Statistical study for mean wind velocity in Shanghai area

In order to predict mean wind velocity in the Shanghai area, the probability distribution model of extreme values has been used in the statistical analysis of joint distribution of wind speed and corresponding direction in this paper. The theoretical model of the joint probability distribution with directional independent coefficients is set up to describe joint distribution of wind speed and direction, and its application method is developed into three statistical steps, data processing of wind speed records, examination of joint distribution model and estimation of distribution model parameters. These application methods have been used to calculate extreme wind velocity in the surface measurement stations, Baoshan, Chuansha and Longhua, and at the deck level of the Yangpu Bridge in Shanghai.