FEFS
; program control IP KREST KSOL
; optional real parameters RP PIVAL
; end of input data EN EN
| $\mathtt{KREST}$ | The key of restart. | |
|---|---|---|
| $=1$ | assemble and eliminate the global stiffness matrix, then solve for all load cases | |
| $=2$ | only solve for additional load cases | |
| $\mathtt{KSOL}$ | The key of linear solution method. | |
| $=1$ | direct frontal solver (default) | |
| $=2$ | parallel sparse direct solver | |
| $\mathtt{PIVAL}$ | The minimum allowed pivot value in the matrix factorization. The default value is $10^{-6}.$ | |
The prerequisites for using $\mathtt{KREST}=2$ are:
i) the global stiffness matrix has already been eliminated, i.e., the program has run at least once with $\mathtt{KREST}=1,$
ii) the additionally entered load cases have already been processed with $\mathtt{KREST}=2,$
iii) the additional right-hand side vectors have already been assembled with $\mathtt{KREST}=2.$