长江科学院院报 ›› 2012, Vol. 29 ›› Issue (11): 33-36.DOI: 10.3969/j.issn.1001-5485.2012.11.007

• 水力学 • 上一篇    下一篇

梯形明渠共轭水深计算方法

李 蕊1,王正中2,张宽地2,王志刚2   

  1. 1.杨凌职业技术学院 公共课教学部,陕西 杨凌  712100;2.西北农林科技大学 水利与建筑工程学院, 陕西 杨凌  712100
  • 收稿日期:2011-08-29 修回日期:2011-11-10 出版日期:2012-11-01 发布日期:2012-11-15
  • 作者简介:李蕊(1978-),女,陕西合阳人,讲师,硕士,主要从事应用数学及水力计算方法的研究
  • 基金资助:

    国家自然科学基金资助项目(41001159);陕西省自然基金(2011JQ5004)

Calculation Method for Conjugate Water Depth in Open Trapezoidal Channel

LI Rui1, WANG Zheng-zhong2, ZHANG Kuan-di2, WANG Zhi-gang2   

  1. 1. Yangling Vocational and Technical College, Yangling  712100, China;2. College of Water Resources and Architectural Engineering,  Northwest A&F University, Yangling  712100, China
  • Received:2011-08-29 Revised:2011-11-10 Online:2012-11-01 Published:2012-11-15

摘要: 一方面,通过对共轭水深方程进行数学变换,并根据共轭水深的水流特点,得到计算其水深的迭代公式;另一方面,通过求解一元二、三次方程得到共轭水深的初值近似计算式,并以此为初值,用迭代公式进行一次迭代得到梯形明渠共轭水深的直接计算公式。计算数据表明,该法不依赖图表,计算便捷且精度很高,可供工程实际参考应用。

关键词: 共轭水深, 计算公式, 梯形明渠

Abstract: A calculation method for the conjugate water depth in open trapezoidal channel is presented. First of all, an iterative formula for the conjugate depth is given on the basis of  mathematical transformation of the basic equation of conjugate depth and its flow characteristics. Subsequently, by solving unary quadratic equation and cubic equation, an approximate formula for the initial value of conjugate water depth is obtained, based on which an expression for the initial value iteration is established. A direct formula is thus obtained by using the iterative formula. An illustrative calculation indicates that this method is simple and accurate, and the neither table nor  figure is needed to determine the empirical coefficients.             

Key words: conjugate water depth, calculation formula, trapezoidal open channel

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