Bridge shock excitation vehicle

Abstract

The utility model relates to a bridge shock excitation vehicle, which relates to the field of engineering structure tests, and comprises a motor vehicle body and a shock excitation device, and the bridge shock excitation vehicle comprises a first vibration form and a second vibration form; the excitation device corresponding to the first vibration form comprises a first actuator, a fixed mass block and a box body, the fixed top end of the first actuator is connected with a top plate of the box body, and the movable bottom end of the first actuator is connected with the fixed mass block; the vibration excitation device corresponding to the second vibration form comprises a first actuator, a fixed mass block, a box body, a middle plate and a plurality of first springs, the fixed top end of the first actuator is connected with a top plate of the box body, the movable bottom end of the first actuator is connected with the horizontally-arranged middle plate, and the two ends of part of the first springs are connected with the fixed mass block and the middle plate respectively. Two ends of the other part of first springs are respectively connected with the fixed mass block and the box body top plate. According to the bridge vibration excitation vehicle, the problems that a traditional vibration exciter is inconvenient to move, and the vibration exciter is single in structural form and poor in universality are solved.

Description

Technical Field

[0001] The present invention relates to the field of engineering structure tests, and particularly relates to a bridge excitation vehicle. Background Art

[0002] At present, the dynamic characteristics of a structure include vibration modes, frequencies, and damping, and these characteristics are related to the mass, stiffness, and material (damping) of the structure. Accurately measuring or calculating the dynamic characteristics of a structure is crucial for structural dynamic control. The frequency in the dynamic characteristics can be measured by dynamic testing methods. The vibration mode is related to the structural damping. Therefore, damping is an important design parameter in structural dynamic analysis. If the damping of a structure can be accurately identified or measured, all dynamic characteristics can be accurately calculated. However, there are difficulties in accurately measuring the damping and its evolution law, which are often affected by multiple factors such as measurement methods, calculation methods, or the environment.

[0003] Furthermore, damping is an important design parameter in structural dynamic analysis. When designing a bridge, it is necessary to conduct a bridge damping ratio test. Most existing bridge damping ratio tests use ambient excitation and vehicle running excitation, but the excitation energy is insufficient and the results have large discreteness. For long-span and extra-long-span bridges, on-site steady-state excitation tests are the only means to accurately measure the multi-order modal damping ratio of long-span bridges, and it is very difficult to achieve on-site steady-state excitation of long-span bridges.

[0004] In related technologies, the traditional excitation scheme is to install an exciter at the position with the largest bridge amplitude. An inertial mass block is arranged inside the exciter. Under the vibration excitation of the actuator, the inertial mass block, the actuator, and the bridge resonate to achieve on-site steady-state excitation.

[0005] However, the traditional exciter is fixedly installed at the position with the largest bridge amplitude, which is inconvenient to move. Moreover, the structural form of the exciter is single, and only fixed mass blocks with relatively large masses can be used, resulting in poor general performance. Usually, corresponding fixed mass blocks need to be customized according to the structure of the bridge. Summary of the Invention

[0006] The present application provides a bridge excitation vehicle to solve the problems of inconvenient movement of the traditional exciter, single structural form of the exciter, and poor versatility.

[0007] The present application also discloses a bridge excitation vehicle, which includes a power vehicle body and an excitation device. The power vehicle body successively includes a vehicle head for providing power and a secondary hopper from front to back. The bridge excitation vehicle includes a first vibration form and a second vibration form.

[0008] The excitation device corresponding to the first vibration form includes a first actuator, a fixed mass block, and a box body. The box body is fixedly arranged on the secondary hopper. The first actuator and the fixed mass block are both accommodated in the box body. The fixed top end of the first actuator is connected to the top plate of the box body, and the movable bottom end is connected to the fixed mass block.

[0009] The excitation device corresponding to the second vibration mode includes a first actuator, a fixed mass block, a box body, an intermediate plate, and several first springs. The box body is fixedly arranged on the secondary hopper of the vehicle. The first actuator, the fixed mass block, the intermediate plate, and several first springs are all accommodated in the box body. The fixed top end of the first actuator is connected to the top plate of the box body, and the movable bottom end is connected to the horizontally arranged intermediate plate. One end of some of the first springs is respectively connected to the fixed mass block and the intermediate plate, and the other end of the other part of the first springs is respectively connected to the fixed mass block and the top plate of the box body.

[0010] Based on the above technical solution, the number of intermediate plates included in the excitation device corresponding to the second vibration mode is one, and one intermediate plate is connected to the top plate of the box body through multiple first actuators.

[0011] Based on the above technical solution, the bridge excitation vehicle further includes a primary hopper, and the front part of the secondary hopper is connected to the rear part of the primary hopper. The bridge excitation vehicle further includes a third vibration mode. The secondary hopper is disconnected from the primary hopper. The excitation device corresponding to the third vibration mode includes a movable mass member and several second actuators. Several second actuators are respectively fixedly arranged on both sides of the secondary hopper in a left-right symmetric manner. The secondary hopper and several second actuators form a vibration platform, and the movable mass member is fixed on the upper surface of the vibration platform.

[0012] Based on the above technical solution, the bridge excitation vehicle further includes a primary hopper, and the front part of the secondary hopper is connected to the rear part of the primary hopper. The excitation device further includes a fourth vibration mode. The secondary hopper is disconnected from the primary hopper. The excitation device corresponding to the fourth vibration mode includes a movable mass member, four long rod jacks, several first actuators, several second springs, and a support frame. Four long rod jacks are respectively fixedly arranged on both sides of the secondary hopper in a left-right symmetric manner. The support frame is fixedly arranged on the four long rod jacks. The top end of each first actuator is fixed to the support frame, and the bottom end is connected to the secondary hopper through a second spring. The movable mass member is fixedly arranged on the upper surface of the secondary hopper.

[0013] Based on the above technical solution, the number of first actuators and second springs included in the excitation device corresponding to the fourth vibration mode is four each, and the four first actuators are respectively arranged adjacent to the four long rod jacks.

[0014] Based on the above technical solution, the movable mass member can be a freight truck loaded with goods or a muck truck loaded with muck.

[0015] On the basis of the above technical solution, the bridge excitation vehicle further includes a first hopper, and the front part of the second hopper is connected to the rear part of the first hopper; the bridge excitation vehicle includes a control cabinet for controlling each actuator to vibrate at a set frequency, and the control cabinet is arranged on the first hopper.

[0016] On the basis of the above technical solution, the bridge excitation vehicle further includes an oil source body. All actuators are hydraulically driven, and the oil source body supplies oil to all actuators; the oil source body is arranged on the first hopper.

[0017] On the basis of the above technical solution, the bridge excitation vehicle further includes a generator, and the generator supplies power to all actuators; the generator is arranged on the first hopper.

[0018] On the basis of the above technical solution, the control cabinet is connected to the generator through wires, and the generator is connected to all actuators through wires.

[0019] The beneficial effects brought by the technical solution provided by the embodiment of the present application at least include:

[0020] 1. For the bridge excitation vehicle of the present application, it excites the vibration of the main beam of a long-span bridge, arranges the bridge excitation vehicle at the position of the maximum vibration mode value, and uses the resonance principle to continuously increase the vibration amplitude of a specific mode of the main beam, so as to truly measure the dynamic characteristics of the long-span bridge; the bridge excitation vehicle of the present application has a power vehicle body, which enhances the mobility of the bridge excitation vehicle and is convenient to move the excitation device to the position with the maximum amplitude of the bridge. When moving over a long distance, the excitation device can be moved to the designated excitation position, which is safe, convenient and efficient.

[0021] 2. The bridge excitation vehicle of the present application has a first vibration mode and a second vibration mode. In the first vibration mode, the strokes of the first actuator and the fixed mass block are the same; in the second vibration mode, through the intermediate plate and the connecting first spring, the amplitude can be amplified, and the strokes of the first actuator and the fixed mass block are different; in the actual use process, the first actuator 11 with a small tonnage and a small stroke can be used to excite through the two-stage resonance (corresponding to the second vibration mode) principle, or the first actuator 11 with a large tonnage and a large stroke can be used to excite through the first-stage resonance (corresponding to the first vibration mode) principle. The bridge excitation vehicle of the present application can switch different modes according to actual needs, has a variable structural form, strong versatility and a wide application range.

[0022] 3. The bridge excitation vehicle of the present application has a third vibration mode. It ingeniously uses a secondary hopper and several second actuators as a vibration platform, and the movable mass member is fixed on the upper surface of the vibration platform. The movable mass member can be increased or decreased according to the mass required for excitation, and the mass arrangement form is flexible. It can be made into a fixed mass block or a movable mass member. The inertial mass required for excitation can be found locally according to the location of the bridge site, and the inertial mass can be determined according to the size of the bridge to excite bridges of different scales. It is flexible, convenient and low-cost, no longer limited to fixed mass blocks, saving the cost of customizing fixed mass blocks, and is flexible and convenient to use the movable mass member.

[0023] 4. The bridge excitation vehicle of the present application has a fourth vibration mode. The support frame and four long rod jacks are used as a support platform to suspend the movable mass member and the secondary hopper. The movable mass member can be increased or decreased according to the mass required for excitation. Each first actuator is fixed to the support frame, and the bottom end is connected to the secondary hopper through a second spring to amplify the amplitude of the excitation device through secondary vibration. It is no longer limited to fixed mass blocks, saving the cost of customizing fixed mass blocks, and is flexible and convenient to use the movable mass member. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0025] Figure 1 It is a schematic structural diagram of the bridge excitation vehicle provided by the embodiment of the present application (the bridge excitation vehicle is in the second vibration mode);

[0026] Figure 2 It is a schematic structural diagram of the excitation device corresponding to the bridge excitation vehicle in the first vibration mode provided by the embodiment of the present application;

[0027] Figure 3 It is a schematic structural diagram of the excitation device corresponding to the bridge excitation vehicle in the second vibration mode provided by the embodiment of the present application;

[0028] Figure 4 It is a schematic structural diagram of the excitation device corresponding to the bridge excitation vehicle in the third vibration mode provided by the embodiment of the present application;

[0029] Figure 5 For Figure 4 the left view;

[0030] Figure 6 It is a schematic structural diagram of the excitation device corresponding to the bridge excitation vehicle in the fourth vibration mode provided by the embodiment of the present application;

[0031] Figure 7 is Figure 6 the left view of;

[0032] In the figure: 100, the vehicle head; 101, the first-level hopper; 102, the second-level hopper; 1, the vibration excitation device; 10, the box body; 11, the first actuator; 12, the first spring; 13, the fixed mass block; 14, the intermediate plate; 15, the movable mass member; 16, the support frame; 17, the second actuator; 18, the long rod jack; 19, the second spring; 2, the oil source body; 3, the generator; 4, the control cabinet. Specific embodiments

[0033] In order to enable those skilled in the art of the present technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0034] The embodiment of this application provides a bridge vibration excitation vehicle, which can solve the problems of inconvenient movement of traditional vibration exciters, single structure form of vibration exciters, and poor versatility.

[0035] As Figures 1 to 7 shown, the embodiment of a bridge vibration excitation vehicle disclosed in this application includes a power vehicle body and a vibration excitation device 1.

[0036] The power vehicle body successively includes a vehicle head 100, a first-level hopper 101, and a second-level hopper 102 from front to back. The vehicle head 100 is used to provide power to drive the first-level hopper 101 and the second-level hopper 102 to move, enhancing the movement convenience of the bridge vibration excitation vehicle and facilitating movement to the position with the maximum amplitude of the bridge. The power vehicle body provides power for the bridge vibration excitation vehicle. When moving over a long distance, the vibration excitation device 1 can be moved to the specified vibration excitation position, which is safe, convenient, and efficient.

[0037] The bridge vibration excitation vehicle includes a first vibration form and a second vibration form, and the vibration excitation devices 1 corresponding to the first vibration form and the second vibration form are both installed above the second-level hopper 102.

[0038] The vibration excitation device 1 corresponding to the first vibration form includes a first actuator 11, a fixed mass block 13, and a box body 10. The box body 10 is fixedly arranged on the second-level hopper 102. The first actuator 11 and the fixed mass block 13 are both accommodated in the box body 10. The fixed top end of the first actuator 11 is connected to the top plate of the box body 10, and the movable bottom end is connected to the fixed mass block 13.

