Indicial Functions Algorithm and Time Domain Flutter Analysis of Bridges
Based on ANSYS Program

doi:10.3969 /j.issn.1674-0696.2012.02.01

Journal of Chongqing Jiaotong University(Natural Science) ›› 2012, Vol. 31 ›› Issue (2): 173-178.DOI: 10.3969 /j.issn.1674-0696.2012.02.01

Indicial Functions Algorithm and Time Domain Flutter Analysis of Bridges Based on ANSYS Program

Qing Qianzhi^1,2，Zhang Zhitian¹，Xiao Wei¹，Zhu Mingkun¹

1. Wind Engineering Research Center of Hunan University，Changsha 410082，Hunan，China; 2 Shanghai Municipal Engineering Design Institute ( Group) Co. ，Ltd. ，Shanghai 200092，China

Received:2011-10-10 Revised:2011-11-11 Online:2012-04-15 Published:2014-10-31

基于ANSYS 平台的桥梁时域颤振阶跃函数算法

卿前志^1,2，张志田¹，肖玮¹，朱明坤¹

重庆交通大学河海学院，重庆400074

作者简介:卿前志( 1985 － ) ，男，湖南邵阳人，硕士，主要从事桥梁设计研究工作。E-mail: qqz239@126． com。
基金资助:
国家自然科学基金资助项目( 90915002， 50708036， 50738002)

Abstract

Abstract: On the basis of sectional flutter derivatives，the indicial functions are firstly adopted in this literature to simulate the self-excited aerodynamic forces of bridge girder section，and，of which the simulation veracity is inspected． Then the recursive algorithm of bridge section self-excited aerodynamic forces，which is indispensable in the dynamic finite element analysis procedure，is deduced． Based on simulated self-excited aerodynamic forces，the time-domain flutter analysis is achieved in ANSYS in virtue of the embedded APDL language wherein． At last，a numerical example — a simple supported beam is selected to verify this method in time-domain using ANSYS software． Numerical example is in good accordance with what reported in the listed references． What presented in this paper shows it is feasible to conduct the time-domain investigation of aerodynamic stability of a bridge based on secondary development of the ANSYS program，which is capable of improving the efficiency of bridge flutter analysis or flutter-buffeting analysis，reducing the risk of algorithmic error or careless omissions involved in self-developing large software．

Key words: indicial function, flutter, time-domain analysis

摘要： 结合断面的颤振导数，采用阶跃函数对桥梁断面自激力进行模拟，并对模拟准确性进行了分析与校核| 推导出时域颤振动力有限元分析中自激力的递推表达式。基于阶跃函数拟合气动力，利用APDL 语言在ANSYS 中实现了颤振时域分析| 以一简支梁为例，介绍了在ANSYS 中实现颤振时程分析的过程。数值算例计算结果和相关文献报道基本一致。研究表明: 利用ANSYS 的二次开发平台进行桥梁气动稳定性能的时域分析是可行的，该方法可提高桥梁颤振分析或颤抖振理论分析效率，降低自主开发大型软件过程中的算法错误或疏漏所带来的风险。

关键词: 阶跃函数, 颤振, 时域分析

CLC Number:

TU311.3

Qing Qianzhi，Zhang Zhitian，Xiao Wei，Zhu Mingkun. Indicial Functions Algorithm and Time Domain Flutter Analysis of Bridges Based on ANSYS Program[J]. Journal of Chongqing Jiaotong University(Natural Science), 2012, 31(2): 173-178.

卿前志，张志田，肖玮，朱明坤. 基于ANSYS 平台的桥梁时域颤振阶跃函数算法[J]. 重庆交通大学学报（自然科学版）, 2012, 31(2): 173-178.

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Indicial Functions Algorithm and Time Domain Flutter Analysis of Bridges Based on ANSYS Program

基于ANSYS 平台的桥梁时域颤振阶跃函数算法

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