Stability and accuracy improvement for explicit formulation of time domain acoustic problems

Due to the “wave velocity error” between the discretized model and continuum systems, the accuracy of numerical results using standard finite element method (FEM) in time domain acoustic problems is unsatisfactory with increasing frequency. Such wave velocity error is strongly related to the balance between the “stiffness” and “mass” of discretized systems. By adjusting the location of integration point of mass matrix, the redistribution of the...