CN115263958B - Dot matrix structure with heat transfer and energy absorption vibration reduction characteristics - Google Patents
Dot matrix structure with heat transfer and energy absorption vibration reduction characteristics Download PDFInfo
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- CN115263958B CN115263958B CN202210721329.1A CN202210721329A CN115263958B CN 115263958 B CN115263958 B CN 115263958B CN 202210721329 A CN202210721329 A CN 202210721329A CN 115263958 B CN115263958 B CN 115263958B
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 32
- 230000009467 reduction Effects 0.000 title claims abstract description 29
- 239000011159 matrix material Substances 0.000 title description 2
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- 230000017525 heat dissipation Effects 0.000 description 10
- 238000013016 damping Methods 0.000 description 9
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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
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Abstract
The invention relates to the technical field of structure lightweight design and vibration control intersection, 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 inward bending pieces which are polygonal or circular arrays, connecting pieces which are used for connecting the end parts of two adjacent groups of inward bending pieces and form a cage structure, and two groups of supporting 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 structural lightweight design and vibration control intersection, 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 load, various electronic devices on maneuvering and moving platforms such as aviation, aerospace and vehicle-mounted are required to be lightened as much as possible, wherein the lightweight design of the structure is just needed, and the lattice structure is used as a novel weight reduction means, so that the device has the characteristics of good weight reduction effect, high specific stiffness and the like; in recent years, the weight reduction of various devices is increasingly applied, however, various devices installed on aviation, aerospace and vehicle-mounted platforms are affected by severe environments such as impact, vibration and high temperature, so that thermal stress, mechanical stress and the like are generated on the device structure, and damage and destruction of the structure are easily caused, and therefore, the lattice structure not only needs weight reduction, rigidity function or performance, but also needs to have multiple functions such as vibration reduction, buffering and heat dissipation.
The negative poisson ratio structure is a special microstructure, the poisson ratio parameter of the macroscopic equivalent material formed by the structure is represented as a negative number (the poisson ratio of the common material is positive), and when the macroscopic structure is stretched and deformed, the microcosmic negative poisson ratio structure can generate expansion phenomenon in the transverse direction, so that energy absorption is realized, and the structure is mainly used for buffering the structure. The phonon crystal structure is a special periodic structure, and through the periodic design of parameters such as structural morphology, component materials, mass distribution and the like, the vibration damping effect of the vibration frequency range can be realized by inhibiting the propagation of elastic wave energy (namely, forbidden band effect) in the specific vibration frequency range. At present, two elastic wave forbidden band generating mechanisms exist in a phonon crystal structure, namely Bragg scattering and local resonance, wherein the local resonance can realize the forbidden band effect of 'small-size control large wavelength', and the photonic crystal structure has good practicability for low-frequency vibration reduction and noise reduction, so that the photonic crystal structure is increasingly valued in the application of lattice structure design. Because the lattice structure is a hollow structure, the interface of a heat conduction path of the structure is reduced, so that the heat radiation capability of the structure is reduced, the heat radiation capability of the lattice structure is enhanced and the design is light, and no good solution is found in the prior art.
In the known embodiments in the art, chinese patent CN202010608028.9 discloses a novel three-dimensional chiral negative poisson ratio multicell energy absorbing structure, comprising a plurality of energy absorbing layers stacked in sequence, the energy absorbing layers comprising a plurality of hexagonal chiral structural unit cells, through stacking of micro structures, the elastic displacement of the structure before reaching the yield limit is improved, the initial impact force is absorbed by using larger displacement, and the energy absorbing structure has larger advantages for the absorption of concentrated, multiple and small-magnitude impact energy, but has weaker energy consumption and vibration reduction;
Chinese patent CN201811466741.3 discloses a lattice structure with vibration isolation characteristic, in which a unit cell is in a body-centered cubic structure, and a mass block is added at the body-centered position to form a vibrator structure, so that vibration suppression can be implemented in a lower frequency range, and the specific stiffness is higher, and the lattice structure can be used for vibration isolation facilities with bearing requirements, but the buffer performance of the lattice structure is general, 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 ratio in a large deformation state, the unit cell structure is composed of a straight line rod and a curved line rod, and the lattice structure is composed by three direction arrays in XYZ, which has the characteristics of light weight and high energy absorption, but relatively poor vibration reduction and specific stiffness;
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 two-dimensional periodically arranged unit cells, the unit cells comprise a pyramid-shaped sandwich structure base structure and cuboid-shaped stainless steel-nylon resonance units embedded in the base structure, the vibration damping is realized by mainly designing the periodically arranged resonance unit structure to generate a broadband band gap in a low-frequency range, and the low-frequency vibration damping light metamaterial lattice structure has a certain bearing capacity, but the manufacturing process of the structure is complex, and the thermal conductivity is poor.
