CN115263958A - Lattice structure with heat transfer and energy absorption and vibration reduction characteristics - Google Patents
Lattice structure with heat transfer and energy absorption and vibration reduction characteristics Download PDFInfo
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- CN115263958A CN115263958A CN202210721329.1A CN202210721329A CN115263958A CN 115263958 A CN115263958 A CN 115263958A CN 202210721329 A CN202210721329 A CN 202210721329A CN 115263958 A CN115263958 A CN 115263958A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract
The invention relates to the technical field of intersection of structure lightweight design and vibration control, and particularly discloses a lattice structure with heat transfer and energy absorption and vibration reduction characteristics, which comprises a plurality of groups of energy absorption layers which are sequentially stacked, wherein each group of energy absorption layers comprises a plurality of cell structures which are periodically arranged; the cell structure comprises a plurality of groups of inner bending pieces in a polygonal or circular array, connecting pieces used for connecting the end parts of two adjacent groups of inner bending pieces and forming a cage structure, and two groups of supporting and clamping pieces which are positioned in the cage structure and are respectively connected with the connecting pieces. The invention has good comprehensive properties of local resonance vibration reduction, elastic energy absorption, heat transfer, adjustable rigidity and the like; compared with a solid structure, the lattice structure of the invention has light weight.
Description
Technical Field
The invention relates to the technical field of intersection of structure lightweight design and vibration control, in particular to a lattice structure with heat transfer and energy absorption and vibration reduction characteristics.
Background
In order to realize longer voyage and more effective loads, various electronic equipment on maneuvering and moving platforms such as aviation, spaceflight and vehicle-mounted platforms need to be lightened as much as possible, wherein the structure lightweight design is just needed, and the lattice structure is used as a novel weight reduction means and has the characteristics of good weight reduction effect, high specific stiffness and the like; in recent years, the application of the lattice structure in weight reduction is increasing, however, various devices installed on aviation, aerospace and vehicle-mounted platforms are influenced by severe environments such as impact, vibration and high temperature, so that the device structure generates thermal stress, mechanical stress and the like, and the structure is easily damaged and destroyed, therefore, the lattice structure not only needs to have weight reduction and rigidity functions or performances, but also needs to have various functions such as vibration reduction, buffering and heat dissipation.
The negative Poisson ratio structure is a special microstructure, the Poisson ratio parameter of a macroscopic equivalent material consisting of the negative Poisson ratio structure is negative (the Poisson ratio of a common material is positive), and when the macroscopic structure is stretched and deformed, the microscopic negative Poisson ratio structure can expand in the transverse direction, so that energy absorption is realized, and the negative Poisson ratio structure is mainly used for the buffer action of the structure. The phononic crystal structure is a special periodic structure, and through periodic design of parameters such as structural form, composition materials, mass distribution and the like, the inhibition of elastic wave energy transmission (namely forbidden band effect) in a specific vibration frequency range can be realized, so that the vibration reduction effect in the vibration frequency range is realized. At present, two elastic wave forbidden band generation mechanisms, namely Bragg scattering and local resonance exist in a photonic crystal structure, wherein the local resonance can realize the forbidden band effect of controlling large wavelength in a small size, and has good practicability on low-frequency vibration and noise reduction, so that more and more attention is paid to the application in lattice structure design. Because the lattice structure is a hollow structure, the interface of a heat conduction path of the structure is reduced, the heat dissipation capability of the structure is further reduced, and the heat dissipation capability of the lattice structure is enhanced and the design of light weight is also realized.
