The offshore area near China is a region frequently affected by tropical cyclones (TC). For sake of affection from TC, the ocean engineering is often destroyed, so the extreme wind of TC is one of important parameters for the design of ocean engineering. Wind field distribution of offshore TC is asymmetrical, therefore, the asymmetrical typhoon model is adopt to calculate the 2-hourly wind field of TC which affected China offshore from 1961 to 2007 with the resolution of 50km×50km, combining with TC...