大型矩形混凝土渡槽运行期太阳辐射温度场模拟研究

Study on temperature field of huge concrete aqueducts in operation period under solar radiation

根据南水北调中线大型矩形混凝土渡槽在夏季太阳辐射工况下温度场的分布及变化规律,建立了太阳辐射模型,并依据渡槽温度边界条件,采用有限元法对其进行了系统分析.结果表明:太阳辐射对混凝土渡槽运行期温度场影响显著,时空变化剧烈,会造成渡槽结构骤变的温度场和较强非线性的温度分布,进而影响渡槽的正常使用.

Aimed at temperature field distribution and variation law of the South-to-North Water Transfer Project ’s mid-route large-scale rectangular concrete aqueduct’s during running period under the condition of summer solar radiation,the solar radiation model is established,according to the aqueduct’s temperature boundary condition,the model is analyzed by the Finite element method. The result shows that：the solar radiation has a great influence on the temperature field of concrete aqueduct during running period,and the rapid change of time and place can result in the abrupt change in temperature field and a more non-linear temperature distribution which can further affect the normal operation of the aqueduct.