CN112878177B - Sleeve type vibration control device for suspension bridge sling - Google Patents
Sleeve type vibration control device for suspension bridge sling Download PDFInfo
- Publication number
- CN112878177B CN112878177B CN202110152318.1A CN202110152318A CN112878177B CN 112878177 B CN112878177 B CN 112878177B CN 202110152318 A CN202110152318 A CN 202110152318A CN 112878177 B CN112878177 B CN 112878177B
- Authority
- CN
- China
- Prior art keywords
- outer sleeve
- inner sleeve
- sleeve
- sling
- conductor plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a sleeve type vibration control device of a suspension bridge sling, which comprises an inner sleeve, an outer sleeve, damping fillers, a connecting plate and a conductor plate, wherein the inner sleeve is arranged on the inner sleeve; the inner sleeve is sleeved outside the sling, damping filler is arranged between the sling and the inner sleeve, the outer sleeve is sleeved outside the inner sleeve, a connecting plate and a conductor plate are arranged between the inner sleeve and the outer sleeve, two ends of the connecting plate are fixedly connected with the inner sleeve and the outer sleeve respectively, the conductor plate is arranged on the inner sleeve, a conductor plate accommodating opening is formed in the side wall of the outer sleeve along the axial direction, a magnetic field is arranged between two side walls of the conductor plate accommodating opening parallel to the axis of the outer sleeve, and the conductor plate can penetrate through the conductor plate accommodating opening and cut the magnetic field. The device can effectually eliminate the vibration of hoist cable, guarantees bridge safety.
Description
Technical Field
The invention relates to a suspension bridge vibration control device, in particular to a sleeve type vibration control device for suspension bridge slings.
Background
The large span bridge is extremely susceptible to wind, earthquake, traffic load and other factors to generate remarkable vibration due to the characteristics of stress and geometry. The amplitude of such vibrations can threaten the safe operation of the bridge to a certain extent. The relevant data indicate that wind-induced vibrations since 1918 have caused at least 11 suspension bridges in the world to collapse. The suspension bridge has small lateral rigidity, small damping, small beam rigidity and large sling slenderness ratio, so wind-induced flutter, buffeting and vortex vibration are easy to generate, resonance is easy to generate when the structural frequency is similar to the wind load frequency, and the interaction between the sling and the beam is further enhanced, thereby causing structural damage. In order to restrain and reduce the vibration, besides taking reasonable parameters in structural design, another common measure is to use a structural vibration control technology, wherein the passive control technology is widely studied and applied to bridge structures at home and abroad. However, the existing passive bridge control system has the following problems:
there are three general control methods of aerodynamic measures, structural measures and additional dampers in terms of sling damping. The aerodynamic measures are only suitable for damping single-factor slings with known vibration mechanisms, and are not suitable for wind vibration under the condition of unclear vibration mechanisms and multi-factor coupling; the method of adding auxiliary ropes and separators in the suspender is adopted, the construction is convenient, but the engineering appearance is affected, and the self-vibration frequency of the suspender is only changed, the energy consumption is not achieved, and the vibration energy is transmitted to the beam; the damper can dissipate a part of vibration energy, but the mounting position of the sling is limited because the sling is generally long, the negative damping is large when the sling starts vibrating, the delay effect is obvious, and the effectiveness of the damper is greatly reduced. In the past, most of the dampers arranged on the sling are viscous dampers and are arranged separately from the sling, so that the dampers are easy to fail due to climate influence, and the appearance is complex, so that the appearance is influenced.
The conventional TMD device with the mass block is generally automatically started when the structure vibrates, and because the suspension cable structure is low in overall rigidity and large in deformation, time delay starting is often caused, so that a phase difference is generated between the vibration of an actual control system and a design value, an effect is poor, and even a reaction is caused under the condition of complex vibration mode, so that the TMD device is not suitable for a sling structure.
Most of other vibration damping devices are exposed and are easily affected by the environment, so that the reliability and durability of the system are reduced.
Disclosure of Invention
The invention provides a sleeve type vibration control device for a suspension bridge sling, which solves the problems that the existing vibration damping device is poor in vibration damping effect, difficult to maintain due to external equipment, complex in structure, elegant in appearance and the like when being used for the sling.
The invention adopts the following technical means:
a sleeve type vibration control device of a suspension bridge sling comprises an inner sleeve, an outer sleeve, damping fillers, a connecting plate and a conductor plate;
the inner sleeve is sleeved outside the sling, damping filler is arranged between the sling and the inner sleeve, the outer sleeve is sleeved outside the inner sleeve, a vibration gap is formed between the outer sleeve and the inner sleeve, a connecting plate and a conductor plate are arranged between the inner sleeve and the outer sleeve, two ends of the connecting plate are respectively fixedly connected with the inner sleeve and the outer sleeve, the conductor plate is arranged on the inner sleeve, a conductor plate accommodating opening is formed in the side wall of the outer sleeve along the axial direction, a magnetic field is arranged between two side walls of the conductor plate accommodating opening parallel to the axis of the outer sleeve, and the conductor plate can penetrate through the conductor plate accommodating opening and cut the magnetic field.