The lattice structures disclosed in the above 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 technical problem to be solved by the invention is to provide a lattice structure which has heat transfer and energy absorption 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; compared with a solid structure, the lattice structure of the invention has light weight.
The invention solves the technical problems by adopting the following solution:
a lattice structure with heat transfer and energy absorption 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 inward bending pieces which are polygonal or circular arrays, connecting pieces which are used for connecting the end parts of two adjacent groups of inward bending pieces and form a cage structure, and two groups of supporting clamping pieces which are positioned in the cage structure and are respectively connected with the connecting pieces.
In the invention, the internal bending piece and the connecting piece in the single cell structure form a local resonance area, when vibration load acts, the mass vibrator-spring system formed in the local resonance area 200 can generate local resonance, a frequency forbidden band effect is generated, vibration energy in a required expected frequency band is greatly attenuated, and a vibration reduction effect is realized;
The invention forms a thermal path area at the connection part through the connection of a plurality of cell structures; when the heating source is arranged in a heat path area formed at the joint of the inner bending piece and the connecting piece, the rapid heat dissipation and transmission can be realized;
when impact load acts on the invention, the elastic rod system formed by the inner bending piece and the connecting piece elastically deforms, so that impact kinetic energy is converted into mechanical deformation potential energy, and impact energy absorption is realized.
In some possible embodiments, the device further comprises a mass located between and respectively connected to the two sets of support clamps.
In some possible embodiments, in order to provide a good damping effect for the inner bending piece;
the inner bending piece comprises an inner bending column I which is of an arc-shaped structure and is provided with an opening outwards, and an inner bending column II which is respectively connected with the two ends of the inner bending column I and is of an arc-shaped structure; the opening of the second inner bending column faces outwards; the included angle formed by the first inner bending column and the second inner bending column which are mutually connected at two ends is smaller than 90 degrees.
In some possible embodiments, in order to effectively cooperate with the inner bending piece, the rod system structure can generate enough deformation, can effectively absorb impact kinetic energy and convert the impact kinetic energy into mechanical deformation potential energy;
the connecting pieces comprise connecting components which are symmetrically arranged and are used for connecting the same side end parts of two adjacent groups of inner bending pieces;
The connecting component comprises a first bending rod which is connected with the end part of the same side of the adjacent inner bending piece and is in a V shape; 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, for effective fixation of the mounted mass within the cage structure;
The supporting 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; the two groups of supporting pieces are oppositely arranged and the planes of the two groups of supporting pieces are mutually perpendicular.
In some of the possible embodiments of the present invention,
The support piece comprises a bending rod III with a V-shaped structure and a short rod used for connecting the bending rod III with the bending rod I; the openings of the two groups of bending rods III 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, which are close to one side of each other, are connected with the corresponding bending rod I through a connecting rod.
In some of the possible embodiments of the present invention,
The support piece comprises two groups of round rods which are obliquely arranged and one end of each round rod is located in the cage structure, a short connecting rod used for connecting the round rods with the first bending rod, and a short rod II which is connected with the two groups of connecting pieces respectively and located in the cage structure.
In some of the possible embodiments of the present invention,
The connecting piece comprises an arc-shaped bent rod I which is obliquely arranged, and the two ends of the connecting piece are respectively connected with the top end and the bottom end of two adjacent groups of inner bent pieces;
The opening of the first arc-shaped bent rod is arranged at the outer side of the cage structure;
in some of the possible embodiments of the present invention,
The supporting clamping piece comprises a plurality of short rods III arranged on the inner side of the arc-shaped bent rod I.
In some of the possible embodiments of the present invention,
And a clamping cavity is formed between the two groups of supporting clamping pieces, and the lattice structure further comprises a mass block which is positioned between the two groups of supporting clamping pieces and is 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 supporting rigidities can be realized by changing the layout, the data quantity and the section size of the bending rods, the first inner bending column, the second bending column and the third bending column so as to meet the control requirements of different platform equipment on structural deformation;
According to the invention, a typical mass vibrator-spring structure is formed between the mass block and the bending rod I, the bending rod II and the bending rod III, a local resonance forbidden band effect can be generated in a vibration environment, vibration energy in a required expected frequency band can be greatly attenuated, the structural rigidity and the mass block of the vibration damping device are adjustable, and further the expected vibration damping frequency band is adjustable, so that the vibration damping device is suitable for vibration damping requirements of different equipment structures;
Compared with the traditional lattice structure, the heat conduction device can meet the heat conduction requirement of the heat generating point, lighten the adverse effect of structural hollowed-out on the heat transfer path as much as possible, and can meet the heat conduction design requirement of electronic equipment and the like.
