A periodic yield buckling compression rod vibration reduction device

Abstract

The present application relates to the technical field of vibration reduction devices, and discloses a periodic yield buckling bar vibration reduction device, including: an upper bearing plate and a lower bearing plate, both of which are used to connect to an external structure; at least two groups of vibration reduction devices, which are arranged between the upper bearing plate and the lower bearing plate, each group of vibration reduction devices is divided into two units, each unit includes a flexible eccentric portion arranged in a transverse U shape and two rigid yield buckling bars, the two yield buckling bars are respectively installed on both sides of the flexible eccentric portion, and the two yield buckling bars are movably connected at their distal ends to the adjacent sides of the upper bearing plate and the lower bearing plate. By arranging a combined structure of a flexible eccentric portion and a yield buckling bar between the upper bearing plate and the lower bearing plate, it is possible to achieve energy dissipation under the action of vibration loads through the deformation of the flexible eccentric portion and the buckling instability of the yield buckling bar, effectively suppress vibration, and improve the stability of the structure.

Description

Technical Field

[0001] The invention relates to the technical field of vibration reduction devices, in particular to a periodic yield buckling compression rod vibration reduction device. Background Art

[0002] Vibration damping devices are important structural elements widely used in buildings, bridges, mechanical equipment, automobiles and other fields. Their main purpose is to reduce the impact of external vibration loads on structures or equipment, thereby improving the stability and service life of the system. In the field of construction, vibration damping devices can effectively alleviate structural vibrations caused by earthquakes and wind loads, and improve the seismic resistance of buildings; in bridges, they can reduce the impact of vehicle passage or environmental vibration on bridge structures and extend their service life; in mechanical equipment and automobiles, vibration suppression can reduce component wear, improve work efficiency and improve the user experience. Therefore, vibration damping devices play an irreplaceable role in improving structural reliability and operating performance.

[0003] Although existing vibration reduction devices can achieve vibration control and energy dissipation to a certain extent, there are still many deficiencies in practical applications. First, traditional vibration reduction devices usually rely on a single energy dissipation mechanism, which makes it difficult to meet the dual requirements of vibration energy dissipation and vibration isolation performance; second, the material selection and structural design of existing devices lack flexibility, making it difficult to adapt to the requirements of multi-frequency loads in complex vibration environments; in addition, some devices are prone to fatigue failure under vibration loads, and their repeated use performance is poor, which limits their service life and economy. Therefore, how to design a vibration reduction device that has both efficient vibration energy dissipation, wide-band vibration isolation performance, and long life characteristics has become a technical problem that needs to be solved urgently at this stage. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a periodic yield buckling compression rod vibration reduction device, which solves the problems of low energy dissipation efficiency, limited vibration isolation performance, insufficient structural adaptability and poor reusability of the prior art vibration reduction devices.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a periodic yield buckling compression rod vibration reduction device, comprising:

[0006] The upper bearing plate and the lower bearing plate are both used to connect with the external structure;

[0007] At least two groups of vibration reduction devices are arranged between the upper bearing plate and the lower bearing plate, each group of vibration reduction devices is divided into two units, each unit includes a flexible eccentric portion arranged in a transverse U shape and two rigid yielding and buckling pressure bars, the two yielding and buckling pressure bars are respectively installed on both sides of the flexible eccentric portion, and the far ends of the two yielding and buckling pressure bars are respectively movably connected to the proximal sides of the upper bearing plate and the lower bearing plate.

[0008] Preferably, the material of the flexible eccentric part is one of a polymer elastomer or a metal elastic material, so as to make the yield strength of the flexible eccentric part match the buckling strength of the yield buckling compression rod.

[0009] Preferably, the transverse U-shaped structure of the flexible eccentric portion adjusts its yield strength by adjusting its opening angle or slenderness ratio to meet the requirements under different vibration load conditions.

[0010] Preferably, the yielding compression rod is a hollow tubular structure, which is used to reduce the overall weight of the device.