Further, the inner sleeve comprises a first inner sleeve, a second inner sleeve and a third inner sleeve;
the outer sleeve comprises a first outer sleeve, a second outer sleeve and a third outer sleeve;
the connecting plates comprise a first connecting plate and a second connecting plate;
the first inner sleeve is arranged at the upper end of the sling, the first outer sleeve is sleeved outside the first inner sleeve, the upper end of the first outer sleeve is fixedly connected with the main rope, and a plurality of first connecting plates are circumferentially arranged between the first outer sleeve and the first inner sleeve;
the second inner sleeve is arranged on the sling, four conductor plates are uniformly distributed and fixed on the second inner sleeve in the circumferential direction, the second outer sleeve is sleeved outside the second inner sleeve, the upper end of the second outer sleeve is fixedly connected with the lower end of the first outer sleeve, and the side wall of the second outer sleeve is provided with conductor plate accommodating ports corresponding to the conductor plates;
the third inner sleeve is arranged at the lower end of the sling, the third outer sleeve is sleeved outside the third inner sleeve, the upper end of the third outer sleeve is fixedly connected with the lower end of the second outer sleeve, the lower end of the third outer sleeve is fixedly connected with the bridge structure, and a plurality of second connecting plates are circumferentially arranged between the third outer sleeve and the third inner sleeve.
Further, the inner sleeve comprises a plurality of inner sleeve units;
the outer sleeve comprises a plurality of outer sleeve units, wherein the number of the outer sleeve units is the same as that of the inner sleeve units;
the inner sleeve units are sequentially arranged on the sling from one side of the bridge structure to one side of the main rope, and the outer sleeve units are sequentially sleeved outside the inner sleeve units from one side of the bridge structure to one side of the main rope;
two conductor plate accommodating openings are uniformly distributed on the outer wall of the outer sleeve unit,
the two conductor plates are uniformly distributed on the inner sleeve unit, two connecting plates are uniformly distributed between the outer sleeve unit and the corresponding inner sleeve unit, and the conductor plates and the connecting plates are arranged at a 90-degree interval;
the outer sleeve unit, the inner sleeve unit, the conductor plate and the connecting plate form a sleeve vibration reduction unit;
the connecting plates of two adjacent sleeve vibration reduction units are arranged at intervals of 90 degrees.
Further, the inner sleeve is hinged with the conductor plate, and the conductor plate comprises a steel plate and copper plates arranged on two side surfaces of the steel plate.
Further, the connecting plate is an elastic plate.
Further, the outer sleeve is made of permanent magnet steel or magnetic poles are arranged on two side walls of the conductor plate accommodating opening, which are parallel to the axis of the outer sleeve.
Further, the first inner sleeve, the second inner sleeve, the third inner sleeve, the first outer sleeve, the second outer sleeve and the third outer sleeve are of split structures, and connecting flanges are arranged at two ends of the first outer sleeve, the second outer sleeve and the third outer sleeve.
Further, the inner sleeve unit and the outer sleeve unit are of split structures, and connecting flanges are arranged at two ends of the outer sleeve unit.
Further, the damping filler is a plastic hose, modified asphalt or a damping rubber tube.
Compared with the prior art, the sleeve type vibration control device for the suspension bridge sling disclosed by the invention has the advantages that the sleeve type vibration control device is provided with the inner sleeve, the outer sleeve, the damping filler, the connecting plate and the conductor plate which are arranged on the sling to form a TMD (thermal mechanical shock-resistant) structure, so that the vibration of the sling can be effectively eliminated, and the purposes of reducing the vibration amplitude and the duration of the main beam and the sling are achieved.
Drawings
FIG. 1 is a block diagram of a first embodiment of a bushing vibration control device for a suspension bridge sling of the present disclosure;
FIG. 2 is a cross-sectional view at A-A in FIG. 1;
FIG. 3 is a cross-sectional view at B-B in FIG. 1;
FIG. 4 is a cross-sectional view at C-C in FIG. 1;
FIG. 5 is a block diagram of a second embodiment of a bushing vibration control device for a suspension bridge sling of the present disclosure;
FIG. 6 is a cross-sectional view taken at C-C of FIG. 5;
fig. 7 is a cross-sectional view at D-D in fig. 5.
Detailed Description
Example 1
The suspension bridge is a bridge with main ropes suspended on rope towers anchored on two sides as an upper main bearing member, and as shown in fig. 1, 2 and 3, a first embodiment of a sleeve-type vibration control device of a suspension bridge sling disclosed by the invention comprises an inner sleeve 1, an outer sleeve 2, damping fillers 3, a connecting plate 4 and a conductor plate 5;
the inner sleeve 1 is sleeved outside the sling 60, the damping filler 3 is arranged between the sling 60 and the inner sleeve 1, the outer sleeve 2 is sleeved outside the inner sleeve 1, a vibration gap 7 is formed between the outer sleeve 2 and the inner sleeve 1, the connecting plate 4 and the conductor plate 5 are arranged between the inner sleeve 1 and the outer sleeve 2, two ends of the connecting plate 4 are respectively fixedly connected with the inner sleeve 1 and the outer sleeve 2, the conductor plate 5 is arranged on the inner sleeve 1, a conductor plate accommodating opening 24 is formed in the side wall of the outer sleeve 2 along the axial direction, a magnetic field is arranged between two side walls of the conductor plate accommodating opening 24 parallel to the axis of the outer sleeve, and the conductor plate 5 can penetrate through the conductor plate accommodating opening 24 and cut the magnetic field.
