Dynamic balance testing device and testing method for frame bridge

Abstract

The invention relates to the technical field of frame bridge dynamic balance testing, and discloses a frame bridge dynamic balance testing device and method, and the device comprises a workbench, the top of the workbench is fixedly connected with a support, the top of the workbench is provided with a model bridge in a contact manner, and the device also comprises a dynamic balance testing mechanism. The dynamic balance testing mechanism comprises an electric telescopic rod fixedly connected to the top of the support, the whole model bridge is placed on the top of the workbench, the electric telescopic rod is started, the electric telescopic rod drives a concave shell to descend, the concave shell drives a rotating piece to descend, the rotating piece drives a roller to descend, and the roller makes contact with the top of the model bridge; the two rotating pieces are separated from each other under the action of slight elastic deformation of the first springs and the counter-acting force of the model bridge, and the rotating pieces drive the rollers to roll along the top of the model bridge, so that the vehicle passing simulation is performed, and the sensor can conveniently test the vehicle passing.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic balance testing of frame bridges, and in particular to a dynamic balance testing device and a testing method for a frame bridge. Background Art

[0002] The dynamic balance test device of the frame bridge is usually used to detect and analyze the response of the bridge structure under dynamic loads to evaluate the stability, vibration characteristics and vibration control effect of the bridge. Dynamic balance test is an important quality inspection method in bridge engineering, especially in the design, construction, operation and maintenance stages of the bridge, it is necessary to test the dynamic balance of the bridge to ensure the safety and stability of the bridge under various loads and use conditions.

[0003] The existing technology can set the bridge model on the device and test the bridge model by setting different structures, so as to simulate the test of the real bridge. However, usually only one real situation of the bridge model can be tested, while there are many different situations in reality, which will affect the accuracy of the multi-directional test of the bridge model. Summary of the invention

[0004] The purpose of the present invention is to provide a dynamic balance test device and a test method for a frame bridge to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a dynamic balance testing device and a testing method for a frame bridge, comprising a workbench, a bracket fixedly connected to the top of the workbench, a model bridge contacting the top of the workbench, and a dynamic balance testing mechanism, the dynamic balance testing mechanism comprising an electric telescopic rod fixedly connected to the top of the bracket, the movable end of the electric telescopic rod penetrates the bracket and extends to the outside of the bracket, the bottom of the electric telescopic rod is fixedly connected to a concave shell, the two ends of one side of the inner wall of the concave shell are respectively rotatably connected to rotating parts, a first spring is fixedly connected between the two rotating parts, and a simulation component is arranged on the outer wall of the rotating part.

[0006] Furthermore, the simulation component includes rollers slidably connected to the outer walls at both ends of the bottom of the rotating member, a second spring is fixedly connected between the two rollers, the second spring is arranged on the inner wall of the rotating member, and one end of the roller is rotatably connected to a locking plate.

[0007] Furthermore, a test assembly is provided on the top of the model bridge, and the test assembly includes an L-shaped plate fixedly connected to both sides of the top of the model bridge, a sensor fixedly connected to the top of the L-shaped plate, one end of the L-shaped plate is rotatably connected to an extrusion frame rod, an arc spring is fixedly connected between the two extrusion frame rods, an elastic rod is fixedly connected to the side wall of one end of the extrusion frame rod, and the bottom of the elastic rod is slidably connected to the top of the model bridge.

[0008] Furthermore, a clamping assembly is provided on the side wall of the concave shell, and the clamping assembly includes a rotating rod rotatably connected to both sides of the concave shell, and one end of the rotating rod away from the concave shell is rotatably connected to a slider, and sliding grooves are respectively provided on both sides of the top of the inner wall of the bracket.

[0009] Furthermore, the top outer wall of the slider is slidably connected to the inner wall of the slide groove, the bottom of the slider is fixedly connected to a vertical rod, the bottom of the vertical rod is fixedly connected to a square shell, the inner wall of the square shell is slidably connected to a sliding plate, and one side of the sliding plate is fixedly connected to a first return spring.

