CN209054009U - The ternary vibration absorber of parallel connection used matter and spring unit - Google Patents
The ternary vibration absorber of parallel connection used matter and spring unit Download PDFInfo
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- CN209054009U CN209054009U CN201821735517.5U CN201821735517U CN209054009U CN 209054009 U CN209054009 U CN 209054009U CN 201821735517 U CN201821735517 U CN 201821735517U CN 209054009 U CN209054009 U CN 209054009U
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Abstract
The utility model belongs to structural vibration control technology field, in particular to a kind of ternary vibration absorber of used matter and spring unit in parallel, the device includes spring unit, damping unit and used matter unit, wherein spring unit is in parallel with used matter unit, and then connects to form ternary vibration damping configuration with damping unit.The utility model realizes the ternary vibration damping configuration of a kind of used matter and spring unit in parallel using two sets of ball-screw-transmission systems, can play tunning effect to damping force, give full play to the energy dissipation capacity of damping unit, improve the passive energy dissipation efficiency of vibration absorber.Furthermore assembled technology is used, has many advantages, such as that easily adjusting, durability is good, energy dissipation capacity is high.
Description
Technical field
The utility model belongs to structural vibration control technology field, in particular to a kind of parallel connection is used to the three of matter and spring unit
First vibration absorber.
Background technique
In recent years, structure negative stiffness vibration control theory, and passive, the adaptive resistance of " Negative stiffness spring unit " in parallel
The research and development of Buddhist nun's device provide new theoretical method and technological means for lift structure vibration control effect；With quality enlarge-effect
" Inerter " (two node inertia mass units, referred to as " used matter unit ") provide new basic unit for damper research and development, hinder
Buddhist nun's device configuration has obtained further enriching, and ultimately forms the structure ternary based on " damping unit-spring unit-is used to matter unit "
Passive vibration absorbing theory blank.Studies have shown that with traditional " damping unit " unitary vibration damping, with " damping unit-spring unit ",
" damping unit-is used to matter unit " is that the binary vibration damping of representative is compared, and the passive vibration damping of ternary is expected to further lift structure vibration control
Effect processed.
Currently, the research and development of binary vibration absorber are more than ternary passive absorber, two kinds of devices mostly by damping unit and are used to
Matter unit is blended with ball screw system, thus realize the dual amplification of inertia mass and Equivalent damping coefficient, enhancing damping
The energy dissipation capacity of device.The main implementation of each unit is specific as follows: damping unit uses viscous material or electromagnetic damping technology；
Spring unit uses spring or mangneto rigidity；Used matter unit uses inertial flywheel.According to the difference of magnetic field sources, electromagnetic damper can
It is divided into electric excitation type, magneto, composite excitation formula；According to the conductor form of the composition, electromagnetic damper can be divided into motor damping device and
Eddy current damper, wherein eddy current damper can be divided into flat straight line, axial relative movement formula and axial rotary etc. again.
The implementation of spring is broadly divided into symmetrical pre-compressed spring (negative stiffness) or traditional drawing-pressing spring (positive rigidity), and mangneto rigidity can adopt
Positive negative stiffness is formed with permanent magnet or electromagnet.
Compared with traditional viscous damper, using electromagnetic induction energy consumption electromagnetic damper have contactless, low friction,
The advantages that pollution-free, wherein eddy current damper is widely used to the neck such as vehicle suspension, automobile brake machinery, aerospace
Domain mainly provides damping unit in the mature application of field of civil engineering for tuned mass damper, and mostly uses straight line flat
Template.Currently, eddy-current damping technology and ball screw system are blended to form rotary electric eddy current damping technology, Neng Gouxian
It writes and promotes eddy-current damping energy efficiency, realize the eddy current damper design of large-tonnage.Furthermore studies have shown that with traditional tension and compression
Spring (positive rigidity) is compared with the positive rigidity of mangneto, and symmetrical pre-compressed spring (negative stiffness) and mangneto negative stiffness can amplify damper
Displacement enhancing energy dissipation capacity.