Specifically, as shown in fig. 1, the main rope 61 is suspended on the towers on both sides, the main rope 61 is fixed with a connecting cuff 63, the connecting cuff 63 is fixed by a connecting cuff bolt 64, the connecting cuff 63 is fixedly connected with the sling 60 by a sling connecting bolt 65, and the lower end of the sling 60 is fixedly connected with the bridge structure 62 by an anchoring sling anchor 66. The inner sleeves comprise a first inner sleeve 11, a second inner sleeve 12 and a third inner sleeve 13;
the outer sleeve comprises a first outer sleeve 21, a second outer sleeve 22 and a third outer sleeve 23;
the connection plates include a first connection plate 40 and a second connection plate 41;
the first inner sleeve 11 is disposed at the upper end of the sling 460, the first outer sleeve 21 is sleeved outside the first inner sleeve 11, the upper end of the first outer sleeve is fixedly connected with the main rope 61, and a plurality of first connecting plates 40 are circumferentially disposed between the first outer sleeve 21 and the first inner sleeve 11;
the second inner sleeve 12 is arranged on the sling 60, four conductor plates 5 are uniformly distributed and fixed on the second inner sleeve 12 in the circumferential direction, the second outer sleeve 22 is sleeved outside the second inner sleeve 12, the upper end of the second outer sleeve is fixedly connected with the lower end of the first outer sleeve 21, and the side wall of the second outer sleeve 22 is provided with conductor plate accommodating openings 24 corresponding to the conductor plates;
the third inner sleeve 13 is disposed at the lower end of the sling 60, the third outer sleeve 23 is sleeved outside the third inner sleeve 13 and is fixedly connected with the lower end of the second outer sleeve 22, the lower end of the third outer sleeve 23 is fixedly connected with the bridge structure 62, and a plurality of second connecting plates 41 are circumferentially disposed between the third outer sleeve 23 and the third inner sleeve 13.
The working principle of the sleeve type vibration control device of the suspension bridge sling disclosed in the embodiment is as follows: when the inhaul cable vibrates under the external factors, the inhaul cable drives other components directly connected with the inhaul cable, namely the inner sleeve, the conductor plate, the corresponding connecting components (connecting plates) and the like to vibrate together, the upper end and the lower end of the system are connected with the bridge body, and the vibration mode of the system is similar to a cable structure with two fixedly connected ends. After vibration occurs, the vibration characteristics of the inhaul cable, the inner sleeve structure and the outer sleeve structure are necessarily different due to different linear density ratios and different rigidities, and the relative distance between the inner sleeve and the outer sleeve is changed in the whole vibration process. Therefore, the conductor plate directly connected with the second inner sleeve tube continuously moves in the conductor plate accommodating opening of the second outer sleeve tube, in the process, the conductor plate continuously performs cutting movement in the magnetic field, and thus, electric vortex is formed, the resistance of the electric vortex is used as counter force to prevent the relative movement, the resistance is finally transmitted to the inhaul cable per se through the conductor plate and the connecting member (connecting plate), the continuation of vibration of the inhaul cable is restrained, and meanwhile, the counter force also acts on the outer sleeve tube. The conductor plates are orthogonally arranged along the axial direction of the sling, so that vibration reduction effect can be realized for vibration of the sling in any direction; the conductor plates are arranged continuously along the axial direction, so that damping force can be generated within the length range of the whole sling, and the vibration damping process is accelerated. The main effect of the connecting plates at the upper end and the lower end of the sling is similar to a spring device, and the vibration characteristic of the sling structure shows that the vibration amplitude of the restraining section is smaller when the sling is closer to the vibrating process, so that the eddy current conductor plates do not need to be arranged at the end parts, and the connecting plates are adopted to provide connection, thereby improving the stability of the structure and reducing the complexity. Finally, the vibration amplitude of the inner sleeve and the outer sleeve is continuously attenuated along with the action of the eddy current damping force. When the vibration tends to disappear, no relative movement exists between the inner sleeve and the outer sleeve, at the moment, the conductor plate and the conductor plate accommodating opening are relatively static, the eddy current disappears, and no acting force is generated any more. The structure will actually generate three forces to suppress the influence of earthquake or wind vibration on the bridge structure: one is the eddy current damping force generated by the conductor plate; secondly, the outer sleeve generates reverse inertia force due to the difference of the self-vibration frequency of the sling; thirdly, the sling is added with a damping material pipe to increase damping force, so that a better damping effect can be obtained.