In the known embodiment in the field, chinese patent CN202010608028.9 discloses a novel three-dimensional chiral negative poisson ratio multicellular energy absorption structure, which comprises a plurality of energy absorption layers stacked in sequence, wherein each energy absorption layer comprises a plurality of hexagonal chiral structure unicells, and through stacking of micro structures, the elastic displacement of the structure before reaching the yield limit is improved, and the initial impact force is absorbed by using larger displacement, so that the structure has a great advantage in absorbing concentrated, multiple and small-magnitude impact energy, but the energy consumption and vibration reduction capability is weak;
chinese patent CN201811466741.3 discloses a lattice structure with vibration isolation characteristics, wherein a single cell of the lattice structure is a body-centered cubic structure, and a mass block is added at the body center to form a vibrator structure, so that vibration suppression can be performed in a lower frequency range, the specific stiffness is higher, and the lattice structure can be used for vibration isolation facilities with bearing requirements, but the lattice structure has general buffer performance, is not suitable for strong impact environment application, and has no heat dissipation capability;
chinese patent CN202010511182.4 discloses a lattice structure with stable zero poisson's ratio in a large deformation state, the unit cell structure of which is composed of linear rods and curved rods, and the lattice structure is formed by an array in XYZ three directions, so that the lattice structure has the characteristics of light weight and high energy absorption, but the vibration reduction and specific stiffness performance are relatively poor;
chinese patent CN202011200569.4 discloses a low-frequency vibration-damping light metamaterial lattice structure and a manufacturing method thereof, the metamaterial lattice structure is composed of single cells which are periodically arranged in two dimensions, the single cells comprise a pyramid-shaped sandwich structure base structure and a rectangular stainless steel-nylon resonance unit which is embedded in the base structure, the resonance unit structure which is periodically arranged is designed to generate a wide frequency gap in a low-frequency range to realize vibration damping, and the metamaterial lattice structure has a certain bearing capacity, but the structure manufacturing process is complex, and the thermal conductivity is poor.
The lattice structures disclosed in the patent applications are difficult to meet the comprehensive requirements of equipment on aviation, aerospace and vehicle-mounted platforms on vibration reduction, buffering, heat dissipation and light weight.
Disclosure of Invention
The invention aims to solve the technical problem of providing a lattice structure which gives consideration to heat transfer and energy absorption and vibration reduction characteristics; the composite material has good comprehensive properties of local resonance vibration reduction, elastic energy absorption, heat transfer, adjustable rigidity and the like; the lattice structure of the present invention should be lightweight compared to solid structures.
The technical problem to be solved by the invention is as follows:
a lattice structure giving consideration to heat transfer, energy absorption and vibration reduction characteristics comprises a plurality of groups of energy absorption layers which are sequentially stacked, wherein each group of energy absorption layers comprises a plurality of cell structures which are periodically arranged;
the cell structure comprises a plurality of groups of inner bending pieces in a polygonal or circular array, connecting pieces used for connecting the end parts of two adjacent groups of inner bending pieces and forming a cage structure, and two groups of supporting and clamping pieces which are positioned in the cage structure and are respectively connected with the connecting pieces.
In the invention, the inner bending part and the connecting part in a single cell structure form a local resonance area, when a vibration load acts, a mass oscillator-spring system formed in the local resonance area 200 can generate local resonance to generate a frequency forbidden band effect, so that the vibration energy in a required expected frequency band is greatly attenuated, and the vibration reduction effect is realized;
the invention is connected by a plurality of cell structures, and a heat path area is formed at the connection position; when the heating source is arranged in a heat path area formed at the connecting part of the inward bending piece and the connecting piece, the rapid heat dissipation and transfer can be realized;
when impact load acts on the invention, an elastic rod system formed by the inner bending piece and the connecting piece generates elastic deformation, and the impact kinetic energy is converted into mechanical deformation potential energy to realize impact energy absorption.
In some possible embodiments, the mass block is located between the two sets of supporting clamps and connected to the two sets of supporting clamps respectively.
In some possible embodiments, in order to provide good damping of the recurved piece;
the inner bending piece comprises a first inner bending column with an arc-shaped structure and an outward opening, and a second inner bending column with two ends respectively connected with two ends of the first inner bending column and an arc-shaped structure; the opening of the second inward-bent column faces outwards; the included angle formed by the first inward-bent column and the second inward-bent column with two ends connected with each other is smaller than 90 degrees.