It is consulted according to document and patent, some scholars have carried out correlation to the ternary vibration absorber of following three kinds of structural forms
Research: 1) Wen (Design and Evaluation of Tuned Inerter-Based Dampers for the
Seismic Control of MDOF Structures) use H2Gradient method obtains TVMD and TID applied to multiple degrees of freedom
The optimized parameter of structural system vibration damping optimizes；2)Ikago(Seismic control of single-degree-of-
Freedom structure using tuned viscous mass damper) carry out the vibration of TVMD SDOF structures
Control experiment；3)Asai(Outrigger tuned inertial mass electromagnetic transducers for
High-rise buildings subject to long period earthquakes) propose a kind of TEMD device material object
Figure；4)Lazar(Using An Inerter-based Device for Structural Vibration
Suppression the passive vibration control system of a kind of damping in parallel and spring unit is proposed) to reduce civil engineering knot
Vibration of the structure under basic excitation；5) Giaralis and Taflanidis (Optimal Tuned Mass-damper-inerter
(TMDI)Design for Seismically Excited MDOF Structures with Model Uncertainties
Based on Reliability Criteria) use reliability method to carry out parameter optimization to TMDI and TID；6) it announces
Number CN 107419945A proposes a kind of by viscous damping, drawing-pressing spring and the concatenated ternary vibration absorber of inertial flywheel；But with
Upper scholar does not carry out research and discovery to the ternary vibration absorber of used matter in parallel and spring unit.This configuration can be to damping force
Tunning effect is played, the energy dissipation capacity of damping unit is given full play to, improves the passive energy dissipation efficiency of vibration absorber, therefore, at present
It is further deep there is still a need for making from ternary vibration absorber of the theoretical and utility unit test level to used matter in parallel and spring unit
Enter research.
Summary of the invention
Aiming at the problems existing in the prior art, the utility model provides a kind of matter in parallel used and the ternary of spring unit subtracts
Vibrating device, fusion rotary electric eddy current damping, inertial flywheel and electromagnet mangneto rigidity technology, using two sets of ball screw systems
It is in parallel with spring unit to realize used matter unit, so with the concatenated configuration of damping unit, which can play damping force
Tunning effect can give full play to the energy dissipation capacity of damping unit, improve the passive energy dissipation efficiency of vibration absorber.
To achieve the goals above, the following technical solution is employed for the utility model:
The utility model provides the ternary vibration absorber of a kind of used matter and spring unit in parallel, including spring unit, resistance
It connects after Buddhist nun's unit and used matter unit, the used matter unit and spring unit are in parallel with damping unit；The damping unit includes
First ball screw system, the first hot-wire coil of muti-piece conductor plate, two pieces of E shaped iron cores and multiple groups, the first ball screw system
System includes the first ball screw and the first ball nut for being sleeved on the first ball screw, first ball screw from up to
Under pass through the first ball nut and conductor plate；The used matter unit includes the second ball screw system and flywheel, and described the
Two ball screw systems include the second ball screw and the second ball nut for being sleeved on the second ball screw, second rolling
Ballscrew passes through flywheel and the second ball nut from top to bottom；The spring unit includes movement electromagnet, Motionless electromagnetic
Body, linear bearing and linear guide, the linear guide pass through movement electromagnet, stationary magnet and linear bearing.
Further, the damping unit further includes the first outer cylinder, the first plectane and the second plectane, and first plectane is solid
It is scheduled on the upper end of the first outer tube inner wall, second plectane is fixed on the centre of the first outer tube inner wall, first plectane and
The center of two plectanes is respectively embedded into the first thrust bearing and the second thrust bearing, first thrust bearing and the second thrust bearing
It is sleeved on the first ball screw.
Further, two pieces of E shaped iron cores are symmetrically fixed on the inner wall of the first outer cylinder, and stay between every piece of conductor plate
There is gap；Every piece of E shaped iron core winds the first hot-wire coil of multiple groups, and the current direction of adjacent first hot-wire coil is on the contrary, magnetic pole phase
Instead, the central axes of first hot-wire coil are perpendicular to the first ball screw.
Further, first ball screw passes through the first ball nut from top to bottom, the first thrust bearing, leads
Body plate and the second thrust bearing, first ball nut are fixedly connected with the lower end of the first connector, first connector
Upper end for hollow cylinder, first connector is equipped with upper connecting pin.
Further, the used matter unit further includes third plectane and the 4th plectane, and the third plectane is fixed on first
The lower end of outer tube inner wall, the 4th plectane are fixed between the second plectane and third plectane；The third plectane and the 4th circle
The center of plate is respectively embedded into third thrust bearing and the 4th thrust bearing, and the third thrust bearing and the 4th thrust bearing cover
On the second ball screw, second ball screw passes through the 4th thrust bearing, flywheel, third thrust from top to bottom
Bearing and the second ball nut；Second ball nut is fixedly connected with the upper end of the second connector, second connector
For hollow cylinder.
