Shaking suppression honeycomb structure device with array heterogeneous wettability boundary and application

Abstract

The invention provides an anti-shaking honeycomb structure device with an array heterogeneous wettability boundary and application, a large number of regularly arranged honeycomb anti-shaking units are spliced to form an array platform, and the surface of the inner wall of each anti-shaking unit is processed into a uniformly distributed zigzag notch structure; a plurality of groups of heterogeneous wettability areas are arranged on the surfaces of the sawtooth-shaped notch structures at intervals in the height direction, a shaking liquid level is changed into a calm liquid level after flowing through the shaking-restraining honeycomb structure device, and in the process, the inner wall of each shaking-restraining unit in the shaking-restraining honeycomb structure device is provided with a specially-designed array type heterogeneous wettability boundary and a microstructure; pinning-cutting-dissipation of liquid shaking is achieved through the synergistic effect, and therefore the liquid stabilizing effect on the shaking liquid level is achieved. The device can be applied to the oscillation suppression of propellants of aircraft fuel tanks, the oscillation suppression of corrosive chemicals in the transportation process of chemical storage tanks and ballast tanks of marine floating platforms, the liquid level amplitude and the impact pressure peak value on the tank wall can be greatly reduced, and the load of the tank body structure is not increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of operation and transportation, and in particular to a honeycomb structure device with an array of heterogeneous wetting boundaries and applications. BACKGROUND

[0002] Liquid sloshing is a ubiquitous and harmful physical phenomenon in marine engineering, aerospace, chemical transportation and daily storage. When external excitations (such as the heave of a ship in waves, acceleration and deceleration of a vehicle, and maneuvering of an aircraft) act on a partially filled container, the internal liquid will slosh violently. This sloshing can cause a series of serious consequences: the violent fluctuation of the liquid surface may cause liquid overflow or gas-liquid mixing; it can generate periodic impact loads on the container wall, accelerating structural fatigue and endangering operation safety; in ships and floating platforms, liquid sloshing can change the center of gravity and affect stability; in rockets and aircraft, the sloshing of propellants can interfere with attitude control.

[0003] To suppress liquid sloshing, the traditional method is to install fixed structures inside the container, such as vertical or horizontal partitions, baffles, and porous foam fillings. These methods can break the overall sloshing mode of the liquid to some extent and increase the flow resistance. However, they have inherent limitations: first, the rigid connection of these devices with the container wall can directly transfer part of the kinetic energy of the liquid to the container structure itself, failing to fundamentally eliminate energy and only changing the force transmission path, which may still pose a threat to the structural safety in the long run. Second, the installation of fixed structures is complex and often needs to be integrated during container manufacturing or modification, making it difficult to adapt to existing or different shapes and sizes of containers, and lacking in versatility. Third, porous foam materials may have problems such as chemical reaction with stored liquids, difficulty in cleaning, or performance degradation over time.

[0004] In recent years, with the development of bionics and surface science, some new liquid stabilization designs based on special wetting surfaces have emerged. However, the structural strength, scalability, and effectiveness in large-scale practical engineering scenarios (such as large ship liquid tanks and ocean platform ballast tanks) of these studies have not been verified. In addition, some improved honeycomb or grid baffles, although they can weaken liquid sloshing by dividing the liquid surface, still rely mainly on mechanical baffles and viscous dissipation for liquid sloshing suppression, with limited efficiency and the same stress transmission problem as fixed connection with the container.

[0005] In summary, the existing liquid sloshing suppression schemes have obvious shortcomings in terms of sloshing suppression efficiency, installation convenience, adaptability to containers (avoiding stress transmission), and engineering practicality. Therefore, there is an urgent need for an innovative sloshing suppression device that can efficiently dissipate energy, adapt to liquid levels, be installed flexibly, and not transfer additional dynamic loads to the container. SUMMARY

