CN108317201A - A kind of multistable shock isolating apparatus - Google Patents
A kind of multistable shock isolating apparatus Download PDFInfo
- Publication number
- CN108317201A CN108317201A CN201810020115.5A CN201810020115A CN108317201A CN 108317201 A CN108317201 A CN 108317201A CN 201810020115 A CN201810020115 A CN 201810020115A CN 108317201 A CN108317201 A CN 108317201A
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- China
- Prior art keywords
- shell
- housing
- bar
- pressure
- top board
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Classifications
-
- 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
- F16F7/00—Vibration-dampers; Shock-absorbers
-
- 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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/063—Negative stiffness
-
- 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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
Abstract
The present invention provides a kind of multistable shock isolating apparatus, including：Pressure-bearing straight-bar, top board, lower platen, Hookean spring, the first shell and second housing；The pressure-bearing straight-bar clamping is between the top board and lower platen, the Hookean spring tension is connected between the top board and lower platen, the long overlapping of axles of first shell and second housing, short axle, which are vertically intersected, to be combined together, the upper surface of the second housing is located at the downside of the upper surface of first shell, the lower face of the second housing is located at the downside of the lower face of first shell, the top board is tightly attached to the downside of the upper surface of the second housing, and the lower platen is tightly attached to the upside of the lower face of first shell.There is high rigidity, when impact loading, elastic buckling occurs for pressure-bearing straight-bar, and multiple stabilities occur successively, generates negative stiffness, and device overall stiffness declines therewith, can effectively reduce the acceleration responsive for being isolated equipment or structure when of the invention static.
Description
Technical field
The present invention relates to anti-impact device technical fields, more particularly to a kind of multistable shock isolating apparatus.
Background technology
Shipbuilding and offshore engineering structure bears all kinds of load for a long time, wherein environmental load (such as attacking, substantially heaving) and
Other external loads etc. (such as explosion) necessarily so that charging appliance bears the repeated action of high acceleration shock, each class formation,
Damage is built up in material, eventually leads to structure destruction and equipment failure, is effectively implemented impact isolating and is had become guarantee ocean
With the great demand of Marine engineering equipment Reliability.
Traditional design method always first carries out Vibration Absorbing System Design, then carries out shock resistance check.Usual vibration isolator rigidity compared with
It is small and there is preferable impact isolating rate, but larger relative displacement is will produce, is limited usually using limiter in engineering
Its relative displacement, since rigidity is uprushed, which can deteriorate impact isolating rate again；On the other hand, shipbuilding and offshore engineering is equipped
Dead weight is all larger, and to ensure to firmly install, support device must have certain rigidity, but high rigidity is to dynamic loads isolation
It is very unfavorable.Therefore, this field need a kind of static high rigidity, dynamic Low rigidity shock isolating apparatus.
Invention content
An object of the present invention is to provide a kind of static high rigidity that can be effective against percussion, dynamic are low just
The shock isolating apparatus of degree.
The present invention provides a kind of multistable shock isolating apparatus, including：Pressure-bearing straight-bar, top board, lower platen, linear bullet
Spring, the first shell and second housing；Between the top board and lower platen, the Hookean spring is drawn the pressure-bearing straight-bar clamping
It is close to and is connected between the top board and lower platen, long overlapping of axles, the short axle of first shell and second housing are vertically handed over
Fork is combined together, and the upper surface of the second housing is located at the downside of the upper surface of first shell, the second housing
Lower face be located at first shell lower face downside, the top board is tightly attached to the upper surface of the second housing
Downside, the lower platen are tightly attached to the upside of the lower face of first shell；The downside of the upper surface of first shell has
There is the first protrusion, there is first through hole on the lower face of first shell, the upside of the lower face of the second housing has
Second protrusion, has the second through-hole on the upper surface of the second housing, and first protrusion is telescopically assemblied in described the
In two through-holes, second protrusion is telescopically assemblied in the first through hole, and the height of first protrusion is more than described
The height of the depth of second through-hole, second protrusion is more than the depth of the first through hole, and first protrusion passes through described
Second through-hole is against on the top board, and second protrusion is against across the first through hole on the lower platen；Wherein, institute
The rigidity for stating the first shell and second housing is more than the rigidity of the pressure-bearing straight-bar.