[0010] Furthermore, one end of the first return spring is fixedly connected to one side of the inner wall of the square shell, the side of the sliding plate away from the first return spring is fixedly connected to a connecting rod, and one end of the connecting rod away from the sliding plate is fixedly connected to a special-shaped splint, and both ends of one side of the special-shaped splint are respectively in contact with one side of the outer wall of the model bridge.

[0011] Furthermore, an excitation component is arranged on the top of the workbench, and the excitation component comprises a fixed rod fixedly connected to the center of the top of the workbench, the top of the fixed rod is fixedly connected to a fixed shell, and the bottom sides of the fixed shell are respectively connected to curved pipes.

[0012] Furthermore, one end of the bent pipe passes through the connecting rod and extends to the outside of the sliding plate, the inner wall of the fixed shell is slidably connected to a lifting plate, the top of the lifting plate is fixedly connected to a second return spring, the top of the second return spring is fixedly connected to the top of the inner wall of the fixed shell, and the lifting plate is fixedly connected to a round rod near the top of the second return spring.

[0013] Furthermore, the top end of the round rod passes through the fixed shell and extends to the outside of the fixed shell, the top of the round rod is fixedly connected to a strike plate, the tops of both sides of the strike plate are respectively fixedly connected to a number of strike rods, the bottoms of both sides of the fixed shell are respectively connected to air pipes, four air pipes are provided, and one end of the air pipe away from the fixed shell is connected to an arc-shaped bucket.

[0014] A testing method for a dynamic balance testing device of a frame bridge comprises the following steps: Step 1: Vehicle simulation, place the model bridge as a whole on the top of the workbench, start the electric telescopic rod, the electric telescopic rod drives the concave shell to descend, the concave shell drives the rotating part to descend, the rotating part drives the roller to descend, so that the roller contacts the top of the model bridge, and the two rotating parts move away from each other due to the slight elastic deformation of the first spring and the reaction force of the model bridge, and the rotating part drives the roller to roll along the top of the model bridge; Step 2: Car accident simulation: when the rotating part drives the roller to roll along the top of the model bridge, the side wall of the rotating part will come into contact with one end of the extrusion frame rod, causing the extrusion frame rod to be squeezed. Because of the reaction force exerted by the L-shaped plate on the extrusion frame rod, the extrusion frame rod rotates in a small range along the side wall of the L-shaped plate, and the two extrusion frame rods move away from each other. The extrusion frame rod drives the elastic rod to move. During the movement of the elastic rod, it will come into contact with the bottom of one end of the roller, squeezing the roller and causing the roller to move toward the side wall of the model bridge. Step 3: Earthquake simulation: when the special-shaped splint contacts the side wall of the model bridge, it is subjected to the reaction force of the model bridge, so that the special-shaped splint drives the connecting rod to move into the inside of the square shell, and the connecting rod drives the sliding plate to slide inside the square shell, so that the airflow inside the square shell enters the inside of the bent pipe, and the airflow enters the inside of the fixed shell through the bent pipe. The air pressure causes the lifting plate inside the fixed shell to move upward, and the lifting plate drives the round rod to move upward, and the round rod drives the impact plate to move upward, and the impact plate drives the impact rod to move upward. During the upward movement of the impact rod, it will come into contact with the bottom of the model bridge; Step 4: Auxiliary test, when the lifting plate moves up to the top of the inner wall of the fixed shell, the airflow is no longer blocked, and the airflow enters the inside of the air pipe. The airflow passes through the air pipe and enters the inside of the arc bucket. Due to the setting of the arc bucket, the airflow is diffused, thereby blowing the cable at the model bridge.

[0015] The present invention has the following beneficial effects: (1) The present invention places the model bridge as a whole on the top of the workbench, starts the electric telescopic rod, the electric telescopic rod drives the concave shell to descend, the concave shell drives the rotating part to descend, the rotating part drives the roller to descend, so that the roller contacts the top of the model bridge, and is slightly elastically deformed by the first spring and the reaction force of the model bridge, so that the two rotating parts move away from each other, and the rotating part drives the roller to roll along the top of the model bridge, thereby simulating the passing of a vehicle, which is convenient for the sensor to test the passing of the vehicle. At the same time, the concave shell drives the rotating rod to descend, and is limited by the slide groove. The rotating rod drives the slider to slide along the inner wall of the slide groove, the slider drives the vertical rod to move, the vertical rod drives the square shell to move, the square shell drives the sliding plate to move, the sliding plate drives the connecting rod to move, the connecting rod drives the special-shaped clamping plate to move, and the two special-shaped clamping plates move closer to each other, thereby clamping the model bridge in the center, preventing the model bridge from shaking left and right during the test, and improving the test accuracy of the sensor.