Further, the first inner sleeve 11, the second inner sleeve 12, the third inner sleeve 13, the first outer sleeve 21, the second outer sleeve 22 and the third outer sleeve 23 are of a split structure, and connecting flanges are respectively arranged at two ends of the first outer sleeve 21, the second outer sleeve 22 and the third outer sleeve 23. Specifically, the first inner sleeve is of a split structure, and comprises a plurality of circular arc-shaped first inner sleeve segments 110, 4 first inner sleeve segments 110 are shown in the figure, first connecting protrusions 111 are arranged on two sides of each first inner sleeve segment 110, through holes or threaded holes are formed in the first connecting protrusions 111, the 4 circular arc-shaped first inner sleeve segments 110 can form an integrated structure through bolts, and when the plurality of first inner sleeve segments are connected into a whole through bolts 25, the first inner sleeve can be sleeved on a sling and locked on the sling. The first outer sleeve 21 is sleeved outside the first inner sleeve 11, the two ends of the first outer sleeve 21 are provided with first outer sleeve connecting flanges 210, the connecting hoops 63 are also provided with connecting methods, the first outer sleeve and the connecting hoops are fixedly connected through the connecting flanges, in the embodiment, the first outer sleeve is also of a split structure and comprises a plurality of first outer sleeve segments 211, 4 first outer sleeve segments are arranged in the figure, two sides of each first outer sleeve segment are provided with second connecting protrusions 212, and the second connecting protrusions 212 are provided with through holes or threaded holes, so that the plurality of first outer sleeve segments can be connected into an integrated structure through bolts. A plurality of first connecting plates 40 are arranged between the first inner sleeve and the first outer sleeve, 4 first connecting plates are arranged in the figure, two ends of each first connecting plate are respectively fixed on the first inner sleeve and the first outer sleeve through connecting bolts, but screws of the first connecting plates are elliptical, so that a certain amount of displacement can be generated between the inner sleeve and the outer sleeve during vibration (the same applies to the lower 41).
As shown in fig. 4, the third inner sleeve 13 is fixed on the lower part of the sling, in this embodiment, the third inner sleeve is in a split structure, and includes a plurality of circular arc third inner sleeve segments 130, 4 in the drawing, the two sides of the third inner sleeve segments 130 are both provided with fifth connecting protrusions 131, the fifth connecting protrusions 131 are provided with through holes or threaded holes, the 4 circular arc third inner sleeve segments 130 can form an integral structure through bolts, and when the plurality of third inner sleeve segments are connected into a whole through bolts, the third inner sleeve can be sleeved on the sling and locked on the sling. The third outer sleeve 23 is sleeved outside the third inner sleeve 13, the two ends of the third outer sleeve 23 are provided with third outer sleeve connecting flanges 230, the lower end of the third outer sleeve is fixedly connected with the bridge structure through the connecting flanges, in this embodiment, the third outer sleeve 23 is also of a split structure and comprises a plurality of third outer sleeve segments 231, 4 in the drawing, the two sides of the third outer sleeve segments 231 are provided with sixth connecting protrusions 232, and the sixth connecting protrusions 232 are provided with through holes or threaded holes, so that the plurality of third outer sleeve segments can be connected into an integrated structure through bolts. A plurality of second connecting plates 41, 4 in the figure, are arranged between the third inner sleeve and the third outer sleeve, and two ends of each second connecting plate are respectively fixed on the third inner sleeve and the third outer sleeve through connecting bolts.
As shown in fig. 3, a second inner sleeve 12 is fixed on a sling between a first inner sleeve 11 and a third inner sleeve 13, the connection mode of the second inner sleeve and the sling is the same as that of the first inner sleeve or the third inner sleeve and the sling, in this embodiment, the second inner sleeve is also in a split structure, including 4 second inner sleeve segments 120, third connecting protrusions 121 are provided on two sides of the second inner sleeve segments 120, threaded holes or through holes are provided on the third connecting protrusions, the third connecting protrusions can be connected into an integral structure through connecting bolts, a second outer sleeve 22 is sleeved on the second inner sleeve 12, two ends of the second outer sleeve are provided with second outer sleeve connecting flanges 220 and are fixedly connected with a first outer sleeve connecting flange 210 and a third outer sleeve connecting flange 230 respectively, in this embodiment, the second outer sleeve is also in a split structure, including 4 second outer sleeve segments 221, fourth connecting protrusions 222 are provided on two sides of the second outer sleeve, and a conductor plate accommodating port is formed between two adjacent fourth connecting protrusions. Four conductor plates 5 are circumferentially and uniformly distributed and fixed on the second inner sleeve, a second outer sleeve 22 is sleeved on the second inner sleeve 12, the upper end of the second outer sleeve is fixedly connected with the lower end of the first outer sleeve 21, the second outer sleeve is made of permanent magnet steel segments or magnetic poles are arranged on two side walls of the conductor plate accommodating opening parallel to the axis of the outer sleeve so that a magnetic field is formed at the conductor plate accommodating opening. The inner sleeve and the outer sleeve are of split structures, and are convenient to process and install.
