CN117804714A - Axle coupling experimental device suitable for box girder bridge - Google Patents
Axle coupling experimental device suitable for box girder bridge Download PDFInfo
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- CN117804714A CN117804714A CN202311780083.6A CN202311780083A CN117804714A CN 117804714 A CN117804714 A CN 117804714A CN 202311780083 A CN202311780083 A CN 202311780083A CN 117804714 A CN117804714 A CN 117804714A
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- adjusting seat
- box girder
- beam body
- girder bridge
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- 230000008878 coupling Effects 0.000 title claims abstract description 15
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000001808 coupling effect Effects 0.000 abstract description 21
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 abstract description 4
- 230000003993 interaction Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses an axle coupling experimental device suitable for a box girder bridge, which belongs to the technical field of box girder bridge simulation and comprises a base and a test trolley, wherein the base is arranged in a wind field, an adjusting seat is rotatably connected to the base, and a positioning pin for limiting rotation of the adjusting seat is arranged on the adjusting seat; two arc-shaped connecting plates are symmetrically arranged above the adjusting seat, connecting pieces are hinged to the end parts of the connecting plates, and beam body models are detachably connected between the adjacent connecting pieces; the adjusting seat is provided with a plurality of supporting structures with adjustable heights, the end parts of the supporting structures are hinged with connecting seats, and the connecting seats are detachably connected with the bottoms of the corresponding connecting plates and the beam body model; the experimental device aims to solve the problems that the experimental device for the coupling effect of the current axle only considers the interaction between the vehicle and the axle, but does not consider the influence of environmental factors such as strong wind, earthquake and the like, and the experimental data is not accurate enough.
Description
Technical Field
The invention belongs to the technical field of box girder bridge simulation, and particularly relates to an axle coupling effect experimental device suitable for a box girder bridge.
Background
The vehicle is one of the main live loads born by the box girder bridge, and when the vehicle passes through the box girder bridge, coupling vibration is formed between the vehicle and the box girder bridge; at this time, the box girder bridge structure receives not only the effect of static force but also the effect of moving load and the vibration inertia force of the box girder bridge and the vehicle. And coupled vibrations cause vibrations in the upper structure of the girder bridge, which may fatigue structural members, reducing the strength and stability thereof: too much vibration of the box girder bridge may also have an effect on the running safety and stability of the vehicle on the bridge.
Therefore, in order to achieve the safety of the box girder bridge, an experiment of the coupling vibration of the box girder bridge is required when the structure of the box girder bridge is designed; however, the current experimental device for the coupling effect of the axle only considers the interaction between the vehicle and the axle, but does not consider the influence of strong wind, earthquake and other environmental factors, and the experimental data are not accurate enough.
Disclosure of Invention
In view of the above, the invention discloses an axle coupling experimental device suitable for a box girder bridge, which aims to solve the problem that the experimental device for the current axle coupling only considers the interaction between the vehicle and the axle, but does not consider the influence of environmental factors such as strong wind, earthquake and the like, and the experimental data is not accurate enough.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the axle coupling effect experimental device suitable for the box girder bridge comprises a base and a test trolley, wherein the base is arranged in a wind field, an adjusting seat is rotationally connected to the base, and a positioning pin for limiting rotation of the adjusting seat is arranged on the adjusting seat; two arc-shaped connecting plates are symmetrically arranged above the adjusting seat, connecting pieces are hinged to the end parts of the connecting plates, and beam body models are detachably connected between the adjacent connecting pieces; the adjusting seat is provided with a plurality of supporting structures with adjustable heights, the end parts of the supporting structures are hinged with connecting seats, the connecting seats are detachably connected with the corresponding connecting plates and the bottoms of the beam body models, and the adjusting seat is provided with a laser displacement sensor for the vibration condition of the beam body models; and a forced vibration structure for forcing the beam body model to vibrate is arranged between two adjacent support structures.
In the scheme, the beam body models at two ends are arranged on the connecting piece, so that the connecting plate and the beam body model form an annular lane, and then the test trolley is driven to and fro on the lane in a circulating way, thereby being convenient for accurately detecting the vibration of the beam body model due to the coupling effect of the axle; in addition, the heights of the connecting plates at two sides are adjusted by adjusting the height of the supporting structure, so that the purpose of adjusting the inclination of the beam body model is achieved, and the influence of the inclination of the beam body model on the coupling effect of the axle is tested; meanwhile, the size of the wind field is controlled by rotating the adjusting seat, so that the influence of the size and the angle of the wind field on the coupling effect of the axle is tested; when the influence of the earthquake factors on the coupling effect of the axle is required to be detected, the beam body model is vibrated by adopting a forced vibration structure, and the earthquake influence is simulated. According to the scheme, the influence of various environmental factors on the coupling effect of the axle can be measured, experimental data can be accurately obtained, and experimental precision is improved.
