A three-dimensional shock absorbing device for large-span space structures

Abstract

The present invention belongs to the technical field of structural vibration control and shock absorption, and specifically relates to a three-dimensional shock absorbing device for a large-span space structure; it includes a horizontal shock absorbing assembly, a connecting frame and a vertical shock absorbing assembly; the horizontal shock absorbing assembly is mounted on both ends of a horizontal rod of the large-span space structure; the connecting frame is mounted on the middle of the rod and connected to the horizontal shock absorbing assembly, and the connecting frame can slide left and right and or swing back and forth along the horizontal rod, thereby squeezing the horizontal shock absorbing assembly to consume the vibration energy in the horizontal direction; the vertical shock absorbing assembly is connected to the connecting frame, and the vertical shock absorbing assembly can slide up and down along the connecting frame, thereby consuming the vibration energy in the vertical direction of the rod. The three-dimensional shock absorbing device is installed on the component, which can not only reduce the component vibration caused by an earthquake, but also offset the component vibration caused by the wind force, and is easy to install and easy to maintain.

Description

Technical Field

[0001] The invention belongs to the technical field of structural vibration control and shock absorption, and in particular relates to a three-dimensional shock absorption device for a large-span space structure. Background Art

[0002] All kinds of structures that span a space of more than 60 meters horizontally can be called long-span space structures. Commonly used long-span space structures include folded plate structures, shell structures, grid structures, cable structures, inflatable structures, tent tension structures, etc.

[0003] According to statistics, there are about 5 million earthquakes on the earth every year, that is, tens of thousands of earthquakes occur every day. Large earthquakes often bring serious casualties to humans and society and are accompanied by huge economic losses. my country has a vast geographical area and frequent earthquakes, so it is of great significance to do a good job in earthquake resistance and disaster prevention. Traditional shock absorption design relies on the damage of the structure and its load-bearing components to consume most of the energy input by the earthquake, which often leads to serious damage or collapse of the structural components. The seismic technology for large-span spatial structures is to set up seismic isolation and shock absorption devices at the bottom of the supporting columns of the building. The technologies currently being researched and developed include: sandwich rubber pad isolation, supported swing isolation, etc., to reduce structural vibration and prevent earthquake damage. However, the size of this device is very large, and it will cost a lot of money economically, and this device lacks adjustment capabilities. Summary of the invention

[0004] In order to avoid and overcome the technical problems existing in the prior art, the present invention provides a three-dimensional shock absorbing device for large-span spatial structures, which is adjusted to eliminate the vibration of components during an earthquake. It has a compact structure and is easy to install, and can achieve horizontal and vertical three-dimensional shock absorption.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A three-dimensional shock absorbing device for a large-span space structure, characterized in that it comprises a horizontal shock absorbing assembly, a connecting frame and a vertical shock absorbing assembly; the horizontal shock absorbing assembly is mounted on both ends of a horizontal rod of the large-span space structure; the connecting frame is mounted on the rod and connected to the horizontal shock absorbing assembly, and the connecting frame can slide left and right along the horizontal rod and / or move circumferentially around the rod, thereby squeezing the horizontal shock absorbing assembly to consume vibration energy in the horizontal direction; the vertical shock absorbing assembly is connected to the connecting frame, and the vertical shock absorbing assembly can slide up and down along the connecting frame, thereby consuming vibration energy in the vertical direction of the rod.

[0007] Preferably, the connecting frame includes vertical connecting brackets and transverse connecting plates on both sides; the top end of the vertical connecting bracket is slidably mounted on the rod and connected to the horizontal shock absorbing components at both ends; the two ends of the transverse connecting plate are respectively fixedly connected to the vertical connecting brackets on both sides.

[0008] Preferably, the horizontal shock absorbing assembly includes a fastener and an SMA spring; the fastener is fixedly connected to both ends of the rod, and the SMA spring is sleeved on both ends of the rod, one end is connected to the fastener, and the other end is connected to the top end of the vertical connecting bracket.

[0009] Preferably, the vertical shock absorbing assembly includes a gravity block, an adjustable rod, a spring and a docking plate; the docking plate and the vertical connecting bracket are both provided with long groove-shaped bolt holes; the docking plate is vertically connected to both ends of the gravity block, and is slidably connected to the vertical connecting bracket by bolts; the upper end of the spring is fixedly connected to the transverse connecting plate, and the lower end is fixedly connected to the gravity block; the upper end of the adjustable rod is fixedly connected to the transverse connecting plate, and the lower end is fixedly connected to the gravity block.

