CN116221336A - Two-dimensional nonlinear energy trap device and use method - Google Patents

Abstract

The invention relates to a two-dimensional nonlinear energy trap device and a use method thereof, belongs to the technical field of vibration reduction and energy consumption devices, and solves the problem of poor vibration reduction effect of high-rise building structure vibration. The two-dimensional nonlinear energy trap device is characterized by comprising an outer frame, a friction disc, an elastic friction assembly and a support; the friction plate is fixed in the outer frame in parallel, an opening is formed in the middle of the friction plate, and two ends of the elastic friction assembly penetrate through the opening and are respectively hinged to the top end and the bottom end of the outer frame through the support; the friction component and the friction disc are in sliding friction. The invention realizes more effective vibration reduction effect of the nonlinear energy trap.

Description

Two-dimensional nonlinear energy trap device and use method

Technical Field

The invention relates to the technical field of vibration reduction and energy consumption devices, in particular to a two-dimensional nonlinear energy well device and a use method thereof.

Background

In order to solve the problem of vibration control, the conventional structure generally adopts a tuned mass damper device, and the structure can resonate with the main structure in a specific frequency band to exert a good vibration reduction effect, but the vibration reduction frequency band is narrow, so that the structure is difficult to be suitable for multi-frequency forced vibration of the main structure.

In addition, the nonlinear restoring force provided by the existing nonlinear energy trap structure by means of the combination of springs, magnets and the like is mostly only in a single track direction, so that the energy absorption effect and the vibration resistance effect are poor.

Disclosure of Invention

In view of the above analysis, the present invention aims to provide a two-dimensional nonlinear energy trap device and a use method thereof, which are used for solving the problem of poor vibration reduction effect of the conventional nonlinear energy trap device.

The aim of the invention is mainly realized by the following technical scheme:

a two-dimensional nonlinear energy trap device comprises an outer frame, a friction disk, an elastic friction component and a support; the friction disc is fixedly connected with the outer frame, an opening is formed in the middle of the friction disc, two ends of the elastic friction assembly penetrate through the opening and are respectively hinged to the top end and the bottom end of the outer frame through the support, and the elastic friction assembly is in sliding friction connection with the friction disc.

Further, the elastic friction assembly includes: the device comprises a friction ring, a vibrator, a first elastic unit and a second elastic unit; the first elastic unit and the second elastic unit are connected with each other through a connecting shaft, the vibrator is sleeved on the connecting shaft, and the friction ring is fixedly connected with the vibrator through a connecting frame.

Further, the first elastic unit and the second elastic unit have the same structure; the first elastic unit includes a spring, a first spring seat, and a second spring seat.

Further, the first and second spring seats each include a polygonal sleeve.

Further, the connecting frame comprises four supporting arms, and the four supporting arms are all arranged downwards.

Further, the diameter of the friction ring is larger than that of the friction disc, and the friction ring and the friction disc are in sliding friction connection.

Further, the vibrator comprises a mass block and a long bolt; the mass block is fixed on the connecting frame through a long bolt.

Further, the support comprises a first support and a second support; the first support and the second support are respectively connected with the top end and the bottom end of the outer frame.

Further, the first support and the second support are identical in structure, and the first support comprises a nut, a support rod, a bearing outer ring and a bearing inner ring.

Further, the application method of the two-dimensional nonlinear energy well device comprises the following specific steps:

assembling the outer frame, the friction disc, the elastic friction assembly and the support, and consuming vibration energy;

increasing or reducing the mass of the vibrator, and adjusting the mass parameter to enable the nonlinear energy well vibrator mass parameter to be matched with the mass of the connected main building structure; thereby the vibrator is in a steady-state position;

when the main structure vibrates, the outer frame and the main structure synchronously move; the vibrator is not changed in the original position displacement due to the self inertia;

the first elastic unit and the second elastic unit pull the vibrator and move in the vibration direction of the connecting shaft; the vibrator reciprocates under the central nonlinear restoring force provided by the two elastic units;

the movement of the vibrator drives the friction ring and the friction disc to slide relatively through the connecting frame, so that the friction ring and the friction disc generate sliding friction, and vibration energy is consumed.

