CN219221143U - Tuned mass damper shock insulation device for cultural relics and equipment - Google Patents
Tuned mass damper shock insulation device for cultural relics and equipment Download PDFInfo
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- CN219221143U CN219221143U CN202320389441.XU CN202320389441U CN219221143U CN 219221143 U CN219221143 U CN 219221143U CN 202320389441 U CN202320389441 U CN 202320389441U CN 219221143 U CN219221143 U CN 219221143U
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Abstract
The utility model discloses a tuned mass damper vibration isolation device used for cultural relics and equipment, which comprises a tuned mass damper, a vibration isolation plate and a sliding structure, wherein the vibration isolation plate is arranged up and down at intervals to form an upper vibration isolation space and a lower vibration isolation space, the tuned mass damper and the sliding structure are arranged in the upper vibration isolation space and the lower vibration isolation space, the moving directions of the tuned mass damper positioned in the upper vibration isolation space and the tuned mass damper positioned in the lower vibration isolation space are vertical, the moving directions of the sliding structure positioned in the upper vibration isolation space and the sliding structure positioned in the lower vibration isolation space are vertical, and the moving directions of the tuned mass damper positioned in the same vibration isolation space and the sliding structure are the same. The tuned mass damper is added to provide additional damping for the vibration isolation device, so that the vibration response of the upper structure under the earthquake is effectively controlled; the stability and the safety of the shock absorption effect of the shock insulation device are improved.
Description
Technical Field
The utility model relates to the technical field of shock insulation devices, in particular to a tuned mass damper shock insulation device used for cultural relics and equipment.
Background
The shock insulation device is required to be arranged when the cultural relics and the equipment are collected in the libration mode so as to achieve the shock insulation effect, and then the protection effect is achieved. The common vibration isolation device isolates the earthquake effect by arranging a linear slide rail or a slide rail, and dissipates the earthquake energy by arranging a damper or a friction device, so that the displacement of the vibration isolation device during working is reduced. However, such shock-insulating devices often cannot significantly reduce the displacement, acceleration and velocity response of the superstructure at the same time, and the shock-absorbing effect may also have a large difference due to the variability of the earthquake. When the earthquake action is large, the traditional vibration isolation device can generate large horizontal displacement, and obvious overturning bending moment is generated on the upper structure, so that the upper structure is damaged.
The common vibration isolation device is provided with a double-layer vibration isolation device and a single-layer vibration isolation device, and the vibration isolation and shock absorption effects are realized through the movement in the orthogonal direction. The damping device disclosed in the prior patent is provided with a bidirectional damping effect, so that protection of cultural relics and equipment is realized. But above-mentioned device all is through the slider motion on the track, offset vibration energy through the displacement, needs great displacement to play the shock insulation effect on the whole, leads to under limited space, and shock insulation device either has great size or sets up longer stroke, and along with the increase of stroke, security and stability then reduce by a wide margin, very easily take place deformation and overturns problem. The utility model provides a tuned mass damper vibration isolation device used for cultural relics and equipment, which solves the problems of unstable damping effect and large overturning bending moment of the traditional vibration isolation device.
Disclosure of Invention
The utility model provides a tuned mass damper vibration isolation device for cultural relics and equipment, which can stably reduce the displacement, acceleration and speed response of an upper structure and has good variability performance on earthquake and good anti-overturning capability by reasonably setting parameters of a vibration isolation platform and a tuned mass damper.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the tuned mass damper vibration isolation device comprises a tuned mass damper, a vibration isolation plate and a sliding structure, wherein the vibration isolation plate is arranged up and down at intervals to form an upper vibration isolation space and a lower vibration isolation space; the sliding structure comprises a pulling-resistant sliding part and a sliding rail, wherein the pulling-resistant sliding part and the sliding rail are respectively arranged on the corresponding shock insulation plates, an arc-shaped chute is arranged on the sliding rail, and the pulling-resistant sliding part is movably connected in the arc-shaped chute of the sliding rail.
