CN109058368A - Non-linear rigidity damps multi-degree-of-freedom vibration isolation system - Google Patents
Non-linear rigidity damps multi-degree-of-freedom vibration isolation system Download PDFInfo
- Publication number
- CN109058368A CN109058368A CN201811024589.3A CN201811024589A CN109058368A CN 109058368 A CN109058368 A CN 109058368A CN 201811024589 A CN201811024589 A CN 201811024589A CN 109058368 A CN109058368 A CN 109058368A
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- China
- Prior art keywords
- support bar
- attachment base
- expansion link
- link mechanism
- vibration isolation
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Classifications
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
Abstract
The invention discloses a kind of non-linear rigidities to damp multi-degree-of-freedom vibration isolation system comprising the first attachment base and the second attachment base；The X expansion link mechanism being set between the first attachment base and the second attachment base, X expansion link mechanism include at least one X-type bar, and X-type bar includes first support bar and second support bar that be arranged in a crossed manner and being hinged；Damped part, one end of damped part and the first attachment base or the second attachment base are relatively fixed；Elastomeric element, stretching or the elasticity of compression component when X expansion link mechanism is flexible.The horizontal displacement of non-linear rigidity damping multi-degree-of-freedom vibration isolation system and vertical displacement have a kind of nonlinear geometrical relationship, effective non-linear rigidity and damping can be provided, X expansion link mechanism and damped part enable whole device anti-torsion and load-bearing, elastomeric element is set simultaneously to realize that the vibration isolating effect for being directed to different load-carryings adjustment vertical direction, damped part can realize effective vibration isolation of horizontal plane both direction.
Description
Technical field
The present invention relates to device for vibration insutation technical fields, damp multiple degrees of freedom more specifically to a kind of non-linear rigidity
Vibrating isolation system.
Background technique
Main two fundamental factors are rigidity and damping in vibrating isolation system.Different rigidity and damping can be to vibration isolation
System causes the change of essence.Good vibrating isolation system can provide effective vibration protection in a wide range.Vibration isolation
System can not only be applied to the civil fields such as the suspension system of automotive seat, can also apply in aerospaces such as aviation, ships
Military field.Vibrating isolation system can be divided into linear vibrating isolation system and two kinds of Nonlinear Vibration Isolation System from the point of view of mathematical modeling analysis
Type.
With the raising of technical requirements, vibration isolation technique is widely used in field of engineering technology to realize vibration control, vibrates
Protection etc..For the vibration isolation demand of some high requests, the design that the rigidity and damping needs of vibrating isolation system optimize comprehensively considers and
Realize vibration protection.In parameter designing, reducing vibrating isolation system rigidity can make vibration isolation frequency band broaden, but to leading to system bearing energy
Power decline；Damped coefficient increases meeting so that the vibration amplitude of formant reduces, but can deteriorate the vibration isolation capability of high frequency, therefore existing
The vibration isolating effect of vibrating isolation system in technology is poor.
It is that current those skilled in the art are badly in need of solution in conclusion how to effectively improve the vibration isolating effect of vibrating isolation system
Certainly the problem of.
Summary of the invention
In view of this, the first purpose of this invention is to provide a kind of non-linear rigidity damping multi-degree-of-freedom vibration isolation system
The structure design of system, non-linear rigidity damping multi-degree-of-freedom vibration isolation system can effectively improve the vibration isolation effect of vibrating isolation system
Fruit.
In order to achieve the above object, the invention provides the following technical scheme:
A kind of non-linear rigidity damping multi-degree-of-freedom vibration isolation system, comprising:
First attachment base and the second attachment base；
The X expansion link mechanism being set between first attachment base and the second attachment base, the X expansion link mechanism include
At least one X-type bar, X-type bar include first support bar and second support bar that be arranged in a crossed manner and being hinged, each X-type
The first support bar and second support bar of bar are relatively rotated to realize the flexible of the X expansion link mechanism；
Damped part, one end of the damped part and first attachment base or the second attachment base are relatively fixed；
Elastomeric element stretches or compresses the elastomeric element when X expansion link mechanism is flexible.
