Lightweight metamaterial structure capable of transmitting static and restraining motion in same direction

Abstract

The invention discloses a light metamaterial structure capable of transmitting static and restraining motion in the same direction, and relates to the technical field of engineering structure vibration reduction. Comprising a two-way corrugated plate frame, a longitudinal guide shaft, a local resonance frame, a longitudinal spring module, a longitudinal sliding module and a transverse spring module. The bidirectional corrugated plate frame is provided with a first cavity, the local resonance frame is arranged in the first cavity in a suspended mode, the transverse spring module is connected with the local resonance frame, the two sides of the local resonance frame are each provided with a longitudinal guide shaft, the longitudinal guide shafts are connected with the bidirectional corrugated plate frame, and the longitudinal guide shafts are connected with the longitudinal sliding module in a sliding mode. The other two sides of the local resonance frame are each provided with a longitudinal spring module, and the two ends of each longitudinal spring module are connected with the local resonance frame and the two-way corrugated plate frame respectively. While light weight is achieved, effective transmission of static load and efficient suppression of dynamic load can be met in the longitudinal direction and the transverse direction at the same time.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering structure vibration reduction, and more specifically, relates to a lightweight metamaterial structure capable of transmitting static and suppressing motion in the same direction. Background Art

[0002] In industrial and engineering applications, effective vibration control is of great significance to the stable operation of equipment and the safety of structures, especially in the fields of aerospace, rail transportation and mechanical equipment, which require both the ability of the structure to bear static loads and the ability to suppress vibrations caused by dynamic loads. However, existing technologies usually find it difficult to achieve an efficient combination between static load transmission and dynamic load suppression, and there are certain technical bottlenecks.

[0003] Corrugated plate is a typical lightweight load-bearing structure, which is widely used in engineering practice because of its excellent load-bearing capacity in the cross-sectional direction. However, the traditional corrugated plate structure is mainly used to bear static loads, and there is usually no effective means to suppress the dynamic load caused by vibration. Local resonance metamaterials have become a research hotspot in the field of vibration control in recent years. By introducing local oscillators on the base structure to form a specific frequency band gap, it can effectively attenuate the propagation of vibration waves.

[0004] In the invention patent with the announcement number CN 110654072 B, it is proposed to stack zigzag partitions between multiple layers of corrugated plates to further improve the compression resistance of the structure in the cross-sectional direction. In the invention patent with the announcement number CN 112324827A, it is proposed to embed periodically arranged circular resonance units in a double-layer pyramid structure to produce a broadband band gap. In the invention patents with the announcement numbers CN114550682 A, CN 116221313 A and CN 114718974 A, it is proposed to achieve vibration suppression effects in multiple directions through cavities, particles and support beams. Although the above technologies have improved the static transmission and dynamic suppression performance of the structure to a certain extent, these structures cannot meet the requirements of static load transmission and dynamic load suppression in multiple directions at the same time, and are difficult to be effectively applied in actual engineering environments with multi-directional excitation.

[0005] In order to meet the needs of static load transmission 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 multi-directional "static load transmission and dynamic load suppression" needs, and keep the directions of static loads and dynamic loads consistent, which 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. The structure is based on a corrugated plate design and utilizes the high specific strength characteristics of the corrugated plate and the band gap characteristics of the bidirectional localized oscillator. While achieving lightweight, it can also meet the requirements of effective transmission of static loads and efficient suppression of dynamic loads in both the longitudinal and lateral directions.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a unidirectional "static transmission and motion suppression" lightweight metamaterial structure, comprising a bidirectional corrugated plate frame, a longitudinal guide shaft, a local resonance frame, a longitudinal spring module, a longitudinal sliding module, and a transverse spring module; the bidirectional corrugated plate frame is provided with a first cavity that runs through from front to back, the local resonance frame is suspended in the first cavity, a second cavity is provided in the local resonance frame, the transverse spring module is suspended in the second cavity, a longitudinal guide shaft is respectively provided on both sides of the local resonance 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, and the longitudinal sliding module, the local resonance frame and the transverse spring module slide and move together along the longitudinal guide shaft; a longitudinal spring module is respectively suspended on the other two sides of the local resonance 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 resonance frame and the bidirectional corrugated plate frame, and when the local resonance 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 middle hole and two side holes connected together, the middle hole is a rectangular hole, the side holes are trapezoidal holes, the two side holes are symmetrically arranged on opposite sides of the middle 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 vibrator; the two ends of the transverse guide shaft respectively pass through the local resonance frame and are fixedly connected to the longitudinal sliding module, the transverse linear bearing is slidably sleeved and connected to the transverse guide shaft, the cylindrical vibrator is fixedly connected to the transverse linear bearing, and the first transverse spring and the second transverse spring are both slidably sleeved and 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 side 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 side surface of the second cavity; the first transverse spring and the second transverse spring are both compression springs and are symmetrically arranged about the transverse linear bearing.

