Local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping

Abstract

The invention relates to a local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping. The vibration isolation platform comprises a bearing platform, a local resonance type three-dimensional vibration isolation support and a bionic synergistic damping structure. The local resonance type three-dimensional vibration isolation support comprises a multi-stage disc spring support and a renewable rubber support, vertical and horizontal vibration isolation is achieved, and enough vertical bearing force is provided. A local resonance system is arranged to generate a band gap, and transmission of elastic waves in the vibration isolation platform is further blocked; the bionic synergistic damping structure comprises a bionic leg bone structure, a spring and an overflow force limiting type damper, deformation of the overflow force limiting type damper and the spring is amplified in a non-linear mode through the bionic synergistic damping structure, and energy consumption synergistic effect and rigidity adjustment are achieved. Compared with the prior art, transmission of vibration in the platform can be effectively blocked, and three-dimensional vibration isolation is achieved.

Description

Technical Field

[0001] This invention relates to the field of vibration control technology, and in particular to a local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping. Background Technology

[0002] In vibration control technology, vibration isolation technology achieves the purpose of isolating vibration transmission by setting a flexible vibration isolation layer between the vibration source and the vibrating object. It is currently widely used in building structures, bridges, industrial equipment, and other fields, and has good effects on isolating earthquakes, human-induced vibrations, and environmental vibrations. The vibration isolation layer typically includes vibration isolation devices and energy dissipation devices. Existing vibration isolation devices include laminated rubber bearings, lead-core rubber bearings, and friction pendulum bearings, while existing energy dissipation devices include viscous dampers and metal dampers.

[0003] However, most existing vibration isolation devices can only achieve horizontal or vertical vibration isolation, and the research and application of three-dimensional vibration isolation devices are relatively limited. For rubber-based vibration isolation bearings, existing rubber recycling technology makes it difficult to achieve circular processing, which easily leads to resource waste and environmental problems. For friction pendulum bearings, their practical application is limited due to their lack of tensile strength and weak long-term service capacity. In addition, existing earthquake damage data shows that although vibration isolation layers can reduce the vibration response of the superstructure or equipment, there is still a problem of excessive displacement within the vibration isolation layer, which may lead to damage to pipelines or other non-structural components inside the isolation layer; and the connection nodes of energy dissipation devices are prone to damage due to excessive device output, such as the cracking of concrete supports.

[0004] CN113668711A discloses a three-dimensional vibration isolation / seismic bearing with horizontal bidirectional and vertical deformation decoupling. By adding a deformation decoupling device to the vertical vibration isolation bearing, three-dimensional decoupling of horizontal and vertical deformation is achieved, solving the problem of poor seismic isolation and vibration isolation effects of traditional bearings under horizontal and vertical deformation coupling, and improving the seismic resistance and safety of the structure. However, this vibration isolation / seismic bearing can only extend the natural period of the controlled structure / equipment through its low stiffness, thereby reducing the dynamic response of the structure / equipment; it does not have energy dissipation capacity and cannot achieve displacement control of the isolation layer; it does not possess the special bandgap properties of metamaterials and cannot completely block the transmission of elastic waves (such as seismic waves, equipment vibrations, etc.) within the isolation / seismic layer.

[0005] Therefore, there is still room for improvement in the energy dissipation efficiency of existing seismic isolation / vibration-damping layers, and the force limiting problem of these devices urgently needs to be addressed. Furthermore, there is still room for improvement in the isolation effect of seismic isolation / vibration-damping bearings on elastic waves. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art by providing a local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping, so as to improve the energy dissipation efficiency of energy dissipation devices in the vibration isolation / vibration layer and the isolation effect on elastic waves.

[0007] The objective of this invention can be achieved through the following technical solutions: This invention provides a localized resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping, disposed between the vibration source plane and the vibrating object. The vibration isolation platform includes: A load-bearing platform used to support objects subjected to vibration; A local resonant three-dimensional vibration isolation support is installed between the vibration source plane and the bearing platform; And, a biomimetic enhanced damping structure is provided between the vibration source plane and the bearing platform; The localized resonant three-dimensional vibration isolation support includes a multi-stage disc spring support and a regenerable rubber support; wherein, the multi-stage disc spring support is composed of several localized resonant disc spring systems, used to achieve vertical vibration isolation; the regenerable rubber support is disposed between the multi-stage disc spring support and the vibration source plane, used to achieve horizontal vibration isolation. The biomimetic enhanced damping structure includes a biomimetic leg structure disposed between the vibration source plane and the bearing platform. The biomimetic leg structure is formed by a number of first hinge points and a number of rigid rods, and at least one set of two first hinge points not connected by rigid rods are simultaneously connected to an overflow force-limiting damper and a spring. The biomimetic leg structure is used to nonlinearly amplify the vertical and horizontal vibrations of the bearing platform, thereby inducing nonlinear enhanced deformation at both ends of the overflow force-limiting damper and the spring.

[0008] Furthermore, the multi-stage disc spring support includes N×M local resonant disc spring systems; where N is the number of columns arranged circumferentially along the upper surface of the recyclable rubber support, N≥2; and M is the number of local resonant disc spring systems stacked sequentially in each column along the vertical direction, M≥2.

[0009] Furthermore, the top-level local resonant disc spring system is connected to the support platform via an upper connecting plate, and the bottom-level local resonant disc spring system is connected to the recyclable rubber support via a middle connecting plate.

[0010] Furthermore, the local resonant disc spring system includes guide limiting posts and disc spring assemblies sleeved on the guide limiting posts, and a force transmission plate is provided between adjacent guide limiting posts in the vertical direction.

[0011] Furthermore, a force transmission column is provided between the force transmission plate and the disc spring assembly to transmit vertical force to the disc spring assembly.

[0012] Furthermore, the guide limiting post is provided with a first local resonant oscillator. One end of the first local resonant oscillator is connected to the bottom of the guide limiting post through a first local resonant spring, and the other end is connected to the force transmission plate or the middle connecting plate through the first local resonant spring.

[0013] Furthermore, the contact surface between the guide limiting post and the first local resonant oscillator is provided with a three-level friction surface. (Definition) d It is the vertical distance between a point on the contact surface and the contact point between the first local resonant oscillator and the guide limit post when at rest.