Further, the spring unit further includes the second outer cylinder, and upper end and the third plectane of second outer cylinder are fixed
Connection；The linear bearing includes first straight line bearing and second straight line bearing, and the stationary magnet includes the first fixed electricity
Magnet and the second stationary magnet, the fixed electricity of the first straight line bearing, second straight line bearing, the first stationary magnet and second
Magnet is each attached to the inner wall of the second outer cylinder, and the first stationary magnet, the centre bore of the second stationary magnet and linear guide
Between there are gaps；The linear guide passes through second straight line bearing, the second stationary magnet, movement electromagnetism from top to bottom
Body, the first stationary magnet and first straight line bearing；The upper end of the linear guide is fixedly connected with the second connector, and lower end is set
There is lower connecting pin；Second ball nut and the second connector are arranged at the inside of the second outer cylinder.
Further, the movement electromagnet, the first stationary magnet and the second stationary magnet inside wind the
Two hot-wire coils；The current direction of second hot-wire coil of first stationary magnet and the second stationary magnet is identical, magnetic
It is extremely identical, while it is opposite with the magnetic pole of adjacent stationary magnet respectively to move electromagnet both ends magnetic pole.
Further, the central axes of first ball screw, the second ball screw and linear guide are located at same straight line,
There are gaps between first ball screw and the second ball screw.
Compared with prior art, the utility model has the advantage that
1, a kind of ternary vibration absorber of used matter and spring unit in parallel of the utility model, fusion rotary electric vortex resistance
Buddhist nun, inertial flywheel and electromagnet mangneto rigidity technology, realize used matter unit and spring unit using two sets of ball screw systems
Parallel connection, so with the concatenated ternary vibration damping configuration of damping unit, and tunning effect is played to damping force, is expected to obviously improve and subtracts
The energy dissipation capacity of vibrating device.
2, damping unit uses ball screw system and rotary electric eddy current damping technology, significantly improves eddy-current damping
Coefficient overcomes the deficiency of viscous tradition, viscoelastic damper easy oil leakage, durability difference.Meanwhile damping unit magnetic field sources use
E shaped iron core and the first hot-wire coil can be easy to be quick by adjusting current strength and input characteristics in the first hot-wire coil
Adjusting eddy-current damping power amplitude, and realize eddy-current damping power nonlinear characteristic.
3, compared with the positive rigidity of traditional drawing-pressing spring, spring unit can form the positive negative stiffness of mangneto using electromagnet, pass through
The initial clear spacing adjusted between current strength, direction and stationary magnet in the second hot-wire coil of electromagnet realizes elastic force
Amplitude adjusting, positive and negative stiffness characteristics and non-linear displacement.
4, the parallel connection of the utility model be used to matter and spring unit ternary vibration absorber, simple structure, it is compact-sized, be easy to
Dismounting, can be realized small middle large-tonnage damper designs.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of facing structure of ternary vibration absorber in parallel for being used to matter and spring unit of the utility model embodiment
Schematic diagram；
Fig. 2 is a kind of isometric side of ternary vibration absorber in parallel for being used to matter and spring unit of the utility model embodiment
Figure；
Fig. 3 is a kind of side view structure of ternary vibration absorber in parallel for being used to matter and spring unit of the utility model embodiment
Schematic diagram；
Fig. 4 is a kind of backsight structure of ternary vibration absorber in parallel for being used to matter and spring unit of the utility model embodiment
Schematic diagram；
Fig. 5 is a kind of plan structure of ternary vibration absorber in parallel for being used to matter and spring unit of the utility model embodiment
Schematic diagram；
Fig. 6 is that a kind of matter in parallel used of the utility model embodiment and the ternary vibration absorber of spring unit look up structure
Schematic diagram；
Fig. 7 is A-A cross-sectional view in Fig. 1；
Fig. 8 is B-B cross-sectional view in Fig. 1.
