rotating gear 5 are respectively meshed with the driving gear 4 and the supporting gear 7 at the top, and the two sides of the second counter-rotating gear 6 are respectively meshed with the driving gear 4 and the supporting gear 7 at the bottom;

[0147] The fixing base also includes a second constraint fixing base 8, and the support gear 7 is sleeved on the fixed rotating shaft 21. The upper end of the second constraint fixing base 8 is fixedly connected to the fixed rotating shaft 21, and the lower end is fixedly connected to the base 18. The support gear 7 can rotate around the fixed rotating shaft 21, and the fixed rotating shaft 21 itself does not rotate;

[0148] The inertia disk is a composite material inertia disk. The composite material inertia disk includes a main disk and a sub-disk that are fixedly connected. The main disk and the sub-disk move together. The main disk is made of steel or copper, preferably steel in this embodiment. The sub-disk is made of copper or silver, preferably copper in this embodiment. The conductivity of the main disk does not need to be very good. It mainly serves to provide mass and fix the sub-disk. The conductivity of the sub-disk is relatively high. Better conductivity can better generate eddy current damping.

[0149] The first inertia disk includes a first main disk 12 and a first auxiliary disk 13, and the second inertia disk includes a second main disk 14 and a second auxiliary disk 15. The first auxiliary disk 13 and the second auxiliary disk 15 are arranged inward, and the first main disk 12 and the second main disk 14 are arranged outward. The auxiliary disks are arranged inward because they are closer to the energized coil 17, the magnetic induction intensity is higher, and the efficiency of generating eddy current damping is higher;

[0150] The damping negative stiffness unit also includes a pre-compression spring 16, which is disposed between the first inertia disc and the second inertia disc. The pre-compression spring 16 has its ends fixedly connected to the first inertia disc and the second inertia disc, respectively. The pre-compression spring 16 deforms as the first inertia disc and the second inertia disc rotate in opposite directions, generating nonlinear negative stiffness behavior.

[0151] The two ends of the pre-compression spring 16 are fixedly connected to the first sub-disk 13 and the second sub-disk 15 respectively. One of the energized coils 17 arranged in pairs is fixedly connected to the first sub-disk 13, and the other is fixedly connected to the second sub-disk 15.

[0152] When the three-element resonance unit is in a balanced position, the preload spring 16 remains vertical, and the paired energized coils 17 are on a vertical line;

[0153] The counter-rotating pair of inertia disks causes several pre-loaded springs 16 fixed inside the inertia disks to deform, and at the same time causes several pairs of energized coils 17 fixed inside the inertia disks to move relative to each other.

[0154] The magnetic poles of the paired energized coils 17 can be the same or opposite. If the energized coils 17 undergo relative displacement with the same magnetic poles facing each other, nonlinear softening negative stiffness behavior is generated. If the energized coils 17 undergo relative displacement with different magnetic poles facing each other, nonlinear softening positive stiffness behavior is generated. This is because, in the equilibrium position, the distance between the magnetic poles of the energized coils 17 is the smallest, and the stiffness generated by the interaction between the two is the strongest. After the inertia disk undergoes relative rotation, the distance between the magnetic poles of the energized coils 17 increases, and the stiffness generated by the interaction between the two will weaken, that is, the stiffness softens and weakens with increasing displacement.

[0155] The magnetic pole and magnetic force of the energized coil 17 can be adjusted by the current controller, thereby achieving time-varying adjustment of the overall positive stiffness, negative stiffness, and quasi-zero stiffness of the ternary resonance unit;

[0156] like Figure 2 As shown, the ball screw starter further includes a first tuning spring 20 . The first tuning spring 20 is disposed in the driving outer cylinder 19 , and the inner wall of the driving outer cylinder 19 is connected to one end of the screw 1 through the first tuning spring 20 .

[0157] In this embodiment, the materials of the screw rod 1, the nut 2, the seat, the gear, the shaft, the cylinder and the spring are steel, and the material of the energized coil 17 is copper.