[0014] Furthermore, when the vertical distance d Less than d At time 1, it is considered a first-order friction surface, with a friction coefficient set at 0.015-0.025. Among these, d 1 is 1 / 7 to 1 / 5 of the inner height of the guide limit post, preferably 1 / 6 of the inner height of the guide limit post.

[0015] Furthermore, when the vertical distance d Increase to greater than d 1 and less than d At time 2, the friction surface becomes a secondary friction surface, and the coefficient of friction increases to 0.04-0.06. Among these, d 2 represents 1 / 4 to 1 / 2 of the inner height of the guide limit post. ， Preferably, it is 1 / 3 of the height inside the guide limit post.

[0016] Furthermore, when the vertical distance d Increase to greater than d At time 2, the friction surface becomes a third-order friction surface, and the coefficient of friction increases to 0.08-0.12.

[0017] Furthermore, the recyclable rubber support is connected to the multi-stage disc spring support via the middle connecting plate, and to the vibration source plane via the lower connecting plate.

[0018] Furthermore, the renewable rubber support includes a cylindrical support body, the inner wall of which is provided with several horizontal annular rubber layers at equal intervals from top to bottom, and annular steel plates are provided alternately in the gaps formed by adjacent horizontal annular rubber layers.

[0019] Furthermore, the horizontal annular rubber layer encloses a cylindrical hollow region, within which a friction plate, a second local resonant oscillator, a second local resonant spring, a telescopic hinge rod, and a second hinge point are provided.

[0020] Furthermore, the friction plate is connected to the annular steel plate and is arranged horizontally, and a second local resonant oscillator is provided between adjacent friction plates, between the friction plate and the middle connecting plate, and between the friction plate and the lower connecting plate.

[0021] Furthermore, the second local resonant oscillator is connected to a corresponding telescopic hinge rod via at least two second local resonant springs to form a horizontal local resonant system.

[0022] Furthermore, the upper end of the telescopic hinge rod is connected to the friction plate or the middle connecting plate via a second hinge point, and the lower end is connected to the friction plate or the lower connecting plate via a second hinge point.

[0023] Furthermore, the contact surface between the friction plate and the second local resonant oscillator is a third-order friction surface. (Definition) r Let be the radial distance between a point on the contact surface and the contact point between the second local resonant oscillator and the friction plate when at rest.

[0024] Furthermore, when the radial distance r Less than r At time 1, it is considered a first-order friction surface, with a friction coefficient set at 0.015-0.025. Among these, r 1 is 1 / 4 to 1 / 2 of the radius of the friction plate, preferably 1 / 3 of the radius of the friction plate.

[0025] Furthermore, when the radial distance r Increase to greater than r 1 and less than r At time 2, the friction surface becomes a secondary friction surface, and the coefficient of friction increases to 0.04-0.06. Among these, r 2 is 3 / 5 to 4 / 5 of the radius of the friction plate, preferably 2 / 3 of the radius of the friction plate.

[0026] Furthermore, when the radial distance r Increase to greater than r At time 2, the friction surface becomes a third-order friction surface, and the coefficient of friction increases to 0.08-0.12.

[0027] Furthermore, the main body of the bionic leg bone structure consists of two quadrilateral structures formed by eight rigid rods and seven first hinge points. The topmost first hinge point of the bionic leg bone structure is connected to the bearing platform, and the bottommost first hinge point is connected to the vibration source plane.

[0028] Furthermore, in each quadrilateral structure, an overflow-limiting damper and a spring are simultaneously connected between the two first hinge points that are horizontal or nearly horizontal and not connected by a rigid rod.

[0029] Furthermore, the overflow force-limiting damper includes an outer cylinder, an erbium ring, a piston rod, a piston, and an even number of symmetrically arranged overflow valves.

[0030] Furthermore, the outer cylinder is provided with a piston moving chamber and a cavity, both of which are filled with silicone oil.

[0031] Furthermore, one end of the piston rod passes through the piston moving chamber and extends into the cavity, while the other end extends out from the outer cylinder.

[0032] Furthermore, the piston mounted on the piston rod further divides the piston moving chamber into a first chamber and a second chamber.

[0033] Furthermore, both the end of the piston rod extending out of the outer cylinder and the opposite end of the outer cylinder are connected to erbium rings, and the overflow force-limiting damper is connected to the first hinge point in the bionic leg bone structure through the erbium rings at both ends.

[0034] Furthermore, the overflow valve includes a pressure relief channel, a valve core, and a preload spring located inside the outer cylinder, with the valve core connected to the outer cylinder via the preload spring.

[0035] Furthermore, the two ends of the pressure relief channel are connected to the first chamber and the second chamber respectively, with one end being a silicone oil inlet and the other end being a pressure relief outlet.

[0036] Furthermore, the preload of the preload spring is the damping force limit value of the overflow limiting damper.

[0037] Furthermore, when the output force of the overflow limiting damper does not exceed the limit, the valve core of the overflow valve blocks the pressure relief outlet, and the overflow valve closes.

[0038] Furthermore, when the output force of the overflow force-limiting damper exceeds the limit, the pressure relief outlet of the overflow valve opens, the first and second chambers of the overflow force-limiting damper are connected through the pressure relief channel, the overflow valve is activated, the output force of the overflow force-limiting damper decreases until it is less than or equal to the damping force limit, at which point the overflow valve closes.

[0039] Compared with the prior art, the present invention has the following technical advantages: (1) This invention uses a combination of disc spring supports and recyclable rubber supports to achieve three-dimensional vibration isolation of the structure / equipment. By introducing a local resonance system to form a band gap, the transmission of elastic waves is blocked. The biomimetic damping enhancement structure can nonlinearly amplify the horizontal and vertical deformation of the vibration isolation layer. Based on the amplified deformation, the energy dissipation device is driven to work, realizing efficient dissipation of vibration energy. Based on the amplified deformation, the spring is driven to work, realizing positive stiffness, quasi-zero stiffness and negative stiffness behavior within a certain deformation range, so as to flexibly adjust the horizontal and vertical stiffness of the platform. Through the modular structural design, this invention can effectively block the transmission of vibration within the platform when the equipment / structure or the ground / floor vibrates, realizing three-dimensional vibration isolation, effectively improving energy dissipation efficiency and the isolation effect on elastic waves.