Further, the sliding structures are arranged in pairs, two pairs of sliding structures are arranged in the same shock insulation space, and the sliding structures arranged in pairs are arranged in parallel and are arranged oppositely.
Further, the arc chute on the sliding rail is a U-shaped chute and is arranged on the side surface of the sliding rail; the anti-pulling sliding piece comprises a sliding seat, a rotating bearing and a rotating shaft, wherein the sliding seat is fixedly connected to the shock insulation plate, the rotating bearing is movably connected to the sliding seat through the rotating shaft, and the rotating bearing is located in the arc-shaped sliding groove.
Further, the sliding structure is arranged on the side edge of the shock insulation plate, the middle parts of the same pair of sliding structures are arranged in a staggered mode, and the outer ends of the sliding rails are flush with the side edge of the shock insulation plate.
Further, the tuning mass damper comprises an energy consumption part and a movement part, wherein the movement part is movably connected with the energy consumption part, the energy consumption part is connected with the shock insulation plate positioned below, and the movement part is connected with the shock insulation plate positioned above.
Further, the tuned mass dampers include rotary tuned mass dampers and rack and pinion tuned mass dampers.
Further, the tuning mass dampers are located between the sliding structures arranged in pairs, and the tuning mass dampers are located in the middle of the shock insulation plates.
Further, the lower shock insulation space is provided with a lower foot below the bottom shock insulation plate.
Further, the energy consumption part and the motion part are connected with the shock insulation plate through the connecting lug plate.
Further, the shock insulation plate at the upper part of the upper shock insulation space is a transparent plate.
The utility model has the following beneficial effects:
adding a tuned mass damper to provide additional damping for the vibration isolation device, and effectively controlling the vibration response of the upper structure under the earthquake; the arc-shaped sliding grooves are formed in the sliding track, and the anti-pulling sliding piece performs pendulum motion in the arc-shaped sliding grooves, so that the vibration period of the upper structure is irrelevant to the structure quality, and the stability of the vibration period of the upper structure is realized. The stability of the damping effect of the shock insulation device is improved; the sliding structure has the pulling-resistant function, has good tensile capacity, and reduces the movement stroke of the pulling-resistant sliding part by matching with the combined action of the tuned mass damper, so that when the input excitation is large, the upper structure cannot rollover due to the overlarge overturning bending moment.
Drawings
FIG. 1 is a schematic front view of the overall structure of the present utility model;
FIG. 2 is a side view of the overall structure of the present utility model;
FIG. 3 is a schematic diagram of an upper seismic isolation space employing a rack and pinion tuned mass damper in accordance with the present utility model;
FIG. 4 is a schematic diagram of an upper seismic isolation space employing a rotary tuned mass damper in accordance with the present utility model;
FIG. 5 is a schematic view of the lower seismic isolation space structure of the present utility model;
FIG. 6 is a schematic view of a sliding structure arrangement according to the present utility model;
FIG. 7 is a schematic front view of a sliding structure of a single-sided arc chute according to the present utility model;
FIG. 8 is a schematic side view of a sliding structure of a single-sided arc chute of the present utility model;
FIG. 9 is a schematic view of a sliding structure of an outer double-sided arc chute according to the present utility model;
FIG. 10 is a schematic view of a sliding structure of an inner double-sided arc chute according to the present utility model;
FIG. 11 is a schematic view of the structure of the pull-out resistant slider of the present utility model;
FIG. 12 is a schematic diagram of a tuned mass damper of the present utility model;
FIG. 13 is a schematic diagram of a viscous fluid rotary tuned mass damper configuration of the present utility model;
FIG. 14 is a schematic view of an eddy current rotary tuned mass damper configuration of the present utility model;
FIG. 15 is a schematic diagram of a DC motor type rotary tuned mass damper configuration of the present utility model;
FIG. 16 is a schematic view of a rack and pinion tuned mass damper configuration of the present utility model;
FIG. 17 is a schematic diagram of the energy consumption of a rack and pinion tuned mass damper of the present utility model;
FIG. 18 is a graph showing the displacement response of the present utility model versus the displacement response of an uncontrolled system;
FIG. 19 is a schematic diagram of the upper acceleration comparison of the present utility model and an uncontrolled system;
FIG. 20 is a schematic diagram of the horizontal displacement contrast of the present utility model and an uncontrolled system;
FIG. 21 is a graph showing the acceleration amplitude versus the uncontrolled system of the present utility model;
FIG. 22 is a graph showing the displacement amplitude versus the uncontrolled system of the present utility model;
fig. 23 is a schematic diagram of a sliding structure according to the present utility model.
