Porous multi-cavity bearing-wave absorbing-energy absorbing integrated structure

Abstract

The porous multi-cavity bearing-wave absorbing-energy absorbing integrated structure comprises an upper-layer plate, reinforcing ribs and a lower-layer plate, the reinforcing ribs are arranged on the upper side and the lower side of the upper-layer plate, the reinforcing ribs on the lower side of the upper-layer plate are connected with the upper side of the lower-layer plate, and a cavity is formed between the upper-layer plate and the lower-layer plate; according to the invention, the plate lattice dot matrix containing a large number of cavity structures is arranged, so that the whole structure has higher mechanical properties while keeping light weight, the cavities are formed by separating the reinforcing ribs of the reinforced equilateral triangle sandwich plate, and a periodic porous multi-cavity structure is formed; according to the arrangement mode, the specific strength and specific stiffness of the structure can be remarkably improved, under the action of an external load, a large number of cavities can uniformly disperse stress, damage caused by local gathering is avoided, meanwhile, the energy absorption capacity is improved, and therefore the structure has the high specific energy absorption characteristic.

Description

Technical Field

[0001] This invention relates to the field of composite functional structure technology, and in particular to a porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy. Background Technology

[0002] In high-end equipment fields such as aerospace, the design of the main load-bearing structure has always been one of the key technical issues. These structures not only need to withstand various complex loads under normal service conditions, but also need to maintain sufficient strength, stiffness, and reliability during long-term use to meet the stringent safety and stability requirements of aircraft and spacecraft. With the continuous improvement of equipment performance and the increasing complexity of mission environments, traditional strength-based structural design concepts are no longer sufficient to meet future development needs. Lightweighting has become an important goal of modern structural design. By adopting advanced structural design concepts and new material systems, not only can manufacturing costs and fuel consumption be effectively reduced, but the mobility and mission adaptability of equipment can also be significantly improved. For example, in aircraft, lightweight design can reduce takeoff weight and extend the range of flight paths. Longer range and improved payload utilization are key advantages. In spacecraft, this translates to reduced launch costs and increased payload capacity. Therefore, achieving high efficiency and lightweight design while maintaining load-bearing capacity has become a current research focus. Meanwhile, the demand for functional integration of structures is becoming increasingly prominent. In military equipment, the main load-bearing structure must not only meet basic load-bearing requirements but also possess additional functions. On the one hand, to improve the stealth performance of equipment, the structure should have excellent wave absorption and noise reduction characteristics, thereby reducing the probability of exposure in complex electromagnetic environments and improving battlefield survivability. On the other hand, when equipment suffers sudden impacts, explosions, or collisions, the structure must also exhibit excellent energy absorption characteristics to effectively reduce the transmission of external impact loads to key components, thereby enhancing overall protection performance and reliability.

[0003] In practice, some problems still exist:

[0004] In the design of integrated wave absorption and energy absorption structures, it is usually necessary to achieve lightweighting while ensuring wave absorption performance to meet the stringent weight requirements of aerospace, military, and other fields. However, common wave absorption methods in existing technologies mainly rely on filling with wave-absorbing materials or coating the surface with wave-absorbing coatings. While the former can improve wave absorption performance to some extent, it often leads to a significant increase in structural mass, thus affecting the achievement of the lightweight goal; while the latter is easy to process, the wave absorption effect will decay over time due to the susceptibility of the coating to surface wear or aging, making it difficult to maintain long-term stability.

[0005] Secondly, most existing absorbing structures are optimized only for a specific frequency, and in engineering applications, they can only achieve good absorption within a single frequency band, failing to simultaneously achieve absorption across multiple frequency bands, including low, mid, and high frequencies. This shortcoming greatly limits their practical application value in complex electromagnetic environments, and is particularly difficult to meet the broadband absorption requirements of aerospace and military equipment.

[0006] Furthermore, in the aforementioned fields, there are extremely stringent requirements for the impact resistance and protection performance of equipment. Existing solutions often rely on additional energy-absorbing materials to enhance protection capabilities, but this inevitably brings additional structural weight, which severely reduces the mobility and reliability of the equipment.

