A graded energy-dissipating metal damper

Abstract

This invention belongs to the technical field of energy dissipation and vibration reduction, specifically disclosing a graded energy-dissipating metal damper. This graded energy-dissipating metal damper includes a primary energy-dissipating unit, a secondary energy-dissipating unit, and a connecting unit. The primary energy-dissipating unit achieves energy dissipation and vibration reduction through plastic deformation of a metal block with low yield strength. The secondary energy-dissipating unit achieves energy dissipation and vibration reduction through plastic deformation of a ring-shaped metal with slightly lower yield strength, and also provides a certain stiffness to the external engineering structure. The connecting unit connects the primary and secondary energy-dissipating units to form an integrated energy-dissipating device. In this invention, the graded energy-dissipating metal damper allows only the primary energy-dissipating unit to operate independently when the external engineering structure experiences small displacements, while the primary and secondary energy-dissipating units work together when larger displacements occur, demonstrating strong adaptability.

Description

Technical Field

[0001] This invention belongs to the field of energy dissipation and vibration reduction technology, and more specifically, relates to a graded energy dissipation type metal damper. Background Technology

[0002] Energy dissipation and vibration reduction technology plays a crucial role in the seismic resistance of civil engineering structures. Traditional seismic resistance of structures increases the cross-sectional area, thereby enhancing the structure's strength and stiffness to resist and dissipate earthquake energy. However, due to the uncertainty of earthquake intensity, the size of the building structure's cross-section is difficult to determine, resulting in high construction costs. Energy dissipation and vibration reduction structures, by installing energy dissipation and vibration reduction devices on the building structure, form a new structural system with the original structure. These devices dissipate the input energy, achieving the goal of structural seismic resistance, reducing damage to the building structure, and lowering economic costs.

[0003] Scholars both domestically and internationally have designed and developed various energy dissipation and vibration reduction devices, such as metal dampers, viscous dampers, friction energy dissipators, viscoelastic dampers, and inductive energy dissipators. Metal dampers are widely used due to their simple structure, straightforward mechanical mechanism, low cost, and minimal susceptibility to external interference. However, existing metal dampers often suffer from limited functionality, making them unsuitable for situations requiring diverse seismic resistance. Summary of the Invention

[0004] To address the above deficiencies, this invention provides a graded energy-dissipating metal damper. Through connection design, a novel energy-dissipating and vibration-damping component is obtained where the metal block damper alone dissipates energy under small displacements, and the metal block damper and the ring-shaped metal energy dissipator work together under large displacements.

[0005] To achieve the above objectives, this invention proposes a graded energy-dissipating metal damper, comprising a primary energy-dissipating unit, a secondary energy-dissipating unit, and a connecting unit. The connecting unit is used to connect the primary energy-dissipating unit and the secondary energy-dissipating unit in the horizontal direction. The primary energy-dissipating unit includes a metal block and a metal block cover plate that is snapped into the upper and lower ends of the metal block. The secondary energy-dissipating unit includes an annular metal and an annular metal cover plate that is connected to the upper and lower ends of the annular metal. The primary energy-dissipating unit is fixed to one end surface of the connecting unit in the horizontal direction by the metal block cover plate, and the secondary energy-dissipating unit is fixed to the other end surface of the connecting unit in the horizontal direction by the annular metal cover plate.

[0006] The yield strength of the metal block is not greater than 110 MPa, and the yield strength of the ring-shaped metal is at least 50 MPa greater than the yield strength of the metal block.

[0007] According to one embodiment of the present invention, the yield strength of the ring-shaped metal is 160-650 MPa, and the stiffness of the ring-shaped metal is not less than 205 GPa.

[0008] According to one embodiment of the present invention, the metal in the metal block is one of pure lead, pure copper, pure aluminum, pure magnesium, pure nickel, lead alloy, copper alloy, aluminum alloy, magnesium alloy, and nickel alloy.

[0009] According to one embodiment of the present invention, the ring-shaped metal is made of mild steel or shape memory alloy, and the ring shape of the ring-shaped metal is one of C-ring, U-ring, J-ring, and O-ring.

[0010] According to one embodiment of the present invention, a plurality of limiting rods for limiting the annular metal are evenly distributed on the annular metal cover plate.

[0011] According to one embodiment of the present invention, the connecting unit includes a metal block end connecting rod and an annular metal end connecting rod that are connected to each other in the horizontal direction through their respective connecting ends. The upper and lower surfaces of the non-connecting ends of the metal block end connecting rods are connected to the metal block cover plate, and the upper and lower surfaces of the non-connecting ends of the annular metal end connecting rods are connected to the annular metal cover plate.

[0012] According to one embodiment of the present invention, the connecting end of the metal block end connecting rod and the connecting end of the annular metal end connecting rod are connected through a graded connecting rod. The two ends of the graded connecting rod are connected to a pair of buckles and springs symmetrical about the axis of the graded connecting rod. The two ends of the graded connecting rod, the buckles and the springs are sealed by a metal block end connecting cover plate located on the upper surface of the connecting end of the metal block end connecting rod and an annular metal end connecting cover plate located on the upper surface of the connecting end of the annular metal end connecting rod.

