摘要
为了分析大坝温度场受渗流场影响的变化情况,根据热传导理论和渗流理论给出了受渗流场影响的非稳定温度场的控制方程,然后应用伽辽金法导出这一问题的有限元公式,最后给出了考虑渗流影响的大坝非稳定温度场的计算实例.计算结果表明:外界温度变化及渗流场对大坝温度场影响是不应忽视的;渗流场的存在改变了温度场的空间分布;在1月份气温低水温高时,渗流的影响将会使坝体温度偏高;在8月份气温高水温低时,渗流的影响将会使坝体温度偏低;渗流的影响将使温度的变化幅值减小.
In order to analyze the temperature field by the impact of seepage field, the governing differential equations of the unsteady temperature field with consideration of seepage field are derived on the basis of heat transfer and seepage theory. The finite element formulae of this problem are obtained from Galerkin＇s method. An illustrative example of the unsteady temperature field in a dam with consideration of seepage field is provided. It shows that the change of boundary temperature and the are remarkable. Seepage field changed the spatial effect of seepage filed on temperature field distribution of temperature field. Seepage will make the temperature rise in January,and make the temperature low in August. The im pact of seepage would reduce the amplitude of the changes in temperature.
出处
《长沙理工大学学报（自然科学版）》
CAS
2008年第1期44-47,共4页
Journal of Changsha University of Science and Technology:Natural Science
关键词
非稳定温度场
渗流场
大坝
有限元
unsteady temperature field
seepage field
dam
finite element method
