城市暴雨强度公式理论频率曲线选择研究  

Study on selection of theoretical frequency curve of urban storm intensity formula

作　　者：肖友淦 XIAO Yougan(Fuzhou City Construction Design&Research Institute Co.Ltd,Fuzhou 350001)

机构地区：[1]福州城建设计研究院有限公司

出　　处：《福建建筑》2019年第12期119-125,共7页Fujian Architecture & Construction

摘　　要：暴雨强度公式编制过程中,理论频率曲线的选择是一个关键问题。系统比较了经验频率曲线、皮尔逊Ⅲ型分布曲线、耿贝尔分布曲线和指数分布曲线的优劣,明确提出在城市暴雨强度公式编制中理论频率曲线应采用皮尔逊Ⅲ型分布曲线。同时,通过一系列数学推导,给出了皮尔逊Ⅲ型分布曲线最优解的求解方法。将该方法和遗传算法结合,采用计算机编程方式,求解一个实际案例在不同拟合准则下的拟合曲线,证明了方法的可行性。The selection of theoretical frequency curve is a key problem in the compilation of urban storm intensity formula.In the paper, Pearson Type Ⅲ curve is proposed as the best theoretical frequency curve by system comparison among Pearson Type Ⅲ curve, Gumbel distribution curve, exponential distribution curve and experience frequency curve.At the same time, through a series of mathematical derivation, the quick method of the optimal solution of Pearson Type Ⅲ distribution curve is also proposed in this paper.The solution of this method is complicated, and it is difficult to solve it by hand.However, by combining this method with genetic algorithm, and writing a special computer program, the solution of this method becomes possible.Then, the computer program is used to solve a practical case in several fitting criterion, The results show that the method is feasible.The fruit of research in this paper can be used to select the theoretical frequency curve and fitting criterion in the compilation of urban storm intensity formula in the future.

关 键 词：暴雨强度公式 理论频率曲线 皮尔逊Ⅲ型分布 耿贝尔分布 指数分布 

分 类 号：TU992[建筑科学—市政工程]