Further, the Hookean spring has two or more, and is equably connected around the pressure-bearing straight-bar
Between the top board and lower platen, the Hookean spring is parallel to the pressure-bearing straight-bar.
Further, the rigidity of first shell and second housing is 20-40 times of the rigidity of the pressure-bearing straight-bar.
Further, the long overlapping of axles of the installation site of the pressure-bearing straight-bar and first shell and second housing.
Further, the upside of the upper surface of first shell is fixedly connected with structure is isolated, the second housing
The downside of lower face be fixedly connected with support construction；Or the upside of the upper surface of first shell is fixed with support construction
Connection, the downside of the lower face of the second housing is fixedly connected with structure is isolated.
Further, first shell is identical with the structure of second housing, is rectangular frame shape structure.
Further, the material of the pressure-bearing straight-bar, top board, lower platen, Hookean spring, the first shell and second housing
It is steel.
Further, the pressure-bearing straight-bar be eccentric structure compression bar, the compressive load being subject to gradually it is increased during,
There is local buckling configuration and curved configuration successively in pressure-bearing straight-bar.
When in use, the axial direction of device is consistent with load action direction for apparatus of the present invention, if external tensile load acts on
The upper end of first shell, second housing are fixed, and the first shell is moved along draw direction, and top board displacement is by the upper of second housing
End constraint, pressure-bearing straight-bar bears compression at this time.If the first shell is moved along compression direction, second housing is fixed, and is connected to
The first protrusion on the downside of the upper surface of one shell passes through the second through-hole of the upper surface of second housing that load is acted on top board
On, the lower platen displacement positioned at pressure-bearing straight-bar lower end is constrained by second housing lower end, on the upside of the lower face of second housing
Second protrusion passes through the first through hole of the lower face of the first shell to resist the lower platen, and pressure-bearing straight-bar is still subject to press and answer at this time
Power.The rigidity of first shell and second housing is much larger than pressure-bearing straight-bar, the deformation of the first shell and second housing in above procedure
Ignore.It can be seen that no matter the first shell of device upper end bear tension and compression effect or second housing lower end bear tension and compression effect, hold
Straightening bar all bears compression, when load reaches the elastic buckling threshold value of pressure-bearing straight-bar, that is, regime shift occurs, by straight-bar configuration
It is converted to curved configuration, straight-bar is recoiled to by curved configuration when unloading.Pressure-bearing straight-bar becomes bending carrying from axis pressure carrying, just
Degree substantially reduces, and is then sprung back from low-potential energy state when unloading, therefore there are phase differences between displacement-load, that is, generates lag and dissipate, this
External force, which is done work, during one is first changed into the elastic potential energy of straight-bar, and after regime shift, the reduction of curved bar rigidity makes its potential energy store energy
Power is greatly reduced, and is converted to kinetic energy after original potential energy release, kinetic energy is then dissipated in a manner of Coulomb damping or acoustic energy, in structure softening
Under the collective effect to dissipate with hysteresis, external high acceleration, which encourages, is isolated, and being isolated equipment acceleration will substantially reduce.This
Invention is made of structure steel material, has high rigidity when static, and when impact loading, elastic buckling occurs for pressure-bearing straight-bar,
Multiple stabilities occur successively, generate negative stiffness, and device overall stiffness declines, can effectively reduce and be isolated equipment therewith
Or the acceleration responsive of structure.To realize the impact isolating function of static high rigidity, dynamic Low rigidity.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or practice through the invention is recognized.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of multistable shock isolating apparatus of the embodiment of the present invention；
Fig. 2 a are the structural schematic diagram of the pressure-bearing straight-bar straight configuration of the embodiment of the present invention；
Fig. 2 b are the structural schematic diagram of the pressure-bearing straight-bar local buckling state of the embodiment of the present invention；
Fig. 2 c are the structural schematic diagram of the pressure-bearing straight-bar flexuosity of the embodiment of the present invention；
Fig. 3 is the load-displacement curves figure of the pressure-bearing straight-bar of the embodiment of the present invention, wherein load unit N, displacement list
Position is m.
