Digital Simulation Of Transient SH-Scattering By The Triangular Hill With Circular Holes

Given the dam structure in engineering application, we studied the ground hill and other similar constructions in this thesis, by abstracting the dam structure to the model of triangular hill with holes. The scattering problems and the dynamic stress concentration problems of SH-wave by triangular hill in near field with the method of FEM were presented. First, we discussed relative theory and formulas about the FEM, which was issued by finite element method, and wave FEM method. Secondly, on the basis of the relative principles, we emphatically introduced the artificial boundary problem, space-time dispersing, as well as the solutions to reduce err. In additional, the problems of load's infliction and model's size, which influents the outcome, were researched.On virtue of the theories above, and the FEM software-ANSYS, we got some solutions to three models. The model's displacement and stress solution vs. time and the dynamic stress concentration at the edge of triangular hill were obtained and discussed in this thesis. Response characteristics under SH-wave, and the feasibility which SH-wave problem can be simulated by FEM, were analyzed. Some proposals to the project practices were put forward.