总体样本风速风向联合概率分析方法

提出了针对总体样本的风速风向联合分布的实用统计分析方法。假定任意给定风向上的风速符合某一概型分布、风向间的关联以风速资料的相对发生频率反映、不同风向间的概型参数及频率分布的变化满足谐波函数，在此基础上，利用风速风向资料的总体样本可以得到一个能够反映任意方向的风速风向联合分布函数。利用澳门地区的百年风资料与某风站连续5年的风速观测记录，对该方法的可行性进行了验证。分析表明，该方法具有一定的适用性，便于结构的抗风可靠性分析，具有一定的工程应用价值。

Analytical Method of Joint Probability Density Function of Wind Speed and Direction from Parent Population

A framework for analysis of joint probability density function of wind speed and wind direction from parent population is proposed in this paper based on the following three assumptions： （1）the distribution of wind speed in any given wind direction follows identical probability model, say Weibull distribution for instance; （2）the correlation of different wind direction can modeled by relative occurrence frequency of wind data in each wind direction; （3）the variation of relative occurrence frequency and parameters of probability model follows harmonic function. By using this framework, the probability distribution feature of any wind direction can be easily calculated which is of great benefits for safety and reliability analysis of wind-resistant structures. The applicability of the proposed frame work is validated using the one-hundred year wind record of Macau City and 5-year wind record from a wind monitoring station.