EMAT simulations based on a two-dimensional FEM coupled electro-mechanical formulation

2次元有限要素法による電磁超音波探触子(EMAT)の電磁場・音響連成シミュレーション

Garcia Rodriguez, D.; Mihalache, O. ; 上田 雅司 

Garcia Rodriguez, D.; Mihalache, O.; Ueda, Masashi

This work presents the development of a new approach to EMAT finite element method (FEM) simulations by using a coupled electromagnetic-mechanical equation system. Validation is performed within the limits of the un-coupled equations using commercially available FEM codes. The advantages and drawbacks of the new method versus the traditional un-coupled approach are evaluated for various EMAT time-transient patterns. Numerical FEM analyses using either a sparse direct solver or an iterative one are investigated with both implicit and explicit time integration methods.