A lightweight metamaterial structure that transmits static and suppresses dynamic

Abstract

This invention discloses a lightweight metamaterial structure for unidirectional static load transfer and dynamic load suppression, relating to the field of vibration reduction technology for engineering structures. It includes a bidirectional corrugated plate frame, longitudinal guide shafts, a local resonant frame, longitudinal spring modules, longitudinal sliding modules, and transverse spring modules. The bidirectional corrugated plate frame has a first cavity, within which the local resonant frame is suspended. The transverse spring modules are connected to the local resonant frame. A longitudinal guide shaft is located on each side of the local resonant frame, connected to the bidirectional corrugated plate frame and slidably connected to the longitudinal sliding modules. A longitudinal spring module is located on each of the other two sides of the local resonant frame, with its ends connected to the local resonant frame and the bidirectional corrugated plate frame, respectively. This invention achieves lightweight design while simultaneously satisfying effective static load transfer and efficient dynamic load suppression in both the longitudinal and transverse directions.

Description

Technical Field

[0001] This invention belongs to the field of vibration reduction technology for engineering structures, and more specifically, it relates to a lightweight metamaterial structure that transmits static energy and suppresses dynamic energy in the same direction. Background Technology

[0002] In industrial and engineering applications, effective vibration control is crucial for the stable operation of equipment and the safety of structures, especially in fields such as aerospace, rail transportation, and machinery. These fields require structures capable of withstanding static loads while simultaneously suppressing vibrations caused by dynamic loads. However, existing technologies often struggle to achieve an efficient combination of static load transfer and dynamic load suppression, presenting certain technical bottlenecks.

[0003] Corrugated plates are a typical lightweight load-bearing structure, widely used in engineering practice due to their excellent load-bearing capacity in the cross-sectional direction. However, traditional corrugated plate structures are mainly used to bear static loads, and usually lack effective means to suppress dynamic loads caused by vibration. Localized resonant metamaterials have become a research hotspot in the field of vibration control in recent years. By introducing local oscillators into the matrix structure to form specific frequency band gaps, they can effectively attenuate the propagation of vibration waves.

[0004] The invention patent with publication number CN 110654072 B proposes to stack sawtooth-shaped partitions between multiple corrugated plates to further improve the structure's compressive strength in the cross-sectional direction. The invention patent with publication number CN 112324827A proposes to embed periodically arranged circular resonant units in a double-layer pyramid structure to generate a wideband gap. The invention patents with publication numbers CN114550682 A, CN 116221313 A, and CN 114718974 A propose to achieve vibration suppression effects in multiple directions through cavities, particles, and supporting beams, respectively. Although the above technologies improve the static load transfer and dynamic load suppression performance of the structure to some extent, none of these structures can simultaneously meet the requirements of static load transfer and dynamic load suppression in multiple directions, making them difficult to apply effectively in practical engineering environments with multi-directional excitation.

[0005] To meet the requirements of static load transfer and dynamic load suppression in multiple directions of engineering structures, it is urgent to design a new type of lightweight metamaterial structure that can simultaneously meet the requirements of multi-directional "static load transfer and dynamic load suppression" and keep the directions of static and dynamic loads consistent. This has broad application potential in engineering practice. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a lightweight metamaterial structure that can transmit static loads and suppress dynamic loads in the same direction. This structure is based on a corrugated plate design and utilizes the high specific strength of the corrugated plate and the bandgap characteristics of the bidirectional local oscillator to achieve lightweighting while simultaneously satisfying the effective transmission of static loads and the efficient suppression of dynamic loads in both the longitudinal and transverse directions.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a lightweight metamaterial structure for "static transmission and dynamic suppression" in the same direction, including a bidirectional corrugated plate frame, a longitudinal guide shaft, a local resonant frame, a longitudinal spring module, a longitudinal sliding module, and a transverse spring module; the bidirectional corrugated plate frame has a first cavity that runs through the front and back, the local resonant frame is suspended in the first cavity, the local resonant frame has a second cavity, the transverse spring module is suspended in the second cavity, a longitudinal guide shaft is provided on each side of the local resonant frame, the longitudinal guide shaft is fixedly connected to the bidirectional corrugated plate frame, the two longitudinal guide shafts are symmetrically arranged, each longitudinal guide shaft is slidably connected to a longitudinal sliding module, the longitudinal sliding module, the local resonant frame and the transverse spring module slide together along the longitudinal guide shaft; a longitudinal spring module is suspended on each of the other two sides of the local resonant frame, the two longitudinal spring modules are symmetrically arranged, the longitudinal spring module is located in the first cavity, the two ends of the longitudinal spring module are respectively connected to the local resonant frame and the bidirectional corrugated plate frame, when the local resonant frame moves to one side, it will compress the longitudinal spring module on the same side and stretch the longitudinal spring module on the other side;