Preferably, in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system, the X of the head end of the X expansion link mechanism
Type bar is connect with first attachment base, the first support bar of the X-type bar of the head end of the X expansion link mechanism and/or second
Strut can be mobile relative to first attachment base；
The X-type bar of the end of the X expansion link mechanism is connect with second attachment base, the end of the X expansion link mechanism
The first support bar and/or second support bar of the X-type bar at end can be mobile relative to second attachment base.
Preferably, in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system, first attachment base and the second connection
It is provided with sliding slot or sliding rail on seat, when the X expansion link mechanism stretches, the of the X-type bar of the head end of the X expansion link mechanism
One support rod and/or second support bar are slided along the sliding slot or sliding rail of first attachment base, the end of the X expansion link mechanism
The first support bar and/or second support bar of the X-type bar at end are slided along the sliding slot or sliding rail of second attachment base.
Preferably, in above-mentioned non-linear rigidity damping isolation system, the first support bar of each X-type bar and second
Pass through bearing hinge connection between strut；
Lead between the first support bar of X-type bar and the second support bar of another X-type bar in two adjacent X-type bars
It crosses bearing hinge connection, passes through bearing hinge connection between the second support bar of X-type bar and the first support bar of another X-type bar.
Preferably, in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system, the quantity of the X expansion link mechanism is more
It is a, and the telescopic direction of multiple X expansion link mechanisms is parallel to each other；
Non-linear rigidity damping multi-degree-of-freedom vibration isolation system further includes the connecting rod for connecting two X expansion link mechanisms, described
One end of connecting rod is connect with one of expansion link mechanism and the other end is connect with another expansion link mechanism, and the connecting rod is parallel
Articulated shaft setting between first support bar and second support bar.
Preferably, in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system, the connecting rod is two adjacent X-type bars
Articulated shaft.
Preferably, in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system, the first end of the elastomeric element and one
A connecting rod is fixedly connected.
It preferably, further include for adjusting the elastic portion in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system
The regulating device of the deformation of part.
Preferably, in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system, the regulating device includes being set to the
A connecting seat or baffle, the nut being fixed on the baffle and the screw cooperated with the nut on the second attachment base, institute
The second end for stating elastomeric element is fixedly connected with the screw, rotates the screw to drive the second end of the elastomeric element to lean on
Close or remote from its first end.
Preferably, in above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system, the telescopic direction of the elastomeric element with
Articulated shaft between first support bar and second support bar is mutually perpendicular to.
Non-linear rigidity damping multi-degree-of-freedom vibration isolation system provided by the invention includes the first attachment base, the second attachment base, X
Expansion link mechanism, damped part and elastomeric element.Wherein, X expansion link mechanism be set to the first attachment base and the second attachment base it
Between, i.e., one end of X expansion link mechanism is connect with the first attachment base and the other end is connect with the second attachment base.X expansion link mechanism is stretched
It is located remotely from each other between first attachment base and the second attachment base when long, the first attachment base and the second connection when X expansion link mechanism is shunk
It is close to each other between seat.
X expansion link mechanism includes at least one X-type bar, i.e., each X expansion link mechanism includes arranging along its telescopic direction
At least one X-type bar.When X expansion link mechanism includes multiple X-type bars, multiple X-type bars along telescope support telescopic direction
It successively arranges and connects.X-type bar includes first support bar and second support bar that be arranged in a crossed manner and being hinged, i.e., in X-type bar
First support bar and second support bar is arranged in a crossed manner and the crossover location of first support bar and second support bar is hinged, with reality
Existing first support bar and second support bar are relatively rotatable to each other.When X expansion link mechanism includes multiple X-type bars, two adjacent X
The first support bar of one of them in type bar and another second support bar are hinged, the second support bar of one of them with it is another
A first support bar is hinged, to realize being sequentially connected for multiple X-type bars.The first support bar of each X-type bar and the second support
Bar is relatively rotated to realize the flexible of the X expansion link mechanism.One end of damped part and the first attachment base or the second attachment base phase
To fixation.Stretching or the elasticity of compression component when X expansion link mechanism is flexible.