[0016] (2) In the present invention, when the rotating member drives the roller to roll along the top of the model bridge, the side wall of the rotating member will come into contact with one end of the extrusion frame rod, causing the extrusion frame rod to be squeezed. Because the reaction force exerted by the L-shaped plate on the extrusion frame rod causes the extrusion frame rod to rotate in a small range along the side wall of the L-shaped plate, the two extrusion frame rods move away from each other, and the extrusion frame rod drives the elastic rod to move. During the movement of the elastic rod, it will come into contact with the bottom of one end of the roller, squeezing the roller, causing the roller to move toward the side wall of the model bridge and produce a collision, thereby simulating the situation where a vehicle crashes into the guardrail in a traffic accident, thereby improving the diversity of the test and indirectly improving the accuracy of the sensor in testing the model bridge.

[0017] (3) According to the present invention, when the special-shaped clamping plate contacts the side wall of the model bridge, the special-shaped clamping plate is subjected to the reaction force of the model bridge, so that the special-shaped clamping plate drives the connecting rod to move into the interior of the square shell, and the connecting rod drives the sliding plate to slide in the interior of the square shell, so that the airflow in the square shell enters the interior of the bent pipe, and the airflow enters the interior of the fixed shell through the bent pipe. The air pressure causes the lifting plate in the fixed shell to move upward, and the lifting plate drives the round rod to move upward, and the round rod drives the impact plate to move upward, and the impact plate drives the impact rod to move upward. During the upward movement of the impact rod, it will contact the bottom of the model bridge, causing the bottom of the model bridge to be subjected to a large-scale vibration phenomenon, thereby simulating the load change of the model bridge during an earthquake, further improving the diversity of the test, and improving the accuracy of the model bridge test from the side. When the model bridge is hit upward, because the L-shaped plate rolls on the top of the model bridge, it can prevent the model bridge from sliding upward, further improving the accuracy of the model bridge test.

[0018] (4) In the present invention, when the lifting plate moves up to the top of the inner wall of the fixed shell, the airflow is no longer blocked, and the airflow enters the interior of the air pipe, and then enters the interior of the arc bucket through the air pipe. Due to the setting of the arc bucket, the airflow is diffused, thereby blowing the cable at the model bridge, so as to test the load on the model bridge as a whole when the cable moves, thereby improving the diversity of the test. At this time, the second return spring is elastically deformed, and the second return spring presses down the lifting plate, causing the lifting plate to slide down along the inner wall of the fixed shell, and then is pushed up again by the air pressure, so that the impact rod can repeatedly impact the bottom of the model bridge, thereby improving the accuracy of the sensor's test of the model bridge.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the concave shell of the present invention; Figure 4 This is a schematic diagram of the top view of the structure of the model bridge of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the square shell of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the workbench of the present invention; Figure 7 For the present invention Figure 2 A magnified view of middle; Figure 8 For the present invention Figure 5 Enlarged view of middle B; Fig. 9 The figure is a flow chart of the testing method of the present invention.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1, workbench; 2, bracket; 3, model bridge; 4, dynamic balance test mechanism; 41, electric telescopic rod; 42, concave shell; 43, rotating part; 44, first spring; 45, simulation component; 46, test component; 47, clamping component; 48, excitation component; 451, roller; 452, second spring; 453, positioning plate; 461, L-shaped plate; 462, sensor; 463, extrusion frame rod; 464, arc spring; 465, Elastic rod; 471, rotating rod; 472, slider; 473, slide groove; 474, vertical rod; 475, square shell; 476, sliding plate; 477, first return spring; 478, connecting rod; 479, special-shaped splint; 481, fixed rod; 482, fixed shell; 483, bent pipe; 484, lifting plate; 485, second return spring; 486, round rod; 487, impact plate; 488, impact rod; 489, air pipe; 4810, arc bucket. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1, please refer to Figure 1 - Fig. 9 As shown, the present invention is a dynamic balance test device and test method for a frame bridge, comprising a workbench 1, a bracket 2 is fixedly connected to the top of the workbench 1, a model bridge 3 is contacted and arranged on the top of the workbench 1, and further comprising; The dynamic balancing test mechanism 4 includes an electric telescopic rod 41 fixedly connected to the top of the bracket 2, the movable end of the electric telescopic rod 41 passes through the bracket 2 and extends to the outside of the bracket 2, the bottom of the electric telescopic rod 41 is fixedly connected with a concave shell 42, and the two ends of one side of the inner wall of the concave shell 42 are respectively rotatably connected with rotating parts 43, a first spring 44 is fixedly connected between the two rotating parts 43, and the outer wall of the rotating part 43 is provided with a simulation component 45.

