CN112128291B - Distributed viscous damping energy consumption device and energy consumption method - Google Patents
Distributed viscous damping energy consumption device and energy consumption method Download PDFInfo
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- CN112128291B CN112128291B CN202010927169.7A CN202010927169A CN112128291B CN 112128291 B CN112128291 B CN 112128291B CN 202010927169 A CN202010927169 A CN 202010927169A CN 112128291 B CN112128291 B CN 112128291B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/30—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium with solid or semi-solid material, e.g. pasty masses, as damping medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/04—Friction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/048—High viscosity, semi-solid pastiness
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Vibration Prevention Devices (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a distributed viscous damping energy consumption device and a working method thereof. The outer sleeve is filled with viscoelastic fluid, the porous energy-consuming support is arranged in the outer sleeve and is immersed in the fluid, the middle partition plate is arranged in the outer sleeve, and when the force transmission rod is stressed, the two parts of the porous energy-consuming support are respectively pulled and stressed to generate deformation, so that the holes in the porous energy-consuming support generate volume change, and accordingly the viscoelastic fluid is sucked and extruded to consume energy. The device realizes distributed viscous energy consumption by simultaneously generating viscoelastic fluid flow through mass holes in the porous energy consumption support, has the advantages of small volume, large output, strong energy consumption capability, simple manufacture and adjustable rigidity, and is beneficial to the industrial application of energy dissipation and shock absorption technology.
Description
Technical Field
The invention mainly relates to the field of structural vibration control, in particular to a distributed viscous damping energy consumption device and an energy consumption method.
Background
Energy dissipation and shock absorption technologies are popular vibration control technologies. Particularly, the viscous energy dissipater is widely applied to vibration control in various fields such as machinery, aviation, ships and the like due to the characteristics of simple structure, no need of maintenance, long service life and the like, and particularly, a large number of viscous energy dissipaters are applied to high-rise building structures in earthquake-prone areas.
However, the traditional viscous damper has large volume and mass and limited damping energy consumption performance, and often has the problem of oil leakage, which is a key bottleneck in popularization and application. How to increase the output of the viscous energy dissipater and improve the energy dissipation capability of the viscous energy dissipater is one of the problems of continuous research of experts and scholars in the field of vibration control.
The prior document explores a method of connecting a plurality of viscous fluid dampers in series and in parallel and using a plurality of chambers to generate viscoelastic fluid flow simultaneously to improve the output and energy consumption performance of the viscous fluid dampers, but the structure is complex and the performance improvement is limited; the device utilizes the sea preset holes in the material, combines the negative Poisson phenomenon, uses a simple structure to generate a large amount of liquid flow, can show the energy dissipation capability of the damper, and further promotes the engineering application of the viscous damper.
Disclosure of Invention
Aiming at the technical problems, the invention provides a distributed viscous damping energy dissipation device and an energy dissipation method, which realize a large amount of simultaneous viscous energy dissipation liquid flows by combining a negative Poisson phenomenon through a large number of holes in an energy dissipation support, and can effectively reduce the volume and the mass of the energy dissipation and shock absorption device, improve the performance of the device and promote the engineering application of the energy dissipation and shock absorption technology.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a distributed viscous damping energy dissipating device comprising:
the upper end and the lower end of the outer sleeve are provided with openings;
the lower end plate is fixedly connected with an opening at the lower end of the outer sleeve in a sealing way;
the upper end plate is fixedly connected with an opening at the upper end of the outer sleeve in a sealing way;
a sealed cavity is formed between the lower end plate and the upper end plate in the outer sleeve, and viscoelastic fluid is filled in the sealed cavity;
the middle partition plate is arranged in the sealed chamber and can move with the inner wall of the outer sleeve in the sealed chamber;
the porous energy-consuming support is arranged in the sealed cavity, is immersed in the viscoelastic fluid, is divided into two parts which are symmetrically arranged up and down by the middle clapboard, and is a first porous energy-consuming support positioned between the upper surface of the middle clapboard and the lower surface of the upper end plate and a second porous energy-consuming support positioned between the lower surface of the middle clapboard and the upper surface of the lower end plate respectively;
the porous energy-consuming support is characterized in that a hole which is arranged to penetrate through the base body is formed in the base body, when the dowel bar is extruded, the porous energy-consuming support deforms to enable the hole to extrude or suck the viscoelastic fluid, and deformation energy of the device is dissipated by utilizing shearing friction when the viscoelastic fluid flows.