In some possible embodiments, in order to effectively cooperate with the inward bending part, the formed rod system structure can generate enough deformation, and can effectively absorb impact kinetic energy and convert the impact kinetic energy into mechanical deformation potential energy;
the connecting piece comprises connecting components which are symmetrically arranged and are used for connecting the end parts of the two adjacent groups of inward bent pieces on the same side;
the connecting assembly comprises a first bending rod which is connected with the end part of the adjacent inner bending piece at the same side and is V-shaped; the opening of the first bending rod faces outwards; the end part of the first bending rod and the end part of the inner bending piece are on the same plane.
In some possible embodiments, in order to effectively fix the mass mounted within the cage structure;
the supporting and clamping piece comprises two groups of supporting pieces which are positioned in the cage structure and are respectively connected with the two groups of connecting components; two sets of support piece sets up in opposite directions and the plane mutually perpendicular at place.
In some of the possible embodiments, the first and second,
the supporting piece comprises a third bending rod in a V-shaped structure and a short rod for connecting the third bending rod and the first bending rod; the openings of the two groups of the third bending rods are oppositely arranged to form a clamping cavity.
In some of the possible embodiments of the present invention,
the free ends of the two bending rods III close to one side are connected with the corresponding bending rods I through connecting rods.
In some of the possible embodiments, the first and second,
the support piece includes that two sets of be the slope setting and one end is located cage structure's round bar, be used for connecting round bar and the short-circuit beam of being connected of bending pole one and be connected respectively with two sets of connecting pieces and be located cage structure's short-circuit beam two.
In some of the possible embodiments, the first and second,
the connecting piece comprises a first arc-shaped bent rod which is obliquely arranged, and two ends of the first arc-shaped bent rod and the top ends and the bottom ends of the two adjacent groups of inner bent pieces are respectively connected with the first arc-shaped bent rod;
the opening of the first arc-shaped bent rod is arranged at the outer side of the cage-type structure;
in some of the possible embodiments, the first and second,
the supporting and clamping piece comprises a plurality of short rods III which are arranged on the inner side of the arc-shaped bent rod I.
In some of the possible embodiments, the first and second,
and a clamping cavity is formed between the two groups of supporting clamping pieces, and the lattice structure further comprises mass blocks which are positioned between the two groups of supporting clamping pieces and are respectively connected with the two groups of supporting clamping pieces.
Compared with the prior art, the invention has the beneficial effects that:
the invention has higher void ratio and lighter weight compared with a solid structure; the adjustment of different support rigidity can be realized by changing the layout, data volume and rod section size of the bending rod, the first inner bending column, the second bending rod and the third bending rod, so as to meet the structural deformation control requirements of different platform devices;
according to the invention, a typical mass vibrator-spring structure is formed among the mass block, the first bending rod, the first inner bending column, the second inner bending column and the third bending rod, so that a local resonance forbidden band effect can be generated in a vibration environment, vibration energy in a required expected frequency band is greatly attenuated, and the structural rigidity and the mass block of the invention are adjustable, so that the expected vibration attenuation frequency band can be adjusted, and the vibration attenuation requirements of different equipment structures are met;
compared with the traditional lattice structure, the invention can meet the heat conduction requirement of the heating point position, lightens the adverse effect of the hollow structure on the heat conduction path as much as possible, and can meet the heat conduction design requirement of electronic equipment and the like.
The invention forms a complex-variant negative Poisson ratio structure, not only has better supporting rigidity than the original negative Poisson ratio structure, but also under the action of impact load, a rod system structure consisting of a first bending rod, a first inner bending column, a second bending rod and a third bending rod of the lattice structure can generate enough deformation, and the bar system structure can absorb impact kinetic energy like a spring and convert the impact kinetic energy into mechanical deformation potential energy;
the invention has the advantages of good weight reduction effect, adjustable supporting rigidity, outstanding vibration reduction effect, excellent conduction and heat dissipation performance, good energy absorption effect and the like, and can well meet the design requirements of light weight and heat and force environmental adaptability of various electronic equipment on platforms of aviation, aerospace and the like.
