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）

重庆交通大学学报（自然科学版） ›› 1996, Vol. 15 ›› Issue (4): 78-83.

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弯道环流计算中无解析解积分式的近似表达式

许光祥1, 周正禄2   

  1. 1. 重庆交通学院水港工程系, 630074;
    2. 四川涪陵地区航管处, 638000
  • 收稿日期:1996-03-20 出版日期:1996-08-24 发布日期:2016-11-10
  • 作者简介:许光祥,男,1966年生,讲师.

Approximate Expression of Integration of Non-analytic Solutionin Calculation of Curved Channel Circulation

Xu Guangxiang1, Zhou Zhenglu2   

  1. 1. Department of Waterway and Harbour Engineering;
    2. Department of Channel Adminstration, Huling Prefecture, Sichuan
  • Received:1996-03-20 Online:1996-08-24 Published:2016-11-10

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摘要： 弯道环流横向流速垂线分布公式中,存在两个无法获得解析表达式的积分函数F1(η)、F2(η),极不便于其广泛应用[1].本文将F1(η)、F2(η)的数值积分值进行曲线拟合以及采用其它数学手段,获得了形式简单、实用,精度较高的直接数学表达式,在实际工程、教学、科研等方面的应用极为方便.

关键词: 弯道环流, 无解析解积分式, 近似表达式

Abstract: Formula computing velocity of curved channel circulation contains two integral functions F1(η),F2(η) which,has not analytic expression and it is difficult to use widely.Curve fitting and other mathe matic methods are applied in numerical integration of F1(η) and F2(η),then direct mathematic expressions whose form are simple and practical and presicion is very high are obtained in this paper.It is very convenient to apply it in practical engineering and teaching and sicence investigation.

Key words: curved channel circulation, integral formula of non-analytic solution, approximate expression