Energy dissipation and vibration reduction device based on porous material

Abstract

The invention belongs to the technical field of engineering structure vibration reduction, and particularly relates to a porous material-based energy consumption and vibration reduction device which comprises an outer frame, a push-pull rod, a pressing plate, an energy consumption block, a self-locking assembly and a reset spring, a push-pull rod is fixed to the pressing plate in a penetrating mode, two energy consumption blocks arranged on the push-pull rod in a sleeving mode are symmetrically installed in the outer frame with the pressing plate as the center face, and the energy consumption blocks are made of porous materials. A self-locking assembly is installed on the portion, located on the outer side of each energy consumption block, in the outer frame, and the self-locking assemblies are arranged on the push-pull rods in a sleeving mode and make contact with the outer surfaces of the energy consumption blocks. A reset spring is installed between the outer frame and the self-locking assembly. The problem that the porous material cannot be directly used for continuous energy consumption under the reciprocating load due to the characteristics of the porous material is solved, the advantage of the stable plastic platform section of the porous material is exerted, and the purposes of continuous output and stable energy consumption of the device in the working process are achieved; and the porous material has important significance on popularization and application of the porous material in the field of engineering structure vibration reduction.

Description

Technical Field

[0001] The invention belongs to the technical field of engineering structure vibration reduction, and in particular relates to an energy dissipation vibration reduction device based on porous materials. Background Art

[0002] Energy dissipation and vibration reduction technology is an effective structural vibration control technology. It installs energy dissipation and vibration reduction devices at appropriate locations of the structure and utilizes the energy dissipation of these devices to reduce the dynamic response of the main structure under earthquakes, strong winds or other dynamic loads.

[0003] Porous materials refer to materials with a large number of holes inside. Due to their unique structure, porous materials have the advantages of light weight, high specific strength, high specific stiffness, high energy absorption capacity, etc. Therefore, the introduction of porous materials will inevitably provide new means and ways for vibration control of engineering structures.

[0004] Porous materials exhibit a long and stable plastic platform section under compressive load. In the plastic platform section, as the strain increases, the stress of the porous material remains basically unchanged, so the energy dissipation and vibration reduction device designed by using the performance of the porous material compression plastic platform section has good feasibility. However, since porous materials (such as porous aluminum) have good compressive performance and poor tensile performance, they are generally only used in compressive conditions, not in tensile conditions, and their deformation cannot be restored to their original position after unloading, forming an unloaded section (zero output), which makes it difficult to directly use it in conditions that bear reciprocating loads. Therefore, how to use the stable compression plastic platform section of porous materials to make an energy dissipation and vibration reduction device without an unloaded section (the unloaded section means that the device has zero output) to meet the requirements of the field of engineering structure control is of great significance to the promotion and application of porous materials in the field of engineering structure vibration reduction. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned problems existing in traditional technologies and to provide an energy dissipation and vibration reduction device based on porous materials. The device achieves the goal of continuous output and continuous and stable energy consumption during operation through the coordinated cooperation of components such as an outer shell, a push-pull rod, a pressure plate, a porous material, a self-locking assembly and a reset spring.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] The present invention provides an energy dissipation and vibration reduction device based on porous materials, which comprises an outer frame, a push-pull rod, a pressure plate, an energy dissipation block, a self-locking component and a reset spring; a push-pull rod is fixed through the pressure plate, and two energy dissipation blocks sleeved on the push-pull rod are symmetrically installed inside the outer frame with the pressure plate as the center, and the energy dissipation blocks are made of porous materials; a self-locking component is installed inside the outer frame on the outside of each energy dissipation block, and the self-locking component is sleeved on the push-pull rod and keeps in contact with the outer surface of the energy dissipation block on the side; a reset spring is installed between the outer frame and the self-locking component.

[0008] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the outer frame as a whole is a rectangular frame structure, and the outer frame includes a grooved frame plate, fasteners, a top frame plate and a connecting rod. The outer ends of the two side plates of the grooved frame plate respectively extend inward to form a convex plate parallel to the web plate, and the convex plate is fixed to the top frame plate by fasteners. A first through hole cooperating with the push-pull rod is opened on the top frame plate, and a connecting rod coinciding with the axis of the push-pull rod is fixed to the outer side of the web plate of the grooved frame plate.

[0009] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the top end of the push-pull rod extends out from the top frame plate of the outer frame, and a displacement distance is reserved between the bottom end of the push-pull rod and the inner side of the web of the grooved frame plate, and the displacement distance is greater than the design displacement of the energy dissipation and vibration reduction device.

[0010] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, a gap of 3 to 5 mm is left between the two side ends of the pressing plate and the inner wall of the outer frame to avoid contact between the pressing plate and the inner wall of the outer frame.