[0006] The application is to solve the problem of how to inhibit liquid shaking, and provides a shaking-inhibiting honeycomb structure device with an array of heterogeneous wetting boundaries, which is composed of a large number of regularly arranged shaking-inhibiting honeycomb units spliced into an array platform, the inner wall surface of each shaking-inhibiting honeycomb unit is processed into a uniformly distributed sawtooth notch structure, and the surface of the sawtooth notch structure is spaced along the height direction and arranged with an array of heterogeneous wetting regions, the shaking liquid surface becomes a calm liquid surface after flowing through the shaking-inhibiting honeycomb structure device, in this process, the inner wall of each shaking-inhibiting honeycomb unit in the shaking-inhibiting honeycomb structure device has a specially designed array of heterogeneous wetting boundaries and microstructure, which cooperates to realize the "pinning, segmentation and dissipation" of liquid shaking, thereby achieving the effect of stabilizing the liquid surface. The application can be applied to the propellant shaking inhibition of aircraft fuel tanks, the shaking inhibition of corrosive chemicals during chemical storage and transportation, and the ballast tank of offshore floating platforms, which can greatly reduce the liquid surface amplitude and impact pressure peak on the tank wall without increasing the load of the tank structure.

[0007] The application provides a shaking-inhibiting honeycomb structure device with an array of heterogeneous wetting boundaries, which comprises at least two shaking-inhibiting honeycomb units spliced into a platform structure, the shaking-inhibiting honeycomb unit comprises a hollow and upper and lower opening polygonal cylindrical structure, a sawtooth notch structure connected to the inner wall of the polygonal cylindrical structure and a heterogeneous wetting interval array connected to the surface of the sawtooth notch structure. The polygonal cylindrical structure is arrayed and spliced by an external structure. The sawtooth notch structure comprises micro-convex ridges and micro-grooves which are arrayed and arranged along the height direction and connected to the inner wall of the polygonal cylindrical structure. The heterogeneous wetting interval array comprises at least two super-hydrophobic regions, at least two super-hydrophilic regions and a wetting boundary obtained by the intersection between adjacent super-hydrophobic regions and super-hydrophilic regions, which are spaced along the height direction and arranged on the surface of the micro-convex ridges and micro-grooves, the sawtooth notch structure on all inner walls in one shaking-inhibiting honeycomb unit is the same in shape, and the wetting boundary on each inner wall is the same in distribution and height. The shaking-inhibiting honeycomb structure device floats on the shaking liquid surface, when the liquid surface flows through the shaking-inhibiting honeycomb structure device, the liquid is segmented by the shaking-inhibiting honeycomb structure device into at least two liquid columns which are limited in a single shaking-inhibiting honeycomb unit, the liquid column reciprocates in the vertical direction, the horizontal flow is pinned by the wetting boundary, and when the liquid column oscillates up and down, the liquid flow flowing through the sawtooth notch structure is segmented into periodic and controllable vortices, and the vortices dissipate energy when shedding to obtain a calm liquid surface.

[0008] The shaking-inhibiting honeycomb structure device with an array of heterogeneous wetting boundaries, as a preferred mode, the height of the micro-convex ridge and the depth of the micro-groove are the same in size, the length of the bottom edge of the micro-convex ridge and the length of the bottom edge of the micro-groove are the same in size, and the top angle of the micro-convex ridge and the bottom angle of the micro-groove are both 10°-50°.

[0009] The device for suppressing sloshing of the array heterogenous wetting boundary honeycomb structure, as a preferred mode, when the liquid surface to be suppressed is a limited space, the device for suppressing sloshing covers more than 90% of the surface of the liquid surface to be suppressed. The height of the micro-ridge c The length of the bottom side is 4-8 mm a The length of the bottom side is 2-4 mm, and the inner wall of the polygonal cylindrical structure is connected with 24-60 groups of micro-ridges and micro-grooves distributed uniformly, and the distance between the tips of the two micro-ridges with the smallest distance on the adjacent two polygonal cylindrical structures is 0.5a-a.

[0010] The device for suppressing sloshing of the array heterogenous wetting boundary honeycomb structure, as a preferred mode, the water contact angle of the super-hydrophobic region is greater than or equal to 150 degrees, and the contact angle of the super-hydrophilic region is less than or equal to 30 degrees. The height of the super-hydrophobic region H The ratio of the height of the super-hydrophilic region to the height of the super-hydrophobic region is 1 / 5-5 / 1. H The width of the wetting boundary is 0.1-1.0 mm.

