Analysis of Boundary Treatment and Meshing Method for 2.5D Finite Element Method

Abstract:

As the good performance of the calculation efficiency in the wave propagation simulation, the 2.5D finite element method (FEM) was introduced and coupled with sum of the boundary treatment methods like infinite element method (IFE). In order to analyze the influences of the FEM meshing area and element size to the simulation accuracy. Based on the 2.5D method, the FEM IFE coupled method was fulfilled in Matlab and ANSYS platform. A comparison with the visco boundary treatment show that with the above method results of higher accuracy are ottained than that of the visco boundary. And meanwhile, the reasonable FEM modeling domain and FEM element size are proposed by comparing the simulation results with the classic analytic solution.