含冷却水管混凝土坝温度计埋设位置优选

发布时间：2018-07-08 17:50

本文选题：混凝土坝 + 浇筑仓　；参考：《水利水运工程学报》2017年03期

【摘要】：在水工混凝土坝温控过程中,以温度计实测温度表征混凝土浇筑仓的平均温度,则可方便准确地监控混凝土浇筑仓的温度。结合1.0 m×1.0 m,1.5 m×1.5 m,1.0 m×1.5 m,2.0 m×1.5 m四种典型水管间距的混凝土棱柱体模型,首先采用水管冷却有限元法进行温度场仿真计算,接着选取含冷却水管混凝土模型典型截面,并通过引入四边形12节点等参单元来简化获取截面内任意点温度,然后建立温度计位置优选模型,最后采用优化算法求解获得最优的温度计几何位置。算例分析表明,在混凝土浇筑仓内存在多个位置的温度历程与浇筑仓平均温度历程接近,1.0 m×1.5 m截面的温度计位置分布近似为线性分布,其他截面为抛物线分布。在这些位置处埋设温度计,所测温度可较好地表征浇筑仓的平均温度,供温度监控参考。
[Abstract]:In the process of temperature control of hydraulic concrete dam, it is convenient and accurate to monitor the temperature of concrete pouring silo if the average temperature of concrete pouring silo is represented by temperature measured by thermometer. Combined with the concrete prism model of 1.0 m 脳 1.0 m 脳 1.5 mU 1.0 m 脳 1.5 mU 2.0 m 脳 1.5 m water pipe spacing, the temperature field was calculated by the finite element method of pipe cooling, and then the typical section of the concrete model containing cooling water pipe was selected. The quadrilateral 12-node isoparametric element is introduced to get the temperature of any point in the section. Then the optimal position selection model of the thermometer is established and the optimal geometric position of the thermometer is obtained by using the optimization algorithm. The analysis of numerical examples shows that the temperature history with multiple positions in the concrete pouring silo and the average temperature history of the pouring silo are close to the linear distribution of the thermometer position distribution of 1.0 m 脳 1.5 m section, while the other sections are parabola distribution. The temperature measured by embedding thermometer at these locations can better characterize the average temperature of the pouring silo and provide reference for temperature monitoring.
【作者单位】：三峡大学水利与环境学院;
【基金】：国家自然科学基金资助项目(51209124)
【分类号】：TV544

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