Cantilever vibration multi-frequency control shock absorber for bridge structure water transportation

Abstract

The invention provides a cantilever vibration multi-frequency control shock absorber for bridge structure water transportation, which comprises a mixed shock absorption device, a motor, a connecting seat I and a connecting seat II, and is characterized in that the mixed shock absorption device comprises an inclined strut type damper and a gyroscope shock absorption device; the diagonal bracing type damper comprises a damping guide rod, a cylindrical piston, a damping cylinder body and a high-strength sealing cover, the gyroscope vibration reduction device comprises a gyroscope, a gyroscope sleeve shell and a gyroscope rotating rod, and the first connecting base and the second connecting base each comprise a connecting rod and a bolt hole. The device has the beneficial effects that the low-frequency longitudinal vibration of the cantilever end of the bridge structure is covered through the inclined strut type viscous damper, the high-frequency multi-directional vibration of the cantilever end of the bridge structure is restrained through the gyroscope damping device, and the stability of the cantilever end of the bridge structure for water transportation is improved; the vibration damage of the cantilever end of the bridge structure due to the influence of stormy waves when the bridge structure is transported on water is solved.

Description

Technical Field

[0001] The invention belongs to the field of bridge structure vibration reduction in civil engineering, and in particular relates to a cantilever multi-frequency controlled vibration absorber used for water transportation of bridge structures. Background Art

[0002] Floating construction, a primary method of bridge construction, is subject to dynamic loads such as wind and waves during water transport, which can easily induce cantilever vibration in bridge structures. When the vibration amplitude exceeds a critical value, it not only significantly reduces structural stability but also compromises construction safety and structural integrity. Current engineering practices primarily employ dampers to suppress cantilever vibration responses, with tuned mass dampers (TMDs) and viscous dampers being the most widely used.

[0003] Tuned mass dampers, consisting of a mass-spring-damper system, offer the advantages of easy installation and maintenance, and minimal structural disturbance. However, their frequency sensitivity means that a single device can only control specific vibration orders, and multimodal vibration requires the coordinated operation of multiple devices. Viscous dampers, on the other hand, dissipate energy through the viscous effect of liquids. They feature a simple structure and outstanding reliability, and have been highly successful in the fields of buildings, bridges, and mechanical equipment, particularly in controlling low-frequency vibrations. However, viscous dampers have limitations in their frequency response. Specifically, the linear relationship between damping force and velocity results in insufficient response at high frequencies, while excessive damping force at low frequencies can hinder structural deformation. This uneven frequency response restricts their application in broadband vibration environments. This is particularly true for bridge structures used in water transportation, where complex and variable hydrological and meteorological conditions often result in wide-band, multimodally coupled wind and wave excitations. However, these damping devices generally suffer from a narrow frequency range and weak multimodal control capabilities. Especially when encountering the combined effects of typhoon surges and normal waves, these traditional damping devices struggle to achieve effective control across the entire frequency range, which can easily lead to structural resonance risks. Therefore, developing a new damping system with broadband adaptive characteristics has become a key technical challenge in ensuring the safety of large bridge structures in water transportation. Summary of the Invention

[0004] In view of this, the present invention aims to propose a cantilever multi-frequency controlled shock absorber for water transportation of bridge structures to solve the problem that traditional viscous dampers cannot quickly and effectively dissipate harmful energy under extreme vibration conditions.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures, comprising a hybrid vibration reduction device, a motor, a first connecting seat and a second connecting seat;

[0007] The first connecting seat and the second connecting seat both include connecting rods, and the first connecting seat and the second connecting seat both have bolt holes;

[0008] The hybrid vibration reduction device includes a diagonal damper and a gyro vibration reduction device, and the two are connected;

[0009] The diagonal brace damper includes a damping guide rod, a cylindrical piston, a damping cylinder and a high-strength sealing cover. The damping guide rod is provided with a connecting hole 1, and the connecting hole 1 is penetrated by a connecting rod of a connecting seat 1. The damping guide rod penetrates the cylindrical piston. The cylindrical piston is located inside the damping cylinder and inscribed in the damping cylinder. A high-strength sealing cover is installed on the inner side of the bottom end of the damping cylinder.

[0010] The gyro vibration reduction device includes a gyroscope, a gyroscope casing and a gyroscope rotating rod. The gyroscope is located inside the gyroscope casing, and both are penetrated by the gyroscope rotating rod.

