Ship vibration reduction structure

Abstract

The present application relates to the technical field of damping device, and provides a ship damping structure, which comprises a plurality of lattice units, each of which comprises a polyhedral lattice structure and an internal lattice structure; the internal lattice structure is arranged in the interior of the polyhedral lattice structure and is connected with each vertex of the polyhedral lattice structure respectively; the lattice unit is isotropic; and the plurality of lattice units are arranged in an array and are connected with each other. The ship damping structure of the present application is composed of a plurality of lattice units connected with each other, each of which is composed of a polyhedral lattice structure and an internal lattice structure in the interior of the polyhedral lattice structure. By reasonably designing the structures of the polyhedral lattice structure and the internal lattice structure, the lattice unit can be isotropic. The plurality of lattice units are arranged in an array and are connected with each other, so that an isotropic ship damping structure can be formed. When the ship damping structure bears vibration impact, the damping performance of the ship damping structure in each direction is basically consistent or similar, and the damping effect is better.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction equipment technology, and more particularly to a ship vibration reduction structure. Background Technology

[0002] As a spatial structure designed for lightweight and high-strength applications, lattice structures have been widely used in the design of load-bearing structural components. However, traditional lattice structures exhibit differences in mechanical properties in different directions, resulting in poor vibration reduction when subjected to vibrations in different directions. Summary of the Invention

[0003] This invention provides a ship vibration reduction structure to solve the problem that the existing dot-matrix ship vibration reduction structure has poor vibration reduction effect when facing vibrations in different directions.

[0004] This invention provides a ship vibration reduction structure, comprising: Multiple lattice units, each lattice unit comprising: a polyhedral lattice structure and an internal lattice structure; the internal lattice structure is disposed inside the polyhedral lattice structure and is connected to each vertex of the polyhedral lattice structure respectively; the lattice units are isotropic; the multiple lattice units are arranged in an array and interconnected with each other.

[0005] According to the ship vibration reduction structure of the present invention, the polyhedral lattice structure includes: a plurality of first connecting rods, the plurality of first connecting rods extending along the edges of the polyhedron and connected to each other to form the polyhedral lattice structure; The internal lattice structure includes a plurality of second connecting rods, wherein any two vertices of the polyhedral lattice structure are connected by a second connecting rod.

[0006] According to the ship vibration reduction structure of the present invention, one of the first connecting rod and the second connecting rod is a solid rod and the other is a hollow rod, wherein the diameter of the solid rod and the outer diameter of the hollow rod are equal.

[0007] According to the ship vibration reduction structure of the present invention, the polyhedral lattice structure is an octahedral structure; the internal lattice structure includes three second connecting rods arranged in a one-to-one correspondence with the diagonals of the octahedral structure, and the second connecting rods extend along the corresponding diagonals.

[0008] According to the ship vibration reduction structure of the present invention, the centers of gravity of the polyhedral lattice structure and the internal lattice structure coincide.

[0009] According to the ship vibration reduction structure of the present invention, the middle parts of any two second connecting rods are perpendicularly connected to each other.

[0010] According to the ship vibration reduction structure of the present invention, the polyhedral lattice structure is a regular octahedral structure.

[0011] The ship vibration reduction structure according to the present invention includes: the first connecting rod and the second connecting rod are metal connecting rods.

[0012] According to the ship vibration reduction structure of the present invention, multiple lattice units are arranged in a matrix.

[0013] The ship vibration damping structure according to the present invention further includes a polymer material filler, which fills the gaps between the lattice units.

[0014] The ship vibration reduction structure of the present invention is composed of multiple interconnected lattice units. Each lattice unit is composed of a polyhedral lattice structure and an internal lattice structure connected within the polyhedral lattice structure. By rationally designing the polyhedral lattice structure and the internal lattice structure, the lattice units can be made isotropic. Multiple lattice units are arranged in an array and interconnected to form an isotropic ship vibration reduction structure. When subjected to vibration impact, the vibration reduction performance of the ship vibration reduction structure of the present invention remains basically consistent or similar in all directions. It has a better vibration reduction effect when facing vibration impact from different directions, effectively solving the problem that the existing lattice-shaped ship vibration reduction structure has poor vibration reduction effect when facing vibration from different directions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a ship vibration reduction structure provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of a lattice unit provided in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the polyhedral lattice structure provided in an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the internal dot matrix structure provided in an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of a lattice unit provided in another embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of a polyhedral lattice structure provided in another embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the internal dot matrix structure provided in another embodiment of the present invention.

[0023] Figure label: 1. Ship vibration reduction structure; 11. Crystal unit; 111. Polyhedral lattice structure; 1111. First connecting rod; 112. Internal dot matrix structure; 1121. Second connecting rod. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] The following is combined with Figures 1-7 The present invention describes a ship vibration reduction structure.