Compared with the prior art, the invention has at least one of the following beneficial effects:

(1) According to the invention, the nonlinear energy trap device is arranged on the main structure, the elastic friction assembly in the nonlinear energy trap is rotated according to the plane vibration direction of the main structure, so that the elastic friction assembly drives the vibrator to move in any direction on a two-dimensional plane, energy is absorbed on the vibrator, and further the vibrator drives the friction ring to rub against the friction disc, so that vibration energy is dissipated.

(2) According to the invention, the friction ring is arranged below the vibrator, so that the movement range of the friction ring is far smaller than that of the friction ring in a state parallel to the vibrator in the process of driving the friction ring to rotate and rub by the second elastic unit, and the gravity center of the friction ring arranged below the vibrator is arranged below the vibrator, so that the stability of the whole elastic friction assembly is improved; the diameter of the opening of the friction disk is greatly reduced, the diameter of the friction disk is further reduced, the diameter of the friction ring is correspondingly reduced, the cost expenditure of raw materials is greatly saved, and meanwhile, the occupied space of the whole device is reduced.

(3) The vertical distance between the vibrator and the friction ring is set to be more than 1/3 and less than 1/2 of the axial distance of the second elastic unit. The arrangement of the lower position of the friction disc enables the gravity center of the whole device to be lower, is favorable for the stability of the whole device when working on a main structure, and solves the embarrassing problem of unbalanced stress of the vertical vibrator caused by uneven gravity when the friction ring and the vibrator are arranged on the same horizontal plane. Meanwhile, the vertical distance between the vibrator and the friction ring is smaller than 1/2 of the axial distance of the second elastic unit, so that the situation that the friction ring is inclined and separated from the friction disc is avoided; the contact area between the friction ring and the friction disc is larger, so that the friction energy consumption effect is improved; in addition, the vertical distance between the vibrator and the friction ring is greater than 1/3 of the axial distance of the second elastic unit, so that the gravity center of the friction disk is lowered, the stability of the whole structure is improved, the whole diameters of the friction ring and the friction disk are reduced, the cost expenditure of the whole material is reduced, and the occupied area of the whole device is reduced.

(4) The invention specially sets the inner sleeve and the outer sleeve into polygonal sleeves, so that the two sleeves (the first spring seat and the second spring seat) do not rotate relatively, and only the contraction and the extension motions are generated by the springs. The design of inside and outside sleeve polygon can make two elastic element in the in-process that carries out friction power consumption, through the connection of intermediate junction axle, makes both in a vertical plane all the time, and the motion of whole elasticity friction subassembly is in this vertical plane all the time promptly, makes two springs form nonlinear restoring force, and the bearing setting on the rethread support for the vertical plane that elasticity friction subassembly formed can rotate in arbitrary direction, and then satisfies the removal demand of oscillator in plane all directions, satisfies the damping of all directions in the plane.

In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.

FIG. 1 is a schematic diagram of a two-dimensional nonlinear energy well device of the present invention;

FIG. 2 is a schematic view of the structure of an outer frame in a two-dimensional nonlinear energy well device of the present invention;

FIG. 3 is a schematic diagram of a first support in a two-dimensional nonlinear energy well device of the present invention;

FIG. 4 is a schematic diagram of the structure of a support in a two-dimensional nonlinear energy well device of the present invention;

fig. 5 is a schematic structural diagram of a first elastic unit in the two-dimensional nonlinear energy well device of the present invention.

Reference numerals:

1-an outer frame; 101-a bracket; 102-top plate; 103-chassis; 104-angle steel;

2-friction disc; 3-friction rings; 4-connecting frames; 5-vibrator; 51-mass block; 52-long bolts; 6-connecting shafts; 61-axis; 62-shaft sleeve;

7-a first elastic unit; 71-a spring; 72-a first spring seat; 721-a first hinge plate; 722-a first positioning plate; 723-polygonal inner sleeve; 73-a second spring seat; 731-a second hinge plate; 732-a second positioning plate; 733-a polygonal outer sleeve; 8-a second elastic unit; 9-a first support; 91-a nut; 92-support bar; 93-an outer bearing ring; 94-bearing inner ring; 10-a second support.