The first porous energy dissipation support comprises a plurality of first energy dissipation support units, and the plurality of first energy dissipation support units are uniformly and symmetrically arranged between the upper surface of the middle partition plate and the lower surface of the upper end plate along the outer sleeve axis;
the second porous energy dissipation support comprises a plurality of second energy dissipation support units, and the plurality of second energy dissipation support units are uniformly and symmetrically arranged on the outer sleeve axis between the lower surface of the middle partition plate and the upper surface of the lower end plate.
The upper end plate and the outer sleeve as well as the lower end plate and the outer sleeve are in threaded sealing connection; the dowel bar is connected with the upper end plate in a sliding sealing mode, and the dowel bar moves relatively when being subjected to external force.
The porous energy dissipation support is made of metal, plastic or nylon.
The average diameter of holes in the porous energy dissipation support is 1-10 mm, and the porous energy dissipation support is characterized in that the average diameter of the holes in the porous energy dissipation support is 1-10 mm, the cross section of the holes is flat like peanuts, spindles and ellipses, the centers of the holes are parallel and level along the horizontal and vertical directions of the energy dissipation support and are distributed in a plurality of rows and columns at equal intervals, the long sides of the cross sections of adjacent holes in each row and column are perpendicular to each other and are periodically and alternately distributed in the energy dissipation support, a negative poisson phenomenon is generated when the holes are pulled and pressed, the integral volume change rate of the holes is improved when the holes are stressed, and high-efficiency energy dissipation is realized.
The middle partition plate is connected with the inner wall of the outer sleeve in a sliding and sealing mode, and a plurality of through holes are distributed in the middle partition plate in the circumferential direction.
The invention further discloses an energy consumption method based on the distributed viscous damping energy consumption device,
when the force transmission rod piece and the outer sleeve of the device vibrate to generate displacement due to the external structure, the energy consumption is carried out by the following method:
when the first porous energy dissipation support and the second porous energy dissipation support deform, massive holes inside the porous energy dissipation supports change, viscoelastic fluid is sucked and extruded into the first porous energy dissipation support and the second porous energy dissipation support respectively and simultaneously, and the vibration energy of the upper main body structure is dissipated by utilizing shearing friction when the viscoelastic fluid flows.
The invention further discloses an energy consumption method based on the distributed viscous damping energy consumption device,
when the force transmission rod piece and the outer sleeve of the device vibrate to generate displacement due to the external structure, the energy consumption is carried out by the following method:
secondly, when the device is stressed, the volumes of the chambers positioned on the upper side and the lower side of the middle partition plate in the sealed chamber are changed, and the change of the inner holes of the porous energy dissipation support is combined, so that the internal pressures of viscoelastic fluids in the chambers positioned on the upper side and the lower side of the middle partition plate are different, the viscoelastic fluids penetrate through the preset through holes in the middle partition plate, and the vibration energy is dissipated.
Aiming at different external vibration excitation frequencies, the fluid flow speed and the friction force of the viscoelastic fluid in the holes are regulated and controlled by presetting the hole groups with different pore diameter distributions on the porous energy dissipation support, so that richer nonlinear stiffness damping characteristics are generated, and the main structure vibration is optimally and effectively inhibited.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
1. the invention generates viscoelastic fluid flow and frictional damping energy consumption through a large number of preset holes distributed in the energy consumption support, and simultaneously generates remarkable viscoelastic fluid flow in a large number of holes by using a simple and light structure, thereby greatly improving the damping force and energy consumption capability of the device.
