CN216405065U - Inhaul cable vibration reduction lamp and brightening device - Google Patents
Inhaul cable vibration reduction lamp and brightening device Download PDFInfo
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- CN216405065U CN216405065U CN202122798473.9U CN202122798473U CN216405065U CN 216405065 U CN216405065 U CN 216405065U CN 202122798473 U CN202122798473 U CN 202122798473U CN 216405065 U CN216405065 U CN 216405065U
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Abstract
The utility model relates to a stay cable vibration reduction lamp and a brightening device, which relate to the technical field of vibration control and comprise an annular clamp, a steel strand, an annular lamp holder and a buffer piece, wherein the annular clamp is sleeved outside the stay cable, one end of the steel strand is fixed on the annular clamp, the annular lamp holder is positioned below the annular clamp and sleeved outside the stay cable, a gap is arranged between the inner wall of the annular lamp holder and the stay cable, the annular lamp holder is fixedly connected with the other end of the steel strand, and the buffer piece is positioned between the annular lamp holder and the stay cable and is attached on the outer wall of the stay cable or the inner wall of the annular lamp holder; this application utilizes the bending stiffness of steel strand wires and the friction between the steel strand wires to form harmonious mass damper, recycles the clearance between annular lamp stand and bolster or bolster and the cable and reaches the purpose of collision power consumption to form impact mass damper. Therefore, the vibration of the stay cable structure can be effectively restrained, and the vibration stability of the stay cable structure after the newly added brightening lamp can be improved.
Description
Technical Field
The application relates to the technical field of vibration control, in particular to a stay cable vibration reduction lamp and a brightening device.
Background
In recent years, with the development of urban economy and the increase of demand for mental culture, a large-span bridge not only plays roles of connecting two banks and promoting the development of economy along rivers, but also is a beautiful landscape line in cities and a city name card in the world of getting up, and the large-span bridge in the cities is endowed with the landscape of the cities in dressing points to improve the mission of city taste. Therefore, more and more cities build urban night scenes by installing a light illumination project on cable structures of large-span bridges such as cable-stayed bridge stay cables, suspension bridge stay cables, arch bridge suspenders and the like.
As a main stressed component of the long-span bridge, the stay cables and the slings have the characteristics of large slenderness ratio, low damping and rich vibration modes, so that various large-amplitude vibrations, such as vortex-induced vibration, wind and rain excitation, wake galloping, parameter vibration and the like, can easily occur under the independent or combined action of different loads, such as wind load, rain load, traffic load and the like; in addition, most of the guy cable structures are not designed with the light and bright lamp additionally, so that after the lamp is arranged on the guy cable, the pneumatic appearance of the guy cable structure is obviously changed, the unit mass of the guy cable structure is increased, the dynamic characteristic of the guy cable structure is changed, and the flow field characteristics and the vibration stability around the guy cable structure are influenced; and this kind of influence of brightening the lamps and lanterns is long-term and lasting, so its change to the aerodynamic characteristics of cable structure and wind-resistant stability will also influence the long-term life of bridge structures.
Disclosure of Invention
The application provides a cable damping lamp and a brightening device to solve the problem that vibration stability of a cable structure is poor due to a newly-added brightening lamp in the related art.
In a first aspect, a cable vibration damping luminaire is provided, comprising:
the annular clamp is used for being sleeved and fixed outside the inhaul cable;
one end of the steel strand is fixed on the annular clamp;
the annular lamp holder is positioned below the annular clamp and sleeved outside the inhaul cable, a gap is formed between the inner wall of the annular lamp holder and the inhaul cable, and the annular lamp holder is fixedly connected with the other end of the steel stranded wire;
the buffer piece is positioned between the annular lamp holder and the inhaul cable and is attached to the outer wall of the inhaul cable or the inner wall of the annular lamp holder.