Detailed Description

A two-dimensional nonlinear energy well device and method of use are described in further detail below in connection with specific embodiments, which are provided for comparison and explanation purposes only, and the invention is not limited to these embodiments.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "coupled" should be interpreted broadly, for example, as being fixedly coupled, as being detachably coupled, as being integrally coupled, as being mechanically coupled, as being electrically coupled, as being directly coupled, as being indirectly coupled via an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.

The working surface of the invention can be a plane or a curved surface, and can be inclined or horizontal. For convenience of explanation, the embodiments of the present invention are placed on a horizontal plane and used on the horizontal plane, and thus "up and down" and "up and down" are defined.

The invention adopts the spring with nonlinear rigidity as the rigidity original piece of the vibration absorber, thereby obtaining wider vibration reduction frequency band. The structure of this absorber with strong nonlinearity, and capable of unidirectionally transmitting vibration energy from the main structure to the absorber, is called a nonlinear energy trap.

The nonlinear energy trap is a passive control technology of targeted energy transmission, has strong nonlinearity, and therefore has good robustness to vibration, and is generally used for shock absorption and vibration reduction of a structure. The nonlinear energy trap is mounted on a main structure (such as a high-rise large building) and when the main structure vibrates, the nonlinear energy trap can generate a series of instantaneous resonance capture modes, so that vibration is absorbed in a wider frequency band range.

The invention discloses a two-dimensional nonlinear energy trap device, which comprises an outer frame 1, a friction disc 2, an elastic friction assembly and a support; the friction disc 2 is fixed in parallel in the outer frame 1, an opening is arranged in the middle of the friction disc 2, and two ends of the elastic friction assembly penetrate through the opening and are hinged to the top end and the bottom end of the outer frame 1 through the support respectively. The friction assembly is in sliding friction with the friction disc 2.

When the two-dimensional nonlinear energy trap device is fixed on the top layer of a high-rise large building, when the building is interfered by vibration of the external environment, the outer frame 1 and the friction plate 2 can synchronously move along with the high-rise large building, and the elastic friction assembly keeps the same position as the elastic friction assembly before vibration due to self inertia, so that the friction plate 2 and the elastic friction assembly realize relative displacement, and further energy dissipation is realized through sliding friction.

Further, the outer frame 1 includes a bracket 101, a top plate 102, a bottom plate 103, and angle steel 104. The chassis 103 is a cross vertical cross frame, the cross vertical cross frame is arranged in parallel with the ground, and the four ends of the cross vertical cross frame are fixedly connected with the bracket 101. The cross vertical cross frame is provided with a second circular connecting part at the vertical cross position, and a second circular through hole is formed in the center of the second circular connecting part.

Further, the four brackets 101 have the same structure, and include a vertical portion and a bending portion, the vertical portion is perpendicular to the ground, the bending portion is fixed at a certain angle with the vertical portion, the angle is 120 ° -140 °, so that the bending portions of the four brackets 101 can converge to a point to form the top plate 102, and meanwhile, more setting space can be provided for the elastic friction assembly, so that the structure is more stable. The top plate 102 is provided with a first circular connecting portion, and a first circular through hole is formed in the center of the first circular connecting portion. The end fixedly connected with angle steel 104 that the kink was kept away from to perpendicular portion, angle steel 104 is used for through bolt and main structure fixed connection, and when main structure takes place to rock or vibrate, outer frame 1 can follow the main structure and realize synchronous motion.

Specifically, the inner walls of the first circular through hole and the second circular through hole are provided with internal threads.

Further, the support comprises a first support 9 and a second support 10, the first support 9 is connected with the top plate 102, and the second support 10 is connected with the chassis 103.

Specifically, the first support 9 and the second support 10 have the same structure, and each include a nut 91, a support rod 92, a bearing outer ring 93, and a bearing inner ring 94. The outer wall of the support rod 92 is provided with an external thread, and is in threaded connection with the internal thread of the first circular through hole, the support rod 92 is provided with two nuts 91 in a threaded manner, when the support rod 92 passes through the first circular through hole on the top plate 102, the two nuts 91 are respectively contacted with the upper surface and the lower surface of the first circular connecting part, so that the top plate 102 is clamped between the two nuts 91, and the relative fixation of the first support 9 and the top plate 102 is realized. One end of the first support 9 is fixedly connected with a bearing outer ring 93, balls are arranged in the bearing outer ring 93, and the bearing outer ring 93 is in rolling connection with a bearing inner ring 94 through the balls to form a bearing structure. The bearing inner ring 94 is provided with a hinge plate hinged with the elastic friction assembly.