Further, a connecting hole is formed in the bottom of the beam body model, and a vibrating hole is formed in the top end of the connecting hole; the forced vibration structure comprises a reversing disc, two ends of the reversing disc are respectively connected with a support in a rotating manner along the circumferential direction of the reversing disc, the supports are fixedly connected with adjacent connecting seats, the reversing disc extending into the connecting holes is connected to the supports in a rotating manner, a sliding groove is horizontally formed in the reversing disc, a vibrating block with the top extending into the vibrating holes is connected to the sliding groove in a sliding manner, an elastic reset piece is arranged between the vibrating block and the sliding groove, a linear motor is arranged on the reversing disc, and a steel cable is arranged between the linear motor and the vibrating block.
In the scheme, after the beam body model is installed, the reversing disc extends into the connecting hole, and the vibrating hole extends into the vibrating hole; at the moment, the linear motor is started, the linear motor drives the vibrating block to horizontally move through the steel cable, and the vibrating block horizontally and circularly moves in a reciprocating mode through the cooperation of the elastic reset piece, so that the vibrating block continuously impacts the side wall of the vibrating hole, the beam body model is forced to vibrate, and the aim of simulating an earthquake is achieved; in addition, through rotating the switching-over dish to adjust the direction of vibrating piece reciprocating motion, play the purpose of adjusting the forced vibration direction of beam body model, further accurate simulation seismic factor is to the influence of axle coupling effect.
Further, the linking plate includes the plate body that the symmetry set up, the plate body is fixed in on the corresponding connecting seat, and is provided with vibration isolation rubber piece between the adjacent plate body.
Through being provided with vibration isolation rubber piece, prevent that the vibration of beam body model from causing the influence to another beam body model to initiate experimental error.
Further, a plurality of horizontally arranged adjusting grooves are formed in the adjusting seat, the adjusting grooves are connected with a support in a sliding mode, two groups of supporting structures are arranged on the support, and a bolt for limiting the support to slide is arranged on the support; the support comprises a telescopic support body which is rotationally connected with the reversing disc, and a support rod which is fixedly connected with the side wall of the connecting seat is fixed on the support body at the end part of the telescopic support body.
In the scheme, the sliding support drives the supporting structure and the connecting plates to move, so that the distance between the connecting plates is adjusted, beam body models with different lengths are met, and the influence of the length of the beam body on the coupling effect of the axle is detected conveniently; meanwhile, the support structure for the support beam body model can be used for simulating the bridge piers, and the influence of the bridge pier spacing on the coupling effect of the axle is simulated by adjusting the spacing of the support structure, so that the aim of improving the experimental precision is fulfilled.
Further, the supporting structure comprises a rod body vertically fixed on the support, the rod body is connected with a supporting rod coaxially in a threaded mode, and the connecting seat is hinged to the top end of the supporting rod.
Further, the bottom of the beam body model is provided with a containing groove for containing the bracket.
Further, the reversing disc is also provided with a locating pin for limiting the rotation of the reversing disc.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is a longitudinal cross-sectional view of a beam model in an embodiment of the invention;
FIG. 4 is an enlarged schematic view at B in FIG. 3;
fig. 5 is a schematic diagram illustrating connection between a strut and a connection base according to an embodiment of the present invention.
The figures are marked as follows: base 1, regulating seat 2, connecting piece 3, roof beam body model 4, connecting seat 5, switching-over dish 6, vibrating piece 7, linear motor 8, cable 9, elasticity restoring piece 10, plate 11, shock insulation rubber piece 12, support 13, expansion bracket body 14, branch 15, body of rod 16, bracing piece 17.
