Intelligent damping support device for pipeline based on magneto-rheological elastomer and bistable beam

Abstract

The application provides a pipeline intelligent damping support device based on a magneto-rheological elastomer and a bistable beam, relates to the technical field of pipeline damping support, and comprises a support which comprises a frame body and a ferromagnetic connecting rod; an adjustable damping support which comprises a magnetic conducting cylinder, a magneto-rheological elastomer group, a coil and a power supply controller; a variable bistable beam structure which comprises a bistable buckling beam and electric telescopic pieces, the output ends of the two electric telescopic pieces push the middle part of the bistable buckling beam to move away from / close to the inner bottom wall of the magnetic conducting cylinder; and a monitoring mechanism which controls the size of the current output by the coil and the telescopic length of the output end of the electric telescopic piece, so that the combination of the adjustable damping support and the variable bistable beam structure can always keep quasi-zero dynamic stiffness in a balance position and in a wide displacement amplitude range. The damping support device in the application has the effects of high stability and strong vibration isolation.

Description

Technical Field

[0001] This application relates to the field of pipeline vibration reduction support technology, and in particular to a smart pipeline vibration reduction support device based on magnetorheological elastomer and bistable beam. Background Technology

[0002] Pipelines, used to transport working fluids such as water, oil, and gas, function similarly to blood vessels in the human body and are widely used in shipbuilding, aerospace, and petrochemical industries. During operation, pipelines are highly susceptible to vibration due to external vibration excitation sources and internal pressure pulsations and eddies. Mild vibration can lead to loosening of pipe bolts and fatigue damage, while severe vibration can cause liquid leaks, pipe ruptures, and even fires and explosions. To prevent these accidents, necessary technical measures must be taken to suppress pipeline vibration.

[0003] Traditional technical solutions primarily involve installing passive vibration isolation devices, including damping, stiffness, and mass units, on pipelines in the form of vibration isolation supports. These supports suppress pipeline vibration and reduce its transmission to the fixed end by consuming vibrational energy. However, once installed, the mechanical parameters of these passive vibration isolation supports remain constant. As the load rate of the transported medium changes, the natural frequency of the entire pipeline-vibration isolation support system shifts. When the vibration frequency of the external excitation source approaches the system's natural frequency, the pipeline can still experience resonance with significant deformation, limiting its effectiveness in suppressing pipeline vibration. Furthermore, for practical application, pipeline vibration isolation supports should ensure that the pipeline remains fixed in the same location under different load rates; otherwise, pipeline breakage may occur. Therefore, maintaining stable equilibrium and strong vibration isolation at the same equilibrium position under different load rates is a pressing issue in pipeline vibration isolation. Summary of the Invention

[0004] To address the limitations of existing passive vibration isolation devices in suppressing pipeline vibration under different working fluid load rates and the tendency for their equilibrium positions to change, this application provides an intelligent pipeline vibration reduction support device based on a magnetorheological elastomer and a bistable beam.

