CN105114524B - Improved method and device based on existing naval vessel vibrating isolation system - Google Patents
Improved method and device based on existing naval vessel vibrating isolation system Download PDFInfo
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- CN105114524B CN105114524B CN201510447173.2A CN201510447173A CN105114524B CN 105114524 B CN105114524 B CN 105114524B CN 201510447173 A CN201510447173 A CN 201510447173A CN 105114524 B CN105114524 B CN 105114524B
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Abstract
The invention provides a kind of improvement device based on existing naval vessel vibrating isolation system, including by device for vibration insutation frame and elastic base, being provided with some shock absorbers between device for vibration insutation frame and elastic base and being parallel with some independent Euler's buckling beams that are vertically arranged or laterally setting.Present invention also offers a kind of improved method based on existing naval vessel vibrating isolation system, the negative stiffness needed for Euler's buckling beam is determined according to the target frequency after the intrinsic frequency of existing vibrating isolation system and improvement, the installing space on rigidity formula, naval vessel in conjunction with Euler's buckling beam, to determine physical dimension parameter, the initial compression amount of Euler's buckling beam；The Euler's buckling beam selected is installed to by between device for vibration insutation frame and elastic base.The present invention reduces the intrinsic frequency of vibrating isolation system on the basis of original vibrating isolation system is not changed, and improves vibration isolating effect, reduction vibration transmission, improves Sound stealth.
Description
Technical field
The present invention relates to vibration absorber design field, more particularly to a kind of improvement based on existing naval vessel vibrating isolation system
Method and device.
Background technology
Naval vessel as naval's trump card weapon and movable strategic arms platform, carry defend national marine Homeland Security,
The task of maritime rights and interests is safeguarded and ensured, is also the highest priority that enemy takes precautions against and hit.Therefore, with preferable Sound stealth
There is important military significance for the probability that reduction naval vessel is found.During lowsteaming, the radiated noise of submarine is mainly it
Excitation produced by the operating of main auxiliary machine plant machinery is transferred to hull, causes what the backward radiation under water of hull vibration was caused.At present
The primary method of control that transmission is vibrated to power-equipment is to take passive vibration isolation measure, and this method is due to low cost, reliably
Property it is high and be widely used.But in theory, in order to ensure that system has enough stability and due to installing space on naval vessel
Limitation, the intrinsic frequency of the vibrating isolation system of system can not be too low, and otherwise quiet deformation is too big, and stability is not enough.At present generally
Vibrating isolation system intrinsic frequency for 12~15Hz or so.
If the intrinsic frequency of vibrating isolation system can be reduced under conditions of identical quiet deformation is kept, can further it increase
Vibration isolation region, realizes superlow frequency vibration isolating, and reduction vibration transmission improves Sound stealth effect.A kind of current trend is to utilize non-thread
Property vibration isolator the low dynamic stiffness stiffness characteristics of high Static stiffness realize big bearing capacity, less quiet deformation and relatively low intrinsic
Frequency, solves the problem of superlow frequency vibration isolating.
But existing nonlinear isolation device is generally the vibration isolator of positive negative stiffness one, volume is more huge, on ship
Wave, tilt and shock input under the conditions of response characteristic and stability it is still indefinite, the suitable dress on ship is poor.
The content of the invention
In order to solve these problems, the invention provides a kind of improvement device based on existing naval vessel vibrating isolation system, including
It is described that some shock absorbers, the quilt are provided between device for vibration insutation frame and elastic base by device for vibration insutation frame and pedestal
Some independent negative stiffness governor motions, the negative stiffness governor motion are also parallel between device for vibration insutation frame and elastic base
Using Euler's buckling beam that is vertically arranged or laterally setting.
It is preferred that being at least correspondingly arranged on an Euler's buckling beam beside each shock absorber.
It is preferred that being provided with the regulation spiral shell for adjusting Euler's buckling beam decrement on one end of the Euler's buckling beam
It is female.