2. According to the invention, the distribution position mode of the holes in the energy dissipation support is adjusted, so that the support material generates a negative Poisson phenomenon, the cross section expands when the support is pulled, and the cross section contracts when the support is pressed, the volume change of the holes is generated to the maximum extent, and the viscoelastic fluid in the device flows to dissipate energy.
3. According to the invention, through presetting the hole groups with different aperture distribution, the fluid flow speed and the friction force of the viscoelastic fluid in the holes are regulated and controlled, richer nonlinear stiffness damping characteristics can be generated aiming at different external vibration excitation frequencies, and the main structure vibration is optimally and effectively reduced and inhibited.
4. According to the invention, through the force transmission path of the adjusting device, the volume contraction and expansion of the two chambers supported by the middle partition plate is opposite to the volume contraction and expansion of the hole in the energy dissipation support, and the internal flow of the viscoelastic fluid in the same chamber is utilized to keep the hydraulic pressure of the chambers relatively constant, so that the requirement on the sealing performance of the device is reduced.
Drawings
FIG. 1 is a schematic perspective view of the device of the present invention,
wherein 1 is an outer sleeve, 21 is a lower end plate, 22 is a porous energy consumption support, 23 is a middle clapboard, 24 is an upper end plate,
3 is a dowel bar;
FIG. 2 is a perspective view of the assembled device of the present invention;
figure 3 is a detail view of the porous energy dissipating support,
wherein 221 is a hole, 231 is a through hole, and 241 is a hole formed on the upper end plate;
FIG. 4 is a front view of the porous energy dissipating support of the present invention;
FIG. 5 is a side view of a porous energy dissipating support of the present invention;
fig. 6 is a top view of a porous energy dissipating support of the present invention.
Detailed Description
To facilitate an understanding of the structure of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
As shown in fig. 1 and 2, the device is composed of an outer sleeve 1, a porous energy-consuming support 2 and a dowel bar 3; wherein, the upper and lower ends of the outer sleeve 1 are provided with screw threads filled with viscoelastic fluid material, and the outer sides of the upper and lower end plates of the porous energy-consuming support are provided with corresponding screw threads
The outer sleeve 1 is connected with the upper end plate and the lower end plate through threads, viscoelastic fluid is filled in the outer sleeve, the porous energy dissipation support is immersed in the fluid and is divided into an upper part and a lower part which are symmetrical by the middle partition plate 23, the two parts are respectively provided with a plurality of porous energy dissipation supports 22 which are respectively connected with the middle partition plate 23, the upper end plate and the lower end plate, a through hole 231 is arranged in the middle partition plate 23, and a large number of holes 221 are formed in the porous energy dissipation supports 22.
As a specific embodiment of the invention, the whole body of the outer sleeve 1 is made of Q345 steel, the outer diameter of the cylinder body 1 is 300mm, the thickness of the cylinder body is 20mm, and the upper end part and the lower end part of the cylinder body are respectively provided with ntp 1/4 threads at 30mm positions.
The porous energy dissipation support 2 is made of nylon 6 materials through molding or additive manufacturing, wherein the diameters of the upper end plate and the lower end plate are 260mm respectively, and the outer edge of the porous energy dissipation support is provided with corresponding ntp 1/4 threads;
the median septum diameter is 255mm, wherein, is equipped with along 8 through-holes that the hoop distributes, through-hole diameter 5mm, threaded hole in the median septum, and the diameter is 30 mm.
In this embodiment, the porous energy dissipation support is 8 rectangular porous energy dissipation supports distributed circumferentially, the cross-sectional dimension of the rectangular porous energy dissipation support is 50mm by 50mm, through holes are formed in the rectangular porous energy dissipation support, and the shape distribution of the holes is shown in fig. 4.
The dowel bar 3 is made of Q345a steel, the lower end of the dowel bar is connected with the internal thread hole of the middle partition plate through threads, and the upper part of the dowel bar is connected with the main structure.