When damping multi-degree-of-freedom vibration isolation system using non-linear rigidity provided by the invention, if the first attachment base and damper portion
One end of part connects, then connect the other end of damped part with vibration isolation object, the second attachment base is connect with vibration source；Or
The other end of damped part is connect with vibration source, the second attachment base is connect with vibration isolation object.The damping of this non-linear rigidity is more
Freedom degree vibrating isolation system is obstructed vibration source and vibration isolation object by damped part and X expansion link mechanism, phase on X expansion link mechanism
There is gap, and the flexible component that stretches of X expansion link mechanism is buffered between two adjacent X-type bars, damped part can be real
Effective vibration isolation of existing multiple freedom degrees, substantially increases vibration isolating effect.
In addition, the horizontal displacement of non-linear rigidity damping multi-degree-of-freedom vibration isolation system and vertical displacement have one kind non-linear
Geometrical relationship, so as to provide effective non-linear rigidity and damping, X expansion link mechanism and damped part entirely to fill
Set can anti-torsion and load-bearing, while elastomeric element is set to realize that the vibration isolating effect of vertical direction, damped part can be realized
Effective vibration isolation of horizontal plane both direction.
X expansion link mechanism is based on a kind of bionical leg structure, is generated under movement or Static behavior using the mechanism non-
Linear rigidity and damping compensate for lacking for existing vibration insulation structure to realize a kind of vibration isolating effect effective, frequency range is wide
It falls into, such as effective isolation frequency narrow range, static(al) bearing capacity difference etc..Meanwhile it can be in conjunction with X expansion link mechanism and damped part
It realizes multivariant vibration isolation, and can bear compared with big load.Generally speaking, non-linear rigidity provided by the invention damps mostly certainly
There is wide multi-degree-of-freedom vibration isolation, isolation frequency range, small in size, carrying weight, without the spies such as energy consumption, stability is good by degree vibrating isolation system
Point, it is applied widely.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram that non-linear rigidity provided in an embodiment of the present invention damps multi-degree-of-freedom vibration isolation system；
Fig. 2 is the side view that non-linear rigidity provided in an embodiment of the present invention damps multi-degree-of-freedom vibration isolation system；
Fig. 3 is the rearview that non-linear rigidity provided in an embodiment of the present invention damps multi-degree-of-freedom vibration isolation system；
Fig. 4 is the static rigidity and system that non-linear rigidity provided in an embodiment of the present invention damps multi-degree-of-freedom vibration isolation system
Relationship between each parameter value.
In fig. 1-3:
The first attachment base of 1-, 2- damped part, 3- groove, 4- connecting rod, 5- screw, 6- baffle, 7- nut, 8- elastic portion
Part, the second attachment base of 9-, 10-X expansion link mechanism, 101-X type bar, 10a- first support bar, 10b- second support bar, 11- are sliding
Slot, 12- bearing.
Specific embodiment
The first purpose of this invention is to provide a kind of non-linear rigidity damping multi-degree-of-freedom vibration isolation system, this is non-linear
The structure design of stiffness and damping multi-degree-of-freedom vibration isolation system can effectively improve the vibration isolating effect of vibrating isolation system.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", " left side " and " right side " etc. refer to
The orientation or positional relationship shown is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplifies
Description, rather than the position of indication or suggestion meaning or element must have particular orientation, be constituted and operated with specific orientation,
Therefore it should not be understood as limitation of the invention.In addition, term " first ", " second " are used for description purposes only, and should not be understood as
Indication or suggestion relative importance.
Fig. 1-Fig. 3 is please referred to, non-linear rigidity damping multi-degree-of-freedom vibration isolation system provided by the invention includes the first connection
The 1, second attachment base 9 of seat, X expansion link mechanism 10, damped part 2 and elastomeric element 8.Wherein, X expansion link mechanism 10 is set to
Between a connecting seat 1 and the second attachment base 9, i.e. one end of X expansion link mechanism 10 is connect and the other end and with the first attachment base 1
The connection of two attachment bases 9.It is located remotely from each other between the first attachment base 1 and the second attachment base 9 when X expansion link mechanism 10 extends, X telescopic rod
It is close to each other between the first attachment base 1 and the second attachment base 9 when mechanism 10 is shunk.