[0011] Preferably, a rotating joint is provided at the end of the yielding compression rod, a connecting rod is connected to one side of the rotating joint, and the end of the connecting rod is connected to the adjacent sides of the upper bearing plate and the lower bearing plate.

[0012] Preferably, the end of the yielding and buckling pressure rod is provided with a thread, the outer wall of the flexible eccentric part is provided with a screw hole, and the yielding and buckling pressure rod is threadedly connected in the screw hole.

[0013] Preferably, the openings of the two flexible eccentric parts in the same group of the vibration damping devices are close to each other to form a cellular structure, and a number of the vibration damping devices are arranged at equal intervals to form a periodic structure, and the periodic structure is used to generate a vibration damping frequency band to isolate vibrations within the frequency range.

[0014] Preferably, the periodic structure is used to increase the vibration frequency range covered by the vibration reduction frequency band by adjusting the opening angle of the flexible eccentric portion and the arrangement spacing of the vibration reduction device.

[0015] Preferably, the device is used for vibration suppression of buildings, bridges and mechanical equipment.

[0016] The present invention provides a periodic yield buckling compression rod vibration reduction device, which has the following beneficial effects:

[0017] 1. The present invention provides a combined structure of a flexible eccentric portion and a yielding buckling strut between the upper bearing plate and the lower bearing plate. Under the action of vibration load, the deformation of the flexible eccentric portion cooperates with the buckling instability of the yielding buckling strut to achieve energy dissipation, effectively suppress vibration, and improve the stability of the structure.

[0018] 2. The present invention adopts the transverse U-shaped design of the flexible eccentric part, which can flexibly adapt to the needs under different vibration conditions by adjusting its opening angle or aspect ratio, and achieve precise isolation and dissipation effects for vibrations of specific frequencies, thereby greatly improving the adaptability and efficiency of vibration reduction performance.

[0019] 3. The present invention arranges a vibration reduction device consisting of a plurality of flexible eccentric parts and yielding buckling bars at equal intervals to form a periodic structure, which can generate a vibration reduction frequency band in the vibration spectrum, isolate vibrations within a specific frequency range, and significantly improve the vibration isolation performance of the vibration reduction device in a complex environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the yielding and buckling strut structure of the present invention;

[0022] Figure 3 is a cross-sectional view of a rotary joint of the present invention;

[0023] Figure 4 It is a cross-sectional view of the flexible eccentric portion of the present invention.

[0024] Among them, 1. upper bearing plate; 2. lower bearing plate; 3. vibration reduction device; 31. flexible eccentric part; 32. yielding and buckling compression rod; 4. rotating joint; 5. connecting rod; 6. screw hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the specification 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.

[0026] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0027] Please refer to the attached Figure 1 -Attached Figure 4 The embodiment of the present invention provides a periodic yield buckling compression rod vibration reduction device, comprising: an upper bearing plate 1 and a lower bearing plate 2, both of which are used to connect to an external structure; at least two groups of vibration reduction devices 3, which are arranged between the upper bearing plate 1 and the lower bearing plate 2, each group of vibration reduction devices 3 is divided into two units, each unit includes a flexible eccentric portion 31 arranged in a transverse U shape and two rigid yield buckling compression rods 32, the two yield buckling compression rods 32 are respectively installed on both sides of the flexible eccentric portion 31, and the distal ends of the two yield buckling compression rods 32 are movably connected to the proximal sides of the upper bearing plate 1 and the lower bearing plate 2.

[0028] In the present invention, the upper bearing plate 1 and the lower bearing plate 2 are used to be connected to the external structure respectively, and play the role of transmitting vibration load and fixing the vibration reduction device 3; at least two groups of vibration reduction devices 3 are installed between the upper bearing plate 1 and the lower bearing plate 2 to form a vibration load transmission path. Each group of vibration reduction devices 3 is divided into two units, wherein each unit is composed of a flexible eccentric portion 31 arranged in a transverse U shape and two rigid yielding buckling pressure bars 32. The transverse U-shaped design of the flexible eccentric portion 31 enables it to dissipate vibration energy through deformation, and at the same time provides connection support for the rigid yielding buckling pressure bars 32 on both sides. The two yielding buckling pressure bars 32 are respectively installed on both sides of the flexible eccentric portion 31, and are movably connected to the adjacent sides of the upper bearing plate 1 and the lower bearing plate 2 through their distal ends, and can buckle and become unstable under the action of vibration load, further achieving energy dissipation and maintaining the dynamic stability of the vibration reduction device 3.

