Advanced Finite Element Solutions for Simulating Dynamic Response and Structural Modifications FEMtools Dynamics contains tools for Complex modes analysis, Superelement analysis, Frequency response function (FRF) analysis, Harmonic response analysis, Structural dynamics modification. The solvers of FEMtools grant high-perfomance on Windows and Linux, 32 and 64 bit platform. Supports NASTRAN, ANSYS, ABAQUS and UNIVERSAL FILE models, element matrix and results.