Further, the interior sleeve pipe with the conductor board articulates, the conductor board includes the steel sheet and sets up copper on the steel sheet both sides face, the copper is the electric conductor board, the iron plate is the magnetic conduction board, the main objective is to reduce the magnetic leakage of magnetic circuit and realize closed circuit, improve the efficiency of electric vortex damping, in this embodiment, be equipped with one-way hinge 14 between two adjacent sixth connecting protrusions, one-way hinge 14 passes through connecting bolt to be fixed on the third interior sleeve pipe and be connected with the conductor board, the conductor board can rotate certain angle in the horizontal plane through one-way hinge, through with the conductor board with interior sleeve pipe articulates for when the hoist cable vibration arouses the relative displacement between interior and exterior sleeve pipe, guarantee to freely remove at the conductor board in the scope of settlement (conductor board holds mouthful width scope), avoid the conductor board to hold the lateral wall contact of mouthful and the displacement that causes limited, influence damping effect.
Further, the connecting plate is an elastic plate, and when the sling vibrates more severely, the elastic plate can better reduce impact load born by the end part of the sling.
Further, the damping filler can be directly sleeved on the sling by adopting various plastic hoses, modified asphalt or damping rubber tubes, or can be filled by using bulk materials, and also can be of a split structure, and is connected to the inner sleeve valve, and then the inner sleeve valve and the damping filler are simultaneously installed after the sling are installed.
Example 2
A second embodiment of a sleeve vibration control device for suspension bridge slings of the present disclosure, as shown in fig. 5, 6 and 7, comprises an inner sleeve 1, an outer sleeve 2, a damping filler 3, a connection plate 4 and a conductor plate 5;
the inner sleeve 1 is sleeved outside the sling 60, the damping filler 3 is arranged between the sling 60 and the inner sleeve 1, the outer sleeve 2 is sleeved outside the inner sleeve 1, a vibration gap 7 is formed between the outer sleeve 2 and the inner sleeve 1, the connecting plate 4 and the conductor plate 5 are arranged between the inner sleeve 1 and the outer sleeve 2, two ends of the connecting plate 4 are respectively fixedly connected with the inner sleeve 1 and the outer sleeve 2, the conductor plate 5 is arranged on the inner sleeve 1, a conductor plate accommodating opening 24 is formed in the side wall of the outer sleeve 2 along the axial direction, a magnetic field is arranged between two side walls of the conductor plate accommodating opening 24 parallel to the axis of the outer sleeve, and the conductor plate 5 can penetrate through the conductor plate accommodating opening 24 and cut the magnetic field.
Specifically, the inner sleeve 1 comprises a plurality of inner sleeve units 10;
the outer sleeve 2 comprises a plurality of outer sleeve units 20 in the same number as the inner sleeve units 10;
the plurality of inner sleeve units 10 are sequentially arranged on the sling 60 from one side of the bridge structure 62 to one side of the main rope 61, and the plurality of outer sleeve units 20 are sequentially sleeved outside the inner sleeve units 10 from one side of the bridge structure 62 to one side of the main rope 61;
two conductor board accommodating ports 24 are uniformly distributed on the outer wall of the outer sleeve unit 20;
the two conductor plates 5 are uniformly distributed on the inner sleeve unit 10, two connecting plates 4 are uniformly distributed between the outer sleeve unit 20 and the corresponding inner sleeve unit 10, the conductor plates 5 and the connecting plates 4 are arranged at intervals of 90 degrees, namely, the conductor plates and the connecting plates are sequentially arranged at intervals of 90 degrees on the periphery of the inner sleeve unit;
the outer sleeve unit 20, the inner sleeve unit 10, the conductor plate 5 and the connection plate 4 form a sleeve vibration damping unit 8;
the plurality of sleeve vibration reduction units 8 are sequentially arranged on the sling 60 from one side of the bridge structure 62 to one side of the main rope 61, the sleeve vibration reduction unit at the lowest end is arranged on the bridge structure, and the upper end of the sleeve vibration reduction unit at the highest end is a free end;
the connecting plates of two adjacent sleeve vibration reduction units are arranged at intervals of 90 degrees.
The working principle of the sleeve type vibration control device of the suspension bridge sling disclosed in the embodiment is as follows: when the inhaul cable vibrates under the external factors, the inhaul cable drives other components directly connected with the inhaul cable, namely the inner sleeve, the conductor plate, the corresponding connecting components (connecting plates) and the like to vibrate together, the upper end and the lower end of the system are connected with the bridge body, and the vibration mode of the system is similar to a cable structure with two fixedly connected ends. After vibration occurs, the vibration characteristics of the inhaul cable, the inner sleeve structure and the outer sleeve structure are necessarily different due to different linear density ratios and different rigidities, and the relative distance between the inner sleeve and the outer sleeve is changed in the whole vibration process. Therefore, the conductor plate directly connected with the second inner sleeve tube continuously moves in the conductor plate accommodating opening of the second outer sleeve tube, in the process, the conductor plate continuously performs cutting movement in the magnetic field, and thus, electric vortex is formed, the resistance of the electric vortex is used as counter force to prevent the relative movement, the resistance is finally transmitted to the inhaul cable per se through the conductor plate and the connecting member (connecting plate), the continuation of vibration of the inhaul cable is restrained, and meanwhile, the counter force also acts on the outer sleeve tube. The conductor plates are orthogonally arranged along the axial direction of the sling, so that vibration reduction effect can be realized for vibration of the sling in any direction; the conductor plates are arranged continuously along the axial direction, so that damping force can be generated within the length range of the whole sling, and the vibration damping process is accelerated. The main effect of the connecting plates at the upper end and the lower end of the sling is similar to a spring device, and the vibration characteristic of the sling structure shows that the vibration amplitude of the restraining section is smaller when the sling is closer to the vibrating process, so that the eddy current conductor plates do not need to be arranged at the end parts, and the connecting plates are adopted to provide connection, thereby improving the stability of the structure and reducing the complexity. Finally, the vibration amplitude of the inner sleeve and the outer sleeve is continuously attenuated along with the action of the eddy current damping force. When the vibration tends to disappear, no relative movement exists between the inner sleeve and the outer sleeve, at the moment, the conductor plate and the conductor plate accommodating opening are relatively static, the eddy current disappears, and no acting force is generated any more. The integral vibration reduction principle of the embodiment 2 is the same as that of the embodiment 1, and the bidirectional vibration control of the sling can be realized, and the design method ensures that all sleeve forms are the same, so that the sleeve forms have lower complexity in production and installation (the sleeve with two sections is the same and can be rotated by 90 degrees in installation).