[0011] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the porous material is porous aluminum or porous steel, and the porous material can be placed in a plastic platform section after a certain pre-compression.

[0012] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the self-locking component includes an inner end plate, an outer end plate, a friction plate, a first ear plate, a second ear plate, a third ear plate, a first connecting rod, a second connecting rod, a tension spring and a pin shaft. The first ear plate is symmetrically fixed to the upper side of the inner end plate, and a second through hole cooperating with the push-pull rod is opened at the center of the inner end plate. The second ear plate is symmetrically fixed to the lower side of the outer end plate, and a third through hole cooperating with the push-pull rod is opened at the center of the outer end plate. There are two friction plates and they are arranged opposite to each other. A third ear plate is fixed to the inner side of the friction plate, a first connecting rod is installed between the third ear plate and the first ear plate, and a second connecting rod is installed between the third ear plate and the second ear plate. The tension spring is sleeved on the outside of the push-pull rod, and the two ends of the tension spring are respectively connected to the inner end plate and the outer end plate.

[0013] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the two ends of the first connecting rod are rotatably connected to the third ear plate and the first ear plate respectively through a pin shaft, and the two ends of the second connecting rod are rotatably connected to the third ear plate and the second ear plate respectively through a pin shaft; the lengths of the first connecting rod and the second connecting rod are the same, and the angles between the first connecting rod and the second connecting rod and the horizontal plane are equal, and the angle is denoted as θ.

[0014] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the tension spring in the self-locking assembly is in a tensioned state, the inner end plate and the outer end plate tend to approach each other, the two friction plates tend to move away from each other, the friction plate and the corresponding inner wall in the outer frame always maintain close contact, and the friction coefficient μ between the friction plate and the corresponding inner wall in the outer frame is greater than tanθ.

[0015] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the cross-sectional dimensions of the inner end plate in the self-locking assembly match the cross-sectional dimensions of the pressure plate.

[0016] Furthermore, in the above-mentioned energy dissipation and vibration reduction device based on porous materials, the return spring is always in a compressed state, and is mainly used to drive the self-locking component and the energy dissipation block that are not compressed by the external load to move, so that the energy dissipation block and the pressure plate and the inner end plate in the self-locking component always maintain close contact.

[0017] Working principle of the present invention:

[0018] When vibration occurs, the reasonable setting of the return spring and the self-locking assembly ensures that the energy-absorbing block based on the porous material always maintains close contact with the pressure plate and the inner end plate in the self-locking assembly. Therefore, no matter whether the push-pull rod is subjected to pressure or tension, the energy-absorbing block on one side will always be compressed to achieve the effect of continuous energy absorption.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention reasonably arranges the self-locking component and the return spring so that the energy-consuming block based on the porous material always keeps in close contact with the loading plate, thereby solving the problem that the porous material itself cannot be directly used for continuous energy consumption under reciprocating loads due to its own characteristics. The stable compression plastic platform section of the porous material is fully utilized to achieve continuous output and stable energy consumption during the working process.

[0021] 2. The overall structure of the device of the present invention is relatively simple, and it is easy to manufacture and easy to realize standardized production and application. It can achieve excellent energy consumption capacity without adding additional energy-consuming materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the energy dissipation and vibration reduction device of the present invention;

[0024] Figure 2 It is a front view of the energy dissipation and vibration reduction device of the present invention;

[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the outer frame in the present invention;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the pressure plate and the push-pull rod after being assembled in the present invention;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the self-locking component in the present invention.

[0028] Figure 6 It is a front view of the self-locking assembly of the present invention;

[0029] In the accompanying drawings, the reference numerals of the various components are as follows:

[0030] 1-outer frame, 101-groove frame plate, 102-fastener, 103-top frame plate, 104-first perforation, 105-connecting rod, 2-push-pull rod, 3-pressure plate, 4-energy dissipation block, 5-self-locking assembly, 501-inner end plate, 502-outer end plate, 503-friction plate, 504-first ear plate, 505-second perforation, 506-second ear plate, 507-third perforation, 508-third ear plate, 509-first connecting rod, 510-second connecting rod, 511-tension spring, 512-pin shaft, 6-reset spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 6As shown, this embodiment provides an energy dissipation and vibration reduction device based on porous materials, which includes an outer frame 1, a push-pull rod 2, a pressure plate 3, an energy dissipation block 4, a self-locking component 5 and a reset spring 6; a push-pull rod 2 is fixed through the pressure plate 3, and two energy dissipation blocks 4 are symmetrically installed on the push-pull rod 2 inside the outer frame 1 with the pressure plate 3 as the center plane, and the energy dissipation blocks 4 are made of porous materials; a self-locking component 5 is installed on the outside of each energy dissipation block 4 inside the outer frame 1, and the self-locking component 5 is installed on the push-pull rod 2 and maintains contact with the outer surface of the energy dissipation block 4 on its side; a reset spring 6 is installed between the outer frame 1 and the self-locking component 5.