X expansion link mechanism 10 includes at least one X-type bar 101, i.e., each X expansion link mechanism 10 includes along its flexible side
To at least one X-type bar 101 of arrangement.When X expansion link mechanism 10 includes multiple X-type bars 101, multiple X-type bars 101 are along stretching
The telescopic direction of contracting bracket is successively arranged and is connected.X-type bar 101 includes first support bar 10a that is arranged in a crossed manner and being hinged
With second support bar 10b, i.e., first support bar 10a and second support bar 10b is arranged in a crossed manner in X-type bar 101 and first support bar
The crossover location of 10a and second support bar 10b are hinged, to realize that first support bar 10a and second support bar 10b being capable of phases
To rotation.When X expansion link mechanism 10 includes multiple X-type bars 101, first of one of them in two adjacent X-type bars 101
Strut 10a and another second support bar 10b is hinged, the second support bar 10b of one of them and another the first support
Bar 10a is hinged, to realize being sequentially connected for multiple X-type bars 101.The support of the first support bar 10a of each X-type bar 101 and second
Bar 10b is relatively rotated to realize the flexible of the X expansion link mechanism 10.
One end of damped part 2 and the first attachment base 1 or the second attachment base 9 are relatively fixed.When X expansion link mechanism 10 stretches
Stretching or elasticity of compression component 8.
When damping multi-degree-of-freedom vibration isolation system using non-linear rigidity provided by the invention, if the first attachment base 1 and damping
One end of component 2 connects, then connect the other end of damped part 2 with vibration isolation object, and the second attachment base 9 is connected with vibration source
It connects；Or connect the other end of damped part 2 with vibration source, the second attachment base 9 is connect with vibration isolation object.This is non-linear just
Degree damping multi-degree-of-freedom vibration isolation system is obstructed vibration source and vibration isolation object by damped part 2 and X expansion link mechanism 10, and X stretches
On rod reducing machine structure 10 between two adjacent X-type bars 101 have gap, and X expansion link mechanism 10 stretch flexible component 8 into
Row buffering, damped part 2 can realize effective vibration isolation of multiple freedom degrees, substantially increase vibration isolating effect.
In addition, the horizontal displacement of non-linear rigidity damping multi-degree-of-freedom vibration isolation system and vertical displacement have one kind non-linear
Geometrical relationship, so as to provide effective non-linear rigidity and damping, X expansion link mechanism 10 and damped part 2 make whole
A device can anti-torsion and load-bearing, while elastomeric element 8 is set to realize the vibration isolating effect of vertical direction, damped part 2
Effective vibration isolation of horizontal plane both direction can be achieved.
X expansion link mechanism 10 is based on a kind of bionical leg structure, is generated under movement or Static behavior using the mechanism
Non-linear rigidity and damping compensate for lacking for existing vibration insulation structure to realize a kind of vibration isolating effect effective, frequency range is wide
It falls into, such as effective isolation frequency narrow range, static(al) bearing capacity difference etc..Meanwhile in conjunction with X expansion link mechanism 10 and damped part 2
Multivariant vibration isolation may be implemented, and can bear compared with big load.Generally speaking, non-linear rigidity damping provided by the invention
Multi-degree-of-freedom vibration isolation system has wide multi-degree-of-freedom vibration isolation, isolation frequency range, small in size, carrying weight, good without energy consumption, stability
The features such as, it is applied widely.
