Integrated multi-stage filtering energy dissipation buffer support

Abstract

This invention discloses an integrated multi-stage filtering energy dissipation buffer support, belonging to the fields of overload signal filtering for penetration fuses and vibration reduction and isolation technology for engineering structures. The support is a seamless, integrated structure comprising an upper end plate, a lower end plate, and a filtering energy dissipation body. The filtering energy dissipation body includes multiple rigid bearing blocks arranged sequentially, with clearance gaps between adjacent rigid bearing blocks and integrally connected by elastic ribs. When not subjected to impact, the elastic ribs transmit force independently; after impact, the elastic ribs deform to absorb and filter energy. Once the clearance gaps are eliminated, the rigid bearing blocks directly contact and transmit the main load. This invention, through a multi-stage response mechanism of "gap pre-storage – elastic rib filtering and energy absorption – rigid body contact bearing," effectively filters out stress wave clutter interference during penetration, improving the accuracy of overload signal reading and the structural service stability.

Description

Technical Field

[0001] This invention relates to the fields of overload signal filtering of penetration fuses and vibration damping and buffering technology of engineering structures, and in particular to an integrated multi-stage filtering energy dissipation buffer support. Background Technology

[0002] When a high-speed penetration fuze is in operation, the signal collected by the overload sensor is not only affected by the penetration impact overload, but also by stress waves and clutter interference from the fuze connection structure, resulting in signal mixing and adhesion problems that seriously affect target identification accuracy. Traditional filtering structures mostly adopt a split-type, single-stiffness design, which is difficult to adapt to the extreme mechanical conditions of high-speed penetration and has significant technical defects.

[0003] Traditional single-stiffness structures have a fixed response mode and lack graded control capabilities, making it impossible to achieve a multi-level coordinated response of "initial buffering and energy absorption - mid-term clutter filtering - late-term stable load bearing". In the early stage of penetration, the structure's buffering capacity is insufficient, failing to effectively dissipate high-frequency impact energy and easily causing sensor overload saturation distortion. In the mid-stage of penetration, the fixed stiffness is insufficient to attenuate the mid-frequency clutter induced by structural vibration and stress waves, failing to separate effective signals from interference noise. In the late stage of penetration, the structure's stability is insufficient, failing to stably bear the residual load, resulting in large signal fluctuations and significantly reducing the accuracy of interpreting target information such as the number of penetration layers and penetration depth.

[0004] Traditional modular structures are assembled from multiple parts, resulting in numerous assembly gaps and connection interfaces. Under high-speed impact conditions, these modular parts are prone to relative displacement, frictional collisions, and local resonance, introducing additional assembly clutter and further contaminating the effective signal. Simultaneously, the stress transmission in modular structures is discontinuous, stress concentration easily occurs at interfaces, and impact resistance is poor. Repeated impacts can easily lead to loosening, deformation, and fatigue damage, making the structural reliability and service life insufficient to meet the requirements of high-intensity penetration conditions.

[0005] Furthermore, traditional machining processes such as turning, milling, and grinding can only produce simple and regular structures, and cannot achieve integrated fabrication of complex topologies, hierarchical gaps, microtextures, and other refined structures. This makes it difficult to achieve the combined functions of hierarchical energy consumption and precise filtering through structural optimization. At the same time, the cumulative error from separate machining and assembly is large, resulting in poor structural consistency. In batch applications, the filtering and buffering performance is unstable, making it unsuitable for the requirements of high-precision fuze sensing systems. Summary of the Invention

[0006] To address the issues of fixed response modes in traditional single-stiffness structures and numerous assembly gaps and connection interfaces in traditional split structures, this invention provides an integrated multi-level filtering energy-dissipating buffer support. Through a multi-level response mechanism of "gap pre-storage - elastic rib filtering and energy absorption - rigid body contact bearing," it achieves the synergistic functions of clutter filtering, energy absorption, and stable bearing.