[0033] In this embodiment, the outer frame 1 is an overall rectangular frame structure, and the outer frame 1 includes a grooved frame plate 101, a fastener 102, a top frame plate 103 and a connecting rod 105. The outer ends of the two side plates of the grooved frame plate 101 extend inward to form a convex plate parallel to the web. The convex plate is fixed to the top frame plate 103 by the fastener 102. The top frame plate 103 is provided with a first through hole 104 that cooperates with the push-pull rod 2. A connecting rod 105 that coincides with the axis of the push-pull rod 2 is fixed to the outer side of the web of the grooved frame plate 101.

[0034] In this embodiment, the top end of the push-pull rod 2 extends from the top frame plate 103 of the outer frame 1, and a displacement distance is reserved between the bottom end of the push-pull rod 2 and the inner side of the web of the grooved frame plate 101, which is greater than the designed displacement of the energy dissipation and vibration reduction device.

[0035] In this embodiment, the porous material is porous aluminum or porous steel, and the porous material can be placed in a plastic platform section after a certain pre-compression.

[0036] In this embodiment, the self-locking assembly 5 includes an inner end plate 501, an outer end plate 502, a friction plate 503, a first ear plate 504, a second ear plate 506, a third ear plate 508, a first connecting rod 509, a second connecting rod 510, a tension spring 511 and a pin 512. The first ear plate 504 is symmetrically fixed on the upper side of the inner end plate 501, a second through hole 505 cooperating with the push-pull rod 2 is opened at the center of the inner end plate 501, the second ear plate 506 is symmetrically fixed on the lower side of the outer end plate 502, and the outer end plate 509 is symmetrically fixed to the outer end plate 510. A third through hole 507 cooperating with the push-pull rod 2 is provided at the center of 502, and there are two friction plates 503 arranged opposite to each other. A third ear plate 508 is fixed to the inner side of the friction plate 503, a first connecting rod 509 is installed between the third ear plate 508 and the first ear plate 504, a second connecting rod 510 is installed between the third ear plate 508 and the second ear plate 506, and a tension spring 511 is sleeved on the outer side of the push-pull rod 2, and both ends of the tension spring 511 are respectively connected to the inner end plate 501 and the outer end plate 502.

[0037] In this embodiment, the two ends of the first connecting rod 509 are rotatably connected to the third ear plate 508 and the first ear plate 504 respectively through the pin shaft 512, and the two ends of the second connecting rod 510 are rotatably connected to the third ear plate 508 and the second ear plate 506 respectively through the pin shaft 512; the lengths of the first connecting rod 509 and the second connecting rod 510 are the same, and the angles between the first connecting rod 509 and the second connecting rod 510 and the horizontal plane are equal, and the angle is recorded as θ.

[0038] In this embodiment, the tension spring 511 in the self-locking component 5 is in a stretched state, the inner end plate 501 and the outer end plate 502 tend to approach each other, the two friction plates 503 tend to move away from each other, the friction plate 503 and the corresponding inner wall in the outer frame 1 always maintain close contact, and the friction coefficient μ between the friction plate 503 and the corresponding inner wall in the outer frame 1 is greater than tanθ.

[0039] In this embodiment, a gap of 3 to 5 mm is left between the two side ends of the pressing plate 3 and the inner side wall of the outer frame 1 to prevent the pressing plate 3 from contacting the inner side wall of the outer frame 1 .

[0040] In this embodiment, the cross-sectional dimensions of the inner end plate 501 in the self-locking assembly 5 match the cross-sectional dimensions of the pressing plate 3 .

[0041] In this embodiment, the return spring 6 is always in a compressed state, and is mainly used to drive the self-locking component 5 and the energy-absorbing block 4 that are not compressed by the external load to move, so that the energy-absorbing block 4 and the pressure plate 3 and the inner end plate 501 in the self-locking component 5 always maintain close contact.

[0042] A specific application of this embodiment is: when the device is vibrating, the reasonable setting of the self-locking component 5 and the reset spring 6 allows the energy-absorbing block 4 to always maintain close contact with the pressure plate 3 and the inner end plate 501 in the self-locking component 5. Therefore, no matter whether the push-pull rod 2 is subjected to pressure or tension, the energy-absorbing block 4 on one side is always subjected to compression to achieve the effect of continuous energy consumption. For example, when the push-pull rod 2 is subjected to tension, the inner end plate 501 in the upper self-locking component 5 is compressed by the external load, triggering the upper self-locking component 5 to activate the function of locking the position, and the push-pull rod 2 moves upward to drive the pressure plate 3 to compress the upper energy-absorbing block 4, while the lower reset spring 6 will synchronously drive the lower self-locking component 5 and the lower energy-absorbing block 4 to move along the loading direction, so that the lower energy-absorbing block 4 and the inner end plate 501 in the self-locking component 5 and the pressure plate 3 are always in close contact during the loading process.

