CN103161125B - Pod rain-line type damper suitable for stay cable - Google Patents
Pod rain-line type damper suitable for stay cable Download PDFInfo
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- CN103161125B CN103161125B CN201310072762.8A CN201310072762A CN103161125B CN 103161125 B CN103161125 B CN 103161125B CN 201310072762 A CN201310072762 A CN 201310072762A CN 103161125 B CN103161125 B CN 103161125B
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- rain
- damper
- beanpod
- stay cable
- suspension cable
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Abstract
The invention discloses a pod rain-line type damper suitable for a stay cable. The damper is wound on a stay cable tightly and closely and comprises a protective sleeve, a metal woven layer, cabin partition boards and particles enclosed in cabins. A rope-type cavity is formed by the metal woven layer. The cabin partition boards divide the cavity into a plurality of small cabins, and particles with different particle diameters are evenly distributed in each small cabin. The protective sleeve is coated outside the entire rope-type cavity. The pod rain-line type damper suitable for the stay cable has the advantages that vibration energy of the stay cable can be consumed through the forms such as motions of the particles in the pod rain-line type damper, collisions and frictions between the particles and collisions and frictions between the particles and cabin walls, so that the aim of vibration attenuation of the stay cable is achieved. Due to the fact that the pod rain-line type damper is wound on the stay cable tightly and closely, the aim of damaging of rain lines on the stay cable is achieved. Wind and rain vibrations of the stay cable can be reduced effectively. At the same time, internal damping of the stay cable is increased, so that vibrations in other forms are reduced.
Description
Technical field
The present invention relates to bridge system technical field, particularly a kind of beanpod rain line style damper being applicable to suspension cable.
Background technology
Along with the increase across footpath, large span stayed-cable bridge is more and more soft, makes cable stayed bridge be easy to be subject to the excitation of various extraneous factor and vibrate.And suspension cable is especially because rigidity is little, quality is light, and the feature that damping is low, is easy to vibrate.And along with cable stayed bridge is across the continuous increase in footpath, drag-line is also more and more longer, and the vibration problem of drag-line also becomes increasingly conspicuous.The wind-induced vibration that suspension cable is caused by air force instability and the parametric vibration problem caused by structural interaction also become increasingly conspicuous.Wherein the rain wind induced vibration problem of drag-line is that in current known inhaul cable vibration, amplitude is maximum, the one vibration that disaster is the most serious.When drag-line generation rain wind induced vibration, the waterline that drag-line upper and lower surface respectively has a rainwater to be formed, flows downward along the drag-line tilted, and along with the vibration of drag-line is in the concussion of drag-line surface.
In order to avoid the vibration of suspension cable is to the damage of cable stayed bridge, the inhaul cable vibration method generally taked now mainly contains following three kinds: the dynamic characteristics method of the pneumatic control method of drag-line, the damping vibration attenuation method of drag-line and drag-line.The pneumatic control method of drag-line is mainly through changing the cross sectional shape of drag-line and carrying out specially treated to improve the aerodynamic characteristic of drag-line under wind and rain effect to drag-line.The damping vibration attenuation method of drag-line a kind ofly improves the oscillation damping method of stayed structure damping by additional damping device on drag-line.The dynamic characteristics method of drag-line adopts lazy halyard to be connect by different drag-lines, long rope changed into tackline, changes the dynamic characteristics of drag-line, thus control the wind-induced vibration of drag-line.
Application comparison several damper widely from present engineering, the damping value that high-damping rubber damper can provide is limited, and may not reach the damping value of optimal design requirement for low order mode; The maximum shortcoming of hydraulic damper and sticky shearing material damping device is that the temperature compliance of its performance is large, and the durability of oil consumption material neither be very satisfactory; Although frictional property damper not temperature influence easily regulates, during little amplitude, damping can not work, and may be unfavorable for the fatigue damage of drag-line, and the discrete feature of its material also can cause the instability of damping capacity fixed; MR damper is the adjustable parameter damper made with intellectual material, is that a kind of new technology has lot of advantages, but its price relatively also costly etc.