Drawings
Fig. 1 is a schematic structural view of a cell structure in example 1 of the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a schematic structural view of a cell structure in example 2 of the present invention;
fig. 4 is a schematic structural view of a cell structure in example 3 of the present invention;
fig. 5 is a schematic structural view of a cell structure in example 4 of the present invention;
fig. 6 is a schematic structural view of a cell structure in example 5 of the present invention;
fig. 7 is a schematic structural view of a cell structure according to embodiment 6 of the present invention;
wherein: 10. a cell structure; 1. an inner bend; 11. a first inward-bent column; 12. a second inward-bent column; 2. a connecting member; 21. bending the first rod; 22. a short column I; 23. a first arc-shaped bent rod; 3. supporting the clamping member; 31. bending a third rod; 32. a short bar; 33. a clamping cavity; 34. a connecting rod; 35. a round bar; 36. connecting a short rod; 37. a short rod II; 38. a short rod III; 4. a mass block; 100. a heat transfer path region; 200. a localized resonance region.
Detailed Description
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; either directly or indirectly through intervening media, either internally or in any other relationship. Reference herein to "first," "second," and similar words, does not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. In the implementation of the present application, "and/or" describes an association relationship of associated objects, which means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, the plurality of positioning posts refers to two or more positioning posts. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention will be described in detail below.
Example 1:
as shown in fig. 1 and 2:
a lattice structure giving consideration to heat transfer, energy absorption and vibration reduction characteristics comprises a plurality of groups of energy absorption layers which are sequentially stacked, wherein each group of energy absorption layers comprises a plurality of cell structures 10 which are periodically arranged;
as shown in fig. 1, the cell structure 10 includes a plurality of groups of inflected members 1 in a hexagonal array, connecting members 2 for connecting the ends of two adjacent groups of inflected members 1 and forming a cage structure, two groups of supporting and clamping members 3 located in the cage structure and respectively connected to the two groups of connecting members 2, and mass blocks 4 located between the two groups of supporting and clamping members 3 and respectively connected to the two groups of supporting and clamping members 3.
The inner bending pieces 1 are arranged along the Y-axis direction, the connecting pieces 2 are two groups, and two ends of all the inner bending pieces 1 are respectively connected to form a cage type structure.
The hexagon can be a quadrangle, a pentagon, a circle or the like;
in some possible embodiments, the inward bending member 1 includes a first inward bending column 11 with an arc-shaped structure and an outward opening, and a second inward bending column 12 with two ends respectively connected with two ends of the first inward bending column 11 and an arc-shaped structure; the opening of the second inward bending column 12 faces outwards; the included angle formed by the first inward-bent column 11 and the second inward-bent column 12 with two ends connected with each other is 45 degrees. The term open outwards as used herein refers to the side facing away from the cage structure.
Preferably, the included angle can also be realized by the included angle degree of 30 degrees, 40 degrees and 50 degrees and 60 degrees.
In some possible embodiments, the connecting member 2 comprises connecting members symmetrically arranged along the Z-axis and used for connecting the same-side ends of two adjacent groups of the inward-bending members 1; the connecting assembly comprises a first bending rod 21 which is connected with the end part of the adjacent inner bending piece 1 at the same side and is V-shaped, and a first short column 22 which is arranged at the bending part of the first bending rod 21 and is vertically arranged;
the free end of the first short column 22 is positioned on the same plane with the end part of the first bending rod 21 and the end part of the inward bending piece 1.
In some possible embodiments, said support clamps 3 comprise two sets of support members located within the cage structure and connected to two sets of connection members, respectively; two sets of support piece sets up in opposite directions and the plane mutually perpendicular at place.
The supporting piece comprises a third bending rod 31 in a V-shaped structure and a short rod 32 for connecting the third bending rod 31 and the first bending rod 21; the openings of the two groups of the three bending rods 31 are oppositely arranged to form a clamping cavity 33.
