A ship side protection structure based on chiral superstructure

Abstract

The application discloses a ship side protection structure based on chiral superstructure, which comprises, from outside to inside, an outer plate, a connecting layer, a chiral structure protection layer and an inner plate, and the outer plate and the chiral structure protection layer are bonded through the connecting layer; the chiral structure protection layer comprises a plurality of chiral superstructure cells and filling material arranged in an array, the filling material is filled in the gap of the chiral structure; and each chiral superstructure cell is composed of a chiral superstructure cell wing. The chiral superstructure material is designed, the unique mechanical properties and wave characteristics are utilized, the protection capability of the ship side is remarkably improved, external attacks can be effectively resisted, and the light weight and flexibility of the ship can be maintained.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ship protection, and particularly relates to a ship side protection structure based on a chiral superstructure. BACKGROUND

[0002] With the complication of marine environment, ships are facing increasing threats, especially in the side area, which is vulnerable to underwater explosions, attacks and other forms of threats. Traditional ship protection structures mostly use heavy metal materials, which can provide certain protection effect, but also increase the weight of the ship, affecting its mobility and speed. Therefore, a new type of protection structure is urgently needed, which can effectively resist external attacks and maintain the lightness and flexibility of the ship. SUMMARY

[0003] The purpose of the present application is to provide a ship side protection structure based on a chiral superstructure, which utilizes the unique mechanical properties and wave characteristics of the chiral superstructure, has the advantages of light weight, good energy absorption and resistance to continuous impact, and improves the protection capability of the ship side.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] A chiral superstructure cell wing is stacked by a plan view graph, which is composed of a closed graph of a rectangle and an inner recessed graph, the inner recessed graph is composed of a first side t, a third circular arc r3, a second circular arc r2, a third side, a first circular arc r1, a fourth circular arc r4 and a second side connected in order, wherein the first side l1 is attached to one side of the short side of the rectangle, one end of the second side is connected to the long side of the same side of the rectangle, the first circular arc r1 and the second circular arc r2 have the same center O1, the third circular arc and the fourth circular arc have the same center O, and the centers O1 and O are located on both sides of the inner recessed graph.

[0006] The length of the short side of the rectangle t, the length of the long side of the rectangle l1 and the radius of the fourth circular arc r4 satisfy: r4 = l1 + t;

[0007] The length of the short side of the rectangle t, the length of the long side of the rectangle l1 and the radius of the third circular arc r3 satisfy:

[0008] The central angle of the third circular arc r3 and the fourth circular arc r4 is 25 to 45 degrees, the central angle of the first circular arc r1 and the second circular arc r2 is 90 degrees, and r4-r3 = r2-r1;

[0009] The length of the short side of the rectangle t is the thickness of the chiral superstructure cell wing;

[0010] The length d of the chiral superstructure cell wing is d = r3 + r2.

[0011] Further, the chiral superstructure cell wing is rotated by 45 degrees around point O and replicated three times to splice a chiral superstructure cell, which is a cross shape; the side length C of the chiral superstructure cell is, wherein C is the side length of the chiral superstructure cell.

[0012] Further, the chiral superstructure cell is arranged in a symmetrical array to form a chiral structure protective layer, and a filler is filled in the gap; the symmetrical array is a plurality of rows, each two adjacent chiral superstructure cells are symmetrical structures, and each interval row of chiral superstructure cells is in parallel relationship; the adjacent chiral superstructure cells are connected to each other through the third edge of the chiral superstructure cell wing.

[0013] Further, the ship side protection structure of the chiral superstructure is provided with an outer plate, a connecting layer, a chiral structure protective layer and an inner plate from outside to inside, and the outer plate and the chiral structure protective layer are bonded through the connecting layer.

[0014] Further, the wing is made of carbon fiber 3D printing.

[0015] Further, the filler is polyurethane foam, and the density is less than 1 g / cm3.

[0016] The beneficial effects of the present application are:

[0017] 1. The protection effect is significantly improved: by introducing chiral superstructure and multi-layer design, the external shock wave is effectively dispersed and absorbed, and the protection ability of the ship side is improved.

[0018] 2. Weight reduction: the use of high-strength and lightweight composite materials reduces the overall weight of the ship and improves the maneuverability.

[0019] 3. Strong adaptability: the design of chiral superstructure enables the present application to adapt to different directions and intensities of impact, providing all-round protection; at the same time, by adjusting the parameters of chiral superstructure, customized design can be made for different threats, improving the adaptability of the protective structure.