At the above damper introduced, no matter take the damper of which kind of form, capital has a common effect to be exactly that the position of damper is closer from guy anchor solid point, although the destruction that anchor point place causes because of wind-induced vibration effectively can be improved, but it is still undesirable to slowing down of amplitude in the middle part of drag-line, particularly the long rope of large span stayed-cable bridge is all the more so, therefore in the cable stayed bridge of large span, always to rely on several measure to consider, from the angle that bridge is attractive in appearance, it is also inaesthetic for installing the above damper, needs to solve in conjunction with drag-line aerodynamic Measures.
Summary of the invention
Technical problem to be solved by this invention to provide a kind of beanpod rain line style damper being applicable to suspension cable, can play the advantage of aerodynamic Measures, can improve again the damping of suspension cable.
In order to solve above technical problem; the invention provides a kind of beanpod rain line style damper being applicable to suspension cable; this damper is closely wrapped on suspension cable; the particle comprising protective sleeve, wire sheathing, cabin dividing plate and be enclosed in cabin; the rope type cavity be made up of wire sheathing; cavity is divided into several cuddies by cabin dividing plate, is dispersed with the particle of different-grain diameter in each cuddy equably, at the outside of whole rope type cavity parcel protective sleeve.
Described rope type cavity is closed circle structure, to reduce the resistance of drag-line.The material of described wire sheathing is metal hose, as stainless steel, copper etc.In order to strengthen its energy absorption performance, in metal hose, one deck abrasive rubber can be added.
The material of described cabin dividing plate is metal hose, or is elastomeric material.The number of cabin dividing plate is depending on required cabin length, and good in order to make beanpod rain line style damper effect play, cabin length is unsuitable long.And cabin dividing plate can not allow the particle in cabin pass through, and ensures the original distribution of particle.
The shape of described particle is irregular, and grain diameter also should be divided into several grade, and the quantity of particle accounts for the 50%-90% of each cuddy.
Described protective sleeve adopts wear-resisting, corrosion-resistant material.
Superior effect of the present invention is:
1) thought increasing suspension cable internal damping is adopted, the energy of inhaul cable vibration is consumed by the form such as collision and friction of the collision between the endocorpuscular motion of beanpod rain line style damper, particle and friction, particle and cabin wall, play the object of pulling cable damping, compared with existing damper, it has technology simple, the advantages such as low price;
2) the present invention is closely wrapped on drag-line, plays the object destroying drag-line rain line, effectively reduces wind-rain induced vibration and moves, increase drag-line internal damping simultaneously, decrease other forms of vibration.Compared with existing damper, be the superposition of multiple damping, and more single unlike existing damper, be conducive to saving space like this;
3) from Bridge Landscape angle, the present invention locks just as a fine rule is wrapped in, and do not have much impacts, and the impact of existing damper on Bridge Landscape is larger on bridge is attractive in appearance;
4) existing damper needs mounting bracket, limits the setting height(from bottom) of damper, reduces the effectiveness in vibration suppression of damper.The present invention does not need support, can be arranged on whole height, more favourable to the vibration damping of drag-line;
5) simple structure of the present invention, can not produce some drawbacks of existing damper, the Leakage of such as hydraulic damper, the idle problem of the little amplitude of frcition damper.
Accompanying drawing explanation
Fig. 1 is the cross-sectional drawing of beanpod rain line style damper of the present invention;
Fig. 2 is the skiagraph of beanpod rain line style damper of the present invention;
Fig. 3 is the elevation that single beanpod rain line style damper is applied on suspension cable;
Fig. 4 is the elevation that two beanpod rain line style dampers are applied on suspension cable;
Number in the figure explanation
1-protective sleeve; 2-wire sheathing;
3-cabin dividing plate; 4-particle;
5-beanpod type damper; 6-suspension cable.
Detailed description of the invention
Refer to shown in accompanying drawing, the invention will be further described.