[0008] Preferably, the first cavity is composed of a central hole and two side holes connected together. The central hole is a rectangular hole, and the side holes are trapezoidal holes. The two side holes are symmetrically arranged on opposite sides of the central hole, and the two ends of the guide shaft are respectively connected to the two side edges of the rectangular hole.

[0009] Preferably, trapezoidal grooves are provided on the upper and lower surfaces and the front and rear surfaces of the bidirectional corrugated plate frame.

[0010] Preferably, the transverse spring module includes a first transverse spring, a second transverse spring, a transverse guide shaft, a transverse linear bearing, and a cylindrical oscillator; both ends of the transverse guide shaft pass through the local resonance frame and are fixedly connected to the longitudinal sliding module; the transverse linear bearing is slidably connected to the transverse guide shaft; the cylindrical oscillator is fixedly connected to the transverse linear bearing; both the first and second transverse springs are slidably connected to the transverse guide shaft; one end of the first transverse spring is connected to one side of the transverse linear bearing, and the other end is connected to the inner surface of the second cavity; one end of the second transverse spring is connected to the other side of the transverse linear bearing, and the other end is connected to the other inner surface of the second cavity; both the first and second transverse springs are compression springs and are symmetrically arranged about the transverse linear bearing.

[0011] Preferably, the longitudinal spring module includes a second longitudinal spring, a spring bracket, and a set screw. Each end of the second longitudinal spring is detachably connected to a spring bracket, and the two spring brackets are fixedly connected to the bidirectional corrugated plate frame and the local resonance frame respectively by set screws.

[0012] Preferably, the spring bracket has three L-shaped pressure blocks along its circumference, which hold the end of the second longitudinal spring in place. The second longitudinal spring is a compression spring.

[0013] Preferably, the longitudinal sliding module includes a longitudinal linear bearing and a bearing housing. The longitudinal linear bearing is slidably connected to the longitudinal guide shaft, the longitudinal linear bearing is mounted on the bearing housing, and the bearing housing is fixedly connected to the local resonance frame.

[0014] The beneficial effects of adopting the above technical solution are as follows:

[0015] 1. Synergy between static load transfer and dynamic load suppression. A transverse linear bearing and a cylindrical oscillator constitute a transverse mass module. A first transverse spring and a second transverse spring constitute a transverse damping spring module. Together, the transverse mass module and the transverse damping spring module form a transverse damping unit, which achieves transverse vibration reduction and suppression. A local resonant frame, a longitudinal sliding module, a transverse spring module, and two spring supports connected to the local resonant frame together constitute a longitudinal mass module. A first longitudinal spring and a second longitudinal spring constitute a longitudinal damping spring module. Together, the longitudinal mass module and the longitudinal damping spring module form a longitudinal damping unit, which achieves longitudinal vibration reduction and suppression. This invention utilizes a bidirectional corrugated plate frame to effectively transfer transverse and longitudinal static loads, and utilizes transverse and longitudinal damping units to efficiently suppress dynamic loads. It achieves the "static load transfer and dynamic load suppression" function in both transverse and longitudinal directions, meeting performance requirements under multi-directional loads and is suitable for complex vibration environments.