[0007] Therefore, how to effectively achieve high load-bearing capacity, multi-band wave absorption performance, and excellent energy absorption performance while ensuring lightweight structure has become a major problem that current technology urgently needs to solve. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the aforementioned problems in the prior art, this invention provides a porous, multi-cavity integrated load-bearing, wave-absorbing, and energy-absorbing structure. This solves the problem of simultaneously achieving load-bearing, wave-absorbing, and energy-absorbing functions, enabling a lightweight design that ensures the structure's load-bearing capacity and energy absorption efficiency while simultaneously improving its wave-absorbing performance at different frequencies.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the main technical solution adopted by the present invention is as follows:

[0012] A porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy includes an upper plate, reinforcing ribs, and a lower plate. The upper plate has reinforcing ribs on both its upper and lower sides. The reinforcing ribs on the lower side of the upper plate are connected to the upper side of the lower plate, forming a cavity between the upper plate and the lower plate. The reinforcing ribs act as a grid core, dividing the cavity into multiple smaller cavities.

[0013] The upper plate and the reinforcing ribs are provided with a plurality of through holes that extend to the lower plate. The through holes and the small cavity together form the first Helmholtz resonant cavity.

[0014] The reinforcing ribs are arranged in an equilateral triangle structure. The upper side of the reinforcing ribs on the upper plate is provided with deep holes. The depth of the deep holes is greater than the depth of the holes in the panel, which is used to adjust the absorption frequency of the first Helmholtz resonant cavity.

[0015] Multiple reinforced equilateral triangular sandwich panels are spliced ​​together, and the three corners of every four reinforced equilateral triangular sandwich panels intersect in pairs to form the first connection point, forming a triangular pyramid.

[0016] The triangular pyramid forms a medium-sized cavity inside, and the through hole and the medium-sized cavity together form a second Helmholtz resonant cavity.

[0017] Multiple triangular pyramids are spliced ​​together to form eight wave-absorbing units, which are combined into a sound-absorbing cell circle through rotation and symmetry.

[0018] The first connection points of the eight wave-absorbing units are further intersected in pairs to form second connection points, thereby forming an integrated structure that carries wave absorption and energy absorption.

[0019] The eight absorbing units are combined to form a large cavity, and the through hole and the large cavity together form a third Helmholtz resonant cavity.

[0020] The reinforcing ribs are arranged in a triangular unit manner, and after splicing, they form a closed plate grid lattice structure.

[0021] The integrated structure for bearing wave absorption and energy absorption contains three cavities of different sizes and two neck tubes of different lengths, which can form three types of Helmholtz resonant cavities to achieve multi-band wave absorption characteristics.

[0022] The integrated structure for bearing wave absorption and energy absorption contains a large number of cavities.

[0023] (III) Beneficial Effects

[0024] The beneficial effects of this invention are:

[0025] 1. In this invention, by setting up a plate grid lattice with a large number of cavities, the overall configuration achieves higher mechanical performance while maintaining lightweight. The cavities are separated by stiffeners of reinforced equilateral triangular sandwich plates, forming a periodic porous multi-cavity structure. This arrangement can significantly improve the specific strength and specific stiffness of the structure. Under external load, the large number of cavities can uniformly distribute stress, avoiding damage caused by local accumulation, while improving energy absorption capacity. Thus, the structure has high specific energy absorption characteristics. Compared with traditional solid or simple sandwich structures, this invention achieves multiple effects of load-bearing, weight reduction and energy absorption without increasing material usage. It is especially suitable for fields with high requirements for lightweight and safety, such as aerospace, ships and vehicles.

[0026] 2. In this invention, by setting a reinforced equilateral triangular sandwich panel, the geometric units enclosed by the internal reinforcing ribs are all equilateral triangles, thereby forming a stable lattice structure. As the most stable geometric unit, the triangle can effectively prevent local instability of the thin-walled structure under stress. This invention arranges triangular reinforcing ribs on both the upper and lower sides of the panel, forming a continuous and closed plate grid network in the overall structure. This design with triangular reinforcement not only improves the load-bearing capacity, but also significantly enhances the bending stiffness and buckling resistance. Compared with traditional rectangular or honeycomb sandwich panels, the triangular lattice structure of this invention can delay buckling to a greater extent and improve overall stability, thereby ensuring that it can maintain excellent mechanical properties under complex working conditions such as high load, vibration and impact.

