摘要
为更准确地研究风力发电结构在风荷载下的结构响应,基于甘肃气象局提供的1981-2017年甘肃六地风速风向实测数据,对各地区的风速风向联合概率进行分析.抽取每天的最大极值风速及其对应风向为极值样本,统计分析得到各地区风速风向联合分布.将Gumbel,Frechet和Weibull分布函数线性化的基础上,利用最小二乘法拟合各分布函数参数,根据参数拟合结果推算各地区10,50和100年重现期的极值风速,并和各地区最大基本风速规范建议值进行对比.研究结果表明,考虑风速风向概率影响的基本风速更加符合实际情况,最大基本风速规范建议值偏于保守.
In order to study the structural response of wind power generation structure under wind load more accurately,based on long-term field-measurement data in six regions of Gansu Province from 1981 to 2017 provided by Gansu Meteorological Bureau,the extreme value samples were selected by the extreme value sampling method using one day as the basic interval,and the joint distribution of wind speed and direction in each region was obtained through statistical analysis.Based on the linearization of Gumbel,Frechet and Weibull distribution functions,the least square method was used to fit the parameters of each distribution function.The parameters of each distribution function are fitted by the least square method,and the extreme wind speed with return periods of 10,50 and 100 years in each region is calculated according to the parameter fitting results,and compared with the recommended value of the maximum basic wind speed standard in each region.The results show that the basic wind speed considering the influence of wind speed and direction probability is more in line with the actual situation,and the value of the maximum basic wind speed recommended by the code is conservative.
作者
李万润
张广隶
李林
杜永峰
LI Wan-run;ZHANG Guang-li;LI Lin;DU Yong-feng(Institute of Earthquake Protection and Disaster Mitigation,Lanzhou Univ.of Tech.,Lanzhou 730050,China;School of civil engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Lanzhou Meteorological Bureau,Lanzhou 730020,China)
出处
《兰州理工大学学报》
CAS
北大核心
2022年第3期115-124,共10页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51568041)。
关键词
风速风向
联合概率分布
基本风速
最小二乘法
wind speed and direction
joint probabilistic distribution
basic wind speed
least square method
