| 桥梁断面的气动导数和颤振临界风速的数值计算 |
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| 引用本文： | 曹丰产,项海帆,陈艾荣.桥梁断面的气动导数和颤振临界风速的数值计算[J].空气动力学学报,2000,18(1):26-33. |
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| 作者姓名： | 曹丰产 项海帆 陈艾荣 |
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| 作者单位： | 同济大学土木工程防灾国家重点实验室,上海,200092 |
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| 摘 要： | 选取有代表性的大海带东桥、南京二桥流线型闭口箱梁断面和荆沙桥钝头开口板梁断面，用动网格法考虑流体和结构的耦合作用，用有限单元法求解原始变量二维不可压粘性流体的Ｎ－Ｓ方程，计算其气动导数，并用半逆解法确定颤振临界风速。计算结果和实验值相当吻合。
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| 关 键 词： | 桥梁断面 N－S方程 动网格法 气动导数 数值计算 |
| 文章编号： | 0258-1825（2000）01-0026-08 |
| 修稿时间： | 1998-11-02 |
Numerical Assessment of Aerodynamic Derivatives and Critical Wind Speed of Flutter of Bridge Decks |
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| Cao Fengchan,Xiang Haifan,Chen Airong.Numerical Assessment of Aerodynamic Derivatives and Critical Wind Speed of Flutter of Bridge Decks[J].Acta Aerodynamica Sinica,2000,18(1):26-33. |
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| Authors: | Cao Fengchan Xiang Haifan Chen Airong |
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| Abstract: | Numerical assessment of aerodynamic derivatives are conducted by solving two dimensional incompressible Navier Stokes equations with discrete projection finite element method and multigrid techniques. Unsteady aerodynamic force on the heaving or torsional oscillated rigid decks are computed and the motion of deck is accounted by moving mesh method. The aerodynamic derivatives are extracted with least square method and critical wind speed of flutter are calculated with Scanlan's method. The results of decks with typical shape such as Great Belt East Bridge, Nanjing 2 nd Bridge and Jingsha Bridge are in agreement well with experiments. |
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| Keywords: | bridge deck N S equations moving mesh method aerodynamic derivatives |
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