摘要
以全国7座代表气象站30多年实测资料为基础,分析了日平均空气密度的时序变化特征,并对电力工程设计常用的多年平均空气密度和标准空气密度计算的风压与实际风压的偏差进行研究。结果表明:空气密度随季节变化较大,冬季空气密度大于夏季;受寒潮大风影响明显的地区风压计算值较实际风压偏小。建议对工程结构进行抗风设计时,采用大风季节的空气密度进行风压计算更为合理。
Based on more than 30 years of measured data from seven representative weather stations across the country,the time-sequence change characteristics of daily average air density are analyzed,and the deviation of wind pressure calculated by“annual average air density”and“standard air density”commonly used in power engineering design are analyzed from the actual wind pressure.The results show that the air density varies greatly with the seasons,which in winter is greater than that in summer.The calculated wind pressure in the area affected markedly by the cold wave and high wind is smaller than true value.The air density in the windy season is recommended to be used for wind pressure calculation in structure engineering wind-resistant design.
作者
程春龙
潘晓春
CHENG Chun-long;PAN Xiao-chun(China Energy Engineering Group Jiangsu Power Design Institute Co.,Ltd.,Nanjing 211102,China)
出处
《黑龙江科学》
2019年第22期1-3,共3页
Heilongjiang Science
关键词
空气密度
时序变化特征
风压计算
影响
Air density
Time-sequence change characteristics
Wind pressure calculation
Influence