The invention forms a complex modified negative poisson ratio structure, which not only has better supporting rigidity than the original negative poisson structure, but also can generate enough deformation of a rod system structure formed by a bending rod I, an inner bending column II, a bending rod II and a bending rod III of the lattice structure under the action of impact load, and absorbs impact kinetic energy like a spring to 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 environment adaptability of various electronic devices on platforms such as aviation, aerospace and the like.
Drawings
FIG. 1 is a schematic diagram of a cell structure in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the structure of the present invention;
FIG. 3 is a schematic diagram of a cell structure in embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of a cell structure in embodiment 3 of the present invention;
FIG. 5 is a schematic diagram of a cell structure in embodiment 4 of the present invention;
FIG. 6 is a schematic diagram of a cell structure in embodiment 5 of the present invention;
FIG. 7 is a schematic diagram of a cell structure in embodiment 6 of the present invention;
Wherein: 10. a cell structure; 1. an inner bending piece; 11. an inner bending column I; 12. an inward bending column II; 2. a connecting piece; 21. bending the first rod; 22. a short column I; 23. an arc-shaped bent rod I; 3. a support clamp; 31. bending the rod III; 32. a short bar; 33. clamping the cavity; 34. a connecting rod; 35. a round bar; 36. connecting short rods; 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 application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Reference to "first," "second," and similar terms herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, 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 the association relationship of the association object, which means that there may be three relationships, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" means two or more. For example, a plurality of positioning posts refers to two or more positioning posts. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The present invention will be described in detail below.
Example 1:
As shown in fig. 1 and 2:
A lattice structure with heat transfer and energy absorption 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 sets of inner bending members 1 in a hexagonal array, connecting members 2 for connecting ends of two adjacent sets of inner bending members 1 and forming a cage structure, two sets of supporting clamping members 3 located in the cage structure and respectively connected with the two sets of connecting members 2, and a mass block 4 located between the two sets of supporting clamping members 3 and respectively connected with the two sets of supporting 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 structure.
The hexagons may be quadrilateral, pentagonal, or circular in shape;
In some possible embodiments, the inner bending member 1 includes a first inner bending column 11 having an arc structure and having an opening facing outwards, and a second inner bending column 12 having two ends connected to two ends of the first inner bending column 11 and having an arc structure; the opening of the second inner bending column 12 faces outwards; the included angle formed by the first inner bending column 11 and the second inner bending column 12 with two ends connected with each other is 45 degrees. The opening described herein is directed outwardly to the side facing away from the cage.
Preferably, the included angle can be realized by an included angle degree of 30 degrees, 40 degrees and 50 degrees and 60 degrees.
In some possible embodiments, the connecting piece 2 comprises connecting components symmetrically arranged along the Z axis and used for connecting the same side ends of two adjacent groups of inner bending pieces 1; the connecting assembly comprises a first bending rod 21 which is connected with the end part on the same side of the adjacent inner bending piece 1 and is in a V shape, and a first short column 22 which is arranged at the bending position of the first bending rod 21 and is vertically arranged;
The free end of the first stub 22 is on the same plane as the end of the first bending bar 21 and the end of the inner bending member 1.
In some possible embodiments, the support clamp 3 comprises two sets of supports inside a cage structure connected to two sets of connection assemblies respectively; the two groups of supporting pieces are oppositely arranged and the planes of the two groups of supporting pieces are mutually perpendicular.
The support piece comprises a bending rod III 31 with a V-shaped structure and a short rod 32 for connecting the bending rod III 31 with the bending rod I21; the openings of the two groups of bending rods III 31 are oppositely arranged to form a clamping cavity 33.
As shown in fig. 1, a set of bending bars three 31 open downwards and are connected with the inner bending member 1 above the cage structure by a short bar 32;
the openings of the other group of bending rods III 31 are upward, and the inner bending pieces 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 a support short column which is 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 between the mass block 4 and the first bending rod 21, the first inner bending column 11, the second inner bending column 12 and the third bending rod 31, and in a vibration environment, a local resonance forbidden band effect can be generated, so that vibration energy in a required expected frequency band can be greatly attenuated; meanwhile, the structural rigidity and the mass block 4 of the invention are adjustable, so that the expected vibration reduction frequency band can be adjusted, and the invention is suitable for vibration reduction 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 region 100 is formed at the connection position, so that the heat conduction requirement of the heat generating point can be met, the rapid heat dissipation and transfer can be realized, the adverse effect of the structural hollow on the heat transfer path can be reduced as much as possible, and the heat conduction design requirement of electronic equipment and the like can be met.