Detailed Description
As shown in fig. 1 to 5:
the axle coupling experimental device suitable for the box girder bridge comprises a base 1 and a test trolley (conventional technical means for a person skilled in the art and not shown in the figure), wherein an adjusting seat 2 is rotationally connected to the base 1, and a positioning pin (conventional technical means for the person skilled in the art and not shown in the figure) for limiting the rotation of the adjusting seat 2 is arranged on the adjusting seat 2; two arc-shaped connecting plates are symmetrically arranged above the adjusting seat 2, connecting pieces 3 are hinged to the end parts of the connecting plates, and beam body models 4 are detachably connected between the adjacent connecting pieces 3; the adjusting seat 2 is provided with a plurality of supporting structures with adjustable heights, the end parts of the supporting structures are hinged with connecting seats 5, the connecting seats 5 are detachably connected with the corresponding connecting plates and the bottoms of the beam body models 4, and the adjusting seat 2 is provided with a laser displacement sensor for the vibration condition of the beam body models 4; wherein a forced vibration structure is arranged between two adjacent support structures and used for forcing the beam body model 4 to vibrate.
In the scheme, the beam body models 4 at two ends are arranged on the connecting piece 3, so that the connecting plate and the beam body models 4 form an annular lane, and then the test trolley is driven to and fro circularly on the lane, thereby being convenient for accurately detecting the vibration of the beam body models 4 due to the coupling effect of the axles; in addition, the heights of the connecting plates at two sides are adjusted by adjusting the height of the supporting structure, so that the purpose of adjusting the inclination of the beam body model 4 is achieved, and the influence of the inclination of the beam body model 4 on the coupling effect of the axle is tested; meanwhile, the size of the wind field is controlled by rotating the adjusting seat 2, so that the influence of the size and the angle of the wind field on the coupling effect of the axle is tested; when the influence of the seismic factors on the coupling effect of the axle needs to be detected, the beam body model 4 is vibrated by adopting a forced vibration structure, and the seismic influence is simulated. According to the scheme, the influence of various environmental factors on the coupling effect of the axle can be measured, experimental data can be accurately obtained, and experimental precision is improved.
In this embodiment, a connection hole is formed at the bottom of the beam body model 4, and a vibration hole is formed at the top end of the connection hole; the forced vibration structure comprises a reversing disc 6, two ends of the reversing disc 6 are respectively connected with a support in a rotating manner along the circumferential direction of the reversing disc 6, the supports are fixedly connected with adjacent connecting seats 5, the reversing disc 6 extending into the connecting holes is connected to the supports in a rotating manner, sliding grooves are horizontally formed in the reversing disc 6, vibrating blocks 7 with the top ends extending into the vibrating holes are connected to the sliding grooves in a sliding manner, elastic reset pieces 10 are arranged between the vibrating blocks 7 and the sliding grooves, linear motors 8 are arranged on the reversing disc 6, and steel ropes 9 are arranged between the linear motors 8 and the vibrating blocks 7.
In the scheme, after the beam body model 4 is installed, the reversing disc 6 extends into the connecting hole, and the vibrating hole extends into the vibrating hole; at the moment, the linear motor 8 is started, the linear motor 8 drives the vibrating block 7 to horizontally move through the steel cable 9 and is matched with the elastic reset piece 10, so that the vibrating block 7 horizontally and circularly moves, the vibrating block 7 continuously impacts the side wall of the vibrating hole, and the beam body model 4 is forced to vibrate, so that the aim of simulating an earthquake is fulfilled; in addition, through rotating reversing disc 6 to adjust the direction of vibrating piece 7 reciprocating motion, play the purpose of adjusting the forced vibration direction of beam body model 4, further accurate simulation seismic factor's influence to the axle coupling effect.
In this embodiment, the connection plate includes symmetrically arranged plate bodies 11, the plate bodies 11 are fixed on the corresponding connection seats 5, and vibration isolation rubber blocks are bonded between adjacent plate bodies 11.
By the vibration isolation rubber blocks, the vibration of the beam body model 4 is prevented from affecting the other beam body model 4, so that experimental errors are caused.
In this embodiment, the adjusting seat 2 is provided with a plurality of horizontally arranged adjusting grooves, the adjusting grooves are slidably connected with the support 13, two groups of support structures are respectively provided on the support 13, and the support 13 is provided with a bolt (conventional technical means by those skilled in the art and therefore not shown) for limiting the sliding of the support 13; the support comprises a telescopic support body 14 which is rotationally connected with the reversing disc 6, and a support rod 15 which is fixedly connected with the side wall of the connecting seat 5 is fixed on the end part of the telescopic support body 14.
In the scheme, the sliding support 13 drives the supporting structure and the connecting plates to move, so that the distance between the connecting plates is adjusted, and beam body models 4 with different lengths are met, so that the influence of the length of a beam body on the coupling effect of an axle is conveniently detected; meanwhile, the support structure for supporting the beam body model 4 can be used for simulating the bridge pier, and the influence of the bridge pier space on the coupling effect of the axle is simulated by adjusting the space of the support structure, so that the aim of improving the experimental precision is fulfilled.