As shown in fig. 1, a set of bent rods three 31, which are open downwards, are connected to the inner bent members 1 above the cage structure by short rods 32;
the openings of the other group of bending rods III 31 are upward, and the inner bending parts 1 positioned at the bottom of the cage structure are connected through short rods 32; the bending rods III 31 form a clamping cavity 33, the mass block 4 is positioned in the clamping cavity 33, and the mass block 4 is supported and fixed through supporting short columns which are arranged on the bending rods III 31 and positioned in the clamping cavity 33;
in the embodiment, a typical mass vibrator-spring structure is formed among the mass block 4, the first bending rod 21, the first inward-bending column 11, the second inward-bending column 12 and the third bending rod 31, so that a local resonance forbidden band effect can be generated in a vibration environment, and vibration energy in a required expected frequency band is greatly attenuated; meanwhile, the structural rigidity and the mass block 4 of the damping device are adjustable, so that the expected damping frequency band can be adjusted, and the damping device is suitable for damping requirements of different equipment structures.
In this embodiment, as shown in fig. 2, after the plurality of cell structures 10 are connected, a heat transfer path area 100 is formed at the connection position, so as to satisfy the heat conduction requirement of the heating point position, achieve rapid heat dissipation and transfer, reduce the adverse effect of the structure hollowing on the heat transfer path as much as possible, and satisfy the heat conduction design requirement of the electronic device and the like.
In this embodiment, the rod system structure formed by the first bending rod 21, the first inward bending column 11, the second inward bending column 12 and the third bending rod 31 not only has better supporting rigidity than the original negative poisson structure, but also can generate enough deformation under the action of impact load, and absorb impact kinetic energy like a spring to convert the impact kinetic energy into mechanical deformation potential energy.
In the invention, both the inward bending part 1 and the connecting part 2 are realized by adopting bending parts, and the inward bending part and the connecting part mainly act on parts which are bent to have good elastic deformation; therefore, when the device is used, impact kinetic energy can be converted into mechanical deformation potential energy, and impact energy absorption is realized.
Example 2:
as shown in fig. 3:
compared with the embodiment 1, the present embodiment is different in that the mass block 4 is not disposed in the clamping cavity 33 formed by the two sets of supporting and clamping members 3;
in the lattice unit with low damping requirement, the lattice structure with heat transfer and energy absorption characteristics is constructed.
Example 3:
as shown in fig. 4:
compared with the embodiment 1, in the embodiment, four new connecting rods 34 are added to connect the four free ends of the two groups of bending rods three 31 with the middle positions of the four bending rods one 21 corresponding to the four free ends respectively;
other components, installation and connection relations are the same as those of the embodiment 1, a new cell structure 10 is formed, and a lattice structure which has better supporting rigidity and gives consideration to heat dissipation, energy absorption and vibration reduction characteristics is constructed by copying the array of the cell structure 10.
Example 4:
as shown in fig. 5:
the difference between this embodiment and embodiment 1 is that the supporting member includes two sets of obliquely arranged round rods 35 with one end located in the cage structure, connecting short rods 36 for connecting the round rods 35 with the first bending rods 21, and two short rods 37 respectively connected with the two sets of connecting members 2 and located in the cage structure.
The support member is not in a V-shaped structure any more, a second short rod 37 is directly arranged at the central part of a first bending rod 21 which is not on the same plane, the second short rod 37 is obliquely arranged, the free end of the second short rod is positioned in the cage-type structure, the upper side and the lower side of the mass block 4 are supported by adopting two sets of second short rods 37, a round rod 35 is connected with the central part of a third bending rod 31 through a connecting short rod 36 and is positioned in the cage-type structure, and the round rod 35 is connected with the third bending rod 31 which is not connected with the round rod 37;
according to the use requirement, the second short rod 37 can adopt a symmetrical arrangement or an asymmetrical arrangement, which is determined by considering the asymmetry of the lattice structure;
as shown in fig. 5, in the set of links 2, after the second short rod 37 is connected to the first bent rod 31, the round rod 35 connects the bent rod 31 opposite to the bent rod 31 via the short rod 36. The round rods 36 and the second short rods 37 are obliquely arranged and in the cage structure, and the short rods 36 and the second short rods 37 connected with the connecting piece 2 on the same side are arranged in parallel in fig. 5.
By copying the array of the cell structure 10, a lattice structure with lower support rigidity and taking heat dissipation and energy absorption and vibration reduction characteristics into account is constructed.
