h-型自适应有限元法计算重力坝应力的能量误差控制标准

Because now there isn’t still the corresponding stress control criterion of gravity dam, this paper applies adaptive FEM to the study, the energy error limit control criterion based on h-version adaptive FEM was put forward according to adaptive computation of L plate and gravity dam. The linear elastic adaptive FEM calculation results show that the stress singularity of dam heel doesn’t affect the convergence of adaptive computation, the different original grids and control parameters of mesh size can achieve the approximate results, satisfactory result is obtained if the appropriate energy error limit is adopted, and the stresses at dam heel zone converge to the stable values.