In one embodiment, the X-type bar 101 of the head end of X expansion link mechanism 10 is connect with the first attachment base 1, and X is flexible
The first support bar 10a and/or second support bar 10b of the X-type bar 101 of the head end of linkage 10 can be relative to the first attachment bases
1 is mobile.The X-type bar 101 of the end of X expansion link mechanism 10 is connect with the second attachment base 9, the X-type of the end of X expansion link mechanism 10
The first support bar 10a and/or second support bar 10b of bar 101 can be mobile relative to the second attachment base 9.So set, X stretches
The end of the first support bar 10a of the X-type bar 101 of the head end of rod reducing machine structure 10 and/or the end of second support bar 10b relative to
First attachment base 1 is mobile, at the same the end of the first support bar 10a of the X-type bar 101 of the end of X expansion link mechanism 10 and/
Or the end of second support bar 10b is mobile relative to the second attachment base 9, and then realizes the first support bar of each X-type bar 101
It is relatively rotated between 10a and second support bar 10b, and then realizes the flexible of X expansion link mechanism 10.
It specifically, being capable of phase with the end of the first support bar 10a of the X-type bar 101 of the only head end of X expansion link mechanism 10
It is mobile for first attachment base 1, and the end of the first support bar 10a of the X-type bar 101 of the end of X expansion link mechanism 10
It can be mobile relative to the second attachment base 9.So set, structure is simple and function is identical.
It is possible to further be provided with sliding slot 11 or sliding rail, X telescopic rod on the first attachment base 1 and the second attachment base 9
When mechanism 10 stretches, the edge first support bar 10a and/or second support bar 10b of the X-type bar 101 of the head end of X expansion link mechanism 10
The first attachment base 1 sliding slot 11 or sliding rail sliding, while the first support bar of the X-type bar 101 of the end of X expansion link mechanism 10
10a and/or second support bar 10b is slided along the sliding slot 11 or sliding rail of the second attachment base 9.Specifically, X expansion link mechanism 10
The end of the first support bar 10a of the X-type bar 101 of head end and/or the end of second support bar 10b and sliding slot 11 or sliding rail slide
Cooperation, the end of the first support bar 10a of the X-type bar 101 of the end of X expansion link mechanism 10 and/or the end of second support bar 10b
Portion is slidably matched with sliding slot 11 or sliding rail, to realize the flexible of X expansion link mechanism 10.
The end of first support bar 10a or the end of second support bar 10b are fastened in sliding slot 11 or sliding rail and being capable of edges
Sliding slot 11 or sliding rail sliding.
In another embodiment, idler wheel is can be set in the end of first support bar 10a or the end of second support bar 10b, is led to
Idler wheel is crossed to roll along the first attachment base 1 or the second attachment base 9 to realize that first support bar 10a or second support bar 10b are opposite
It is mobile in the first attachment base 1 or the second attachment base 9.
It is preferably, hinged by bearing 12 between the first support bar 10a and second support bar 10b of each X-type bar 101,
Or can also be hinged by hinge or articulated shaft between the first support bar 10a and second support bar 10b of each X-type bar 101,
As long as guaranteeing to be relatively rotatable to each other between first support bar 10a and second support bar 10b, it is not limited thereto.
The first support bar 10a of an X-type bar 101 and the second of another X-type bar 101 in two adjacent X-type bars 101
It is hinged by bearing 12 between support rod 10b, the second support bar 10b of an X-type bar 101 and the first of another X-type bar 101
It is hinged by bearing 12 between support rod 10a.Alternatively, in two adjacent X-type bars 101 an X-type bar 101 first support bar
It is hinged by hinge or articulated shaft between 10a and the second support bar 10b of another X-type bar 101, the second of an X-type bar 101
It is hinged by hinge or articulated shaft between support rod 10b and the first support bar 10a of another X-type bar 101.As long as guaranteeing one
It is relatively rotatable to each other between the first support bar 10a of X-type bar 101 and another X-type bar 101, second of an X-type bar 101
It is relatively rotatable to each other, is not limited thereto between strut 10b and the first support bar 10a of another X-type bar 101.
X expansion link mechanism 10 can specifically include two X-type bars 101, certainly according to the actual situation can also include three
Or more X-type bar 101, be not limited thereto.
In another embodiment, the quantity of X expansion link mechanism 10 is multiple, and multiple X expansion link mechanisms 10 are stretched
Contracting direction is parallel to each other.I.e. multiple X expansion link mechanisms 10 are arranged in parallel, and certain multiple X expansion link mechanisms 10 can not also
It is parallel to each other, is not limited thereto.
