Variable amplitude type self-resetting grading energy consumption system

Abstract

The invention discloses a variable amplitude type self-resetting graded energy consumption system, which belongs to the technical field of shock absorption of engineering structures and comprises a movable connector, a sleeve and a fixed connector. The fixed connector and the movable connector are arranged on the two sides of the sleeve respectively. The fixed connector is fixedly connected with one end of the sleeve; the movable connector is movably connected with the other end of the sleeve through a transmission rod; a damping assembly is arranged in the sleeve; the other end of the transmission rod penetrates through the side wall of the sleeve to be connected with the damping assembly. The damping assembly comprises two sets of strengthening gears, a first energy dissipation assembly and a second energy dissipation assembly. According to the invention, the tension and compression asymmetry of the mechanical property of the traditional SMA material is fundamentally overcome, the segmented energy consumption self-resetting capability is realized, the completeness and reliability of the self-resetting and high energy consumption characteristics of the SMA material under cyclic load are ensured, the durability and stability of an energy consumption system under all working conditions are obviously improved, and the energy consumption performance of the SMA material is improved. And the application range of the energy consumption system is greatly expanded.

Description

A variable amplitude self-resetting graded energy dissipation system Technical Field

[0001] This invention belongs to the field of vibration reduction technology for engineering structures, and more specifically relates to a variable amplitude self-resetting graded energy dissipation system. Background Technology

[0002] In the traditional field of structural vibration reduction, shape memory alloys (SMA) are regarded as ideal damping materials due to their excellent superelasticity and self-resetting ability. However, when applied to actual energy dissipation systems, they still face two key technical bottlenecks: First, the tensile and compressive mechanical properties of SMA materials exhibit significant asymmetry. Under compression, it is difficult for stress plateaus to appear, resulting in a degradation of deformation capacity. Furthermore, when made into slender rods as core energy dissipation components, they are prone to buckling instability, which severely limits their reliability and energy dissipation efficiency under alternating tensile and compressive loads.

[0003] Secondly, although SMA has excellent energy dissipation and recovery characteristics under tension, its recoverable strain range is limited. Under the excessive inter-story displacement demand caused by strong earthquakes or wind vibrations, SMA bars are prone to breakage due to excessive deformation. Its inherent deformation capacity is difficult to directly meet the vibration reduction requirements of different engineering structures for large deformations.

[0004] In addition, existing SMA-based damping devices are often single-function, mostly focusing on achieving self-resetting or simple energy dissipation, lacking a mechanism for phased control of the energy dissipation process, making it difficult to simultaneously achieve an optimized balance between initial stiffness, graded energy dissipation efficiency and final reset capability when the structure encounters excitations of different intensities.

[0005] Therefore, there is an urgent need to invent a new type of graded energy consumption system. Summary of the Invention

[0006] In view of this, the present invention provides a variable amplitude self-resetting graded energy dissipation system that can fundamentally solve the problem of SMA bar buckling under compression, ensuring that it is always in a highly efficient tensile working state during tension-compression cycles. It also innovatively integrates a displacement amplification mechanism, thereby significantly improving its effective deformation and energy dissipation capacity without sacrificing the material's own performance. At the same time, it endows it with a staged adaptive energy dissipation mechanism to break through the key bottleneck of current SMA damping technology in engineering applications and meet the urgent needs of modern structures for high-performance, adaptive damping devices.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a variable amplitude self-resetting graded energy dissipation system, comprising a movable connector, a sleeve, and a fixed connector; the fixed connector and the movable connector are respectively disposed on both sides of the sleeve; the fixed connector is fixedly connected to one end of the sleeve; the movable connector is movably connected to the other end of the sleeve via a transmission rod; a damping component is disposed inside the sleeve; one end of the transmission rod is fixedly connected to the movable connector, and the other end passes through the side wall of the sleeve and connects to the damping component.

[0008] Furthermore, the damping assembly includes two sets of reinforcing gears, a first energy-dissipating component, and a second energy-dissipating component; teeth are provided on both sides of one end of the transmission rod that extends into the sleeve; the two sets of reinforcing gears are symmetrically arranged relative to the transmission rod and mesh with the transmission rod from both sides respectively; the top of the reinforcing gear is connected to the second energy-dissipating component; and multiple sets of first energy-dissipating components are slidably connected to the bottom of the reinforcing gear.

