混凝土水管冷却的复合单元算法  

Preliminary Research on Composite Element Algorithm for the Concrete Containing Cooling Pipes

作　　者：苏培芳[1] 陈胜宏[1] 田甜 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]长江勘测规划设计研究院,武汉430010

出　　处：《武汉理工大学学报》2010年第24期48-53,共6页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(50679066)

摘　　要：基于复合单元法基本原理,将冷却水管置于常规混凝土单元内部,建立了含冷却水管大体积混凝土结构温度场仿真分析的复合单元算法。该方法既可以离散模拟冷却水管,又避免了绘制冷却水管网格的困难。复合单元中节点温度的求解过程与传统的有限元法类似。当水管通水结束时,含水管复合单元可自动退化成常规有限单元,进行二期通水时,只需将水管所在处的常规单元变成复合单元,不需变动网格。通过与常规有限单元法计算结果的比较,表明了复合单元法的合理性,同时也突出体现了其前处理简便的优势。A preliminary composite element algorithm for temperature field in mass concrete containing cooling pipes is presented based on the principle of composite element method（CEM）.In this method,a composite element contains several sub-elements which can be cooling pipe elements and concrete elements.The temperature within sub-elements are interpolated from their corresponding mapping nodal temperature,respectively.The solving procedure of the nodal temperatures is similar to that in conventional finite element method,thus the programs for composite element algorithm can be incorporated into the conventional finite element analysis procedure with intrinsic coherence.The effect of each cooling pipe can be well modeled and the difficulty of generating mesh around cooling pipes is avoided.The comparison of the numerical examples between FEM and CEM shows the rationality of the proposed method,and the advantage of CEM in the pre-process is illustrated.

关 键 词：大体积混凝土 温度场 复合单元法 冷却水管 

分 类 号：TV148[水利工程—水力学及河流动力学]