In some embodiments, the annular lamp base comprises:
an annular lamp holder body for receiving a lighting lamp;
and one end of the annular connecting piece is fixedly connected with the other end of the steel strand, and the other end of the annular connecting piece is connected with the annular lamp holder body.
In some embodiments, the annular connector is removably connected to the annular socket body.
In some embodiments, a sealing ring is disposed at a connection position of the annular connector and the annular lamp holder body.
In some embodiments, the plurality of steel strands are annularly distributed.
In some embodiments, the steel strands are galvanized steel strands.
In some embodiments, the ring clamp is bolted to the tension cable.
In some embodiments, the buffer is a rubber pad or a polyurethane cushion.
In a second aspect, a cable vibration-damping brightening device is provided, which includes: the plurality of stay cable vibration reduction lamps are arranged on the stay cable at intervals.
In some embodiments, a plurality of the stay wire vibration reduction lamps are arranged at intervals of a preset distance along the length direction of the stay wire.
The beneficial effect that technical scheme that this application provided brought includes: the vibration stability of the guy cable structure after the newly added lighting lamp can be effectively improved.
The application provides a stay cable vibration reduction lamp and a brightening device, which comprises an annular clamp, a steel strand, an annular lamp holder and a buffer piece, wherein the annular clamp is sleeved and fixed outside a stay cable, one end of the steel strand is fixed on the annular clamp, the annular lamp holder is positioned below the annular clamp and sleeved outside the stay cable, a gap is formed between the inner wall of the annular lamp holder and the stay cable, the annular lamp holder is fixedly connected with the other end of the steel strand, and the buffer piece is positioned between the annular lamp holder and the stay cable and attached to the outer wall of the stay cable or the inner wall of the annular lamp holder; this application utilizes the bending stiffness of steel strand wires and the friction between the steel strand wires to form harmonious mass damper, recycle annular lamp stand and bolster or the clearance between bolster and the cable and reach the purpose of collision power consumption, thereby form the impact mass damper, consequently, when the cable structure takes place the vibration of less amplitude, can carry out power consumption damping by harmonious mass damper, and when the cable structure takes place the vibration of great amplitude or control frequency not coupled, the accessible impact mass damper carries out power consumption damping, thereby reach the effect of restraining the vibration, improve the vibration stability of cable structure. Therefore, the vibration of the stay cable structure can be effectively restrained, and the vibration stability of the stay cable structure after the newly added brightening lamp can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a cable vibration reduction lamp provided in an embodiment of the present application;
fig. 2 is a schematic layout of a buffer provided in an embodiment of the present application;
fig. 3 is a partially enlarged view of the cable vibration reduction lamp according to the embodiment of the present application;
fig. 4 is a schematic structural diagram of an annular lamp holder body according to an embodiment of the present application.
In the figure: the novel lamp holder comprises a ring-shaped clamp 1, a steel strand 2, a ring-shaped lamp holder 3, a ring-shaped lamp holder body 31, a ring-shaped connecting piece 32, a buffer piece 4 and a pull rope 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a stay cable vibration reduction lamp and a brightening device, and can solve the problem that the vibration stability of a stay cable structure is poor due to the fact that a brightening lamp is newly added in the related art.
Referring to fig. 1 to 4, an embodiment of the application provides a stay cable vibration reduction lamp, which includes an annular clamp 1, at least one steel strand 2, an annular lamp holder 3 and a buffer 4, wherein the annular clamp 1 is used for being sleeved and fixed outside a stay cable 5, the annular clamp 1 can be composed of two semicircular rings, the stay cable 5 is embraced by the two semicircular rings, and then the stay cable 5 is preferably connected with a bolt, so that the stay cable vibration reduction lamp is convenient to disassemble and improves construction efficiency; one end of the steel strand 2 is fixed on the ring-shaped clamp 1, wherein the ring-shaped clamp 1 can be preferably a zinc-aluminum alloy casting with good corrosion resistance, and the steel strand 2 is also preferably a galvanized steel strand, so that the steel strand 2 can be directly fixedly connected with the ring-shaped clamp 1 through zinc-aluminum alloy cast-in-place, and therefore a connecting gap is eliminated and the durability is improved. In addition, the number of the steel strands 2 is preferably multiple, and the multiple steel strands 2 are distributed annularly, so that the vibration of the inhaul cable 5 in all directions in the same plane can be effectively controlled. The steel strand 2 may be used in this application as a tuned mass damper, since the bending stiffness of the steel strand 2 may provide stiffness, while the friction between the strands of the steel strand 2 may provide a damping parameter.