[0011] The device for suppressing sloshing of the array heterogenous wetting boundary honeycomb structure, as a preferred mode, the polygonal cylindrical structure comprises a polygonal cylindrical body and a splicing ridge and a splicing groove connected to different outer walls of the polygonal cylindrical body, respectively. The polygonal cylindrical body is a splicing structure, the polygonal cylindrical body is polygonal or circular, the edges and ridges of the splicing ridge correspond to the edges and grooves of the splicing groove of another polygonal cylindrical structure, respectively, and the adjacent polygonal cylindrical bodies are fixed and closely connected by inserting the splicing ridge into the splicing groove. The splicing ridge is a symmetrical structure extending outward with increasing width, and the outermost surface of the splicing ridge is parallel to the outer wall of the polygonal cylindrical body, and the splicing groove is a groove structure corresponding to the splicing ridge structure. The length of the bottom side of the splicing ridge l The length of the top side of the splicing ridge is less than the length of the top side of the splicing groove l The length of the top side of the splicing ridge is less than the length of the bottom side of the splicing groove l The length of the top side of the splicing ridge is less than the length of the bottom side of the splicing groove l The protruding height of the splicing ridge h The recess depth of the splicing groove h 1.

[0012] The device for suppressing sloshing of the array heterogenous wetting boundary honeycomb structure, as a preferred mode, the polygonal cylindrical body is hexagonal, and the inner diameter of the polygonal cylindrical body is 20-60 mm D The height of the polygonal cylindrical body is 10-200 mm H The wall thickness of the polygonal cylindrical body​L 10~30 mm; ; l 3 ratio l 1 mm, l 4 ratio l 2 mm, h 2 ratio h 1 mm, l 1 is (1 / 12~1 / 8) D .

[0013] The invention provides a honeycomb structure device with an array of heterogeneous wetting boundary for suppressing sloshing, preferably, the natural frequency of liquid column oscillation is: ; wherein, g g is the acceleration of gravity, h h is the static height of liquid column, n n is the number of sloshing suppression units; By adjusting the height of the sloshing suppression unit H and the inner diameter D The static height of the liquid column can be adjusted h , so that the natural frequency f n is close to the external excitation frequency; In order to suppress the low-frequency long-period sloshing of the offshore platform, the height of the sloshing suppression unit can be increased or decreased to reduce the natural frequency to approach the external excitation frequency, and the energy is absorbed by resonance; In order to suppress the high-frequency vibration of the transport tank truck, the height of the sloshing suppression unit can be reduced to be far away from the excitation band. This adjustability makes the invention have wide frequency adaptability.

[0014] The invention provides a honeycomb structure device with an array of heterogeneous wetting boundary for suppressing sloshing, preferably, the material density of the sloshing suppression unit is 10%~80% of the liquid density; The material of the sloshing suppression unit is a thermoplastic or thermosetting plastic with a material density ≤0.9 g / cm³; The thermoplastic includes: carbon fiber reinforced polyether ether ketone, polyether ketone ketone; the thermosetting plastic is: polypropylene, polyethylene, polyolefin, polyurethane and polylactic acid; When the liquid is a corrosive liquid, a polytetrafluoroethylene corrosion-resistant coating is added to the surface of the sloshing suppression unit, and a graphene conductive coating can be applied to the surface to eliminate static electricity; The body of the sawtooth notch structure is super-hydrophilic material, or is coated with nano-TiO2 super-hydrophilic paint or is treated with super-hydrophilic plasma activation; The super-hydrophobic region is obtained by coating with nano-SiO2 super-hydrophobic paint or by super-hydrophobic treatment by a mask plate method and a local fluorosilane chemical vapor deposition method.

[0015] The preparation method of the anti-slosh unit comprises the following steps: S1, integrally processing a polygonal cylindrical structure with a sawtooth notch structure by injection molding or 3D printing or mold pressing; S2, performing regional super-hydrophobic treatment on the surface of the sawtooth notch structure to obtain an array of heterogeneous wetting regions, when the contact angle of the sawtooth notch structure is greater than 30 degrees, the surface of the sawtooth notch structure can be first treated by super-hydrophilic treatment, and then treated by regional super-hydrophobic treatment; S3, splicing the anti-slosh units by splicing convex ribs and splicing grooves to obtain the anti-slosh honeycomb structure device.