Further, the inner sleeve unit 10 and the outer sleeve unit 20 are of a split structure, and connecting flanges are arranged at two ends of the outer sleeve unit. Specifically, the main rope 61 is suspended on the rope towers on both sides, a plurality of connecting hoops 63 are fixed on the main rope 61, the connecting hoops 63 are fixedly connected with the slings 60, and the lower ends of the slings 60 are fixedly connected with the bridge structure 62 through anchor sling anchor ingots 64. A plurality of sleeve vibration reduction units 8 are sequentially fixed on the sling from one end close to the bridge structure upwards, in the embodiment, the inner sleeve units are of split structures and comprise four inner sleeve segments 11, first connecting protrusions 110 are arranged on two sides of each inner sleeve segment 11, through holes or threaded holes are formed in the first connecting protrusions 110, the inner sleeve segments can be connected into an integrated structure through connecting bolts 9, and when the inner sleeve segments are connected into a whole through the connecting bolts, the inner sleeve units can be sleeved on the sling and locked on the sling. The outer sleeve unit 20 is sleeved on the inner sleeve unit 10, the two ends of the outer sleeve unit 20 are provided with connecting flanges 200, in this embodiment, the outer sleeve unit 20 is also of a split structure, and comprises four outer sleeve segments 201, two sides of the outer sleeve segments 201 are provided with second connecting protrusions 202, threaded holes or through holes are formed in the second connecting protrusions 202, a plurality of outer sleeve segments can be connected into an integrated structure through the connecting bolts, two opposite conductor plate accommodating openings 24 are formed in the side wall of the outer sleeve unit, namely, the two conductor plate accommodating openings 24 are arranged on the side wall of the outer sleeve at intervals of 180 degrees, the extending direction of the conductor plate accommodating openings 24 is identical to the axial direction of the outer sleeve, two conductor plates are fixed on the inner sleeve unit, in this embodiment, the conductor plates are arranged between the two inner sleeve segments, and the other ends of the conductor plates can be inserted into the conductor plate accommodating openings 24. Two connecting plates are fixed on the inner sleeve unit at positions which are spaced by 90 degrees from the conductor plates, the other ends of the connecting plates are fixedly connected with the outer sleeve, in the embodiment, one ends of the connecting plates are arranged between the two inner sleeve segments and are fixedly connected with the first connecting protrusions through connecting bolts, and the other ends of the connecting plates are arranged between the two outer sleeve segments and are fixedly connected with the second connecting protrusions through connecting bolts. The inner sleeve unit and the outer sleeve unit are of split structures, and are convenient to process and install.
Further, interior sleeve pipe unit with the conductor board articulates, the conductor board includes the steel sheet and sets up copper on the steel sheet both sides face, and the copper is the electric conductor board, and the iron plate is the magnetic conduction board, and the main objective is in order to reduce the magnetic leakage of magnetic circuit and realize closed circuit, improves the efficiency of electric vortex damping, in this embodiment, is connected through one-way hinge 12 with the conductor board between the first connection arch 101 of interior sleeve pipe unit, through with the conductor board with interior sleeve pipe unit articulates for when the hoist cable vibration arouses the relative displacement between interior outer sleeve pipe, guarantee at the conductor board in the within range of settlement (conductor board holds mouthful width scope) free movement, avoid the conductor board to hold the lateral wall contact of mouthful and the displacement that causes limited, influence damping effect with the conductor board.
Further, the connecting plate is an elastic plate, and when the sling vibrates more severely, the elastic plate can better reduce impact load born by the end part of the sling.
