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为更高效精确地计算含水管的大体积混凝土温度场,提出一种模型以及合理的热流量积分断面.为了更好地发挥高阶单元和常规8节点单元的优势,该模型应用一种能和常规8节点单元相协调的高阶单元模拟水管周围的混凝土,采用常规的8节点单元模拟其余区域混凝土.分析水管周围混凝土的真实温度梯度分布和计算的温度梯度以得到准确的热流量积分断面.工程实例表明,应用该模型,能准确和高效地计算出混凝土的温度场和水管沿程水温的分布.经分析,进口水温和混凝土的绝热温升对积分断面的位置影响不大,但混凝土导温系数对单元内部合理温度梯度所在的区域的影响仍需在后续工作中做进一步研究.
In order to calculate the temperature field of mass concrete in a water-filled pipe more efficiently and accurately, a model and a reasonable integral of heat flux are proposed.In order to give full play to the advantages of high-order elements and conventional 8-node elements, Conventional 8-node unit is used to simulate the concrete in the remaining area by simulating the concrete around the water pipe with the conventional high-order unit of 8-node unit, and the real temperature gradient distribution and the calculated temperature gradient of the concrete around the water pipe are analyzed to get the accurate integral section of heat flow. The engineering example shows that the model can accurately and efficiently calculate the temperature field of concrete and the distribution of water temperature along the water pipe.The imported water temperature and the adiabatic temperature rise of concrete have little effect on the position of the integral section, The influence of the temperature coefficient on the region where the reasonable temperature gradient inside the unit is located still needs to be further studied in the follow-up work.