[0013] According to one embodiment of the present invention, the connecting unit further includes a sleeve for sealing the primary energy-consuming unit and the secondary energy-consuming unit, the sleeve having an opening at one end facing the metal block end connecting rod, and the length of the sleeve in the horizontal direction being less than that of the connecting unit.

[0014] According to one embodiment of the present invention, a plurality of pull rod connecting holes are evenly distributed on the end face of the metal block end connecting rod away from the first-level energy consumption unit, and a plurality of sleeve connecting holes are evenly distributed on the end face of the sleeve away from the metal block end connecting rod, wherein the pull rod connecting holes and the sleeve connecting holes are used for external engineering structures.

[0015] In summary, compared with the prior art, the above-described technical solutions conceived by this invention mainly possess the following technical advantages:

[0016] 1. This invention employs a metal block with good plastic deformation capacity as the main body of the primary energy dissipation unit, and a ring-shaped metal with slightly lower plastic deformation capacity as the main body of the secondary energy dissipation unit. The two are connected by a connecting unit. This allows the primary energy dissipation unit to dissipate energy solely through plastic deformation when the engineering structure experiences small displacements, while the secondary energy dissipation unit does not participate in the operation. When the displacement of the engineering structure exceeds a certain level, the secondary energy dissipation unit and the primary energy dissipation unit work together to dissipate energy. Through its graded capability, the metal damper of this invention can be applied to civil engineering structures with different energy dissipation and vibration reduction purposes at different stages, thus expanding its application range.

[0017] 2. The secondary energy dissipation unit of the present invention has both a certain plastic deformation capacity and stiffness. When the displacement of the structure is large, the secondary energy dissipation unit can provide a certain stiffness to the engineering structure while dissipating energy, thereby reducing the deformation of the engineering structure itself.

[0018] 3. This invention uses a sleeve to change the installation method of the damper from the traditional top and bottom external connection to the left and right external connection. When the external structure undergoes axial piston movement, it can also dissipate energy, thus expanding the application range. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a graded energy-dissipating metal damper provided in a preferred embodiment of the present invention.

[0020] Figure 2 This is another three-dimensional schematic diagram of the graded energy-dissipating metal damper provided in a preferred embodiment of the present invention.

[0021] Figure 3 This is a three-dimensional schematic diagram of the overall energy dissipation device of the graded energy-dissipating metal damper provided in a preferred embodiment of the present invention.

[0022] Figure 4 This is a left view of the overall energy dissipation device of the graded energy-dissipating metal damper provided in a preferred embodiment of the present invention.

[0023] Figure 5 This is a three-dimensional schematic diagram of the connection device of the graded energy-dissipating metal damper provided in an embodiment of the present invention.

[0024] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein;

[0025] 1-Metal block end connecting rod, 2-Pull rod connecting hole, 3-Metal block cover plate, 4-Metal block, 5-Bolt, 6-Metal block end connecting cover plate, 7-Ring-shaped metal, 8-Ring-shaped metal cover plate, 9-Ring-shaped metal end connecting cover plate, 10-Ring-shaped metal end connecting rod, 11-Sleeve, 12-Sleeve connecting hole, 13-Grading connecting rod, 14-Snap buckle, 15-Spring, 16-Limiting rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0027] Example 1

[0028] like Figures 1-5 As shown, this embodiment 1 provides a graded energy-dissipating metal damper, which includes a first-stage energy-dissipating unit, a second-stage energy-dissipating unit, and a connecting unit, wherein:

[0029] The primary energy-consuming unit includes two metal block cover plates 3 and a metal block 4, which are fixed by a connecting unit. The energy is dissipated by the deformation of the metal block 4. This embodiment includes two sets of primary energy-consuming units, which are symmetrically arranged on the upper and lower surfaces of one end of the connecting unit.

[0030] The secondary energy-consuming unit consists of a ring-shaped metal piece 7, two ring-shaped metal cover plates 8, and four limiting rods 16 on the ring-shaped metal cover plates 8, arranged symmetrically on the upper and lower surfaces of the other end of the connecting unit and fixed. In this embodiment, the number of ring-shaped metal pieces 7 in a single secondary energy-consuming unit is two, and a total of two sets of secondary energy-consuming units are set.

[0031] The connecting unit includes a metal block end connecting rod 1, a graded connecting rod 13, an annular metal end connecting rod 10, a metal block end connecting cover plate 6, an annular metal end connecting cover plate 9, a buckle 14, a spring 15, and a sleeve 11. The graded connecting rod 13 is located between the metal block end connecting rod 1 and the annular metal end connecting rod 10, and is partially connected within the metal block end connecting rod 1 and the annular metal end connecting rod 10. Two springs 15 and a buckle 14 are respectively installed inside the metal block end connecting rod 1 and the annular metal end connecting rod 10 to connect to the graded connecting rod 13. The metal block end connecting cover plate 6 and the annular metal end connecting cover plate 9 are respectively connected to the metal block end connecting rod 1 and the annular metal end connecting rod 10 by bolts 5. A predetermined number of primary energy-consuming units are connected to the metal block end connecting rod 1 by bolts 5, and a predetermined number of secondary energy-consuming units are connected to the annular metal end connecting rod 10 by bolts 5, all symmetrically arranged to obtain an integrated energy-consuming device. The secondary energy-consuming unit of the overall energy-consuming device is placed inside the sleeve 11 with the primary energy-consuming unit facing inward and the secondary energy-consuming unit facing outward. The primary and secondary energy-consuming units are then connected to the inner wall of the sleeve 11 using bolts 5. The metal block end connecting rod 1 is provided with a pull rod connecting hole 2, and the sleeve 11 is provided with a sleeve connecting hole 12, both for connecting to external engineering structures.