The invention relates to an energy consumption method based on the distributed viscous damping energy consumption device,
when the force transmission rod piece and the outer sleeve of the device vibrate to generate displacement due to the external structure, the energy consumption is carried out by the following method:
when the first porous energy dissipation support and the second porous energy dissipation support deform, massive holes inside the porous energy dissipation supports change, viscoelastic fluid is sucked and extruded into the first porous energy dissipation support and the second porous energy dissipation support respectively and simultaneously, and the vibration energy of the upper main body structure is dissipated by utilizing shearing friction when the viscoelastic fluid flows.
When the force transmission rod piece and the outer sleeve of the device vibrate to generate displacement due to the external structure, the energy consumption is carried out by the following method:
secondly, when the device is stressed, the volumes of the chambers positioned on the upper side and the lower side of the middle partition plate in the sealed chamber are changed, and the change of the inner holes of the porous energy dissipation support is combined, so that the internal pressures of viscoelastic fluids in the chambers positioned on the upper side and the lower side of the middle partition plate are different, the viscoelastic fluids penetrate through the preset through holes in the middle partition plate, and the vibration energy is dissipated.
Aiming at different external vibration excitation frequencies, the fluid flow speed and the friction force of the viscoelastic fluid in the holes are regulated and controlled by presetting the hole groups with different pore diameter distributions on the porous energy dissipation support, so that richer nonlinear stiffness damping characteristics are generated, and the main structure vibration is optimally and effectively inhibited.
Claims (9)
1. A distributed viscous damping energy dissipating device, comprising:
the upper end and the lower end of the outer sleeve are provided with openings;
the lower end plate is fixedly connected with an opening at the lower end of the outer sleeve in a sealing way;
the upper end plate is fixedly connected with an opening at the upper end of the outer sleeve in a sealing way;
a sealed cavity is formed between the lower end plate and the upper end plate in the outer sleeve, and viscoelastic fluid is filled in the sealed cavity;
the middle partition plate is arranged in the sealed chamber, and can move on the inner wall of the outer sleeve in the sealed chamber;
one end of the dowel bar penetrates through the upper end plate and extends into the sealed cavity to be fixedly connected with the middle partition plate, and the other end of the dowel bar extends to the outer side of the upper end plate;
the porous energy-consuming support is arranged in the sealed cavity, is immersed in the viscoelastic fluid, is divided into two parts which are symmetrically arranged up and down by the middle clapboard, and is a first porous energy-consuming support positioned between the upper surface of the middle clapboard and the lower surface of the upper end plate and a second porous energy-consuming support positioned between the lower surface of the middle clapboard and the upper surface of the lower end plate respectively;
the porous energy-consuming support is characterized in that a hole which is arranged to penetrate through the base body is formed in the base body, when the dowel bar is extruded, the porous energy-consuming support deforms to enable the hole to extrude or suck the viscoelastic fluid, and deformation energy of the device is dissipated by utilizing shearing friction when the viscoelastic fluid flows.
2. The distributed viscous damping energy dissipating device of claim 1, wherein the first porous energy dissipating support comprises a plurality of first energy dissipating support elements disposed uniformly and symmetrically about the outer sleeve axis between the upper surface of the middle spacer and the lower surface of the upper end plate;
the second porous energy dissipation support comprises a plurality of second energy dissipation support units, and the plurality of second energy dissipation support units are uniformly and symmetrically arranged on the outer sleeve axis between the lower surface of the middle partition plate and the upper surface of the lower end plate.
3. The distributed viscous damping energy dissipating device of claim 1, wherein the upper end plate and the outer sleeve, and the lower end plate and the outer sleeve are in threaded sealing connection; the dowel bar is connected with the upper end plate in a sliding sealing mode and can move relatively due to external force.
4. The distributed viscous damping energy dissipating device according to claim 1, wherein the material of the porous energy dissipating support is metal or plastic.