[0027] 3. In this invention, by opening multiple through holes of different lengths on the sandwich panel and reinforcing ribs, and combining the distribution of small, medium and large cavities, a multi-band Helmholtz resonant cavity is effectively constructed. The through holes act as neck tubes and couple with the cavities. Different neck tubes and cavities of different sizes correspond to different resonant frequencies. Therefore, the overall structure can achieve wave absorption function in multiple frequency ranges. Small cavities are suitable for higher frequency absorption, medium cavities are suitable for mid-frequency absorption, and large cavities perform well in the low frequency range. Through this multi-scale and multi-band design, this invention breaks through the limitation of traditional single cavity structures that can only target narrow frequency band absorption, and achieves a wide frequency band wave absorption effect. At the same time, this structure has both load-bearing and energy absorption functions while ensuring wave absorption performance, truly realizing the design goal of integrated load-bearing, wave absorption and energy absorption. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the integrated structure for carrying wave absorption and energy absorption of the present invention. (a)-(c) are magnified details of the structure from the whole to the part.

[0029] Figure 2 This is a cross-sectional view of the integrated structure for bearing wave absorption and energy absorption of this invention. (a)-(c) are magnified detail views of the structure from the whole to the part.

[0030] Figure 3 The structure of the 3×3×3 array carrying the integrated wave absorption and energy absorption structure of the present invention;

[0031] Figure 4 The energy absorption curve is a simulation calculation of the energy absorption of a 3×3×3 cell circle of the integrated energy absorption and wave absorption structure of the present invention.

[0032] Figure 5 This is a schematic diagram of the assembly process of the present invention.

[0033] [Explanation of Labels in the Attached Image]

[0034] 1. Lower plate; 2. Upper plate; 3. Reinforcing rib; 4. Through hole; 5. Small cavity; 6. Wave absorbing unit; 7. Medium cavity; 8. Integrated structure for load-bearing wave absorption and energy absorption; 9. Large cavity; 10. First connection point; 11. Second connection point. Detailed Implementation

[0035] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Please refer to Figures 1 to 5 As shown, the present invention provides a porous multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy, including an upper plate 2, reinforcing ribs 3, and a lower plate 1. The upper plate 2 is provided with reinforcing ribs 3 on both the upper and lower sides. The reinforcing ribs 3 on the lower side of the upper plate 2 are connected to the upper side of the lower plate 1, so that a cavity is formed between the upper plate 2 and the lower plate 1. The reinforcing ribs 3 act as a grid core to divide the cavity into multiple small cavities 5.

[0037] Multiple through holes 4 are evenly distributed on the upper plate 2 and the reinforcing ribs 3, extending to the lower plate 1. The through holes 4 and the small cavities 5 together form the first Helmholtz resonant cavity. In actual implementation, in this invention, the lower plate 1 and the upper plate 2 are fixedly connected by the reinforcing ribs 3 to form an integrated load-bearing, wave-absorbing, and energy-absorbing structure 8. The reinforcing ribs 3, as the core of the grid, divide the space between the upper and lower plates 1 into multiple small cavities 5, and multiple through holes 4 are formed through the upper plate 2, the reinforcing ribs 3, and the lower plate 1. The through holes 4 and the small cavities 5 form the first Helmholtz resonant cavity, which can effectively absorb high-frequency wave energy. In actual implementation, the distribution of the through holes 4 and the number of small cavities 5 can be optimized through modeling and simulation, so that the structure has both lightweight and stability, thereby achieving good wave-absorbing performance while ensuring load-bearing strength.

[0038] Optionally, the reinforcing ribs 3 are arranged in an equilateral triangular structure. The reinforcing ribs 3 on the upper side of the upper plate 2 have deep holes, the depth of which is greater than the depth of the through-holes in the panel, used to adjust the absorption frequency of the first Helmholtz resonant cavity. In actual implementation, the reinforcing ribs 3 are arranged in equilateral triangular units, and the upper reinforcing ribs 3 on the upper side of the upper plate 2 have deep holes, the depth of which is greater than the depth of the through-holes 4 in the panel. This arrangement can change the resonant frequency of the first Helmholtz resonant cavity, achieving frequency downregulation, thereby enhancing the absorption effect on specific frequency bands. In actual implementation, the size of the deep holes can be designed according to the target frequency range and processed using additive manufacturing technology. This design enables the structure of the present invention to be adjustable across multiple frequency bands, while avoiding the narrow frequency range defect of the traditional single through-hole 4 structure, significantly improving the overall absorption efficiency.

[0039] Optionally, multiple reinforced equilateral triangular sandwich panels are spliced ​​together, and the three corners of every four reinforced equilateral triangular sandwich panels intersect in pairs to form a first connection point 10, forming a triangular pyramid.