[0026] like Figures 1 to 7 As shown, the present invention provides a ship vibration reduction structure 1, comprising: a plurality of lattice units 11, each lattice unit 11 comprising: a polyhedral lattice structure 111 and an internal lattice structure 112; the internal lattice structure 112 is disposed inside the polyhedral lattice structure 111 and is connected to each vertex of the polyhedral lattice structure 111 respectively; the lattice units 11 are isotropic; the plurality of lattice units 11 are arranged in an array and interconnected with each other.

[0027] The ship vibration damping structure 1 of this embodiment can be applied to any mechanical equipment that requires vibration damping and isolation. The ship vibration damping structure 1 of this embodiment is composed of multiple lattice units 11 arranged in an array and interconnected. Each lattice unit 11 consists of a polyhedral lattice structure 111 and an internal lattice structure 112. It can be understood that the polyhedral lattice structure 111 is a frame structure with a polyhedral shape as a whole. There is a certain space inside the frame. The internal lattice structure 112 is located inside the polyhedral lattice structure 111 and is connected to each vertex of the polyhedral lattice structure 111. It can be understood that by reasonably designing the structural parameters of the polyhedral lattice structure 111 and the internal lattice structure 112, the mechanical properties of the entire lattice unit 11 can be adjusted so that the lattice unit 11 is isotropic. Multiple isotropic lattice units 11 can form an isotropic ship vibration damping structure 1 by reasonably arranging them in an array and interconnecting them. When subjected to vibration impacts from different directions, the isotropic ship vibration reduction structure 1 can maintain a consistent vibration reduction effect in all directions, resulting in a better vibration reduction effect.

[0028] The ship vibration reduction structure 1 of the present invention is composed of multiple interconnected lattice units 11. Each lattice unit 11 is composed of a polyhedral lattice structure 111 and an internal lattice structure 112 connected within the polyhedral lattice structure 111. By rationally designing the structure of the polyhedral lattice structure 111 and the internal lattice structure 112, the lattice units 11 can be made isotropic. Multiple lattice units 11 are arranged in an array and interconnected to form an isotropic ship vibration reduction structure 1. When subjected to vibration impact, the vibration reduction performance of the ship vibration reduction structure 1 of the present invention remains basically consistent or similar in all directions. It has a better vibration reduction effect when facing vibration impact from different directions, effectively solving the problem that the existing lattice-shaped ship vibration reduction structure has poor vibration reduction effect when facing vibration from different directions.

[0029] Specifically, in some embodiments, such as Figures 2 to 7 As shown, the polyhedral lattice structure 111 includes: a plurality of first connecting rods 1111, which extend along the edges of the polyhedron and are connected to each other to form the polyhedral lattice structure 111; the internal lattice structure 112 includes: a plurality of second connecting rods 1121, which connect any two vertices of the polyhedral lattice structure 111 through a second connecting rod 1121.

[0030] In this embodiment, the polyhedral lattice structure 111 is formed by interconnecting multiple first connecting rods 1111. Specifically, the first connecting rods 1111 are correspondingly arranged with the edges of the polyhedron. The first connecting rods 1111 extend along the corresponding edges and extend to the endpoints of the edges (i.e., the vertices of the polyhedron), connecting with another first connecting rod 1111. This forms a polyhedral lattice structure 111 with solid structures only at the edges and endpoints. Meanwhile, two vertices of the polyhedral lattice structure 111 that are not connected by the first connecting rods 1111 are connected by second connecting rods 1121 to form an internal lattice structure 112 inside the polyhedral lattice structure 111, thereby strengthening the mechanical strength of the entire lattice unit 11. At the same time, this lattice-like structure is lighter and has a better performance.

[0031] Furthermore, in some embodiments, one of the first connecting rod 1111 and the second connecting rod 1121 is a solid rod and the other is a hollow rod, with the diameter of the solid rod and the outer diameter of the hollow rod being equal.

[0032] In this embodiment, both the first connecting rod 1111 and the second connecting rod 1121 are cylindrical structural components. By designing the first connecting rod 1111 and the second connecting rod 1121 as solid and hollow rods respectively, and ensuring that the diameter of the solid rod and the outer diameter of the hollow rod are equal, the diameter (outer diameter) of each rod constituting the lattice unit 11 remains consistent. This avoids stress concentration at the connection points of rods with different diameters (outer diameters) under load, thereby further enhancing the overall load-bearing capacity of the lattice unit 11. Furthermore, by rationally designing the ratio of the inner diameter to the outer diameter of the hollow rod, the lattice unit 11 can be made isotropic overall.