When the present embodiment employs 3D additive manufacturing, support structures will be added; and will not be described in detail herein.
Example 5:
as shown in fig. 6 and 7:
the present embodiment is different from embodiment 1 in that:
the connecting piece 2 comprises a first arc-shaped bent rod 23 which is obliquely arranged, and two ends of the first arc-shaped bent rod are respectively connected with the top end and the bottom end of each of two adjacent groups of the inner bent pieces 1; the opening of the first arc bent rod 23 is arranged at the outer side of the cage structure; the supporting and clamping member 3 comprises a plurality of short rods 38 arranged on the inner side of the first arc-shaped bent rod 23.
In the embodiment, the structure of the connecting piece 2 and the connection relation between the connecting piece 2 and the inward-bending piece 1 are changed, and the support clamping piece 3 adopts the short rods three 38 arranged on the inner side of the connecting piece 2 to realize the support of the mass block 4;
the connecting piece 2 adopts an arc bent rod I23 and is obliquely arranged, and an opening is outwards arranged on one side far away from the cage structure; the two ends of each arc-shaped bent rod I23 are respectively connected with the top ends of one group of the inner bent parts 1 in the two adjacent groups and the bottom ends of the other group of the inner bent parts 1, and the top ends of the inner bent parts 1 connected with the bottom ends by the arc-shaped bent rods I23 are connected when the inner bent parts 1 are connected with the other group of the inner bent parts 1 through the other group of the arc-shaped bent rods I23; forming a cage structure formed by connecting the bottom ends and the top ends of all the inward-bending pieces 1;
the short rod III 38 is arranged at the central part of the arc bent rod I23 and is positioned in the cage structure and used for supporting the mass block 4;
when 3D (three-dimensional) additive manufacturing is adopted, an arc-shaped bent column is printed on the first arc-shaped bent rod 23 for effectively realizing manufacturing;
the arc-shaped bent columns can be two arc-shaped structures which are arranged along the length direction of the inward bent piece 1 and connected with the central parts of the first arc-shaped bent rods 23 as shown in figure 7, and the openings of the arc-shaped bent columns are arranged at one side close to the cage-shaped structures; the arc-shaped bent column and the arc-shaped bent rod I23 are arranged in a cross shape.
Of course, the method can also be realized by adopting two arc-shaped columns which are uniformly arranged along the three long directions of the arc-shaped bent rod and have opposite super directions as shown in fig. 7; the arc-shaped bent column is mainly used for supporting in 3D additive manufacturing, and is not described in detail herein.
In the present invention, the mass 4 may be arranged or not arranged according to the use requirement, which is mainly determined by whether the present invention has a high damping requirement when in use.
The dot matrix of the present invention can be implemented by a single cell structure 10, or by a single layer structure formed by connecting a plurality of cell structures 10, or by a multi-layer structure stacked on top of each other; the specific requirement is determined according to the use requirement.
When the cell structures 10 are stacked in multiple layers, and each layer is formed by multiple cell structures 10, the inflected members 1 of adjacent dot matrix cell structures 10 are connected to form a heat transfer path region 100; as shown in fig. 1, an approximately hexahedral cage structure is formed by four groups of connecting pieces 2 and an inward bending piece 1 in an XY plane; the first short column 22 is arranged at the bending position in the middle of the first bending rod 21 in parallel with the Z axis, and forms an approximate negative Poisson's ratio structure with the first bending rod 21, the first inner bending column 11 and the second inner bending column 12; the first bending rod 21, the third bending rod 31, the first inner bending column 11, the second inner bending column 12, the supporting and clamping piece 3 and the mass block 4 jointly form a plurality of local resonance areas 200 in a lattice structure, and finally the lattice structure which gives consideration to heat transfer and energy absorption and vibration reduction characteristics is formed.
If the heating source is arranged in the heat path area, the heat can be quickly radiated and transferred;
when a vibration load acts on the lattice structure, the mass oscillator-spring system in the local resonance area 200200 can generate local resonance to generate a frequency forbidden band effect, so that the vibration reduction effect is realized.