Further, the elastic friction assembly comprises a friction ring 3, a vibrator 5, a first elastic unit 7 and a second elastic unit 8. The first elastic unit 7 and the second elastic unit 8 are connected through the connecting shaft 6, the vibrator 5 is sleeved on the connecting shaft 6, and the friction ring 3 is connected with the vibrator 5 through the connecting frame 4.

Specifically, the connecting frame 4 is a four-claw frame structure and comprises a supporting table and a supporting arm. The supporting table is of a cross structure, a connecting shaft through hole is formed in the middle of the supporting table, and threads are formed in the inner wall of the supporting table; the four branch ends of the supporting table are all provided with bolt through holes, and the distances between the circle center of the supporting table and each bolt through hole are equal.

Further, the support arms are provided with four, four support arm structures are the same, each support arm evenly equidistantly outwards and downwardly extends along the periphery of supporting bench, and the end of four support arms still is equipped with the fixed station simultaneously, and every the fixed station is all on a parallel with the supporting bench, friction ring 3 with four the fixed station is all through bolt fixed connection.

Further, the opening on the friction disc 2 is circular, and the diameter of the friction ring 3 is slightly larger than that of the opening, so that the friction ring 3 can move freely on the friction disc 2 without falling into the opening, and the friction ring 3 and the friction disc 2 dissipate vibration energy of the vibrator 5 through sliding friction. The sliding friction coefficient between the friction ring 3 and the friction disc 2 needs to be moderate, the friction coefficient cannot be too large, otherwise, when the main structure vibrates to a certain extent, the outer frame 1 and the friction disc 2 can relatively move relative to the elastic friction component and the vibrator 5, and are not locked due to too large static friction force; the friction coefficient cannot be too small, otherwise there is no friction between the friction ring 3 and the friction disc 2, and no energy dissipation by friction is possible.

It should be noted that, since the four supporting arms of the connecting frame 4 are all disposed downward, the friction ring 3 fixedly connected with the connecting frame is disposed downward relative to the vibrator 5, so that the second elastic unit 8 drives the friction ring 3 to rotate in the friction process, and the movement range of the friction ring 3 is much smaller than that of the friction ring 3 disposed parallel to the vibrator 5, i.e. the opening diameter of the friction disc 2 is reduced due to the arrangement of the friction ring 3 below the vibrator 5, and the diameter of the friction disc 2 is further reduced, so that the occupied space of the whole device is reduced.

It is worth noting that the vertical distance between the vibrator 5 and the friction ring 3 is greater than 1/3 and less than 1/2 of the distance between the vibrator 5 and the chassis 103. The lower setting of friction disc 2 for whole device focus is off-centering, is favorable to the stability of whole device during operation on the main structure, has eliminated moreover that friction circle 3 and vibrator 5 set up the same horizontal plane time, the unbalanced awkward problem of vertical vibrator 5 atress that the uneven gravity leads to. However, the vertical distance between the vibrator 5 and the friction ring 3 cannot be too large, otherwise, the friction ring 3 and the vibrator 5 are unstable and may incline, one side of the vibrator is separated from the friction disc 2, and energy consumption cannot be effectively carried out; in addition, the friction disc 2 is placed too much, so that the whole area of the friction disc 2 is too small, the movement range of the friction ring 3 is further reduced, the friction energy consumption efficiency is lowered, and energy consumption cannot be effectively carried out.

Further, the connecting shaft 6 includes an axle center 61 and a shaft sleeve 62, the axle center 61 is a cylindrical axle center, the shaft sleeve 62 is a cylindrical shaft sleeve with a hollow center, and the axle center 61 is fixedly sleeved in the shaft sleeve 62.

