Pipe cooling is an important measure for controlling the temperature of mass concrete during the hydration period. In this paper, a new algorithm (partitioned iterative algorithm, PIA) is proposed to address the complicated process of dissecting cooling pipes in mass concrete and the difficulty of balancing the accuracy and efficiency of the simulation. The algorithm is based on the idea of finite element partitioning, where the water pipe element and the concrete element are considered as two computational parts. The coupling is used to consider the heat transfer between the water pipe and the concrete, avoiding the need to solve for the concrete temperature gradient in the vicinity of the pipe, which improves the efficiency of the algorithm. The comparison of the PIA and the discrete iterative algorithm (DIA) results demonstrates the agreement between the two algorithms in terms of computational accuracy and distribution pattern. In addition, the automatic creation and insertion of the pipe elements results in a significant improvement of the overall performance. Finally, the engineering example demonstrates that the results of the PIA at each observation point agree well with the measured values over the entire calculation time. The accuracy of the calculated peak temperature and the peak temperature age can both meet the engineering requirements.

中文翻译：

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基于外埋冷却水管单元的大体积混凝土温度场分区迭代法

管道冷却是控制大体积混凝土水化期温度的重要措施。针对大体积混凝土冷却管道解剖过程复杂、仿真精度和效率难以平衡的问题，提出一种新的算法（分区迭代算法，PIA）。该算法基于有限元划分的思想，将水管单元和混凝土单元视为两个计算部分。耦合用于考虑水管与混凝土之间的热传递，避免了求解管道附近的混凝土温度梯度，提高了算法的效率。PIA 和离散迭代算法 (DIA) 结果的比较证明了两种算法在计算精度和分布模式方面的一致性。此外，管道元素的自动创建和插入可以显着提高整体性能。最后，工程实例表明，PIA 在每个观测点的结果与整个计算时间内的测量值非常吻合。计算出的峰温精度和峰温年龄均能满足工程要求。工程实例表明，PIA 在每个观测点的结果与整个计算时间内的测量值非常吻合。计算出的峰温精度和峰温年龄均能满足工程要求。工程实例表明，PIA 在每个观测点的结果与整个计算时间内的测量值非常吻合。计算出的峰温精度和峰温年龄均能满足工程要求。