[0009] Furthermore, the bottom of the reinforced gear is provided with four slide rails along the circumferential direction of the center; the first energy-consuming component includes a fixed groove, a guide plate, a slider, and a first SMA rod; the fixed groove is fixedly installed inside the sleeve; the slider is slidably disposed inside the fixed groove; the other end of the slider is connected to the guide plate, one end of the first SMA rod passes through the guide plate and is installed on the guide plate, and the other end passes through the slider and is installed on the groove plate of the fixed groove; a guide post is provided on the side of the slider near the reinforced gear, and the guide post is slidably installed in the slide rail.

[0010] Furthermore, the second energy-consuming component includes a follower block, a follower plate, a second SMA rod, and a fixing plate; two sets of fixing plates are symmetrically arranged relative to the transmission rod, each set containing two symmetrically arranged fixing plates; the fixing plates are fixedly installed inside the sleeve perpendicular to the transmission rod; both ends of the second SMA rod pass through the two fixing plates in each set, and the ends extend out and are fixedly connected to the follower plate; the follower block is movably arranged between the two sets of follower plates on one side of the transmission rod; teeth are provided on both sides of the follower block, and transmission gears are coaxially fixed on the top of both sets of reinforcing gears; the two sets of transmission gears mesh with the follower block from both sides respectively.

[0011] Furthermore, multiple second SMA rods are arranged vertically along each set of fixing plates, and are arranged parallel to the transmission rod.

[0012] Furthermore, both the fixed connector and the movable connector are provided with retaining rings for connecting devices at their outer ends, which are respectively connected to the devices at both ends.

[0013] The beneficial effects of this invention are as follows: 1. Through its unique structural design, this invention ensures that the core SMA rod remains under tension even when the energy-dissipating system is subjected to both tensile and compressive displacements. This fundamentally overcomes the asymmetry of the tensile and compressive mechanical properties of traditional SMA materials and avoids the risk of buckling instability of the SMA rod under compression. This working mechanism, in which the SMA rod is under tension during both tensile and compressive stresses in the energy-dissipating system, ensures the integrity and reliability of the SMA material's self-resetting and high energy-dissipating characteristics under cyclic loading, significantly improving the durability and performance stability of the energy-dissipating system under all operating conditions.

[0014] 2. This invention innovates a deformation capacity enhancement mechanism. This mechanism can efficiently convert externally input inter-layer displacements into smaller tensile deformations within the SMA rod itself, operating within its optimal range. This significantly improves the effective travel and deformation adaptability of the energy dissipation system without causing material fracture. This allows SMA materials, which were originally limited by their own strain capacity, to meet the large displacement damping requirements of engineering structures under strong earthquakes, greatly expanding the application scope of SMA energy dissipation systems.

[0015] 3. This invention achieves phased energy dissipation capability. Through ingenious mechanical design, the energy dissipation system can activate different energy dissipation paths or stiffnesses at different displacement stages, thereby providing sufficient initial stiffness to control structural deformation during minor and moderate earthquakes, and efficiently dissipating a large amount of energy during strong earthquakes. This adaptive, phased energy dissipation characteristic allows for more refined and optimized control of the structural response, balancing daily use comfort with safety under extreme disasters.

[0016] 4. This invention possesses superior self-resetting capabilities. Thanks to the stable superelasticity of the SMA material and the system's protection of the SMA's operational state, the energy dissipation system can return to its initial position with almost no residual deformation after undergoing significant deformation and energy dissipation. This not only greatly reduces permanent structural displacement after an earthquake, lowering repair costs and difficulties, but also ensures the immediate availability and reliability of the energy dissipation system itself and the structural system during multiple events and even the main shock and aftershock sequences.

[0017] The synergistic effect of the aforementioned technical features contributes to the comprehensive advantages of the device of this invention, namely high performance, high adaptability, and high reliability. It fully and safely releases the material potential of SMA through mechanical design, providing an integrated vibration reduction solution that combines large deformation capacity, phased energy dissipation, full-cycle self-resetting, and no risk of compression, thus providing key technical support for improving the toughness and recoverability of engineering structures. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 is a schematic diagram of the internal structure of the sleeve of the present invention.

[0021] Figure 3 is a schematic diagram of the arrangement of the second SMA rod of the present invention.

[0022] Figure 4 is a schematic diagram of the reinforced gear and slide rail of the present invention.

[0023] Figure 5 is a schematic diagram of the energy-consuming component of the present invention.

[0024] Figure 6 is a diagram of the compression working mechanism of the present invention.