[0010] Preferably, the upper end of the adjustable rod is a hollow cylinder and the lower end is a hollow sleeve; the top end of the hollow cylinder is fixedly connected to the transverse connecting plate; the bottom end of the hollow sleeve is fixedly connected to the gravity block; the hollow cylinder is mounted in the hollow sleeve and can be telescopically slidable in the axial direction; the interiors of the hollow cylinder and the hollow sleeve are both filled with magnetorheological fluid; when not vibrating, the magnetorheological fluid is energized, the hollow cylinder and the hollow sleeve produce mutual attraction and are adsorbed together, thereby lifting the gravity block; when vibrating, the magnetorheological fluid is de-energized, the attraction between the hollow cylinder and the hollow sleeve disappears, and they separate, thereby lowering the gravity block; under the action of the vibration force, the gravity block vibrates up and down to pull the extrusion spring to consume the vibration energy in the vertical direction.

[0011] Preferably, the length of the spring in a static state is the same as the length of the hollow cylinder and the hollow sleeve after being adsorbed together.

[0012] Preferably, it also includes an intelligent electromagnetic relay; the magnetorheological fluid is connected to the intelligent electromagnetic relay through a wire; the wire and the intelligent electromagnetic relay are arranged on a rod; the intelligent electromagnetic relay senses the vibration of the rod to energize and deenergize the magnetorheological fluid.

[0013] Preferably, the intelligent electromagnetic relay is a combination of a vibration switch and an electromagnetic relay commonly used in the market.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention replaces the traditional column isolation shock-absorbing device with a three-dimensional shock-absorbing device, which can not only reduce the vibration of the large-span space structure caused by the earthquake, but also offset the vibration of the large-span space structure caused by the wind force.

[0016] 2. The three-dimensional shock-absorbing device is installed on the rods of the large-span space structure. It is easy to install and maintain, and can better and more evenly eliminate the vibration of the large-span space structure.

[0017] 3. The present invention installs magnetorheological fluid and a controller inside the adjusting rod, so that when the large-span structure is vibrated, the three-dimensional shock absorbing device can automatically adjust to eliminate the vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the vertical shock absorbing module in the present invention.

[0020] Figure 3 It is a front view of the connection shell in the present invention.

[0021] Figure 4 It is a left side view of the connection shell in the present invention.

[0022] Figure 5 It is a cross-sectional view of the adjustable rod in the present invention.

[0023] The actual correspondence between the reference numerals and component names of the present invention is as follows:

[0024] 10- rod 11- SMA spring 12- fastener

[0025] 20-vertical connecting bracket 21-horizontal connecting plate

[0026] 30- Gravity block 31- Adjustable rod 32 Spring 33- Docking plate

[0027] 311-Hollow Cylinder 312-Hollow Sleeve

[0028] 40-Bolt DETAILED DESCRIPTION

[0029] 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.

[0030] Example 1

[0031] like Figure 1-3As shown, a three-dimensional shock absorbing device for a large-span space structure is characterized in that it includes a horizontal shock absorbing assembly, a connecting frame and a vertical shock absorbing assembly; the horizontal shock absorbing assembly is mounted on both ends of a horizontal rod 10 of the large-span space structure; the connecting frame is mounted on the rod 10 and connected to the horizontal shock absorbing assembly, and the connecting frame can slide left and right and / or swing back and forth along the horizontal rod 10, thereby squeezing the horizontal shock absorbing assembly to consume the vibration energy in the horizontal direction; the vertical shock absorbing assembly is connected to the connecting frame, and the vertical shock absorbing assembly can slide up and down along the connecting frame, thereby consuming the vibration energy of the rod in the vertical direction.

[0032] The connecting frame includes vertical connecting brackets 20 and horizontal connecting plates 21 on both sides; the top end of the vertical connecting bracket 20 is slidably mounted on the rod 10 and connected to the horizontal shock absorbing components at both ends; the two ends of the horizontal connecting plate 21 are respectively fixedly connected to the vertical connecting brackets 20 on both sides.

