中文说明：
脉动风功率谱，适用于对结构的分析，直接法求脉动风功率谱密度函数，同时适用于其他功率谱密度函数的求法
English Description：
The power spectrum of fluctuating wind is suitable for the analysis of structure. The direct method is suitable for the calculation of power spectrum density function of fluctuating wind, and it is also suitable for the calculation of other power spectrum density functions