The annular lamp holder 3 is positioned below the annular clamp 1 and sleeved outside the inhaul cable 5, a gap is formed between the inner wall of the annular lamp holder 3 and the inhaul cable 5, and the annular lamp holder 3 is fixedly connected with the other end of the steel stranded wire 2, so that the annular lamp holder 3 serves as a mass and impact element of the damper and provides mass parameters; wherein, annular lamp stand 3 can be preferred including annular lamp stand body 31 and annular connecting piece 32, annular lamp stand body 31 is used for holding the light, and be structure from top to bottom with annular connecting piece 32, the one end of annular connecting piece 32 also can be preferred through cast-in-place other end fixed connection with steel strand wires 2 of zinc-aluminum alloy, the other end and the annular lamp stand body 31 of annular connecting piece 32 are connected, its connected mode can be preferred can dismantle the connection, for example bolted connection, in case the light in the annular lamp stand body 31 breaks down, can conveniently dismantle annular lamp stand body 31 the back and carry out the change of light. In addition, the junction of annular connecting piece 32 and annular lamp stand body 31 can be preferred to be equipped with the sealing washer, improves the leakproofness of junction, and then can avoid appearing because of the light damage problem that rainwater, dust etc. got into annular lamp stand body 31 and lead to.
The buffer 4 is preferably a rubber pad or a polyurethane buffer pad, is located between the annular lamp holder 3 and the stay cable 5, and is attached to the outer wall of the stay cable 5 or the inner wall of the annular lamp holder 3, namely, a gap exists between the buffer 4 and the annular lamp holder 3, or a gap exists between the buffer 4 and the stay cable 5, so that a space is provided for collision between the buffer 4 and the annular lamp holder 3 or the stay cable 5; the buffer 4 may preferably be a buffer washer when it is wrapped around the pull string 5, and a rubber ring when the buffer 4 is attached to the inner wall of the annular base 3. Can reach the function of the energy consumption of collision through the clearance between annular lamp stand 3 or cable 5 and the bolster 4 to form the impact mass damper, make this application possess the function of impact mass damper wide band control.
Therefore, the bending rigidity of the steel strand 2 and the friction between the strands of the steel strand are utilized to form the tuned mass damper, the gap between the annular lamp holder 3 and the buffer piece 4 or between the buffer piece 4 and the inhaul cable 5 is reused to achieve the purpose of energy consumption in collision, and therefore the impact mass damper is formed. Therefore, the vibration of the stay cable structure can be effectively restrained, and the vibration stability of the stay cable structure after the newly added brightening lamp can be improved.
In addition, the inhaul cable vibration reduction lamp can be used in cooperation with an illuminating lamp, can also be independently used for controlling inhaul cable vibration, can be vertically placed or obliquely placed, can determine the placement mode according to actual requirements, and further achieves the purpose of controlling vibration in each direction in the plane of the inhaul cable 5; and because this application utilizes steel strand wires 2 to provide rigidity and realizes harmonious attenuator, utilizes the collision power consumption to realize the impact mass attenuator for this application has harmonious attenuator and the advantage of impact mass attenuator damper concurrently, can effectively increase the damping ratio of cable 5, carries out cable multimode vibration control, consequently is obvious to the damping effect of long and thin members such as cable-stay structure, vertical hoist cable, jib to one side.