Further, the damping filler can be directly sleeved on the sling by adopting various plastic hoses, modified asphalt or damping rubber tubes, or can be filled by using bulk materials, and also can be of a split structure, and is connected to the inner sleeve valve, and then the inner sleeve valve and the damping filler are simultaneously installed after the sling are installed.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. A telescopic vibration control device for a suspension bridge sling, characterized by: comprises an inner sleeve (1), an outer sleeve (2), damping filler (3), a connecting plate (4) and a conductor plate (5);
the inner sleeve (1) is sleeved outside the sling (60), damping filler (3) is arranged between the sling (60) and the inner sleeve (1), the outer sleeve (2) is sleeved outside the inner sleeve (1), the lower end of the outer sleeve (2) is arranged on a bridge structure (62) and forms a vibration gap (7) between the outer sleeve (2) and the inner sleeve (1), a connecting plate (4) and a conductor plate (5) are arranged between the inner sleeve (1) and the outer sleeve (2), two ends of the connecting plate (4) are respectively fixedly connected with the inner sleeve (1) and the outer sleeve (2), the conductor plate (5) is arranged on the inner sleeve (1), a conductor plate accommodating opening (24) is formed in the side wall of the outer sleeve (2) along the axial direction, a magnetic field is arranged between two side walls of the conductor plate accommodating opening (24) parallel to the outer sleeve axis, the inner sleeve (60), the inner sleeve (1) and the outer sleeve (2) are different in linear density proportion and rigidity, and are driven by the sling (60), and the vibration of the outer sleeve (1) and the conductor plate (5) are driven by the outer sleeve (1), so that the conductor plate (5) can pass through the conductor plate receiving opening (24) and cut the magnetic field.
2. The telescopic vibration control device of a suspension bridge sling as defined in claim 1, wherein:
the inner sleeve (1) comprises a first inner sleeve (11), a second inner sleeve (12) and a third inner sleeve (13);
the outer sleeve (2) comprises a first outer sleeve (21), a second outer sleeve (22) and a third outer sleeve (23);
the connecting plate (4) comprises a first connecting plate (40) and a second connecting plate (41);
the first inner sleeve (11) is arranged at the upper end of the sling (60), the first outer sleeve (21) is sleeved outside the first inner sleeve (11) and the upper end of the first outer sleeve is fixedly connected with the main rope (61), and a plurality of first connecting plates (40) are circumferentially arranged between the first outer sleeve (21) and the first inner sleeve (11);
the second inner sleeve (12) is arranged on the sling (60), four conductor plates (5) are uniformly distributed and fixed on the second inner sleeve (12) in the circumferential direction, the second outer sleeve (22) is sleeved outside the second inner sleeve (12) and the upper end of the second outer sleeve is fixedly connected with the lower end of the first outer sleeve (21), and the side wall of the second outer sleeve (22) is provided with a conductor plate accommodating port (24) corresponding to the conductor plate;
the third inner sleeve (13) is arranged at the lower end of the sling (60), the third outer sleeve (23) is sleeved outside the third inner sleeve (13) and fixedly connected with the lower end of the second outer sleeve (22), the lower end of the third outer sleeve (23) is fixedly connected with the bridge structure (62), and a plurality of second connecting plates (41) are circumferentially arranged between the third outer sleeve (23) and the third inner sleeve (13).
3. The telescopic vibration control device of a suspension bridge sling as defined in claim 1, wherein:
the inner sleeve comprises a plurality of inner sleeve units;
the outer sleeve comprises a plurality of outer sleeve units, wherein the number of the outer sleeve units is the same as that of the inner sleeve units;
the inner sleeve units are sequentially arranged on the sling from one side of the bridge structure to one side of the main rope, and the outer sleeve units are sequentially sleeved outside the inner sleeve units from one side of the bridge structure to one side of the main rope;
two conductor plate accommodating ports are uniformly distributed on the outer wall of the outer sleeve unit;
the two conductor plates are uniformly distributed on the inner sleeve unit, two connecting plates are uniformly distributed between the outer sleeve unit and the corresponding inner sleeve unit, and the conductor plates and the connecting plates are arranged at a 90-degree interval;
the outer sleeve unit, the inner sleeve unit, the conductor plate and the connecting plate form a sleeve vibration reduction unit;
the connecting plates of two adjacent sleeve vibration reduction units are arranged at intervals of 90 degrees.
4. A telescopic vibration control device for a suspension bridge sling according to claim 2 or 3, characterised in that: the inner sleeve is hinged with the conductor plate, and the conductor plate comprises a steel plate and copper plates arranged on two side surfaces of the steel plate.
5. The telescopic vibration control device of a suspension bridge sling as defined in claim 1, wherein: the connecting plate is an elastic plate.
6. The telescopic vibration control device of a suspension bridge sling as defined in claim 1, wherein: the outer sleeve is made of permanent magnet steel or two side walls of the conductor plate accommodating opening, which are parallel to the axis of the outer sleeve, are provided with magnetic poles.
7. The telescopic vibration control device of a suspension bridge sling as defined in claim 2, wherein: the first inner sleeve (11), the second inner sleeve (12), the third inner sleeve (13), the first outer sleeve (21), the second outer sleeve (22) and the third outer sleeve (23) are of split structures, and connecting flanges are arranged at two ends of the first outer sleeve (21), the second outer sleeve (22) and the third outer sleeve (23).
8. A telescopic vibration control device for a suspension bridge sling according to claim 3, wherein: the inner sleeve unit and the outer sleeve unit are of split structures, and connecting flanges are arranged at two ends of the outer sleeve unit.