In this embodiment, the supporting structure includes a rod body 16 vertically fixed on the support 13, a coaxially disposed supporting rod 17 is screwed on the rod body 16, and the connection seat 5 is hinged to the top end of the supporting rod 17; the height of the supporting structure can be adjusted by rotating the rod body 16, and the method is simple, convenient and quick.
In this embodiment, roof beam body model 4 bottom is provided with the holding tank that is used for holding the support, prevents that the support from influencing the gas flow, avoids the experimental accuracy reduction of wind field to axle coupling effect influence.
In this embodiment, the reversing disc 6 is also provided with a positioning pin, which is used to limit the rotation of the reversing disc 6 relative to the frame body.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. Axle coupling experimental apparatus suitable for box girder bridge, including setting up base and test dolly in the wind field, its characterized in that: the base is rotatably connected with an adjusting seat, and the adjusting seat is provided with a positioning pin for limiting the rotation of the adjusting seat; two arc-shaped connecting plates are symmetrically arranged above the adjusting seat, connecting pieces are hinged to the end parts of the connecting plates, and beam body models are detachably connected between the adjacent connecting pieces; the adjusting seat is provided with a plurality of supporting structures with adjustable heights, the end parts of the supporting structures are hinged with connecting seats, the connecting seats are detachably connected with the corresponding connecting plates and the bottoms of the beam body models, and the adjusting seat is provided with a laser displacement sensor for the vibration condition of the beam body models; and a forced vibration structure for forcing the beam body model to vibrate is arranged between two adjacent support structures.
2. An axle coupling experimental device suitable for a box girder bridge according to claim 1, wherein: the bottom of the beam body model is provided with a connecting hole, and the top end of the connecting hole is provided with a vibrating hole; the forced vibration structure comprises a reversing disc, two ends of the reversing disc are respectively connected with a support in a rotating manner along the circumferential direction of the reversing disc, the supports are fixedly connected with adjacent connecting seats, the reversing disc extending into the connecting holes is connected to the supports in a rotating manner, a sliding groove is horizontally formed in the reversing disc, a vibrating block with the top extending into the vibrating holes is connected to the sliding groove in a sliding manner, an elastic reset piece is arranged between the vibrating block and the sliding groove, a linear motor is arranged on the reversing disc, and a steel cable is arranged between the linear motor and the vibrating block.
3. An axle coupling experimental device suitable for a box girder bridge according to claim 2, wherein: the connecting plate comprises symmetrically arranged plate bodies, wherein the plate bodies are fixed on the corresponding connecting seats, and vibration isolation rubber blocks are arranged between the adjacent plate bodies.
4. An axle coupling experimental set-up for a box girder bridge according to claim 3, wherein: the adjusting seat is provided with a plurality of horizontally arranged adjusting grooves, the adjusting grooves are connected with a support in a sliding mode, two groups of supporting structures are arranged on the support, and a bolt for limiting the support to slide is arranged on the support; the support comprises a telescopic support body which is rotationally connected with the reversing disc, and a support rod which is fixedly connected with the side wall of the connecting seat is fixed on the support body at the end part of the telescopic support body.
5. The axle coupling experimental apparatus for a box girder bridge according to claim 4, wherein: the supporting structure comprises a rod body vertically fixed on the support, the rod body is connected with a supporting rod coaxially arranged in a threaded manner, and the connecting seat is hinged to the top end of the supporting rod.
6. The axle coupling experimental apparatus for a box girder bridge according to claim 5, wherein: the bottom of the beam body model is provided with a containing groove for containing the bracket.
7. The axle coupling experimental apparatus for a box girder bridge according to claim 6, wherein: the reversing disc is also provided with a locating pin for limiting the rotation of the reversing disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311780083.6A CN117804714A (en) | 2023-12-22 | 2023-12-22 | Axle coupling experimental device suitable for box girder bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311780083.6A CN117804714A (en) | 2023-12-22 | 2023-12-22 | Axle coupling experimental device suitable for box girder bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117804714A true CN117804714A (en) | 2024-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311780083.6A Pending CN117804714A (en) | 2023-12-22 | 2023-12-22 | Axle coupling experimental device suitable for box girder bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117804714A (en) |
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2023
- 2023-12-22 CN CN202311780083.6A patent/CN117804714A/en active Pending
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