[0007] The technical solution of the present invention to solve the above problems is: To achieve the above objectives, the present invention provides an integrated multi-stage filtering energy dissipation buffer support, which is an integral, seamless structure, including an upper end plate, a lower end plate, and a filtering energy dissipation body integrally formed between the upper end plate and the lower end plate.

[0008] The filtering energy dissipation body includes multiple rigid bearing blocks arranged in sequence. A clearance gap is provided between any two adjacent rigid bearing blocks, and any two adjacent rigid bearing blocks are integrally connected by at least one elastic rib. When not subjected to impact load, the clearance gap maintains a preset distance, and the elastic rib serves as the sole force transmission path. After being subjected to impact load, the elastic rib undergoes elastic deformation to absorb energy and filter out high-frequency noise. When the deformation reaches the preset distance of the clearance gap, the two adjacent rigid bearing blocks directly contact each other to transmit the main load. The filtering energy dissipation body, the upper end plate, and the lower end plate are integrally formed in one piece using additive manufacturing.

[0009] As a preferred embodiment, the rigid bearing block is a sphere, and the elastic rib is an arc-shaped elastic rib arranged around the outside of the sphere. The arc-shaped elastic rib and the sphere are integrally connected to form a spring-sphere integrated structure. When not under load, a clearance gap of 0.1~0.5mm is reserved between the outer wall of the sphere and the inner wall of the arc-shaped elastic rib.

[0010] As another preferred embodiment, the rigid bearing block is a segmented cuboid, and the elastic rib is a semi-circular connecting rib disposed on the same side of two adjacent segments of the cuboid. The segmented cuboid and the semi-circular connecting rib are integrally formed to constitute a single-sided interlocking multi-level energy-dissipating structure. A clearance gap of 0.1~0.3mm is provided between two adjacent segments of the cuboid, and the cross-sectional diameter of the semi-circular connecting rib is 1~3mm. The ratio of the height to the cross-sectional dimension of the segmented cuboid is 1:1~3:1, and the angle between the axis of the semi-circular connecting rib and the end face of the segmented cuboid is 90°±25°.

[0011] In another preferred embodiment, the rigid bearing block is a segmented cube, and the elastic ribs are annular connecting ribs symmetrically distributed on the four sides of adjacent segments of the cube. The segmented cubes and the annular connecting ribs are integrally formed to constitute a stable four-sided interlocking contact structure. A clearance gap of 0.1~0.3mm is provided between adjacent segments of the cube, and the cross-sectional dimensions and distribution positions of the annular connecting ribs on the four sides are completely symmetrical. The center distance of the annular connecting ribs on the four sides from the end face of the segmented cube is equal, and the angle between the axis of the annular connecting rib and the end face of the segmented cube is 90°±25°.

[0012] Preferably, the surface roughness Ra of the filter energy-consuming body is 1~20μm.

[0013] Preferably, the additive manufacturing method is selective laser sintering (SLS) or selective laser melting (SLM); the buffer support is integrally formed using polymer composite powder or metal alloy powder as raw material through the selective laser sintering (SLS) or selective laser melting (SLM) process. The polymer composite powder is any one of PEKK composite powder, PEEK composite powder, or modified nylon composite powder; the metal alloy powder is any one of TC4 titanium alloy powder, NiTi nickel-titanium shape memory alloy powder, or stainless steel alloy powder.

[0014] Advantages of this invention: 1. This invention employs a multi-stage response mechanism of "gap pre-storage - elastic rib filtering and energy absorption - rigid body contact bearing". In the initial stage, the elastic rib transmits force independently, using its elastic deformation to absorb high-frequency impact energy and filter out stress wave clutter. When the elastic rib deforms to the point where the clearance is eliminated, the rigid bearing block directly contacts to form a high-rigidity force transmission path, realizing the temporal separation and synergistic cooperation of "flexible filtering" and "rigid bearing", perfectly adapting to the filtering requirements of overload signals under all working conditions of penetration fuses.

[0015] 2. The present invention is an integral seamless topology structure with no assembly gaps or connecting nodes, which eliminates the loosening failure and stress concentration problems of traditional split structures from the root. At the same time, it avoids the introduction of additional assembly noise due to relative displacement and friction collision of split structures under high-speed impact.