[0005] The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams provided in this application adopts the following technical solution: A smart vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams, comprising: A support frame for installing pipes, the support frame including a frame for fixing the pipes and a ferromagnetic connecting rod fixedly installed on the frame; An adjustable vibration damping support is used to provide vibration damping support for a ferromagnetic connecting rod. The adjustable vibration damping support includes a magnetic cylinder, two sets of magnetorheological elastomers fixedly installed inside the magnetic cylinder, a coil located between the two sets of magnetorheological elastomers, and a power controller for adjusting the current in the coil. The ferromagnetic connecting rod passes through and is fixed on the two sets of magnetorheological elastomers, and the coil is sleeved on the ferromagnetic connecting rod. When the coil is energized, a magnetic conductive path is formed between the magnetic cylinder, the ferromagnetic connecting rod, and the two sets of magnetorheological elastomers. By changing the magnitude of the current in the coil, the stiffness of the magnetorheological elastomers is changed. A variable bistable beam structure is installed inside a magnetic cylinder and is used to support the bottom of a ferromagnetic connecting rod. The variable bistable beam structure includes a bistable buckling beam for fixing the ferromagnetic connecting rod and electrically operated telescopic components fixed at both ends of the bistable buckling beam. The electrically operated telescopic components are fixedly installed inside the magnetic cylinder, and the output ends of the two electrically operated telescopic components at both ends of the bistable buckling beam synchronously extend and retract in the radial direction of the magnetic cylinder in a direction that approaches / moves away from each other, so that the middle part of the bistable buckling beam moves away from / approaches the bottom wall of the magnetic cylinder. The monitoring mechanism, housed within the magnetic cylinder, monitors the vibration of the ferromagnetic connecting rod. The electric telescopic component and power controller are electrically connected to the monitoring mechanism. Based on the vibration of the ferromagnetic connecting rod, the monitoring mechanism adjusts the current output from the power controller to the coil and the telescopic length of the electric telescopic component's output end. This, in turn, adjusts the stiffness of the adjustable vibration damping support and the bending degree of the bistable buckling beam. When the ferromagnetic connecting rod supports pipelines with different load rates, the combination of the adjustable vibration damping support and the variable bistable beam structure maintains quasi-zero dynamic stiffness at the equilibrium position and within a wide displacement amplitude range, thereby suppressing the vibration response of the ferromagnetic connecting rod and the pipeline.

[0006] Furthermore, the monitoring mechanism includes a sensor for monitoring the vibration of the ferromagnetic connecting rod and a processor for electrically controlling and adjusting the power controller and the electric telescopic component based on the monitoring data from the sensor. The sensor is fixedly mounted on the ferromagnetic connecting rod.

[0007] Furthermore, the magnetic cylinder contains multiple bistable buckling beams, which are staggered and overlap at the middle and are vertically connected to the bottom of the ferromagnetic connecting rod.

[0008] Furthermore, there are two magnetorheological elastomer groups in the same group, and the two magnetorheological elastomer groups in the same group are symmetrically arranged on both sides of the ferromagnetic connecting rod.

[0009] Furthermore, the magnetorheological elastomer assembly includes multiple magnetorheological elastomers and multiple magnetic blocks, which are stacked between the magnetic cylinder and the ferromagnetic connecting rod.

[0010] Furthermore, the magnetic guide cylinder is cylindrical, and both the magnetorheological elastomer and the magnetic guide block are fan-shaped. The magnetorheological elastomer group formed by combining multiple magnetorheological elastomers and multiple magnetic guide blocks is also fan-shaped, so that the outer wall of the magnetorheological elastomer group is tightly fitted with the inner wall of the magnetic guide cylinder, and the inner wall of the magnetorheological elastomer group is tightly fitted with the peripheral wall of the ferromagnetic connecting rod.

[0011] Furthermore, the frame is provided with two ferromagnetic connecting rods, which are symmetrically distributed at both ends of the frame. The adjustable vibration damping support, the variable bistable beam structure, and the monitoring mechanism are also provided with two of each. One end of the ferromagnetic connecting rod is perpendicular to the frame, and the other end is perpendicular to the magnetorheological elastomer assembly.

[0012] Furthermore, the frame includes two connecting plates that are perpendicularly connected to two ferromagnetic connecting rods respectively, and a snap-fit ​​plate fixed between the two connecting plates, with the pipe being stably installed on the snap-fit ​​plate.

[0013] In summary, this application includes the following beneficial technical effects: By combining the variable stiffness characteristics of the magnetorheological elastomer assembly with the negative stiffness characteristics of the variable bistable buckling beam, and with the help of the collaborative working mechanism of sensors, power controllers and electric expansion joints, the combination of adjustable vibration damping support and variable bistable beam structure can always maintain quasi-zero dynamic stiffness at the equilibrium position and within a wide displacement range when the ferromagnetic connecting rod supports pipelines with different load rates. This suppresses the vibration response of the ferromagnetic connecting rod and the pipeline, ensuring that the vibration damping support device has both high stability and strong vibration isolation effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0016] Figure 2 This is a schematic diagram of the structure of the magnetic cylinder, magnetorheological elastomer, coil, and bistable buckling beam in the embodiments of this application.