As depicted in figs. 1 and 2; the invention provides a kind of beanpod rain line style damper being applicable to suspension cable; this damper is closely wrapped on suspension cable 6; the particle 4 comprising protective sleeve 1, wire sheathing 2, cabin dividing plate 3 and be enclosed in cabin; wire sheathing 2 forms rope type cavity; cavity is divided into several cuddies by cabin dividing plate 3, is dispersed with the particle 4 of different-grain diameter equably, wraps up protective sleeve 1 outside whole cavity in each cuddy.
Wire sheathing 2 adopts softness, the material that wear-resisting and energy-absorbing is good, and be beneficial to bending winding, can contact with suspension cable 6 closely, its diameter is unsuitable excessive, and the diameter of vibration damping suspension cable 6 is determined as required.Whole wire sheathing 2 is closed circle structures,
Cabin dividing plate 3 can adopt and wire sheathing 2, or the material consistent with elastomeric material is made, and the number of cabin dividing plate 3 is depending on required cabin length, and good in order to make beanpod rain line style damper effect play, cabin length is unsuitable long.And cabin dividing plate 3 can not allow the particle in cabin pass through, and ensures the original distribution of particle.
Cabin endoparticle 4 needs to adopt irregular particle shape, amounts of particles accounts for the 50%-90% of each cuddy, if when known drag-line has the significant vibration shape, can allow particle uneven distribution in whole system, that is can need put a little particle in the cuddy near the vibration shape peak value controlled more.The distribution proportion of grain diameter is considered according to the characteristic of inhaul cable vibration, the particle of different-grain diameter can make movement of particles to ensure under difference vibration, playing energy dissipating effect, being unlikely to harden to make the particle in cabin ensure dispersion, some desiccant can be mixed in the middle of particle.The material of particle should be wear-resisting, that density is large, roughness is large material, such as tungsten carbide, iron filings, steel ball etc.
Outermost protective sleeve 1 is mainly in order to protect beanpod rain line style damper the problems such as burn into is aging can not occur, and its material requirements is soft, wear-resisting, corrosion-resistant, ageing-resistant.Can select the material that PE flexible pipe, HDPE flexible pipe etc. are identical with suspension cable sheath, this also can ensure that beanpod rain line style damper is firm when mounted and convenient.
The diameter of beanpod rain line style damper is selected to determine according to the diameter of suspension cable 6, after determining beanpod rain line style damper diameter, determine the thickness of each deck, principle makes the diameter of cavity larger as far as possible, be conducive to like this storing more particle 4, damping is significantly good.
As shown in Figure 3; it is the suspension cable 6 that a beanpod rain line style damper 5 and need vibration damping; beanpod rain line style damper 5 is wrapped on whole skew cables 6 by glue special by a constant pitch; when there is vibration in suspension cable 6; particle in beanpod rain line style damper 5 can move thereupon, and the motion etc. of the collision between particle and particle, the friction between particle and main system and the quality of device own can consume the energy of inhaul cable vibration.When Sometimes When It Rains, because beanpod rain line style damper 5 is spirally wound on suspension cable 6, make suspension cable 6 can not form waterline, destroy the condition producing rain wind induced vibration thus, avoid the unfavorable vibration under this situation.
When a beanpod type damper can not meet the requirement of vibration damping, two identical beanpod rain line style dampers 5 also can be installed on same skew cables 6.As shown in Figure 4, comprise two identical beanpod rain line style dampers 5, also have the suspension cable 6 that to be damped, when working mechanism is as installed single damper.Specific practice allows two beanpod rain line style damper 5 initial positions differ 180 ° be wrapped on whole skew cables 6 by a constant pitch by glue special by identical direction and pitch.
Claims (7)
1. one kind is applicable to the beanpod rain line style damper of suspension cable; it is characterized in that: this damper is closely wrapped on suspension cable by a constant pitch; the particle comprising protective sleeve, wire sheathing, cabin dividing plate and be enclosed in cabin; the rope type cavity be made up of wire sheathing; cavity is divided into several cuddies by cabin dividing plate; the particle of different-grain diameter is dispersed with equably, at the outside of whole rope type cavity parcel protective sleeve in each cuddy.
2. the beanpod rain line style damper being applicable to suspension cable according to claim 1, is characterized in that: described rope type cavity is closed circle structure.