Meaning representated by serial number in figure are as follows: on 1. connecting pin, 2. first ball nuts, 3. first plectanes, 4.E sections
Core, 5. conductor plates, 6. the 4th plectanes, 7. second ball screws, 8. second outer cylinders, 9. second connectors, 10. second straight line axis
It holds, 11. linear guides, 12. first stationary magnets, 13. lower connecting pins, 14. first straight line bearings, 15. movement electromagnets,
16. the second stationary magnet, 17. second ball nuts, 18. third plectanes, 19. flywheels, 20. second plectanes, 21. first are powered
Coil, 22. first outer cylinders, 23. first ball screws, 24. first connectors, 25. first thrust bearings, 26. third thrust axis
It holds.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Embodiment one
As shown in Figures 1 to 6, the ternary vibration absorber of a kind of used matter and spring unit in parallel of the present embodiment, including bullet
It connects after spring unit, damping unit and used matter unit, the used matter unit and spring unit are in parallel with damping unit；The damping
Unit includes first ball screw system, 5, two pieces of E shaped iron cores 4 of muti-piece conductor plate and the first hot-wire coil of multiple groups 21, in this reality
The quantity of conductor plate 5 in example is applied using three pieces, and arranged in parallel, shape is circular slab, and the first hot-wire coil 21 uses
Four groups, it ball screw 23 and the first ball for being sleeved on the first ball screw 23 that the first ball screw system, which includes first,
Nut 2, first ball screw 23 pass through the first ball nut 2 and conductor plate 5 from top to bottom；The used matter unit packet
The second ball screw system and flywheel 19 are included, second ball screw system includes the second ball screw 7 and is sleeved on second
The second ball nut 17 on ball screw 7, second ball screw 7 pass through flywheel 19 and the second ball from top to bottom
Nut 17；The spring unit includes movement electromagnet 15, stationary magnet, linear bearing and linear guide 11, the straight line
Guide rail 11 passes through movement electromagnet 15, stationary magnet and linear bearing.
Further, the damping unit further includes the first outer cylinder 22, the first plectane 3 and the second plectane 20, and described first
Plectane 3 is fixed on the upper end of 22 inner wall of the first outer cylinder, and second plectane 20 is fixed on the centre of 22 inner wall of the first outer cylinder, such as schemes
Shown in 7, the center of first plectane 3 and the second plectane 20 is respectively embedded into the first thrust bearing 25 and the second thrust bearing, institute
It states the first thrust bearing 25 and the second thrust bearing is sleeved on the first ball screw 23.
Two pieces of E shaped iron cores 4 are symmetrically fixed on the inner wall of the first outer cylinder 22, and between every piece of conductor plate 5 there are
Gap；Every piece of E shaped iron core 4 winds two group of first hot-wire coil 21, and the current direction of adjacent first hot-wire coil 21 is on the contrary, magnetic pole phase
Instead, the central axes of first hot-wire coil 21 are perpendicular to the first ball screw 23.Preferably, first hot-wire coil
21 and conductor plate 5 be made of excellent conductive material, such as electrician's red copper.
First ball screw 23 passes through the first ball nut 2, the first thrust bearing 25, conductor plate from top to bottom
5 and second thrust bearing, and first ball screw 23 respectively with the first thrust bearing 25, conductor plate 5 and the second thrust axis
It holds and is connected as one, first ball nut 2 is fixedly connected with the lower end of the first connector 24, and first connector 24 is
Hollow cylinder, guarantees the stroke and normal work of the first ball screw 23, and the upper end of first connector 24 is equipped with upper company
Connect end 1.
The used matter unit further includes third plectane 18 and the 4th plectane 6, and the third plectane 18 is fixed on the first outer cylinder
The lower end of 22 inner walls, the 4th plectane 6 are fixed between the second plectane 20 and third plectane 18；As shown in figure 8, the third
The center of plectane 18 and the 4th plectane 6 is respectively embedded into third thrust bearing 26 and the 4th thrust bearing, the third thrust bearing
26 and the 4th thrust bearing be sleeved on the second ball screw 7, second ball screw 7 passes through the 4th from top to bottom
Thrust bearing, flywheel 19, third thrust bearing 26 and the second ball nut 17, and second ball screw 7 is respectively with the 4th
Thrust bearing, flywheel 19 and third thrust bearing 26 are connected as one；Second ball nut 17 is upper with the second connector 9
End is fixedly connected, and second connector 9 is hollow cylinder, guarantees the stroke and normal work of the second ball screw 7.