[0017] Figure 3 This is a front view of the ferromagnetic connecting rod, the bistable buckling beam, and the electric telescopic member in the embodiments of this application.

[0018] Figure 4 This is a top view of the ferromagnetic connecting rod, the bistable buckling beam, and the electric telescopic component in the embodiments of this application.

[0019] Figure 5 This is a top view of the magnetic cylinder, magnetorheological elastomer, magnetic block and ferromagnetic connecting rod in the embodiments of this application.

[0020] Figure 6 This is a schematic diagram showing how the stiffness of a magnetorheological elastic body increases with increasing magnetic field strength.

[0021] Figure 7 This is a schematic diagram showing how the negative stiffness characteristics of a variable bistable beam structure change with the degree of compression.

[0022] Figure 8 This is a schematic diagram showing that the vibration damping support device formed by the synergistic action of the magnetorheological elastomer group and the variable bistable beam structure under different working fluid load rates of the pipeline maintains quasi-zero dynamic stiffness within a wide displacement range at the equilibrium position.

[0023] Reference numerals: 1. Displacement sensor; 2. Magnetic cylinder; 3. Magnetorheological elastomer; 4. Magnetic block; 5. Coil; 6. Power controller; 7. Ferromagnetic connecting rod; 8. Connecting plate; 9. Clip plate; 10. Bistable buckling beam; 11. Electric telescopic component. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0025] This application discloses an intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams. (Refer to...) Figure 1 and Figure 2 The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams includes a support frame, an adjustable vibration damping support, a variable bistable beam structure, and a monitoring mechanism. The support frame includes a frame for fixing the pipeline and a ferromagnetic connecting rod 7 fixedly mounted on the frame. The adjustable vibration damping support includes a magnetic cylinder 2, two sets of magnetorheological elastomers fixedly mounted inside the magnetic cylinder 2, a coil 5 located between the two sets of magnetorheological elastomers, and a power controller 6 for adjusting the current in the coil 5. The magnetic cylinder 2 is made of ferromagnetic material, with one end of the ferromagnetic connecting rod 7 extending into the magnetic cylinder 2 away from the frame. The ferromagnetic connecting rod 7 passes through and is fixed to the two sets of magnetorheological elastomers, and the coil 5 is sleeved on the ferromagnetic connecting rod 7. The power controller 6 supplies current to the coil 5, forming a magnetic path between the magnetic cylinder 2, the ferromagnetic connecting rod 7, and the two sets of magnetorheological elastomers. By changing the current in the coil 5, the stiffness of the magnetorheological elastomers is altered.

[0026] Reference Figure 6 As the magnetic field strength of the magnetic conductive path formed between the magnetic cylinder 2, the ferromagnetic connecting rod 7 and the two sets of magnetorheological elastomers gradually increases, the elastic modulus of the magnetorheological elastomers increases significantly under the excitation of the magnetic field, and the stiffness of the entire adjustable vibration damping support also increases significantly, thereby quickly suppressing the vibration response of the ferromagnetic connecting rod 7 and the pipeline.

[0027] Although the variable stiffness characteristics of the magnetorheological elastic body can alter the natural frequency of the device, thus avoiding resonance, the adjustable vibration damping support still requires a relatively high initial stiffness to meet the load-bearing capacity requirements. This high stiffness inevitably leads to a high natural frequency. Linear vibration isolation theory indicates that resonance only occurs when the excitation frequency is close to the natural frequency, and when the excitation frequency is greater than... The device only has a vibration isolation effect when the frequency is twice the natural frequency. Therefore, in the low frequency range, the adjustable vibration damping support still has the defect of poor vibration damping effect.