[0016] 2. Lightweight and modular structural design. The bidirectional corrugated plate frame in this invention adopts a structure similar to a corrugated plate, with a first cavity in the middle and trapezoidal grooves on all four outer sides. Each module is installed in the first cavity, which reduces the weight and manufacturing cost of the overall structure while ensuring the "static transmission and dynamic suppression" function, making it suitable for scenarios with strict weight restrictions, such as the aerospace field.

[0017] 3. Simple assembly and strong applicability. The components of this invention adopt a modular design, and the assembly methods between parts can be interference fit or threaded connection, which ensures the reliability and accuracy of installation, while also facilitating disassembly and maintenance. This structure can adapt to customized needs in different scenarios and can be widely used in industrial, scientific research and precision equipment fields with high vibration control requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure in the diagram;

[0021] Figure 4 This is a schematic diagram of a two-way localized resonance structure;

[0022] Figure 5 This is a schematic diagram of the state of a bidirectional localized resonance structure under lateral excitation.

[0023] Figure 6 This is a schematic diagram of the state of a bidirectional localized resonance structure under longitudinal excitation.

[0024] Figure 7 This is a schematic diagram of the local resonant metamaterial beam with unidirectional "static transmission and motion suppression" of the present invention.

[0025] In the diagram: 1. Two-way corrugated plate frame; 2. Longitudinal sliding module; 2-1. Longitudinal linear bearing; 2-2. Bearing seat; 3. Longitudinal guide shaft; 4. Nut; 5. Local resonance frame; 6-1. First longitudinal spring; 6-2. Second longitudinal spring; 7-1. First transverse spring; 7-2. Second transverse spring; 8. Transverse guide shaft; 9. Transverse linear bearing; 10. Cylindrical oscillator; 11. Spring bracket; 12. Set screw. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] like Figure 1-4As shown, the unidirectional "static transmission and dynamic suppression" lightweight metamaterial structure includes a bidirectional corrugated plate frame 1, a longitudinal guide shaft 3, a local resonant frame 5, a longitudinal spring module, a longitudinal sliding module 2, and a transverse spring module. The bidirectional corrugated plate frame 1 has a first cavity that extends through the front and rear. The first cavity is formed by a central hole and two connected side holes. The central hole is rectangular, and the side holes are trapezoidal, symmetrically arranged on opposite sides of the central hole. Trapezoidal grooves are provided on the top and bottom surfaces and the front and rear surfaces of the bidirectional corrugated plate frame 1 to further reduce weight. The local resonant frame 5 is suspended within the first cavity. A second cavity is provided within the local resonant frame 5, and the transverse spring module is suspended within the second cavity. The transverse spring module includes a first transverse spring 7-1, a second transverse spring 7-2, a transverse guide shaft 8, a transverse linear bearing 9, and a cylindrical oscillator 10. The transverse guide shaft 8 has threads at both ends, passes through the local resonant frame 5, and is screwed into the longitudinal sliding module. A transverse linear bearing 9 is slidably sleeved onto a transverse guide shaft 8, and a cylindrical oscillator 10 is interference-fitted onto the transverse linear bearing 9. Both a first transverse spring 7-1 and a second transverse spring 7-2 are slidably sleeved onto the transverse guide shaft 8. One end of the first transverse spring 7-1 is connected to one side of the transverse linear bearing 9, and the other end is connected to the inner surface of the second cavity. One end of the second transverse spring 7-2 is connected to the other side of the transverse linear bearing 9, and the other end is connected to the other inner surface of the second cavity. Both the first transverse spring 7-1 and the second transverse spring 7-2 are compression springs and are symmetrically arranged about the transverse linear bearing 9.

[0028] A longitudinal guide shaft 3 is provided on each side of the local resonance frame 5. The longitudinal guide shaft 3 is fixedly connected to the bidirectional corrugated plate frame 1 by nuts 4. The two longitudinal guide shafts 3 are symmetrically arranged, and each longitudinal guide shaft 3 is slidably connected to a longitudinal sliding module 2. The longitudinal sliding module 2 includes a longitudinal linear bearing 2-1 and a bearing seat 2-2. The longitudinal linear bearing 2-1 is slidably connected to the longitudinal guide shaft 3 and is mounted on the bearing seat 2-2. The longitudinal sliding module 2, the local resonance frame 5, and the transverse spring module slide together along the longitudinal guide shaft 3.