[0011] The motor is installed on the side of the gyro vibration reduction device, and the bottom of the gyro vibration reduction device is connected to the second connecting seat through the second connecting hole.

[0012] Furthermore, the cylindrical piston is provided with a damping hole.

[0013] Furthermore, the interior of the damping cylinder is filled with damping medium.

[0014] Furthermore, the first connecting seat is connected to the bridge body bolts through bolt holes, and the second connecting seat is connected to the hull bolts through bolt holes.

[0015] Furthermore, a rotation hole is provided in the middle of the gyroscope, and sleeve holes are provided on the top and bottom of the gyroscope casing, and the rotation hole and the sleeve hole are both penetrated by the gyroscope rotating rod.

[0016] Furthermore, a driving base is installed at the bottom end of the gyro rotating rod, and two constraint bearings pass through the middle of the gyro rotating rod. The two constraint bearings are respectively arranged at the top and bottom of the gyroscope.

[0017] Furthermore, a knob and a button are installed on the side of the motor.

[0018] Furthermore, the output end of the motor is connected to the driving base;

[0019] Furthermore, bolt hole one, bolt hole two, bolt hole three and bolt hole four are provided on one side of the bottom of connecting seat one and connecting seat two, and bolt hole five, bolt hole six, bolt hole seven and bolt hole eight are provided on the other side of the bottom of connecting seat one and connecting seat two.

[0020] Compared with the prior art, the cantilever multi-frequency controlled shock absorber for water transportation of bridge structures described in the present invention has the following beneficial effects:

[0021] (1) A cantilever multi-frequency controlled vibration damper for water transportation of bridge structures retains the advantages of the diagonal brace viscous damper, inheriting the advantages of the diagonal brace viscous damper in easy installation and low cost. When low-frequency vibration occurs in the cantilever section of the bridge, the diagonal brace viscous damper can effectively exert its vibration reduction advantages.

[0022] (2) A cantilever multi-frequency controlled shock absorber for water transportation of bridge structures, which uses the gyro principle and adopts a high-speed gyro shock absorber to make up for the defect that the diagonal brace viscous damper cannot exert the vibration reduction effect under high-frequency vibration conditions.

[0023] (3) A cantilever multi-frequency controlled shock absorber for water transportation of bridge structures, which facilitates the arrangement of the shock absorber by setting a longitudinally rotatable connecting seat, is simple and quick to operate, improves the convenience of the device, reduces labor intensity, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 A schematic diagram of a device according to an embodiment of the present invention;

[0026] Figure 2 A cross-sectional view of a device according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of a connecting socket according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a damping guide rod according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the damping cylinder-motor connection according to an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of a gyroscope according to an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of a gyro rod according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of a gyroscope housing according to an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Hybrid vibration reduction device; 2. Diagonal brace damper; 3. Gyro vibration reduction device; 4. Connecting seat 1; 41. Connecting rod; 42. Bolt hole 1; 43. Bolt hole 2; 44. Bolt hole 3; 45. Bolt hole 4; 46. Bolt hole 5; 47. Bolt hole 6; 48. Bolt hole 7; 49. Bolt hole 8; 5. Damping guide rod; 51. Connecting hole 1; 6. Cylindrical piston; 61. Damping hole; 7. Damping cylinder; 8. High-strength sealing cover; 9. Gyroscope; 91. Rotating hole; 10. Gyroscope casing; 101. Casing hole; 11. Gyroscope rotating rod; 111. Driving base; 112. Constraint bearing; 12. Motor; 121. Knob; 122. Push button; 123. Connecting hole 2; 13. Connecting seat 2. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0039] like Figures 1 to 8 As shown, a cantilever multi-frequency controlled vibration absorber for water transportation of bridge structures includes a hybrid vibration damping device 1, a motor 12, a connecting seat 1 4 and a connecting seat 2 13;

[0040] The connecting seat 1 4 and the connecting seat 2 13 both include a connecting rod 41, and the connecting seat 1 4 and the connecting seat 2 13 both have bolt holes;

[0041] The hybrid vibration reduction device 1 includes a diagonal damper 2 and a gyro vibration reduction device 3, and the two are connected;

[0042] The diagonal brace damper 2 includes a damping guide rod 5, a cylindrical piston 6, a damping cylinder 7 and a high-strength sealing cover 8;

[0043] The gyro vibration reduction device 3 includes a gyroscope 9, a gyroscope housing 10 and a gyroscope rod 11;

[0044] The motor 12 is installed on the side of the gyro vibration reduction device 3, and the bottom thereof is connected to the second connecting seat 13 through the second connecting hole 123.

