[1]马麟,刘健新,韩万水..基于改进谐波合成法的杭州湾跨海大桥风场模拟研究[J].郑州大学学报(工学版),2008,29(01):56-60.
 Ma Lin,LIU Jianxin,Han Wanshui.Wind field simulation study of Hangzhou Bay Bridge based on improved harmonic synthesis method[J].Journal of Zhengzhou University (Engineering Science),2008,29(01):56-60.
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基于改进谐波合成法的杭州湾跨海大桥风场模拟研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
29
期数:
2008年01期
页码:
56-60
栏目:
出版日期:
1900-01-01

文章信息/Info

Title:
Wind field simulation study of Hangzhou Bay Bridge based on improved harmonic synthesis method
作者:
马麟刘健新韩万水.
长安大学,风洞实验室,陕西,西安,710064, 长安大学,风洞实验室,陕西,西安,710064, 长安大学,风洞实验室,陕西,西安,710064
Author(s):
Ma Lin; LIU Jianxin; Han Wanshui
关键词:
风场模拟 谐波合成法 衰减因子 拉格朗日插值
Keywords:
文献标志码:
A
摘要:
基于风洞试验实测的风参数采用改进谐波合成法模拟了杭州湾跨海大桥全桥风场.风场模拟涉及的风参数主要包括脉动风谱和空间相关函数,对风洞中的风场参数进行了实测拟合并应用于风场模拟当中.谐波合成法模拟大跨桥梁的风场耗时过长、应用不便,用拉格朗日插值法改进谐波合成法可大大提高风场模拟效率,编制了基于改进谐波合成法的风场模拟流程图和相应程序Improved-WAWS,为大跨桥梁的风场模拟提供了切实可行的方法.试验结果表明:衰减因子λ在不同间距D时,存在一定差异,且随风速U的增加,衰减因子不断增加;用改进谐波合成法模拟的风速样本时程的功率谱、互功率谱、相关函数及互相关函数与相应目标值吻合良好.
Abstract:
Based on the wind parameters measured in the wind tunnel test, the wind field of Hangzhou Bay Bridge was simulated by improved harmonic synthesis method. The wind parameters involved in wind field simulation mainly include pulsating wind spectrum and spatial correlation function, and the wind field parameters in the wind tunnel are measured and combined and applied to the wind field simulation. The harmonic synthesis method to simulate the wind field of long-span bridges takes too long and is inconvenient to apply, and the improvement of harmonic synthesis method by Lagrange interpolation method can greatly improve the wind field simulation efficiency, and the wind field simulation flow chart based on the improved harmonic synthesis method and the corresponding program Improved-WAWS are compiled, which provides a practical method for wind field simulation of long-span bridges. The experimental results show that there is a certain difference in the attenuation factor λ at different spacing D, and the attenuation factor increases with the increase of wind speed U. The power spectrum, mutual power spectrum, correlation function and cross-correlation function of the wind speed sample time history simulated by the improved harmonic synthesis method are in good agreement with the corresponding target values.

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[1]赵湘育,李胜利,王正君..大跨径悬索桥施工期桥塔脉动风速场模拟[J].郑州大学学报(工学版),2010,31(04):19.[doi:10.3969/j.issn.1671-6833.2010.04.005]

更新日期/Last Update: 1900-01-01