The linear implicit Newmark solver or the linear modal solver is available for the linear time history analysis.
To account for nonlinearities in the time history analysis, RFEM provides the nonlinear implicit Newmark solver (RSTAB: explicit solver for geometrically linear and large deformation analysis).
Although the modal analysis represents a fast algorithm, it is necessary to use a certain number of eigenvalues to ensure the required accuracy of results.
The implicit Newmark analysis is a very precise method, independent of the number of eigenvalues used, but requires sufficient small time steps for the calculation.
