Numerical simulation for flutter stability of eccentric bridge section based on fluid-structure interaction

被引：0
|
作者：
Jia J. [1 ]
Han R. [1 ]
机构：
[1] College of Civil Engineering, Northeast Forestry University, Harbin
来源：
Han, Rongxuan | 1600年 / Chinese Vibration Engineering Society卷 / 39期
关键词：
Computational fluid dynamics (CFD); Dynamic mesh; Eccentric bridge section; Fluid-structure interaction; Flutter; Numerical simulation;
D O I：
10.13465/j.cnki.jvs.2020.17.027
中图分类号：
学科分类号：
摘要：
Taking the finite element (FE) software Ansys Fluent as a platform, wind-induced vibration of a 2-D 2-DOF eccentric bridge deck section was studied. Newmark-β method was embedded into user defined functions (UDF), and free vibration considering fluid-structure interaction was realized by solving the corresponding differential equations and updating the corresponding physical quantities in each time step. Compared with a non-eccentric bridge segment model, both left and right sides of dynamic equation for an eccentric bridge segment model have coupled terms. Newmark-β method was used to solve the eccentric 2-DOF dynamic equation set and simple harmonic loads were input for debugging. Numerical solution was compared with the analytical one to verify the correctness of the simulation procedure. It was shown that the numerical simulation value of flutter critical wind speed for the non-eccentric bridge segment model agrees well with the test value obtained by other researchers. The proposed simulation method was used to further simulate effects of eccentricity on the flutter stability of the bridge segment model to improve the method's effect, and wind tunnel tests were used to verify the reliability of numerical simulation. © 2020, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：203 / 209
页数：6
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