混凝土内部温度场的细观数值模拟研究
发布时间：2018-08-05 16:14
【摘要】：通过对混凝土热传导的细观特性分析,探讨混凝土的非均质特性对热传导过程的影响规律.假定混凝土由砂浆、粗骨料以及二者界面过渡区(ITZ)组成,利用Voronoi单元剖分技术建立细观格构网络模型,是开展热传导过程研究的新途径.基于非线性分析的热传导方程,利用伽略金加权余数法和有限差分法,确定其方程的数值形式,以水泥砂浆与花岗岩为例,开展了基于细观格构网络模型的混凝土热传导过程数值仿真分析.数值计算表明,混凝土的细观格构网络模型可有效地呈现其热传导过程,并可确定其内部温度场分布规律.
[Abstract]:The influence of heterogeneity of concrete on the process of heat conduction is discussed by analyzing the meso-characteristics of heat conduction of concrete. Assuming that concrete is composed of mortar, coarse aggregate and (ITZ) in the interfacial transition zone, it is a new way to study the heat conduction process by using Voronoi element division technique to establish mesoscopic lattice network model. Based on the heat conduction equation of nonlinear analysis, the numerical form of the equation is determined by Galerkin weighted remainder method and finite difference method, taking cement mortar and granite as examples. Numerical simulation analysis of heat conduction process of concrete based on mesoscopic lattice network model is carried out. Numerical results show that the mesoscale lattice network model of concrete can effectively present its heat conduction process and determine its internal temperature field distribution.
【作者单位】： 大连理工大学海岸和近海工程国家重点实验室;
【基金】：国家自然科学基金面上项目(编号:51378090) 国家重点基础研究发展计划(973计划)(编号:2015CB057703) 国家重点实验室开放基金资助项目(编号:2016CEM007)
【分类号】：TU528
本文编号：2166313
[Abstract]:The influence of heterogeneity of concrete on the process of heat conduction is discussed by analyzing the meso-characteristics of heat conduction of concrete. Assuming that concrete is composed of mortar, coarse aggregate and (ITZ) in the interfacial transition zone, it is a new way to study the heat conduction process by using Voronoi element division technique to establish mesoscopic lattice network model. Based on the heat conduction equation of nonlinear analysis, the numerical form of the equation is determined by Galerkin weighted remainder method and finite difference method, taking cement mortar and granite as examples. Numerical simulation analysis of heat conduction process of concrete based on mesoscopic lattice network model is carried out. Numerical results show that the mesoscale lattice network model of concrete can effectively present its heat conduction process and determine its internal temperature field distribution.
【作者单位】： 大连理工大学海岸和近海工程国家重点实验室;
【基金】：国家自然科学基金面上项目(编号:51378090) 国家重点基础研究发展计划(973计划)(编号:2015CB057703) 国家重点实验室开放基金资助项目(编号:2016CEM007)
【分类号】：TU528
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