In this embodiment, the rod system structure formed by the first bending rod 21, the first inner bending rod 11, the second inner bending rod 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 impact load, absorb impact kinetic energy like a spring and convert the impact kinetic energy into mechanical deformation potential energy.
In the invention, the inner bending piece 1 and the connecting piece 2 are realized by adopting bending pieces, and the connecting pieces mainly act on the bent parts and have good elastic deformation; therefore, when the impact energy absorber 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:
This embodiment differs from embodiment 1 in that the mass 4 is not disposed in the clamping cavity 33 formed by the two sets of support clamps 3;
In the lattice unit with low vibration reduction requirement, the embodiment constructs a lattice structure with heat transfer and energy absorption characteristics.
Example 3:
As shown in fig. 4:
compared with the embodiment 1, in the present embodiment, four 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 compositions, installation and connection relations are the same as those of the embodiment 1, a new cell structure 10 is formed, and a lattice structure with better supporting rigidity and heat dissipation, energy absorption and vibration reduction characteristics is constructed by copying 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 round bars 35 disposed obliquely and having one end located in the cage structure, a connecting short bar 36 for connecting the round bars 35 with the first bending bar 21, and a short bar two 37 connected with the two sets of connecting members 2 respectively and located in the cage structure.
The supporting piece is not in a V-shaped structure any more, the short rods II 37 are directly arranged at the central parts of the first bending rods 21 which are not on the same plane, the short rods II 37 are obliquely arranged, the free ends of the short rods II are positioned in the cage structure, the two groups of short rods II 37 are adopted to support the upper side and the lower side of the mass block 4, the round rods 35 are connected with the central parts of the third bending rods 31 through the connecting short rods 36 and positioned in the cage structure, and the round rods 35 are connected with the third bending rods 31 which are not connected with the round rods 37;
Depending on the requirements of use, the second short bar 37 may be arranged symmetrically or asymmetrically, depending on whether or not the asymmetry of the lattice structure is considered;
As shown in fig. 5, in the one set of the connectors 2, after the second short bar 37 is connected to the third bending bar 31, the round bar 35 connects the bending bars 31 opposed to the bending bars 31 via the short bar 36. The round bar 36 and the short bar 37 are both obliquely arranged and in the cage structure, and the short bar 36 and the short bar 37 connected with the connecting piece 2 on the same side in fig. 5 are arranged in parallel.
By replicating the array of cell structures 10, a lattice structure is constructed that has less supporting rigidity and combines heat dissipation and energy absorption and vibration reduction properties.
When the present embodiment employs 3D additive manufacturing, the support structure will be added; and will not be described in detail herein.
Example 5:
As shown in fig. 6 and 7:
This embodiment differs from embodiment 1 in that:
The connecting piece 2 comprises an arc-shaped bent rod I23 which is obliquely arranged, and the two ends of the connecting piece are respectively connected with the top end and the bottom end of the adjacent two groups of inner bent pieces 1; the opening of the arc-shaped bent rod I23 is arranged on the outer side of the cage structure; the support clamp 3 comprises a plurality of short bars three 38 arranged inside the arc-shaped bent bar one 23.
In the embodiment, the structure of the connecting piece 2 and the connection relation between the connecting piece 2 and the inner bending piece 1 are changed, and the supporting clamping piece 3 adopts a short rod III 38 arranged on the inner side of the connecting piece 2 to realize the supporting of the mass block 4;
The connecting piece 2 adopts an arc-shaped bent rod I23 and is obliquely arranged, and an opening is outwards arranged at one side far away from the cage structure; two ends of each arc-shaped bent rod I23 are respectively connected with the top end of one group of inner bent pieces 1 in two adjacent groups and the bottom end of the other group of inner bent pieces 1, and the inner bent pieces 1 with the bottom ends connected by the arc-shaped bent rods I23 are connected with the top ends of the other groups of inner bent pieces 1 when connected with the other groups of inner bent pieces 1 through the other groups of arc-shaped bent rods I23; forming a cage structure formed by connecting the bottom ends and the top ends of all the inner bending pieces 1;
the third short rod 38 is arranged at the center of the first arc-shaped bent rod 23 and is positioned inside the cage structure and used for supporting the mass block 4;
When 3D additive manufacturing is used, an arc-shaped curved post will be printed on the arc-shaped curved rod one 23 for efficient manufacturing;
the arc bending columns can be one or two arc structures which are arranged along the length direction of the inner bending piece 1 and are connected with the center part of the arc bending rod I23, and the openings of the arc bending columns are arranged on one side close to the cage structure; the arc-shaped bent column and the arc-shaped bent rod one 23 are arranged in a crisscross manner.