[0032] In this embodiment, the metal block 4 is made of pure lead with a yield strength of 1 MPa, and the ring-shaped metal 7 is made of mild steel with a yield strength of 240 MPa and a stiffness of 205 GPa, specifically a U-shaped ring. Except for the spring 15, all components of the connecting unit are made of hard steel. The dimensions of the metal block end connecting rod 1, the pull rod connecting hole 2, the metal block cover plate 3, the metal block 4, the bolt 5, the metal block end connecting cover plate 6, the ring-shaped metal 7, the ring-shaped metal cover plate 8, the ring-shaped metal end connecting cover plate 9, the ring-shaped metal end connecting rod 10, the sleeve 11, the sleeve connecting hole 12, the graded connecting rod 13, the buckle 14, the spring 15, and the limiting rod 16 can be flexibly determined according to actual needs.

[0033] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A graded energy-dissipating metal damper, characterized in that, It includes a primary energy-consuming unit, a secondary energy-consuming unit, and a connecting unit. The connecting unit is used to connect the primary energy-consuming unit and the secondary energy-consuming unit in the horizontal direction. The primary energy-consuming unit includes a metal block and a metal block cover plate that is snapped into the upper and lower ends of the metal block. The secondary energy-consuming unit includes a ring-shaped metal and a ring-shaped metal cover plate that is connected to the upper and lower ends of the ring-shaped metal. The primary energy-consuming unit is fixed to one end surface of the connecting unit in the horizontal direction by the metal block cover plate, and the secondary energy-consuming unit is fixed to the other end surface of the connecting unit in the horizontal direction by the ring-shaped metal cover plate. The yield strength of the metal block is not greater than 110 MPa, and the yield strength of the ring-shaped metal is at least 50 MPa greater than the yield strength of the metal block. The connecting unit includes a metal block end connecting rod and a ring-shaped metal end connecting rod connected to each other in the horizontal direction through their respective connecting ends. The upper and lower surfaces of the non-connecting ends of the metal block end connecting rods are connected to the metal block cover plate, and the upper and lower surfaces of the non-connecting ends of the ring-shaped metal end connecting rods are connected to the ring-shaped metal cover plate. The connecting ends of the metal block end connecting rods and the connecting ends of the ring-shaped metal end connecting rods are connected through a graded connecting rod. The two ends of the graded connecting rods are connected to a pair of buckles and springs symmetrical about the axis of the graded connecting rods. The two ends of the graded connecting rods, the buckles, and the springs are sealed by a metal block end connecting cover plate located on the upper surface of the connecting end of the metal block end connecting rod and a ring-shaped metal end connecting cover plate located on the upper surface of the connecting end of the ring-shaped metal end connecting rod.

2. The graded energy-dissipating metal damper according to claim 1, characterized in that, The yield strength of the ring-shaped metal is 160-650 MPa, and the stiffness of the ring-shaped metal is not less than 205 GPa.

3. A graded energy-dissipating metal damper according to claim 1 or 2, characterized in that, The metal in the metal block is one of pure lead, pure copper, pure aluminum, pure magnesium, pure nickel, lead alloy, copper alloy, aluminum alloy, magnesium alloy, and nickel alloy.

4. A graded energy-dissipating metal damper according to claim 1 or 2, characterized in that, The ring-shaped metal is made of mild steel or shape memory alloy, and the ring shape of the ring-shaped metal is one of C-ring, U-ring, J-ring, and O-ring.

5. A graded energy-dissipating metal damper according to claim 1, characterized in that, The annular metal cover plate has a plurality of limiting rods evenly distributed thereon to restrict the annular metal.

6. A graded energy-dissipating metal damper according to claim 1, characterized in that, The connecting unit further includes a sleeve for sealing the primary energy-consuming unit and the secondary energy-consuming unit. The sleeve has an opening at one end facing the metal block end connecting rod, and the length of the sleeve in the horizontal direction is less than that of the connecting unit.

7. A graded energy-dissipating metal damper according to claim 6, characterized in that, The end face of the metal block end connecting rod away from the first-level energy consumption unit has a plurality of pull rod connecting holes evenly distributed on it, and the end face of the sleeve away from the metal block end connecting rod has a plurality of sleeve connecting holes evenly distributed on it. The pull rod connecting holes and the sleeve connecting holes are used for external engineering structures.

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