中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 1996, Vol. 15 ›› Issue (2): 72-80.

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PⅢ分布曲线ψ值表的研究及软件开发

罗才茂,张光平   

  1. 1.重庆交通学院水港工程系;2.中科院力学所
  • 收稿日期:1995-07-13 修回日期:1995-07-13 出版日期:1996-06-20 发布日期:2016-07-12
  • 作者简介:罗才茂,男,29岁,讲师

A Study on Value Table of P-Ⅲ Distribution

Luo Caimao,Zhang Guangpin   

  1. Department of Harbour and Waterway Engineering
  • Received:1995-07-13 Revised:1995-07-13 Online:1996-06-20 Published:2016-07-12

摘要: PⅢ分布曲线的离均系数值表是PⅢ曲线的根本,目前我国所采用的值表是在较落后计算条件下产生的,本文在利用连分级数及求和级数精确计算PⅢ分布积分的基础上,联合牛顿迭代法与弦截矩法,可以很快地在已知Cs和频率P(%)的情形下迭代求得离均系数值.并和英文原版数学手册的有关数值进行了对比,结果完全相符,在此基础上,给出了几个频率P(0.001-1.0%),Cs从0.0-6.5(间隔0.1)的值表,原值表与现值表在频率很小时在小数后面的第二位有差异,本文给出的其对比结果.作者编制了汉化的软件.

关键词: P啊分布, 连分级数计算, 离均系数值表, 牛顿迭代法, 弦截矩法

Abstract: The value table of P-Ⅲ Distribution is significant for plotting the P-Ⅲ curve.The prensent value table was calculated in 1960, updating it is necessary.Using series formulas instead of integratingmethod, present method saves a lot of CPU time and the results match the results of Mathematical Handbook. Combining the Newtonian Iteration Method and the interpolation iteration method, the degree ofconvergence of value is 10-10.The prsent paper gives some differences between the old value tableand present results. And the Chiners software has been worked out.

Key words: P-Ⅲdistribution, continued fraction, value table, Newtonian iteration, interpolationiteration

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