It is preferred that the pedestal is elastic base.
It is preferred that the Euler's buckling beam is laterally set, one end of the Euler's buckling beam is pacified by frame connecting structure
The edge of the device for vibration insutation frame is attached to, the other end is installed on the elastic base by a pedestal attachment structure, institute
Stating pedestal attachment structure supports the other end of its Euler's buckling beam to be horizontally disposed with it.
It is preferred that the Euler's buckling beam is vertically arranged, one end of the Euler's buckling beam is pacified by frame connecting structure
On the bottom surface for being attached to the device for vibration insutation frame, the other end is vertically mounted on the elastic base by a pedestal attachment structure
On.
It is preferred that each Euler's buckling beam at least includes a piece of Euler column spring.
Existing naval vessel vibrating isolation system improved method is based on present invention also offers one kind, is filled using above-described improve
Put, comprise the following steps：
Step one, the intrinsic frequency for having vibrating isolation system is calculated, and according to the mesh after existing intrinsic frequency and improvement
Frequency is marked to determine total negative stiffness size needed for Euler's buckling beam；According to the quantity of the Euler's buckling beam of required setting, i.e.,
The negative stiffness size of each Euler's buckling beam can be obtained；
Include the Euler column spring more than a piece of or a piece of in step 2, each Euler's buckling beam, according to Euler column spring
Negative stiffness formula, obtains the negative stiffness size and physical dimension parameter, the relation of initial compression amount of Euler column spring；In conjunction with step
The installing space in negative stiffness size, naval vessel needed for the Euler's buckling beam obtained in one, to determine the piece number, several of Euler column spring
What dimensional parameters, initial compression amount；
Step 3, the Euler's buckling beam selected is installed to described by between device for vibration insutation frame and elastic base.
It is preferred that further comprising the steps：
Step 4, after the Euler's buckling beam is installed, up and down by device for vibration insutation frame described in push-and-pull, to ensure the Europe
Buckled beam is drawn not occur stuck；Ensure to be in compressive state under Euler's buckling beam original state simultaneously.
The present invention is allowed to compared with prior art, have the following advantages that and actively imitate due to using above technical scheme
Really：
A kind of improved method and device based on existing naval vessel vibrating isolation system that the present invention is provided, in original naval vessel vibration isolation system
On system, directly by some Euler's buckling beams as negative stiffness governor motion in parallel between device for vibration insutation frame and elastic base；
Realized on the basis of original vibrating isolation system is not changed and the support stiffness of vibrating isolation system is adjusted, ensured at equalization point
On the premise of static displacement and stability, the intrinsic frequency of vibrating isolation system is reduced, vibration isolating effect, reduction vibration transmission is improved, carries
Loud stealth；And the present invention there is compact conformation, it is simple to operate.
Brief description of the drawings
With reference to accompanying drawing, by detailed description below, the above-mentioned and other feature of the present invention can be more clearly understood that and excellent
Point, wherein：
Fig. 1 is the structural representation of the embodiment of the present invention one；
Fig. 2 is the A-A direction views in Fig. 1；
Fig. 3 is the scheme of installation of Euler's buckled beam in the embodiment of the present invention one；
Fig. 4 is the installation schematic diagram of Euler's buckled beam in the embodiment of the present invention one；
Fig. 5 is the structural representation of the embodiment of the present invention two；
Fig. 6 is the scheme of installation of Euler's buckled beam in the embodiment of the present invention two.
Symbol description：
1- is by device for vibration insutation
2- is by device for vibration insutation frame
3- Euler's buckling beams
4- shock absorbers
5- pedestals
3a- frame connecting structures
3b- Eulers bend depression bar
3c- adjusting nuts
3d- pedestal attachment structures
Embodiment
Referring to the accompanying drawing for showing the embodiment of the present invention, the present invention is described in more detail.However, the present invention can be with
Many multi-forms are realized, and should not be construed as being limited by the embodiment herein proposed.On the contrary, proposing that these embodiments are
In order to reach abundant and complete disclosure, and those skilled in the art are made to understand the scope of the present invention completely.These are attached
In figure, for clarity, the size and relative size in layer and region may be exaggerated.