[0025] The simulation component 45 includes rollers 451 slidably connected to the outer walls at both ends of the bottom of the rotating member 43, a second spring 452 is fixedly connected between the two rollers 451, the second spring 452 is arranged on the inner wall of the rotating member 43, and one end of the roller 451 is rotatably connected to a locking plate 453.

[0026] A test assembly 46 is provided on the top of the model bridge 3, so that the roller 451 moves toward the side wall of the model bridge 3 to generate an impact, thereby simulating a situation in which a vehicle crashes into a guardrail in a traffic accident, thereby improving the diversity of the test and laterally improving the accuracy of the sensor 462 in testing the model bridge 3. The test assembly 46 includes an L-shaped plate 461 fixedly connected to both sides of the top of the model bridge 3. When the model bridge 3 is hit upward, the L-shaped plate 461 rolls on the top of the model bridge 3, thereby preventing the model bridge 3 from sliding up, thereby further improving the test accuracy of the model bridge 3. The top of the L-shaped plate 461 is fixedly connected with a sensor 462, and one end of the L-shaped plate 461 is rotatably connected with an extrusion frame rod 463, and an arc spring 464 is fixedly connected between the two extrusion frame rods 463. An elastic rod 465 is fixedly connected to the side wall of one end of the extrusion frame rod 463, and the bottom of the elastic rod 465 is slidably connected to the top of the model bridge 3.

[0027] A clamping assembly 47 is provided on the side wall of the concave shell 42, and the clamping assembly 47 includes a rotating rod 471 rotatably connected to both sides of the concave shell 42, and a slider 472 is rotatably connected to one end of the rotating rod 471 away from the concave shell 42, and sliding grooves 473 are respectively opened on both sides of the top of the inner wall of the bracket 2.

[0028] The top outer wall of the slider 472 is slidably connected to the inner wall of the slide groove 473, the bottom of the slider 472 is fixedly connected to a vertical rod 474, the bottom of the vertical rod 474 is fixedly connected to a square shell 475, the inner wall of the square shell 475 is slidably connected to a sliding plate 476, and one side of the sliding plate 476 is fixedly connected to a first return spring 477.

[0029] One end of the first return spring 477 is fixedly connected to one side of the inner wall of the square shell 475, and the side of the sliding plate 476 away from the first return spring 477 is fixedly connected to a connecting rod 478, and the end of the connecting rod 478 away from the sliding plate 476 is fixedly connected to a special-shaped clamping plate 479, and the concave shell 42 drives the rotating rod 471 to descend, and is limited by the sliding groove 473, and the rotating rod 471 drives the slider 472 to slide along the inner wall of the sliding groove 473, and the slider 472 drives the vertical rod 474 to move, and the vertical rod 474 drives The movable square shell 475 moves, the square shell 475 drives the sliding plate 476 to move, the sliding plate 476 drives the connecting rod 478 to move, the connecting rod 478 drives the special-shaped clamping plate 479 to move, and the two special-shaped clamping plates 479 approach each other, thereby centering and clamping the model bridge 3 to prevent the model bridge 3 from shaking left and right during the test, thereby improving the test accuracy of the sensor 462, and the two ends of one side of the special-shaped clamping plate 479 are respectively in contact with one side of the outer wall of the model bridge 3.

