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CN-121993539-A - Local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping

CN121993539ACN 121993539 ACN121993539 ACN 121993539ACN-121993539-A

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 multistage disc spring support and a renewable rubber support, vertical and horizontal vibration isolation is achieved, sufficient vertical bearing capacity is provided, a local resonance system is arranged to generate band gaps to further block transmission of elastic waves in a vibration isolation platform, a bionic synergistic damping structure comprises a bionic leg bone structure, a spring and an overflow force limiting damper, deformation of the overflow force limiting damper and the spring is amplified in a nonlinear mode through the bionic synergistic damping structure, and energy consumption synergy and rigidity adjustment are achieved. Compared with the prior art, the invention can effectively block the transmission of vibration in the platform and realize three-dimensional vibration isolation.

Inventors

  • YANG KAI
  • DING SUNWEI
  • ZHAO ZHIPENG
  • WU MINJUN
  • ZHENG CHAOFAN

Assignees

  • 上海材料研究所有限公司

Dates

Publication Date
20260508
Application Date
20260323

Claims (10)

  1. 1. The utility model provides a three-dimensional vibration isolation platform of local resonance formula based on bionical synergy viscous damping, sets up between vibration source plane (1) and the object that shakes, its characterized in that, vibration isolation platform includes: A bearing platform (2) for bearing the vibration object; the local resonance type three-dimensional vibration isolation support is arranged between the vibration source plane (1) and the bearing platform (2); the bionic synergistic damping structure is arranged between the vibration source plane (1) and the bearing platform (2); The local resonance type three-dimensional vibration isolation support comprises a multi-stage disc spring support (3) and a renewable rubber support (4), wherein the multi-stage disc spring support (3) consists of a plurality of local resonance disc spring systems and is used for realizing vertical vibration isolation, and the renewable rubber support (4) is arranged between the multi-stage disc spring support (3) and a vibration source plane (1) and is used for realizing horizontal vibration isolation; The bionic synergistic damping structure comprises a bionic leg structure (5) arranged between a vibration source plane (1) and a bearing platform (2), wherein the bionic leg structure (5) is formed by a plurality of first hinge points (51) and a plurality of rigid rods (52), at least one group of two first hinge points (51) which are not connected through the rigid rods (52) are simultaneously connected with an overflow force limiting damper (6) and a spring (7), and the bionic leg structure (5) is used for non-linearly amplifying vertical and horizontal vibration of the bearing platform (2) so as to induce non-linear synergistic deformation of two ends of the overflow force limiting damper (6) and the spring (7).
  2. 2. The bionic synergistic viscous damping-based local resonance type three-dimensional vibration isolation platform is characterized in that the multistage disc spring support (3) comprises N multiplied by M local resonance disc spring systems, N is the number of columns arranged along the circumference of the upper surface of the renewable rubber support (4), N is more than or equal to 2;M and is the number of the local resonance disc spring systems which are sequentially overlapped in the vertical direction in each column, and M is more than or equal to 2.
  3. 3. The local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping according to claim 1, wherein the local resonance disc spring system of the top layer is connected with the bearing platform (2) through an upper connecting plate (31), and the local resonance disc spring system of the bottom layer is connected with the renewable rubber support (4) through a middle connecting plate (32); The local resonance disc spring system comprises guide limit posts (33), disc spring groups (34) sleeved on the guide limit posts (33), and a force transmission plate (35) is arranged between adjacent guide limit posts (33) along the vertical direction; A force transmission column (36) is arranged between the force transmission plate (35) and the disc spring set (34) and used for transmitting vertical force to the disc spring set (34); The guiding limiting column (33) is internally provided with a first local resonance oscillator (37), one end of the first local resonance oscillator (37) is connected with the bottom of the guiding limiting column (33) through a first local resonance spring (38), and the other end of the first local resonance oscillator is connected with the force transmission plate (35) or the middle connecting plate (32) through the first local resonance spring (38).
  4. 4. A local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping according to claim 3, wherein the contact surface of the guiding limit column (33) and the first local resonance vibrator (37) is provided with a three-level friction surface; D is defined as the vertical distance between a certain point on the contact surface and the contact point of the first local resonance vibrator (37) and the guide limit column (33) when the contact surface is static; when the vertical distance d is smaller than d 1 , the friction surface is the first-level friction surface, the friction coefficient is set to be 0.015-0.025, and d 1 is 1/7~1/5 of the height in the guiding limiting column; When the vertical distance d is increased to be more than d 1 and less than d 2 , the friction surface is a secondary friction surface, the friction coefficient is increased to be 0.04-0.06, and d 2 is 1/4-1/2 of the height in the guiding limit column; when the vertical distance d is increased to be more than d 2 , the friction surface is a three-level friction surface, and the friction coefficient is increased to 0.08-0.12.