Further, non-linear rigidity damping multi-degree-of-freedom vibration isolation system further includes two X expansion link mechanisms 10 of connection
Connecting rod 4, one end of connecting rod 4 is connect with one of expansion link mechanism and the other end is connect with another expansion link mechanism, even
Bar 4 is parallel to the setting of the articulated shaft between first support bar 10a and second support bar 10b.It the both ends of connecting rod 4 can be respectively with two
A X expansion link mechanism 10 is fixedly connected.Alternatively, connecting rod 4 can be the articulated shaft of two adjacent X-type bars 101, i.e. connecting rod 4 is same
When across adjacent first support bar 10a and second support bar 10b, and above-mentioned first support bar 10a and second support bar 10b with
Connecting rod 4 is articulated shaft rotation connection.Drive connecting rod 4 mobile in 10 telescopic process of X expansion link mechanism.
The quantity of connecting rod 4 can be multiple, two connecting rods 4 being parallel to each other of setting between two adjacent X-type bars 101,
So that entire X expansion link mechanism 10 is more stable.
Further, the first end of elastomeric element 8 is fixedly connected with a connecting rod 4, and such X expansion link mechanism 10 stretched
It can drive the first end of elastomeric element 8 mobile simultaneously when driving connecting rod 4 mobile in journey, and then realize that X expansion link mechanism 10 is flexible
Compression or elongated elastomeric member 8 in the process.
For the ease of adjusting the elastic property of elastomeric element 8, above-mentioned non-linear rigidity damping multi-degree-of-freedom vibration isolation system is also
It may include the regulating device for adjusting the deformation of elastomeric element 8.
Specifically, regulating device may include being set to the first attachment base 1 or baffle 6 on the second attachment base 9, being fixed on
Nut 7 on baffle 6 and the screw 5 cooperated with nut 7, the first end of elastomeric element 8 are connect with connecting rod 4, and the of elastomeric element 8
Two ends are fixedly connected with screw 5, and rotation screw 5 is to drive the second end of elastomeric element 8 close to or far from the first of elastomeric element 8
End.Wherein, screw 5 can be goat's horn screw.When elastomeric element 8 first end can also with any first support bar 10a or appoint
One second support bar 10b connection, is not limited thereto.
In another embodiment, regulating device can also include the baffle being set on the first attachment base 1 or the second attachment base 9
6 driving parts mobile with driving baffle 6, the second end of elastomeric element 8 are connect with baffle 6, and driving part drives baffle 6 mobile
So that first end of the second end of elastomeric element 8 close to or far from elastomeric element 8.Driving part can drive for telescoping cylinder or straight line
Dynamic device, is not limited thereto.
The both ends of above-mentioned elastomeric element 8 can be connect with two connecting rods 4 respectively or the both ends of elastomeric element 8 can also be with
It is connect respectively with the first support bar 10a of X-type bar 101 and second support bar 10b.Certainly, the both ends of elastomeric element 8 can also be divided
It does not connect, is not limited thereto with two adjacent X-type bars 101.
Elastomeric element 8 can be any flexible for combiner of spring, damper or spring and damper etc.
Component is not limited thereto.The stiffness characteristics or damping characteristic of elastic component can be it is linear be also possible to it is nonlinear.
First support bar 10a and second support bar 10b can be hollow pipe or solid hopkinson bar.
Damped part 2 can be the column of rubber material.
The groove 3 for accommodating damped part 2, damped part 2 can be set on first attachment base 1 or the second attachment base 9
Bottom be fixedly connected or abut with 3 bottom of groove, between damped part 2 and the side wall of groove 3 have gap.Damped part
2 can stretch out the notch of groove 3 or damped part 2 is concordant with the notch of groove 3 is arranged, and be not limited thereto.Damped part 2
Height and diameter can sets itself according to the actual situation.
Wherein, the telescopic direction of elastomeric element 8 can with it is hinged between first support bar 10a and second support bar 10b
Axis is mutually perpendicular to.One end of damped part 2 to the other end extending direction also with first support bar 10a and second support bar 10b
Between articulated shaft be mutually perpendicular to.