In attached drawing label for：
1 pressure-bearing straight-bar
2 top boards
3 lower platens
4 Hookean springs
5 first shells
51 first protrusions
6 second housings
61 second through-holes
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
An embodiment of the present invention provides a kind of multistable shock isolating apparatus, as shown in Figure 1, including：Pressure-bearing straight-bar 1, on
Pressing plate 2, lower platen 3, Hookean spring 4, the first shell 5 and second housing 6；1 clamping of pressure-bearing straight-bar is in 2 He of the top board
Between lower platen 3, the tension of the Hookean spring 4 is connected between the top board 2 and lower platen 3, first shell 5 and the
Long overlapping of axles, the short axle of two shells 6, which are vertically intersected, to be combined together, and the upper surface of the second housing 6 is located at described first
The downside of the upper surface of shell 5, the lower face of the second housing 6 is located at the downside of the lower face of first shell 5, described
Top board 2 is tightly attached to the downside of the upper surface of the second housing 6, and the lower platen 3 is tightly attached to the lower end of first shell 5
The upside in face；The downside of the upper surface of first shell 5 has the first protrusion 51, has on the lower face of first shell 5
There are first through hole, the upside of the lower face of the second housing 6 that there is the second protrusion, have on the upper surface of the second housing 6
There are the second through-hole 61, first protrusion 51 to be telescopically assemblied in second through-hole 61, likewise, second protrusion
It is telescopically assemblied in the first through hole, the height of first protrusion 51 is more than the depth of second through-hole 61, institute
The height for stating the second protrusion is more than the depth of the first through hole, and first protrusion 51 is against institute across second through-hole 61
It states on top board, likewise, second protrusion is against across the first through hole on the lower platen；Wherein, described first
The rigidity of shell 5 and second housing 6 is more than the rigidity of the pressure-bearing straight-bar 1.
In the one side of the embodiment of the present invention, the Hookean spring 4 has two or more, and is held around described
Straightening bar 1 is evenly connected between the top board 2 and lower platen 3, and the Hookean spring is parallel to the pressure-bearing straight-bar, institute
It states Hookean spring 4 and is parallel to the pressure-bearing straight-bar 1.Pressure-bearing straight-bar and Hookean spring are collectively disposed at group between top board and lower platen
It at bearing structure, is installed on after bearing structure precommpression between the first shell and second housing, top board, lower platen, pressure-bearing are straight
Close, firm contact between bar, the first shell and second housing, wherein the rigidity of the first shell and second housing is straight much larger than pressure-bearing
Bar；Preferably, the rigidity of first shell 5 and second housing 6 is 20-40 times of the rigidity of the pressure-bearing straight-bar 1.
In the one side of the embodiment of the present invention, the installation site of the pressure-bearing straight-bar 1 and first shell 5 and second
The long overlapping of axles of shell 6.To ensure the vertical stress of pressure-bearing straight-bar.
It is fixed in the upside of the one side of the embodiment of the present invention, the upper surface of first shell 5 with structure is isolated
Connection, the downside of the lower face of the second housing 6 is fixedly connected with support construction；Or the upper surface of first shell 5
Upside be fixedly connected with support construction, the downside of the lower face of the second housing 6 is fixedly connected with structure is isolated.
In the one side of the embodiment of the present invention, first shell 5 is identical with the structure of second housing 6, is rectangular
Shape frame-like structure.Preferably, the pressure-bearing straight-bar 1, top board 2, lower platen 3, Hookean spring 4, outside the first shell 5 and second
The material of shell 6 is steel.To realize the optimization of apparatus of the present invention structure and mechanical property.
In the one side of the embodiment of the present invention, the pressure-bearing straight-bar 1 is eccentric structure compression bar, the compressive load being subject to
Gradually it is increased during, there is local buckling configuration and curved configuration successively in pressure-bearing straight-bar 1.
