A mixed FE-BE method for coupled vibration of gravity dam-reservoir system with variable water depth

摘要

To solve the coupled vibration of a gravity dam-reservoir system with variable water depth by using a hybrid element method, the fluid region with variable water depth needs to be dis- cetized by FE meshes. However, such a method asks for a great computational cost owing to the ex- cessive unknowns, especially when the fluid region with variable water depth is relatively large. To overcome the shortcoming, a refined boundary element method is proposed to analyze the fluid field, in which only the discretization for the boundary of the variable depth region is required. But as a basis of this approach, it is necessary to construct a new Green's function corresponding to an infinite strip region.