[0016] The application of the anti-slosh honeycomb structure device with an array of heterogeneous wetting boundaries is provided, and the anti-slosh honeycomb structure device can be applied to propellant anti-sloshing of an aircraft fuel tank, corrosive chemical anti-sloshing during chemical tank transportation, and ballast tanks of offshore floating platforms.

[0017] In the present application, the cross-sectional shape of the honeycomb unit can be replaced by a circle, a square or other polygons; the wetting boundary of the honeycomb unit can be formed by surface coating, plasma treatment, laser microstructure or multi-material injection molding; the notch structure can adopt a sawtooth shape, a wave shape or a convex-concave combined structure to achieve equivalent flow energy consumption; the communication holes can be arranged at the bottom or the sidewall and can adopt a micropore array or a flow limiting structure; and the device material can be selected from a high polymer material, a composite material or a metal substrate with a surface modification layer.

[0018] The present application has the following advantages: The present application is composed of a large number of regularly arranged honeycomb anti-slosh units spliced into an array platform, each anti-slosh unit is integrally processed by 3D printing, injection molding or mold pressing, and the inner wall surface is processed into a uniformly distributed sawtooth notch structure, and a plurality of heterogeneous wetting regions are arranged on the wall surface of each sawtooth notch structure in a spaced manner along the height direction, after the sloshing liquid surface flows through the anti-slosh honeycomb structure device, it becomes a calm liquid surface, in this process, the inner wall of each anti-slosh unit in the anti-slosh honeycomb structure device has a specially designed array of heterogeneous wetting boundaries and microstructures, which cooperatively realize the functions of “pinning, segmentation and dissipation” of the liquid sloshing, thereby achieving the effect of stabilizing the sloshing liquid surface. The present application can be applied to propellant anti-sloshing of an aircraft fuel tank, corrosive chemical anti-sloshing during chemical tank transportation, and ballast tanks of offshore floating platforms, can greatly reduce the liquid surface amplitude and the impact pressure peak on the tank wall, and the device freely floats with the liquid level without increasing the load of the tank structure, and has corrosion resistance and durability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a working schematic diagram of a honeycomb structure device with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 2 is a oblique view of a honeycomb structure device with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 3 is a front view of a honeycomb structure device with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 4 is a left view of a honeycomb structure device with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 5 is a top view of a honeycomb structure device with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 6 is a front view of a suppressing sloshing unit with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 7 is a left view of a suppressing sloshing unit with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 8 is a top view of a suppressing sloshing unit with array heterogeneous wettability boundary and application of suppressing sloshing; Figure 9 is a schematic diagram of alternating arrangement of inner wall super-hydrophobic region and super-hydrophilic region of a honeycomb structure device with array heterogeneous wettability boundary and application of suppressing sloshing.

[0020] REFERENCE NUMERALS: 1, suppressing sloshing unit; 11, polygonal cylindrical structure; 111, polygonal cylindrical body; 112, splicing convex rib; 113, splicing concave groove; 12, zigzag notch structure; 121, micro convex rib; 122, micro concave groove; 13, heterogeneous wettability interval array; 131, super-hydrophobic region; 132, super-hydrophilic region; 133, wettability boundary line; 2, sloshing liquid surface; 3, calm liquid surface. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Embodiment 1

[0022] A sloshing suppression honeycomb structure device with arrayed heterogeneous wettability boundaries and its application are disclosed. The device constructs an array platform floating on a liquid surface, composed of independent honeycomb units (sloshing suppression units 1). The sloshing liquid surface 2 becomes a calm liquid surface 3 after flowing through the sloshing suppression honeycomb structure device. During this process, the inner wall of each sloshing suppression unit 1 in the sloshing suppression honeycomb structure device has a specially designed arrayed heterogeneous wettability boundary and microstructure, which work synergistically to achieve "pinning-segmentation-dissipation" of the liquid sloshing. Figure 1 This achieves the effect of stabilizing the swaying liquid surface.