[0033] The horizontal shock absorbing assembly includes a fastener 12 and an SMA spring 11; the fastener 12 is fixedly connected to both ends of the rod 10, and the SMA spring 11 is sleeved on both ends of the rod 10, one end of which is connected to the fastener 12, and the other end is connected to the top of the vertical connection bracket 20. The SMA spring 11 has a superelastic property, which produces a large deformation and can return to the shape before deformation after the external force is removed, and the stress-strain relationship presents a nonlinear characteristic, which will generate dissipated energy.

[0034] Example 2

[0035] On the basis of Example 1, Figure 2 and Figure 5 As shown, the vertical shock absorbing assembly includes a gravity block 30, an adjustable rod 31, a spring 32 and a docking plate 33; the docking plate 33 and the vertical connecting bracket 20 are both provided with long groove-shaped bolt holes; the docking plate 33 is vertically connected to the two ends of the gravity block 30, and is slidably connected to the vertical connecting bracket 20 by bolts 40; the upper end of the spring 32 is fixedly connected to the transverse connecting plate 21, and the lower end is fixedly connected to the gravity block 30; the upper end of the adjustable rod 31 is fixedly connected to the transverse connecting plate 21, and the lower end is fixedly connected to the gravity block 30.

[0036] The upper end of the adjustable rod 31 is a hollow cylinder 311, and the lower end is a hollow sleeve 312; the top of the hollow cylinder 311 is fixedly connected to the horizontal connecting plate 21; the bottom end of the hollow sleeve 312 is fixedly connected to the gravity block 30; the hollow cylinder 311 is sleeved in the hollow sleeve 312 and can be telescopically slidable in the axial direction; the interiors of the hollow cylinder 311 and the hollow sleeve 312 are both filled with magnetorheological fluid; when not vibrating, the magnetorheological fluid is energized, the hollow cylinder 311 and the hollow sleeve 312 produce mutual attraction and adsorb together, thereby lifting the gravity block 30; when vibrating, the magnetorheological fluid is powered off, the gravitational force between the hollow cylinder 311 and the hollow sleeve 312 disappears, thereby putting down the gravity block 30; under the action of the vibration force, the gravity block 30 vibrates up and down to pull the extrusion spring 32 to consume the vibration energy in the vertical direction.

[0037] The length of the spring 32 in the static state is the same as the length after the hollow cylinder 311 and the hollow sleeve 312 are adsorbed together, thereby ensuring that when the adsorption force between the hollow cylinder 311 and the hollow sleeve 312 disappears, the gravity block 30 will be pulled by the spring 32 when falling.

[0038] Example 3

[0039] On the basis of Example 3, Figure 2 , 4 As shown, the butt plate 33 and the connecting plate 20 are both provided with long slot-shaped bolt holes, so that the bolts 40 can slide synchronously in the long slot-shaped bolt holes as the vertical shock-absorbing assembly vibrates up and down. This ensures that when an earthquake occurs, the vertical movement distance of the gravity block 30 is limited to a certain range, so as to avoid the spring 32 from being overstretched and unable to recover.

[0040] The intelligent electromagnetic relay is a combination of a vibration switch and an electromagnetic relay commonly used in the market, with mature technology and low cost.

[0041] The working principle of the present invention is as follows:

[0042] This three-dimensional shock absorbing device is in a static state when it is not in an earthquake state. When an earthquake occurs, the rods of the large-span space structure will shake or vibrate during the vibration process. After the earthquake energy input in the horizontal direction causes shaking or vibration, the gravity block 30 and the vertical connection bracket 20 will tilt and shake, thereby driving the vertical connection bracket 20 to slide left and right along the rod 10 or swing around the rod 10, and consuming energy by squeezing the SMA spring 11 on the rod 10. After the vibration caused by the earthquake energy input vertically, the magnetorheological fluid in the adjustable rod 31 is actively powered off due to the vibration of the external intelligent electromagnetic relay, and no current passes. As a result, the mutual attraction between the upper and lower ends of the adjusting rod 31 disappears. At this time, the mechanical properties of the adjusting rod 31 are similar to those of a low-rigidity spring or no connection. The gravity block 30 that loses the traction of the adjusting rod 31 will pull or squeeze the spring 32 during the up and down vibration, and consumes energy by squeezing the spring 32 and the adjustable rod 31. After the earthquake occurs, the large-span spatial structure eliminates vibrations under the action of the three-dimensional shock-absorbing device, the intelligent electromagnetic relay is re-energized, and the three-dimensional shock-absorbing device returns to a static state.