One end of above-mentioned damped part 2 to the other end extending direction and elastomeric element 8 telescopic direction between have folder
Angle.Preferably, one end of damped part 2 to the other end extending direction and elastomeric element 8 telescopic direction between be mutually perpendicular to.
The length of the first support bar 10a and second support bar 10b of any X-type bar 101 can according to the actual situation voluntarily
Setting.The length of multiple first support bar 10a in same X expansion link mechanism 10 can be the same or different, and same X is flexible
The length of multiple second support bar 10b in linkage 10 can be the same or different.In different X expansion link mechanisms 10
The length of multiple first support bar 10a can be the same or different, multiple second supports in different X expansion link mechanisms 10
The length of bar 10b can be the same or different, and be not limited thereto.
First attachment base 1 and the second attachment base 9 can include the left mounting blocks and right mounting blocks being oppositely arranged, left installation
Crossbeam is provided between block and right mounting blocks, the both ends of crossbeam are fixedly connected with left mounting blocks and right mounting blocks respectively.Crossbeam with
Gasket can be set between left mounting blocks and right mounting blocks, to further increase vibration isolating effect, above-mentioned gasket can be rubber pad
Piece or silica gel pad, are not limited thereto.
Non-linear rigidity damping multi-degree-of-freedom vibration isolation system provided by the invention is designed based on bionical leg type structure, is had
The vibration isolating effect of adjustable non-linear rigidity damping, passes through the combination of X expansion link mechanism 10, elastomeric element 8 and damped part 2
Design, thus it is possible to vary the quantity of X-type bar 101, the length of first support bar 10a and second support bar 10b, damping ratio, elastic component
Precompressed/pulling force, the initial settling angle degree of first support bar 10a and second support bar 10b, with adjust non-linear rigidity damping it is more
The equivalent non-linear rigidity of freedom degree vibrating isolation system and damping allow non-linear rigidity damping multi-degree-of-freedom vibration isolation system real
Existing adjustable non-linear rigidity and damping characteristic, so that non-linear rigidity of the invention damps multi-degree-of-freedom vibration isolation system
It can satisfy different vibration isolation demands.
Also there is good bearing capacity and stability simultaneously, it is applied widely, it can be used as stronger bearing capacity
Vibration-isolating platform can effectively be applied under the different vibration background such as aviation, automobile, large scale structure.
It the following is and analyzed by mathematical modeling, this non-linear rigidity damps the Static stiffness formula of multi-degree-of-freedom vibration isolation system:
Wherein:
L is the length of rotating bar；
θ is initial settling angle degree (first support bar and second support bar and the level of first support bar and second support bar
The acute angle in face)；
Kl is elastic component rigidity (Nm-1)；
N is the quantity (the example given n=2 herein) of X-type bar in X expansion link mechanism；
For the relative displacement between the first attachment base of vertical direction and the second attachment base；
The non-linear rigidity, which damps the dynamic rate of multi-degree-of-freedom vibration isolation system and damped coefficient, has the non-of following form
It is linear:
Embodied in Fig. 4 non-linear rigidity damping multi-degree-of-freedom vibration isolation system static rigidity and system parameters value it
Between relationship.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of non-linear rigidity damps multi-degree-of-freedom vibration isolation system characterized by comprising
First attachment base (1) and the second attachment base (9)；
The X expansion link mechanism (10) being set between first attachment base (1) and the second attachment base (9), the X telescopic rod machine
Structure (10) includes at least one X-type bar (101), and X-type bar (101) includes first support bar that is arranged in a crossed manner and being hinged
(10a) and second support bar (10b), the first support bar (10a) and second support bar of each X-type bar (101)
(10b) is relatively rotated to realize the flexible of the X expansion link mechanism (10)；
Damped part (2), one end of the damped part (2) and first attachment base (1) or the second attachment base (9) are relatively solid
It is fixed；
Elastomeric element (8) is stretched or is compressed the elastomeric element (8) when the X expansion link mechanism (10) is flexible.