Embodiment one
Reference picture 1-3, is in original warship the invention provides a kind of improvement device based on existing naval vessel vibrating isolation system
It is improved on the basis of ship vibrating isolation system, plays the intrinsic frequency of reduction vibrating isolation system, improves vibration isolating effect, reduction vibration biography
Pass, improve the effect of Sound stealth.Vibrating isolation system system includes by device for vibration insutation frame 2 and pedestal, and wherein pedestal uses bullet
Property pedestal 5, is provided with by device for vibration insutation 1 in device for vibration insutation frame 2, is also set between device for vibration insutation frame 2 and elastic base 5
It is equipped with some shock absorbers 4.Wherein, the specific constructive form of shock absorber 4 can be selected as the case may be, be not restricted herein；
The distribution form of shock absorber 4 can be according to by the Mass Distribution of device for vibration insutation 1, the arrangement number of the big local shock absorber 4 of Mass Distribution
Mesh multiple spot, when non-uniform mass, the distribution form of the preferred use symmetrical expression of shock absorber 4, the distribution of shock absorber 4
Form and setting number are not restricted herein.
In the present embodiment, the negative firm of some laterally settings is being parallel between device for vibration insutation frame 2 and elastic base 5
Spend governor motion.Specifically, the use Euler's buckling beam 3 of negative stiffness governor motion preferably, wherein it is preferred that each shock absorber 4
An Euler's buckling beam 3 is at least nearby correspondingly arranged on, the setting number of certain Euler's buckling beam 3 can equally be set according to by vibration isolation
Standby 1 quality and distribution are determined, are not restricted herein.
Euler's buckling beam 3 can be made up of the Euler column spring 3b more than a piece of or a piece of, and particular sheet number comes as the case may be
Selection, is not restricted herein；One end of Euler's buckling beam 3 is installed to by device for vibration insutation frame 2 by frame connecting structure 3a
On edge, specific frame installing mechanism 3a is fixedly installed to by the edge of device for vibration insutation frame 2, Euler's buckling beam 3 and machine
Frame installing structure 3a connections, and realize fixation.The other end of Euler's buckling beam 3 is installed to elastic base by pedestal attachment structure 3d
Seat 5 on, specific pedestal attachment structure 3d is vertically fixedly mounted on the upper surface of elastic base 5, Euler's buckling beam 3 it is another
End is inserted and is connected with pedestal attachment structure 3d, and the other end that pedestal attachment structure 3d is used to support Euler's buckling beam sets its level
Put.
In the present embodiment, adjusting nut 3c is additionally provided with the connection pedestal attachment structure of Euler's buckling beam 3 3d one end,
It by rotating adjusting nut 3c can be used to that the decrement of Euler's buckling beam 3 is adjusted.The tune of the decrement of Euler's buckling beam 3
Save principle as follows：Be adjusted using the screw thread shown in adjusting nut 3c, Euler column spring be compressed, due to Euler column spring with
The connection end of pedestal attachment structure is fixed, therefore Euler's buckling beam 3 can occur difference and measure compression, and it is radially expanded degree
Change, can so obtain different negative stiffnesses.
The present invention is by by some Euler's buckling beams 3 in parallel between device for vibration insutation frame 2 and elastic base 5, ensureing
Under the premise of static displacement and stability identical of the vibrating isolation system at equalization point, consolidating for whole vibrating isolation system is effectively reduced
There is frequency, so as to further increase vibration isolation region, realize ultralow vibration isolation, reduce vibration transmission, so as to be conducive to improving
The effect of Sound stealth；Meanwhile, Euler's buckling beam 3 is independent mechanism, and existing vibration isolation can be to be mounted directly to by mounting structure
In system, the structure without changing existing vibrating isolation system, the present invention is simple and compact for structure, easy for installation, advantageously reduces cost.