Specifically, the outer wall of the shaft sleeve 62 is provided with a thread, and the thread is in screw connection with the through hole of the connecting shaft on the connecting frame 4, so that the shaft sleeve 62 can be fixed on the connecting frame 4. The shaft 61 includes an upper hinge portion, a lower hinge portion, and a shaft center rod, wherein the shaft center rod is equal in length to the shaft sleeve 62, such that the upper hinge portion and the lower hinge portion are exposed outside the shaft sleeve 62 after the shaft center 61 is inserted into the shaft sleeve 62.

Further, the vibrator 5 includes a mass 51 and a long bolt 52, and the mass 51 is fixed to the connection frame 4 by the long bolt 52.

Specifically, the mass block 51 is formed by a plurality of layers of cake-shaped mass plates, and a round hole is formed in the middle of the mass block and is used for being sleeved on the periphery of the connecting shaft 6; the periphery of the mass block 51 is uniformly provided with bolt holes for being connected with long bolts 52, and the four long bolts 52 are respectively and spirally fixed in bolt through holes on the connecting frame 4, so that the vibrator 5 is fixed on the connecting frame 4.

It is worth noting that the vibrator 5 may adjust the mass parameters of the device by adding or subtracting mass 51. The device structure of the invention is related to the mass parameter of the vibrator, the rigidity parameter and the damping parameter of the elastic component. The mass of the vibrator 5 is matched with the mass of the main structure connected with the device, and for the parameter configuration of mass, rigidity and damping, the ratio of the nonlinear energy trap damping parameter to the mass parameter is smaller than the natural frequency of the main structure

The device generates targeted energy transmission (directional energy transmission) and better robustness, so that after vibration energy of the main structure is unidirectionally transmitted to the nonlinear energy well, vibration energy is not returned any more and can only be dissipated through friction.

Further, one end of the connecting shaft 6 is hinged to the first elastic unit 7, and the other end is hinged to one end of the second elastic unit 8. The free ends of the first elastic unit 7 and the second elastic unit 8 are respectively hinged with the first support 9 and the second support 10. In other words, one end of the first elastic unit 7 is hinged to the connecting shaft 6, and the other end thereof is hinged to the first support 9; one end of the second elastic unit 8 is hinged with the connecting shaft 6, and the other end is hinged with the second support 10.

Further, the first elastic unit 7 and the second elastic unit 8 have the same structure, and each includes a spring 71, a first spring seat 72, and a second spring seat 73. The second spring seat 73 is sleeved on the outer side of the first spring seat 72, and is in telescopic movement between the first spring seat 72 and the second spring seat 73, and the spring 71 is arranged on the outer walls of the first spring seat 72 and the second spring seat 73.

Further, the first spring seat 72 includes a first hinge plate 721, a first positioning plate 722, and a polygonal inner sleeve 723. The positioning plate 722 has a sheet structure, one surface is connected with a first hinge plate 721, the other surface is connected with a polygonal inner sleeve 723, and the first hinge plate 721 is hinged with an upper hinge part of the axle center 61 or a hinge plate on the bearing inner ring 94 of the first support 9.

Further, the second spring seat 73 includes a second hinge plate 731, a positioning plate 732, and a polygonal outer sleeve 733. The positioning plate 732 is also in a sheet structure, one surface of the positioning plate is connected with the second hinge plate 731, the other surface of the positioning plate is connected with the polygonal outer sleeve 733, and the second hinge plate 731 is hinged with a hinge plate on the inner ring 94 of the bearing of the first support 9 or an upper hinge part of the shaft center 61.

Specifically, the diameter of the polygonal outer sleeve 733 is slightly larger than that of the polygonal inner sleeve 723, so that the polygonal outer sleeve 733 can be sleeved on the outer wall of the inner sleeve 723, and the polygonal outer sleeve 733 and the polygonal inner sleeve 723 can be stretched or contracted by external force.

The polygonal inner sleeve 723 and the polygonal outer sleeve 733 are specially configured as polygonal sleeves, and the number of sides is equal to or greater than three, preferably six. The inner and outer sleeves are each arranged in a polygonal shape such that no mutual rotation occurs between the first spring seat 72 and the second spring seat 73, but only a contraction and extension movement is generated by the spring 71. In other words, since the inner sleeve and the outer sleeve are arranged in a polygon, no relative rotation motion occurs between the two sleeves, otherwise the hinge directions of the two sleeves are inconsistent, so that the two ends of the spring 71 are twisted, and the energy consumption effect is affected.