[0025] In the figure: 11-movable connector; 12-sleeve; 121-fixed plate; 122-fixed groove; 13-fixed connector; 21-transmission rod; 22-reinforced gear; 221-slide rail; 23-follower block; 24-follower plate; 25-first SMA rod; 26-second SMA rod; 27-slider; 28-guide plate. Detailed Implementation

[0026] 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 some embodiments of the present invention, and not all embodiments. 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.

[0027] Please refer to Figures 1-6. The present invention provides a variable amplitude self-resetting graded energy dissipation system, including a movable connector 11, a sleeve 12, and a fixed connector 13; the fixed connector 13 and the movable connector 11 are respectively disposed on both sides of the sleeve 12; the fixed connector 13 is fixedly connected to one end of the sleeve 12; the movable connector 11 is movably connected to the other end of the sleeve 12 through a transmission rod 21.

[0028] The sleeve 12 is equipped with a damping component; one end of the transmission rod 21 is fixedly connected to the movable connector 11, and the other end passes through the side wall of the sleeve 12 and is connected to the damping component.

[0029] The damping assembly includes two sets of reinforcing gears 22, a first energy dissipation component, and a second energy dissipation component; the transmission rod 21 extends into the sleeve 12 and has teeth on both sides of one end; the two sets of reinforcing gears 22 are symmetrically arranged relative to the transmission rod 21 and mesh with the transmission rod 21 from both sides; the top of the reinforcing gear 22 is connected to the second energy dissipation component; and the bottom of the reinforcing gear 22 is slidably connected to multiple sets of the first energy dissipation components.

[0030] The bottom of the reinforced gear 22 is provided with four slide rails 221 along the circumferential direction of the center; four sets of first energy-consuming components are slidably connected above the reinforced gear 22 via the slide rails 221.

[0031] The first energy-consuming component includes a fixed groove 122, a guide plate 28, a slider 27, and a first SMA rod 25. The fixed groove 122 is fixedly installed inside the sleeve 12; the fixed groove 22 includes four groove plates, forming a groove with an opening facing the reinforcing gear 22; the slider 27 is slidably disposed inside the fixed groove 122; the other end of the slider 27 is connected to the guide plate 28, one end of the first SMA rod 25 passes through the guide plate 28 and is installed on the guide plate 28, and the other end passes through the slider 27 and is installed on the groove plate of the fixed groove 122; a guide post is provided on the side of the slider 27 near the reinforcing gear 22, and the guide post is slidably installed in the slide rail 221.

[0032] The second energy-consuming component includes a follower block 23, a follower plate 24, a second SMA rod 26, and a fixing plate 121.

[0033] Two sets of fixing plates 121 are symmetrically arranged relative to the transmission rod 21, each set containing two symmetrically arranged fixing plates 121; the fixing plates 121 are fixedly installed inside the sleeve 12 perpendicular to the transmission rod 21; multiple second SMA rods 26 are arranged vertically along each set of fixing plates 121 and are arranged parallel to the transmission rod 21; both ends of the second SMA rods 26 penetrate through the two fixing plates 121 in each set, and the ends extend out and are fixedly connected to a follower plate 24.

[0034] One end of the transmission rod 21 passes through the follower plate 24, and the other end is located between the two sets of follower plates 24; two sets of reinforced gears 22 are located between the two sets of follower plates 24 and mesh with the transmission rod 21 from both sides respectively.

[0035] When the transmission rod 21 is moved under force, it drives the two sets of reinforced gears 22 to rotate.

[0036] The follower block 23 is provided with teeth on both sides, and the top of the two sets of reinforcing gears 22 are coaxially fixed with transmission gears; the transmission gears are coaxially arranged with the reinforcing gears 22; the two sets of transmission gears mesh with the follower block 23 from both sides respectively.

[0037] When the transmission rod 21 moves, it drives the reinforcing gear 22 to rotate, and at the same time drives the transmission gear to rotate, thereby driving the follower block 23 to move, and the follower plate 24 on top, which in turn stretches the second SMA rod 26.

[0038] When the reinforcing gear 22 rotates, the guide column moves within the slide rail 221, thereby driving the slider 27 and the guide plate 28 to move within the fixed groove 122, and thus the first SMA rod 25 is stretched.