[0028] To address the low-frequency vibration isolation problem while ensuring the bearing capacity of the support, in this embodiment, a variable bistable beam structure is used to support the bottom of the ferromagnetic connecting rod 7, referring to... Figure 2 , Figure 3 and Figure 4 The variable bistable beam structure includes a bistable buckling beam 10 for fixing and supporting the ferromagnetic connecting rod 7, and electrically operated telescopic members 11 fixed at both ends of the bistable buckling beam 10. The bistable buckling beam 10 is similar to the structure of a spring hairpin, and it can deform under force. The middle part of the bistable buckling beam 10 can protrude or be recessed towards the inner bottom wall of the magnetic cylinder 2. The bottom of the ferromagnetic connecting rod 7 is perpendicularly connected to the middle part of the bistable buckling beam 10. The electrically operated telescopic member 11 can be an electrically operated push rod or a piezoelectric stack. In this embodiment, the electrically operated telescopic member 11 is set as a piezoelectric stack. The electric telescopic component 11 is fixedly installed inside the magnetic cylinder 2, and the output ends of the two electric telescopic components 11 located at both ends of the bistable buckling beam 10 are synchronously extended and retracted along the radial direction of the magnetic cylinder 2 in the direction of approaching / moving away from each other, so that the middle part of the bistable buckling beam 10 moves away from / closer to the inner bottom wall of the magnetic cylinder 2, thereby changing the geometry of the bistable buckling beam 10 and thus adjusting the negative stiffness of the variable bistable beam structure.

[0029] Reference Figure 6 , Figure 7 and Figure 8When the ferromagnetic connecting rod 7 supports the pipeline, the pipeline's weight causes it to press down on the ferromagnetic connecting rod 7. The ferromagnetic connecting rod 7 drives the bistable buckling beam 10 to indent towards the inner bottom wall of the magnetic cylinder 2, causing the bistable buckling beam 10 to buckle and deform into the negative stiffness region. At this time, the magnitude of the current output by the coil 5 can be adjusted by the power controller 6, and the extension length of the output end of the electric telescopic component 11 can also be adjusted, thereby adjusting the stiffness of the adjustable vibration damping support and the bending degree of the bistable buckling beam 10. This ensures that when the ferromagnetic connecting rod 7 supports pipelines with different load rates, the vibration damping support device formed by the adjustable vibration damping support and the variable bistable beam structure has a low natural frequency and can always maintain quasi-zero dynamic stiffness at the equilibrium position and within a wide displacement amplitude range, thereby suppressing the vibration response of the ferromagnetic connecting rod 7 and the pipeline and achieving a strong vibration isolation effect.

[0030] To enable automatic adaptive adjustment of the stiffness of the adjustable vibration damping supports and the variable bistable beam structure based on pipeline vibration conditions, refer to Figure 1 and Figure 2 The monitoring mechanism is installed inside the magnetic cylinder 2. This mechanism monitors the vibration of the ferromagnetic connecting rod 7. Both the electric telescopic component 11 and the power controller 6 are electrically connected to the monitoring mechanism. This allows the monitoring mechanism to adjust the current output from the power controller 6 to the coil 5 and the telescopic length of the electric telescopic component 11 based on the vibration of the ferromagnetic connecting rod 7. This, in turn, adjusts the stiffness of the adjustable vibration damping support and the bending degree of the bistable buckling beam 10. Consequently, the vibration damping support device, formed by the adjustable vibration damping support and the variable bistable beam structure, maintains its stability under different working fluid load rates in the pipeline. Figure 8 The wide displacement amplitude quasi-zero dynamic stiffness region shown can thus achieve a strong vibration isolation effect.

[0031] For the setup of monitoring agencies, refer to Figure 1 and Figure 2The monitoring mechanism includes a sensor for monitoring the vibration of the ferromagnetic connecting rod 7 and a processor for electrically controlling and adjusting the power controller 6 and the electric telescopic component 11 based on the sensor's monitoring data. The sensor can be a displacement sensor 1, a velocity sensor, or an acceleration sensor; in this embodiment, the sensor is a displacement sensor 1. The sensor is fixedly installed on the ferromagnetic connecting rod 7. As the pipeline vibrates, the pipeline causes the ferromagnetic connecting rod 7 to vibrate, resulting in a corresponding displacement change within the magnetic cylinder 2. At this time, the processor can accurately identify the displacement of the ferromagnetic connecting rod 7 through the displacement sensor 1 and promptly trigger the power controller 6 and the electric telescopic component 11. This allows the power controller 6 to adaptively adjust the current output to the coil 5, and also adaptively adjusts the extension length of the output end of the electric telescopic component 11. Through the coordinated combination of the positive variable stiffness of the magnetorheological elastomer group and the negative variable stiffness of the variable bistable beam structure, the entire vibration damping support device maintains a wide displacement amplitude quasi-zero dynamic stiffness near the equilibrium position under different pipeline working fluid load rates. Furthermore, thanks to its wide-range quasi-zero dynamic stiffness characteristics, the resonance frequency of the entire vibration damping support device will be infinitely close to zero hertz, and thus the vibration of the pipeline system will always be maintained at an extremely low level under external load excitation.