[0020] 4. Easy to maintain and repair: due to the use of modular design, each layer is relatively independent, so when damaged, it can be conveniently replaced or repaired, reducing maintenance cost and time. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an overall schematic view of the ship side protection structure based on chiral superstructure.

[0022] Figure 2 It is a front view of the ship side protection structure based on chiral superstructure.

[0023] Figure 3 Fig. 1 is a schematic diagram of a chiral superstructure cell and a chiral superstructure cell wing structure;

[0024] Figure 4 Fig. 2 is a schematic diagram of a chiral superstructure cell wing parameter relationship. DETAILED DESCRIPTION

[0025] The application will be further described below with reference to the accompanying drawings.

[0026] As shown in Figure 1 the present embodiment, a chiral superstructure ship side protection structure is provided, which is provided with, from outside to inside, an outer plate 1, a connecting layer 2, a chiral structure protection layer 3, and an inner plate 4, and the outer plate 1 and the chiral structure protection layer 3 are bonded through the connecting layer 2; the chiral structure protection layer 3 comprises a plurality of chiral superstructure cells 31 arranged in an array and a filler, the filler is filled at the gap of the chiral structure; and each chiral superstructure cell 31 is composed of a chiral superstructure cell wing 311.

[0027] As shown in Figure 2 , the chiral structure protection layer 3 is composed of Figure 3 chiral superstructure cells 31 arranged in a symmetrical array. The symmetrical array of chiral superstructure cells 31 is divided into multiple rows, and each two adjacent unit structures are symmetrical structures.

[0028] Specifically, each row is composed of four symmetrical arrays of chiral superstructure cells, all chiral superstructure cells in the first row are in a symmetrical relationship with all chiral superstructure cells in the second row, similarly, all chiral superstructure cells in the second row are in a symmetrical relationship with all chiral superstructure cells in the third row, therefore, the chiral superstructure cells in the first row and the third row are in a parallel relationship, and the chiral superstructure cells in the second row and the fourth row are in a parallel relationship. The number of chiral superstructure cell structures in each row in the drawing is four, which only serves to illustrate briefly and does not serve as a limitation, and can be changed according to actual use.

[0029] As shown in Figure 3 and 4 , the chiral superstructure cell wing structure is drawn with two circular arcs (inner circular arcs r1 and r3 and outer circular arcs r2 and r4) with the center points of the two circular arcs in clockwise and counterclockwise directions respectively, then the two circular arcs are overlapped on the line segment connecting the two centers, forming a concave structure, and then the short side length l1 and the long side length l2 are connected with the circular arcs to form a chiral superstructure cell wing structure with both chiral and concave characteristics, and finally the chiral superstructure cell wing is rotated by 45° around point O and replicated three times to obtain a chiral superstructure cell 31.

[0030] As shown in Figure 3As shown, the chiral superstructure cell wing 311 is formed by stacking top-view plane figures, and the top-view plane figure is a closed figure composed of a rectangle and a concave figure, and the concave figure is composed of a first side t, a third arc r3, a second arc r2, a third side, a first arc r1, a fourth arc r4, and a second side connected end to end, wherein the first side l1 is in contact with the short side of one side of the rectangle, and one end of the second side is connected to the long side of the same side of the rectangle, the first arc r1 and the second arc r2 are concentric with the center O1, the third arc and the fourth arc are concentric with the center O, and the center O1 and the center O are respectively located on both sides of the concave figure.

[0031] The deflection angle of the chiral superstructure cell wing 311 is defined as α, and the deflection angle of the chiral superstructure cell wing 311 can vary from 25 degrees to 45 degrees;

[0032] The length of the short side of the rectangle t, the length of the long side of the rectangle l1, and the radius r4 of the fourth arc satisfy: r4 = l1 + t;

[0033] The length of the short side t of the rectangle, the length of the long side l1 of the rectangle, and the radius r3 of the third arc satisfy:

[0034] The central angles of the third arc r3 and the fourth arc r4 are 25 to 45 degrees, the central angles of the first arc r1 and the second arc r2 are 90 degrees, and r4-r3=r2-r1;

[0035] The length t of the short side of the rectangle is the thickness of the chiral superstructure cell wing 311;

[0036] The length d of the chiral superstructure cell wing 311 is d=r3+r2.

[0037] The chiral superstructure cell wing 311 is rotated 45 degrees around point O and replicated three times to obtain a chiral superstructure cell 31. The chiral superstructure cell 331 is in the shape of a cross. The side length C of the chiral superstructure cell 31 is, Where C is the side length of the chiral superstructure cell 31.