Certainly, the vibrating isolation system that the present invention is provided is not only applicable to the improvement of existing naval vessel vibrating isolation system, is equally applicable to other and sets
Standby improvement, also can make, use directly as a kind of new vibrating isolation system.In addition, by Euler's buckling in the present embodiment
When beam is horizontally disposed with, because Euler's buckling beam adds constraint in the horizontal, horizontal intrinsic frequency can be changed, its negative stiffness
Regulating power is big.
In the present embodiment, existing naval vessel vibrating isolation system improved method, specific bag are based on present invention also offers one kind
Include following steps：
1st, the intrinsic frequency for having vibrating isolation system is calculated, and according to the target frequency after existing intrinsic frequency and improvement
To determine the negative stiffness size needed for Euler's buckling beam 3；
Specifically, if the vertical intrinsic frequency of known vibrating isolation system is f0Hz, is m by the quality of device for vibration insutation and frame,
The vertical intrinsic frequency of target for needing the vibrating isolation system after improving is f1Hz, then total negative stiffness size needed for can calculating is kAlways
=m [(2 π f0)2-(2πf1)2]；The setting number N of the Euler's buckling beam determined further according to installing space size on naval vessel, is obtained
Obtain the negative stiffness k=k of every Euler's buckling beamAlways/N。
2. during for Euler's buckling beam lateral arrangement, the Europe more than a piece of or a piece of is included in each Euler's buckling beam 3
Strut and tie, according to the negative stiffness formula of Euler column spring, obtains the negative stiffness size and physical dimension parameter, initial pressure of Euler column spring
The relation of contracting amount；In conjunction with the negative stiffness size needed for the Euler's buckling beam 3 obtained in step one, the installing space on naval vessel,
To determine the piece number of Euler column spring, physical dimension parameter, initial compression amount；
Specifically, n Euler column spring is provided with each Euler's buckling beam, therefore the negative stiffness k of each Euler column spring0=
k/n；A width of b of the square-section of Euler column spring, thickness is h, and the length of Euler column spring is L, and the rigidity formula of Euler column spring is：
In formula,
Wherein, E is modulus of elasticity, and I is cross sectional moment of inertia, and
According to the negative stiffness size k of each Euler column spring of above-mentioned calculation0=k/n, and it is above-mentioned according to k0Expression formula, you can
Provide k needed for satisfaction0Physical dimension parameter (b, h, L, q0) and installation dimension (a, θ).
3rd, the Euler's buckling beam 3 determined in step 2 is installed to by between device for vibration insutation frame 2 and elastic base 5；
Specifically, in the case of idle on naval vessel, frame connecting structure is installed being reached the standard grade by device for vibration insutation frame 2
The horizontal two ends of Euler's buckling beam 3, while installing pedestal attachment structure 3d on elastic base 5, are then respectively embedded into by 3a
Between frame connecting structure 3a and pedestal attachment structure 3d, it is to be installed it is good after, the attaching nut for locking various pieces.
4th, after Euler's buckling beam 3 is installed, push-and-pull is by device for vibration insutation frame 2, to ensure that Euler's buckling beam will not block
Extremely；Ensure to be in compressive state under Euler's buckling beam original state simultaneously.
Specifically, push-and-pull frame up and down simultaneously, it is ensured that Euler's buckling beam 3 will not occur it is stuck, while near equalization point,
Euler's buckling beam is in compressive state in the horizontal level as shown in Fig. 1,3；Then Euler is bent by adjusting nut 3c
The decrement of curved beam negative stiffness governor motion is adjusted.
After the present invention is installed according to above-mentioned steps, under static operating mode, negative stiffness governor motion-Euler's buckling beam 3 exists
Balance point position is in level, does not provide vertical stiffness, thus do not interfere with the point Static stiffness and it is static when decrement；When
Equipment is under dynamic exciting during up-down vibration, and now up-down vibration occurs therewith for negative stiffness governor motion-Euler's buckling beam 3, hair
It is raw to tilt, negative stiffness can be provided, negative stiffness is added in the rigidity of existing vibrating isolation system, realizes subtracting for vibrating isolation system rigidity
It is small.