Reference numerals: 1-tuning mass damper, 2-shock insulation plate, 3-sliding structure, 31-anti-pulling sliding piece and 32-sliding track.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of this patent, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the patent and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and are therefore not to be construed as limiting the patent.
As shown in fig. 1, 2, 3, 4 and 5, a tuned mass damper vibration isolation device used by cultural relics and equipment comprises a tuned mass damper 1, a vibration isolation plate 2 and a sliding structure 3, wherein the vibration isolation plate 2 is arranged at an upper and lower interval to form an upper vibration isolation space and a lower vibration isolation space, the tuned mass damper 1 and the sliding structure 3 are arranged in the upper vibration isolation space and the lower vibration isolation space, the moving directions of the tuned mass damper 1 in the upper vibration isolation space and the tuned mass damper 1 in the lower vibration isolation space are vertical, the moving directions of the sliding structure 3 in the upper vibration isolation space and the sliding structure 3 in the lower vibration isolation space are vertical, and the moving directions of the tuned mass damper 1 and the sliding structure 3 in the same vibration isolation space are the same.
According to the utility model, the tuning mass damper 1 is additionally arranged, when vibration is transmitted to the vibration isolation device, the tuning mass damper 1 and the sliding structure 3 move together, wherein the tuning mass damper 1 reduces the movement stroke of the sliding structure 3 by greatly consuming seismic energy, reduces the movement amplitude of the whole vibration isolation device, and the tuning mass damper 1 further enhances the connection strength and stability between the upper vibration isolation plate 2 and the lower vibration isolation plate 2, thereby improving the structural safety and stability.
As shown in fig. 23, the pull-out resistant sliding part 31 moves in an arc chute with a certain curvature on the sliding track 32, so that the upper structure has the characteristic of swinging under the action of gravity, i.e. the vibration period of the upper structure is irrelevant to the structure quality, and the stabilization of the vibration period of the upper structure is realized. The principle is as follows: since the sliding member can greatly reduce frictional resistance during sliding, it can be considered that the horizontal restoring force F of the system is generated only by the slope.
Horizontal restoring force F:
when θ→0, the above formula can be further simplified to:
horizontal stiffness K:
horizontal vibration period T:
meanwhile, the anti-pulling structure is adopted between the anti-pulling sliding piece 31 and the sliding rail 32, so that the anti-pulling device has an anti-pulling effect and good tensile capacity, and the phenomenon that the upper structure turns on one side due to overlarge overturning bending moment is avoided when input excitation is large is realized.
As shown in fig. 6, 7 and 8, the sliding structure 3 includes a pull-out resistant sliding member 31 and a sliding rail 32, where the pull-out resistant sliding member 31 and the sliding rail 32 are respectively disposed on the vertically corresponding shock insulation plates 2, an arc chute is disposed on the sliding rail 32, and the pull-out resistant sliding member 31 is movably connected in the arc chute of the sliding rail 32.
As shown in fig. 8, the pull-out resistant sliding member 31 preferably forms a pendulum structure in the arc chute of the sliding rail 32, and has pendulum characteristics such that the vibration period of the upper structure is independent of the structure mass, and is only dependent on the radius of curvature of the sliding rail, thereby achieving stabilization of the vibration period of the upper structure.
