论文部分内容阅读
为克服传统研究风压极值方法忽略带宽参数影响的不足和改进概率密度函数拟合效果,结合曲面拟合方法获得一种改进Hermite级数,提出了引入带宽参数的改进Hermite峰值因子法。采用改进Hermite峰值因子法和以往常用方法对开孔屋盖风压的峰值因子进行研究。结果表明:基于高斯分布的Davenport的峰值因子明显偏离非高斯峰值因子;忽略带宽参数的传统Hermite峰值因子法高估了风压的正负峰值因子;改进Hermite峰值因子法相应于传统Hermite方法和修正Hermite方法和Sadek-Simiu方法,估计的开孔屋盖风压的峰值因子最为安全准确,与观测峰值因子总体上最为接近。
In order to overcome the shortcomings of ignoring the effects of bandwidth parameters and improve the fitting effect of probability density function in traditional research methods of extreme pressure of wind pressure, an improved Hermite series was obtained by combining with surface fitting method. An improved Hermite crest factor method was proposed. The improved Hermite crest factor method and the conventional method were used to study the crest factor of open roof pressure. The results show that the peak factor of Davenport based on Gaussian distribution significantly deviates from the non-Gaussian peak factor. The traditional Hermite peak factor method which ignores the bandwidth parameter overestimates the positive and negative peak pressure factors of wind pressure. The improved Hermite peak factor method corresponds to the traditional Hermite method and correction Hermite method and Sadek-Simiu method, the estimated peak pressure of open roof wind pressure is the safest and most accurate, and the peak factor of observation is the closest.