9. The telescopic vibration control device of a suspension bridge sling as defined in claim 1, wherein: the damping filler is a plastic hose, modified asphalt or a damping rubber tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110152318.1A CN112878177B (en) | 2021-02-03 | 2021-02-03 | Sleeve type vibration control device for suspension bridge sling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110152318.1A CN112878177B (en) | 2021-02-03 | 2021-02-03 | Sleeve type vibration control device for suspension bridge sling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112878177A CN112878177A (en) | 2021-06-01 |
| CN112878177B true CN112878177B (en) | 2023-04-28 |
Family
ID=76057118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110152318.1A Active CN112878177B (en) | 2021-02-03 | 2021-02-03 | Sleeve type vibration control device for suspension bridge sling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112878177B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235430B (en) * | 2021-06-15 | 2023-05-16 | 大连交通大学 | Sleeve type vibration damper for cable bridge inhaul cable |
| CN117373219B (en) * | 2023-10-11 | 2024-05-17 | 合肥工业大学 | Short boom longitudinal bridge direction deviation early warning device and method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637186A (en) * | 2020-06-15 | 2020-09-08 | 大连理工大学 | Double-annular strong magnet array nonlinear dynamic vibration absorber with vibration reduction function of suspender and design method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005325608A (en) * | 2004-05-14 | 2005-11-24 | Tokai Rubber Ind Ltd | Damping device of pc outside cable in pc bridge |
| CN100557134C (en) * | 2006-05-08 | 2009-11-04 | 丁美林 | Built-in type hydraulic shock-absorbing damper |
| CN102409604B (en) * | 2011-09-01 | 2013-12-25 | 哈尔滨工业大学 | Device for damping and protecting bridge structural suspender |
| CN102518040B (en) * | 2011-11-23 | 2013-11-20 | 深圳大学 | Shock absorption damping device for bridge cable or suspender |
| CN203741714U (en) * | 2013-09-27 | 2014-07-30 | 柳州欧维姆机械股份有限公司 | Self-damping cable |
| CN103590320B (en) * | 2013-11-25 | 2016-08-17 | 大连海事大学 | A kind of vibration absorbing device for staying cables of bridge of cable-stayed bridge |
| CN103758029B (en) * | 2014-01-10 | 2015-10-07 | 东南大学 | A kind of magneto mass tuning damping unit controlled for suspension cable vibration damping |
| CN204570484U (en) * | 2015-04-14 | 2015-08-19 | 株洲时代新材料科技股份有限公司 | A kind of built-in dragline vibration absorber |
| CN110578297A (en) * | 2019-08-27 | 2019-12-17 | 河海大学 | eddy current damper suitable for any vibration direction of inhaul cable |
-
2021
- 2021-02-03 CN CN202110152318.1A patent/CN112878177B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111637186A (en) * | 2020-06-15 | 2020-09-08 | 大连理工大学 | Double-annular strong magnet array nonlinear dynamic vibration absorber with vibration reduction function of suspender and design method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112878177A (en) | 2021-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112878177B (en) | Sleeve type vibration control device for suspension bridge sling | |
| CN107060125B (en) | A kind of tuned mass damper device | |
| AU2021105110A4 (en) | Stay Cable Combined Vibration Damping Device and Method | |
| CN113445412B (en) | Vibration damper for controlling vortex-induced vibration of girder of large-span bridge | |
| CN210201726U (en) | Flexible direct-current conversion valve tower | |
| JP2007239306A (en) | Method of mounting base isolation damper | |
| CN110528777A (en) | Anti-seismic structure between a kind of assembled beam | |
| CN111456266B (en) | Semi-active pendulum type impact damper | |
| CN112467667A (en) | Multi-direction wire damper that shakes and wire structure that shakes that suppresses | |
| CN106012835A (en) | Cable structure shock-resistant protection device based on annular steel wire ropes | |
| KR102164349B1 (en) | Aseismatic Reinforcement Structure using Spring Damper | |
| US6386526B1 (en) | Cable stay aerodynamic damper band and method of use | |
| Chen et al. | Dynamic modeling and analysis of hanger cables with spacers and dampers for vibration mitigation | |
| CN206158319U (en) | Power line draw off mechanism of being under construction | |
| CN210140820U (en) | Self-resetting jacket ocean platform structure system based on built-in swinging column | |
| CN111519969A (en) | Breeze vibration pneumatic vibration damper for steel tube tower | |
| CN112377556B (en) | Combined vibration damper for suspension tunnel pipe body and anchor cable | |
| CN113756463B (en) | Damper for tower | |
| CN213234471U (en) | Breeze vibration pneumatic vibration damper for steel tube tower | |
| KR20190071108A (en) | Inertia friction damper of cable-attached type for decreasing vibration of stayed cable | |
| CN210838892U (en) | Inertia amplification type transmission line vibration damping cable | |
| CN110649551A (en) | Inertia amplification type transmission line vibration damping cable | |
| CN216129959U (en) | Suspension bridge anti-wind device | |
| KR102133043B1 (en) | Aseismatic Reinforcement Structure using Damping Device | |
| CN115776084A (en) | Wide band anti-galloping spacer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |