A bionics-based pneumatic drag reduction device and bridge

A drag reduction device and bionics technology, applied in bridges, bridge construction, bridge parts, etc., can solve problems such as poor technical effect and poor universality, and achieve the goal of eliminating mechanical control devices, reducing wind resistance, and reducing additional weight Effect

Active Publication Date: 2019-10-01
TONGJI UNIV
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  • Abstract
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Problems solved by technology

[0010] Aiming at the deficiencies of the prior art, the present invention provides a bionics-based aerodynamic drag reduction device applied to bridges and a bridge using the device, which solves the problem of aerodynamic structures that improve flutter stability in existing bridge structures. The problem of poor universality and poor technical effect can significantly improve the overall flutter stability of the bridge structure, improve the life of the bridge, and reduce the risk

Method used

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  • A bionics-based pneumatic drag reduction device and bridge
  • A bionics-based pneumatic drag reduction device and bridge
  • A bionics-based pneumatic drag reduction device and bridge

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

[0027] image 3 is the structural schematic diagram of the pneumatic drag reducing device, Figure 4 It is a bridge covered with the aerodynamic drag reducing device. An aerodynamic drag reduction device based on bionics, comprising a grid structure and blades attached to the grid structure, both the grid structure and the blades are flexible materials, and each grid of the grid structure is movably installed There are said blades, and the size of said blades is adapted to said respective g...

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Abstract

The invention discloses a bionics-based pneumatic resistance reducing device. The device comprises a grid structure and blades attached to the grid structure, the grid structure and the blades are allmade from flexible materials, each grid of the grid structure is internally and movably provided with a corresponding blade, and the sizes of the blades are adapted to the sizes of the grids. Each blade can separately deform and vibrate, the pneumatic shape can be adaptively changed under the action of different winds to reduce the wind resistance under various conditions, and the blades are allowed to vibrate, thereby being capable of reducing energy consumption while reducing resistance, and further reducing wind-induced vibration of bridge structures.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to an aerodynamic drag reduction device applied to bridges. Background technique [0002] As a long-span structure, bridges inevitably have the problem of wind-induced vibration. Among them, the divergent self-excited vibration called flutter is more dangerous. At this time, when the bridge structure vibrates, it can continuously absorb energy in the flowing air, and the energy is greater than that of the structure. Damping the energy dissipated in the vibration, the vibration of the bridge will become more severe and the instability of bending-torsion coupling or pure torsional instability will occur, resulting in structural damage. When the wind speed is below a speed known as the flutter critical wind speed, the bridge structure will not flutter and thus avoid damage due to flutter. [0003] The natural wind in the atmospheric boundary layer where the bridge structure is located...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/00
Inventor 赵林丁叶君崔巍葛耀君
Owner TONGJI UNIV
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