[0023] Sway suppression platform and sway suppression unit design. The device of this invention is a floating platform that can cover most of the liquid surface, which is composed of a large number of regularly arranged honeycomb cavity units (sway suppression units 1) spliced ​​together. Figures 2-5 ).by Figure 2 For example, the polygonal cylindrical structure 11 of the sway suppression unit 1 is a hexagonal cavity structure. The center of this platform is the first sway suppression unit, surrounded by sequentially arranged second, third, fourth, fifth, sixth, and seventh sway suppression units with the same structure. Taking the first sway suppression unit as an example... Figure 3 As shown, the unit consists of a polygonal cylindrical structure 11, three splicing protrusions 112 connected to the outer surfaces of the different polygonal cylindrical structures 11, and three splicing grooves 113. The inner wall of the polygonal cylindrical structure 11 is a biomimetic heterogeneous wettable inner wall. The inner diameter of the polygonal cylindrical structure 11 is... D 20~60 mm, height H The unit wall thickness is 10~200 mm. L The length is 10~30 mm; the top edge length of the splicing groove 113 is... l 1. The length of the base is l 2. Depth is h 1. Height is H ,in, l 1 = (1 / 2) l 2 = (1 / 12 ~ 1 / 8) D The length of the bottom edge of the splicing convex rib 112 is... l 3. The length of the top edge is l 4. Height is h 2, of which, l 3 to l 1 mm smaller l 4 to l 2 small 1 mm, h 2 to h1 mm. According to the size and shape of the wobbling liquid surface 2, by adjusting the number and direction of the spliced anti-wobbling units 1, anti-wobbling platforms (anti-wobbling honeycomb structure devices) of different sizes and shapes can be formed to achieve the best anti-wobbling effect. The anti-wobbling units are spliced into anti-wobbling platforms through splicing ridges and splicing grooves.

[0024] Heterogeneous wetting interval array design. On the inner wall surface of each anti-wobbling unit 1, a series of heterogeneous wetting regions are arranged in an interval along the height direction. As shown in Figure 9 , the gray area is a super-hydrophobic region 131 formed by super-hydrophobic treatment (such as nano-SiO2 super-hydrophobic coating or local fluorosilane chemical vapor deposition method through a mask plate) of the substrate of the anti-wobbling unit 1, with a water contact angle ≥ 150°; the white area is a super-hydrophilic region 132 maintained or treated as super-hydrophilic (such as nano-TiO2 super-hydrophilic coating or plasma activation), with a contact angle ≤ 30°. The unit height of the super-hydrophobic region 131 is H 1, and the unit height of the super-hydrophilic region 132 is H 2, H 1 and H 2. The height ratio of the super-hydrophobic region 131 to the super-hydrophilic region 132 is between 1 / 5 and 5 / 1. A very clear annular wetting boundary 133 is formed between the super-hydrophobic region 131 and the super-hydrophilic region 132, with a width precisely controlled between 0.1 and 0.5 mm. This boundary plays a crucial role. Due to the huge difference in surface energy on both sides of the boundary, the three-phase contact line of the liquid surface will be strongly "pinned" on this boundary, like being locked by an invisible fence (as shown in Figure 5 ). When external excitation tries to cause horizontal movement of the liquid surface, it needs to overcome a huge contact angle hysteresis energy barrier, thereby greatly inhibiting the lateral slip of the liquid surface within the unit and confining the kinetic energy of the liquid to vertical oscillation.

[0025] Sawtooth notch energy dissipation structure. In order to further dissipate the oscillation energy of the liquid confined in the vertical direction, the inner wall surface of each anti-wobbling unit 1 is integrally processed by 3D printing, injection molding or mold molding into 24-60 uniformly distributed sawtooth notch structures 12 (see Figures 6-9 ). As shown in Figure 9 , these sawtooth notch structures 12 are composed of micro-ridges 121 and micro-grooves 122 arranged in an interval. The length of the bottom edge of the micro-ridge 121 is a , between 2 and 4 mm, and the height of the micro-ridge 121 is c , between 4 and 8 mm; the length of the bottom edge of the micro-groove 122 is b , between 2 and 4 mm, and the depth of the micro-groove 122 is d, between 4~8 mm. The apex angle of the ridge and the bottom angle of the groove range from 10°~50° (with 30° as the optimal). When the liquid column oscillates up and down in the cell, the liquid flow through the sharp sawtooth structure will separate and generate a series of periodic, controllable scale vortices. The generation and shedding of these vortices will efficiently convert the ordered kinetic energy of the liquid into disordered thermal energy (turbulent energy dissipation). This ingenious design cleverly utilizes microstructure to induce macro energy dissipation, significantly enhancing the damping characteristics of the cell.