[0033] Specifically, by adjusting the inner diameter of the hollow rod... d i With outer diameter d o The ratio γ controls the anisotropy of the structure. The anisotropy factor of the lattice structure can be calculated using the stiffness matrix of the periodic boundary conditions. Finally, an isotropic structure with a Zener anisotropy factor of 1 is designed.

[0034] Adjusting the inner diameter of hollow rods d i With outer diameter d o The ratio γ, by applying periodic strain boundary conditions, yields stiffness matrices with different parameters, as follows: The anisotropy factor of the structure is calculated using the following formula. : Optionally, such as Figure 2 , Figure 3 and Figure 4 As shown, the first connecting rod 1111 is a hollow rod, and correspondingly, the second connecting rod 1121 is a solid rod; or, as... Figure 5 , Figure 6 and Figure 7 As shown, the first connecting rod 1111 is a solid rod, and correspondingly, the second connecting rod 1121 is a hollow rod.

[0035] In some specific embodiments, such as Figure 2 and Figure 5 As shown, the polyhedral lattice structure 111 is an octahedral structure; the internal lattice structure 112 includes three second connecting rods 1121 that correspond one-to-one with the diagonals of the octahedral structure, and the second connecting rods 1121 extend along the corresponding diagonals.

[0036] In this embodiment, the polyhedral lattice structure 111 is an octahedral structure formed by twelve first connecting rods 1111 interconnected with each other. The octahedral structure has three diagonals, and three second connecting rods 1121 extend along the three diagonals respectively to connect the vertices at both ends of the diagonals, thereby strengthening the overall mechanical strength of the lattice unit 11.

[0037] Furthermore, in some embodiments, such as Figure 2 and Figure 5 As shown, the center of gravity of the polyhedral lattice structure 111 and the center of gravity of the internal lattice structure 112 coincide. In this embodiment, by reasonably setting the shape and structure of the polyhedral lattice structure 111 and the internal lattice structure 112, the center of gravity of the polyhedral lattice structure 111 and the center of gravity of the internal lattice structure 112 can be made to coincide, thereby further strengthening the overall connection strength and mechanical load-bearing capacity of the polyhedral lattice structure 111 and the internal lattice structure 112.

[0038] Furthermore, in some embodiments, such as Figures 2 to 7 As shown, the middle parts of any two second connecting rods 1121 are perpendicularly connected to each other.

[0039] In this embodiment, by reasonably setting the shape of the octahedron corresponding to the polyhedral lattice structure 111, any two diagonals of the octahedron can intersect perpendicularly, thereby enabling the middle parts of the second connecting rods 1121 extending along the diagonals to be perpendicularly connected to each other, thus enabling multiple second connecting rods 1121 to form a whole with better mechanical properties and structural strength, and to be connected and cooperated with the polyhedral lattice structure 111 to form a lattice unit 11 with better mechanical properties.

[0040] Specifically, in some embodiments, the polyhedral lattice structure 111 is a regular octahedral structure. In this embodiment, the polyhedral lattice structure 111 is a regular octahedral structure formed by connecting twelve first connecting rods 1111 of the same length. The three diagonals of the regular octahedron are of the same length, perpendicular to each other, and intersect at the same point. The intersection point coincides with the center of gravity of the entire polyhedral lattice structure 111. Correspondingly, the internal lattice structure 112 formed by three second connecting rods 1121 also has a cross-shaped structure. The three second connecting rods 1121 are perpendicular to each other and intersect at the same position, so that the centers of gravity of the polyhedral lattice structure 111 and the internal lattice structure 112 coincide with each other. Under stress, the primary deformation tendency of the octahedral structure is tensile deformation, resulting in better compressive strength, impact resistance, load-bearing capacity, and vibration damping effect. Simultaneously, under compression, the stress concentration point of the octahedral frame is the center of the first connecting rod 1111, which is inclined relative to the direction of force. The cross-shaped internal lattice structure 112 within the octahedral frame can delay the fracture strain of the first connecting rod 1111 during compression, thus giving the entire lattice unit 11 better mechanical compressive strength. The overall octahedral lattice unit 11, combined with the structural dimensions of the first connecting rod 1111 and the second connecting rod 1121 in the aforementioned embodiment, is more conducive to achieving isotropic mechanical properties of the lattice unit 11.

[0041] Specifically, when designing the lattice unit 11, a unit cell cube of length *a* can be used as the design basis. The unit cell cube has six square faces, each square face having a face center. Each first connecting rod 1111 is connected to the face center of one of the square faces and the face center of the face adjacent to that positive face, thereby forming a regular octahedral frame. The length of each first connecting rod 1111 is... The internal lattice structure 112 includes three second connecting rods 1121 of length a, each second connecting rod 1121 being connected to the center of two opposite square faces to form a cross-shaped internal lattice structure 112.