[0030] In Example 2, an excitation component 48 is arranged on the top of the workbench 1. When the lifting plate 484 moves up to the top of the inner wall of the fixed shell 482, the airflow is no longer blocked, and the airflow enters the inside of the air pipe 489. The airflow enters the inside of the arc bucket 4810 through the air pipe 489. Due to the setting of the arc bucket 4810, the airflow is diffused, so as to blow the cable at the model bridge 3, so as to test the load of the model bridge 3 as a whole when the cable moves, thereby improving the diversity of the test. At this time, the second return spring 485 is elastically deformed. The second return spring 485 presses down the lifting plate 484, causing the lifting plate 484 to slide down along the inner wall of the fixed shell 482, and then move upward again due to the push of air pressure, so that the impact rod 488 can repeatedly impact the bottom of the model bridge 3, thereby improving the test accuracy of the sensor 462 on the model bridge 3. The excitation component 48 includes a fixed rod 481 fixedly connected to the top center of the workbench 1, and the top of the fixed rod 481 is fixedly connected to the fixed shell 482, and the bottom sides of the fixed shell 482 are respectively connected to curved pipes 483.

[0031] One end of the bent pipe 483 passes through the connecting rod 478 and extends to the outside of the sliding plate 476. The inner wall of the fixed shell 482 is slidably connected with a lifting plate 484. The top of the lifting plate 484 is fixedly connected with a second return spring 485. The top of the second return spring 485 is fixedly connected to the top of the inner wall of the fixed shell 482. The lifting plate 484 is fixedly connected with a round rod 486 near the top of the second return spring 485.

[0032] The top of the round rod 486 passes through the fixed shell 482 and extends to the outside of the fixed shell 482. The top of the round rod 486 is fixedly connected to the impact plate 487. The tops of both sides of the impact plate 487 are respectively fixedly connected to a plurality of impact rods 488. The bottoms of both sides of the fixed shell 482 are respectively connected to air pipes 489. Four air pipes 489 are provided. One end of the air pipe 489 away from the fixed shell 482 is connected to an arc-shaped bucket 4810.

[0033] A testing method for a dynamic balance testing device of a frame bridge comprises the following steps: Step 1: Vehicle simulation, place the model bridge 3 as a whole on the top of the workbench 1, start the electric telescopic rod 41, the electric telescopic rod 41 drives the concave shell 42 to descend, the concave shell 42 drives the rotating member 43 to descend, the rotating member 43 drives the roller 451 to descend, so that the roller 451 contacts the top of the model bridge 3, and is slightly elastically deformed by the first spring 44 and the reaction force of the model bridge 3, so that the two rotating members 43 move away from each other, and the rotating member 43 drives the roller 451 to roll along the top of the model bridge 3; Step 2: Car accident simulation, when the rotating member 43 drives the roller 451 to roll along the top of the model bridge 3, the side wall of the rotating member 43 will come into contact with one end of the extrusion frame rod 463, so that the extrusion frame rod 463 is squeezed. Because the reaction force applied by the L-shaped plate 461 to the extrusion frame rod 463 causes the extrusion frame rod 463 to rotate in a small range along the side wall of the L-shaped plate 461, the two extrusion frame rods 463 move away from each other, and the extrusion frame rod 463 drives the elastic rod 465 to move. During the movement of the elastic rod 465, it will come into contact with the bottom of one end of the roller 451, squeeze the roller 451, and make the roller 451 move toward the side wall of the model bridge 3; Step 3: Earthquake simulation. When the special-shaped splint 479 contacts the side wall of the model bridge 3, it is subjected to the reaction force of the model bridge 3, so that the special-shaped splint 479 drives the connecting rod 478 to move into the square shell 475, and the connecting rod 478 drives the sliding plate 476 to slide inside the square shell 475, so that the airflow inside the square shell 475 enters the inside of the curved pipe 483, and the airflow enters the inside of the fixed shell 482 through the curved pipe 483. The air pressure causes the lifting plate 484 inside the fixed shell 482 to move upward, and the lifting plate 484 drives the round rod 486 to move upward, and the round rod 486 drives the impact plate 487 to move upward, and the impact plate 487 drives the impact rod 488 to move upward. During the upward movement, the impact rod 488 will contact the bottom of the model bridge 3; Step 4: Auxiliary test. When the lifting plate 484 moves up to the top of the inner wall of the fixed shell 482, the airflow is no longer blocked, and the airflow enters the interior of the air pipe 489. The airflow enters the interior of the arc bucket 4810 through the air pipe 489. Due to the setting of the arc bucket 4810, the airflow is diffused, thereby blowing the cable at the model bridge 3.