[0043] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An energy dissipation and vibration reduction device based on porous materials, characterized in that: The energy dissipation and vibration reduction device comprises an outer frame, a push-pull rod, a pressure plate, an energy dissipation block, a self-locking assembly and a reset spring; a push-pull rod is fixed through the pressure plate, and two energy dissipation blocks sleeved on the push-pull rod are symmetrically installed inside the outer frame with the pressure plate as the center, and the energy dissipation blocks are made of porous material; a self-locking assembly is installed inside the outer frame on the outside of each energy dissipation block, and the self-locking assembly is sleeved on the push-pull rod and keeps in contact with the outer surface of the energy dissipation block on its side; a reset spring is installed between the outer frame and the self-locking assembly.

2. The energy dissipation and vibration reduction device based on porous materials according to claim 1, characterized in that: The outer frame is a rectangular frame structure as a whole, and the outer frame includes a grooved frame plate, fasteners, a top frame plate and a connecting rod. The outer ends of the two side plates of the grooved frame plate each extend inward to form a convex plate parallel to the web plate. The convex plate is fixed to the top frame plate by fasteners. A first through hole that cooperates with the push-pull rod is opened on the top frame plate. A connecting rod that coincides with the axis of the push-pull rod is fixed to the outer side of the web plate of the grooved frame plate.

3. The energy dissipation and vibration reduction device based on porous materials according to claim 2, characterized in that: The top end of the push-pull rod extends out from the top frame plate of the outer frame, and a displacement distance is reserved between the bottom end of the push-pull rod and the inner side of the web of the grooved frame plate, and the displacement distance is greater than the design displacement of the energy dissipation and vibration reduction device.

4. The energy dissipation and vibration reduction device based on porous materials according to claim 1, characterized in that: A gap of 3 to 5 mm is left between the two side ends of the pressing plate and the inner side wall of the outer frame.

5. The energy dissipation and vibration reduction device based on porous materials according to claim 1, characterized in that: The porous material is porous aluminum or porous steel, and the porous material can be placed in a plastic platform section after a certain pre-compression.

6. The energy dissipation and vibration reduction device based on porous materials according to claim 1, characterized in that: The self-locking assembly includes an inner end plate, an outer end plate, a friction plate, a first ear plate, a second ear plate, a third ear plate, a first connecting rod, a second connecting rod, a tension spring and a pin shaft. The first ear plate is symmetrically fixed to the upper side of the inner end plate, and a second through hole cooperating with the push-pull rod is opened at the center of the inner end plate. The second ear plate is symmetrically fixed to the lower side of the outer end plate, and a third through hole cooperating with the push-pull rod is opened at the center of the outer end plate. There are two friction plates that are arranged opposite to each other. A third ear plate is fixed to the inner side of the friction plate, a first connecting rod is installed between the third ear plate and the first ear plate, and a second connecting rod is installed between the third ear plate and the second ear plate. The tension spring is sleeved on the outer side of the push-pull rod, and both ends of the tension spring are respectively connected to the inner end plate and the outer end plate.

7. The energy dissipation and vibration reduction device based on porous materials according to claim 6, characterized in that: The two ends of the first connecting rod are rotatably connected to the third ear plate and the first ear plate through a pin shaft, and the two ends of the second connecting rod are rotatably connected to the third ear plate and the second ear plate through a pin shaft; the first connecting rod and the second connecting rod have the same length, and the first connecting rod and the second connecting rod each have an equal angle with the horizontal plane, which is denoted by θ.

8. The energy dissipation and vibration reduction device based on porous materials according to claim 7, characterized in that: The tension spring in the self-locking assembly is in a tensioned state, the inner end plate and the outer end plate tend to approach each other, the two friction plates tend to move away from each other, the friction plate and the corresponding inner wall in the outer frame always maintain close contact, and the friction coefficient μ between the friction plate and the corresponding inner wall in the outer frame is greater than tanθ.

9. The energy dissipation and vibration reduction device based on porous materials according to claim 6, characterized in that: The cross-sectional dimensions of the inner end plate in the self-locking assembly match the cross-sectional dimensions of the pressure plate.

10. The energy dissipation and vibration reduction device based on porous materials according to claim 6, characterized in that: The return spring is always in a compressed state, and is mainly used to drive the self-locking assembly and the energy-absorbing block that are not compressed by the external load to move, so that the energy-absorbing block and the inner end plate in the pressure plate and the self-locking assembly are always in close contact.

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