  5. 5. The local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping according to claim 1, wherein the renewable rubber support (4) is connected with the multi-stage disc spring support (3) through a middle connecting plate (32) and is connected with the vibration source plane (1) through a lower connecting plate (41); the renewable rubber support (4) comprises a cylindrical support main body (42), wherein a plurality of horizontal annular rubber layers (421) are arranged on the inner wall of the cylindrical support main body from top to bottom at equal intervals, and annular steel plates (43) are alternately arranged in gaps formed by adjacent horizontal annular rubber layers (421); The horizontal annular rubber layer (421) is enclosed to form a cylindrical hollow area, a friction plate (44), a second local resonance vibrator (45), a second local resonance spring (46), a telescopic hinging rod (47) and a second hinging point (48) are arranged in the hollow area, the friction plate (44) is connected with the annular steel plate (43) and is horizontally arranged, and the second local resonance vibrator (45) is arranged between every two adjacent friction plates (44), between each friction plate (44) and the middle connecting plate (32) and between each friction plate (44) and the lower connecting plate (41); the second local resonance vibrators (45) are connected with corresponding telescopic hinging rods (47) through at least two second local resonance springs (46) to form a horizontal local resonance system, the upper ends of the telescopic hinging rods (47) are connected with the friction plates (44) or the middle connecting plates (32) through second hinging points (48), and the lower ends of the telescopic hinging rods are connected with the friction plates (44) or the lower connecting plates (41) through the second hinging points (48).
  6. 6. The bionic synergistic viscous damping-based local resonance type three-dimensional vibration isolation platform according to claim 5, wherein the contact surface of the friction plate (44) and the second local resonance vibrator (45) is a three-level friction surface; Defining r as the radial distance between a certain point on the contact surface and the contact point of the second local resonator (45) and the friction plate (44) when the contact surface is stationary; When the radial distance r is smaller than r 1 , the friction surface is the first-level friction surface, the friction coefficient is set to be 0.015-0.025, and r 1 is 1/4-1/2 of the radius of the friction plate (44); When the radial distance r is increased to be more than r 1 and less than r 2 , the friction surface is a secondary friction surface, the friction coefficient is increased to be 0.04-0.06, and r 2 is 3/5~4/5 of the radius of the friction plate (44); When the radial distance r is increased to be more than r 2 , the friction surface is a three-stage friction surface, and the friction coefficient is increased to be 0.08-0.12.
  7. 7. The local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping according to claim 1, wherein the main body of the bionic leg structure (5) is two quadrilateral structures formed by eight rigid rods (52) and seven first hinge points (51), the first hinge point (51) at the top part in the bionic leg structure (5) is connected with the bearing platform (2), and the first hinge point (51) at the bottom part is connected with the vibration source plane (1); An overflow force limiting damper (6) and a spring (7) are connected between two first hinge points (51) which are horizontal or approximately horizontal and are not connected through a rigid rod (52) in each quadrilateral structure.
  8. 8. The local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping according to claim 1, wherein the overflow force limiting damper (6) comprises an outer cylinder (61), an erbium ring (62), a piston rod (63), a piston (64) and a plurality of overflow valves (65) which are symmetrically arranged; The piston rod (63) is provided with a piston moving cavity (611) and a cavity (612), the piston moving cavity (611) and the cavity (612) are filled with silicone oil, one end of the piston rod (63) penetrates through the piston moving cavity (611) and stretches into the cavity (612), and the other end of the piston rod stretches out of the outer cylinder (61), and the piston (64) arranged on the piston rod (63) further divides the piston moving cavity (611) into a first cavity (611 a) and a second cavity (611 b); One end of the piston rod (63) extending out of the outer cylinder (61) and the other end opposite to the outer cylinder (61) are both connected with erbium rings (62), and the overflow force limiting damper (6) is respectively connected with a first hinge point (51) in the bionic leg bone structure (5) through the erbium rings (62) at two ends.
  9. 9. The local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping according to claim 8, wherein the overflow valve (65) comprises a pressure release channel (651) arranged in the outer cylinder (61), a valve core (652) and a pre-compression spring (653), and the valve core (652) is connected with the outer cylinder (61) through the pre-compression spring (653); Two ends of the pressure release channel (651) are respectively communicated with the first cavity (611 a) and the second cavity (611 b), one end of the pressure release channel is a silicone oil inlet (654), and the other end of the pressure release channel is a pressure release outlet (655).
  10. 10. The local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping according to claim 9, wherein the pre-pressure of the pre-pressure spring (653) is the damping force limit value of the overflow force limiting damper (6); When the output of the overflow force limiting type damper (6) does not exceed the limit value, a valve core (652) of the overflow valve (65) blocks the pressure relief outlet (655), and the overflow valve (65) is closed; When the output of the overflow force limiting damper (6) exceeds the limit value, a pressure relief outlet (655) of the overflow valve (65) is opened, a first chamber (611 a) and a second chamber (611 b) of the overflow force limiting damper (6) are communicated through a pressure relief channel (651), the overflow valve (65) is started, the output of the overflow force limiting damper (6) is reduced until the output is smaller than or equal to the damping force limit value, and the overflow valve (65) is closed.

