长江科学院院报 ›› 2013, Vol. 30 ›› Issue (6): 90-94.DOI: 10.3969/j.issn.1001-5485.2013.06.020

• 水工结构与材料 • 上一篇    下一篇

反演梯形渠道砼衬砌体表面温度的太阳辐射模型

孙杲辰1,王正中1,2,李爽1,杨晓松1,肖旻1,安元1   

  1. 1.西北农林科技大学 水利与建筑工程学院,陕西 杨凌712100;
    2.中国科学院寒区旱区环境与工程研究所 冻土国家重点实验室, 兰州730000
  • 收稿日期:2013-06-04 修回日期:2013-06-04 出版日期:2013-06-04 发布日期:2013-06-04
  • 通讯作者: 王正中(1963- ),男,陕西彬县人,教授,博士生导师,主要从事水工结构工程及冻土工程学科教学与科研工作,(电话)029-87082980(电子信箱)wangzz0910@163.com。
  • 作者简介:孙杲辰,男,甘肃庆阳人,硕士研究生,从事冻土本构及渠道冻胀方面研究,(电话)15129283356(电子信箱)maomaosgc@163.com。
  • 基金资助:

    国家自然科学基金(51279168);国家科技支撑计划(2012BAD10B02);陕西水利科技专项 (SXSL2011-03);陕西农业科技创新项目(2011NXC01-20);冻土工程国家重点实验室项目(SKLFSE-201105)

Solar Radiation Model for the Back Analysis of Surface Temperature of Concrete Lining of Trapezoidal Canal

  • Received:2013-06-04 Revised:2013-06-04 Online:2013-06-04 Published:2013-06-04

摘要:

根据渠道不同部位衬砌体表面接受太阳辐射量不同、温度不同的基本规律,利用太阳辐射量之间相互平衡的关系,建立了通过太阳净辐射反演渠道衬砌体表面温度的一种简单实用的太阳辐射模型。利用MATLAB编程计算出了考虑遮蔽情况下渠道不同部位的大气温度T 0及衬砌板温度T S 随时间t变化的曲线,比较了各个部位混凝土温升与大气温升的关系。计算实例表明,模型不仅符合实际中的规律,而且为以后的渠道表面衬砌体温度反演提供了一种简单可行的方法。

关键词: 梯形渠道, 砼衬砌体, 太阳辐射, MATLAB, 净辐射

Abstract:

The lining surface of different parts of canal accepts different solar radiation and has different temperature. In line with the balanced relationship between the amount of solar radiation and net solar radiation, a simple and practical solar radiation model was established for the back analysis of canal lining’s surface temperature. By using MATLAB programming, the atmospheric temperature T 0 at different parts of the canal and the variation of ling temperature T s with time t was calculated taking shaded parts into consideration. The relation between concrete temperature rise at different parts and atmospheric temperature rise were compared. Calculation example revealed that: the variation of atmospheric temperature T 0 and the lining plate temperature T s respectively at canal bottom, shaded slope and sunny slope were in consistency; with the rise of atmospheric temperature, the lining surface temperature increased rapidly and exceeded the atmospheric temperature and reached the maximum. But the range of temperature change varied significantly: sunny slope presents a widest range of temperature rise, followed by canal bottom and shaded slope. The maximum temperature of lining surface came later than that of atmospheric temperature. This model not only conforms with reality and provides a simple and feasible method for the back analysis of lining surface temperature.

Key words: trapezoidal canal, concrete lining, solar radiation, MATLAB, net radiation

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