摘要
对1000kV汉江大跨越输电塔线体系进行风振响应分析,有必要考虑不同方向的随机脉动风速对体系产生的整体作用。谐波合成法是一种精度较高且无条件稳定的随机过程模拟方法,在单维多变量随机风场合成方法的基础上,引入了纵向与竖向脉动风速的交叉谱的影响。经过对模拟样本的谱密度函数、相关函数检验验证,该方法能准确有效地模拟出符合要求的多维多变量随机样本。为汉江大跨越输电塔线体系的三维风振响应分析提供基础。
It is necessary to consider the effect of different directions of stochastic wind field on the system in the wind-induced responses analysis of 1000 kV Hanjiang long span transmission line . Based on the 1D-nV spectral representation method, the cross-spectrum of the vertical wind and the portrait wind was analyzed. The results by simulating wind field show that the power spectral density function and cross-correlation function are in good agreement with the expected targets, therefore, the propbsed method can simulate the target stochastic wind velocity field accurately and effectively. It provides the basis for the wind-induced response analysis of 1000 kV Hanjiang long span transmission line system.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第5期999-1004,共6页
High Voltage Engineering
基金
国家自然科学基金(50678181
50708118)
国家电网公司科技项目(SGKJ[2007]413)~~
关键词
风场模拟
谐波合成法
三维风场
特高压
输电塔
随机过程
wind field simulation
harmonic synthesis method
3D stochastic wind field
UHV
transmission tower
stochastic processes