[0016] 3. This invention uses additive manufacturing (3D printing) to form a one-time molding process, which can realize the integrated preparation of complex topologies, micro gaps and other fine structures without the need for subsequent secondary processing. It has high dimensional accuracy, good structural consistency and stable filtering and buffering performance during mass production.

[0017] 4. The four-sided ring-lock structure of the present invention solves the problem of buckling instability that easily occurs when a single-sided ring-lock structure is subjected to force by symmetrically distributed ring ribs, ensuring that the end faces of the segmented cube are always in parallel contact and improving the stability of the main load transmission. Attached Figure Description

[0018] Figure 1 These are the front and left views of the spring-ball integrated structure according to an embodiment of the present invention; Figure 2 These are the front and side views of a single-sided ring-interlocked multi-stage energy dissipation structure according to an embodiment of the present invention; Figure 3 These are the front and side views of the four-sided interlocking stable contact structure according to an embodiment of the present invention; Figure 4 This is a partially enlarged view of the gap between the sphere and the helical skeleton in the spring-ball structure of an embodiment of the present invention; Figure 5 This is a diagram showing the boundary condition settings for the spring-ball structure in an embodiment of the present invention. Figure 6 This is a graph showing the acceleration curve of point A in the spring-ball structure according to an embodiment of the present invention. Figure 7 This is a diagram showing the boundary conditions for a four-sided ring-locked stable contact structure according to an embodiment of the present invention. Figure 8 This is an acceleration curve of point B in the four-sided interlocking stable contact structure of this invention embodiment; Figure 9 This is a force curve diagram of point C of the four-sided interlocking stable contact structure in an embodiment of the present invention.

[0019] In the diagram: Upper plate 1, Lower plate 2, Spring-ball filter energy dissipation body 3, Arc-shaped elastic rib 31, Sphere 32, Single-sided ring-lock filter energy dissipation body 4, Segmented cuboid 42, Single-sided ring-connecting rib 41, Four-sided ring-lock filter energy dissipation body 5, Segmented cube 52, Four-sided ring-connecting rib 51. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0021] The present invention provides an integrated multi-stage filtering energy-dissipating buffer support, which is an integral structure without splicing, including an upper end plate 1, a lower end plate 2, and a filtering energy-dissipating body integrally formed between the upper end plate 1 and the lower end plate 2.

[0022] The filtering energy dissipation body includes multiple rigid bearing blocks arranged in sequence. A clearance gap is provided between any two adjacent rigid bearing blocks, and any two adjacent rigid bearing blocks are integrally connected by at least one elastic rib. When not subjected to impact load, the clearance gap maintains a preset distance, and the elastic rib serves as the sole force transmission path. After being subjected to impact load, the elastic rib undergoes elastic deformation to absorb energy and filter out high-frequency noise. When the deformation reaches the preset distance of the clearance gap, the two adjacent rigid bearing blocks directly contact each other to transmit the main load. The filtering energy dissipation body, the upper end plate 1, and the lower end plate 2 are integrally formed in one piece using additive manufacturing.

[0023] The rigid bearing block of the present invention is embodied in a sphere 32, a segmented cuboid 42 or a segmented cube 52 in a specific embodiment; the elastic rib is embodied in an arc-shaped elastic rib 31, a single-sided annular connecting rib 41 or a four-sided annular connecting rib 51 in a specific embodiment.

[0024] Example Example 1: Spring-ball integrated structure Reference Figure 1 , Figure 4 The support in this embodiment includes an upper end plate 1, a lower end plate 2, and an integrally formed spring-ball filter energy dissipation body 3. The spring-ball filter energy dissipation body 3 is integrally formed by an arc-shaped elastic rib 31 and a ball 32, without splicing or assembly parts, and is formed in one piece through additive manufacturing (3D printing). The arc-shaped elastic rib 31 is generally wavy, with a ball 32 set in each wave. The ball 32 is connected to one side of the arc-shaped elastic rib 31 in the wave it is in, and there is a clearance on the other side. The ball 32 at the end is connected to the upper end plate 1 and the lower end plate 2 respectively, and there is a clearance with the arc-shaped elastic rib 31 closest to it.