[0026] The dynamic design of the honeycomb cell When the container is shaken, the liquid as a whole moves greatly in the traditional scheme; in the present invention, the liquid is divided into countless "liquid columns" confined within a single cell by the honeycomb array. These liquid columns mainly undergo reciprocating oscillation in the vertical direction, and their horizontal macroscopic flow is strictly limited by the cell wall. More importantly, the special design of the inner wall of each cell further suppresses the oscillation. Through the card slot structure (ridge and groove) of the side wall. Each honeycomb cell can be regarded as a "liquid column oscillator" under the action of gravity. The formula for the natural frequency of small amplitude oscillation is: ; where, h is the static height of the liquid column. By adjusting the height H and the inner diameter D of the cell, f the natural frequency f can be changed. n For example, to suppress the low-frequency long-period oscillation of a marine platform, a higher cell can be designed to reduce the natural frequency and approach the external excitation frequency to achieve resonance energy absorption; while to suppress the high-frequency vibration of a transport tank truck, a shorter cell can be designed to increase the natural frequency and move away from the excitation band. This adjustability makes the present invention have wide frequency adaptability.

[0027] The materials and manufacturing devices are preferably made of high-performance thermoplastic composites such as carbon fiber reinforced polyether ether ketone (PEEK), polyether ketone ketone (PEKK), etc. This type of material has low density (≤0.9 g / cm³), high specific strength, good fatigue resistance and chemical corrosion resistance, perfectly meeting the requirements of floating, bearing and durability. The manufacturing process can use high-precision injection molding or 3D printing to realize the integrated molding of the honeycomb array, the wetness partition of the inner wall and the sawtooth notch, ensuring the structural strength and consistency. The density is precisely controlled to be lower than the density of the stored liquid (preferably 10%~80% lower), so that it can always float and adaptively rise and fall with the liquid level. Polypropylene (PP), polyethylene (PE), polyolefin (PO), polyurethane (PU), polylactic acid (PLA), etc. thermosetting or thermoplastic resins can also be selected to meet the requirements of weight, strength, corrosion resistance and cost in different application scenarios.

[0028] This embodiment uses carbon fiber reinforced PEEK material. The single polygonal cylindrical structure 11 is a regular hexagon, with an inner diameter D = 40 mm, and a height H = 80 mm (aspect ratio 2.0). The super-hydrophobic region 131 on the upper part of the inner wall of the shimmy suppression unit 1 has a contact angle of 155°, and the super-hydrophilic region 132 on the lower part has a contact angle of 10°. The height ratio of the super-hydrophobic region 131 to the super-hydrophilic region 132 is H 1: H 2 = 1:1. Forty-eight uniform sawtooth notch structures 12 with a depth of 6 mm and a bottom edge length of 2 mm are formed on the inner wall of each shimmy suppression unit 1. According to the target fuel tank size, 10 1 ~10 4 units are spliced to form an array panel covering more than 90% of the liquid surface in the tank.

[0029] Under the simulation of typical sea conditions with ship roll ±15°, after installing the device, the maximum amplitude of the liquid surface in the tank is expected to be reduced by ~80%, and the peak impact pressure on the tank wall is reduced by ~70%. The device freely floats with the liquid level, without increasing the load on the tank structure. Example 2

[0030] A shimmy suppression honeycomb structure device with an array of heterogeneous wetting boundaries and its application, using the same structure and preparation method as in Example 1, is applied to chemical storage tank transportation; To adapt to corrosive chemicals, a polytetrafluoroethylene (PTFE) anti-corrosion coating is added to the surface of the PEEK matrix, and a graphene conductive coating can be applied to the surface to eliminate static electricity. The unit size can be adjusted according to the size of the tank.