Description

Local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping Technical Field The invention relates to the technical field of vibration control, in particular to a local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping. Background In the vibration control technology, the vibration isolation technology achieves the purpose of isolating vibration transmission by arranging a flexible vibration isolation layer between a vibration source and a vibration-receiving object, is widely applied to the fields of building structures, bridges, industrial equipment and the like at present, and has good effects on isolating earthquake, induced vibration and environmental vibration. The vibration isolation layer generally comprises a vibration isolation device and an energy dissipation device, wherein the existing vibration isolation device comprises a laminated rubber support, a lead rubber support, a friction pendulum support and the like, and the existing energy dissipation device comprises a viscous damper, a metal damper and the like. However, most of the existing vibration isolation devices can only realize horizontal or vertical vibration isolation, and the development and the application of the three-dimensional vibration isolation device are less. The existing rubber recovery technology is difficult to realize cyclic processing, resource waste and environmental problems are easy to cause, and the friction pendulum type support is limited in practical application due to the fact that the tensile capacity is lost and the long-term service capacity is weak. In addition, the existing vibration damage data show that the vibration isolation layer can lighten the vibration response of an upper structure or equipment, but the problem of overlarge displacement still exists in the vibration isolation layer, so that an internal pipeline or other non-structural components in the vibration isolation layer can be damaged, and the connecting node of the energy consumption device is easily damaged due to overlarge output force of the device, such as cracking of a concrete pier and the like. CN113668711a discloses a three-dimensional vibration isolation/vibration isolation support with horizontal bidirectional and vertical deformation decoupling, through adding a deformation decoupling device on the vertical vibration isolation support, the three-dimensional decoupling of horizontal and vertical deformation is realized, the problem that the vibration isolation and vibration isolation effect of the traditional support under the coupling of horizontal and vertical deformation is poor is solved, and the shock resistance and the safety of the structure are improved. However, the vibration isolation/vibration support can only prolong the self-vibration period of the controlled structure/equipment through the low-rigidity property of the vibration isolation/vibration support, so that the dynamic response of the structure/equipment is reduced, the vibration isolation/vibration support does not have energy consumption capability, cannot realize displacement control of a vibration isolation layer, does not have the special band gap property of a metamaterial, and cannot completely block transmission of elastic waves (such as earthquake waves, equipment vibration and the like) in the vibration isolation/vibration layer. Therefore, the energy consumption efficiency of the energy consumption device in the existing vibration isolation/vibration layer still has a further improvement space, and the problem of limiting force of the energy consumption device is also needed to be solved. In addition, the isolation of the elastic waves by the vibration isolation/vibration mount still has room for improvement. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping so as to improve the energy consumption efficiency of energy consumption devices in a vibration isolation layer and the isolation effect on elastic waves. The aim of the invention can be achieved by the following technical scheme: the invention provides a local resonance type three-dimensional vibration isolation platform based on bionic synergistic viscous damping, which is arranged between a vibration source plane and a vibration-receiving object, and comprises: The bearing platform is used for bearing the vibration object; The local resonance type three-dimensional vibration isolation support is arranged between the vibration source plane and the bearing platform; the bionic synergistic damping structure is arranged between the vibration source plane and the bearing platform; The local resonance type three-dimensional vibration isolation support comprises a multi-stage disc spring support and a renewable rubber support, wherein the