[0025] When not subjected to impact, there is a 0.2mm clearance between the sphere 32 and the arc-shaped elastic rib 31. At this time, the arc-shaped elastic rib 31 can undergo elastic deformation to absorb impact energy and filter out high-frequency noise. After being subjected to impact load, the clearance gradually disappears, and the sphere 32 and the arc-shaped elastic rib 31 come into direct contact to form a rigid load-bearing structure to transmit the main penetrating load.

[0026] Reference Figure 5 , Figure 6 In this embodiment, under a periodic displacement load with an amplitude of 0.3 mm and a period of 2 ms, the acceleration response curve at point A of the spring-ball integrated structure exhibits a significant multi-stage filtering energy dissipation effect: In the initial low-amplitude loading stage, the clearance gap between the arc-shaped elastic rib 31 and the sphere 32 has not yet been eliminated, and the arc-shaped elastic rib 31 undergoes elastic deformation, absorbing the stress wave oscillation energy and filtering out high-frequency noise. The corresponding acceleration response curve shows no large peaks, only slight fluctuations; when the displacement reaches the clearance elimination threshold, the arc-shaped elastic rib 31 and the sphere 32 come into direct contact, and the overall stiffness of the structure is significantly improved. This achieves a smooth transition from flexible energy dissipation to rigid load bearing, resulting in a clear main load peak on the acceleration curve. During subsequent cyclic loading, the arc-shaped elastic rib 31 remains in continuous contact with the sphere 32, and the main impact load is stably transmitted through the sphere 32. At the same time, the arc-shaped elastic rib 31 continues to absorb residual stress wave energy through repeated deformation. The acceleration curve exhibits the characteristics of "clear peak, smooth transition, and no sticky clutter," verifying the multi-level response mechanism of the structure, which consists of "low-amplitude filtering and energy absorption, medium-amplitude stiffness transition, and high-amplitude stable load bearing." This effectively filters out stress wave interference during the penetration process and improves the accuracy of overload signal reading.

[0027] Example 2: Single-sided ring-locked multi-stage energy dissipation structure Reference Figure 2 The support in this embodiment includes an upper end plate 1, a lower end plate 2, and an integrally formed single-sided ring-shaped filter energy dissipation body 4. The single-sided ring-shaped filter energy dissipation body 4 is integrally formed from four segmented cuboids 42 and single-sided annular connecting ribs 41. The segmented cuboids 42 at both ends are connected to the upper end plate 1 and the lower end plate 2, respectively. The three single-sided annular connecting ribs 41 are staggered on both sides of the single-sided ring-shaped filter energy dissipation body 4. A clearance gap of 0.2mm is reserved between adjacent segmented cuboids 42. The annular connecting ribs are semi-circular ring structures with a cross-sectional diameter of 2mm and are integrally printed with the support in one piece.

[0028] In the initial stage of impact loading, the one-sided annular connecting rib 41 undergoes elastic deformation, absorbing energy and filtering out clutter. Once the annular rib has deformed to its limit, the end faces of the segmented cuboid 42 directly contact each other, transferring the main load. This structure uses annular ribs instead of spherical contact, avoiding shear force concentration and simplifying the structural forming process. In this embodiment, the ratio of the height to the cross-sectional dimension of the segmented cuboid 42 is 2:1, and the angle between the axis of the one-sided annular connecting rib 41 and the end face of the segmented cuboid 42 is 90°, ensuring that the annular rib can effectively deform and absorb energy during impact, while maintaining a smooth force transmission path upon end-face contact.