Embodiment two
Reference picture 4-5, the present embodiment is the conversion embodiment on the basis of embodiment one, and negative stiffness is adjusted in the present embodiment
Save mechanism and use vertically arranged Euler's buckling beam, the structure of remainder can refer to the associated description of embodiment one, herein
It is not restricted.
In the present embodiment, one end of Euler's buckling beam 3 is installed to by device for vibration insutation frame 2 by frame connecting structure 3a
Bottom surface, specific frame installing mechanism 3a is fixedly installed to by the bottom surface of device for vibration insutation frame 2, Euler's buckling beam 3 and machine
Frame installing structure 3a connections；The other end of Euler's buckling beam is installed on the upper surface of elastic base 5 by pedestal attachment structure 3d,
Specific pedestal attachment structure 3d is fixedly mounted on the upper surface of elastic base 5, and the other end and the pedestal of Euler's buckling beam 3 connect
Binding structure 3d is connected and is realized fixation.In the present embodiment, also set on the connection frame installing mechanism 3a of Euler's buckling beam 3 one end
Adjusting nut 3c is equipped with, by rotating adjusting nut 3c can be used to that the decrement of Euler's buckling beam 3 is adjusted.Euler's buckling
The Principles of Regulation of the decrement of beam 3 can refer to the description in embodiment one, and here is omitted.
The present invention by some Euler's buckling beam negative stiffnesses in parallel between device for vibration insutation frame 2 and elastic base 5 by adjusting
Mechanism is saved, under the premise of static displacement and stability identical of the vibrating isolation system at equalization point is ensured, is effectively reduced whole
The intrinsic frequency of individual vibrating isolation system, so as to further increase vibration isolation region, realizes ultralow vibration isolation, reduces vibration transmission,
So as to be conducive to the effect for improving Sound stealth；In addition, during the setting of Euler's buckling beam numerical value, in order to reach vibrating isolation system negative stiffness work
Make region, it is necessary to precommpression is carried out to it, therefore the present invention can improve vibrating isolation system using the Euler column spring being vertically arranged
Bearing capacity, after negative stiffness is reached, the also unstability in the horizontal direction of Euler's buckling beam 3 will not change horizontal intrinsic frequency
Rate.
In the present embodiment, existing naval vessel vibrating isolation system improved method, specific bag are based on present invention also offers one kind
Include following steps：
1st, the intrinsic frequency for having vibrating isolation system is calculated, and according to the target frequency after existing intrinsic frequency and improvement
To determine the negative stiffness size needed for Euler's buckling beam 3；
Specifically, if the vertical intrinsic frequency of known vibrating isolation system is f0Hz, is m by the quality of device for vibration insutation and frame,
The vertical intrinsic frequency of target for needing the vibrating isolation system after improving is f1Hz, then total negative stiffness size needed for can calculating is kAlways
=m [(2 π f0)2-(2πf1)2]；The setting number N of the Euler's buckling beam determined further according to installing space size on naval vessel, is obtained
Obtain the negative stiffness k=k of every Euler's buckling beamAlways/N。
2. include the Euler column spring more than a piece of or a piece of in each Euler's buckling beam 3, according to the rigidity of Euler column spring
Formula, obtains the negative stiffness size and physical dimension parameter, the relation of initial compression amount of Euler column spring；Obtained in conjunction with step one
Negative stiffness size needed for the Euler's buckling beam 3 obtained, the installing space on naval vessel, to determine piece number, the dimensioning of Euler column spring
Very little parameter, initial compression amount；
Specifically, n Euler column spring is provided with each Euler's buckling beam, therefore the negative stiffness k of each Euler column spring0=
k/n；A width of b of the square-section of Euler column spring, thickness is h, and the length of Euler column spring is L,
When being vertically arranged for Euler's buckling beam, the power of each Euler column spring and the relation of displacement are：
(in formula,It is the critical load of unstability, E is modulus of elasticity, and I is cross sectional moment of inertia,U is
Displacement under this masterpiece use)
Rigidity diminishes after unstability, and the approximate formula of its Rigidity Calculation isP-PeRepresent after unstability
Power), in fact, because Euler column spring has initial imperfection, negative stiffness occurs in it after flexing, and the size of negative stiffness is assumed
For k0(k0Size and actual defect have relation, it is necessary to be obtained by test), if having obtained k0, then specific calculation procedure can
Calculate, do not make herein with reference to the piece number of Euler column spring, physical dimension parameter, the computational methods of initial compression amount in embodiment 1
Limitation.