[0032] To improve the stability of the variable bistable beam structure supported by the ferromagnetic connecting rod 7, refer to Figure 2 , Figure 3 and Figure 4 Multiple bistable buckling beams 10 are provided inside the magnetic cylinder 2. In this embodiment, two bistable buckling beams 10 are provided in the same magnetic cylinder 2. The two bistable buckling beams 10 are staggered, and their middle parts overlap and are vertically connected to the bottom of the ferromagnetic connecting rod 7. Correspondingly, the two bistable buckling beams 10 correspond to four electric telescopic members 11, and the four electric telescopic members 11 are evenly distributed along the circumference of the magnetic cylinder 2. The output ends of the four electric telescopic members 11 all point to the center of the magnetic cylinder 2, and the four electric telescopic members 11 are synchronously telescopic.

[0033] To improve the stability of the adjustable vibration damping bearing supporting the ferromagnetic connecting rod 7, refer to Figure 1 , Figure 2 and Figure 5 There are two magnetorheological elastomer groups in the same group, and the two magnetorheological elastomer groups in the same group are symmetrically arranged on both sides of the ferromagnetic connecting rod 7. This makes it so that when the coil 5 on the ferromagnetic connecting rod 7 is energized, magnetic conductive paths with the same field strength are formed on both sides of the ferromagnetic connecting rod 7. This makes the stiffness of the two magnetorheological elastomer groups in the same group the same. As a result, when the pipeline drives the ferromagnetic connecting rod 7 to vibrate, the ferromagnetic connecting rod 7 is not prone to deflection in the magnetic cylinder 2, thus avoiding the risk of the ferromagnetic connecting rod 7 being broken.

[0034] To further improve the permeability of the magnetorheological elastomer assembly, refer to Figure 1 , Figure 2 and Figure 5 The magnetorheological elastomer assembly comprises multiple magnetorheological elastomers 3 and multiple magnetic conductive blocks 4. The magnetorheological elastomers 3 and magnetic conductive blocks 4 are stacked between the magnetic conductive cylinder 2 and the ferromagnetic connecting rod 7. The magnetorheological elastomers 3 and magnetic conductive blocks 4, the magnetorheological elastomers 3 and the inner wall of the magnetic conductive cylinder 2, and the magnetorheological elastomers 3 and the ferromagnetic connecting rod 7 are all bonded together using adhesives such as epoxy resin. Arranging the magnetorheological elastomers 3 and magnetic conductive blocks 4 in a periodic stacking manner ensures excitation efficiency while significantly increasing the allowable deformation range of the magnetorheological elastomer assembly.

[0035] The magnetic cylinder 2 can be either square or cylindrical. In this embodiment, refer to... Figure 2 and Figure 5 The magnetic guide cylinder 2 is cylindrical. Correspondingly, the magnetorheological elastomer 3 and the magnetic guide block 4 are both fan-shaped, and the magnetorheological elastomer group formed by combining multiple magnetorheological elastomers 3 and multiple magnetic guide blocks 4 is also fan-shaped. Two fan-shaped magnetorheological elastomer groups in the same group are spaced apart and symmetrically arranged on both sides of the ferromagnetic connecting rod 7. This prevents the ferromagnetic connecting rod 7 from rotating during vibration and facilitates the fixed installation of the fan-shaped magnetorheological elastomer groups between the ferromagnetic connecting rod 7 and the magnetic guide cylinder 2. The ferromagnetic connecting rod 7 is round. In this case, the outer wall of the fan-shaped magnetorheological elastomer group is tightly fitted with the inner wall of the magnetic guide cylinder 2, and the inner wall of the magnetorheological elastomer group is tightly fitted with the peripheral wall of the ferromagnetic connecting rod 7. This allows the adjustable vibration damping support formed by the cylindrical magnetic guide cylinder 2 and the fan-shaped magnetorheological elastomer group to stably support the ferromagnetic connecting rod 7, preventing the ferromagnetic connecting rod 7 from deflecting during vibration.