[0029] The material of the flexible eccentric portion 31 is one of a polymer elastomer or a metal elastic material, so as to make the yield strength of the flexible eccentric portion 31 match the buckling strength of the yield buckling compression rod 32 .

[0030] In the present invention, the material of the flexible eccentric part 31 is selected from one of polymer elastomers or metal elastic materials. Such materials have excellent elastic deformation capacity and yield performance, and can quickly enter a yield state under the action of vibration loads. At the same time, by adjusting its material properties, the yield strength of the flexible eccentric part 31 is matched with the buckling strength of the yielding buckling pressure bar 32. Therefore, during the vibration load transmission process, the flexible eccentric part 31 is ensured to work in coordination with the buckling pressure bar, so that it can achieve efficient energy dissipation effect when buckling instability occurs, thereby significantly improving the vibration reduction performance and stability of the vibration reduction device 3, and the polymer elastomer includes:

[0031] Natural rubber (NR), which has high elasticity and excellent fatigue resistance, is suitable for withstanding repeated vibrations and large deformations, and can be used for vibration reduction situations requiring high elasticity and repeated yielding;

[0032] Nitrile rubber (NBR), which has good oil and wear resistance and certain elasticity, is suitable for medium-load vibration environments and vibration reduction in industrial equipment with oil environments;

[0033] Polyurethane elastomer (PU), which has excellent wear resistance and high-strength fatigue resistance, as well as good deformation recovery ability, is suitable for long-term use, repeated yielding and buckling in high-load vibration environments;

[0034] Silicone rubber (SiR) has excellent high and low temperature resistance, good stability, stable chemical properties and good insulation performance. It is suitable for occasions with large temperature changes and complex environments, such as bridges and building vibration reduction.

[0035] Metal elastic materials include:

[0036] Spring steel (65Mn) has high elasticity and yield strength, good fatigue performance, and can withstand large amplitude buckling loads. It is suitable for vibration reduction situations that require high load-bearing capacity and fatigue resistance.

[0037] Stainless steel (304 or 316L) has good elastic recovery, corrosion resistance and high strength, and good fatigue resistance. It is suitable for vibration control devices in wet or corrosive environments, such as marine structures or outdoor buildings.

[0038] Beryllium copper alloy (BeCu) has excellent elasticity and fatigue strength, good conductivity, high stability, and can maintain performance for a long time. It is suitable for vibration systems with high precision and high elasticity requirements.

[0039] Titanium alloy (Ti-6Al-4V) is lightweight, high-strength, excellent fatigue resistance, good corrosion resistance and elasticity. It is suitable for applications that have dual requirements for weight and strength, such as high-end equipment or vibration reduction systems in the aviation field.

[0040] The transverse U-shaped structure of the flexible eccentric portion 31 can adjust its yield strength by adjusting its opening angle or slenderness ratio to meet the requirements under different vibration load conditions.

[0041] In the present invention, the flexible eccentric portion 31 is designed as a transverse U-shaped structure, which enables it to have a strong deformation adaptability when subjected to vibration loads. By adjusting the opening angle of the flexible eccentric portion 31, its yield deformation path after being subjected to force can be changed, so that its yield strength can be flexibly adjusted to adapt to different vibration frequencies or amplitudes. At the same time, by adjusting the slenderness ratio of the flexible eccentric portion 31, the mechanical properties of its yield point can be further optimized to ensure that the ideal energy dissipation effect is achieved under specific vibration load conditions. Therefore, it is possible to effectively enhance the adaptability of the vibration reduction device 3, meet the various vibration load requirements in complex environments, and significantly improve the performance and reliability of the device.