Therefore, the design of inside and outside sleeve polygon can make these two elastic units of first elastic unit 7 and second elastic unit 8 through the connection of intermediate junction axle 6 in the in-process of carrying out friction power consumption, both are in a vertical plane all the time, and the motion of whole elasticity friction subassembly is in this vertical plane all the time promptly, makes two springs form nonlinear restoring force, and the bearing setting on the rethread support for oscillator 5 only receives the nonlinear restoring force that two elasticity subassemblies formed in vertical plane, and the vertical plane that makes elasticity friction subassembly form can rotate in arbitrary direction, and then satisfies the removal demand of oscillator 5 in each direction in the plane.

A method for using a two-dimensional nonlinear energy trap device is provided, wherein the device is the two-dimensional nonlinear energy trap device.

It should be noted that the two-dimensional nonlinear energy sink device of the present invention is preferably a bistable two-dimensional nonlinear energy sink device, so that the vibrator 5 can oscillate rapidly between two stable states, thereby absorbing higher energy, and also exhibits significant oscillating motion over a wide frequency range.

The specific method comprises the following steps:

s1: the friction disc 2 is connected with the outer frame 1 through bolts, and the friction disc 2 is arranged in parallel with the ground; the outer frame 1 is fixedly connected with a main building structure through angle steel 104.

S2: the top plate 102 and the bottom plate 103 on the outer frame 1 are respectively screwed with the first support 9 and the second support 10.

S3: one end of the first elastic unit 7 is hinged with the first support 9, and the other end is a free end; and one end of the second elastic unit 8 is hinged with the second support 10, and the other end is a free end.

S4: the friction ring 3 is fixedly connected with the connecting frame 4, the vibrator 5 is fixedly connected with the connecting frame 4 in a spiral manner through the long bolt 52, so that the friction ring 3, the connecting frame 4 and the vibrator 5 form a whole, and then the whole is fixed on the connecting shaft 6.

S5: the free ends of the first elastic unit 7 and the second elastic unit 8 are hinged with the connecting shaft 6.

S6: the first support 9 and the second support 10 are adjusted so that the first elastic unit 7 and the first elastic unit 8 are inclined not on the same straight line when being extended freely, namely in a vertical plane, and the vibrator 5 has two stable stress balance points.

S7: increasing or decreasing the mass of vibrator 5, and regulating the mass parameter to match the mass parameter of non-linear energy trap vibrator with the mass of main building structure, so as to make the ratio of the damping parameter of non-linear energy trap to the mass parameter smaller than the natural frequency of main structure

Doubling; the vibrator 5 is in a steady state position at this time, i.e. the vibrator 5 is in a force balance, and the first elastic unit 7 and the second elastic unit 8 are in a free elongation state, in the same plane but not in the same straight line.

S8: when the main structure connected with the device is excited by loads such as wind, earthquake and the like, the main structure generates horizontal vibration, and the outer frame 1 connected with the main structure and the main structure synchronously move; the vibrator 5 is not changed in its original position displacement due to its own inertia.

S9: the first elastic unit 7 and the second elastic unit 8 are in a stretching state in the step 2, and the vertical planes of the first elastic unit and the second elastic unit rotate towards the vibration direction of the main structure. After being stretched to a certain extent, the vibrator 5 rotates to the vibration direction with the connecting shaft 6 and the two elastic units under the elastic tension of the two elastic units; at this time, the vibrator 5 receives two elastic units to provide a central nonlinear restoring force, and the vibrator 5 reciprocates, so that the vibrator 5 has a nonlinear force, i.e., the vibrator 5 has a nonlinear stiffness which is not constant, and can generate instantaneous resonance capture with the vibration frequency of the main structure, so as to absorb the vibration of the main structure to the vibrator 5 and the two elastic units.

S91: alternatively, when the vibrator 5 is in the central region, the two elastic units are pressed to provide an outward nonlinear restoring force to the vibrator 5.