When impact load acts on the lattice structure, an elastic rod system consisting of the first bending rod 21, the first inward bending column 11, the second inward bending column 12 and the third bending rod 31 is elastically deformed, impact kinetic energy is converted into mechanical deformation potential energy, and impact energy absorption is realized; the lattice structure with strong deformation capability, better heat dissipation capability and good energy absorption and vibration reduction characteristics is constructed.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A dot matrix structure giving consideration to heat transfer, energy absorption and vibration reduction characteristics is characterized by comprising a plurality of groups of energy absorption layers which are sequentially stacked, wherein each group of energy absorption layers comprises a plurality of cell structures which are periodically arranged;
the cell structure includes that the multiunit is the inflexion spare of polygon or circular array, is used for the end connection of adjacent two sets of inflexion spares and forms the connecting piece of cage structure and two sets of support holders that are located cage structure and are connected with the connecting piece respectively.
2. The lattice structure with heat transfer, energy absorption and vibration reduction characteristics as claimed in claim 1, wherein the inward-bending member comprises a first inward-bending column with an arc-shaped structure and an outward opening, and a second inward-bending column with two ends respectively connected with two ends of the first inward-bending column and an arc-shaped structure;
the opening of the second inward-bent column faces outwards; the included angle formed by the first inward-bent column and the second inward-bent column with two ends connected with each other is smaller than 90 degrees.
3. The lattice structure with heat transfer, energy absorption and vibration reduction characteristics as claimed in claim 1, wherein the connecting members comprise connecting members which are symmetrically arranged and are used for connecting the ends of two adjacent groups of inward-bent members at the same side;
the connecting assembly comprises a first bending rod which is connected with the end part of the adjacent inner bending piece at the same side and is V-shaped; the opening of the first bending rod faces outwards; the end part of the first bending rod and the end part of the inner bending piece are on the same plane.
4. A lattice structure having both heat transfer and energy absorbing and vibration damping characteristics as claimed in claim 3 wherein said support clamps comprise two sets of support members located within the cage structure and connected to the two sets of connecting members respectively; two sets of support piece sets up in opposite directions and the plane mutually perpendicular at place.
5. The lattice structure with heat transfer, energy absorption and vibration reduction characteristics as claimed in claim 4, wherein the support member comprises a third bending rod in a V-shaped structure, and a first short rod for connecting the third bending rod and the first bending rod; the openings of the two groups of the third bending rods are oppositely arranged.
6. A lattice structure with heat transfer, energy absorption and vibration damping functions as claimed in claim 5, wherein the free ends of the three adjacent sides of the two bending rods are connected with the corresponding first bending rod through connecting rods.
7. A lattice structure with both heat transfer and energy-absorbing and vibration-damping characteristics as claimed in claim 4, wherein said supporting members comprise two sets of round rods disposed in an inclined manner and having one end thereof located in the cage structure, connecting short rods for connecting the round rods with the first bending rods, and second short rods connected with the two sets of connecting members respectively and located in the cage structure.
8. The lattice structure with heat transfer, energy absorption and vibration reduction characteristics as claimed in claim 1, wherein the connecting member comprises a first arc-shaped bending rod which is obliquely arranged and two ends of the first arc-shaped bending rod and two ends of the second arc-shaped bending rod are respectively connected with the top end and the bottom end of each of two adjacent groups of inner bending members;
and the opening of the first arc bent rod is arranged at the outer side of the cage structure.
9. A lattice structure for both heat transfer and energy and vibration damping as claimed in claim 8, wherein said supporting and holding members comprise a plurality of short rods disposed on the inner side of the curved rods.
10. A lattice structure with both heat transfer and energy-absorbing and vibration-damping characteristics as claimed in any one of claims 1 to 9, wherein a clamping cavity is formed between the two sets of supporting and clamping members, and the lattice structure further comprises a mass block located between the two sets of supporting and clamping members and connected to the two sets of supporting and clamping members respectively.
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| CN115783117A (en) * | 2022-11-21 | 2023-03-14 | 中国船舶集团有限公司第七0三研究所 | Composite material isolation and flushing device based on multi-cell chiral periodic structure |
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