[0029] A longitudinal spring module is suspended on each of the other two sides of the local resonant frame 5. The two longitudinal spring modules are symmetrically arranged and located in the first cavity. The two ends of the longitudinal spring module are connected to the local resonant frame 5 and the bidirectional corrugated plate frame 1, respectively. When the local resonant frame 5 moves to one side, it compresses the longitudinal spring module on the same side and stretches the longitudinal spring module on the other side.

[0030] Specifically, the longitudinal spring module includes a second longitudinal spring 6-2, a spring bracket 11, and a set screw 12. The spring bracket 11 has three L-shaped pressure blocks along its circumference, which hold a ring of spring at the end of the second longitudinal spring 6-2 in place, thus allowing the second spring 6-2 to be easily removed from the spring bracket 11. The two spring brackets 11 are fixedly connected to the bidirectional corrugated plate frame 1 and the localized resonance frame 5 respectively via the set screw 12. Both the first longitudinal spring 6-1 and the second longitudinal spring 6-2 are compression springs.

[0031] In this invention, the transverse linear bearing 9 and the cylindrical oscillator 10 constitute a transverse mass module. The first transverse spring 7-1 and the second transverse spring 7-2 constitute a transverse damping spring module. The transverse mass module and the transverse damping spring module together constitute a transverse damping unit, which achieves transverse vibration reduction and damping. The local resonance frame 5, the longitudinal sliding module 2, the transverse spring module, and the two spring supports 11 connected to the local resonance frame 5 together constitute a longitudinal mass module. The first longitudinal spring 6-1 and the second longitudinal spring 6-2 constitute a longitudinal damping spring module. The longitudinal mass module and the longitudinal damping spring module constitute a longitudinal damping unit. The longitudinal damping unit achieves longitudinal vibration reduction and damping.

[0032] like Figure 4 As shown, the unidirectional "static transmission and dynamic suppression" lightweight metamaterial structure is in a stable state. At this time, the transverse mass module is located in the middle position of the transverse guide shaft 8, and the compression of the first transverse spring 7-1 and the second transverse spring 7-2 is equal. At the same time, the longitudinal mass module is located in the middle position of the longitudinal guide shaft 3, and the compression of the first longitudinal spring 6-1 and the second longitudinal spring 6-2 is equal.

[0033] like Figure 5 As shown, the unidirectional "static transmission and dynamic suppression" lightweight metamaterial structure is in a lateral excitation state. At this time, the lateral mass module deviates from the middle position of the lateral guide axis 8, the compression of the first lateral spring 7-1 increases, and the compression of the second lateral spring 7-2 decreases. At the same time, the longitudinal mass module is still in the middle position of the longitudinal guide axis 3, and the compression of the first longitudinal spring 6-1 and the second longitudinal spring 6-2 is equal.

[0034] like Figure 6 As shown, the unidirectional "static transmission and dynamic suppression" lightweight metamaterial structure is in a longitudinally excited state. At this time, the transverse mass module is at the middle position of the transverse guide shaft 8, and the compression of the first transverse spring 7-1 and the second transverse spring 7-2 is equal. At the same time, the longitudinal mass module deviates from the middle position of the longitudinal guide shaft 3, the compression of the first longitudinal spring 6-1 increases, and the compression of the second longitudinal spring 6-2 decreases.

[0035] In summary, this invention can achieve effective static load transfer and efficient dynamic load suppression in the horizontal direction, and it can also achieve effective static load transfer and efficient dynamic load suppression in the vertical direction. The directions of "transferring static load and suppressing dynamic load" are consistent.