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

[0012] Preferably, the spring bracket is provided with three L-shaped pressing blocks along the circumference, and the three L-shaped pressing blocks clamp a circle of spring at the end of the second longitudinal spring, and the second longitudinal spring is a compression spring.

[0013] Preferably, the longitudinal sliding module comprises a longitudinal linear bearing and a bearing seat, the longitudinal linear bearing sliding sleeve is connected to the longitudinal guide shaft, the longitudinal linear bearing is installed on the bearing seat, and the bearing seat is fixedly connected to the local resonance frame.

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

[0015] 1. Synergy between static load transmission and dynamic load suppression functions. The transverse linear bearing and the cylindrical vibrator constitute a transverse mass module, the first transverse spring and the second transverse spring constitute a transverse restraining spring module, the transverse mass module and the transverse restraining spring module together constitute a transverse restraining unit, and the transverse restraining unit realizes transverse vibration reduction and suppression; the local resonance frame, the longitudinal sliding module, the transverse spring module and the two spring brackets connected to the local resonance frame together constitute a longitudinal mass module, the first longitudinal spring and the second longitudinal spring constitute a longitudinal restraining spring module, the longitudinal mass module and the longitudinal restraining spring module constitute a longitudinal restraining unit, and the longitudinal restraining unit realizes longitudinal vibration reduction and suppression. The present invention utilizes a bidirectional corrugated plate frame to realize effective transmission of transverse and longitudinal static loads, utilizes a transverse restraining unit and a longitudinal restraining unit to realize efficient suppression of dynamic loads, realizes the "static transmission and dynamic suppression" function in both the transverse and longitudinal directions, meets the performance requirements under multi-directional loads, and is suitable for complex vibration environments.

[0016] 2. Lightweight modular structural design. The bidirectional corrugated plate frame in the present invention adopts a structure similar to that of a corrugated plate, with a first cavity in the middle and trapezoidal grooves on the 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 motion suppression" function, so that it can meet the scenarios with strict weight restrictions, such as the aerospace field.

[0017] 3. Easy assembly and strong applicability. The components of the present invention adopt a modular design, and the assembly method between the components can adopt interference fit or threaded connection, which not only ensures the reliability and accuracy of installation, but also facilitates disassembly and maintenance. The structure can adapt to the customized needs in different scenarios and can be widely used in industries, scientific research and precision equipment with high vibration control requirements. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a main structural schematic diagram of the present invention;

[0020] Figure 3 yes Figure 2 AA cross-sectional structure diagram in;

[0021] Figure 4 It is a schematic diagram of a bidirectional local resonance type structure;

[0022] Figure 5 It is a schematic diagram of the state of the bidirectional local resonance structure when it is subjected to lateral excitation;

[0023] Figure 6 It is a schematic diagram of the state of the bidirectional local resonance structure when it is subjected to longitudinal excitation;

[0024] Figure 7 It is a schematic structural diagram of the local resonance type metamaterial beam of the present invention that transmits static and suppresses motion in the same direction;

[0025] In the figure: 1. bidirectional 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 vibrator; 11. spring bracket; 12. set screw. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] like Figure 1-4As shown, the same-direction "static transmission and motion suppression" lightweight metamaterial structure 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 is provided with a first cavity that runs through the front and back. The first cavity is composed of a middle hole and two side holes connected, the middle hole is a rectangular hole, the side hole is a trapezoidal hole, and the two side holes are symmetrically arranged on opposite sides of the middle hole. The upper and lower surfaces and the front and rear surfaces of the bidirectional corrugated plate frame 1 are provided with trapezoidal grooves to further reduce the weight. The local resonance frame 5 is suspended in the first cavity. A second cavity is provided in the local resonance frame 5, and the transverse spring module is suspended in 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 vibrator 10. Threads are provided at both ends of the transverse guide shaft 8, and after passing through the local resonance frame 5, it is connected to the longitudinal sliding module by threaded connection. The transverse linear bearing 9 is slidably connected to the transverse guide shaft 8, and the cylindrical vibrator 10 is connected to the transverse linear bearing 9 by interference fit. 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 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 side surface 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.