[0034] When in use, the model bridge 3 is placed on the top of the workbench 1 as a whole, and the electric telescopic rod 41 is started, the electric telescopic rod 41 drives the concave shell 42 to descend, the concave shell 42 drives the rotating member 43 to descend, and the rotating member 43 drives the roller 451 to descend, so that the roller 451 contacts the top of the model bridge 3, and is slightly elastically deformed by the first spring 44 and the reaction force of the model bridge 3, so that the two rotating members 43 move away from each other, and the rotating member 43 drives the roller 451 to roll along the top of the model bridge 3, thereby simulating the passing of a vehicle, which is convenient for the sensor 462 to test the passing of a vehicle, and at the same time, the concave shell 42 The rotating rod 471 is driven to descend and is limited by the slide groove 473. The rotating rod 471 drives the slider 472 to slide along the inner wall of the slide groove 473. The slider 472 drives the vertical rod 474 to move. The vertical rod 474 drives the square shell 475 to move. The square shell 475 drives the sliding plate 476 to move. The sliding plate 476 drives the connecting rod 478 to move. The connecting rod 478 drives the special-shaped clamping plate 479 to move. The two special-shaped clamping plates 479 approach each other, thereby centering and clamping the model bridge 3 to prevent the model bridge 3 from shaking left and right during the test, thereby improving the test accuracy of the sensor 462.

[0035] When the rotating member 43 drives the roller 451 to roll along the top of the model bridge 3, the side wall of the rotating member 43 will contact one end of the extrusion frame rod 463, so that the extrusion frame rod 463 is squeezed. Because the reaction force applied by the L-shaped plate 461 to the extrusion frame rod 463, the extrusion frame rod 463 rotates in a small range along the side wall of the L-shaped plate 461, and the two extrusion frame rods 463 move away from each other. The extrusion frame rod 463 drives the elastic rod 465 to move. During the movement of the elastic rod 465, it will contact the bottom of one end of the roller 451, squeeze the roller 451, and move the roller 451 toward the side wall of the model bridge 3, causing a collision, thereby simulating the situation where a vehicle crashes into the guardrail, thereby improving the diversity of the test and indirectly improving the accuracy of the sensor 462 in testing the model bridge 3.

[0036] When the special-shaped clamping plate 479 contacts the side wall of the model bridge 3, the reaction force of the model bridge 3 causes the special-shaped clamping plate 479 to drive the connecting rod 478 to move into the square shell 475, and the connecting rod 478 drives the sliding plate 476 to slide inside the square shell 475, so that the airflow inside the square shell 475 enters the inside of the curved pipe 483, and the airflow enters the inside of the fixed shell 482 through the curved pipe 483, and the air pressure causes the lifting plate 484 inside the fixed shell 482 to move upward, and the lifting plate 484 drives the round rod 486 to move upward, and the round rod 486 drives the impact plate 4 87 moves upward, and the impact plate 487 drives the impact rod 488 to move upward. During the upward movement, the impact rod 488 will come into contact with the bottom of the model bridge 3, causing the bottom of the model bridge 3 to vibrate in a large range, thereby simulating the load change of the model bridge 3 during an earthquake, further improving the diversity of the test, and indirectly improving the accuracy of the test of the model bridge 3. When the model bridge 3 is hit upward, because the L-shaped plate 461 rolls on the top of the model bridge 3, it can prevent the model bridge 3 from sliding up, further improving the test accuracy of the model bridge 3.