2. non-linear rigidity according to claim 1 damps multi-degree-of-freedom vibration isolation system, which is characterized in that the X is flexible
The X-type bar (101) of the head end of linkage (10) is connect with first attachment base (1), the head end of the X expansion link mechanism (10)
X-type bar (101) first support bar (10a) and/or second support bar (10b) can be relative to first attachment base (1)
It is mobile；
The X-type bar (101) of the end of the X expansion link mechanism (10) is connect with second attachment base (9), the X telescopic rod
The first support bar (10a) and/or second support bar (10b) of the X-type bar (101) of the end of mechanism (10) can be relative to described
Second attachment base (9) is mobile.
3. non-linear rigidity according to claim 2 damps multi-degree-of-freedom vibration isolation system, which is characterized in that described first connects
Sliding slot (11) or sliding rail are provided on joint chair (1) and the second attachment base (9), it is described when the X expansion link mechanism (10) is stretched
The first support bar (10a) and/or second support bar (10b) of the X-type bar (101) of the head end of X expansion link mechanism (10) are along institute
State sliding slot (11) or the sliding rail sliding of the first attachment base (1), the of the X-type bar (101) of the end of the X expansion link mechanism (10)
One support rod (10a) and/or second support bar (10b) are slided along the sliding slot (11) or sliding rail of second attachment base (9).
4. non-linear rigidity according to claim 1 damps multi-degree-of-freedom vibration isolation system, which is characterized in that each X-type bar
(101) hinged by bearing (12) between the first support bar (10a) and second support bar (10b)；
The first support bar (10a) of an X-type bar (101) and another X-type bar (101) in two adjacent X-type bars (101)
Between second support bar (10b) hingedly by bearing (12), the second support bar (10b) and another X of an X-type bar (101)
It is hinged by bearing (12) between the first support bar (10a) of type bar (101).
5. non-linear rigidity according to claim 1 damps multi-degree-of-freedom vibration isolation system, which is characterized in that the X is flexible
The quantity of linkage (10) is multiple, and the telescopic direction of multiple X expansion link mechanisms (10) is parallel to each other；
Non-linear rigidity damping multi-degree-of-freedom vibration isolation system further includes the connecting rod (4) for connecting two X expansion link mechanisms (10), institute
The one end for stating connecting rod (4) is connect with one of expansion link mechanism and the other end is connect with another expansion link mechanism, the company
Bar (4) is parallel to the setting of the articulated shaft between first support bar (10a) and second support bar (10b).
6. non-linear rigidity according to claim 5 damps multi-degree-of-freedom vibration isolation system, which is characterized in that the connecting rod
It (4) is the articulated shaft of two adjacent X-type bars (101).
7. non-linear rigidity according to claim 5 damps multi-degree-of-freedom vibration isolation system, which is characterized in that the elastic portion
The first end of part (8) is fixedly connected with a connecting rod (4).
8. non-linear rigidity according to claim 7 damps multi-degree-of-freedom vibration isolation system, which is characterized in that further include being used for
Adjust the regulating device of the deformation of the elastomeric element (8).
9. non-linear rigidity according to claim 8 damps multi-degree-of-freedom vibration isolation system, which is characterized in that the adjusting dress
It sets including the baffle (6) being set on the first attachment base (1) or the second attachment base (9), the nut being fixed on the baffle (6)
(7) it is fixedly connected with the screw (5) with the nut (7) cooperation, the second end of the elastomeric element (8) with the screw (5),
The screw (5) is rotated to drive the second end of the elastomeric element (8) close to or far from its first end.
10. non-linear rigidity according to claim 1 damps multi-degree-of-freedom vibration isolation system, which is characterized in that the elasticity
Articulated shaft between the telescopic direction and first support bar (10a) and second support bar (10b) of component (8) is mutually perpendicular to.
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| CN112161018A (en) * | 2020-09-22 | 2021-01-01 | 东南大学 | Infrastructure large-bearing multi-direction vibration isolating and reducing device and disaster prevention method thereof |
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Application publication date: 20181221 |