3. the beanpod rain line style damper being applicable to suspension cable according to claim 1, is characterized in that: the material of described wire sheathing is metal hose.
4. the beanpod rain line style damper being applicable to suspension cable according to claim 3, is characterized in that: add one deck abrasive rubber in described metal hose.
5. the beanpod rain line style damper being applicable to suspension cable according to claim 1, is characterized in that: the material of described cabin dividing plate is metal hose, or is elastomeric material.
6. the beanpod rain line style damper being applicable to suspension cable according to claim 1, is characterized in that: the shape of described particle is irregular, and the quantity of particle accounts for the 50%-90% of each cuddy.
7. the beanpod rain line style damper being applicable to suspension cable according to claim 1, is characterized in that: described protective sleeve adopts wear-resisting, corrosion-resistant material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072762.8A CN103161125B (en) | 2013-03-07 | 2013-03-07 | Pod rain-line type damper suitable for stay cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072762.8A CN103161125B (en) | 2013-03-07 | 2013-03-07 | Pod rain-line type damper suitable for stay cable |
Publications (2)
| Publication Number | Publication Date |
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| CN103161125A CN103161125A (en) | 2013-06-19 |
| CN103161125B true CN103161125B (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310072762.8A Active CN103161125B (en) | 2013-03-07 | 2013-03-07 | Pod rain-line type damper suitable for stay cable |
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| CN (1) | CN103161125B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106129945B (en) * | 2016-08-30 | 2018-11-16 | 广东电网有限责任公司电力科学研究院 | A kind of damper |
| CN107905604A (en) * | 2017-08-14 | 2018-04-13 | 同济大学 | The ground brick granule damper suppressed suitable for skyscraper horizontal vibration |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4620059A (en) * | 1985-12-03 | 1986-10-28 | Preformed Line Products Company | Cable vibration dampener and method of installing |
| JPH0571104A (en) * | 1991-04-10 | 1993-03-23 | Nippon Mentetsuku Kk | Overcoat protective tube of laid cable |
| US6292967B1 (en) * | 1999-09-14 | 2001-09-25 | Construction Technology Laboratories, Inc. | TMD-damped stay cable and method and TMD |
| CN2555278Y (en) * | 2002-07-08 | 2003-06-11 | 中铁大桥局集团第一工程有限公司郑州缆索厂 | Windproof and rainproof and shockproof standing rope |
| CN201447664U (en) * | 2009-07-03 | 2010-05-05 | 江苏法尔胜新日制铁缆索有限公司 | Novel compound wind/rain excitation resisting stayed cable |
| CN203160129U (en) * | 2013-03-07 | 2013-08-28 | 同济大学 | Leguminous rain-line damper applicable to stay cable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2725701A (en) * | 1999-12-16 | 2001-06-25 | Texas Tech University | Distributed aerodynamic and mechanical damping of cables with active smart control |
-
2013
- 2013-03-07 CN CN201310072762.8A patent/CN103161125B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4620059A (en) * | 1985-12-03 | 1986-10-28 | Preformed Line Products Company | Cable vibration dampener and method of installing |
| JPH0571104A (en) * | 1991-04-10 | 1993-03-23 | Nippon Mentetsuku Kk | Overcoat protective tube of laid cable |
| US6292967B1 (en) * | 1999-09-14 | 2001-09-25 | Construction Technology Laboratories, Inc. | TMD-damped stay cable and method and TMD |
| CN2555278Y (en) * | 2002-07-08 | 2003-06-11 | 中铁大桥局集团第一工程有限公司郑州缆索厂 | Windproof and rainproof and shockproof standing rope |
| CN201447664U (en) * | 2009-07-03 | 2010-05-05 | 江苏法尔胜新日制铁缆索有限公司 | Novel compound wind/rain excitation resisting stayed cable |
| CN203160129U (en) * | 2013-03-07 | 2013-08-28 | 同济大学 | Leguminous rain-line damper applicable to stay cable |
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| CN103161125A (en) | 2013-06-19 |
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