[0037] When the lifting plate 484 moves up to the top of the inner wall of the fixed shell 482, the airflow is no longer blocked, and the airflow enters the interior of the air pipe 489, and then enters the interior of the arc bucket 4810 through the air pipe 489. Due to the setting of the arc bucket 4810, the airflow is diffused, thereby blowing the cable at the model bridge 3, thereby testing the load on the model bridge 3 as a whole when the cable moves, thereby improving the diversity of the test. At this time, due to the elastic deformation of the second return spring 485, the second return spring 485 presses down the lifting plate 484, causing the lifting plate 484 to slide down along the inner wall of the fixed shell 482, and then moves up again due to the push of air pressure, so that the impact rod 488 can repeatedly impact the bottom of the model bridge 3, thereby improving the test accuracy of the sensor 462 on the model bridge 3.

[0038] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dynamic balance test device for a frame bridge, characterized in that: It comprises a workbench (1), the top of the workbench (1) is fixedly connected to a bracket (2), the top of the workbench (1) is provided with a model bridge (3) in contact with the top, and further comprises: A dynamic balancing test mechanism (4), the dynamic balancing test mechanism (4) comprising an electric telescopic rod (41) fixedly connected to the top of a bracket (2), the movable end of the electric telescopic rod (41) passing through the bracket (2) and extending to the outside of the bracket (2), the bottom of the electric telescopic rod (41) being fixedly connected to a concave shell (42), the two ends of one side of the inner wall of the concave shell (42) being rotatably connected to rotating members (43), a first spring (44) being fixedly connected between the two rotating members (43), and the outer wall of the rotating member (43) being provided with a simulation component (45).

2. The dynamic balance test device for a frame bridge according to claim 1, characterized in that: The simulation component (45) comprises rollers (451) slidably connected to the outer walls at both ends of the bottom of the rotating member (43); a second spring (452) is fixedly connected between the two rollers (451); the second spring (452) is arranged on the inner wall of the rotating member (43); and one end of the roller (451) is rotatably connected to a locking plate (453).

3. The dynamic balance test device for a frame bridge according to claim 2, characterized in that: A test assembly (46) is provided on the top of the model bridge (3), and the test assembly (46) comprises an L-shaped plate (461) fixedly connected to both sides of the top of the model bridge (3); a sensor (462) is fixedly connected to the top of the L-shaped plate (461); two ends of one side of the L-shaped plate (461) are rotatably connected to extrusion racks (463), an arc spring (464) is fixedly connected between the two extrusion racks (463); an elastic rod (465) is fixedly connected to the side wall of one end of the extrusion rack (463); and the bottom of the elastic rod (465) is slidably connected to the top of the model bridge (3).

4. The dynamic balance test device for a frame bridge according to claim 3, characterized in that: The side wall of the concave shell (42) is provided with a clamping assembly (47), and the clamping assembly (47) comprises a rotating rod (471) rotatably connected to two sides of the concave shell (42), and one end of the rotating rod (471) away from the concave shell (42) is rotatably connected to a sliding block (472), and sliding grooves (473) are respectively provided on both sides of the top of the inner wall of the bracket (2).

5. The dynamic balance test device for a frame bridge according to claim 4, characterized in that: The top outer wall of the slider (472) is slidably connected to the inner wall of the slide groove (473); the bottom of the slider (472) is fixedly connected to a vertical rod (474); the bottom of the vertical rod (474) is fixedly connected to a square shell (475); the inner wall of the square shell (475) is slidably connected to a sliding plate (476); and one side of the sliding plate (476) is fixedly connected to a first return spring (477).

6. The dynamic balance test device for a frame bridge according to claim 5, characterized in that: One end of the first return spring (477) is fixedly connected to one side of the inner wall of the square shell (475); a side of the sliding plate (476) away from the first return spring (477) is fixedly connected to a connecting rod (478); an end of the connecting rod (478) away from the sliding plate (476) is fixedly connected to a special-shaped clamping plate (479); two ends of one side of the special-shaped clamping plate (479) are respectively contacted with one side of the outer wall of the model bridge (3).