[0042] It is understood that in this embodiment, both the first connecting rod 1111 and the second connecting rod 1121 can be microtubes with extremely small dimensions; the first connecting rod 1111 and the second connecting rod 1121 can be metal connecting rods, which are lightweight, high-strength, and have good vibration reduction effect.

[0043] To ensure the isotropic nature of the ship's vibration damping structure 1 as a whole, the lattice units 11 can be arranged in a periodic array along the Cartesian coordinate system to form an isotropic overall structure.

[0044] Specifically, in some embodiments, such as Figure 1 As shown, multiple lattice units 11 are arranged in a matrix.

[0045] In one specific embodiment, the ship vibration reduction structure 1 includes multiple layers of lattice units 11; each layer of lattice units 11 includes multiple rows of lattice units 11; each row of lattice units 11 includes multiple lattice units 11 arranged along a first horizontal direction; the multiple rows of lattice units 11 in each layer of lattice units 11 are arranged along a second horizontal direction; the multiple layers of lattice units 11 are arranged in a vertical direction. The first horizontal direction and the second horizontal direction are perpendicular to each other.

[0046] In this embodiment, multiple lattice units 11 in each row are arranged along a first horizontal direction, and the multiple lattice units 11 form a linear single-row structure; each layer of lattice units 11 includes multiple such single-row structures, and the multiple single-row structures are arranged along a second horizontal direction perpendicular to the first horizontal direction, thereby forming a square single-layer structure, and the multiple single-layer structures are arranged along the vertical direction, thereby forming a ship vibration reduction structure 1 in the form of a cuboid matrix.

[0047] Each lattice unit 11 includes an octahedral polyhedral lattice structure 111 and a cross-shaped internal lattice structure 112. The internal lattice structure 112 includes three mutually perpendicularly intersecting second connecting rods 1121, which extend along the length, width, and height directions of the matrix-type ship vibration damping structure 1, respectively. Each vertex of the polyhedral lattice structure 111 is connected to an adjacent polyhedral lattice structure 111. Furthermore, adjacent lattice units 11 contain the same number of lattice units 11, and are arranged in a one-to-one correspondence. In adjacent sets of lattice units 11, corresponding lattice units 11 are interconnected.

[0048] In some embodiments, the ship vibration damping structure 1 further includes a polymer material filler that fills the gaps in the lattice units 11.

[0049] In this embodiment, since the lattice unit 11 is usually a lattice-like framework structure, there are a large number of gaps inside and between the lattice units 11. In this embodiment, polymer materials are filled into the gaps of the lattice units 11. Polymer materials generally have viscoelasticity, that is, they exhibit both elastic and viscous characteristics when subjected to force. This characteristic allows them to absorb and dissipate vibration energy during vibration, which can work with the lattice unit 11 to enhance the overall vibration reduction performance of the ship vibration reduction structure 1. At the same time, polymer materials are usually low in density and light in weight, which helps to reduce the overall mass of the ship vibration reduction structure 1.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ship vibration reduction structure, characterized in that, include: Multiple lattice units, each lattice unit comprising: a polyhedral lattice structure and an internal lattice structure; the internal lattice structure is disposed inside the polyhedral lattice structure and is connected to each vertex of the polyhedral lattice structure respectively; the lattice units are isotropic; the multiple lattice units are arranged in an array and interconnected with each other; The polyhedral lattice structure includes: a plurality of first connecting rods, which extend along the edges of the polyhedron and are connected to each other to form the polyhedral lattice structure; The internal dot matrix structure includes: a plurality of second connecting rods, wherein any two vertices of the polyhedral dot matrix structure are connected by a second connecting rod. One of the first connecting rod and the second connecting rod is a solid rod, and the other is a hollow rod. The diameter of the solid rod and the outer diameter of the hollow rod are equal. The polyhedral lattice structure is an octahedral structure; the internal lattice structure includes three second connecting rods that correspond one-to-one with the diagonals of the octahedral structure, and the second connecting rods extend along the corresponding diagonals.

2. The ship vibration reduction structure according to claim 1, characterized in that, The centers of gravity of the polyhedral lattice structure and the internal lattice structure coincide.

3. The ship vibration reduction structure according to claim 2, characterized in that, The middle sections of any two of the second connecting rods are perpendicularly connected to each other.

4. The ship vibration reduction structure according to any one of claims 1-3, characterized in that, The polyhedral lattice structure is a regular octahedral structure.

5. The ship vibration reduction structure according to claim 4, characterized in that, The first connecting rod and the second connecting rod are metal connecting rods.

6. The ship vibration reduction structure according to claim 1, characterized in that, Multiple lattice units are arranged in a matrix.

7. The ship vibration reduction structure according to claim 1, characterized in that, It also includes a polymer material filler that fills the gaps between the lattice units.

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