CN111895034A - Three-dimensional variable-rigidity limiting and shock-isolating device with damping - Google Patents
Three-dimensional variable-rigidity limiting and shock-isolating device with damping Download PDFInfo
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- CN111895034A CN111895034A CN202010725555.8A CN202010725555A CN111895034A CN 111895034 A CN111895034 A CN 111895034A CN 202010725555 A CN202010725555 A CN 202010725555A CN 111895034 A CN111895034 A CN 111895034A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
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- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/022—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using dampers and springs in combination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
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Abstract
The invention discloses a three-dimensional variable-stiffness limiting and shock-isolating device with damping, which comprises a bearing platform, wherein the bottom of the bearing platform is connected with a device limiting plate a through a plurality of steel springs, the device limiting plate a is connected with the bottom of the bearing platform through a limiting mechanism, the steel springs are sleeved on the outer side wall of the limiting mechanism, and the bottom of the device limiting plate a is connected with a device limiting plate b through a supporting cylinder. The three-dimensional variable-stiffness damping device comprises three parts, namely a damping device in the Z-axis direction, a damping device in the X-axis direction and a damping device in the Y-axis direction, and can be applied to three-dimensional damping and isolation.
Description
Technical Field
The invention relates to the technical field of shock insulation, in particular to a three-dimensional variable-stiffness limiting shock insulation device with damping.
Background
The basic shock insulation technology can effectively control the seismic response of the upper structure by reducing the rigidity of a shock insulation layer and reducing the natural vibration frequency of a shock insulation system. Based on the technology of reducing the rigidity of the shock insulation layer, the shock insulation layer deforms and correspondingly increases while the acceleration response of the structure is reduced, and a series of problems of structural collision, support bearing capacity reduction and the like are caused. Therefore, the negative stiffness concept is integrated in the variable stiffness device, the variable stiffness device is combined with the lead core rubber support to enable the stiffness of the seismic isolation layer to present different stiffness characteristics in different displacement states, the displacement of the seismic isolation layer can be controlled, and meanwhile the design requirements of different levels of seismic performance are met.
The existing negative stiffness shock insulation system is difficult to control the displacement of a shock insulation layer under different vibration effects, the response of an upper structure is reduced, a pre-pressed stiffness element easily causes additional structural load, and the shock insulation system is large in instability. Therefore, the shock insulation structure can realize different rigidity characteristics under the action of earthquakes at different levels, the rigidity element is protected from failure under large displacement through the limiting device, and the improvement of the stability of the shock insulation system becomes a hotspot of current research.
Therefore, a three-dimensional variable-stiffness limit shock isolation device with damping is provided to solve the problems.
Disclosure of Invention
The invention aims to provide a three-dimensional variable-stiffness limiting and shock-isolating device with damping, which can be applied to three-dimensional shock absorption and isolation. Under different displacement states, the device can present different rigidity attributes, the force opposite to the movement direction is provided in the initial stage, the force consistent with the movement direction is provided after the force reaches a certain distance, therefore, positive rigidity is provided under interference load to limit the displacement of the shock insulation layer, negative rigidity is provided under different seismic force effects, the displacement of the shock insulation layer is controlled, effective shock insulation is realized, and therefore the three-dimensional variable-rigidity limiting shock insulation device with damping is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a three-dimensional variable-stiffness limiting and shock-isolating device with damping comprises a bearing platform, wherein the bottom of the bearing platform is connected with a device limiting plate a through a plurality of steel springs, the device limiting plate a is connected with the bottom of the bearing platform through a limiting mechanism, the steel springs are sleeved on the outer side wall of the limiting mechanism, the bottom of the device limiting plate a is connected with a device limiting plate b through a supporting cylinder, the bottom of the bearing platform is fixedly connected with a supporting rod, the bottom of the supporting rod penetrates through the device limiting plate a and is fixedly connected with a central connecting block a, and the central connecting block a is connected with the outer side walls of two ends of the supporting cylinder through a variable-stiffness elastic;
the bottom of the device limiting plate b is fixedly connected with a translation frame a, the inner top of the translation frame a is connected with two parallel supporting plates a through a sliding mechanism, the two supporting plates a are connected through a connecting rod, two ends of the connecting rod penetrate through the supporting plates a and are connected with the inner side wall of the bottom of the translation frame a, opposite sides of the two supporting plates a are connected through four supporting cylinders, the outer side wall of the center of the connecting rod is fixedly sleeved with a center connecting block b, and the center connecting block b is connected with the outer side walls of two ends of the supporting cylinders through a variable-stiffness elastic mechanism;
the bottom fixedly connected with U template of backup pad an, the equal fixedly connected with translation frame b of top both ends lateral wall of U template, translation frame b's interior top is connected with two parallel arrangement's backup pad b, two through slide mechanism backup pad b passes through the connecting rod to be connected, the both ends of connecting rod all run through backup pad b and are connected, two with translation frame b's bottom inside wall backup pad b is relative one side is connected through four support cylinders, the fixed hub connection of central lateral wall of connecting rod has central connecting block b, central connecting block b is connected with support cylindrical both ends lateral wall through becoming rigidity elastic mechanism, two backup pad b passes through the base and connects.