[0040] The triangular pyramid forms a medium-sized cavity 7 inside, and the through hole 4 together with the medium-sized cavity 7 forms a second Helmholtz resonant cavity. In actual implementation, multiple stiffened equilateral triangular sandwich panels are spliced ​​together, with the three corners of every four panels intersecting in pairs to form the first connection point 10, which is then assembled into a triangular pyramid unit. The triangular pyramid forms a medium-sized cavity 7 inside, which together with the through hole 4 constitutes the second Helmholtz resonant cavity. In actual implementation, the geometric arrangement of the triangular pyramid not only ensures the stability of the spliced ​​structure, but also provides mid-frequency absorption characteristics. This modular design facilitates array assembly and enables large-scale manufacturing and rapid assembly in engineering applications.

[0041] Optionally, multiple triangular pyramids are spliced ​​together to form eight sound-absorbing units 6, and the sound-absorbing units 6 are combined in a rotational and symmetrical manner to form a sound-absorbing cell.

[0042] The first connection points 10 of the eight absorbing units 6 are further intersected in pairs to form second connection points 11, thus forming an integrated structure 8 that carries and absorbs waves and energy. In actual implementation, multiple triangular pyramidal units are further spliced ​​and combined. The eight absorbing units 6 are assembled in a symmetrical and rotational manner to form a sound-absorbing cell structure. The first connection points 10 of each absorbing unit 6 are further intersected in pairs to form second connection points 11, so that the whole structure forms an integrated structure 8 that carries and absorbs waves and energy. In actual implementation, the periodic arrangement of the sound-absorbing cells gives the overall structure excellent stability and integrity, and at the same time, it has wave absorption capabilities in different spatial orientations, significantly improving the suppression effect on multi-directional wave energy.

[0043] Optionally, the eight absorbing units 6 are combined to form a large cavity 9, and the through-hole 4 and the large cavity 9 together form a third Helmholtz resonant cavity. In actual implementation, after the eight absorbing units 6 are assembled, a large cavity 9 is formed inside. The large cavity 9 is connected to the outside through the through-hole 4 to form a third Helmholtz resonant cavity, which mainly achieves low-frequency absorption performance. In actual implementation, the volume of the large cavity 9 is significantly larger than that of the medium and small cavities 5, so its resonant frequency is lower, effectively making up for the shortcomings of traditional structures in low-frequency absorption. At the same time, the setting of the large cavity 9 also enhances the energy buffering and absorption effect, so that the structure has excellent energy absorption performance when subjected to impact loads.

[0044] Optionally, the stiffeners 3 are all arranged in a triangular element manner, forming a closed-cell lattice structure after splicing. In actual implementation, the stiffeners 3 are all arranged in an equilateral triangular element manner, forming a closed-cell lattice structure after splicing. The triangle, as the most stable geometric element, enables the lattice structure to exhibit extremely high stability under stress conditions. In actual implementation, the lattice structure effectively prevents local buckling and overall instability, and improves the bending stiffness and compressive strength of the structure. At the same time, the lattice structure also has the advantage of lightweight, making this integrated structure of great application value in fields with high requirements for relative strength and stability, such as aerospace and shipbuilding.

[0045] Optionally, the integrated wave-absorbing and energy-absorbing structure 8 contains three cavities of different sizes and two neck tubes of different lengths, forming three types of Helmholtz resonant cavities to achieve multi-band wave absorption characteristics. In actual implementation, the integrated wave-absorbing and energy-absorbing structure 8 simultaneously includes small, medium, and large cavities, and is equipped with two neck tubes of different lengths. This design can simultaneously form three types of Helmholtz resonant cavities to achieve multi-band wave absorption characteristics. In actual implementation, the small cavity 5 is responsible for high-frequency absorption, the medium cavity 7 is used for mid-frequency absorption, and the large cavity 9 is used for low-frequency absorption. The three work together to achieve wideband coverage. The introduction of neck tubes of different lengths further expands the frequency range, making the overall structure have both wideband wave absorption and energy absorption buffering effects.

[0046] Optionally, the integrated wave-absorbing and energy-absorbing structure 8 contains a large number of cavities. In actual implementation, the integrated wave-absorbing and energy-absorbing structure 8 contains a large number of cavities. Through periodic arrangement and array design, a regular cavity network is formed inside the structure, which not only achieves lightweighting but also avoids material accumulation. In actual implementation, the large number of cavities can uniformly disperse external force impacts, improve energy absorption efficiency, and significantly enhance specific energy absorption performance. At the same time, the cavity structure interacts with the through holes 4, exhibiting good wave absorption characteristics in multiple frequency bands. This design achieves a unified effect of load-bearing, wave absorption, and energy absorption, fully demonstrating the technical advantages of the present invention.

