Adaptive tuyere of steel box girder

Abstract

The invention relates to an adaptive tuyere of a steel box girder. A bracket is arranged on the side surface of the steel box girder; a reinforcement plate is arranged in a panel of a movable air guide plate; the reinforcement plate is provided with a rotating shaft; the movable air guide plate is arranged at the end of the bracket through the rotating shaft; an upper fixed air guide plate and a lower fixed air guide plate are arranged on the upper part and the lower part of the bracket respectively; an air inlet and an air outlet are formed at both ends of a middle tube of an air guide tube with a constant section or a variable section; a plurality of middle tubes share one air outlet; air guide tube cover plates are arranged outside the air inlets; the air inlets and the air outlet are fixed on the upper fixed air guide plate and the lower fixed air guide plate respectively; the movable air guide plate and the air guide tube cover plates are connected with a servo system and a sensor system respectively; and the servo system and the sensor system are connected with a singlechip. A lifting coefficient and a pitching moment coefficient are changed by changing an air pressure difference between the top surface and the bottom surface of the steel box girder, so that the vortex falling frequency can be changed and the shimmy critical air speed of the box girder is increased; moreover, the pneumatic characteristic of the structure can be adjusted and the anti-wind capability of a bridge structure can be enhanced.

Description

technical field [0001] The patent of the present invention relates to a steel box girder self-adaptive air nozzle which can adjust the aerodynamic characteristics of the box girder in real time and improve the wind resistance capacity of the bridge structure. Background technique [0002] The air nozzles of conventional steel box girders are at a fixed angle, and there is no air duct. Engineering examples show that this kind of fixed nozzle is effective for inland bridges with a span of about 1,000 meters. In addition to the drastic changes in the airflow in the offshore area, the problem of aerodynamic stability of the bridge is becoming more and more prominent, and the fixed shape of the nozzle has obvious limitations. In order to improve the wind resistance of the bridge structure, ensure the safety of the structure, and meet the requirements of driving comfort, it is necessary to design a It is an adaptive air nozzle that can adjust the aerodynamic characteristics of t...

AI Technical Summary

Problems solved by technology

Engineering examples show that this kind of fixed nozzle is effective for inland bridges with a span of about 1,000 meters. In addition to the drastic changes in the airflow in the offshore area, the problem of aerodynamic stability of the bridge is becoming more and more prominent, and the fixed shape of the nozzle has obvious limitations.

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