Preferably, the limiting mechanism comprises a limiting rod fixedly connected to the bottom of the bearing platform, the bottom of the limiting rod penetrates through the device limiting plate a and extends towards the bottom of the device limiting plate a, and a movable opening corresponding to the limiting rod is formed in the device limiting plate a.
Preferably, the sliding mechanism comprises supporting blocks fixedly connected to two ends of the top of the supporting plate a and two ends of the top of the supporting plate b, the supporting blocks are respectively connected with the inner top of the translation frame a and the inner top of the translation frame b through sliding blocks, and sliding grooves corresponding to the sliding blocks are formed in the supporting blocks.
Preferably, the rigidity-variable elastic mechanism comprises a round hole sliding block which is sleeved on the outer side walls of two ends of the supporting cylinder in a sliding mode, the round hole sliding block is fixedly connected with a connecting block, the central connecting block a and the central connecting block b are connected with connecting pieces in a rotating mode, mounting grooves corresponding to the connecting pieces are formed in the connecting block, the central connecting block a and the central connecting block b, the connecting pieces correspond to each other in two modes, and the round hole sliding block is connected with the supporting cylinder through a fixing piece.
Preferably, the two corresponding connecting pieces are connected through a piston rod, and the spring element is sleeved on the outer side wall of the piston rod.
Preferably, the connecting member is connected to an inner sidewall of the mounting groove by a pin.
Preferably, the connecting block is connected with the round hole sliding block through a connecting bolt.
Preferably, the round hole sliding block is connected with the supporting cylinder through a connecting bolt.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
1. the three-dimensional variable-stiffness damping device comprises three parts, namely a damping device in the Z-axis direction, a damping device in the X-axis direction and a damping device in the Y-axis direction, and can be applied to three-dimensional vibration isolation, a spring element of the device can be compressed by ground motion caused by an earthquake to generate a mechanical property of variable stiffness, a force (positive stiffness) opposite to the motion direction is provided in the initial stage, and a force (negative stiffness) consistent with the motion direction is provided after a certain distance is reached, so that positive stiffness is provided for limiting displacement of a vibration isolation layer in small earthquake, and negative stiffness is provided for realizing vibration isolation effect in medium earthquake and large earthquake;
2. according to the shock isolation device, the interior of a spring element of the device is supported by a piston rod to keep stability during compression, the exterior of the spring element is hinged to a circular hole sliding block and can move on a supporting cylinder, shock absorption devices in three directions are connected in parallel through a connecting plate, the compression displacement amount of the spring element in the three directions is the same as the ground motion displacement amount through a connecting rod on a translation frame, the maximum displacement of the spring element is controlled through a U-shaped plate, the device is prevented from being failed due to overlarge offset of the spring element, and the stability of a shock isolation system is effectively improved;
3. in the invention, the device can inject liquid viscous damping into the piston rod, and absorb energy by utilizing turbulent flow resistance of the damping liquid when the mounting groove moves, and considering the reliability of the connection nodes at the two ends of the device, the damping liquid is expected to have larger energy consumption capacity under frequent earthquakes, the damping force is controllable under rare earthquakes, the liquid viscous damping liquid with the index smaller than 1 can be adopted, and the synergistic effect of additional damping and a pressure spring is realized, so that the displacement amplification of a shock insulation structure shock insulation layer caused by single negative stiffness is solved, and the displacement is effectively controlled;
4. according to the invention, the relative position of the connecting block on the round hole sliding block can be changed by adjusting the connecting bolt on the round hole sliding block, so that the spring element can move on different compression displacement intervals;
5. according to the invention, by changing the rigidity property of the steel spring under the bearing platform, the spring original piece of the Z-direction damping device can be in an original length or prepressing state, the vertical quasi-zero rigidity property of a partial structure in an initial state is met, and the multifunctional shock insulation effect is realized.
