高耸结构广义人造脉动风时程模拟研究

高耸结构的风振响应要考虑非线性就必须在时域内进行,这就要发展顺风向脉动风的模拟方法。本文在了解风的基本特性基础上,利用互谱密度矩阵分解,并考虑了随高度变化的风谱,为提高计算机效率和计算精度,引入了快速FFT变换技术,数值算例表明该方法切实有效可行。

SIMULATION OF DYNAMIC WIND LOAD TIME HISTORY ON HIGH -RISE STRUCTURE

The wind vibration response of the high-rise structure must be analyzed in the time history if taking the nonlinear behaviors into account.So,simulation method must be developed to simulate the impulsive motion along with the wind.This paper introduces the basic character of the wind first,by use of the decomposition of the cross-spectral density matrix and the wind spectrum was taken into consideration.FFT technique is also adopted in order to improve the calculation efficiency and precision.Numerical example indicates the feasibility of this method.