As shown in fig. 4, 5 and 6, further, the sliding structures 3 are arranged in pairs, two pairs of sliding structures 3 are arranged in the same vibration isolation space, the same pair of sliding structures 3 are arranged in parallel inside and outside and are arranged oppositely, the sliding structures are arranged in a staggered mode inside and outside and are arranged in a staggered mode left and right, the middle parts of the sliding structures are overlapped, the sliding distance of the vibration isolation device is increased through staggered arrangement of the same pair of sliding structures 3, and the structure of the vibration isolation device can be more compact.
As shown in fig. 7, 8, 9 and 10, further, the arc chute on the sliding rail 32 is a U-shaped chute, and is disposed on a side surface of the sliding rail 32; as shown in fig. 11, the anti-pulling sliding part 31 includes a sliding seat, a rolling bearing and a rotating shaft, the sliding seat is fixedly connected to the shock insulation plate 2, the rolling bearing is movably connected to the sliding seat through the rotating shaft, the rolling bearing is located in the arc chute, and when displacement occurs, the rolling bearing slides in the arc chute of the sliding rail 32 and swings along the curved surface of the arc chute.
As shown in fig. 7, 9 and 10, it is preferable that the sliding track 32 adopts a single-sided arc chute and a double-sided arc chute, and as shown in fig. 7 and 8, the single-sided arc chute is that an arc chute is provided on only one side surface of the sliding track 32; as shown in fig. 9 and 10, the two-sided arc chute is an arc chute provided on both side surfaces of the slide rail 32 or two arc chutes are provided opposite to each other.
As shown in fig. 4 and 5, further, the sliding structures 3 are disposed on the side edges of the shock insulation plates 2, the middle parts of the same pair of sliding structures 3 are arranged in a staggered manner, and the outer ends of the sliding rails 32 are flush with the side edges of the shock insulation plates 2.
As shown in fig. 3 and 4, the tuned mass damper 1 further includes an energy consumption part and a motion part, the motion part is movably connected with the energy consumption part, the energy consumption part is connected with the shock insulation plate 2 located below, and the motion part is connected with the shock insulation plate 2 located above.
As shown in fig. 13, 14, 15, 16 and 17, the energy dissipation portion is preferably a viscous fluid type, an eddy current type or a direct current motor type energy dissipation structure, the movement portion is an elastic connection lug plate, and the elastic connection lug plate moves in the energy dissipation structure to dissipate kinetic energy transferred by vibration through the energy dissipation portion.
As shown in fig. 12, the tuning mass damper is generally classified into TVMD, TID and general-purpose type according to the connection manner of the basic mechanical element, and c is defined as the general-purpose tuning mass damper r When=0, then the degradation is in TID model, when c in the universal tuned mass damper k When=0, then the TVMD model is degraded.
As shown in fig. 13, 14, 15, 16, and 17, the tuned mass damper 1 further includes a rotary tuned mass damper and a rack and pinion tuned mass damper, and the rotary tuned mass damper and/or the rack and pinion tuned mass damper are/is selected as the tuned mass damper 1 disposed in the upper and lower seismic isolation spaces. The rotary tuned mass damper realizes energy consumption through relative rotation of the energy consumption part and the motion part, and common types are viscous fluid type, eddy current type and direct current motor type.
As shown in fig. 13, the rotary tuned mass damper using viscous fluid energy consumption is a TVMD model,
m r ＝S 2 (I+I 0 )；
α r ≈1；
wherein, the liquid crystal display device comprises a liquid crystal display device,
i is the moment of inertia of the rotary flywheel about the axis, kg×m 2 ；
I 0 For generating the sum of moments of inertia of rotating parts other than rotating flywheels, e.g. ball screw nuts, rotating inner cylinders, kg×m 2 ；
d is the outer diameter of the rotary inner cylinder and m;
v is the dynamic viscosity of the viscous fluid material, m 2 /s；
A is the side surface area of the rotary inner cylinder, m 2 ；
y is the distance between the inner cylinder and the outer cylinder, m;
L d and m is the lead of the ball screw.