The spring unit further includes the second outer cylinder 8, and the upper end of second outer cylinder 8 is fixedly connected with third plectane 18；
The linear bearing includes first straight line bearing 14 and second straight line bearing 10, and the stationary magnet includes the first Motionless electromagnetic
Body 12 and the second stationary magnet 16, the first straight line bearing 14, second straight line bearing 10, the first stationary magnet 12 and
Two stationary magnets 16 are each attached to the inner wall of the second outer cylinder 8, and in the first stationary magnet 12, the second stationary magnet 16
There are gaps between heart hole and linear guide 11；The linear guide 11 passes through second straight line bearing 10, from top to bottom
Two stationary magnets 16, movement electromagnet 15, the first stationary magnet 12 and first straight line bearing 14；The linear guide 11
Upper end is fixedly connected with the second connector 9, and lower end is equipped with lower connecting pin 13；Second ball nut 17 and the second connector 9
It is arranged at the inside of the second outer cylinder 8.The movement electromagnet 15, the first stationary magnet 12 and the second stationary magnet 16
Inside winds the second hot-wire coil；Second hot-wire coil of first stationary magnet 12 and the second stationary magnet 16
Current direction is identical, and magnetic pole is identical, while it is opposite with the magnetic pole of adjacent stationary magnet respectively to move 15 both ends magnetic pole of electromagnet.
The central axes of first ball screw 23, the second ball screw 7 and linear guide 11 are located at same straight line, described
There are gaps between first ball screw 23 and the second ball screw 7.
The working principle of the present embodiment is as follows:
When the upper connecting pin 1 of used matter in parallel and the ternary vibration absorber of spring unit, lower connecting pin 13 are respectively and in structure
There are two nodes of relative displacement to be connected in portion, the relative axial movement between the tie point of ternary vibration absorber both ends, and part turns
The linear reciprocating motion of movement electromagnet 15 and the high speed rotary motion of flywheel 19 are turned to, remaining is converted into the high speed of conductor plate 5
Rotary motion.The rotator inertia square and conductor plate that the high speed rotary motion of flywheel 19 and conductor plate 5 generates cut the first live wire
The eddy-current damping torque for enclosing the generation of 21 magnetic lines of force is further amplified through ball-screw-transmission system is respectively formed axial inertia force
With eddy-current damping power.Stationary magnet and movement electromagnet 15 between mangneto active force formed elastic force, generate positive rigidity or
Negative stiffness effects.
It include following design based on a kind of design method of above-mentioned ternary vibration absorber in parallel for being used to matter and spring unit
Step:
Step 101, used matter in parallel and spring unit are determined according to Practical Project parameter and parameter optimization of viscous damper result
Inertia mass m needed for ternary vibration absorberaWith frequency f；
Step 102, determine that the model and parameter of ball screw system, parameter include ball according to step 101 calculated result
Screw rod diameter, lead and inverse transmission efficiency (generally 0.9 or so)；
Step 103, damping unit designs: determining suitable E shaped iron core size, the first hot-wire coil diameter deWith twine
Around the number of turns n and conductor plate internal diameter dc, outer diameter Dc, thickness δ and conductivityσcu(generally 5.8 × 107s/m)；Then according to public affairs
FormulaWith c=σ δ sBz 2Main magnetic induction density B is calculatedz, using COMSOL Multiphysics software emulation meter
It calculates, obtains suitable input current intensity (amplitude Ae)；Wherein, CeEquivalent damping coefficient and the damping of damper are respectively indicated with C
Coefficient, σ indicate the conductivity of conductor plate, and δ indicates that conductor plate thickness, s indicate E shaped iron core in the plane projection face of conductor plate surface
Product, BzIndicate the main magnetic induction intensity at conductor plate, LdThe lead and first ball screw of the first ball screw are respectively indicated with η
The inverse transmission efficiency of system；
Step 104, it is used to the design of matter unit: according to formulaObtain the rotary inertia J of flywheelw, Jin Ertong
Cross formulaIt calculates and determines suitable flywheel mass m and radius R, and then determine suitable thickness t, wherein maIt indicates to fly
The inertia mass of wheel, Ld' with η ' respectively indicate the lead of the second ball screw and the inverse transmission efficiency of the second ball screw system,
JwIndicate the rotary inertia of flywheel；
Step 105, spring unit designs: damper frequency f is determined according to engineering is practical, according to formula
Calculate damper stiffness design value k, wherein f indicates damper frequency, and k indicates damper stiffness design value, maIndicate flywheel
Inertia mass；Then suitable stationary magnet and movement electromagnet model and parameter are determined, by gradually adjusting electromagnet the
Current strength (amplitude A in two hot-wire coilss), the distance between direction and stationary magnet dsReach target rigidity Design
Value；
Step 106, it according to damping unit, the design parameter of used matter unit and spring unit, determines outside ternary vibration absorber
The design parameter of cylinder, thrust bearing and plectane mainly includes outer cylinder internal diameter do, thickness to, length lo；The internal diameter d of plectanei, outer diameter
Di, thickness hi；Thrust bearing internal diameter dbDeng.