[0039] In the first vibration mode, the first actuator 11 can input stable excitation energy to the bridge. The first actuator 11 directly excites the fixed mass block 13. The vibration information such as the frequency, amplitude, and phase of the fixed mass block 13 is consistent with that of the first actuator 11, causing the fixed mass block 13 to vibrate at a specific frequency and keeping the vibration frequency of the fixed mass block 13 unchanged. Then, gradually increase the vibration amplitude of the fixed mass block 13. Using the resonance principle, excite the vibration of a certain frequency of the main girder.

[0040] The excitation device 1 corresponding to the second vibration mode includes a first actuator 11, a fixed mass block 13, a box body 10, an intermediate plate 14, and several first springs 12. The box body 10 is fixedly arranged on the secondary hopper 102. The first actuator 11, the fixed mass block 13, the intermediate plate 14, and several first springs 12 are all accommodated in the box body 10. The fixed top end of the first actuator 11 is connected to the top plate of the box body 10, and the movable bottom end of the first actuator 11 is connected to the horizontally arranged intermediate plate 14. All the first springs 12 are vertically arranged. One end of some first springs 12 is respectively connected to the fixed mass block 13 and the intermediate plate 14, and the other end of the other part of the first springs 12 is respectively connected to the fixed mass block 13 and the top plate of the box body 10.

[0041] When the bridge excitation vehicle is in the second vibration mode, the first actuator 11 and the fixed mass block 13 are connected through the first springs 12 and the intermediate plate 14. The vibration information such as the amplitude and phase of the fixed mass block 13 is inconsistent with that of the first actuator 11. The intermediate plate 14 and the first springs 12 connected thereto amplify the amplitude. The first actuator 11 excites the amplitude and frequency of the fixed mass block 13 to the specified values through resonance, achieving the first-level resonance. At the same time, the fixed mass block 13 and the first actuator 11, as a whole, excite the vibration mode of a specific frequency of the main girder, achieving the second-level resonance, and achieving the purpose of amplifying the amplitude of the main girder.

[0042] The bridge excitation vehicle of the present application has a power vehicle body, which enhances the mobility of the bridge excitation vehicle, facilitating the movement of the excitation device 1 to the position with the maximum amplitude of the bridge. When moving over a long distance, the excitation device 1 can be moved to the specified excitation position, which is safe, convenient, and efficient. The bridge excitation vehicle of the present application has a first vibration mode and a second vibration mode. In the first vibration mode, the strokes of the first actuator 11 and the fixed mass block 13 are the same. In the second vibration mode, through the intermediate plate 14 and the connected first springs 12, the amplitude can be amplified, and the strokes of the first actuator 11 and the fixed mass block 13 are different. The bridge excitation vehicle of the present application can switch different modes according to actual needs, with a wide application range and strong practicability.

[0043] Specifically, during actual use, when a certain bridge requires a steady-state excitation source, it can be excited by the first actuator 11 with a small tonnage and small stroke through the principle of two-stage resonance (corresponding to the second vibration mode), or it can also be excited by the first actuator 11 with a large tonnage and large stroke through the principle of one-stage resonance (corresponding to the first vibration mode).

[0044] In one embodiment, the number of intermediate plates 14 included in the excitation device 1 corresponding to the second vibration mode is one. One intermediate plate 14 is connected to the top plate of the box body 10 through a plurality of first actuators 11.

[0045] In one embodiment, the bridge excitation vehicle further includes a first-stage hopper 101, and the front part of the second-stage hopper 102 is connected to the rear part of the first-stage hopper 101. The bridge excitation vehicle further includes a third vibration mode, in which the second-stage hopper 102 is disconnected from the first-stage hopper 101. The excitation device 1 of the third vibration mode includes a movable mass member 15 and a plurality of second actuators 17. The plurality of second actuators 17 are respectively symmetrically fixed on both sides of the second-stage hopper 102; the second-stage hopper 102 and the plurality of second actuators 17 form a vibration platform, and the movable mass member 15 is fixed on the upper surface of the vibration platform.

[0046] The bridge excitation vehicle of the present application has a third vibration mode, and cleverly uses the second-stage hopper 102 and a plurality of second actuators 17 as a vibration platform, and the movable mass member 15 is fixed on the upper surface of the vibration platform; the movable mass member 15 can be increased or decreased according to the mass required for excitation, and different mass excitation vehicles can be formed according to the combination, no longer limited to fixed mass blocks, saving the cost of customizing fixed mass blocks, and the use of the movable mass member 15 is flexible and convenient.