[0043] The above description is only a preferred specific implementation manner 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 scheme and inventive concept 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 three-dimensional shock absorbing device for a large-span space structure, characterized in that: It comprises a horizontal shock absorbing assembly, a connecting frame and a vertical shock absorbing assembly; the horizontal shock absorbing assembly is sleeved on both ends of a horizontal rod (10) of a large-span space structure; the connecting frame is sleeved on the horizontal rod (10) and connected to the horizontal shock absorbing assembly, and the connecting frame can slide left and right along the horizontal rod (10) and / or move circumferentially around the horizontal rod (10), thereby squeezing the horizontal shock absorbing assembly to consume vibration energy in the horizontal direction; the vertical shock absorbing assembly is connected to the connecting frame, and the vertical shock absorbing assembly can slide up and down along the connecting frame, thereby consuming vibration energy in the vertical direction of the horizontal rod; The connecting frame comprises vertical connecting brackets (20) and transverse connecting plates (21) on both sides; the top end of the vertical connecting bracket (20) is slidably mounted on the horizontal rod (10) and connected to the horizontal shock absorbing components at both ends; the two ends of the transverse connecting plate (21) are respectively fixedly connected to the vertical connecting brackets (20) on both sides; The horizontal shock absorbing assembly comprises a fastener (12) and an SMA spring (11); the fastener (12) is fixedly connected to the two ends of the horizontal rod (10); the SMA spring (11) is sleeved on the two ends of the horizontal rod (10), one end of which is connected to the fastener (12) and the other end of which is connected to the top end of the vertical connection bracket (20); The vertical shock absorbing assembly comprises a gravity block (30), an adjustable rod (31), a spring (32) and a docking plate (33); the docking plate (33) and the vertical connection bracket (20) are both provided with long slot-shaped bolt holes; the docking plate (33) is vertically connected to both ends of the gravity block (30), and is slidably connected to the vertical connection bracket (20) through bolts (40) passing through the long slot-shaped bolt holes; the upper end of the spring (32) is fixedly connected to the transverse connection plate (21), and the lower end is fixedly connected to the gravity block (30); the upper end of the adjustable rod (31) is fixedly connected to the transverse connection plate (21), and the lower end is fixedly connected to the gravity block (30); The upper end of the adjustable rod (31) is a hollow column (311), and the lower end is a hollow sleeve (312); the top end of the hollow column (311) is fixedly connected to the transverse connecting plate (21); the bottom end of the hollow sleeve (312) is fixedly connected to the gravity block (30); the hollow column (311) is sleeved in the hollow sleeve (312) and can be telescopically slidable along the axial direction; the interiors of the hollow column (311) and the hollow sleeve (312) are both filled with magnetorheological fluid; When not vibrating, the magnetorheological fluid is energized, the hollow column (311) and the hollow sleeve (312) generate mutual attraction and are adsorbed together, thereby lifting the gravity block (30); when vibrating, the magnetorheological fluid is de-energized, the attraction between the hollow column (311) and the hollow sleeve (312) disappears, thereby lowering the gravity block (30); under the action of the vibration force and the spring (32), the gravity block (30) vibrates up and down, pulling and squeezing the spring (32) to consume vibration energy in the vertical direction.

2. A three-dimensional shock absorbing device for a large-span space structure according to claim 1, characterized in that: The length of the spring (32) in a static state is the same as the length of the hollow cylinder (311) and the hollow sleeve (312) after being adsorbed together.

3. A three-dimensional shock absorbing device for a large-span space structure according to claim 1, characterized in that: It also includes an intelligent electromagnetic relay; the magnetorheological fluid in the hollow cylinder (311) and the hollow sleeve (312) are connected to the intelligent electromagnetic relay via a wire; the wire and the intelligent electromagnetic relay are arranged on a horizontal rod (10); the intelligent electromagnetic relay senses the vibration of the horizontal rod (10) to energize and deenergize the magnetorheological fluid.

4. A three-dimensional shock absorbing device for a large-span space structure according to claim 3, characterized in that: The intelligent electromagnetic relay is a combination of a vibration switch and an electromagnetic relay commonly used in the market.

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