It include following step based on a kind of assembly method of above-mentioned ternary vibration absorber in parallel for being used to matter and spring unit
It is rapid:
Step 201, the first ball nut 2 and the second ball nut 17 are set in the first ball screw 23 and second
The threaded portion of ball screw 7；
Step 202, the first thrust bearing 25, the second thrust bearing, third thrust bearing 26 and the 4th thrust bearing difference
Insertion is fastened in the centre bore of the first plectane 3, the second plectane 20, third plectane 18 and the 4th plectane 6；
Step 203, the first thrust bearing 25, muti-piece conductor plate 5 and the second thrust bearing are sequentially sleeved on from top to bottom
The light circle region of first ball screw 23；By the 4th thrust bearing, flywheel 19 and third thrust bearing 26, sequence covers from top to bottom
Mounted in the light circle region of the second ball screw 7；
Step 204, the first hot-wire coil 21 is wound on E shaped iron core 4, and the side of E shaped iron core 4 is bolted on
The inside of first plectane 3 and the second plectane 20；
Step 205, step 203 and step 204 mounting structure be embedded into the inside of the first outer cylinder 22, and by E shaped iron core 4
It is fixed on the inner wall of the first outer cylinder 22, the first plectane 3, the second plectane 20, third plectane 18 and the 4th plectane 6 pass through bolt and the
The inner wall of one outer cylinder 22 is fixedly connected；
Step 206, in the middle part of linear guide 11 suit movement electromagnet 15, linear guide 11 is sequentially set with the from top
Two stationary magnets 16 and second straight line bearing 10 are sequentially set with the first stationary magnet 12 and first straight line bearing from lower part
14；
Step 207, the both ends of the second connector 9 are separately connected the second ball nut 17 and linear guide 11；
Step 208, step 207 mounting structure is embedded into the inside of the second outer cylinder 8, and by first straight line bearing 14,
Two linear bearings 10, the first stationary magnet 12 and the second stationary magnet 16 are each attached to the inner wall of the second outer cylinder 8；
Step 209, third plectane 18 and the assembly of the second outer cylinder 8 are integrated by bolt, the first connector 24 and first
Ball nut 2 is connected as entirety.
Embodiment two, this gives the design methods that the ternary vibration absorber of matter and spring unit is used in a parallel connection
Calculated examples, specifically:
Yueyang Dongting Lake Bridge is to be located at Dongting Lake and the Changjiang river interface, is an especially big highway for connecting Yueyang and Huarong
Bridge, overall length 5747.82m.Full-bridge arranges 222 drag-lines altogether, after tested Yueyang side tower downstream A11 cable force be 3095N, one
Rank modal frequency is 1.11Hz, rope long 114.72m, unit mass 51.8kg/m.
Using A11 rope as damping object, the ternary vibration absorber for carrying out used matter in parallel and spring unit for first-order modal is excellent
Change design: suspension cable-ternary vibration absorber coupled system fining analysis model being established based on finite difference calculus, using dragon
Ge-Ku Ta method solves free vibration and forced vibration response of the suspension cable under sinusoidal excitation, and recognizes suspension cable acquisition
Additional damping ratios.By continuing to optimize the inertia mass ratio, frequency ratio and damping ratio of ternary vibration absorber, it is suitable for
The Optimal Parameters of the ternary vibration absorber of suspension cable vibration damping: mass ratio (damper inertia mass/drag-line quality) is 0.3, frequency
It is 0.07 than (damper frequency/drag-line fundamental frequency), the Equivalent damping coefficient of damper is 86.221N/ (m/s), installation position
Set anchored end 2.294m under suspension cable (2%l, l are that rope is long).
