摘要
针对大跨度悬索桥的结构形式及振动形态的特点,结合自然风的相关特性,将实际的互相关三维脉动风速场简化为多个线状的不相关的一维脉动风速场。基于谱解法,采用互谱密度矩阵Cholesky分解的显示表达,采用Matlab编程模拟了一大跨悬索桥的脉动风场,应用随机信号分析处理技术对模拟样本进行校验,结果表明模拟值和目标值较为吻合,满足工程实际需求。
According to the features of structural style and vibration mode of large span suspended bridge,considering the correlation of the natural wind, the three-dimensional fluctuating wind field on a plane is simplified into onedimensional fluctuating wind field on multi-lines.Based on the original spectral representation method,an explicit expression of Cholesky's decomposition of the cross-spectral density matrix was used,programming by Matlab software,the simulation of fluctuating wind field of a large span suspended bridge is carried out.Finally,the simulated wind field is checked using random signal processing technology,the results show that the simulated values agree well with the target values,which can meet engineering requirements.
出处
《工业建筑》
CSCD
北大核心
2006年第z1期398-402,共5页
Industrial Construction
关键词
随机过程
数值模拟
脉动风
谱解法
悬索桥
stochastic process numerical simulation fluctuating wind spectral representation method suspended bridge