[0028] A longitudinal guide shaft 3 is provided on both sides of the local resonance frame 5, and the longitudinal guide shaft 3 is fixedly connected to the bidirectional corrugated plate frame 1 through a nut 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 sleeved and connected to the longitudinal guide shaft 3, and the longitudinal linear bearing 2-1 is installed on the bearing seat 2-2. The longitudinal sliding module 2, the local resonance frame 5 and the transverse spring module slide and move along the longitudinal guide shaft 3 together.

[0029] A longitudinal spring module is suspended on the other two sides of the local resonance frame 5, and the two longitudinal spring modules are symmetrically arranged. The longitudinal spring modules are 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 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 is provided with three L-shaped pressing blocks along the circumference, and the three L-shaped pressing blocks clamp a circle of spring at the end of the second longitudinal spring 6-2, so that the second spring 6-2 can 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 local resonance frame 5 respectively through the set screws 12. The first longitudinal spring 6-1 and the second longitudinal spring 6-2 are both compression springs.

[0031] In the present invention, the transverse linear bearing 9 and the cylindrical vibrator 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, and the transverse damping unit realizes transverse vibration damping. The local resonance frame 5, the longitudinal sliding module 2, the transverse spring module and the two spring brackets 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 realizes longitudinal vibration damping.

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

[0033] like Figure 5 As shown, the same-direction "static transmission and motion 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 shaft 8, the compression amount of the first lateral spring 7-1 increases, and the compression amount 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 shaft 3, and the compression amount of the first longitudinal spring 6-1 is equal to that of the second longitudinal spring 6-2.

[0034] like Figure 6 As shown, the same-direction "static transmission and motion suppression" lightweight metamaterial structure is in a longitudinal excitation state. At this time, the transverse mass module is 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 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, the present invention can achieve effective transmission of static loads and efficient suppression of dynamic loads in the lateral direction, and can also achieve effective transmission of static loads and efficient suppression of dynamic loads in the longitudinal direction, and the directions of “transmitting static loads and suppressing dynamic loads” are consistent.

[0036] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A lightweight metamaterial structure that transmits static electricity and suppresses motion in the same direction, characterized in that: The invention comprises 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) is provided with a first cavity which is through-through from front to back, the local resonance frame (5) is suspended in the first cavity, a second cavity is provided in the local resonance frame (5), the transverse spring module is suspended in the second cavity, a longitudinal guide shaft (3) is provided on both sides 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, and each longitudinal guide shaft (3) is provided with a longitudinal guide shaft (3) which is fixedly connected to the bidirectional corrugated plate frame (1), and the two longitudinal guide shafts (3) are symmetrically arranged. A longitudinal guide shaft (3) is slidably connected to a longitudinal sliding module (2), and the longitudinal sliding module (2), the local resonance frame (5) and the transverse spring module slide and move together along the longitudinal guide shaft (3); a longitudinal spring module is suspended on the other two sides of the local resonance frame (5), and the two longitudinal spring modules are symmetrically arranged. The longitudinal spring modules are located in the first cavity, and the two ends of the longitudinal spring modules 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 compresses the longitudinal spring module on the same side and stretches the longitudinal spring module on the other side.

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

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

4. The same-direction "static transmission and motion suppression" lightweight metamaterial structure according to claim 1 is characterized in that: The transverse spring module comprises 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 vibrator (10); the two ends of the transverse guide shaft (8) respectively pass through the local resonance frame (5) and are fixedly connected to the longitudinal sliding module, the transverse linear bearing (9) is slidably sleeved and connected to the transverse guide shaft (8), the cylindrical vibrator (10) is fixedly connected to the transverse linear bearing (9), and the first transverse spring (7-1) and the second transverse spring (7-2) are both slidably sleeved and 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 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 side surface 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 with respect to the transverse linear bearing (9).

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

6. The same-direction "static transmission and motion suppression" lightweight metamaterial structure according to claim 5, characterized in that: The spring bracket (11) is provided with three L-shaped pressing blocks along the circumference, and the three L-shaped pressing blocks clamp a circle of spring at the end of the second longitudinal spring (6-2), and the second longitudinal spring (6-2) is a compression spring.

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

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