Composite element algorithm for the thermal analysis of mass concrete Simulation of cooling pipes
Composite element algorithm for the thermal analysis of mass concrete Simulation of cooling pipes
复制标题
大体积混凝土热分析的复合单元算法 冷却管模拟
DOI：
10.1108/09615531111123100
复制
发表时间：
2011-01-01
影响因子：
4.2
通讯作者：
Shahrour, Isam
中科院分区：
文献类型：
--
作者：
Chen, Sheng-hong;Su, Peifang;Shahrour, Isam
目的管道冷却是控制大体积混凝土温度的重要措施.由于大体积混凝土中冷却管的温度场是三维的、非稳态的，且冷却管数量庞大，因此研究高效可靠的温度场计算方法至关重要。本文的目的是发展含冷却管的大体积混凝土温度场的复合单元法（CEM）.设计/方法/途径--将每一段冷却管看作一个特殊的子单元，具有确定的热特性，它明确地位于复合单元内，通过变分原理，建立了含有冷却管的复合单元的控制方程。该方法的一个显著优点是可以显式地模拟每一根冷却管，而网格划分的难度独创性/价值-本文演示了如何包含冷却管的复合单元退化到传统的有限元自动当第一阶段人工冷却结束，相反，传统的有限元也可以转换为复合单元自动当第二阶段人工冷却开始。算例的比较表明了本文方法的合理性。
Purpose Pipe - cooling is an important measure for controlling the temperature in mass concrete. Since the temperature field in mass concrete containing cooling pipes is unsteady and three-dimensional, and there are huge quantities of the cooling pipes in the concrete, the study of efficient and reliable algorithm is crucial. The purpose of this paper is to develop the composite element method (CEM) for the temperature field in mass concrete containing cooling pipes.Design/methodology/approach - Each cooling pipe segment is looked at as a special sub-element having definite thermal characteristics, which is located explicitly within the composite element By the variational principle, the governing equation for the composite element containing cooling pipes is established.Findings - One of the remarkable advantages of the method proposed is that each cooling pipe can be simulated explicitly while the difficulty of mesh generation around cooling pipes can be avoided.Originality/value - The paper demonstrates how composite elements containing cooling pipes are degenerated to the conventional finite elements automatically when the first stage artificial cooling finished, and conversely, the conventional finite elements can also be transformed to the composite elements automatically when the second stage artificial cooling started. The comparison of the numerical example using FEM and CEM shows the rationality of the proposed method.