[0029] Example 3: Four-sided interlocking stable contact structure Reference Figure 3 The support in this embodiment includes an upper end plate 1, a lower end plate 2, and an integrally formed four-sided ring-interlocking filter energy dissipation body 5. The four-sided ring-interlocking filter energy dissipation body 5 is integrally formed from four segmented cubes 52 and four-sided ring-connecting ribs 51. The segmented cubes 52 at both ends are connected to the upper end plate 1 and the lower end plate 2 respectively. The ring-connecting ribs are symmetrically distributed on the four sides of the cube. The cross-sectional dimensions and distribution positions of the ring-connecting ribs on each side are completely symmetrical. A clearance gap of 0.1mm is reserved between adjacent segmented cubes 52.

[0030] Reference Figure 7 , Figure 8 , Figure 9 In this embodiment, under a periodic displacement load with an amplitude of 0.8 mm and a period of 0.5 ms, the acceleration response curve at point B of the four-sided ring-connected stable contact structure exhibits significant multi-level filtering characteristics: In the initial stage of loading, the acceleration signal is accompanied by high-frequency oscillating noise, corresponding to the elastic deformation of the four-sided ring connecting rib 51, which absorbs stress wave energy and filters out noise; as the displacement load is continuously applied, the end faces of the segmented cube 52 contact and transmit the main load, and the acceleration curve forms a clear main load peak, with high-frequency noise significantly attenuated, indicating that the structure achieves a smooth transition from flexible energy-dissipating filtering to rigid stable bearing.

[0031] The stress curve at point C further verifies the multi-stage energy dissipation effect of the structure: In the initial stage of loading, the elastic deformation of the four-sided annular connecting ribs 51 absorbs energy, and the load curve shows a continuously rising elastic response; when the segmented end faces come into contact, the load is quickly transferred to the main bearing stage, forming a sharp main load peak; in the unloading stage, the curve returns to a low-amplitude fluctuation state, indicating that the repeated deformation of the annular ribs effectively dissipates the residual stress wave energy, avoids the stress wave adhesion phenomenon, and realizes the multi-stage filtering and stable bearing synergy function of penetrating overload signals.

[0032] Based on a single-sided ring-lock structure, this structure completely solves the problem of structural buckling during stress through symmetrically distributed annular ribs 51, ensuring that the end faces of the segmented cube 52 are always in parallel contact, improving the stability of the main load transmission, while retaining the deformation energy absorption and filtering function of the annular ribs. In this embodiment, the center distance of the annular connecting ribs 51 on the four sides from the end face of the segmented cube 52 is equal, and the angle between the axis of the annular connecting ribs 51 and the end face of the segmented cube 52 is 90°, ensuring that the structure does not buckle and that the end faces are in parallel contact during stress.

[0033] In the above embodiments, the buffer support can be made entirely of polymer composite powder or metal alloy powder. The polymer composite powder can be selected from any one of PEKK composite powder, PEEK composite powder, or modified nylon composite powder; the metal alloy powder can be selected from any one of TC4 titanium alloy powder, NiTi nickel-titanium shape memory alloy powder, or stainless steel alloy powder. The support is 3D printed as a single unit using selective laser sintering (SLS) or selective laser melting (SLM) additive manufacturing processes.

[0034] In the above embodiments, the surface roughness Ra of the filter energy-dissipating body is 1~20μm, and it can be used directly after 3D printing without subsequent secondary processing. This roughness range ensures printing accuracy without requiring additional post-processing steps, simplifying the manufacturing process and reducing costs.

[0035] In summary, the three integrated 3D printed structural variants of this invention achieve filtering, energy dissipation, and stable load-bearing functions for the overload signal of the penetration fuze through a multi-level response mechanism of "gap pre-storage - first flexible then rigid". At the same time, they solve the problems of shear failure of traditional spring-ball structures and easy buckling of single-sided ring structures. The structures have strong integrity and high process feasibility, and have important engineering application value.

[0036] The above description is merely an embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related system fields, are similarly included within the scope of protection of the present invention.