[0047] In one embodiment, the bridge excitation vehicle further includes a first-stage hopper 101, and the front part of the second-stage hopper 102 is connected to the rear part of the first-stage hopper 101. The excitation device 1 further includes a fourth vibration mode, in which the second-stage hopper 102 is disconnected from the first-stage hopper 101. The excitation device 1 corresponding to the fourth vibration mode includes a movable mass member 15, four long rod jacks 18, a plurality of first actuators 11, a plurality of second springs 19 and a support frame 16.

[0048] The four long rod jacks 18 are respectively symmetrically fixed on both sides of the second-stage hopper 102, and the support frame 16 is horizontally fixed on the four long rod jacks 18. Each first actuator 11 is fixed on the support frame 16, and the bottom end is connected to the second-stage hopper 102 through a second spring 19. The movable mass member 15 is fixed on the upper surface of the second-stage hopper 102. Specifically, the space between the support frame 16 and the bridge deck can accommodate the second-stage hopper 102, the movable mass member 15, the first actuator 11 and the second spring 19 and vibrate.

[0049] The bridge excitation vehicle of the present application has a fourth vibration mode. The support frame 16 and four long rod jacks 18 serve as the support platform, suspending the movable mass member 15 and the secondary hopper 102. The movable mass member 15 can be increased or decreased according to the mass required for excitation. Each first actuator 11 is fixed to the support frame 16, and the bottom end is connected to the secondary hopper 102 through the second spring 19, amplifying the amplitude of the excitation through secondary vibration, no longer limited to fixed mass blocks, saving the cost of customizing fixed mass blocks, and using the movable mass member 15 is flexible and convenient. At the same time, the secondary vibration enables the bridge excitation vehicle to be applicable to large amplitudes of super-large bridges.

[0050] Further, the number of the first actuators 11 and the second springs 19 included in the excitation device 1 corresponding to the fourth vibration mode are both four, and the four first actuators 11 are respectively arranged adjacent to the four long rod jacks 18.

[0051] Further, the movable mass member 15 can be a freight truck loaded with goods or a muck truck loaded with muck.

[0052] Specifically, the movable mass member 15 can determine the inertial mass according to the size of the bridge.

[0053] In one embodiment, the bridge excitation vehicle further includes a primary hopper 101, and the front part of the secondary hopper 102 is connected to the rear part of the primary hopper 101. The bridge excitation vehicle includes a control cabinet 4 for controlling each actuator to vibrate at a set frequency, and the control cabinet 4 is arranged on the primary hopper 101.

[0054] The control cabinet 4 is connected to all the actuators through signal lines.

[0055] In one embodiment, the bridge excitation vehicle further includes an oil source body 2, all the actuators are hydraulically driven, and the oil source body 2 supplies oil to all the actuators; the oil source body 2 is arranged on the primary hopper 101. The oil source body 2 is connected to all the actuators through oil pipes.

[0056] In one embodiment, the bridge excitation vehicle further includes a generator 3, the generator 3 supplies power to all the actuators, and the generator 3 is fixedly arranged on the primary hopper 101.

[0057] The bridge excitation vehicle of the present application has a flexible excitation drive form, and can be excited by electric actuators or hydraulic actuators.

[0058] In one embodiment, the control cabinet 4 is connected to the generator 3 through wires, and the generator 3 is connected to all the actuators through wires.

[0059] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0060] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0061] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A bridge vibration vehicle, characterized in that: It comprises a power vehicle body and a vibration excitation device (1), wherein the power vehicle body comprises, from front to rear, a vehicle head (100) for providing power and a secondary vehicle bucket (102); the bridge vibration excitation vehicle comprises a first vibration mode and a second vibration mode; The excitation device (1) corresponding to the first vibration mode comprises a first actuator (11), a fixed mass block (13) and a box (10), wherein the box (10) is fixedly arranged on the secondary truck bucket (102), and the first actuator (11) and the fixed mass block (13) are both accommodated in the box (10); the fixed top end of the first actuator (11) is connected to the top plate of the box (10), and the movable bottom end is connected to the fixed mass block (13); The excitation device (1) corresponding to the second vibration mode comprises a first actuator (11), a fixed mass block (13), a box (10), an intermediate plate (14) and a plurality of first springs (12); the box (10) is fixedly arranged on the secondary truck bucket (102); the first actuator (11), the fixed mass block (13), the intermediate plate (14) and the plurality of first springs (12) are all accommodated in the box (10); the fixed top end of the first actuator (11) is connected to the top plate of the box (10), and the movable bottom end is connected to the horizontally arranged intermediate plate (14); the two ends of a part of the first springs (12) are respectively connected to the fixed mass block (13) and the intermediate plate (14); and the two ends of another part of the first springs (12) are respectively connected to the fixed mass block (13) and the top plate of the box (10).