[0036] Considering the long length and large diameter of the pipeline, in order to ensure that the ferromagnetic connecting rod 7 can stably support the pipeline, refer to Figure 1The frame includes two connecting plates 8 and a snap-fit ​​plate 9 fixed between the two connecting plates 8. The snap-fit ​​plate 9 is arc-shaped, allowing the pipe to be stably placed within it. To prevent the pipe from detaching from the snap-fit ​​plate 9, two frames are provided, which snap together on the upper and lower sides of the pipe to stably clamp it. Two ferromagnetic connecting rods 7, adjustable vibration damping supports, a variable bistable beam structure, and a monitoring mechanism are also provided. The two ferromagnetic connecting rods 7 are vertically installed on the two connecting plates 8 on both sides of the frame. One end of the ferromagnetic connecting rod 7 is perpendicular to the magnetorheological elastomer assembly, and the other end passes vertically through the connecting plates 8 of the two frames. The ends of the ferromagnetic connecting rods 7 are threaded, and two nuts are threaded onto the ferromagnetic connecting rods 7. The two nuts can stably press the connecting plates 8 of the two frames onto the ferromagnetic connecting rods 7, allowing the two ferromagnetic connecting rods 7 to stably support the frame and the pipe.

[0037] The implementation principle of the intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams in this application embodiment is as follows: The pipeline is erected above two magnetic cylinders 2 via two ferromagnetic connecting rods 7. The bottom ends of the ferromagnetic connecting rods 7 vertically penetrate two sets of magnetorheological elastomers and are fixedly installed at the center of the bistable buckling beam 10. The sidewalls of the ferromagnetic connecting rods 7 are fixedly connected to the magnetorheological elastomer sets. Due to the pipeline's own weight, it presses down on the ferromagnetic connecting rods 7, causing the bistable buckling beam 10 to indent towards the inner bottom wall of the magnetic cylinder 2, resulting in buckling deformation of the bistable buckling beam 10 and its entry into the negative stiffness region. As the load rate of the working medium inside the pipeline changes, the pipeline generates different self-weights, causing the ferromagnetic connecting rod 7 to displace to varying degrees. The processor can accurately identify the displacement of the ferromagnetic connecting rod 7 through the displacement sensor 1 and promptly trigger the power controller 6 and the electric telescopic component 11. This allows the power controller 6 to adaptively adjust the current output to the coil 5, and also allows the telescopic length of the output end of the electric telescopic component 11 to be adaptively adjusted. At this time, through the coordinated combination of the positive variable stiffness of the magnetorheological elastomer group and the negative variable stiffness of the variable bistable beam structure, the entire vibration damping support device maintains a wide displacement amplitude quasi-zero dynamic stiffness near the equilibrium position under different pipeline working medium load rates. Furthermore, thanks to its wide amplitude quasi-zero dynamic stiffness characteristics, the resonant frequency of the entire vibration damping support device will be infinitely close to zero Hertz, thus maintaining the vibration of the pipeline system at an extremely low level under external load excitation.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A smart vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams, characterized in that, include A support frame for installing pipes, the support frame including a frame for fixing the pipes and a ferromagnetic connecting rod fixedly installed on the frame; An adjustable vibration damping support is used to provide vibration damping support for a ferromagnetic connecting rod. The adjustable vibration damping support includes a magnetic cylinder, two sets of magnetorheological elastomers fixedly installed inside the magnetic cylinder, a coil located between the two sets of magnetorheological elastomers, and a power controller for adjusting the current in the coil. The ferromagnetic connecting rod passes through and is fixed on the two sets of magnetorheological elastomers, and the coil is sleeved on the ferromagnetic connecting rod. When the coil is energized, a magnetic conductive path is formed between the magnetic cylinder, the ferromagnetic connecting rod, and the two sets of magnetorheological elastomers. By changing the magnitude of the current in the coil, the stiffness of the magnetorheological elastomers is changed. A variable bistable beam structure is installed inside a magnetic cylinder and is used to support the bottom of a ferromagnetic connecting rod. The variable bistable beam structure includes a bistable buckling beam for fixing the ferromagnetic connecting rod and electrically operated telescopic components fixed at both ends of the bistable buckling beam. The electrically operated telescopic components are fixedly installed inside the magnetic cylinder, and the output ends of the two electrically operated telescopic components at both ends of the bistable buckling beam synchronously extend and retract in the radial direction of the magnetic cylinder in a direction that approaches / moves away from each other, so that the middle part of the bistable buckling beam moves away from / approaches the bottom wall of the magnetic cylinder. The monitoring mechanism, housed within the magnetic cylinder, monitors the vibration of the ferromagnetic connecting rod. The electric telescopic component and power controller are electrically connected to the monitoring mechanism. Based on the vibration of the ferromagnetic connecting rod, the monitoring mechanism adjusts the current output from the power controller to the coil and the telescopic length of the electric telescopic component's output end. This, in turn, adjusts the stiffness of the adjustable vibration damping support and the bending degree of the bistable buckling beam. When the ferromagnetic connecting rod supports pipelines with different load rates, the combination of the adjustable vibration damping support and the variable bistable beam structure maintains quasi-zero dynamic stiffness at the equilibrium position and within a wide displacement amplitude range, thereby suppressing the vibration response of the ferromagnetic connecting rod and the pipeline.