[0158] It should be noted that the number of pre-compression springs 16 is not limited to 4 and can be flexibly adjusted according to actual needs;

[0159] The number of the 17 pairs of energized coils is not limited to 4 pairs and can be flexibly adjusted according to actual needs;

[0160] The magnetic pole position and magnetic force of the pair of energized coils 17 can be adjusted by the current regulator to adjust the direction and magnitude of the current. The ratio of the relative arrangement of the same magnetic poles and the relative arrangement of the different magnetic poles in the pair of energized coils 17 should be selected according to actual needs. By changing the relative arrangement ratio or the magnetic force, positive stiffness, negative stiffness or quasi-zero stiffness can be achieved. In this embodiment, it is preferred that all the same magnetic poles are arranged relative to each other to produce stronger nonlinear negative stiffness.

[0161] A coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance method uses the above three-element resonance unit to resonate, and the specific steps are as follows:

[0162] When the driving outer cylinder 19 moves to the left from the equilibrium position, the first tuning spring 20 drives the lead screw 1 to move to the left, and at the same time the deformation of the driving outer cylinder 19 is amplified;

[0163] When the screw rod 1 moves to the left, it drives the nut 2 to rotate counterclockwise (from right to left), which in turn drives the drive gear 4 to rotate counterclockwise (from right to left).

[0164] The counterclockwise rotation of the driving gear 4 (viewed from right to left) will drive the first counter-rotating gear 5 to rotate clockwise (viewed from top to bottom), and drive the second counter-rotating gear 6 to rotate counterclockwise (viewed from top to bottom);

[0165] The first counter-rotating gear 5 and the second counter-rotating gear 6 rotating in opposite directions will produce a first-order inertial behavior;

[0166] The first counter-rotating gear 5 drives the first rotating cylinder 11 to rotate clockwise (as viewed from top to bottom), thereby driving the first inertia disk to rotate clockwise (as viewed from top to bottom).

[0167] The second counter-rotating gear 6 drives the second rotating cylinder 10 to rotate counterclockwise (as viewed from top to bottom), thereby driving the second inertia disk to rotate counterclockwise (as viewed from top to bottom);

[0168] The rotation of the first inertia disk and the second inertia disk will produce secondary inertia behavior;

[0169] The reverse rotation between the first inertia disk and the second inertia disk will cause the preload spring 16 to deform, resulting in nonlinear negative stiffness behavior;

[0170] In addition, it will also cause 17 pairs of energized coils that were originally in a vertical line to shift;

[0171] If the pair of energized coils 17 have the same magnetic poles facing each other, that is, the magnetic pole of the upper end of the energized coil 17 connected to the first inertia disk is consistent with the magnetic pole of the lower end of the energized coil 17 connected to the second inertia disk, the pair of energized coils 17 will produce nonlinear negative stiffness behavior;

[0172] If the pair of energized coils 17 have opposite magnetic poles, nonlinear positive stiffness behavior will occur;

[0173] At the same time, the pair of energized coils 17 together with the first inertia disk and the second inertia disk form an eddy current damper, which can generate energy dissipation behavior.

[0174] A metamaterial foundation comprises a plurality of groups of the above-mentioned ternary resonance units and a resonance mass, wherein the ternary resonance units are connected to the resonance mass via a driving outer cylinder 19 , and the ternary resonance units are combined with resonance masses of different forms to form a local resonance unit, which further constitutes a metamaterial foundation;

[0175] Combining the ternary resonance unit with resonant mass and tuning springs can further form a localized resonant cell, and then form a meta-foundation, which is conducive to achieving a low-bandwidth bandgap and isolating the transmission of vibrations in the meta-foundation.

