Three-degree-of-freedom active wing plate device for controlling multi-mode coupling flutter and bridge box girder
A degree of freedom and multi-mode technology, applied in the direction of bridges, bridge construction, bridge parts, etc., can solve problems such as the inability to achieve effective control of multi-mode coupling flutter, and achieve strong practical effects
Active Publication Date: 2021-08-10
CHONGQING UNIV
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Problems solved by technology
The mechanism for improving the flutter stability of bridges can only control the rotation of the flaps, that is, it can only deal with the flutter problems dominated by torsional modes, and cannot achieve effective control of multi-mode coupled flutter
Method used
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.
[0031] Such as figure 1 Shown is a schematic structural view of a bridge box girder embodiment of the present invention. The bridge box girder of this embodiment includes a main girder 1, on which a three-degree-of-freedom active wing plate device for controlling multi-mode coupling flutter is installed. The main girder 1 of this embodiment includes a shell, and the shell is composed of an upper shell and a lower shell. The main beam 1 is provided with transverse reinforcement brackets 19 at intervals, and the middle part of the main beam 1 is provided with a longitudinal reinforcement bracket 20 to improve the structural rigidity of the main beam 1 .
[0032] Specifically, the ...
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;The invention discloses a three-degree-of-freedom active wing plate device for controlling multi-mode coupling flutter. The device comprises active wing plates located on the two sides of a main beam, and a wing plate connecting mechanism used for being connected with the two active wing plates is arranged in the main beam the wing plate connecting mechanism comprises a transmission shaft arranged in the main beam, a first support rotating synchronously with the transmission shaft is arranged on the transmission shaft, a sliding seat is arranged on the first support, a sliding rail in single-degree-of-freedom sliding fit with the sliding seat is arranged on the sliding seat, and one end of the sliding rail is hinged to the corresponding driving wing plate; a wing plate height position adjusting mechanism which is used for driving the transmission shaft to rotate so as to adjust the height position of the corresponding driving wing plate is arranged in the main beam; the first support is provided with a wing plate horizontal position adjusting mechanism used for driving the sliding rail to move relative to the sliding base so as to adjust the horizontal position of the corresponding driving wing plate; and a second support is arranged on a sliding rail, and a wing plate posture adjusting mechanism used for adjusting the angle posture of the corresponding driving wing plate is arranged on the second support. The invention further discloses a bridge box girder.
Description
technical field [0001] The invention belongs to the technical field of bridges, in particular to a three-degree-of-freedom active wing plate device and a bridge box girder for controlling multi-mode coupling flutter. Background technique [0002] Super-long-span bridges are an important part of cross-sea and island-connecting projects, and ensuring their structural safety is a prerequisite for construction. However, the super-long-span bridge structure itself has low stiffness and is located in an offshore high-wind area. How to avoid bridge damage due to flutter during its life cycle has become the focus and difficulty of design. Most of the existing active wing plate experimental devices can only actively adjust the angle of the wing plate, but cannot change the position of the wing plate, lack flexibility in practical application, and cannot effectively deal with the multi-mode coupling flutter problem of super long-span bridges. [0003] Specifically, the ultra-long-spa...
Claims
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IPC IPC(8): E01D2/04E01D19/00
CPCE01D2/04E01D19/00Y02T50/10
Inventor 李珂赵林葛耀君王先猛王子龙张秋雨
Owner CHONGQING UNIV