基于混合编程的大跨桥梁桥塔抖振时域分析  

Time-domain buffeting analysis of the tower of long-span bridges on the basis of mixed programming

作　　者：王统宁[1] 马麟[2] 刘健新[1] 李加武[1] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]西北工业大学力学与土木建筑学院,陕西西安710072

出　　处：《长安大学学报（自然科学版）》2009年第3期68-72,共5页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(50578014)

摘　　要：基于大跨桥梁桥塔抖振时域分析,采用Matlab和ANSYS参数化设计语言(APDL),编写了相应程序和命令流,分析大跨桥梁抖振响应;给出了用改进谐波合成法模拟风场和用混合编程实现抖振分析的方法,在Matlab中实现风场模拟,用ANSYS中的瞬态分析实现抖振时域分析,并应用于湖北鄂东长江公路大桥桥塔抖振分析。结果表明:基于混合编程抖振分析方法是可行和正确的;拉格朗日插值改进模拟风场的谐波合成法减少了矩阵分解的次数,提高了计算效率。According to analysis for buffeting response of the tower of long-span bridges in time domain, program is realized by mixed programming with Matlab and ANSYS parametric design language（APDL） for analyzing buffeting response of long-span bridges in this paper. The method for the turbulent wind field simulation on the basis of improved WAWS and buffeting analysis on the basis of mixed programming are adopted. Turbulent wind fields in Matlab environment were simulated, and buffeting time-domain analysis with transient dynamic analysis in ANSYS environment were finished, and the north tower of the E-dong Yangtse River in Hubei Province is analyzed. The results show that method of wind field simulation and buffeting analysis is feasible and correct, and spectral representation method of simulating wind field is improved with Lagrange interpolation, the number of matrix＇s Cholesky decomposition is largely decreased, and calculating efficiency is markedly advanced. 1 tab, 9 figs, 11 refs.

关 键 词：桥梁工程 抖振时域分析 混合编程 改进谐波合成法 桥塔风效应 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]