en:user:problem:dyn:start
Table of Contents
Nonlinear dynamics
Computational flowchart
Computational steps
1. Preparing the computation
2. Calculating the mass matrices
3. Processing the loading history and the computational model
Input data are written to the text file name.iP.
The loading history is defined according to the load page.
If the computation has already been performed (i.e., the nonlinear problem has been successfully solved), additional loading can be appended using the $\mathtt{KREST}=2$ key (see load).
4. Solving the system of equations
Input data are written to the text file name.iN. The solution algorithm is the central difference method ($\mathtt{KMET}=1$).
The last iteration of the completed solution is automatically used as the initial approximation for a new run of the program. Before restarting the program, it is possible (but not necessary) to change the input data in the name.iN file.