[0176] like Figure 3 and Figure 4 As shown, the resonant mass is a grooved hollow rigid resonant mass 22, a cavity is opened in the grooved hollow rigid resonant mass 22, the ternary resonant unit is placed at the bottom of the cavity, and a first pulley 23 is provided between the base 18 and the bottom of the cavity, and the ternary resonant unit can slide in the grooved hollow rigid resonant mass 22;

[0177] The driving outer cylinder 19 is fixedly connected to the side wall of the cavity;

[0178] The grooved hollow rigid resonant mass 22 is placed on the ground, and a second pulley 27 is provided between the bottom of the grooved hollow rigid resonant mass 22 and the ground, capable of sliding on the ground;

[0179] A top groove is provided on the top of the slotted hollow rigid resonant mass 22, and the bottom of the top groove is provided as a friction surface 24;

[0180] A friction sliding mass 26 is placed on the friction surface 24, and the friction sliding mass 26 is connected to the side wall of the top groove through a second tuning spring 25;

[0181] The top of the friction sliding mass 26 is fixedly connected to the upper structure, moves with the upper structure, and can support the upper structure, and the bottom can also slide on the friction surface 24;

[0182] The three-element resonance unit, the slotted hollow rigid resonance mass 22, the friction sliding mass 26, the second tuning spring 25, and the friction surface 24 together constitute a resonance cell, and a plurality of resonance cells are combined to form a super foundation.

[0183] The above super basic usage method, the specific steps are as follows:

[0184] During operation, the upper structure and the friction sliding mass 26 move horizontally relative to the ground, and the friction sliding mass 26 slides on the friction surface 24 to provide friction damping;

[0185] The slotted hollow rigid resonant mass 22, the friction sliding mass 26, the second tuning spring 25 and the three-element resonance unit locally resonate to form a wider low-frequency band gap, which is beneficial to isolating vibration transmission.

[0186] Example 2:

[0187] A super foundation, comprising a plurality of groups of the above-mentioned ternary resonance units and resonance masses, is substantially the same as in Example 1, except that, as Figures 5 to 7 As shown, the resonant mass is a rigid resonant mass 33, the base 18 is fixedly connected to the top of the rigid resonant mass 33, and a sliding disk 30 is provided on the top of the inertia disk group;

[0188] The rigid resonant mass 33 is placed on the ground, and a second pulley 27 is provided between the bottom of the rigid resonant mass 33 and the ground, capable of sliding on the ground;

[0189] The sidewalls of the rigid resonant mass 33 are connected to a surrounding support 35 via a second tuning spring 25 , and the surrounding support 35 is fixed to the ground;

[0190] The driving outer cylinder 19 is fixedly connected to the side wall of the support shaft 31. The support shaft 31 is placed on the top of the rigid resonant mass 33. A fourth pulley 32 is provided between the bottom of the support shaft 31 and the top of the rigid resonant mass 33.

[0191] The top of the support shaft 31 is fixedly connected to one end of the bottom of the support plate 28. The support plate 28 is placed on the top of the sliding plate 30. A third pulley 29 is provided between the other end of the bottom of the support plate 28 and the top of the sliding plate 30. The top is fixedly connected to the upper structure, moves with the upper structure, and can support the upper structure.

[0192] The three-element resonance unit, the rigid resonance mass 33, the support plate 28, and the support shaft 31 together constitute a resonance cell, and a plurality of resonance cells are combined to form a super foundation.

[0193] The above super basic usage method, the specific steps are as follows:

[0194] During operation, the support plate 28 , the support shaft 31 , and the fourth pulley 32 move horizontally relative to the rigid resonant mass 33 and the three-element resonance unit, and drive the three-element resonance unit to operate.

[0195] Example 3:

[0196] A super foundation, comprising a plurality of groups of the above-mentioned ternary resonance units and resonance masses, is substantially the same as in Example 1, except that, as Figure 8 and Figure 9 As shown, the resonant mass is a grooved rigid resonant mass 34, which is placed on the ground. A second pulley 27 is provided between the bottom of the grooved rigid resonant mass 34 and the ground, and can slide on the ground.