[0045] The specific implementation is as follows:

[0046] In a preferred embodiment of the present invention, the damping guide rod 5 defines a connecting hole 51, which is penetrated by the connecting rod 41 of the connecting seat 4. The damping guide rod 5 penetrates the cylindrical piston 6, which is located inside the damping cylinder 7 and inscribed in the damping cylinder 7. A high-strength sealing cover 8 is installed on the inner side of the bottom end of the damping cylinder 7, and the cylindrical piston 6 defines a damping hole 61. The interior of the damping cylinder 7 is filled with a damping medium. In this embodiment, the damping guide rod 5 performs piston motion inside the damping cylinder 7. During the reciprocating motion of the cylindrical piston 6, the damping medium inside the damping cylinder 7 passes through the damping hole 61 of the cylindrical piston 6, thereby consuming kinetic energy and suppressing vibration. The high-strength sealing cover 8 is used to limit the downward movement of the damping guide rod 5 to an extreme position.

[0047] In a preferred embodiment of the present invention, the gyroscope 9 is located inside the gyroscope casing 10, and both are penetrated by the gyroscope rod 11. The connecting seat 14 is connected to the bridge body bolts through bolt holes, and the connecting seat 2 13 is connected to the hull bolts through bolt holes. A rotating hole 91 is provided in the middle of the gyroscope 9, and a sleeve hole 101 is provided at the top and bottom of the gyroscope casing 10. The rotating hole 91 and the sleeve hole 101 are both penetrated by the gyroscope rod 11. A driving base 111 is installed at the bottom end of the gyroscope rod 11, and two constraint bearings 112 are penetrated in the middle of the gyroscope rod 11. The two constraint bearings 112 are respectively arranged at the top and bottom of the gyroscope 9. A knob 121 and a button 122 are installed on the side of the motor 12. The output end of the motor 12 is connected to the driving base 111. Bolt holes 1, 42, 43, 3, 44, and 45 are defined on one side of the bottom of each of the connectors 1 (4) and 2 (13). Bolt holes 5, 46, 6, 47, 7, 48, and 8, 49 are also defined on the other side of the bottom of each of the connectors 1 (4) and 2 (13). In this embodiment, the longitudinally rotatable connector 1 (4) is bolted to the bridge structure, while the longitudinally rotatable connector 2 (13) is bolted to the ship hull. The diagonal brace damper 2 is laterally constrained by the longitudinally rotatable connector 1 (4), while the gyroscopic vibration reduction device 3 is laterally constrained by the longitudinally rotatable connector 2 (13). The motor 12 drives the gyroscopic rotating rod 11 to rotate at high speed, thereby driving the gyroscopic vibration reduction device 3 to rotate at high speed. The rotation speed of the gyroscopic vibration reduction device 9 is controlled by a knob 121, while the gyroscopic vibration reduction device 3 is turned on and off by a button 122. The diagonal brace damper 2 suppresses low-frequency longitudinal vibrations at the cantilever end of the bridge structure, while the gyroscopic vibration reduction device 3 suppresses high-frequency multi-directional vibrations at the cantilever end of the bridge structure.

[0048] Example 1:

[0049] A cantilever multi-frequency controlled shock absorber for water transportation of bridge structures. When in use, a longitudinally rotatable connecting seat 1 (4) is bolted to the bridge body, a longitudinally rotatable connecting seat 2 (13) is bolted to the hull, a diagonal damper 2 is laterally constrained by the longitudinally rotatable connecting seat 1 (4), a gyroscopic vibration reduction device 3 is laterally constrained by the longitudinally rotatable connecting seat 2 (13), a damping guide rod 5 performs piston motion inside the damping cylinder 7, and during the reciprocating motion of the cylindrical piston 6, the damping medium inside the damping cylinder 7 passes through the damping hole 61 of the cylindrical piston 6, thereby consuming kinetic energy and suppressing vibration. The motor 12 drives the gyroscopic rod. 11 rotates at high speed, thereby driving the gyroscope 9 to rotate at high speed, the rotation speed of the gyroscope 9 is controlled by the knob 121, and the opening and closing of the gyro vibration reduction device 3 is controlled by the button 122. The low-frequency longitudinal vibration of the cantilever end of the bridge structure is covered by the diagonal brace viscous damper, and the advantages of easy installation and low cost of the original damping device are maintained. At the same time, the gyroscope vibration reduction device 3 is combined with the diagonal brace viscous damper, and the lateral reaction torque generated by the high-speed rotating gyroscope 9 is used to resist the high-frequency vibration positive torque generated by the strong wind and waves when the bridge structure is transported on water, thereby achieving the effect of high-frequency vibration reduction, thereby improving the functionality and versatility of the entire vibration reduction device.

