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首页> 外文会议>Innovative infrastructures - toward human urbanism : Report >Self-adaptive fairing of steel box girder design and studies of flutter stability by CFD numerical simulation
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Self-adaptive fairing of steel box girder design and studies of flutter stability by CFD numerical simulation

机译：钢箱梁自适应整流罩设计及颤振稳定性的CFD数值模拟研究

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The long-span bridge is greatly influenced by the wind. This paper introduces the self-adaptivernfairing with the wind guide pipe. The self-adaptive fairing are on both sides of the steel box girder ,rnthe angle is adjusted according to wind direction and the wind guide pipe opened at the same time.rnIt can improve the aerodynamic characteristics and wind-resistant stability.Self-adaptive fairing isrncomposed of the following parts: the movable wind guide plate, the fixed wind guide plate, thernwind guide pipe, the cover plate of the wind guide tube, the servo system, the sensor system and therncontrol system. Also in this paper, the computational fluid dynamic method was used to study flutterrnstability of the main beam with self-adaptive fairing. Establishes two dimensional bending andrntorsion fluid-structure interaction model to study how the angle of fairing and wind guide piperninfluence flutter critical wind speed. The numerical simulation results shows that the angle ofrnfairing changes with the direction of wind and opening of the wind guide pipe can raise criticalrnwind speed of the flutter. This provides a new innovative way for designing a wind-resistant longspanrnbridge.
机译：大跨度桥梁受风的影响很大。介绍了导风管的自适应整流。自适应整流罩位于钢箱梁的两侧，可根据风向调节角度，同时打开导风管。可提高空气动力学特性和抗风稳定性。它由以下部分组成：可移动导风板，固定导风板，导风管，导风管盖板，伺服系统，传感器系统和控制系统。同样，在本文中，使用计算流体动力学方法来研究具有自适应整流罩的主梁的颤振稳定性。建立了二维弯扭扭转流固耦合模型，研究了整流罩和导风管的角度如何影响临界风速。数值模拟结果表明，风向角随风向的变化和导风管的开启可以提高颤振的临界风速。这为设计抗风的跨度桥提供了一种新的创新方式。

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