S92: alternatively, when the vibrator 5 is far from the central area, the two elastic units are pulled to provide nonlinear restoring force inwards of the vibrator 5.

S10: after the vibrator 5 and the two elastic units have vibration energy, the motion of the vibrator 5 drives the friction ring 3 and the friction disc 2 to slide relatively through the connecting frame 4, so that the friction ring 3 and the friction disc 2 generate sliding friction, the vibration energy is consumed, the vibrator 5 can rapidly oscillate between two stable stress balance states due to the fact that the vibrator 5 has two stable stress balance states in a vertical plane, and therefore higher energy is absorbed, and meanwhile remarkable motion is shown in a wide frequency range.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. The two-dimensional nonlinear energy trap device is characterized by comprising an outer frame (1), a friction disc (2), an elastic friction assembly and a support;

the friction disc (2) is fixed in the outer frame (1) in parallel, an opening is formed in the middle of the friction disc (2), and two ends of the elastic friction assembly penetrate through the opening and are hinged to the top end and the bottom end of the outer frame (1) through the support respectively; the friction component and the friction disc (2) are in sliding friction.

2. The two-dimensional nonlinear energy trap apparatus of claim 1, wherein the elastic friction assembly comprises: the device comprises a friction ring (3), a vibrator (5), a first elastic unit (7) and a second elastic unit (8); the friction ring is characterized in that the first elastic unit (7) and the second elastic unit (8) are connected with each other through a connecting shaft (6), the vibrator (5) is sleeved on the connecting shaft (6), and the friction ring (3) is fixedly connected with the vibrator (5) through a connecting frame (4).

3. The two-dimensional nonlinear energy trap device according to claim 2, wherein the first elastic unit (7) and the second elastic unit (8) are identical in structure; the first elastic unit (7) includes a spring (71), a first spring seat (72), and a second spring seat (73).

4. A two-dimensional nonlinear energy trap apparatus according to claim 3, wherein the first spring seat (72) and the second spring seat (73) each comprise a polygonal sleeve.

5. A two-dimensional non-linear energy well device according to any of claims 2-4, characterized in that the connection frame (4) comprises four support arms, all four of which are arranged downwards.

6. A two-dimensional non-linear energy sink device according to claim 2 or 3, characterized in that the diameter of the friction ring (3) is larger than the diameter of the friction disc (2), both being in sliding friction connection.

7. The two-dimensional nonlinear energy well device according to claim 2, characterized in that the vibrator (5) comprises a mass and a long bolt (52); the mass block (51) is fixed on the connecting frame (4) through a long bolt (52).

8. The two-dimensional nonlinear energy well device according to claim 1 or 2, characterized in that the support comprises a first support (9) and a second support (10); the first support (9) and the second support (10) are respectively connected with the top end and the bottom end of the outer frame (1).

9. The two-dimensional nonlinear energy trap apparatus according to claim 1 or 2, wherein the first mount (9) and the second mount (10) are identical in structure, the first mount (9) comprising a nut (91), a mount rod (92), a bearing outer ring (93) and a bearing inner ring (94).

10. The application method of the two-dimensional nonlinear energy trap device is characterized by comprising the following specific steps:

the outer frame (1), the friction disc (2), the elastic friction assembly and the support are assembled, and vibration energy consumption is carried out;

increasing or decreasing the mass of the vibrator (5), and adjusting the mass parameter so that the nonlinear energy trap vibrator mass parameter is matched with the mass of the connected main building structure; so that the vibrator (5) is in a steady-state position;

when the main structure vibrates, the outer frame (1) and the main structure synchronously move; the vibrator (5) is not changed in displacement at the original position due to its own inertia;

the first elastic unit (7) and the second elastic unit (8) pull the vibrator (5) and the connecting shaft (6) to move towards the vibration direction; the vibrator (5) reciprocates under the central nonlinear restoring force provided by the two elastic units;

the vibrator (5) moves to drive the friction ring (3) and the friction disc (2) to slide relatively through the connecting frame (4), so that the friction ring (3) and the friction disc (2) generate sliding friction, and vibration energy is consumed.

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