Stability analysis of time domain finite element method in computational electromagnetics

In this paper, the stability analysis of time domain finite element method (TDFEM) is presented in computational electromagnetics (CEM). Some useful time discretization schemes, including backward difference, forward difference, central difference and Newmark difference are involved, and then the corresponding. convergences as well as the effects on the numerical precision are also investigated. The selection of parameter β and time step in Newmark method are discussed. Numerical results presented demonstrate that the numerical error can be controlled below 1% with appropriate mesh and large time step.