[0047] It should be noted that the following specifies the dimensions and material parameters of the porous, multi-cavity integrated load-bearing, wave-absorbing, and energy-absorbing structure: Figure 1 (a) Taking a cell as an example, its length is 20mm, width is 20mm, height is 20mm, stiffener width is 2mm, stiffener thickness is 2mm, and hole diameter is 1mm. The cells are arranged in a 3x3x3 matrix, resulting in a total length of 60mm, a total width of 60mm, and a total height of 60mm. The cell material is 304 stainless steel, which has a Young's modulus of 200 GPa, a Poisson's ratio of 0.3, and a density of 8000 kg / m³. 3 .

[0048] The aforementioned superstructure floating raft platform with low-frequency vibration reduction characteristics is assembled according to the following steps:

[0049] 1. Use 3D modeling software to establish the smallest assembly unit of the integrated load-bearing, wave-absorbing, and energy-absorbing structure of porous multi-cavity, determine the cell circle parameters through simulation calculation, and complete the cell circle design;

[0050] 2. A 3x3x3 integral cell model is printed using metal additive manufacturing technology;

[0051] After the above-mentioned porous multi-cavity integrated structure array of load-bearing, wave-absorbing, and energy-absorbing materials ( Figure 3 Taking a cell as an example, the energy absorption performance of the cell circle was tested through a force compression experiment. The specific experimental procedure is as follows:

[0052] 1. Install the corresponding tooling fixture on the force testing press and place the cell horizontally on the fixture; 2. First apply a certain force load to tighten and fix the cell on the fixture;

[0053] 3. The press applies the load slowly;

[0054] 4. The force-displacement curve of the press is transmitted to the computer.

[0055] The stress-strain curves obtained from the experiment are as follows: Figure 4 As shown, the overall performance of the cell steadily improves with the increase of the offset in the X-axis direction. When the strain is 558 MPa, the curve tends to flatten out, which proves the effectiveness of the energy absorption performance of the structure.

[0056] Working principle: Its core lies in utilizing the unique structure of the reinforced equilateral triangular sandwich plate. Through the combination of multi-layered, multi-scale cavities and through holes 4, multiple types of Helmholtz resonant cavities are formed. This achieves high specific strength, specific stiffness, and specific energy absorption while also possessing multi-frequency absorption characteristics. First, in its basic configuration, the structure includes an upper plate 2, a lower plate 1, and reinforcing ribs 3 arranged between them. The reinforcing ribs 3 are arranged in an equilateral triangular unit manner, which ensures mechanical stability and spatially divides the cavity between the upper and lower plates 1 into multiple small cavities 5. By uniformly opening through holes 4 on the upper plate 2 and the reinforcing ribs 3, and allowing them to penetrate to the lower plate 1, these through holes 4 and the multiple small cavities 5 work together to form the first type of In a Helmholtz resonant cavity, when sound or electromagnetic waves are incident, the through-hole 4 acts as a neck tube and resonates with the cavity, thus producing an absorption effect at a specific frequency. Because the reinforcing ribs 3 are arranged in triangles, the overall structure forms a closed plate lattice, possessing excellent thin-walled instability resistance. It can effectively suppress local buckling and improve overall load-bearing capacity when subjected to external forces. Furthermore, by splicing multiple reinforced equilateral triangular sandwich plates, an absorbing unit 6 can be further assembled. Four triangular sandwich plates intersect at their three corners to form a triangular pyramid, inside which a medium-sized cavity 7 is formed. Simultaneously, the through-holes 4 on each plate couple with the medium-sized cavity 7, thus forming a second type of Helmholtz resonant cavity. Since the volume of the medium-sized cavity 7 is larger than that of a single small cavity... 5. Therefore, their resonant frequencies differ, enabling them to complement the absorption of the first type of cavity in different frequency bands. Furthermore, multiple triangular pyramidal units can be combined in a rotational and symmetrical manner to form a sound-absorbing cell. The corners of eight absorbing units 6 are staggered and spliced ​​to form an integrated structure for absorbing waves and energy. At this point, a large cavity 9 appears inside the structure, interacting with the external through-hole 4 to form a third type of Helmholtz resonant cavity. Thus, the entire structure simultaneously contains cavities of three different sizes—small, medium, and large—as well as two different lengths of neck tubes, which can produce effective absorption in the low, mid, and high frequency bands, achieving broadband absorption characteristics. At the same time, the structure also has significant advantages in mechanical performance, with triangular reinforcing ribs 3. The arrangement of the components creates a closed-cell lattice structure for the entire sandwich panel, possessing high specific strength and specific stiffness. Under load, this lattice structure effectively disperses the load, improving the overall bending stiffness and buckling resistance of the structure. This avoids the decrease in load-bearing capacity caused by instability in traditional thin-walled structures. Furthermore, the presence of numerous cavities not only provides multi-band wave absorption but also significantly reduces the structure's self-weight, avoiding material accumulation and achieving lightweight design. Therefore, it has significant application prospects in aerospace, shipboard vibration isolation, and other fields requiring both weight reduction and high load-bearing capacity. In practical applications, the structure of this invention can be integrally printed using metal additive manufacturing technology, ensuring that the complex three-dimensional cells and through-hole structures can be integrally formed and assembled in an array.For example, arranging 72 integrated microwave absorption and energy absorption structures into a 3×3×3 cell array can further enhance the performance of the periodic superstructure. Experiments using mechanical loading tests revealed that this structure exhibits excellent energy absorption performance on the stress-strain curve. The curve flattens out when the strain reaches 558 MPa, indicating that the structure can effectively absorb energy and remain stable under high loads. Therefore, this invention not only achieves microwave absorption in different frequency bands but also possesses excellent energy absorption and load-bearing performance, fully demonstrating the technical advantages of the integrated load-bearing-wave absorption-energy absorption design.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Furthermore, the machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be described in detail here.