[0042] The yielding and buckling pressure rod 32 is a hollow tubular structure, which is used to reduce the overall weight of the device. A rotating joint 4 is provided at the end of the yielding and buckling pressure rod 32, and a connecting rod 5 is connected to one side of the rotating joint 4. The ends of the connecting rod 5 are connected to the adjacent sides of the upper bearing plate 1 and the lower bearing plate 2. The end of the yielding and buckling pressure rod 32 is provided with a thread, and a screw hole 6 is opened on the outer wall of the flexible eccentric part 31. The yielding and buckling pressure rod 32 is threadedly connected in the screw hole 6.

[0043] In the present invention, the yielding buckling pressure rod 32 adopts a hollow tubular structure, and the overall weight of the device is reduced by reducing the amount of material, thereby improving the installation convenience and operation efficiency of the device. A rotating joint 4 is provided at the end of the yielding buckling pressure rod 32, and one side of the rotating joint 4 is connected to the adjacent sides of the upper bearing plate 1 and the lower bearing plate 2 through a connecting rod 5, so that the pressure rod can rotate freely under the action of dynamic loads, thereby adapting to vibration deformation in different directions and ensuring the dynamic stability of the device. In addition, the end of the yielding buckling pressure rod 32 is provided with a thread, and the outer wall of the flexible eccentric part 31 is provided with a screw hole 6 that matches it, and the pressure rod and the flexible eccentric part 31 are reliably fixed by a threaded connection. It not only enhances the stability of the structure, but also provides convenience for the installation, disassembly and maintenance of the device, while ensuring the coordination and efficiency of each component during the working process.

[0044] The openings of the two flexible eccentric parts 31 in the same group of vibration reduction devices 3 are close to each other to form a cellular structure. After a plurality of vibration reduction devices 3 are arranged at equal intervals, a periodic structure is formed. The periodic structure is used to generate a vibration reduction frequency band to isolate vibrations within a frequency range. The periodic structure is used to increase the vibration frequency range covered by the vibration reduction frequency band by adjusting the opening angle of the flexible eccentric part 31 and the arrangement spacing of the vibration reduction devices 3.

[0045] In the present invention, the two flexible eccentric parts 31 in the same group of vibration reduction devices 3 form a compact cellular structure by bringing the openings close to each other, so that the group of devices can work together under the vibration load to enhance the vibration absorption effect. After a number of groups of vibration reduction devices 3 are arranged at equal intervals, they form an overall periodic structure, and through the geometric characteristics of the periodic arrangement, a vibration reduction frequency band is generated in the vibration spectrum, thereby achieving effective isolation of vibrations within a specific frequency range.

[0046] The device is used to suppress vibration of buildings, bridges and mechanical equipment.

[0047] In the present invention, the vibration reduction device 3 can be widely used in vibration suppression of buildings, bridges and mechanical equipment. Through its structural design and efficient vibration energy dissipation capacity, it exhibits excellent vibration reduction effects in a variety of complex vibration environments. For buildings, the device can effectively alleviate structural vibrations caused by earthquakes or wind loads, thereby improving the safety and service life of the building; in bridges, the device can reduce the structural dynamic response caused by vehicle passage or environmental vibrations, ensuring the stability and durability of the bridge; for mechanical equipment, the device suppresses vibrations during operation, reduces wear and fatigue of mechanical parts, extends the service life of the equipment and improves work efficiency, thereby demonstrating a wide range of engineering use value and economic benefits;

[0048] The present invention is not only applicable to vibration suppression of buildings, bridges and mechanical equipment, but can also be widely used in automobiles and other fields that require vibration reduction components. In the automotive field, the device can effectively reduce the dynamic response of the vehicle body caused by road bumps or engine vibrations, thereby improving the driving stability and riding comfort of the vehicle; in addition, for other equipment or systems that require vibration reduction, such as precision instruments, wind power generation equipment or aerospace structures, the device can improve the working performance and reliability of the equipment through efficient vibration energy dissipation and frequency band isolation functions, thereby showing wide adaptability and engineering value.

