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(一)基本风压的计算新规范根据全国400多个地点的气象台站从1951年到1971年(部分台站从1955年或1958年到1971年)的年最大风速资料,按照我国基本风压的标准要求,将不同风仪高度和4次定时2分钟平均年最大风速,统一换算为离地10米高、自记10分钟平均年最大风速,再求统计30年一遇最大风速。因此必须经过高度换算、次时换算(次数和时距合为一次换算)和概率计算。 1.风仪高度换算我国气象台站风仪高度大都在8～12米
(i) New specifications for calculation of basic wind pressure Based on the annual maximum wind speed data from 1951 to 1971 (partial stations from 1955 or 1958 to 1971) at meteorological stations in more than 400 locations across the country, according to basic wind pressure in China The standard requirements, the different wind instrument height and 4 times the average annual maximum wind speed of 2 minutes, unified conversion to 10 meters above the ground, self-recorded average annual maximum wind speed of 10 minutes, and then calculate the maximum wind speed in 30 years. Therefore, it is necessary to go through the height conversion, sub-time conversion (the number of times and the time span are combined into one conversion) and the probability calculation. 1. The height of the wind gauge is converted to a height of 8-12 meters for the meteorological station in China.