7. The dynamic balance test device for a frame bridge according to claim 6, characterized in that: An excitation component (48) is arranged on the top of the workbench (1), and the excitation component (48) comprises a fixed rod (481) fixedly connected to the center of the top of the workbench (1), a fixed shell (482) is fixedly connected to the top of the fixed rod (481), and two sides of the bottom of the fixed shell (482) are respectively connected to curved pipes (483).

8. The dynamic balance test device for a frame bridge according to claim 7, characterized in that: One end of the curved tube (483) passes through the connecting rod (478) and extends to the outside of the sliding plate (476); the inner wall of the fixed shell (482) is slidably connected to a lifting plate (484); the top of the lifting plate (484) is fixedly connected to a second return spring (485); the top of the second return spring (485) is fixedly connected to the top of the inner wall of the fixed shell (482); and the lifting plate (484) is fixedly connected to a round rod (486) near the top of the second return spring (485).

9. The dynamic balance test device for a frame bridge according to claim 8, characterized in that: The top end of the round rod (486) passes through the fixed shell (482) and extends to the outside of the fixed shell (482); the top of the round rod (486) is fixedly connected to an impact plate (487); the tops of both sides of the impact plate (487) are respectively fixedly connected to a plurality of impact rods (488); the bottoms of both sides of the fixed shell (482) are respectively connected to air pipes (489); four air pipes (489) are provided; and one end of the air pipe (489) away from the fixed shell (482) is connected to an arc-shaped bucket (4810).

10. A method for testing a dynamic balance test device for a frame bridge, using the dynamic balance test device for a frame bridge as claimed in claim 9, characterized in that: The following steps are included: Step 1: vehicle simulation, placing the model bridge (3) as a whole on the top of the workbench (1), starting the electric telescopic rod (41), the electric telescopic rod (41) drives the concave shell (42) to descend, the concave shell (42) drives the rotating member (43) to descend, the rotating member (43) drives the roller (451) to descend, so that the roller (451) contacts the top of the model bridge (3), and is slightly elastically deformed by the first spring (44) and the reaction force of the model bridge (3), so that the two rotating members (43) move away from each other, and the rotating member (43) drives the roller (451) to roll along the top of the model bridge (3); Step 2: Car accident simulation, when the rotating member (43) drives the roller (451) to roll along the top of the model bridge (3), the side wall of the rotating member (43) will come into contact with one end of the extrusion frame rod (463), so that the extrusion frame rod (463) is squeezed. Because the reaction force applied by the L-shaped plate (461) to the extrusion frame rod (463) causes the extrusion frame rod (463) to rotate in a small range along the side wall of the L-shaped plate (461), the two extrusion frame rods (463) move away from each other, and the extrusion frame rod (463) drives the elastic rod (465) to move. During the movement of the elastic rod (465), it will come into contact with the bottom of one end of the roller (451), squeeze the roller (451), and cause the roller (451) to move toward the side wall of the model bridge (3); Step 3: earthquake simulation, when the special-shaped clamping plate (479) contacts the side wall of the model bridge (3), it is subjected to the reaction force of the model bridge (3), so that the special-shaped clamping plate (479) drives the connecting rod (478) to move into the inside of the square shell (475), and the connecting rod (478) drives the sliding plate (476) to slide inside the square shell (475), so that the airflow inside the square shell (475) enters the inside of the curved pipe (483), and the airflow enters the inside of the fixed shell (482) through the curved pipe (483), and the air pressure causes the lifting plate (484) inside the fixed shell (482) to move upward, and the lifting plate (484) drives the round rod (486) to move upward, and the round rod (486) drives the impact plate (487) to move upward, and the impact plate (487) drives the impact rod (488) to move upward, and the impact rod (488) will contact the bottom of the model bridge (3) during the upward movement; Step 4: Auxiliary test: when the lifting plate (484) moves up to the top of the inner wall of the fixed shell (482), the airflow is no longer blocked, and the airflow enters the inside of the air pipe (489). The airflow enters the inside of the arc bucket (4810) through the air pipe (489). Due to the setting of the arc bucket (4810), the airflow is diffused, thereby blowing the cable at the model bridge (3).

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