The adjustment of the control frequency can be realized by adjusting the quality of the annular lamp holder 3, the diameter and the length of the steel strand 2 and the like. Specifically, the control frequency calculation formula is as follows:
in the formula, f is the control frequency of the stay cable vibration reduction lamp, and the unit is Hz; m1Is the mass of the annular lamp holder body 31 in kg; m2The total mass of the annular connecting piece 32, the annular clamp 1 and the steel strand 2 is kg; k is the bending rigidity of the steel strand 2 and has the unit of N/m.
Wherein, the calculation formula of K is as follows:
in the formula, n is the number of the steel strands 2; e is the elastic modulus of the steel strand 2 and has a unit of 2X 1011N/m2(ii) a J is the moment of inertia of the steel strand 2 inm4(ii) a L is the length of the steel strand 2 in m.
The embodiment of the application further provides a cable damping and brightening device, which comprises: a plurality of aforementioned cable damping lamps and lanterns, a plurality of cable damping lamps and lanterns interval arrangement are on cable 5. The bending rigidity of the steel strand 2 and the friction between strands of the steel strand are utilized to form a tuned mass damper, and then the gap between the annular lamp holder 3 and the buffer part 4 or the gap between the buffer part 4 and the inhaul cable 5 is utilized to achieve the purpose of collision energy consumption, so that the impact mass damper is formed, therefore, the gap can be set to be large, when the inhaul cable structure generates vibration with small amplitude, the tuned mass damper can perform energy consumption and vibration reduction, and when the inhaul cable structure generates vibration with large amplitude or the control frequency is not coupled, the impact mass damper can perform energy consumption and vibration reduction, so that the effect of inhibiting vibration is achieved, and the vibration stability of the inhaul cable structure is improved; in addition, a plurality of dragline vibration reduction lamps and lanterns of interval arrangement can reach the function of multifrequency control. Therefore, the vibration of the stay cable structure can be effectively restrained, the vibration stability of the stay cable structure after the newly-added brightening lamp can be improved, multi-frequency control can be performed, and the vibration reduction function is achieved while the working effect of the brightening device is guaranteed.
Preferably, the plurality of stay cable vibration reduction lamps are arranged at intervals according to a preset distance along the cable length direction of the stay cable 5. For example, if there are five cable vibration-damping lamps, they can be respectively arranged at positions of L/2, L/4, L/6, L/8, L/10, etc. of the cable 5 in the cable length direction, and the control frequency is respectively 1 time, 2 times, 3 times, 4 times, 5 times, etc. of the fundamental frequency of the cable 5, thereby achieving the purpose of multi-frequency control.
Further, in the present embodiment, the annular lamp holder 3 includes: an annular lamp holder body 31, the annular lamp holder body 31 being for accommodating an illumination lamp; and one end of the annular connecting piece 32 is fixedly connected with the other end of the steel strand 2, and the other end of the annular connecting piece 32 is connected with the annular lamp holder body 31.
Further, in the present embodiment, the annular connector 32 is detachably connected to the annular socket body 31.
Furthermore, in the embodiment of the present application, a sealing ring is disposed at the connection position of the annular connecting member 32 and the annular lamp holder body 31.
Further, in the present embodiment, the plurality of steel strands 2 are annularly distributed.
Further, in the present embodiment, the steel strand 2 is a galvanized steel strand 2.
Further, in the present embodiment, the ring clamp 1 is bolted to the cable 5.
Further, in the present embodiment, the buffer 4 is a rubber pad or a polyurethane buffer.