[0040] (2) The present invention achieves nonlinear damping behavior controlled by vibration deformation by setting multiple levels of friction surfaces inside the guide limit post and on the surface of the friction plate.

[0041] (3) Since energy-consuming devices such as metal dampers and viscoelastic dampers reduce the efficiency of the seismic isolation platform due to the additional stiffness they bring, this invention uses a viscous damper that does not bring additional stiffness as an energy-consuming device, and further amplifies the energy-consuming efficiency of the viscous damper by using a biomimetic leg bone structure to solve the problem of excessive displacement of the seismic isolation platform.

[0042] (4) The present invention innovatively adopts an overflow valve to improve the device structure of the existing intermittent viscous damper. It uses the balance between the pressure in the damper cavity and the reaction force of the preload spring to control the opening and closing of the pressure relief channel, thereby achieving the purpose of limiting the maximum output of the device and preventing the connection node from being damaged due to excessive output of the device. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the local resonance type three-dimensional vibration isolation platform of the present invention.

[0044] Figure 2 This is a top-section view of the local resonance type three-dimensional vibration isolation support in the local resonance type three-dimensional vibration isolation platform of the present invention.

[0045] Figure 3 This is a schematic diagram of the three-level friction surface in Embodiment 3 of the present invention.

[0046] Figure 4 This is a schematic diagram of the overflow force-limiting damper in Embodiment 5 of the present invention.

[0047] Figure 5 This is a schematic diagram of the overflow valve in Embodiment 5 of the present invention.

[0048] Explanation of markings in the diagram: 1-Vibration source plane; 2-Bearing platform; 3-Multi-stage disc spring support, 31-Upper connecting plate, 32-Middle connecting plate, 33-Guide limiting post, 34-Disc spring assembly, 35-Force transmission plate, 36-Force transmission post, 37-First local resonant oscillator, 38-First local resonant spring; 4-Recyclable rubber support, 41-Lower connecting plate, 42-Support body, 421-Horizontal annular rubber layer, 43-Annular steel plate, 44-Friction plate, 45-Second local resonant oscillator, 46-Second local resonant spring, 47-Extendable hinge rod, 48-Second hinge point; 5- Bionic leg bone structure, 51- First hinge point, 52- Rigid rod; 6-Overflow force-limiting damper, 61-Outer cylinder, 611-Piston moving chamber, 611a-First chamber, 611b-Second chamber, 612-Cavity, 62-Erbium ring, 63-Piston rod, 64-Piston, 65-Overflow valve, 651-Pressure relief channel, 652-Valve core, 653-Preload spring, 654-Silicone oil inlet, 655-Pressure relief outlet; 7-Spring. Detailed Implementation

[0049] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0050] In this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] Example 1: This embodiment provides a localized resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping. The platform is positioned between the vibration source plane 1 and the vibrating object, effectively blocking the transmission of vibration within the three-dimensional isolation platform and achieving three-dimensional vibration isolation.

[0053] like Figure 1As shown, the vibration isolation platform in this embodiment specifically includes a load-bearing platform 2, a local resonant three-dimensional vibration isolation support, and a biomimetic enhanced damping structure. The local resonant three-dimensional vibration isolation support and the biomimetic enhanced damping structure are independently disposed between the vibration source plane 1 and the load-bearing platform 2. The vibration source plane 1 includes, but is not limited to, the ground or a floor; the load-bearing platform 2 is used to support vibrating objects such as buildings and equipment.

[0054] This embodiment of the localized resonance type three-dimensional vibration isolation support includes a multi-stage disc spring support 3 and a recyclable rubber support 4. The multi-stage disc spring support 3 consists of several localized resonance disc spring systems. While achieving vertical vibration isolation, the multi-stage disc spring support 3 generates a band gap through the localized resonance system, blocking the transmission of vertical vibration waves. The recyclable rubber support 4 of this embodiment is located between the multi-stage disc spring support 3 and the vibration source plane 1. While achieving horizontal vibration isolation, it also generates a band gap through the localized resonance system, blocking the transmission of horizontal vibration waves.

[0055] The biomimetic enhanced damping structure of this embodiment includes a biomimetic leg bone structure 5, an overflow force-limiting damper 6, and a spring 7. The biomimetic leg bone structure 5 is located between the vibration source plane 1 and the bearing platform 2, and is specifically formed by a number of first hinge points 51 and a number of rigid rods 52. At least one set of two first hinge points 51 in the biomimetic leg bone structure 5 that are not connected by rigid rods 52 are simultaneously connected to an overflow force-limiting damper 6 and a spring 7. As can be seen by those skilled in the art, the number of overflow force-limiting dampers 6 and springs 7 can be increased between two first hinge points 51 that meet the conditions according to the actual situation.

[0056] In this embodiment, the biomimetic leg bone structure 5 is used to nonlinearly amplify the vertical and horizontal vibrations of the load-bearing platform 2, thereby inducing nonlinear enhanced deformation at both ends of the overflow force-limiting damper 6 and the spring 7. Based on the amplified nonlinear deformation, the spring 7 can generate positive stiffness, quasi-zero stiffness, and negative stiffness within a certain deformation range, flexibly adjusting the overall stiffness of the platform; based on the amplified nonlinear deformation, the overflow force-limiting damper 6 is driven to work, thereby achieving energy efficiency improvement.

[0057] When the equipment / structure on the bearing platform 2 vibrates, or when the vibration source plane 1 (such as the ground / floor) vibrates, the transmission of vibration within the platform can be effectively blocked, achieving three-dimensional vibration isolation. Specifically, the combination of multi-stage disc spring supports 3 and recyclable rubber supports 4 achieves vertical and horizontal vibration isolation and provides sufficient vertical bearing capacity; a local resonance system is set up to generate a band gap, further blocking the transmission of elastic waves within the vibration isolation platform; the deformation of the overflow force-limiting damper 6, which is nonlinearly amplified by the biomimetic efficiency-enhancing damping structure, is used to enhance energy consumption efficiency and improve the energy consumption capacity of the vibration isolation platform; and the deformation of the spring 7, which is nonlinearly amplified by the biomimetic efficiency-enhancing damping structure, is used to achieve positive stiffness, quasi-zero stiffness, and negative stiffness within a certain range, enabling flexible adjustment of the overall stiffness of the platform.

[0058] Example 2: This embodiment provides a localized resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping. The platform specifically includes a load-bearing platform 2, a localized resonant three-dimensional vibration isolation support, and a biomimetic enhanced damping structure. The localized resonant three-dimensional vibration isolation support and the biomimetic enhanced damping structure are independently disposed between the vibration source plane 1 and the load-bearing platform 2. The vibration source plane 1 includes, but is not limited to, the ground or a floor; the load-bearing platform 2 is used to support vibrating objects such as buildings and equipment.

[0059] Compared to Embodiment 1, the multi-stage disc spring support 3 in this embodiment includes N×M local resonant disc spring systems, where N is the number of columns arranged circumferentially along the upper surface of the recyclable rubber support, N≥2; and M is the number of local resonant disc spring systems stacked vertically in each column, M≥2. Through the array-like arrangement of the local resonant disc spring systems, multiple local resonant disc spring systems can generate a band gap, blocking the transmission of vibration waves within the band gap in the local resonant multi-stage disc spring support and ensuring the stability of the entire multi-stage disc spring support 3. The top-level local resonant disc spring system is connected to the bearing platform 2 via an upper connecting plate 31, and the bottom-level local resonant disc spring system is connected to the recyclable rubber support 4 via a middle connecting plate 32.

[0060] The local resonant disc spring system of this embodiment includes a guide limiting post 33 and a disc spring assembly 34 sleeved on the guide limiting post 33. A horizontal force transmission plate 35 is provided between adjacent guide limiting posts 33 in the vertical direction. A force transmission post 36 is provided between the force transmission plate 35 and the disc spring assembly 34 for transmitting vertical force to the disc spring assembly 34.

[0061] In this embodiment, a first local resonant oscillator 37 is provided inside the guide limiting post 33. One end of the first local resonant oscillator 37 is connected to the bottom of the guide limiting post 33 through a first local resonant spring 38, and the other end of the first local resonant oscillator 37 is connected to the force transmission plate 35 or the middle connecting plate 32 through the first local resonant spring 38.

[0062] In this embodiment, the renewable rubber support 4 is connected to the multi-stage disc spring support 3 via the middle connecting plate 32, and is connected to the vibration source plane 1 via the lower connecting plate 41.

[0063] The recyclable rubber support 4 in this embodiment includes a cylindrical support body 42, whose inner wall is provided with a plurality of horizontal annular rubber layers 421 at equal intervals from top to bottom, forming a comb-like or tooth-like structure in its overall cross-section. Annular steel plates 43 are alternately arranged in the gaps formed by adjacent horizontal annular rubber layers 421, for example, annular steel plates 43 are arranged in the 2nd, 4th, and 6th gaps. The annular steel plates 43 and the horizontal annular rubber layers 421 have the same dimensions.

[0064] like Figure 2As shown, in this embodiment, a horizontal annular rubber layer 421 encloses a cylindrical hollow region. Within this hollow region are a friction plate 44, a second local resonant oscillator 45, a second local resonant spring 46, a retractable hinge rod 47, and a second hinge point 48. The friction plate 44 is connected to the annular steel plate 43 and is horizontally arranged, thus forming a cylindrical space between adjacent friction plates 44. Second local resonant oscillators 45 are provided between adjacent friction plates 44, between friction plates 44 and the middle connecting plate 32, and between friction plates 44 and the lower connecting plate 41. Each second local resonant oscillator 45 is connected to a corresponding retractable hinge rod 47 via at least two second local resonant springs 46, forming a horizontal local resonant system. The number of second local resonant springs 46 and retractable hinge rods 47 is equal, for example, three or four each. The upper end of the telescopic hinge rod 47 is connected to the friction plate 44 or the middle connecting plate 32 through the second hinge point 48, and the lower end of the telescopic hinge rod 47 is connected to the friction plate 44 or the lower connecting plate 41 through the second hinge point 48.

[0065] Example 3: This embodiment provides a localized resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping. The vibration isolation platform specifically includes a load-bearing platform 2, a localized resonant three-dimensional vibration isolation support, and a biomimetic enhanced damping structure. The localized resonant three-dimensional vibration isolation support and the biomimetic enhanced damping structure are independently disposed between the vibration source plane 1 and the load-bearing platform 2.

[0066] Compared to Embodiment 2, the contact surface between the guide limiting post 33 and the first local resonant oscillator 37 in this embodiment is provided with a three-level friction surface. First, define... d It is the vertical distance between a point on the contact surface and the contact point between the first local resonant oscillator 37 and the guide limiting post 33 when at rest.

[0067] like Figure 3 As shown, when the vertical distance d Less than d When the friction coefficient is 1, it is considered a first-order friction surface, and the coefficient of friction is set to 0.015-0.025, such as 0.02. d 1 is 1 / 7 to 1 / 5 of the height inside the guide limit post, preferably 1 / 6.

[0068] When vertical distance d Increase to greater than d 1 and less than d At time 2, the friction surface becomes a secondary friction surface, and the coefficient of friction increases to 0.04-0.06, such as 0.05. d 2 is 1 / 4 to 1 / 2 of the height inside the guide limit post, preferably 1 / 3.

[0069] When vertical distance d Increase to greater than dAt time 2, the friction surface is a third-order friction surface, and the coefficient of friction increases to 0.08-0.12, such as 0.1.

[0070] Furthermore, compared to Embodiment 2, the side of the friction plate 44 that contacts the second local resonant oscillator 45 in this embodiment is also a third-level friction surface. First, define... r The radial distance between a point on the contact surface and the contact point between the second local resonant oscillator 45 and the friction plate 44 when at rest.

[0071] When radial distance r Less than r When the friction coefficient is 1, it is considered a first-order friction surface, and the coefficient of friction is set to 0.015-0.025, such as 0.02. r 1 is 1 / 4 to 1 / 2 of the radius of the friction plate 44, preferably 1 / 3.

[0072] When radial distance r Increase to greater than r 1 and less than r At time 2, the friction surface becomes a secondary friction surface, and the coefficient of friction increases to 0.04-0.06, such as 0.05. r 2 is 3 / 5 to 4 / 5 of the radius of the friction plate 44, preferably 2 / 3.

[0073] When radial distance r Increase to greater than r At time 2, the friction surface is a third-order friction surface, and the coefficient of friction increases to 0.08-0.12, such as 0.1.

[0074] This embodiment achieves nonlinear damping behavior controlled by vibration deformation by setting multiple levels of friction surfaces inside the guide limit post 33 and on the surface of the friction plate 44.

[0075] Example 4: This embodiment provides a localized resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping. The platform specifically includes a load-bearing platform 2, a localized resonant three-dimensional vibration isolation support, and a biomimetic enhanced damping structure. The localized resonant three-dimensional vibration isolation support and the biomimetic enhanced damping structure are independently disposed between the vibration source plane 1 and the load-bearing platform 2. The vibration source plane 1 includes, but is not limited to, the ground or a floor; the load-bearing platform 2 is used to support vibrating objects such as buildings and equipment.

[0076] Compared to Embodiment 1, the main body of the bionic leg bone structure 5 in this embodiment is two quadrilateral structures formed by eight rigid rods 52 and seven first hinge points 51, with the two quadrilateral structures sharing one of the first hinge points 51. The topmost first hinge point 51 of the bionic leg bone structure 5 is connected to the support platform 2, and the bottommost first hinge point 51 is connected to the vibration source plane 1.

[0077] In this embodiment, an overflow force-limiting damper 6 and a spring 7 are connected between two first hinge points 51 that are horizontal or nearly horizontal and not connected by a rigid rod 52 in the two quadrilateral structures. An overflow force-limiting damper 6 and a spring 7 can be selectively added between the other two first hinge points 51 that are not connected by a rigid rod 52, depending on the actual situation.

[0078] Example 5: This embodiment provides a localized resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping. The platform specifically includes a load-bearing platform 2, a localized resonant three-dimensional vibration isolation support, and a biomimetic enhanced damping structure. The localized resonant three-dimensional vibration isolation support and the biomimetic enhanced damping structure are independently disposed between the vibration source plane 1 and the load-bearing platform 2. The vibration source plane 1 includes, but is not limited to, the ground or a floor; the load-bearing platform 2 is used to support vibrating objects such as buildings and equipment.

[0079] Compared with Embodiment 1, the overflow force-limiting damper 6 in this embodiment includes an outer cylinder 61, an erbium ring 62, a piston rod 63, a piston 64, and an overflow valve 65.

[0080] In this embodiment, the outer cylinder 61 is provided with a piston moving chamber 611 and a cavity 612, both of which are filled with silicone oil. One end of the piston rod 63 passes through the piston moving chamber 611 and extends into the cavity 612, while the other end extends out of the outer cylinder 61. A piston 64 mounted on the piston rod 63 further divides the piston moving chamber 611 into a first chamber 611a and a second chamber 611b.

[0081] In this embodiment, both the end of the piston rod 63 extending out of the outer cylinder 61 and the opposite end of the outer cylinder 61 are connected to erbium rings 62. The overflow force-limiting damper 6 is connected to the first hinge point 51 in the bionic leg bone structure 5 through the erbium rings 62 at both ends.

[0082] In this embodiment, the overflow valves 65 are arranged in an even-numbered symmetrical pattern to improve stress stability. Specifically, the overflow valve 65 includes a pressure relief channel 651, a valve core 652, and a preload spring 653 located inside the outer cylinder 61. The two ends of the pressure relief channel 651 are connected to the first chamber 611a and the second chamber 611b, respectively, with one end being a silicone oil inlet 654 and the other end being a pressure relief outlet 655.

[0083] In this embodiment, the valve core 652 is connected to the outer cylinder 61 via a preload spring 653, and the preload of the preload spring 653 is the damping force limit of the overflow limiting damper 6.

[0084] When the output force of the overflow limiting damper 6 does not exceed the limit, the valve core 652 of the overflow valve 65 blocks the pressure relief outlet 655, and the overflow valve 65 closes.

[0085] When the output force of the overflow force-limiting damper 6 exceeds the limit, the pressure relief outlet 655 of the overflow valve 65 opens, and the first chamber 611a and the second chamber 611b of the overflow force-limiting damper 6 are connected through the pressure relief channel 651. The overflow valve 65 is activated, and the output force of the overflow force-limiting damper 6 decreases until it is less than or equal to the damping force limit, at which point the overflow valve 65 closes.

[0086] Example 6: refer to Figure 1-2 This embodiment provides a localized resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping. The vibration isolation platform specifically includes a load-bearing platform 2, a localized resonant three-dimensional vibration isolation support, and a biomimetic enhanced damping structure. The localized resonant three-dimensional vibration isolation support and the biomimetic enhanced damping structure are independently disposed between the vibration source plane 1 and the load-bearing platform 2. The vibration source plane 1 includes, but is not limited to, the ground or a floor. The load-bearing platform 2 is used to support vibrating objects such as buildings and equipment.

[0087] In this embodiment, the local resonance type three-dimensional vibration isolation support includes a local resonance type multi-stage disc spring support 3 and a local resonance type recyclable rubber support 4.

[0088] In this embodiment, the local resonant multi-stage disc spring support 3 is connected to the bearing platform 2 via the upper connecting plate 31 and to the local resonant regenerative rubber support via the middle connecting plate 32, and is used for vertical vibration isolation.

[0089] In this embodiment, the localized resonant multi-stage disc spring support includes three localized resonant disc spring systems: a disc spring assembly 34, a force transmission column 36, a force transmission plate 35, a first localized resonant oscillator 37, a first localized resonant spring 38, and a guide limiting column 33. In the localized resonant disc spring system, the force transmission plate 35 transmits vertical force to the disc spring assembly 34 via the force transmission column 36; the disc spring assembly 34 is fitted onto the guide limiting column 33 to prevent horizontal deformation; the first localized resonant oscillator 37 is connected to the bottom ends of the force transmission plate 35 and the guide limiting column 33 via the first localized resonant spring 38, and its vibration direction is vertical. The disc spring assembly 34 provides vertical load-bearing capacity and vertical stiffness, achieving vertical vibration isolation.

[0090] In this embodiment, the inner side of the guide limiting post 33 is provided with a three-level friction surface. It does not contact the first local resonant spring 38 but contacts the first local resonant oscillator 37. When the first local resonant oscillator 37 vibrates vertically inside the guide limiting post 33, it generates nonlinear frictional damping. The friction coefficients of the three-level friction surfaces inside the guide limiting post 33 are different. When the vertical distance between the contact point of the first local resonant oscillator 37 and the guide limiting post 33 is less than the radius of the first local resonant oscillator 37 when stationary, it is a first-level friction surface with a friction coefficient of 0.02. As the vertical distance increases to a point greater than the radius of the first local resonant oscillator 37 but less than its diameter, the friction surface becomes a second-level friction surface with a friction coefficient increasing to 0.05. As the vertical distance increases to a point greater than the diameter of the first local resonant oscillator 37, the friction surface becomes a third-level friction surface with a friction coefficient increasing to 0.1.

[0091] In this embodiment, the multiple local resonant disc spring systems in the local resonant multi-stage disc spring support can generate a band gap, blocking the transmission of vibration waves within the band gap in the local resonant multi-stage disc spring support.

[0092] In this embodiment, the local resonant recyclable rubber bearing 4 is connected to the local resonant multi-stage disc spring bearing 3 via a middle connecting plate 32, and connected to the ground or floor via a lower connecting plate 41, for horizontal vibration isolation. The local resonant recyclable rubber bearing 4 includes a bearing body 42, an annular steel plate 43, a friction plate 44, a second local resonant vibrator 45, a second local resonant spring 46, a telescopic hinge rod 47, and a second hinge point 48. The bearing body 42 is provided with several horizontal annular rubber layers 421, and the annular steel plates 43 are connected alternately, forming a cylindrical hollow area in the center, providing vertical bearing capacity and horizontal stiffness, and realizing horizontal vibration isolation.

[0093] In this embodiment, the support body 42 and the horizontal annular rubber layer 421 are made of epoxidized natural rubber with maleic anhydride-modified chitin as a macromolecular crosslinking agent, which has the ability to be repeatedly processed and is conducive to resource regeneration.

[0094] In this embodiment, the cylindrical hollow region of the localized resonant recyclable rubber bearing 4 is provided with a friction plate 44, a telescopic hinge rod 47, and a second hinge point 48. The friction plate 44 is connected to the annular steel plate 43, and the telescopic hinge rod 47 is connected to the friction plate 44 through the second hinge point 48. (Reference) Figure 2 The second local resonant oscillator 45 and the second local resonant spring 46 are placed on the friction plate 44 and connected to the telescopic hinge rod 47 through the second local resonant spring 46. They can vibrate in any horizontal direction and generate nonlinear friction damping during vibration.

[0095] In this embodiment, the surface of the friction plate 44 that contacts the second local resonant oscillator 45 is a three-level friction surface. The friction coefficients of the three levels of friction surfaces are different. When the radial distance between the contact point of the second local resonant oscillator 45 and the friction plate 44 is less than the diameter of the second local resonant oscillator 45 when it is stationary, it is a first-level friction surface with a friction coefficient of 0.02. As the radial distance increases to a value greater than the diameter of the second local resonant oscillator 45 but less than twice the diameter of the second local resonant oscillator 45, the friction surface becomes a second-level friction surface with a friction coefficient increasing to 0.05. As the radial distance increases to a value greater than twice the diameter of the second local resonant oscillator 45, the friction surface becomes a third-level friction surface with a friction coefficient increasing to 0.1.

[0096] In this embodiment, the second local resonant oscillator 45 and the second local resonant spring 46 of the local resonant type recyclable rubber support 4 together form a horizontal local resonant system, generating a band gap and blocking the transmission of vibration waves within the band gap in the local resonant type recyclable rubber support 4.

[0097] refer to Figure 1 In this embodiment, the biomimetic enhanced damping structure includes a biomimetic leg bone structure 5 formed by eight rigid rods 52 connected by a first hinge point 51, an overflow force-limiting damper 6, and a spring 7. Two overflow force-limiting dampers 6 and two springs 7 are each connected to the first hinge point 51 of the biomimetic leg bone structure 5.

[0098] In this embodiment, the biomimetic enhanced damping structure amplifies the vertical and horizontal vibrations of the platform, causing nonlinear enhanced deformation at both ends of the overflow force-limiting damper 6 and the spring 7. The overflow force-limiting damper 6 operates based on nonlinear enhanced deformation to achieve energy efficiency. The spring 7, also based on nonlinear enhanced deformation, can achieve positive stiffness, quasi-zero stiffness, and negative stiffness within a certain deformation range, adjusting the overall stiffness of the platform.

[0099] refer to Figure 4 In this embodiment, the overflow force-limiting damper 6 specifically includes an erbium ring 62, an outer cylinder 61, a piston moving chamber 611 (including a first chamber 611a and a second chamber 611b), a cavity 612, a piston rod 63, a piston 64, and an overflow valve 65. The overflow force-limiting damper 6 is connected to the first hinge point 51 in the biomimetic enhanced damping structure via the erbium ring 62. The piston 64 and piston rod 63 divide the cavity into the first chamber 611a and the second chamber 611b, and the piston rod 63 extends into the cavity 612. The cavity of the overflow force-limiting damper 6 is filled with silicone oil. The piston rod 63 of the overflow force-limiting damper 6 drives the piston 64 to move within the cavity, and the silicone oil flows through the gap between the piston 64 and the outer cylinder 61 to generate damping.

[0100] In this embodiment, the overflow valve 65 of the overflow force-limiting damper 6 is connected at one end to the first chamber 611a and at the other end to the second chamber 611b, and is used to limit the maximum output force of the overflow force-limiting damper 6. (Reference) Figure 5 In this embodiment, the overflow valve 65 in the overflow force-limiting damper 6 includes a pressure relief channel 651, a valve core 652, a preload spring 653, a silicone oil inlet 654, and a pressure relief outlet 655. The silicone oil inside the cavity of the overflow force-limiting damper 6 enters the pressure relief channel 651 of the overflow valve 65 through the silicone oil inlet 654, and the valve core 652 in the overflow valve 65 is connected to the outer cylinder 61 through the preload spring 653.

[0101] In this embodiment, the preload of the preload spring 653 in the overflow valve 65 is the damping force limit of the overflow force-limiting damper 6. When the output force of the overflow force-limiting damper 6 does not exceed the limit, the valve core 652 of the overflow valve 65 blocks the pressure relief outlet 655, and the overflow valve 65 is closed. When the output force of the overflow force-limiting damper 6 exceeds the limit, the pressure relief outlet 655 of the overflow valve 65 opens, the first chamber 611a and the second chamber 611b of the overflow force-limiting damper 6 are connected through the overflow valve 65, the overflow valve 65 is activated, the output force of the overflow force-limiting damper 6 decreases until it is less than or equal to the damping force limit, and then the overflow valve 65 closes.

[0102] In this embodiment of the local resonance type three-dimensional vibration isolation platform, when the equipment / structure on the bearing platform 2 vibrates, or when the ground / floor vibrates, the transmission of vibration within the platform can be effectively blocked, achieving three-dimensional vibration isolation. Specifically, during operation, the local resonance type multi-stage disc spring support 3 in the local resonance type three-dimensional vibration isolation support achieves vertical vibration isolation while generating a band gap through the local resonance system to block the transmission of vertical vibration waves. The multi-stage friction surfaces inside the guide limit column 33 achieve nonlinear damping behavior based on vibration deformation control. The local resonance type recyclable rubber support 4 achieves horizontal vibration isolation while generating a band gap through the local resonance system to block the transmission of horizontal vibration waves. The multi-stage friction surfaces on the friction plate surface achieve nonlinear damping behavior based on vibration deformation control. The recyclable rubber support 4 uses epoxidized natural rubber with maleic anhydride-modified chitin as a macromolecular crosslinking agent, possessing repeated processing properties, which is beneficial for resource reuse. The biomimetic leg bone structure 5 in the biomimetic efficiency-enhancing damping structure can achieve nonlinear amplification of the vertical and horizontal deformation of the platform; the spring 7 is driven by the amplified nonlinear deformation, which can generate positive stiffness, quasi-zero stiffness and negative stiffness within a certain deformation range, and flexibly adjust the overall stiffness of the platform; the overflow force-limiting damper 6 is driven by the amplified nonlinear deformation, thereby achieving energy efficiency enhancement; the overflow force-limiting damper 6 limits the maximum damping force of the device to no more than the preset value through the overflow valve 65, thereby achieving protection of local connection nodes.

[0103] When horizontal and vertical vibrations occur between the bearing platform 2 and the vibration source plane 1, the working principle of the local resonance type three-dimensional vibration isolation platform in this embodiment is as follows: In the localized resonance type three-dimensional vibration isolation bearing, the upper connecting plate 31 moves together with the bearing platform 2, and only undergoes vertical deformation with the middle connecting plate 32, without horizontal deformation; the lower connecting plate 41 moves together with the vibration source plane 1, and only undergoes horizontal deformation with the middle connecting plate 32, without vertical deformation. The first localized resonance oscillator 37 in the multi-stage disc spring bearing 3 vibrates vertically, and its vibration trajectory is confined to the hollow area inside the guide limiting column 33; during vibration, the first localized resonance oscillator 37 and the multi-stage friction surfaces inside the guide limiting column 33 undergo vertical relative deformation, generating nonlinear damping. The second localized resonance oscillator 45 in the regenerable rubber bearing 4 vibrates vertically, and its vibration trajectory is confined between the friction plate 44 in the hollow area between the horizontal annular rubber layer 421 and the annular steel plate 43; the second localized resonance oscillator 45 and the multi-stage friction surfaces on the surface of the friction plate 44 undergo horizontal relative deformation, generating nonlinear damping.

[0104] In the biomimetic enhanced damping structure, the first hinge point 51 of the biomimetic leg bone structure 5, which is connected to the bearing platform 2, moves together with the bearing platform 2, and the first hinge point 51, which is connected to the vibration source plane 1, moves together with the vibration source plane 1. Horizontal and vertical relative deformation occurs between the two first hinge points 51, and simultaneously, according to geometric rules, other first hinge points 51 in the biomimetic leg bone structure 5 undergo nonlinear horizontal and vertical deformation. The two connecting ends of the overflow force-limiting damper 6 and the spring 7, attached to the biomimetic leg bone structure 5, move together with the two adjacent first hinge points 51. The overflow force-limiting damper 6 and the spring 7 undergo nonlinear relative deformation along their axial directions, generating nonlinear damping and restoring force.

[0105] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping, disposed between the vibration source plane (1) and the vibrating object, characterized in that, The vibration isolation platform includes: (2) A bearing platform for supporting objects subjected to vibration. A local resonant three-dimensional vibration isolation support is installed between the vibration source plane (1) and the bearing platform (2); And, a biomimetic enhanced damping structure is provided between the vibration source plane (1) and the bearing platform (2); The local resonance type three-dimensional vibration isolation support includes a multi-level disc spring support (3) and a regenerable rubber support (4); wherein, the multi-level disc spring support (3) is composed of several local resonance disc spring systems and is used to achieve vertical vibration isolation; the regenerable rubber support (4) is located between the multi-level disc spring support (3) and the vibration source plane (1) and is used to achieve horizontal vibration isolation; The biomimetic enhanced damping structure includes a biomimetic leg structure (5) located between the vibration source plane (1) and the bearing platform (2). The biomimetic leg structure (5) is formed by a number of first hinge points (51) and a number of rigid rods (52), and at least one set of two first hinge points (51) not connected by rigid rods (52) are simultaneously connected to an overflow force-limiting damper (6) and a spring (7). The biomimetic leg structure (5) is used to nonlinearly amplify the vertical and horizontal vibrations of the bearing platform (2), thereby inducing nonlinear enhanced deformation at both ends of the overflow force-limiting damper (6) and the spring (7).

2. The local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 1, characterized in that, The multi-stage disc spring support (3) includes N×M local resonant disc spring systems; where N is the number of columns arranged around the circumference of the upper surface of the regenerable rubber support (4), N≥2; and M is the number of local resonant disc spring systems stacked sequentially in the vertical direction in each column, M≥2.