5. The distributed viscous damping energy consumption device according to claim 1, wherein the average diameter of the holes on the porous energy consumption support is between 1 mm and 10mm, the cross section of the porous energy consumption support is in a peanut, spindle or oval flat shape, the central connection line of the holes of the plurality of holes is flush with the horizontal direction or the vertical direction of the energy consumption support, the holes are distributed in a plurality of rows and columns at equal intervals, the long sides of the cross sections of the holes adjacent to each other in each row and column are mutually perpendicular and are periodically and alternately distributed in the energy consumption support, a negative poisson phenomenon is generated when the holes are pulled and pressed, the integral volume change rate of the holes is improved when the holes are stressed, and high-efficiency energy consumption is realized.
6. The distributed viscous damping energy dissipation device of claim 1, wherein the middle partition plate is connected with the inner wall of the outer sleeve in a sliding and sealing mode, and a plurality of through holes are distributed in the middle partition plate in the circumferential direction.
7. An energy consumption method based on the distributed viscous damping energy consumption device of any one of claims 1-5,
when the force transmission rod piece and the outer sleeve of the device vibrate to generate displacement due to the external structure, the energy consumption is carried out by the following method:
when the first porous energy consumption support and the second porous energy consumption support deform, massive holes inside the porous energy consumption supports change, extrusion viscoelastic fluid is simultaneously sucked into the first porous energy consumption support, the extrusion viscoelastic fluid is simultaneously sucked into the second porous energy consumption support, and the vibration energy of the device is dissipated by utilizing the shearing friction when the viscoelastic fluid flows.
8. An energy consumption method based on the distributed viscous damping energy consumption device of claim 6,
when the force transmission rod piece and the outer sleeve of the device vibrate to generate displacement due to the external structure, the energy consumption is carried out by the following method:
secondly, when the device is stressed, the volumes of the chambers positioned on the upper side and the lower side of the middle partition plate in the sealed chamber are changed, and the volume change of the inner hole of the porous energy consumption support is combined, so that the internal pressures of viscoelastic fluids in the chambers positioned on the upper side and the lower side of the middle partition plate are different, and the viscoelastic fluids penetrate through the preset through hole in the middle partition plate to dissipate vibration energy.
9. The method for dissipating energy of a distributed viscous damping energy dissipating device according to claim 7,
aiming at different external vibration excitation frequencies, the hole groups with different pore size distributions are preset on the porous energy dissipation support, the fluid flow speed and the friction force of the viscoelastic fluid in the holes are regulated and controlled, richer nonlinear stiffness damping characteristics are generated, and the vibration of the device is effectively reduced and inhibited.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010927169.7A CN112128291B (en) | 2020-09-07 | 2020-09-07 | Distributed viscous damping energy consumption device and energy consumption method |
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| CN202010927169.7A CN112128291B (en) | 2020-09-07 | 2020-09-07 | Distributed viscous damping energy consumption device and energy consumption method |
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| CN112128291A CN112128291A (en) | 2020-12-25 |
| CN112128291B true CN112128291B (en) | 2022-03-11 |
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| CN113187848B (en) * | 2021-05-27 | 2022-06-03 | 哈尔滨工业大学 | Buffer device |
| CN114016633A (en) * | 2021-12-07 | 2022-02-08 | 河北工业大学 | Buckling restrained brace with negative Poisson ratio effect |
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| DE202008000984U1 (en) * | 2008-01-23 | 2008-03-20 | Härtwich, Erwin | Spring element with damping properties |
| CN103671677A (en) * | 2013-12-24 | 2014-03-26 | 北京九州一轨隔振技术有限公司 | Viscous damper |
| CN204491402U (en) * | 2015-03-17 | 2015-07-22 | 河南交通职业技术学院 | A kind of elastic gap formula viscous damper used on highway bridge |
| CN208331094U (en) * | 2018-06-29 | 2019-01-04 | 青岛海泰科机械钢构有限公司 | A kind of improved damping energy consumption cylinder of new structure |
| CN111075880A (en) * | 2019-12-30 | 2020-04-28 | 浙江大学 | Damper based on paper folding rebounding mechanism |
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