The following embodiments will specifically explain the implementation process of the stay wire vibration-damping brightening device:
step 1: determining the number of lamps needing to be subjected to vibration reduction and cable brightening and the corresponding control order according to a cable vibration control target;
step 2: designing the mass M and the frequency f of the mass block of the vibration mode according to the vibration order of the inhaul cable;
and step 3: according to the mass M of the annular lamp holder body 311Determining the total mass M of the annular connecting element 32, the annular clamp 1 and the steel strand 22＝M-M1；
And 4, step 4: according to the formula
Determining the rigidity of the steel strand 2;
and 5: selecting the number n of steel strands according to a formula
Determining the type of the steel strand 2, including the elastic modulus E and the geometrical parameter of the steel strand 2, the section inertia moment J and the length L of the steel strand 2;
step 6: and installing the vibration reduction inhaul cable brightening lamp of the corresponding order at the corresponding position of the inhaul cable 5, determining the gap between the annular lamp holder body 31 and the inhaul cable 5 according to the inhaul cable controlled amplitude limit value, and arranging the buffer part 4.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present application and are presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A cable vibration damping luminaire, comprising:
the annular clamp (1), the annular clamp (1) is used for being sleeved and fixed outside the inhaul cable (5);
one end of the steel strand (2) is fixed on the annular clamp (1);
the annular lamp holder (3) is located below the annular clamp (1) and sleeved outside the inhaul cable (5), a gap is formed between the inner wall of the annular lamp holder (3) and the inhaul cable (5), and the annular lamp holder (3) is fixedly connected with the other end of the steel stranded wire (2);
the buffer piece (4) is located between the annular lamp holder (3) and the pull cable (5) and is attached to the outer wall of the pull cable (5) or the inner wall of the annular lamp holder (3).
2. Inhaul cable shock absorber lamp according to claim 1, characterized in that said annular lamp base (3) comprises:
an annular socket body (31), the annular socket body (31) being for accommodating a lighting lamp;
the lamp holder comprises an annular connecting piece (32), one end of the annular connecting piece (32) is fixedly connected with the other end of the steel strand (2), and the other end of the annular connecting piece is connected with the annular lamp holder body (31).
3. The cable damped light fitting of claim 2 wherein: the annular connecting piece (32) is detachably connected with the annular lamp holder body (31).
4. A cable damped light fitting as claimed in claim 3, wherein: and a sealing ring is arranged at the joint of the annular connecting piece (32) and the annular lamp holder body (31).
5. The cable damped light fitting of claim 1 wherein: the steel strands (2) are distributed annularly.
6. The cable damped light fitting of claim 1 wherein: the steel strand (2) is a galvanized steel strand (2).
7. The cable damped light fitting of claim 1 wherein: the annular clamp (1) is connected with the inhaul cable (5) through a bolt.
8. The cable damped light fitting of claim 1 wherein: the buffer piece (4) is a rubber pad or a polyurethane buffer pad.
9. The utility model provides a cable damping brightening device which characterized in that includes: a plurality of cable damping lights according to any one of claims 1 to 8, arranged at intervals on the cable (5).
10. A stay vibration-damping and brightening device according to claim 9, wherein: the stay cable vibration reduction lamps are arranged at intervals along the cable length direction of the stay cable (5) according to a preset distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122798473.9U CN216405065U (en) | 2021-11-15 | 2021-11-15 | Inhaul cable vibration reduction lamp and brightening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122798473.9U CN216405065U (en) | 2021-11-15 | 2021-11-15 | Inhaul cable vibration reduction lamp and brightening device |
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| Publication Number | Publication Date |
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| CN216405065U true CN216405065U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122798473.9U Active CN216405065U (en) | 2021-11-15 | 2021-11-15 | Inhaul cable vibration reduction lamp and brightening device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030016A (en) * | 2022-06-23 | 2022-09-09 | 河海大学 | Double-tuned mass damper for vibration reduction of suspension cable of suspension bridge |
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2021
- 2021-11-15 CN CN202122798473.9U patent/CN216405065U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115030016A (en) * | 2022-06-23 | 2022-09-09 | 河海大学 | Double-tuned mass damper for vibration reduction of suspension cable of suspension bridge |
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