Step 301, damping in parallel and spring unit are determined according to Practical Project parameter and parameter optimization of viscous damper result
Inertia mass m needed for ternary vibration absorbera=1782.749Kg and frequency f=0.077Hz；
Step 302, determine that the model and parameter of ball screw system, parameter include ball according to step 301 calculated result
Screw rod diameter 20mm, lead 10mm and inverse transmission efficiency 0.9, first ball screw system are identical as the second ball screw system；
Step 303, damping unit designs: determining suitable E sections core diameter 20mm, the first hot-wire coil diameter de=
2mm and winding the number of turns n=10 and conductor plate internal diameter dc=40mm, outer diameter Dc=120mm, thickness δ=3mm and conductivityσcu
=5.8 × 107s/m；Then according to formulaWith c=σ δ sBz 2Main magnetic induction density B is calculatedz=0.0033T,
Using COMSOL Multiphysics Software simulation calculation, obtaining suitable input current intensity amplitude is about Ae=0.024A；
Wherein, CeThe Equivalent damping coefficient and damped coefficient of damper are respectively indicated with C, σ indicates the conductivity of conductor plate, and δ expression is led
Body plate thickness, s indicate plane projection area of the E shaped iron core in conductor plate surface, BzIndicate the main magnetic induction intensity at conductor plate,
LdThe lead of the first ball screw and the inverse transmission efficiency of first ball screw system are respectively indicated with η；
Step 304, it is used to the design of matter unit: according to formulaObtain the rotary inertia J of flywheelw=
0.00366kg·mm2, and then pass through formulaIt calculates and determines suitable flywheel mass m=2.032kg and radius R=
60mm, and then determine suitable thickness t=23.03mm, wherein maIndicate the inertia mass of flywheel, Ld' with η ' respectively indicate second
The inverse transmission efficiency of the lead of ball screw and the second ball screw system, JwIndicate the rotary inertia of flywheel；
Step 305, spring unit designs: damper frequency f=0.077Hz is determined according to engineering is practical, according to formulaCalculate damper stiffness design value k=417N/m, wherein f indicates damper frequency, and k indicates damper stiffness
Design value, maIndicate the inertia mass of flywheel；Then suitable stationary magnet and movement electromagnet are determined according to previous experiences
Second hot-wire coil internal diameter 40mm, length 30mm, line footpath 2mm, internal second hot-wire coil multilayer is close around 200 circles, calculates electromagnetism
Current strength amplitude in the second hot-wire coil of internal portion is about As=0.72A, direction (stationary magnet and movement electromagnet electricity
Flow contrary) and the distance between stationary magnet ds=80mm reaches target rigidity Design value；
Step 306, it according to damping unit, the design parameter of used matter unit and spring unit, determines outside ternary vibration absorber
The design parameter of cylinder, thrust bearing and plectane mainly includes the first outer cylinder internal diameter do=130mm, thickness to=5mm, length lo=
300mm；The internal diameter d of all plectanesi=40mm, outer diameter Di=130mm, thickness hi=5mm；Thrust bearing internal diameter db=20mm；The
Two outer cylinder internal diameter do=40mm, thickness to=5mm, length lo=200mm.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (8)
1. a kind of ternary vibration absorber of in parallel used matter and spring unit, which is characterized in that including spring unit, damping unit and
It connects after used matter unit, the used matter unit and spring unit parallel connection with damping unit；The damping unit includes the first ball
Spindle arrangement, the first hot-wire coil of muti-piece conductor plate, two pieces of E shaped iron cores and multiple groups, the first ball screw system include the
One ball screw and the first ball nut being sleeved on the first ball screw, first ball screw are sequentially worn from top to bottom
Cross the first ball nut and conductor plate；The used matter unit includes the second ball screw system and flywheel, second ball wire
Thick stick system includes the second ball screw and the second ball nut for being sleeved on the second ball screw, second ball screw from
Flywheel and the second ball nut are passed through under；The spring unit includes movement electromagnet, stationary magnet, linear axis
It holds and linear guide, the linear guide passes through movement electromagnet, stationary magnet and linear bearing.
2. the ternary vibration absorber of used matter and spring unit in parallel according to claim 1, which is characterized in that the damping
Unit further includes the first outer cylinder, the first plectane and the second plectane, and first plectane is fixed on the upper end of the first outer tube inner wall, institute
State the centre that the second plectane is fixed on the first outer tube inner wall, the center of first plectane and the second plectane is respectively embedded into first and pushes away
Power bearing and the second thrust bearing, first thrust bearing and the second thrust bearing are sleeved on the first ball screw.
3. the ternary vibration absorber of used matter and spring unit in parallel according to claim 2, which is characterized in that described two pieces
E shaped iron core is symmetrically fixed on the inner wall of the first outer cylinder, and there are gaps between every piece of conductor plate；Every piece of E shaped iron core winding is more
The first hot-wire coil of group, the current direction of adjacent first hot-wire coil on the contrary, magnetic pole on the contrary, first hot-wire coil axis
Line is perpendicular to the first ball screw.
4. the ternary vibration absorber of used matter and spring unit in parallel according to claim 2, which is characterized in that described first
Ball screw passes through the first ball nut, the first thrust bearing, conductor plate and the second thrust bearing from top to bottom, and described
One ball nut is fixedly connected with the lower end of the first connector, and first connector is hollow cylinder, first connection
The upper end of part is equipped with upper connecting pin.