2. The intelligent vibration reduction support device for pipelines based on magnetorheological elastomers and bistable beams according to claim 1, characterized in that, The monitoring mechanism includes a sensor for monitoring the vibration of the ferromagnetic connecting rod and a processor for electrically controlling and adjusting the power controller and the electric telescopic component based on the monitoring data from the sensor. The sensor is fixedly installed on the ferromagnetic connecting rod.

3. The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams according to claim 1, characterized in that, The magnetic cylinder contains multiple bistable buckling beams, which are staggered and overlap at the middle and are perpendicularly connected to the bottom of the ferromagnetic connecting rod.

4. The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams according to claim 1, characterized in that, There are two magnetorheological elastomer groups in the same group, and the two magnetorheological elastomer groups in the same group are symmetrically arranged on both sides of the ferromagnetic connecting rod.

5. The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams according to claim 4, characterized in that, The magnetorheological elastomer assembly includes multiple magnetorheological elastomers and multiple magnetic blocks, which are stacked between the magnetic cylinder and the ferromagnetic connecting rod.

6. The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams according to claim 5, characterized in that, The magnetic guide cylinder is cylindrical, and both the magnetorheological elastomer and the magnetic guide block are fan-shaped. The magnetorheological elastomer group formed by combining multiple magnetorheological elastomers and multiple magnetic guide blocks is also fan-shaped, so that the outer wall of the magnetorheological elastomer group is tightly attached to the inner wall of the magnetic guide cylinder, and the inner wall of the magnetorheological elastomer group is tightly attached to the peripheral wall of the ferromagnetic connecting rod.

7. The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams according to claim 1, characterized in that, Two ferromagnetic connecting rods are provided on the frame, and the two ferromagnetic connecting rods are symmetrically distributed at both ends of the frame. Two adjustable vibration damping supports, variable bistable beam structures and monitoring mechanisms are also provided accordingly. One end of the ferromagnetic connecting rod is set perpendicular to the frame and the other end is set perpendicular to the magnetorheological elastomer assembly.

8. The intelligent vibration damping support device for pipelines based on magnetorheological elastomers and bistable beams according to claim 7, characterized in that, The frame includes two connecting plates that are perpendicularly connected to two ferromagnetic connecting rods, and a snap-fit ​​plate fixed between the two connecting plates. The pipe is stably installed on the snap-fit ​​plate.

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