As shown in fig. 14, the rotary tuned mass damper using the eddy current energy consumption is a TVMD model,
m r ＝S 2 (I+I 0 )；
α r ≈1；
wherein, the liquid crystal display device comprises a liquid crystal display device,
i is a rotating flywheel winding shaftMoment of inertia of line kg×m 2 ；
I 0 For generating the sum of moments of inertia of rotating parts other than the rotating flywheel, e.g. ball screw nuts, rotating inner cylinders, rotating conductor plates, kg×m 2 ；
R is a constant and is related to whether the magnetic conduction plate is installed or not and the thickness of the magnetic conduction plate;
d i m is the distance of the ith pair of permanent magnets with respect to the rotation center;
B i the magnetic induction intensity of the ith pair of permanent magnets on the rotating conductor plate is T;
A i for the projection area of the ith pair of permanent magnets on the rotating conductor plate, m 2 ；
n is the total logarithm of the permanent magnets installed in pairs;
sigma is the conductivity of the rotating conductor plate, S/m.
As shown in fig. 15, the rotary tuned mass damper using the direct current motor type energy consumption is a TVMD model,
m r ＝S 2 (I+I 0 )；
α r ≈1；
wherein, the liquid crystal display device comprises a liquid crystal display device,
i is the moment of inertia of the rotary flywheel about the axis, kg×m 2 ；
I 0 For generating the sum of moments of inertia of rotating parts other than rotating flywheels, e.g. ball screw nuts, rotating inner cylinders, couplings, gears, motor rotors, kg×m 2 ；
Alpha is the gain of the speed reducer;
K E is a back EMF constant, vs/rad;
K T is torque constant, nm/A;
r is the resistance value of an external resistor, omega;
R 0 is the internal resistance value of the direct current motor, omega.
As shown in fig. 16 and 17, the rack and pinion tuned mass damper converts axial movement in the connection direction into rotation on the gear through the cooperation of the gear and the rack; the large gear and the small gear are fixed on the shaft through keys to form gear sets with the same angular velocity, and then through the transmission fit of a plurality of gear sets, the angular movement on the rotary flywheel and the energy consumption device can be amplified by a plurality of times to realize energy consumption, and common types are viscous fluid type, electric vortex type and direct current motor type.
Further, the tuned mass dampers 1 are located between the sliding structures 3 provided in pairs, and the tuned mass dampers 1 are located in the middle of the shock insulation plate 2.
Further, the lower shock insulation space is provided with a foundation below the bottom shock insulation plate 2.
Further, the energy consumption part and the motion part are connected with the shock insulation plate 2 through the connecting ear plate.
Further, the shock insulation plate 2 at the upper part of the upper shock insulation space is a transparent plate.
As shown in fig. 18, 19, 20, 21 and 22, in the specific embodiment of the present utility model, the vibration isolation device provided with the tuned mass damper 1 is a controlled system, the vibration isolation device not provided with the tuned mass damper 1 is an uncontrolled system, and the controlled system compares the displacement response and the acceleration response of the uncontrolled system with those of the Elcentro-NS-500gal, so that the control effect of the controlled system using the tuned mass damper is remarkable as shown in the figure.
The main parameters in the model are as follows:
mass m of main body structure p ＝350.0kg；
The main body structural rigidity k= 1533.7N/m;
the main structure period t=3.0 s;
equivalent inertial mass m r ＝175.0kg；
Damping coefficient c r ＝518.0Nsm -1 ；
Damping index alpha r ＝1.0；
Support stiffness k b ＝1535.0N/m；
Damping coefficient c k ＝0。
As shown in fig. 18, the vibration isolation device of the tuned mass damper 1 effectively controls the resonance response of the structure as compared with the uncontrolled system, while not producing significant amplification of low frequency loads and high frequency loads.
As shown in fig. 19, the pull-out resistant slider 31 moving in the arc chute having a certain curvature can extend the vibration cycle of the upper article to a relatively stable value, maintaining the stability of the structure.