3. The local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 1, characterized in that, The top-level local resonant disc spring system is connected to the bearing platform (2) via the upper connecting plate (31), and the bottom-level local resonant disc spring system is connected to the recyclable rubber support (4) via the middle connecting plate (32). The local resonant disc spring system includes a guide limiting post (33) and a disc spring assembly (34) sleeved on the guide limiting post (33), and a force transmission plate (35) is provided between adjacent guide limiting posts (33) in the vertical direction. A force transmission column (36) is provided between the force transmission plate (35) and the disc spring assembly (34) to transmit vertical force to the disc spring assembly (34); The guide limiting post (33) is provided with a first local resonance oscillator (37). One end of the first local resonance oscillator (37) is connected to the bottom of the guide limiting post (33) through a first local resonance spring (38), and the other end is connected to the force transmission plate (35) or the middle connecting plate (32) through the first local resonance spring (38).

4. The local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 3, characterized in that, The contact surface between the guide limiting post (33) and the first local resonant oscillator (37) is provided with a three-level friction surface; definition d The vertical distance between a point on the contact surface and the contact point between the first local resonant oscillator (37) and the guide limiting post (33) when at rest; When vertical distance d Less than d At time 1, it is considered a first-order friction surface, with a friction coefficient set at 0.015-0.

025. d 1 represents 1 / 7 to 1 / 5 of the height inside the guide limit post; When vertical distance d Increase to greater than d 1 and less than d At time 2, the friction surface becomes a secondary friction surface, and the coefficient of friction increases to 0.04-0.

06. d 2 represents 1 / 4 to 1 / 2 of the height inside the guide limit post; When vertical distance d Increase to greater than d At time 2, the friction surface becomes a third-order friction surface, and the coefficient of friction increases to 0.08-0.

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5. The local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 1, characterized in that, The renewable rubber support (4) is connected to the multi-stage disc spring support (3) through the middle connecting plate (32) and to the vibration source plane (1) through the lower connecting plate (41); The renewable rubber support (4) includes a cylindrical support body (42), and its inner wall is provided with several horizontal annular rubber layers (421) at equal intervals from top to bottom. Annular steel plates (43) are provided alternately in the gaps formed by adjacent horizontal annular rubber layers (421). The horizontal annular rubber layer (421) encloses a cylindrical hollow region, within which a friction plate (44), a second local resonant oscillator (45), a second local resonant spring (46), a telescopic hinge rod (47), and a second hinge point (48) are provided. The friction plate (44) is connected to the annular steel plate (43) and is horizontally arranged. A second local resonant oscillator (45) is provided between adjacent friction plates (44), between friction plates (44) and the middle connecting plate (32), and between friction plates (44) and the lower connecting plate (41). The second local resonant oscillator (45) is connected to the corresponding telescopic hinge rod (47) through at least two second local resonant springs (46) to form a horizontal local resonant system; the upper end of the telescopic hinge rod (47) is connected to the friction plate (44) or the middle connecting plate (32) through the second hinge point (48), and the lower end is connected to the friction plate (44) or the lower connecting plate (41) through the second hinge point (48).

6. The local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 5, characterized in that, The contact surface between the friction plate (44) and the second local resonant oscillator (45) is a three-level friction surface; definition r The radial distance between a point on the contact surface and the contact point between the second local resonant oscillator (45) and the friction plate (44) when at rest; When radial distance r Less than r At time 1, it is considered a first-order friction surface, with a friction coefficient set at 0.015-0.

025. r 1 is 1 / 4 to 1 / 2 of the radius of the friction plate (44); When radial distance r Increase to greater than r 1 and less than r At time 2, the friction surface becomes a secondary friction surface, and the coefficient of friction increases to 0.04-0.

06. r 2 is 3 / 5 to 4 / 5 of the radius of the friction plate (44); When radial distance r Increase to greater than r At time 2, the friction surface becomes a third-order friction surface, and the coefficient of friction increases to 0.08-0.

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7. The local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 1, characterized in that, The main body of the bionic leg bone structure (5) is two quadrilateral structures formed by eight rigid rods (52) and seven first hinge points (51). The topmost first hinge point (51) of the bionic leg bone structure (5) is connected to the bearing platform (2), and the bottommost first hinge point (51) is connected to the vibration source plane (1). In each quadrilateral structure, an overflow limiting damper (6) and a spring (7) are simultaneously connected between two first hinge points (51) that are horizontal or nearly horizontal and not connected by a rigid rod (52).

8. A local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 1, characterized in that, The overflow force-limiting damper (6) includes an outer cylinder (61), an erbium ring (62), a piston rod (63), a piston (64), and an even number of symmetrically arranged overflow valves (65). The outer cylinder (61) is provided with a piston moving chamber (611) and a cavity (612), both of which are filled with silicone oil; one end of the piston rod (63) passes through the piston moving chamber (611) and extends into the cavity (612), and the other end extends out of the outer cylinder (61); the piston (64) provided on the piston rod (63) further divides the piston moving chamber (611) into a first chamber (611a) and a second chamber (611b); The piston rod (63) is connected to an erbium ring (62) at one end extending out of the outer cylinder (61) and at the other end opposite to the outer cylinder (61). The overflow force-limiting damper (6) is connected to the first hinge point (51) in the bionic leg bone structure (5) through the erbium rings (62) at both ends.

9. A local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 8, characterized in that, The overflow valve (65) includes a pressure relief channel (651) located in the outer cylinder (61), a valve core (652) and a preload spring (653), and the valve core (652) is connected to the outer cylinder (61) through the preload spring (653); The two ends of the pressure relief channel (651) are connected to the first chamber (611a) and the second chamber (611b) respectively, and one end is a silicone oil inlet (654) and the other end is a pressure relief outlet (655).

10. A local resonant three-dimensional vibration isolation platform based on biomimetic enhanced viscous damping according to claim 9, characterized in that, The preload of the preload spring (653) is the damping force limit of the overflow force-limiting damper (6); When the output force of the overflow limiting damper (6) does not exceed the limit, the valve core (652) of the overflow valve (65) blocks the pressure relief outlet (655), and the overflow valve (65) closes. When the output force of the overflow force-limiting damper (6) exceeds the limit, the pressure relief outlet (655) of the overflow valve (65) opens, and the first chamber (611a) and the second chamber (611b) of the overflow force-limiting damper (6) are connected through the pressure relief channel (651). The overflow valve (65) is activated, and the output force of the overflow force-limiting damper (6) decreases until it is less than or equal to the damping force limit, at which point the overflow valve (65) closes.

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