[0038] Specifically, the size of the chiral superstructure cell structure is 64mm×64mm, the overall shape of the cell structure is square, the thickness of the chiral cell wing is 0<t≤8mm, and the length of the outer arc radius of the chiral cell wing is 0<r2≤6mm.

[0039] The principle of the negative Poisson's ratio effect presented by the chiral superstructure cell is that the rotation of the wing around the center point in the stretching process drives the rotation of the connected rod to produce a rotating contraction, and extrudes the concave structure to continue to stretch and contract, the contraction of the cell spreads to the overall structure, so that the overall structure produces a macroscopic contraction effect under the static stretching action; Unlike traditional chiral superstructures, the application creatively combines chiral and concave structures into a new chiral structure to produce a negative Poisson's ratio effect, symmetry, lightweight, impact resistance and other characteristics.

[0040] In the embodiment, the gap filler of the chiral structure is preferably low-density polyurethane foam, and the density of the buffer filler is less than 1 g / cm3. When subjected to external impact or explosion, the low-density buffer filler exhibits a high overall density state after compression under stress, thereby enhancing the anti-explosion and anti-impact effect. Moreover, due to the low density of the buffer filler, the total weight of the overall structure is significantly reduced. The chiral superstructure cell wing is made of carbon fiber 3D printing, which can greatly improve the impact resistance of the structure, reduce the occupied space of the structure, improve the space utilization of the overall structure, and has the advantages of light weight, low cost and easy manufacturing, and is suitable for large-scale application. The connecting layer is made of high-hardness ceramic material, and the connecting layer is bonded to the outer plate and the chiral structure protective layer through adhesive material, and the adhesive material is epoxy resin. By introducing the chiral superstructure and the multi-layer design, the external shock wave is effectively dispersed and absorbed, and the protection capability of the ship side is improved.

[0041] The above only describes the preferred embodiments of the application, and does not limit the patent scope of the application. Any equivalent structural transformation made according to the application, or direct / indirect application in other related technical fields under the inventive concept of the application is included in the patent protection scope of the application.

Claims

1. A chiral superstructure cell for ship side protection, characterized by: The chiral superstructure cell is a rotationally symmetric structure with a cross-section, comprising four chiral superstructure cell wings, wherein the chiral superstructure cell wings are formed by stacking planar figures in a top view, wherein the planar figure in a top view is a closed figure consisting of a rectangle and a concave figure, wherein the concave figure is formed by sequentially connecting a first side, a third arc, a second arc, a third side, a first arc, a fourth arc, and a second side end to end, wherein the first side overlaps with the long side of one side of the rectangle, one end of the second side is connected to the long side of the other side of the rectangle, the first arc and the second arc have the same center O1, the third arc and the fourth arc have the same center O, and the center O1 and the center O are respectively located on both sides of the concave figure; The length of the short side of the rectangle t, the length of the long side of the rectangle l1, and the radius r4 of the fourth arc satisfy: r4 = l1 + t; The length of the short side t of the rectangle, the length of the long side l1 of the rectangle, and the radius r3 of the third arc satisfy: The central angles of the third and fourth arcs are 25 to 45 degrees, the central angles of the first and second arcs are 90 degrees, and r4-r3=r2-r1; The length t of the short side of the rectangle is the thickness of the cell wing of the chiral superstructure; The length of the cell wing of the chiral superstructure is d, d=r3+r2; The side length of the chiral superstructure cell is C, Where C is the side length of the chiral superstructure cell.

2. The chiral superstructure cell according to claim 1, wherein: The chiral superstructure cell wings are made by carbon fiber 3D printing.

3. A chiral structural protective layer, comprising the chiral superstructure cell of claim 1 or 2, characterized in that: The chiral superstructure cells are arranged in a symmetrical array to form a chiral structure protective layer, and filler is filled in the gaps; the symmetrical array is a plurality of rows, every two adjacent chiral superstructure cells are symmetrical structures, and the chiral superstructure cells in each alternate row are in a parallel relationship; the adjacent chiral superstructure cells are connected to each other through the third side of the chiral superstructure cell wing.

4. The chiral structure protective layer according to claim 3, characterized in that: The filler is polyurethane foam with a density less than 1g / cm3.

5. A chiral superstructure ship side protection structure, comprising the chiral structure protection layer according to claim 3 or 4, characterized in that: The ship side protection structure of the chiral superstructure is provided with an outer plate, a connecting layer, a chiral structure protection layer and an inner plate from the outside to the inside, and the outer plate and the chiral structure protection layer are bonded by the connecting layer.

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