碾压混凝土拱坝温度场计算的浮动网格法

根据碾压混凝土拱坝的施工特点,提出了模拟施工过程计算坝体温度场的三维有限元浮动网格法;根据碾压混凝土的热力学特性,对浮动网格法的可行性和误差进行分析论证;对采用浮动网格法和不采用浮动网格法计算结果进行了对比分析;根据某碾压混凝土拱坝的温度观测资料,对计算成果进行了检验。结果表明:采用三维有限元浮动网格法,既能保证计算精度,又大大提高了计算效率,为碾压混凝土拱坝模拟施工过程进行温度场计算分析提供了有效途径。

Computation on the temperature field of RCC arch dam by means of three-dimensional finite element relocating mesh method

Based on the construction characteristics of rolled compacted concrete arch dam,three-dimensional finite element relocating mesh method was provided to simulate the construction process and computing temperature field of RCC arch dam.According to the thermodynamic properties of RCC,the feasibility and error of the remeshing method is analyzed and demonstrated.The computation results by means of the relocating mesh method and fixed mesh method are compared and analyzed.From the monitoring of temperature data of certain RCC arch dams,the computation results in this paper are verified.The results show that the computed temperature field of RCC arch dam by means of three-dimensional finite element relocating mesh method can not only preserve the numerical accuracy,but also increase the computational efficiency.This indeed provides an effective approach to simulating the actual construction process and computing temperature field of RCC arch dams.