[0058] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy, characterized in that: It includes an upper plate (2), reinforcing ribs (3) and a lower plate (1). The upper plate (2) is provided with reinforcing ribs (3) on both the upper and lower sides. The reinforcing ribs (3) on the lower side of the upper plate (2) are connected to the upper side of the lower plate (1) to form a cavity between the upper plate (2) and the lower plate (1). The reinforcing ribs (3) act as a grid core to divide the cavity into multiple small cavities (5). Multiple through holes (4) are evenly provided on the upper plate (2) and the reinforcing rib (3) and extend to the lower plate (1). The through holes (4) and the small cavity (5) together form the first Helmholtz resonant cavity.

2. The porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy according to claim 1, characterized in that: The reinforcing ribs (3) are arranged in an equilateral triangle structure. The reinforcing ribs (3) on the upper side of the upper plate (2) are provided with deep holes. The depth of the deep holes is greater than the depth of the holes in the panel, which is used to adjust the absorption frequency of the first Helmholtz resonant cavity.

3. The porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy according to claim 1, characterized in that: Multiple reinforced equilateral triangular sandwich panels are spliced ​​together, and the three corners of every four reinforced equilateral triangular sandwich panels intersect in pairs to form the first connection point (10), and form a triangular pyramid. The triangular pyramid forms a medium-sized cavity (7) inside, and the through hole (4) and the medium-sized cavity (7) together form a second Helmholtz resonant cavity.

4. The porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy according to claim 1, characterized in that: Multiple triangular pyramids are spliced ​​together to form eight wave-absorbing units (6), and the wave-absorbing units (6) are combined into sound-absorbing cells by rotation and symmetry; The first connection point (10) of the eight wave-absorbing units (6) further intersects in pairs to form a second connection point (11), thereby forming an integrated structure (8) that carries wave absorption and energy absorption.

5. The porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy according to claim 4, characterized in that: The eight absorbing units (6) are combined to form a large cavity (9), and the through hole (4) and the large cavity (9) together form a third Helmholtz resonant cavity.

6. The porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy according to claim 1, characterized in that: The reinforcing ribs (3) are all arranged in a triangular unit manner, and after splicing, they form a closed plate grid lattice structure.

7. The porous multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy according to claim 4, characterized in that: The integrated structure for absorbing waves and energy (8) contains three cavities of different sizes and two neck tubes of different lengths, which can form three types of Helmholtz resonant cavities to achieve multi-band wave absorption characteristics.

8. The porous, multi-cavity integrated structure for bearing, absorbing waves, and absorbing energy according to claim 4, characterized in that: The integrated structure for absorbing waves and energy (8) contains a large number of cavities.

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