3rd, the Euler's buckling beam 3 determined in step 2 is installed to by between device for vibration insutation frame 2 and elastic base 5；
Specifically, in the case of idle on naval vessel, frame connecting structure is installed being reached the standard grade by device for vibration insutation frame 2
3a, while installing pedestal attachment structure 3d on elastic base 5, then distinguishes the two ends of Euler's buckling beam 3 vertically prevented
Between embedded frame connecting structure 3a and pedestal attachment structure 3d, it is to be installed it is good after, the attaching nut for locking various pieces.
4th, after Euler's buckling beam is installed, push-and-pull is by device for vibration insutation frame 2, to ensure that Euler's buckling beam 3 will not block
Extremely；Ensure to be in compressive state under the original state of Euler's buckling beam 3 simultaneously.
Specifically, simultaneously up and down push-and-pull frame, it is ensured that Euler's buckling beam negative stiffness governor motion will not occur it is stuck, simultaneously
Near equalization point, Euler's buckling beam is in compressive state in vertical position as shown in figs. 4-5.Then regulation is passed through
The decrement of Euler's buckling beam negative stiffness governor motion is adjusted nut 3c.
After the present invention is installed according to above-mentioned steps, under static operating mode, vertical Euler's buckling beam is in balance point position
In vertical state, and in i.e. by the operating point of unstability, it can provide the vertical stiffness under static state, therefore can increase the point
Static stiffness, decrement when reducing static improves the stability of system；When equipment up-down vibration under dynamic exciting, this
Unstability occurs for Shi Shuzhi Euler's buckling beam 3 in the presence of dynamic loading (dynamic loading is typically 1.5~1.7 times of dead load),
Euler's lateral deflection curved beam 3 after unstability can provide negative stiffness, and negative stiffness is added in the rigidity of existing vibrating isolation system, realizes vibration isolation
The reduction of system stiffness.
Those skilled in the art should be understood that the present invention can be implemented without departing from this with many other concrete forms
The spirit or scope of invention.Although having been described for embodiments of the invention, it should be understood that the present invention should not be limited to these embodiments,
Change is made within the spirit and scope of the invention that those skilled in the art can define such as appended claims and is repaiied
Change.
Claims (8)
1. a kind of improvement device based on existing naval vessel vibrating isolation system, it is characterised in that including by device for vibration insutation frame and pedestal,
It is described to be provided with some shock absorbers between device for vibration insutation frame and elastic base, it is described by device for vibration insutation frame and elastic base
Between be also parallel with some independent negative stiffness governor motions, the negative stiffness governor motion is using vertically arranged or laterally set
Euler's buckling beam；The adjusting nut for adjusting Euler's buckling beam decrement is provided with one end of the Euler's buckling beam.
2. the improvement device according to claim 1 based on existing naval vessel vibrating isolation system, it is characterised in that subtract described in each
Shake and be at least correspondingly arranged on an Euler's buckling beam beside device.
3. the improvement device according to claim 1 based on existing naval vessel vibrating isolation system, it is characterised in that the pedestal is
Elastic base.