Of course, two arc-shaped columns which are uniformly arranged along the three directions of the arc-shaped bent rod and are opposite in super direction can also be adopted for realizing the method as shown in fig. 7; the curved corner posts are mainly used for support in 3D additive manufacturing and will not be described in any greater detail here.
In the present invention, the mass 4 may be set or not according to the use requirement, but it is mainly determined by whether the present invention has a high vibration reduction requirement in use.
The lattice can adopt a single cell structure 10, can adopt a single-layer arrangement and be formed by connecting a plurality of cell structures 10, and can also be realized by adopting a multi-layer structure which is arranged in a stacked manner; in particular according to the requirements of use.
When the cell structures 10 are stacked and arranged in multiple layers, and each layer is a plurality of cell structures 10, the inner bent pieces 1 of the adjacent lattice cell structures 10 are connected to form a heat transfer path area 100; as shown in fig. 1, a cage structure which is approximately hexahedral is formed by matching four groups of connecting pieces 2 and an inward bending piece 1 on an XY plane; the first short column 22 is arranged in parallel with the Z axis at a bending position in the middle of the first bending rod 21, and forms an approximate negative Poisson 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 clamping piece 3 and the mass block 4 jointly form a plurality of local resonance areas 200 in the lattice structure, and finally, the lattice structure with heat transfer and energy absorption and vibration reduction characteristics is formed.
If the heating source is arranged in the heat path area, the rapid heat dissipation and transmission can be realized;
when vibration load acts on the lattice structure, the mass vibrator-spring system of the local resonance region 200200 can generate local resonance, so that a frequency forbidden band effect is generated, and a vibration reduction effect is realized.
When impact load acts on the lattice structure, an elastic rod system 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 is elastically deformed, so that 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 by the invention.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (6)
1. The lattice structure with heat transfer and energy absorption 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 comprises a plurality of groups of inward bending pieces which are in a polygonal or circular array, connecting pieces which are used for connecting the end parts of two adjacent groups of inward bending pieces and form a cage structure, and two groups of supporting clamping pieces which are positioned in the cage structure and are respectively connected with the connecting pieces;
the lattice structure also comprises a mass block which is positioned between the two groups of supporting clamping pieces and is respectively connected with the two groups of supporting clamping pieces;
The inner bending piece comprises an inner bending column I which is of an arc-shaped structure and is provided with an opening outwards, and an inner bending column II which is respectively connected with the two ends of the inner bending column I and is of an arc-shaped structure;
the opening of the second inner bending column faces outwards; the included angle formed by the first inner bending column and the second inner bending column which are mutually connected at two ends is smaller than 90 degrees;
the connecting pieces comprise connecting components which are symmetrically arranged and are used for connecting the same side end parts of two adjacent groups of inner bending pieces;
the connecting component comprises a first bending rod which is connected with the end part of the same side of the adjacent inner bending piece and is in a V shape; 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;
the supporting 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; the two groups of supporting pieces are oppositely arranged, and the planes of the two groups of supporting pieces are mutually perpendicular;
The support piece comprises a bending rod III with a V-shaped structure and a short rod I for connecting the bending rod III with the bending rod I; the openings of the two groups of bending rods III are arranged in opposite directions.
2. The lattice structure with heat transfer and energy absorption vibration reduction characteristics according to claim 1, wherein free ends of one side, close to each other, of the two bending rods are connected with the corresponding bending rod one through a connecting rod.
3. The lattice structure of claim 1, wherein the support member comprises two groups of round bars arranged in an inclined manner and having one end located in the cage structure, a connecting short bar for connecting the round bars with the first bending bar, and a short bar two groups of connecting members respectively connected with the two groups of connecting members and located in the cage structure.
4. The lattice structure with heat transfer and energy absorption vibration reduction characteristics according to claim 1, wherein the connecting piece comprises an arc-shaped bent rod I, wherein the two ends of the connecting piece are obliquely arranged, and the top end and the bottom end of each two adjacent groups of inner bent pieces are respectively connected with the arc-shaped bent rod I;
The opening of the arc-shaped bent rod I is arranged on the outer side of the cage structure.
5. The lattice structure of claim 4, wherein the support and clamping member comprises a plurality of short rods three disposed inside an arc-shaped bent rod.
6. A lattice structure according to any one of claims 1-5, wherein a clamping cavity is formed between two sets of support clamping members.
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