As shown in fig. 20, 21 and 22, the controlled system has better control effect on displacement response and acceleration response than the uncontrolled system.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. The tuned mass damper vibration isolation device for the cultural relics and the equipment is characterized by comprising a tuned mass damper (1), a vibration isolation plate (2) and a sliding structure (3), wherein the vibration isolation plate (2) is arranged at intervals up and down to form an upper vibration isolation space and a lower vibration isolation space, the tuned mass damper (1) and the sliding structure (3) are arranged in the upper vibration isolation space and the lower vibration isolation space, the moving directions of the tuned mass damper (1) positioned in the upper vibration isolation space and the tuned mass damper (1) positioned in the lower vibration isolation space are vertical, the moving directions of the sliding structure (3) positioned in the upper vibration isolation space and the sliding structure (3) positioned in the lower vibration isolation space are vertical, and the moving directions of the tuned mass damper (1) positioned in the same vibration isolation space and the moving directions of the sliding structure (3) are the same; the sliding structure (3) comprises a pulling-resistant sliding part (31) and a sliding track (32), wherein the pulling-resistant sliding part (31) and the sliding track (32) are respectively arranged on the shock insulation plates (2) corresponding to each other up and down, an arc-shaped chute is arranged on the sliding track (32), and the pulling-resistant sliding part (31) is movably connected in the arc-shaped chute of the sliding track (32);
the sliding structures (3) are arranged in pairs, two pairs of sliding structures (3) are arranged in the same shock insulation space, and the sliding structures (3) arranged in pairs are arranged in parallel and are arranged oppositely;
the tuning mass damper (1) comprises an energy consumption part and a movement part, wherein the movement part is movably connected with the energy consumption part, the energy consumption part is connected with the shock insulation plate (2) positioned below, and the movement part is connected with the shock insulation plate (2) positioned above.
2. The tuned mass damper shock insulation device for cultural relics and equipment according to claim 1, wherein the shock insulation device is characterized by: the arc chute on the sliding rail (32) is a U-shaped chute and is arranged on the side surface of the sliding rail (32); the sliding track (32) comprises a sliding seat, a rotating bearing and a rotating shaft, wherein the sliding seat is fixedly connected to the shock insulation plate (2), the rotating bearing is movably connected to the sliding seat through the rotating shaft, and the rotating bearing is located in the arc-shaped sliding groove.
3. The tuned mass damper shock insulation device for cultural relics and equipment according to claim 1, wherein the shock insulation device is characterized by: the sliding structures (3) are arranged on the side edges of the shock insulation plates (2), the middle parts of the same pair of sliding structures (3) are arranged in a staggered mode, and the outer ends of the sliding rails (32) are flush with the side edges of the shock insulation plates (2).
4. The tuned mass damper shock insulation device for cultural relics and equipment according to claim 1, wherein the shock insulation device is characterized by: the tuned mass damper (1) comprises a rotary tuned mass damper and a rack and pinion tuned mass damper.
5. The tuned mass damper shock insulation device for cultural relics and equipment according to claim 1, wherein the shock insulation device is characterized by: the tuned mass dampers (1) are located between sliding structures (3) arranged in pairs, and the tuned mass dampers (1) are located in the middle of the shock insulation plates (2).
6. The tuned mass damper shock insulation device for cultural relics and equipment according to claim 1, wherein the shock insulation device is characterized by: and the lower bottom shock insulation plate (2) of the lower shock insulation space is provided with a foundation.
7. The tuned mass damper shock insulation device for cultural relics and equipment according to claim 1, wherein the shock insulation device is characterized by: the energy consumption part and the motion part are connected with the shock insulation plate (2) through the connecting lug plate.
8. The tuned mass damper shock insulation device for cultural relics and equipment according to claim 1, wherein the shock insulation device is characterized by: the shock insulation board (2) at the upper part of the upper shock insulation space is a transparent board.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320389441.XU CN219221143U (en) | 2023-03-02 | 2023-03-02 | Tuned mass damper shock insulation device for cultural relics and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320389441.XU CN219221143U (en) | 2023-03-02 | 2023-03-02 | Tuned mass damper shock insulation device for cultural relics and equipment |
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