2. A bridge vibration vehicle as claimed in claim 1, characterized in that: The excitation device (1) corresponding to the second vibration mode comprises one intermediate plate (14), and one intermediate plate (14) is connected to the top plate of the box body (10) via a plurality of first actuators (11).

3. A bridge vibration vehicle as claimed in claim 1, characterized in that: The bridge vibration vehicle also includes a first-stage vehicle bucket (101), and the front part of the second-stage vehicle bucket (102) is connected to the rear part of the first-stage vehicle bucket (101); the bridge vibration vehicle also includes a third vibration mode, and the second-stage vehicle bucket (102) is disconnected from the first-stage vehicle bucket (101); the vibration device (1) corresponding to the third vibration mode includes a movable mass part (15) and a plurality of second actuators (17), and the plurality of second actuators (17) are respectively and symmetrically fixedly arranged on both sides of the second-stage vehicle bucket (102); the second-stage vehicle bucket (102) and the plurality of second actuators (17) form a vibration platform, and the movable mass part (15) is fixed on the upper surface of the vibration platform.

4. A bridge vibration vehicle as claimed in claim 1, characterized in that: The bridge vibration vehicle further comprises a first-stage vehicle bucket (101), the front portion of the second-stage vehicle bucket (102) being connected to the rear portion of the first-stage vehicle bucket (101); the vibration device (1) further comprises a fourth vibration mode, the second-stage vehicle bucket (102) being disconnected from the first-stage vehicle bucket (101), and the vibration device (1) corresponding to the fourth vibration mode comprises a movable mass member (15), four long-rod jacks (18), a plurality of first actuators (11), a plurality of second springs (19) and a support frame (16); Four long-rod jacks (18) are respectively and symmetrically fixed on both sides of the secondary truck bucket (102), and the support frame (16) is horizontally fixed on the four long-rod jacks (18); the top end of each of the first actuators (11) is fixed to the support frame (16), and the bottom end is connected to the secondary truck bucket (102) through a second spring (19); the movable mass member (15) is fixed on the upper surface of the secondary truck bucket (102).

5. A bridge vibration vehicle as claimed in claim 4, characterized in that: The vibration excitation device (1) corresponding to the fourth vibration mode comprises four first actuators (11) and four second springs (19), and the four first actuators (11) are respectively arranged adjacent to the four long rod jacks (18).

6. A bridge vibration vehicle as claimed in claim 3 or 4, characterized in that: The movable mass part (15) can be a truck loaded with goods or a slag truck loaded with slag.

7. A bridge vibration vehicle as claimed in claim 1, characterized in that: The bridge vibration vehicle further comprises a first-stage vehicle bucket (101), the front portion of the second-stage vehicle bucket (102) being connected to the rear portion of the first-stage vehicle bucket (101); the bridge vibration vehicle comprises a control cabinet (4) for controlling each actuator to vibrate according to a set frequency, the control cabinet (4) being arranged on the first-stage vehicle bucket (101).

8. A bridge vibration vehicle as claimed in claim 7, characterized in that: The bridge vibration vehicle further comprises an oil source body (2); all actuators are hydraulically driven, and the oil source body (2) supplies oil to all actuators; the oil source body (2) is arranged in the first-stage vehicle bucket (101).

9. A bridge vibration vehicle as claimed in claim 8, characterized in that: The bridge vibration vehicle further comprises a generator (3), and the generator (3) supplies power to all actuators; the generator (3) is arranged in the first-stage vehicle bucket (101).

10. A bridge vibration vehicle as claimed in claim 9, characterized in that: The control cabinet (4) is connected to the generator (3) via electric wires, and the generator (3) is connected to all actuators via electric wires.

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