大跨径悬索桥施工期桥塔脉动风速场模拟  

Simulation of Turbulent Wind Velocity for Pylon of Long-span Suspension Bridge During Construction

作　　者：赵湘育[1] 李胜利[1] 王正君[2] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]黑龙江大学建筑工程学院,黑龙江哈尔滨150086

出　　处：《郑州大学学报（工学版）》2010年第4期19-22,共4页Journal of Zhengzhou University（Engineering Science）

摘　　要：针对大跨径悬索桥施工期桥塔的结构形式及振动形态特点,考虑结合自然风的时间和空间相关性,提出了一种比较精确的三维脉动风速场模拟方法.基于谐波合成法,采用Cholesky方法对谱密度矩阵进行分解,并运用FFT技术,以某大跨径悬索桥施工期桥塔为工程实例,使用MATLAB编制了脉动风速场模拟程序,并对模拟样本进行检验,结果表明模拟值与目标值吻合良好.A precise simulation method of three dimensional turbulent wind velocity for pylon of long span suspension bridge during construction is put forward by considering correlation of time and space for natural wind.The simulation program of turbulent wind velocity for some pylon of long span suspension bridge during construction was compoled by MATLAB and WAWS,adopting fast Fourier transform（FFT） and CHOLESKYmethod.The simulate samples are tested,and results show that simulation value is in good agreement with the target value.

关 键 词：悬索桥 桥塔 脉动风模拟 谐波合成法 MATLAB 

分 类 号：U488.25[交通运输工程—载运工具运用工程]