When in use, the axial direction of device is consistent with load action direction for apparatus of the present invention, if external tensile load acts on
The upper end of first shell, second housing are fixed, and the first shell is moved along draw direction, and top board displacement is by the upper of second housing
End constraint, pressure-bearing straight-bar bears compression at this time.If the first shell is moved along compression direction, second housing is fixed, and is connected to
The first protrusion on the downside of the upper surface of one shell passes through the second through-hole of the upper surface of second housing that load is acted on top board
On, the lower platen displacement positioned at pressure-bearing straight-bar lower end is constrained by second housing lower end, on the upside of the lower face of second housing
Second protrusion passes through the first through hole of the lower face of the first shell to resist the lower platen, and pressure-bearing straight-bar is still subject to press and answer at this time
Power.The rigidity of first shell and second housing is much larger than pressure-bearing straight-bar, the deformation of the first shell and second housing in above procedure
Ignore.It can be seen that no matter the first shell of device upper end bear tension and compression effect or second housing lower end bear tension and compression effect, hold
Straightening bar all bears compression, when load reaches the elastic buckling threshold value of pressure-bearing straight-bar, that is, regime shift occurs, by straight-bar configuration
Curved configuration is converted to, is local buckling configuration as being straight-bar configuration in Fig. 2 a, in Fig. 2 b, is curved configuration, unloading in Fig. 2 c
When straight-bar recoiled to by curved configuration.Pressure-bearing straight-bar becomes bending carrying from axis pressure carrying, and rigidity substantially reduces, when unloading then
It is sprung back from low-potential energy state, therefore there are phase difference, (such as Fig. 3 shows the load-displacement curves of pressure-bearing straight-bar between load-displacement
Figure, wherein load unit N, displacement unit m), i.e. generation lag dissipate, and external force acting is first changed into directly in the process for this
The elastic potential energy of bar, after regime shift, the reduction of curved bar rigidity makes its potential energy storage capacity be greatly reduced, and turns after original potential energy release
It is changed to kinetic energy, kinetic energy is then dissipated in a manner of Coulomb damping or acoustic energy, external under the collective effect that structure softening and hysteresis dissipate
High acceleration, which encourages, is isolated, and being isolated equipment acceleration will substantially reduce.The present invention is made of structure steel material, static
When there is high rigidity, when impact loading, elastic buckling occurs for pressure-bearing straight-bar, and multiple stabilities occur successively, produces
Raw negative stiffness, device overall stiffness decline therewith, the acceleration responsive for being isolated equipment or structure can be effectively reduced, to realize
Static high rigidity, the impact isolating function of dynamic Low rigidity.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (8)
1. a kind of multistable shock isolating apparatus, which is characterized in that including：
Pressure-bearing straight-bar, top board, lower platen, Hookean spring, the first shell and second housing；
For the pressure-bearing straight-bar clamping between the top board and lower platen, the Hookean spring tension is connected to the top board
Between lower platen, long overlapping of axles, the short axle of first shell and second housing, which are vertically intersected, to be combined together, and described
The upper surface of two shells is located at the downside of the upper surface of first shell, and the lower face of the second housing is located at described first
The downside of the lower face of shell, the top board are tightly attached to the downside of the upper surface of the second housing, and the lower platen is close to
Upside in the lower face of first shell；
The downside of the upper surface of first shell has the first protrusion, has first to lead on the lower face of first shell
The upside in hole, the lower face of the second housing has the second protrusion, has the second through-hole on the upper surface of the second housing,
First protrusion is telescopically assemblied in second through-hole, and it is logical that second protrusion is telescopically assemblied in described first
The height of Kong Zhong, first protrusion are more than the depth of second through-hole, and the height of second protrusion is more than described first
The depth of through-hole, first protrusion are against across second through-hole on the top board, and second protrusion passes through described
First through hole is against on the lower platen；
Wherein, the rigidity of first shell and second housing is more than the rigidity of the pressure-bearing straight-bar.
2. a kind of multistable shock isolating apparatus as described in claim 1, which is characterized in that the Hookean spring has two
Or two or more, and be evenly connected between the top board and lower platen around the pressure-bearing straight-bar, the Hookean spring
It is parallel to the pressure-bearing straight-bar.
3. a kind of multistable shock isolating apparatus as described in claim 1, which is characterized in that outside first shell and second
The rigidity of shell is 20-40 times of the rigidity of the pressure-bearing straight-bar.
4. a kind of multistable shock isolating apparatus as described in claim 1, which is characterized in that the installation position of the pressure-bearing straight-bar
Set the long overlapping of axles with first shell and second housing.
5. a kind of multistable shock isolating apparatus as described in claim 1, which is characterized in that
The upside of the upper surface of first shell is fixedly connected with structure is isolated, the downside of the lower face of the second housing
It is fixedly connected with support construction；Or the upside of the upper surface of first shell is fixedly connected with support construction, described second
The downside of the lower face of shell is fixedly connected with structure is isolated.