5. the ternary vibration absorber of used matter and spring unit in parallel according to claim 2, which is characterized in that the used matter
Unit further includes third plectane and the 4th plectane, and the third plectane is fixed on the lower end of the first outer tube inner wall, the 4th circle
Plate is fixed between the second plectane and third plectane；The center of the third plectane and the 4th plectane is respectively embedded into third thrust axis
It holds and is sleeved on the second ball screw with the 4th thrust bearing, the third thrust bearing and the 4th thrust bearing, described
Two ball screws pass through the 4th thrust bearing, flywheel, third thrust bearing and the second ball nut from top to bottom；Described
Two ball nuts are fixedly connected with the upper end of the second connector, and second connector is hollow cylinder.
6. the ternary vibration absorber of used matter and spring unit in parallel according to claim 5, which is characterized in that the spring
Unit further includes the second outer cylinder, and the upper end of second outer cylinder is fixedly connected with third plectane；The linear bearing includes first
Linear bearing and second straight line bearing, the stationary magnet includes the first stationary magnet and the second stationary magnet, described
First straight line bearing, second straight line bearing, the first stationary magnet and the second stationary magnet are each attached to the interior of the second outer cylinder
Wall, and there are gaps between the centre bore and linear guide of the first stationary magnet, the second stationary magnet；The linear guide
It is straight that second straight line bearing, the second stationary magnet, movement electromagnet, the first stationary magnet and first are passed through from top to bottom
Spool is held；The upper end of the linear guide is fixedly connected with the second connector, and lower end is equipped with lower connecting pin；The second ball spiral shell
Female and the second connector is arranged at the inside of the second outer cylinder.
7. the ternary vibration absorber of used matter and spring unit in parallel according to claim 6, which is characterized in that the movement
The inside of electromagnet, the first stationary magnet and the second stationary magnet winds the second hot-wire coil；Described first fixed electricity
The current direction of second hot-wire coil of magnet and the second stationary magnet is identical, and magnetic pole is identical, while moving electromagnet both ends
Magnetic pole is opposite with the magnetic pole of adjacent stationary magnet respectively.
8. the ternary vibration absorber of used matter and spring unit in parallel according to claim 1, which is characterized in that described first
The central axes of ball screw, the second ball screw and linear guide are located at same straight line, first ball screw and the second rolling
There are gaps between ballscrew.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821735517.5U CN209054009U (en) | 2018-10-25 | 2018-10-25 | The ternary vibration absorber of parallel connection used matter and spring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821735517.5U CN209054009U (en) | 2018-10-25 | 2018-10-25 | The ternary vibration absorber of parallel connection used matter and spring unit |
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| Publication Number | Publication Date |
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| CN209054009U true CN209054009U (en) | 2019-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821735517.5U Withdrawn - After Issue CN209054009U (en) | 2018-10-25 | 2018-10-25 | The ternary vibration absorber of parallel connection used matter and spring unit |
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| Country | Link |
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| CN (1) | CN209054009U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163046A (en) * | 2018-10-25 | 2019-01-08 | 华北水利水电大学 | Ternary vibration absorber, design and the assembly method of parallel connection used matter and spring unit |
| CN111722162A (en) * | 2020-07-15 | 2020-09-29 | 中国民航大学 | Magnetic field testing device for polar coordinate type magnetorheological damper |
| CN111992808A (en) * | 2020-07-05 | 2020-11-27 | 黄朋飞 | Sliding damping mechanism for main shaft box of small circular saw |
-
2018
- 2018-10-25 CN CN201821735517.5U patent/CN209054009U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163046A (en) * | 2018-10-25 | 2019-01-08 | 华北水利水电大学 | Ternary vibration absorber, design and the assembly method of parallel connection used matter and spring unit |
| CN111992808A (en) * | 2020-07-05 | 2020-11-27 | 黄朋飞 | Sliding damping mechanism for main shaft box of small circular saw |
| CN111992808B (en) * | 2020-07-05 | 2022-03-29 | 黄朋飞 | Sliding damping mechanism for main shaft box of small circular saw |
| CN111722162A (en) * | 2020-07-15 | 2020-09-29 | 中国民航大学 | Magnetic field testing device for polar coordinate type magnetorheological damper |
| CN111722162B (en) * | 2020-07-15 | 2022-09-02 | 中国民航大学 | Magnetic field testing device for polar coordinate type magnetorheological damper |
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