Drawings
FIG. 1 is a schematic structural diagram of a three-dimensional variable-stiffness limiting and shock-isolating device with damping provided by the invention;
FIG. 2 is a schematic structural diagram of the position A of the three-dimensional variable-stiffness limit shock isolation device with damping provided by the invention;
FIG. 3 is a schematic structural diagram of an X-axis damping device, a Y-axis damping device and a Z-axis damping device in a three-dimensional variable stiffness limit shock isolation device with damping provided by the invention.
In the figure: 1. a bearing platform; 2. a steel spring; 3. a strut; 4. a device limiting plate a; 5. a support cylinder; 6. a device limiting plate b; 7. a translation frame a; 8. a spring element; 9. a circular hole slider; 10. connecting blocks; 11. a limiting rod; 12. a central connecting block a; 13. a connecting rod; 14. a central connecting block b; 15. a support plate a; 16. a U-shaped plate; 17. a connecting plate; 18. a translation frame b; 19. a support plate b; 20. a base; 21. a piston rod; 22. a connecting member; 23. a bolt rod; 24. a slider; 25. a support block; 26. and a fixing member.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, the three-dimensional variable-stiffness limiting and shock-isolating device with damping comprises a bearing platform 1, wherein the bottom of the bearing platform 1 is connected with a device limiting plate a4 through a plurality of steel springs 2, the device limiting plate a4 is connected with the bottom of the bearing platform 1 through a limiting mechanism, the steel springs 2 are sleeved on the outer side wall of the limiting mechanism, the bottom of the device limiting plate a4 is connected with a device limiting plate b6 through a supporting cylinder 5, the bottom of the bearing platform 1 is fixedly connected with a supporting rod 3, the bottom of the supporting rod 3 penetrates through the device limiting plate a4 and is fixedly connected with a central connecting block a12, and a central connecting block a12 is connected with the outer side walls of two ends of the;
the bottom of the device limiting plate b6 is fixedly connected with a translation frame a7, the inner top of the translation frame a7 is connected with two parallel supporting plates a15 through a sliding mechanism, the two supporting plates a15 are connected through a connecting rod 13, two ends of the connecting rod 13 penetrate through the supporting plates a15 and are connected with the inner side wall of the bottom of the translation frame a7, opposite sides of the two supporting plates a15 are connected through four supporting cylinders 5, the outer side wall of the center of the connecting rod 13 is fixedly connected with a center connecting block b14, and the center connecting block b14 is connected with the outer side walls of two ends of each supporting cylinder 5 through a rigidity-variable elastic mechanism;
bottom fixedly connected with U template 16 of backup pad a15, the equal fixedly connected with translation frame b18 of top both ends lateral wall of U template 16, translation frame b 18's interior top is connected with two parallel arrangement's backup pad b19 through slide mechanism, two backup pads b19 pass through connecting rod 13 and connect, the both ends of connecting rod 13 all run through backup pad b19 and are connected with the bottom inside wall of translation frame b18, the relative one side of two backup pad b19 is connected through four support columns 5, the fixed central connecting block b14 that has cup jointed of the center lateral wall of connecting rod 13, central connecting block b14 is connected with the both ends lateral wall of support column 5 through becoming rigidity elastic mechanism, two backup pads b19 are connected through base 20.
Wherein, steel spring 2 can adopt different rigidity attributes according to the weight of different structure spare on cushion cap 1, and steerable Z is to the pre-compaction state of damping device's spring original paper, makes partial structure spare just realize the attribute of vertical quasi-zero rigidity when initial state, realizes multi-functional shock insulation effect.
Referring to fig. 3, the bearing platform 1, the steel spring 2, the support rod 3, the limiting rod 11, the center connecting block a12, the spring element 8, the support cylinder 5, the device limiting plate a4, the device limiting plate b6, the piston rod 21, the connecting piece 22 and the bolt rod 23 form a Z-axis damping device, so that vibration in the Z-axis direction can be damped, and force in the Z-axis direction can be damped.
The translation frame a7, the limiting rod 11, the center connecting block b14, the spring element 8, the supporting cylinder 5, the supporting plate a15, the U-shaped plate 16, the connecting plate 17, the piston rod 21, the connecting piece 22 and the bolt rod 23 form an X-axis damping device, so that vibration in the X-axis direction is damped conveniently, and force in the X-axis direction is buffered.
The translation frame b18, the limiting rod 11, the center connecting block b14, the spring element 8, the supporting cylinder 5, the supporting plate b19, the base 20, the piston rod 21, the connecting piece 22 and the bolt rod 23 form a Y-axis damping device, so that vibration in the Y-axis direction is damped, and force in the Y-axis direction is buffered.
Further, the limiting mechanism comprises a limiting rod 11 fixedly connected to the bottom of the bearing platform 1, the bottom of the limiting rod 11 penetrates through the device limiting plate a4 and extends towards the bottom of the device limiting plate a4, and a movable opening corresponding to the limiting rod 11 is formed in the device limiting plate a 4. The bearing platform 1 is limited to move up and down only.
Further, the sliding mechanism comprises supporting blocks 25 fixedly connected to two ends of the top of the supporting plate a15 and two ends of the top of the supporting plate b19, the supporting blocks 25 are respectively connected with the inner top of the translation frame a7 and the inner top of the translation frame b18 through sliders 24, and sliding grooves corresponding to the sliders 24 are formed in the supporting blocks 25. So as to limit the translation frame a7 to move only left and right, and the translation frame b18 to move only front and back.
The damping fluid can be further arranged inside the piston rod 21, the additional damping and the pressure spring have a synergistic effect, and therefore the problem of displacement amplification of a shock insulation layer of a shock insulation structure caused by single negative stiffness is solved, and the displacement is effectively controlled.
Further, become rigidity elastic mechanism and include that slip cup joints the round hole slider 9 on the lateral wall of support cylinder 5 both ends, fixedly connected with connecting block 10 on the round hole slider 9, connecting block 10, all rotate on central connecting block a12 and the central connecting block b14 and be connected with connecting piece 22, on the connecting block 10, all be provided with the mounting groove who corresponds with connecting piece 22 on the central connecting block a12 and on the central connecting block b14, two connecting pieces 22 that correspond pass through spring element 8 and connect, round hole slider 9 passes through mounting 26 and is connected with support cylinder 5. The spring elements 8 serve to cushion the vertical force applied to the platform 1, the horizontal force applied to the pan carriage a7, and the forward and backward force applied to the pan carriage b 18. The fixing member 26 is capable of fixing or adjusting the position of the circular hole slider 9 so that it can be fixed on the support cylinder 5 or can be slidably moved on the support cylinder 5.
Further, two corresponding connectors 22 are connected by a piston rod 21, and the spring element 8 is sleeved on the outer side wall of the piston rod 21.
Further, the connection member 22 is connected to the inner side wall of the mounting groove by a bolt 23. The connecting piece 22 is rotatably sleeved on the outer side wall of the bolt rod 23, so that the piston rod 21 is rotatably connected with the connecting block 10, the central connecting block a12 and the central connecting block b 14.
Further, the connecting block 10 is connected with the round hole sliding block 9 through a connecting bolt, a limiting sliding block is arranged on the connecting block 10, a limiting sliding groove corresponding to the limiting sliding block is arranged on one side, in contact with the connecting block 10, of the round hole sliding block 9, and the purpose is to prevent the connecting block 10 from rotating.
Wherein the device can be used for house construction.
After the device is installed, under the action of an X-axis seismic force, if the circular hole sliding block 9 is fixed on the supporting cylinder 5 through the fixing piece 26 and the U-shaped plate 16 moves left and right at the bottom of the translation frame a7, when the U-shaped plate 16 moves left, the central connecting block b14 moves left, the spring element 8 positioned on the left side of the central connecting block b14 is in an extrusion state, the spring element 8 positioned on the right side of the central connecting block b14 is in a stretching state, and the spring element 8 and viscous damping in the piston rod 21 jointly act to buffer and dissipate energy of the seismic force towards the left on the U-shaped plate 16; when the U-shaped plate 16 moves rightwards, the central connecting block b14 moves rightwards, the spring element 8 on the right side of the central connecting block b14 is in an extrusion state, the spring element 8 on the left side of the central connecting block b14 is in a stretching state, and the spring element 8 and viscous damping in the piston rod 21 act together to buffer and consume energy of seismic force of the U-shaped plate 16 in the rightwards direction.
Under the action of an X-axis seismic force, if the circular hole sliding block 9 slides on the supporting cylinder 5, and the U-shaped plate 16 moves left and right at the bottom of the translation frame a7, when the U-shaped plate 16 moves left, the central connecting block b14 moves left, the spring element 8 positioned on the left side of the central connecting block b14 is in an extrusion state, the spring element 8 positioned on the right side of the central connecting block b14 is in an original length state, the initial displacement section of the device generates a force opposite to the movement direction, namely positive stiffness is provided, the spring compression amount is gradually increased along with the increase of displacement, the device generates a force in the same movement direction as the movement direction, namely negative stiffness is provided, and when the left spring element 8 is compressed to a vertical plane, the negative stiffness is maximum, and the device can be combined with a rubber support to realize the shock; when the U-shaped plate 16 moves rightwards, the central connecting block b14 moves rightwards, the spring element 8 on the right side of the central connecting block b14 is in an extrusion state, the spring element 8 on the left side of the central connecting block b14 is in an original length state, the initial displacement section of the device generates a force opposite to the moving direction, namely positive stiffness is provided, the compression amount of the spring is gradually increased along with the increase of displacement, the device generates a force same with the moving direction, namely negative stiffness is provided, and when the spring element 8 on the right side is compressed to a vertical plane, the negative stiffness is maximum, and the shock insulation effect of variable stiffness can be realized by combining with a rubber support.
Under the action of a Y-axis seismic force, when the circular hole sliding block 9 is fixed on the supporting cylinder 5 through the fixing piece 26, and the base 20 moves back and forth at the bottom of the translation frame b18, when the base 20 moves forward, the central connecting block b14 moves forward, the spring element 8 positioned in front of the central connecting block b14 is in an extrusion state, the spring element 8 positioned behind the central connecting block b14 is in a stretching state, and the spring element 8 and viscous damping in the piston rod 21 act together to buffer and consume energy to the seismic force of the U-shaped plate 16 in the forward direction; when the base 20 moves backwards, the central connecting block b14 moves backwards, the spring element 8 located behind the central connecting block b14 is in an extrusion state, the spring element 8 located in front of the central connecting block b14 is in a stretching state, and the viscous damping in the spring element 8 and the piston rod 21 jointly acts to buffer the seismic force of the U-shaped plate 16 in the backward direction and consume energy.
Under the action of Y-axis seismic force, when the circular hole sliding block 9 slides on the supporting cylinder 5, and the base 20 moves back and forth at the bottom of the translation frame b18, when the base 20 moves forward, the central connecting block b14 moves forward, the spring element 8 positioned in front of the central connecting block b14 is in an extrusion state, the spring element 8 positioned behind the central connecting block b14 is in an original length state, the initial displacement section of the device generates force opposite to the movement direction, namely positive stiffness is provided, the spring compression amount is gradually increased along with the increase of displacement, the device generates force in the same direction as the movement direction, namely negative stiffness is provided, and when the spring element 8 in front is compressed to a vertical plane, the negative stiffness is maximum, and the device can be combined with a rubber support to realize the shock insulation effect of variable stiffness; when the base 20 moves backwards, the central connecting block b14 moves backwards, the spring element 8 located behind the central connecting block b14 is in an extrusion state, the spring element 8 located in front of the central connecting block b14 is in an original length state, the initial displacement section of the device generates a force opposite to the moving direction, namely positive stiffness is provided, the compression amount of the spring is gradually increased along with the increase of the displacement, the device generates a force the same as the moving direction, namely negative stiffness is provided, and when the spring element 8 at the back is compressed to a vertical plane, the negative stiffness is maximum, and the shock insulation effect of variable stiffness can be realized by combining with a rubber support.
Under the action of Z-axis seismic force, when the round hole sliding block 9 is fixed on the supporting cylinder 5 through the fixing piece 26 and the device limiting plate b6 moves up and down, when the device limiting plate b6 moves up, the central connecting block a12 moves up, the spring element 8 located below the central connecting block a12 is in a stretching state, the spring element 8 located above the central connecting block a12 is in a compressing state, and the spring element 8 and viscous damping in the piston rod 21 act together to buffer and dissipate energy of the upward seismic force applied to the U-shaped plate 16; when the device limiting plate b6 moves downwards, the central connecting block a12 moves downwards, the spring element 8 located below the central connecting block a12 is in a compressed state, the spring element 8 located above the central connecting block a12 is in a stretched state, and the spring element 8 and viscous damping in the piston rod 21 act together to buffer and dissipate energy of seismic force in the downward direction applied to the U-shaped plate 16.
Under the action of Z-axis seismic force, when the circular hole slider 9 slides on the support cylinder 5, and under the condition that the device limiting plate b6 moves up and down, when the device limiting plate b6 moves up, the central connecting block a12 moves up, the spring element 8 positioned below the central connecting block a12 is in an original length state, the spring element 8 positioned above the central connecting block a12 is in a compression state, the initial displacement section of the device generates force opposite to the movement direction, namely positive stiffness is provided, the compression amount of the spring is gradually increased along with the increase of displacement, the device generates force which is the same as the movement direction, namely negative stiffness is provided, and when the upper spring element 8 is compressed to a vertical plane, the negative stiffness is maximum, and the device can be combined with a rubber support to realize the shock insulation effect of variable stiffness; when the device limiting plate b6 moves downwards, the central connecting block a12 moves downwards, the spring element 8 located below the central connecting block a12 is in a compressed state, the spring element 8 located above the central connecting block a12 is in an original long state, the initial displacement section of the device generates a force opposite to the moving direction, namely positive stiffness is provided, the compression amount of the spring is gradually increased along with the increase of displacement, the device generates a force same with the moving direction, namely negative stiffness is provided, and when the spring element 8 below is compressed to a vertical plane, the negative stiffness is maximum, and the shock insulation effect of variable stiffness can be achieved by combining with a rubber support.
In addition, viscous damping fluid can be arranged in the piston rod 21, and the compression synergistic effect of the accompanying spring element 8 provides damping force, dissipates energy and controls the displacement of the seismic isolation layer. The mechanical property of the three-dimensional variable-stiffness shock isolation device can be changed by adjusting the coefficients of the steel spring 2, the spring element 8 and the damping fluid, so that positive stiffness is provided to limit the displacement of a shock isolation layer during small shock, and negative stiffness is provided to achieve the shock isolation effect during medium shock and large shock, thereby meeting the design requirements.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The three-dimensional variable-stiffness limiting and shock-isolating device with damping is characterized by comprising a bearing platform (1), wherein the bottom of the bearing platform (1) is connected with a device limiting plate a (4) through a plurality of steel springs (2), the device limiting plate a (4) is connected with the bottom of the bearing platform (1) through a limiting mechanism, the steel springs (2) are sleeved on the outer side wall of the limiting mechanism, the bottom of the device limiting plate a (4) is connected with a device limiting plate b (6) through a supporting cylinder (5), the bottom of the bearing platform (1) is fixedly connected with a supporting rod (3), the bottom of the supporting rod (3) penetrates through the device limiting plate a (4) and is fixedly connected with a central connecting block a (12), and the central connecting block a (12) is connected with the outer side walls at two ends of the supporting cylinder (5) through a variable-stiffness elastic mechanism;
the bottom of the device limiting plate b (6) is fixedly connected with a translation frame a (7), the inner top of the translation frame a (7) is connected with two parallel supporting plates a (15) through a sliding mechanism, the two supporting plates a (15) are connected through a connecting rod (13), two ends of the connecting rod (13) penetrate through the supporting plates a (15) and are connected with the inner side wall of the bottom of the translation frame a (7), the opposite sides of the two supporting plates a (15) are connected through four supporting cylinders (5), the outer central side wall of the connecting rod (13) is fixedly sleeved with a central connecting block b (14), and the central connecting block b (14) is connected with the outer side walls of two ends of each supporting cylinder (5) through a variable-rigidity elastic mechanism;
the bottom of the supporting plate a (15) is fixedly connected with a U-shaped plate (16), the outer side walls of the two ends of the top of the U-shaped plate (16) are fixedly connected with translation frames b (18), the inner top of the translation frame b (18) is connected with two parallel supporting plates b (19) through a sliding mechanism, the two supporting plates b (19) are connected through a connecting rod (13), two ends of the connecting rod (13) penetrate through the supporting plates b (19) and are connected with the inner side wall of the bottom of the translation frame b (18), one opposite side of the two supporting plates b (19) is connected through four supporting columns (5), the central outer side wall of the connecting rod (13) is fixedly sleeved with a central connecting block b (14), the central connecting block b (14) is connected with the outer side walls of two ends of the supporting cylinder (5) through a variable stiffness elastic mechanism, and the two supporting plates b (19) are connected through a base (20).
2. The three-dimensional variable-stiffness limit and isolation device with damping as claimed in claim 1, wherein the limit mechanism comprises a limit rod (11) fixedly connected to the bottom of the bearing platform (1), the bottom of the limit rod (11) penetrates through the device limit plate a (4) and extends towards the bottom of the device limit plate a (4), and a movable opening corresponding to the limit rod (11) is arranged on the device limit plate a (4).
3. The three-dimensional variable stiffness limit vibration isolation device with damping as claimed in claim 1, wherein the fixing mechanism comprises support blocks (25) fixedly connected to two ends of the top of the support plate a (15) and two ends of the top of the support plate b (19), the support blocks (25) are respectively connected with the inner top of the translation frame a (7) and the inner top of the translation frame b (18) through slide blocks (24), and slide grooves corresponding to the slide blocks (24) are arranged on the support blocks (25).
4. The three-dimensional variable-stiffness limiting and shock-isolating device with damping as claimed in claim 1, wherein the variable-stiffness elastic mechanism comprises circular hole sliders (9) slidably sleeved on outer side walls of two ends of the support cylinder (5), the circular hole sliders (9) are fixedly connected with connecting blocks (10), the central connecting blocks a (12) and the central connecting blocks b (14) are rotatably connected with connecting pieces (22), mounting grooves corresponding to the connecting pieces (22) are formed in the connecting blocks (10), the central connecting blocks a (12) and the central connecting blocks b (14), the two corresponding connecting pieces (22) are connected through spring elements (8), and the circular hole sliders (9) are connected with the support cylinder (5) through fixing pieces (26).
5. The three-dimensional variable stiffness limit vibration isolation device with damping as claimed in claim 4, wherein two corresponding connecting pieces (22) are connected through a piston rod (21), and the spring element (8) is sleeved on the outer side wall of the piston rod (21).
6. The three-dimensional variable stiffness seismic isolation device with damping as set forth in claim 4, wherein the connecting member (22) is connected with the inner side wall of the mounting groove by a bolt (23).
7. The three-dimensional variable stiffness limit vibration isolation device with damping as claimed in claim 4, wherein the connecting block (10) is connected with the round hole sliding block (9) through a connecting bolt.
8. The three-dimensional variable stiffness limit vibration isolation device with damping as claimed in claim 4, wherein the round hole slider (9) is connected with the support cylinder (5) through a connecting bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010725555.8A CN111895034A (en) | 2020-07-24 | 2020-07-24 | Three-dimensional variable-rigidity limiting and shock-isolating device with damping |
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|---|---|---|---|
| CN202010725555.8A CN111895034A (en) | 2020-07-24 | 2020-07-24 | Three-dimensional variable-rigidity limiting and shock-isolating device with damping |
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| CN111895034A true CN111895034A (en) | 2020-11-06 |
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| CN202010725555.8A Withdrawn CN111895034A (en) | 2020-07-24 | 2020-07-24 | Three-dimensional variable-rigidity limiting and shock-isolating device with damping |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309220A (en) * | 2021-06-16 | 2021-08-27 | 重庆具得建筑工程有限公司 | Fabricated building and construction process thereof |
| CN115182476A (en) * | 2022-08-11 | 2022-10-14 | 安徽工业大学 | Three-dimensional shock isolation system capable of achieving elastic limiting at ordinary times and unilateral limiting during working |
-
2020
- 2020-07-24 CN CN202010725555.8A patent/CN111895034A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309220A (en) * | 2021-06-16 | 2021-08-27 | 重庆具得建筑工程有限公司 | Fabricated building and construction process thereof |
| CN115182476A (en) * | 2022-08-11 | 2022-10-14 | 安徽工业大学 | Three-dimensional shock isolation system capable of achieving elastic limiting at ordinary times and unilateral limiting during working |
| CN115182476B (en) * | 2022-08-11 | 2024-03-29 | 安徽工业大学 | Three-dimensional vibration isolation system capable of achieving elastic limiting at ordinary times and unilateral limiting during working |
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