罗乃东    赵国藩
    （大连理工大学海岸及近海工程国家重点实验室 116024）

[提要]  综述了影响统计平均风速的几个因素，特别阐述了时距对平均风速的影响。根据Shinozuka的理论和Davenport脉动风速功率谱模拟产生了风速、风压样本，并利用蒙特卡洛法分析了忽略脉动风速平方项对脉动风压功率谱密度函数的影响，进而分析了其对于风荷载作用下的结构动力响应的影响。
[关键词]  风荷载  时距  蒙特卡洛法  脉动风压功率谱

The factors that affect the statistic mean wind velocity, especially the time interval, are expatiated. The samples of wind velocity and wind pressure are simulated according to the theory of Shinozuka and the Davenport's power spectrum. The effects on the power spectrum of pulsating wind pressure as well as on the dynamlc response of the structure under wind loads are analyzed by Monte Carlo method when the square item of pulsating wind velocity is ignored.
Keywords:  wind loading; time interval; Monte Carlo method; power spectrum; pulsating wind pressure