6. a kind of multistable shock isolating apparatus as described in claim 1, which is characterized in that outside first shell and second
The structure of shell is identical, is rectangular frame shape structure.
7. a kind of multistable shock isolating apparatus as described in claim 1, which is characterized in that the pressure-bearing straight-bar, top board,
Lower platen, Hookean spring, the first shell and second housing material be steel.
8. a kind of multistable shock isolating apparatus as described in any one of claim 1-7, which is characterized in that the pressure-bearing is straight
Bar be eccentric structure compression bar, the compressive load being subject to gradually it is increased during, there is local buckling structure successively in pressure-bearing straight-bar
Type and curved configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810020115.5A CN108317201B (en) | 2018-01-09 | 2018-01-09 | A kind of multistable shock isolating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810020115.5A CN108317201B (en) | 2018-01-09 | 2018-01-09 | A kind of multistable shock isolating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108317201A true CN108317201A (en) | 2018-07-24 |
| CN108317201B CN108317201B (en) | 2019-10-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810020115.5A Active CN108317201B (en) | 2018-01-09 | 2018-01-09 | A kind of multistable shock isolating apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN108317201B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083970A (en) * | 2018-09-12 | 2018-12-25 | 中国海洋大学 | A kind of multistable eccentric clamp formula axial direction isolation mounting |
| CN111043213A (en) * | 2019-12-10 | 2020-04-21 | 中国海洋大学 | Stable-state controllable laminated compression bar and transient vibration suppression structure based on same |
| CN111255841A (en) * | 2020-01-15 | 2020-06-09 | 中国海洋大学 | Three-layer laminating pressure lever and transient vibration suppression structure based on same |
| CN111810568A (en) * | 2020-07-29 | 2020-10-23 | 中国海洋大学 | Steady-state controllable composite pressure lever and transient vibration suppression structure based on same |
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| CN102678814A (en) * | 2012-05-10 | 2012-09-19 | 上海交通大学 | Euler compression bar rubber combined heavy-duty low-frequency vibration isolator |
| WO2015063397A1 (en) * | 2013-10-31 | 2015-05-07 | Airbus Defence And Space Sas | Vibration isolation module having reduced nonlinear effects |
| CN104819236A (en) * | 2015-05-04 | 2015-08-05 | 南车株洲电力机车有限公司 | Vibration isolator |
| CN106438805A (en) * | 2016-10-17 | 2017-02-22 | 安徽信泽科技有限公司 | Pull rod guide type complex spring damper |
-
2018
- 2018-01-09 CN CN201810020115.5A patent/CN108317201B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678814A (en) * | 2012-05-10 | 2012-09-19 | 上海交通大学 | Euler compression bar rubber combined heavy-duty low-frequency vibration isolator |
| WO2015063397A1 (en) * | 2013-10-31 | 2015-05-07 | Airbus Defence And Space Sas | Vibration isolation module having reduced nonlinear effects |
| CN104819236A (en) * | 2015-05-04 | 2015-08-05 | 南车株洲电力机车有限公司 | Vibration isolator |
| CN106438805A (en) * | 2016-10-17 | 2017-02-22 | 安徽信泽科技有限公司 | Pull rod guide type complex spring damper |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109083970A (en) * | 2018-09-12 | 2018-12-25 | 中国海洋大学 | A kind of multistable eccentric clamp formula axial direction isolation mounting |
| CN109083970B (en) * | 2018-09-12 | 2023-09-26 | 中国海洋大学 | Multistable eccentric pressing plate type axial vibration isolation device |
| CN111043213A (en) * | 2019-12-10 | 2020-04-21 | 中国海洋大学 | Stable-state controllable laminated compression bar and transient vibration suppression structure based on same |
| CN111255841A (en) * | 2020-01-15 | 2020-06-09 | 中国海洋大学 | Three-layer laminating pressure lever and transient vibration suppression structure based on same |
| CN111810568A (en) * | 2020-07-29 | 2020-10-23 | 中国海洋大学 | Steady-state controllable composite pressure lever and transient vibration suppression structure based on same |
| CN111810568B (en) * | 2020-07-29 | 2022-01-07 | 中国海洋大学 | Steady-state controllable composite pressure lever and transient vibration suppression structure based on same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108317201B (en) | 2019-10-18 |
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