Which explicit method is used in the RF-DYNAM Pro - Nonlinear Time History add-on module?
It should be noted that not the "original" version of the central difference method is used here, but a modified form. The modified form is characterized by the fact that it is simply not a central difference when applying the speed difference. The following two equations show the applied speed and acceleration differences.
Speed: (no central difference)
Acceleration: (central difference)
This approach leads to a faster convergence since it responds "faster" to changes in loading or structure (nonlinearities).
explicit method, dynamic analysis, central difference method