[0039] Both the fixed connector 13 and the movable connector 11 have retaining rings at their outer ends for connecting the devices at both ends. When the energy dissipation system is under stress, the movement of the transmission rod 21 drives the reinforcing gear 22 to rotate, causing the slider 27 to slide vertically outward along the slide rail 221. The slider 27 drives the guide plate 28 to move, thereby stretching the first SMA rod 25 for the first stage of energy dissipation. When the reinforcing gear 22 rotates and causes the follower block 23 to contact the follower plate 24, the second SMA rod 26 will be stretched for the second stage of energy dissipation. Whether the energy dissipation system is subjected to tension or compression, the first SMA rod 25 and the second SMA rod 26 are subjected to tension, which can avoid the decrease in deformation performance and buckling instability.

[0040] As shown in Figure 6, taking the compression state as an example, with external energy input, during the first stage of energy consumption, the transmission rod 21 undergoes a translational displacement of D1. Through the conversion of the reinforcing gear 22, the first SMA rod 25 will deform by Δ1, and the follower block 23 will undergo a displacement of D2. At this time, the follower block 23 and the follower plate 24 are not yet in contact; only the first SMA rod 25 is under tension and consuming energy. During the second stage of energy consumption, the transmission rod 21 is displaced by D1', and the first SMA rod 25 will deform by Δ1'. At this time, the follower block deforms by D2', exceeding the initial gap, causing the follower plate 24 to translate and stretch the second SMA rod 26, causing it to deform by Δ2. The working principle is the same during stretching.

[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A variable amplitude self-resetting graded energy dissipation system, characterized in that, It includes a movable connector (11), a sleeve (12), and a fixed connector (13); the fixed connector (13) and the movable connector (11) are respectively disposed on both sides of the sleeve (12); the fixed connector (13) is fixedly connected to one end of the sleeve (12); the movable connector (11) is movably connected to the other end of the sleeve (12) through a transmission rod (21); a damping assembly is disposed inside the sleeve (12); one end of the transmission rod (21) is fixedly connected to the movable connector (11), and the other end passes through the side wall of the sleeve (12) and is connected to the damping assembly.

2. The variable amplitude self-resetting graded energy dissipation system according to claim 1, characterized in that, The damping assembly includes two sets of reinforcing gears (22), a first energy dissipation component, and a second energy dissipation component; the transmission rod (21) extends into the sleeve (12) and has teeth on both sides of one end; the two sets of reinforcing gears (22) are symmetrically arranged relative to the transmission rod (21) and mesh with the transmission rod (21) from both sides respectively; the top of the reinforcing gear (22) is connected to the second energy dissipation component; the bottom of the reinforcing gear (22) is slidably connected to multiple sets of first energy dissipation components.

3. The variable amplitude self-resetting graded energy dissipation system according to claim 2, characterized in that, The bottom of the reinforcing gear (22) is provided with four slide rails (221) along the circumferential direction of the center; the first energy-consuming component includes a fixed groove (122), a guide plate (28), a slider (27) and a first SMA rod (25); the fixed groove (122) is fixedly installed inside the sleeve (12); the slider (27) is slidably disposed inside the fixed groove (122); the other end of the slider (27) is connected to the guide plate (28), one end of the first SMA rod (25) passes through the guide plate (28) and is installed on the guide plate (28), and the other end passes through the slider (27) and is installed on the groove plate of the fixed groove (122); a guide post is provided on the side of the slider (27) near the reinforcing gear (22), and the guide post is slidably installed in the slide rail (221).

4. The variable amplitude self-resetting graded energy dissipation system according to claim 2, characterized in that, The second energy-consuming component includes a follower block (23), a follower plate (24), a second SMA rod (26), and a fixing plate (121); the fixing plate (121) is symmetrically arranged in two sets relative to the transmission rod (21), each set containing two symmetrically arranged fixing plates (121) at the front and rear; the fixing plate (121) is fixedly installed inside the sleeve (12) perpendicular to the transmission rod (21); both ends of the second SMA rod (26) pass through the two fixing plates (121) in each set, and the end extends out and is fixedly connected to the follower plate (24); the follower block (23) is provided with teeth on both sides, and the top of the two sets of reinforcing gears (22) is coaxially fixed with transmission gears; the two sets of transmission gears mesh with the follower block (23) from both sides respectively.

5. The variable amplitude self-resetting graded energy dissipation system according to claim 4, characterized in that, Multiple second SMA rods (26) are vertically arranged along each set of fixing plates (121) and are arranged parallel to the transmission rod (21).

6. The variable amplitude self-resetting graded energy dissipation system according to claim 1, characterized in that, The outer ends of both the fixed connector (13) and the movable connector (11) are provided with fixing rings for connecting devices, which are respectively connected to the devices at both ends.

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