[0197] A top groove is formed on the top of the slotted rigid resonant mass 34 , and the bottom of the top groove is set as the friction surface 24 ;

[0198] A friction sliding mass 26 is placed on the friction surface 24, and the friction sliding mass 26 is connected to the side wall of the top groove through a second tuning spring 25;

[0199] The top of the friction sliding mass 26 is fixedly connected to the upper structure, moves with the upper structure, and can support the upper structure, and the bottom can also slide on the friction surface 24;

[0200] The three-element resonance unit is arranged around the grooved rigid resonance mass 34, the base 18 is fixedly connected to the ground, and the driving outer cylinder 19 is fixedly connected to the side wall of the grooved rigid resonance mass 34;

[0201] The three-element resonance unit, the slotted rigid resonance mass 34, the friction sliding mass 26, and the second tuning spring 25 together constitute a resonance cell, and a plurality of resonance cells are combined to form a super foundation.

[0202] The above super basic usage method, the specific steps are as follows:

[0203] During operation, the upper structure and the friction sliding mass 26 move horizontally relative to the ground and can support the upper structure, sliding on the friction surface 24 to provide friction damping;

[0204] The horizontal movement of the slotted rigid resonant mass 34 drives the three-element resonant unit to work.

[0205] It should be noted that the resonant mass is always rectangular in shape, but it can also be set to circular;

[0206] The number of the second tuning springs 25 fixedly connected to the four side walls of the resonant mass is not limited to four and can be flexibly adjusted according to actual needs;

[0207] The super basic layout is 3×3, and can also be arranged in 4×4 or other regular arrangements according to actual needs;

[0208] In Example 3, the number of ternary resonance units fixedly connected to the four side walls of the slotted rigid resonant mass 34 is not limited to four and can be flexibly adjusted according to actual needs.

[0209] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. A coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance unit, characterized in that: The three-element resonance unit includes a ball screw starter, a coaxial counter-rotating gear set, an inertia disk set, a damping negative stiffness unit and a fixed seat. The ball screw starter comprises a screw (1), a nut (2), a driving gear (4) and a driving outer cylinder (19), wherein the driving outer cylinder (19) is connected to the outside world and is sleeved on the screw (1), the nut (2) and the driving gear (4) are sleeved on the screw (1), and the driving gear (4) is fixedly connected to the nut (2). The coaxial counter-rotating gear set comprises a first counter-rotating gear (5) and a second counter-rotating gear (6), the driving gear (4) meshes with the first counter-rotating gear (5) and the second counter-rotating gear (6), The second counter-rotating gear (6) is sleeved on the central shaft (9) through the second rotating cylinder (10), and the second counter-rotating gear (6) is fixedly sleeved on the second rotating cylinder (10). The first counter-rotating gear (5) is sleeved on the central shaft (9) through the first rotating cylinder (11), and the first counter-rotating gear (5) is fixedly sleeved on the first rotating cylinder (11). The first rotating cylinder (11) and the second rotating cylinder (10) are arranged inside and outside the cylinder. The fixed seat includes a base (18), the central shaft (9) is fixedly connected to the base (18), and the base (18) is connected to the outside world. The inertia disk assembly comprises a first inertia disk and a second inertia disk, wherein the first inertia disk is fixedly connected to the first rotating cylinder (11), and the second inertia disk is fixedly connected to the second rotating cylinder (10). The damping negative stiffness unit includes an energized coil (17), wherein the energized coil (17) is provided between the first inertia disk and the second inertia disk, and the energized coils (17) are arranged in pairs, one of which is fixedly connected to the first inertia disk, and the other is fixedly connected to the second inertia disk; The first inertia disk and the second inertia disk are both composite material inertia disks; The first inertia disk comprises a first main disk (12) and a first auxiliary disk (13), the second inertia disk comprises a second main disk (14) and a second auxiliary disk (15), the first auxiliary disk (13) and the second auxiliary disk (15) are arranged inwardly, and the first main disk (12) and the second main disk (14) are arranged outwardly; The damping negative stiffness unit further includes a pre-compression spring (16), wherein the pre-compression spring (16) is provided between the first inertia disk and the second inertia disk, and the two ends of the pre-compression spring (16) are respectively fixedly connected to the first inertia disk and the second inertia disk.

2. The coaxial counter-rotating gear set type inertia damping negative stiffness ternary resonance unit according to claim 1, characterized in that: The ball screw starter further comprises a first tuning spring (20), the first tuning spring (20) is arranged in the driving outer cylinder (19), and the driving outer cylinder (19) is connected to the screw (1) via the first tuning spring (20).