4. the improvement device according to claim 1 based on existing naval vessel vibrating isolation system, it is characterised in that the Euler bends
Curved beam is laterally set, and one end of the Euler's buckling beam is installed to the edge of the device for vibration insutation frame by frame connecting structure
Place, the other end is installed on the elastic base by a pedestal attachment structure, and the pedestal attachment structure supports its Europe
Drawing the other end of buckled beam is horizontally disposed with it.
5. the improvement device according to claim 1 based on existing naval vessel vibrating isolation system, it is characterised in that the Euler bends
Curved beam is vertically arranged, and one end of the Euler's buckling beam is installed to the bottom surface of the device for vibration insutation frame by frame connecting structure
On, the other end is vertically mounted on the elastic base by a pedestal attachment structure.
6. the improvement device according to claim 1 based on existing naval vessel vibrating isolation system, it is characterised in that each Europe
Buckled beam is drawn at least to include a piece of Euler column spring.
7. a kind of improved method based on existing naval vessel vibrating isolation system, it is characterised in that using any in the claims 1-6
Improvement device described in one, comprises the following steps：
Step one, the intrinsic frequency for having vibrating isolation system is calculated, and according to the target frequency after existing intrinsic frequency and improvement
Rate determines total negative stiffness size needed for Euler's buckling beam；According to the quantity of the Euler's buckling beam of required setting, you can obtain
Obtain the negative stiffness size of each Euler's buckling beam；
Include the Euler column spring more than a piece of or a piece of in step 2, each Euler's buckling beam, according to the negative firm of Euler column spring
Formula is spent, the negative stiffness size and physical dimension parameter, the relation of initial compression amount of Euler column spring is obtained；In conjunction with step one
The installing space in negative stiffness size, naval vessel needed for the Euler's buckling beam of acquisition, to determine piece number, the dimensioning of Euler column spring
Very little parameter, initial compression amount；
Step 3, the Euler's buckling beam selected is installed to described by between device for vibration insutation frame and elastic base.
8. the improved method according to claim 7 based on existing naval vessel vibrating isolation system, it is characterised in that further comprise
Following steps：
Step 4, after the Euler's buckling beam is installed, up and down by device for vibration insutation frame described in push-and-pull, to ensure that the Euler bends
Curved beam will not occur stuck；Ensure to be in compressive state under Euler's buckling beam original state simultaneously.
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| WO2018132101A1 (en) * | 2017-01-12 | 2018-07-19 | Hrl Laboratories, Llc | Adjustable negative stiffiness mechanisms |
| CN107135749B (en) * | 2017-04-26 | 2019-06-28 | 江苏大学 | It is a kind of control the low-frequency vibration of longitudinally axial flow threshing roller quasi- zero stiffness answer girder construction |
| SE542637C2 (en) * | 2018-09-04 | 2020-06-23 | Saab Ab | Sensor fastener arrangement |
| CN113565922B (en) * | 2021-08-23 | 2022-06-10 | 北京理工大学 | Integrated quasi-zero stiffness vibration isolation buffering element and vibration isolation buffering assembly |
| CN114934966B (en) * | 2022-04-24 | 2023-03-10 | 上海交通大学 | Base structure with unsteady negative-stiffness vibration absorber |
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| 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 |
| CN204248997U (en) * | 2014-11-03 | 2015-04-08 | 陕西飞机工业（集团）有限公司 | A kind of Poly Foam foam-plastic hot cutting tool |
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| CA2728821C (en) * | 2010-01-19 | 2018-09-25 | Albert S. Richardson Jr. | Spacer device |
| CN204110312U (en) * | 2014-07-03 | 2015-01-21 | 江苏海事职业技术学院 | The naval vessel pedestal of anti-high-strength impact |
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| 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 |
| CN204248997U (en) * | 2014-11-03 | 2015-04-08 | 陕西飞机工业（集团）有限公司 | A kind of Poly Foam foam-plastic hot cutting tool |
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