[0031] After 5000 vibration cycle tests simulating road transportation, the shimmy suppression performance of the device is attenuated by less than 3%, and the surface coating wear rate is extremely low (<0.02 μm / thousand cycles). It proves its durability under long-term dynamic load and harsh chemical environment. Example 3

[0032] A shimmy suppression honeycomb structure device with an array of heterogeneous wetting boundaries and its application, using the same structure and preparation method as in Example 1, is flexibly applied to aircraft fuel tanks (to suppress propellant shaking during maneuvering and ensure control stability) and ballast tanks of offshore floating platforms (to reduce internal water sloshing caused by waves and improve overall stability of the platform). Only by adjusting the coverage area of the array panel and the inherent frequency design parameters of the unit according to the size and liquid properties of the specific container.

[0033] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries, characterized in that: It includes at least two sway-suppressing units (1) spliced ​​into a platform structure. The sway-suppressing unit (1) includes a hollow polygonal cylindrical structure (11) with openings at the top and bottom, a serrated notch structure (12) connected to the inner wall of the polygonal cylindrical structure (11), and a heterogeneous wettability spacer array (13) connected to the surface of the serrated notch structure (12). The polygonal cylindrical structure (11) is arrayed and spliced ​​through an external structure; The sawtooth notch structure (12) includes micro-protrusions (121) and micro-grooves (122) that extend along the height direction and are arranged in an array on the inner wall of the polygonal cylindrical structure (11). The heterogeneous wettability spacer array (13) includes at least two superhydrophobic regions (131), at least two superhydrophilic regions (132) spaced along the height direction on the surfaces of the micro-protrusions (121) and the micro-grooves (122), and a wettability boundary (133) formed by the intersection of adjacent superhydrophobic regions (131) and superhydrophilic regions (132). The serrated notch structures (12) on all inner walls of a sway suppression unit (1) are identical in shape, and the wettability boundary (133) on each inner wall uses the same distribution and the same height. The sway-suppressing honeycomb structure device floats on the swaying liquid surface (2). When the liquid surface flows through the sway-suppressing honeycomb structure device, the liquid is divided into at least two liquid columns confined within a single sway-suppressing unit (1). The liquid columns oscillate back and forth in the vertical direction, and the flow in the horizontal direction is pinned by the wettability boundary (133). When oscillating up and down, the liquid flow through the sawtooth notch structure (12) is divided into periodic, scale-controllable vortices. When the vortices fall off, the energy is dissipated to obtain a calm liquid surface (3).

2. The sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 1, characterized in that: The height of the micro-protrusion (121) and the depth of the micro-groove (122) are the same. The bottom edge length of the micro-protrusion (121) is the same as the bottom edge length of the micro-groove. The apex angle of the micro-protrusion (121) and the bottom angle of the micro-groove (122) are both 10°~50°.

3. The anti-sway honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 2, characterized in that: When the liquid surface to be suppressed is a limited space, the suppression honeycomb structure device covers more than 90% of the surface of the liquid surface to be suppressed; The height of the micro-protrusion (121) c 4~8 mm, base length a The diameter is 2~4 mm. 24~60 sets of micro-protrusions (121) and micro-grooves (122) are evenly distributed on one inner wall of the polygonal cylindrical structure (11). The distance between the sharp corners of the two micro-protrusions (121) with the smallest distance on two adjacent polygonal cylindrical structures (11) is 0.5a~a.

4. The sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 1, characterized in that: The water contact angle of the superhydrophobic region (131) is ≥150°, and the contact angle of the superhydrophilic region (132) is ≤30°; The height of the superhydrophobic region (131) H 1 and the height of the superhydrophilic region (132) H The ratio of 2 is 1 / 5 to 5 / 1; The width of the wettability boundary (133) is 0.1~1.0 mm.