[0049] Working principle: When in use, the shock absorbing device is first installed between the upper bearing plate 1 and the lower bearing plate 2, and then the upper bearing plate 1 and the lower bearing plate 2 are connected to the mounting component. When the mounting component vibrates, the vibration will be transmitted to the shock absorbing device along the upper bearing plate 1 or the lower bearing plate 2. At this time, the flexible eccentric part 31 will bear the vibration load and gradually enter the yield state, dissipating part of the energy through its own deformation;

[0050] As the yield deformation of the flexible eccentric portion 31 intensifies, the vibration load is gradually transmitted to the yield buckling compression rod 32. When the compression rod reaches the critical buckling strength, buckling instability occurs, forming a large deformation process and further dissipating the vibration energy. At the same time, the flexible eccentric portion 31 is set to a transverse U-shape. Therefore, when the two sides of the opening of the flexible eccentric portion 31 contact each other, this is the maximum yield deformation of the flexible eccentric portion 31, which can limit the buckling range of the compression rod, so that the shock absorbing device remains stable in dynamic response. The periodic structure formed by arranging multiple shock absorbing devices at equal intervals can generate a vibration reduction frequency band to isolate vibrations in a specific frequency range, thereby achieving an efficient vibration suppression effect, and ultimately ensuring the stability and service life of the device and installed components.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A periodic yield buckling compression rod vibration reduction device, characterized in that: include: The upper bearing plate (1) and the lower bearing plate (2) are both used to connect to an external structure; At least two groups of vibration reduction devices (3) are arranged between the upper bearing plate (1) and the lower bearing plate (2), each group of vibration reduction devices (3) is divided into two units, each unit comprises a flexible eccentric portion (31) arranged in a transverse U-shape and two rigid yielding and buckling pressure bars (32), the two yielding and buckling pressure bars (32) are respectively installed on both sides of the flexible eccentric portion (31), and the two yielding and buckling pressure bars (32) are respectively movably connected at their far ends to the proximal sides of the upper bearing plate (1) and the lower bearing plate (2), the material of the flexible eccentric portion (31) is one of a polymer elastomer or a metal elastic material, and is used to make the yield strength of the flexible eccentric portion (31) match the yielding and buckling pressure bars. The buckling strength of the compression rod (32); the yield strength of the transverse U-shaped structure of the flexible eccentric part (31) is adjusted by adjusting its opening angle or slenderness ratio to meet the requirements under different vibration load conditions; the openings of the two flexible eccentric parts (31) in the same group of the vibration reduction devices (3) are close to each other to form a cellular structure; a plurality of the vibration reduction devices (3) are arranged at equal intervals to form a periodic structure; the periodic structure is used to generate a vibration reduction frequency band to isolate vibrations within a frequency range; the periodic structure is used to increase the vibration frequency range covered by the vibration reduction frequency band by adjusting the opening angle of the flexible eccentric part (31) and the arrangement spacing of the vibration reduction devices (3).

2. The cyclic yield buckling strut vibration reduction device according to claim 1, characterized in that: The yielding and buckling compression rod (32) is a hollow tubular structure and is used to reduce the overall weight of the device.

3. The cyclic yield buckling strut vibration reduction device according to claim 1, characterized in that: The end of the yielding compression rod (32) is provided with a rotating joint (4), one side of the rotating joint (4) is connected to a connecting rod (5), and the end of the connecting rod (5) is connected to the adjacent sides of the upper bearing plate (1) and the lower bearing plate (2).

4. The cyclic yield buckling strut vibration reduction device according to claim 1, characterized in that: The end of the yielding buckling pressure rod (32) is provided with a thread, the outer wall of the flexible eccentric portion (31) is provided with a screw hole (6), and the yielding buckling pressure rod (32) is threadedly connected in the screw hole (6).

5. The cyclic yield buckling strut vibration reduction device according to claim 1, characterized in that: The device is used for vibration suppression of buildings, bridges and mechanical equipment.

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