[0050] Advantages and beneficial effects of the present invention:

[0051] (1) A cantilever multi-frequency controlled vibration damper for water transportation of bridge structures retains the advantages of the diagonal brace viscous damper, inheriting the advantages of the diagonal brace viscous damper in easy installation and low cost. When low-frequency vibration occurs in the cantilever section of the bridge, the diagonal brace viscous damper can effectively exert its vibration reduction advantages.

[0052] (2) A cantilever multi-frequency controlled shock absorber for water transportation of bridge structures, which uses the gyro principle and adopts a high-speed gyro shock absorber to make up for the defect that the diagonal brace viscous damper cannot exert the vibration reduction effect under high-frequency vibration conditions.

[0053] (3) A cantilever multi-frequency controlled shock absorber for water transportation of bridge structures, which facilitates the arrangement of the shock absorber by setting a longitudinally rotatable connecting seat, is simple and quick to operate, improves the convenience of the device, reduces labor intensity, and improves work efficiency.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-frequency controlled vibration absorber for cantilever vibration of bridge structures for water transportation, characterized by: It comprises a hybrid vibration reduction device (1), a motor (12), a first connecting seat (4) and a second connecting seat (13); The connecting seat 1 (4) and the connecting seat 2 (13) both include a connecting rod (41), and the connecting seat 1 (4) and the connecting seat 2 (13) both have bolt holes; The hybrid vibration reduction device (1) comprises a diagonal damper (2) and a gyro vibration reduction device (3), and the two are connected; The diagonal brace damper (2) comprises a damping guide rod (5), a cylindrical piston (6), a damping cylinder (7) and a high-strength sealing cover (8); the damping guide rod (5) is provided with a connecting hole (51); the connecting hole (51) is penetrated by a connecting rod (41) of a connecting seat (4); the damping guide rod (5) penetrates the cylindrical piston (6); the cylindrical piston (6) is located inside the damping cylinder (7) and is inscribed in the damping cylinder (7); and a high-strength sealing cover (8) is installed on the inner side of the bottom end of the damping cylinder (7); The gyro vibration reduction device (3) comprises a gyroscope (9), a gyroscope casing (10) and a gyroscope rotating rod (11); the gyroscope (9) is located inside the gyroscope casing (10), and both are penetrated by the gyroscope rotating rod (11); The motor (12) is installed on the side of the gyro vibration reduction device (3), and the bottom thereof is connected to the second connecting seat (13) through the second connecting hole (123).

2. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 1 is characterized in that: The cylindrical piston (6) is provided with a damping hole (61).

3. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 1 is characterized in that: The interior of the damping cylinder (7) is filled with damping medium.

4. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 1 is characterized in that: The first connecting seat (4) is connected to the bridge body by bolts through bolt holes, and the second connecting seat (13) is connected to the hull by bolts through bolt holes.

5. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 1 is characterized in that: A rotation hole (91) is provided in the middle of the gyroscope (9), and sleeve holes (101) are provided on the top and bottom of the gyroscope casing (10). The rotation hole (91) and the sleeve holes (101) are both penetrated by the gyroscope rotating rod (11).

6. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 1 is characterized in that: A driving base (111) is installed at the bottom end of the gyro rod (11), and two constraint bearings (112) pass through the middle of the gyro rod (11). The two constraint bearings (112) are respectively arranged at the top and bottom of the gyroscope (9).

7. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 1 is characterized in that: A knob (121) and a button (122) are installed on the side of the motor (12).

8. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 6, characterized in that: The output end of the motor (12) is connected to the driving base (111).

9. The cantilever vibration multi-frequency control shock absorber for water transportation of bridge structures according to claim 4, characterized in that: The bottom side of the connecting seat 1 (4) and the connecting seat 2 (13) is provided with a bolt hole 1 (42), a bolt hole 2 (43), a bolt hole 3 (44) and a bolt hole 4 (45), and the bottom side of the connecting seat 1 (4) and the connecting seat 2 (13) is provided with a bolt hole 5 (46), a bolt hole 6 (47), a bolt hole 7 (48) and a bolt hole 8 (49).

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