5. The sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 1, characterized in that: The polygonal cylindrical structure (11) includes a polygonal cylindrical body (111) and splicing protrusions (112) and splicing grooves (113) respectively connected to different outer walls of the polygonal cylindrical body (111). The polygonal cylindrical body (111) is a splicable structure. The polygonal cylindrical body (111) is polygonal or circular. The edges and protrusions of the splicing protrusions (112) correspond to the edges and grooves of the splicing grooves (113) of another polygonal cylindrical structure (11). Adjacent polygonal cylindrical bodies (111) are fixed and tightly connected by inserting the splicing protrusions (112) into the splicing grooves (113). The splicing protrusion (112) is a symmetrical structure that extends outward and increases in width. The outermost surface of the splicing protrusion (112) is parallel to the outer wall of the polygonal cylindrical body (111). The splicing groove (113) is a groove structure corresponding to the structure of the splicing protrusion (112). The length of the bottom edge of the splicing protrusion (112) l 3 is less than the top edge length of the splicing groove (113) l 1. The top edge length of the splicing protrusion (112) l 4 is less than the bottom edge length of the splicing groove (113) l 2. The protrusion height of the splicing ridge (112) h 2 is less than the recess depth of the splicing groove (113) h 1.

6. The sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 5, characterized in that: The polygonal cylindrical body (111) is hexagonal, and the inner diameter of the polygonal cylindrical body (111) is... D 20~60mm, height H 10~200 mm, wall thickness L It is 10~30 mm; ； l 3 to l 1 mm smaller l 4 to l 2 small 1 mm, h 2 to h 1 mm smaller l 1 represents (1 / 12~1 / 8) D .

7. The sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 1, characterized in that: The natural frequency of the liquid column oscillation is: ； in, g It is the acceleration due to gravity. h This is the static height of the liquid column. n The number of the sway suppression units (1); By adjusting the height of the sway suppression unit (1) H and inner diameter D Adjustable static height of liquid column h To make the natural frequency f n Approximately the external excitation frequency; To suppress the low-frequency long-period swaying of the offshore platform, the height of the sway suppression unit (1) can be increased to reduce the natural frequency to approach the external excitation frequency, thereby absorbing energy through resonance. To suppress high-frequency vibrations of the transport tanker, the height of the sway suppression unit (1) can be reduced.

8. The sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 1, characterized in that: The material density of the sway suppression unit (1) is 10% to 80% of the density of the liquid; The material of the sway suppression unit (1) is a thermoplastic or thermosetting plastic with a material density ≤0.9 g / cm³. The thermoplastics include: carbon fiber reinforced polyetheretherketone and polyetherketoneketone; the thermosetting plastics include: polypropylene, polyethylene, polyolefin, polyurethane and polylactic acid; When the liquid is corrosive, the surface of the anti-sloshing unit (1) is coated with a polytetrafluoroethylene anti-corrosion coating, and a graphene conductive coating can be applied to the surface to eliminate static electricity. The serrated notch structure (12) is made of a superhydrophilic material, or is treated with a superhydrophilic coating of nano-TiO2 or plasma activation. The superhydrophobic region (131) is obtained by coating with nano-SiO2 superhydrophobic coating or by superhydrophobic treatment by local fluorosilane chemical vapor deposition using a mask method.

9. A sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to claim 5, characterized in that: The method for preparing the sway suppression unit (1) includes the following steps: S1. A polygonal cylindrical structure (11) with a serrated notch structure (12) is obtained by injection molding, 3D printing or compression molding. S2. The surface of the sawtooth notch structure (12) is subjected to regional superhydrophobic treatment to obtain a heterogeneous wettability spacer array (13). When the contact angle of the sawtooth notch structure (12) is >30°, the entire surface can be superhydrophilic first, and then the regional superhydrophobic treatment can be performed. S3. All the sway-suppressing units (1) are spliced ​​together through the splicing protrusions (112) and the splicing grooves (113) to obtain a sway-suppressing honeycomb structure device.

10. The application of a sway-suppressing honeycomb structure device with arrayed heterogeneous wettability boundaries according to any one of claims 1 to 9, characterized in that: The aforementioned sloshing-suppressing honeycomb structure device can be applied to propellant sloshing suppression in aircraft fuel tanks, sloshing suppression of corrosive chemicals during chemical storage tank transportation, and ballast tanks of offshore floating platforms.

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