3. The coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance unit according to claim 1, characterized in that: The fixing seat comprises a first constraining fixing seat (3), one end of which is rotatably connected to a nut (2) and the other end of which is fixedly connected to a base (18); The first counter-rotating gear (5) is meshed with the driving gear (4) and the supporting gear (7), and the second counter-rotating gear (6) is meshed with the driving gear (4) and the supporting gear (7); The fixing seat further comprises a second constraint fixing seat (8), the support gear (7) is sleeved on the fixed rotating shaft (21), one end of the second constraint fixing seat (8) is fixedly connected to the fixed rotating shaft (21), and the other end is fixedly connected to the base (18).

4. The coaxial counter-rotating gear set type inertia damping negative stiffness ternary resonance unit according to claim 1, characterized in that: The composite material inertia disk includes a main disk and a sub-disk that are fixedly connected. The main disk is made of steel or copper, and the sub-disk is made of copper or silver.

5. The coaxial counter-rotating gear set type inertia damping negative stiffness three-element resonance unit according to claim 1, characterized in that: The magnetic poles of the energized coils (17) arranged in pairs are the same or opposite.

6. A super foundation, characterized in that The super foundation comprises a plurality of groups of ternary resonance units as described in any one of claims 1 to 5 and a resonance mass, wherein the ternary resonance units are connected to the resonance mass via a driving outer cylinder (19).

7. A super foundation according to claim 6, characterized in that: The resonant mass adopts a slotted hollow rigid resonant mass (22), a cavity is provided in the slotted hollow rigid resonant mass (22), the ternary resonant unit is placed in the cavity, and a first pulley (23) is provided between the base (18) and the cavity; The driving outer cylinder (19) is fixedly connected to the cavity; The grooved hollow rigid resonant mass (22) is placed on the ground, and a second pulley (27) is provided between the grooved hollow rigid resonant mass (22) and the ground; The top of the grooved hollow rigid resonant mass (22) is provided with a top groove, and the bottom of the top groove is provided as a friction surface (24); A friction sliding mass (26) is placed on the friction surface (24), and the friction sliding mass (26) is connected to the top groove via a second tuning spring (25); The friction sliding mass (26) is fixedly connected to the upper structure.

8. A super foundation according to claim 6, characterized in that: The resonant mass is a rigid resonant mass (33), the base (18) is fixedly connected to the top of the rigid resonant mass (33), and a sliding disk (30) is provided on the top of the inertia disk assembly; The rigid resonant mass (33) is placed on the ground, and a second pulley (27) is provided between the rigid resonant mass (33) and the ground; The rigid resonant mass (33) is connected to a surrounding support (35) via a second tuning spring (25), and the surrounding support (35) is fixed to the ground; The driving outer cylinder (19) is fixedly connected to a support shaft (31), the support shaft (31) is placed on top of a rigid resonant mass (33), and a fourth pulley (32) is provided between the support shaft (31) and the rigid resonant mass (33); The top of the support shaft (31) is fixedly connected to a support plate (28), the support plate (28) is placed on a sliding disk (30), a third pulley (29) is provided between the support plate (28) and the sliding disk (30), and the support plate (28) is fixedly connected to the upper structure.

9. The super foundation according to claim 6, characterized in that: The resonant mass is a grooved rigid resonant mass (34), which is placed on the ground, and a second pulley (27) is provided between the grooved rigid resonant mass (34) and the ground; A top groove is provided on the top of the grooved rigid resonant mass (34), and the bottom of the top groove is provided as a friction surface (24); A friction sliding mass (26) is placed on the friction surface (24), and the friction sliding mass (26) is connected to the top groove via a second tuning spring (25); The friction sliding mass (26) is fixedly connected to the superstructure; The three-element resonance unit is arranged around the slotted rigid resonance mass (34), the base (18) is fixedly connected to the ground, and the driving outer cylinder (19) is fixedly connected to the slotted rigid resonance mass (34).

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