Claims

1. An integrated multi-stage filtering energy dissipation buffer support, characterized in that, It is an integral structure without splicing, including an upper end plate (1), a lower end plate (2) and a filter energy dissipation body integrally formed between the upper end plate (1) and the lower end plate (2); The filtering energy dissipation body includes multiple rigid bearing blocks arranged in sequence, with a clearance gap between any two adjacent rigid bearing blocks, and any two adjacent rigid bearing blocks are integrally connected by at least one elastic rib. When not subjected to impact load, the clearance gap maintains a preset spacing, and the elastic rib serves as the only force transmission path; After being subjected to an impact load, the elastic rib undergoes elastic deformation to absorb energy and filter out high-frequency noise. When the deformation reaches the preset spacing of the clearance gap, the two adjacent rigid bearing blocks come into direct contact to transfer the main load. The filter energy-consuming body, the upper end plate (1) and the lower end plate (2) are integrally formed in one piece by additive manufacturing.

2. The integrated multi-stage filtering energy dissipation buffer support according to claim 1, characterized in that, The rigid bearing block is a sphere (32), and the elastic rib is an arc-shaped elastic rib (31) arranged around the outside of the sphere (32). The arc-shaped elastic rib (31) and the sphere (32) are integrally connected to form a spring-sphere integrated structure (3). When not under load, a clearance gap of 0.1~0.5mm is reserved between the outer wall of the sphere (32) and the inner wall of the arc-shaped elastic rib (31).

3. The integrated multi-stage filtering energy dissipation buffer support according to claim 1, characterized in that, The rigid bearing block is a segmented cuboid (42), and the elastic rib is a semi-circular connecting rib (41) set on the same side of two adjacent segmented cuboids (42). The segmented cuboids (42) and the semi-circular connecting rib (41) are integrally formed to form a single-sided ring-locked multi-level energy dissipation structure (4). There is a clearance gap of 0.1~0.3mm between two adjacent segmented cuboids (42), and the cross-sectional diameter of the semi-circular connecting rib (41) is 1~3mm.

4. The integrated multi-stage filtering energy dissipation buffer support according to claim 1, characterized in that, The rigid bearing block is a segmented cube (52), and the elastic rib is an annular connecting rib (51) symmetrically distributed on the four sides of the two adjacent segmented cubes (52). The segmented cubes (52) and the annular connecting ribs (51) are integrally formed to form a four-sided ring-interlocked stable contact structure (5). There is a clearance gap of 0.1~0.3mm between the two adjacent segmented cubes (52), and the cross-sectional dimensions and distribution positions of the annular connecting ribs (51) on the four sides are completely symmetrical.

5. The integrated multi-stage filtering energy dissipation buffer support according to claim 3, characterized in that, The ratio of the height to the cross-sectional dimension of the segmented cuboid (42) is 1:1 to 3:1, and the angle between the axis of the semi-circular connecting rib (41) and the end face of the segmented cuboid (42) is 90°±25°.

6. The integrated multi-stage filtering energy dissipation buffer support according to claim 4, characterized in that, The center of the annular connecting rib (51) on all four sides is equidistant from the end face of the segmented cube (52), and the angle between the axis of the annular connecting rib (51) and the end face of the segmented cube (52) is 90°±25°.

7. The integrated multi-stage filtering energy dissipation buffer support according to claim 1, characterized in that, The surface roughness Ra of the filter energy dissipation body is 1~20μm.

8. The integrated multi-stage filtering energy dissipation buffer support according to claim 1, characterized in that, The additive manufacturing method is selective laser sintering (SLS) or selective laser melting (SLM); the buffer support is integrally formed using polymer composite powder or metal alloy powder as raw materials through the selective laser sintering (SLS) or selective laser melting (SLM) process.

9. The integrated multi-stage filtering energy dissipation buffer support according to claim 8, characterized in that, The polymer composite powder is any one of PEKK composite powder, PEEK composite powder, or modified nylon composite powder; the metal alloy powder is any one of TC4 titanium alloy powder, NiTi nickel-titanium shape memory alloy powder, or stainless steel alloy powder.

10. The integrated multi-stage filtering energy dissipation buffer support according to claim 1, characterized in that, The clearance is 0.1~0.5mm.

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