[0036] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A lightweight metamaterial structure with unidirectional "static transmission and motion suppression", characterized in that, The system includes a bidirectional corrugated plate frame (1), a longitudinal guide shaft (3), a local resonance frame (5), a longitudinal spring module, a longitudinal sliding module (2), and a transverse spring module. The bidirectional corrugated plate frame (1) has a first cavity that runs through the front and back. The local resonance frame (5) is suspended in the first cavity. The local resonance frame (5) has a second cavity. The transverse spring module is suspended in the second cavity. A longitudinal guide shaft (3) is provided on each side of the local resonance frame (5). The longitudinal guide shaft (3) is fixedly connected to the bidirectional corrugated plate frame (1). The two longitudinal guide shafts (3) are symmetrically arranged. A longitudinal guide shaft (3) is slidably connected to a longitudinal sliding module (2). The longitudinal sliding module (2), the local resonance frame (5), and the transverse spring module slide together along the longitudinal guide shaft (3). A longitudinal spring module is suspended on each of the other two sides of the local resonance frame (5). The two longitudinal spring modules are symmetrically arranged. The longitudinal spring module is located in the first cavity. The two ends of the longitudinal spring module are respectively connected to the local resonance frame (5) and the bidirectional corrugated plate frame (1). When the local resonance frame (5) moves to one side, it will compress the longitudinal spring module on the same side and stretch the longitudinal spring module on the other side.

2. The lightweight metamaterial structure for "static transmission and motion suppression" according to claim 1, characterized in that, The first cavity is composed of a central hole and two side holes connected together. The central hole is a rectangular hole and the side holes are trapezoidal holes. The two side holes are symmetrically arranged on opposite sides of the central hole. The two ends of the guide shaft (3) are respectively connected to the two side edges of the rectangular hole.

3. The lightweight metamaterial structure for "static transmission and motion suppression" according to claim 2, characterized in that, Trapezoidal grooves are provided on the upper and lower surfaces and the front and back surfaces of the bidirectional corrugated plate frame (1).

4. The unidirectional "static transmission and motion suppression" lightweight metamaterial structure according to claim 1, characterized in that, The transverse spring module includes a first transverse spring (7-1), a second transverse spring (7-2), a transverse guide shaft (8), a transverse linear bearing (9), and a cylindrical oscillator (10). The two ends of the transverse guide shaft (8) pass through the local resonance frame (5) and are fixedly connected to the longitudinal sliding module. The transverse linear bearing (9) is slidably connected to the transverse guide shaft (8). The cylindrical oscillator (10) is fixedly connected to the transverse linear bearing (9). The first transverse spring (7-1) and the second transverse spring (7-2) are both slidably connected to the transverse guide shaft (8). One end of the first transverse spring (7-1) is connected to one side of the transverse linear bearing (9), and the other end is connected to the inner side of the second cavity. One end of the second transverse spring (7-2) is connected to the other side of the transverse linear bearing (9), and the other end is connected to the other inner side of the second cavity. The first transverse spring (7-1) and the second transverse spring (7-2) are both compression springs and are symmetrically arranged about the transverse linear bearing (9).

5. The lightweight metamaterial structure for "static transmission and motion suppression" according to claim 1, characterized in that, The longitudinal spring module includes a second longitudinal spring (6-2), a spring bracket (11), and a set screw (12). The two ends of the second longitudinal spring (6-2) are detachably connected to a spring bracket (11). The two spring brackets (11) are fixedly connected to the bidirectional corrugated plate frame (1) and the local resonance frame (5) respectively by the set screw (12).

6. The lightweight metamaterial structure for "static transmission and motion suppression" according to claim 5, characterized in that, The spring bracket (11) has three L-shaped pressure blocks along its circumference. The three L-shaped pressure blocks hold a spring ring at the end of the second longitudinal spring (6-2). The second longitudinal spring (6-2) is a compression spring.

7. The lightweight metamaterial structure for "static transmission and motion suppression" according to claim 1, characterized in that, The longitudinal sliding module (2) includes a longitudinal linear bearing (2-1) and a bearing seat (2-2). The longitudinal linear bearing (2-1) is slidably connected to the longitudinal guide shaft (3). The longitudinal linear bearing (2-1) is mounted on the bearing seat (2-2). The bearing seat (2-2) is fixedly connected to the local resonance frame (5).

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