Keyword type: step
This procedure is used to calculate the Green function due to unit forces at specific nodes in specific global directions. The Green functions are calculated for each unit force separately. The unit forces are defined by a *CLOAD card (the force value specified by the user is immaterial, a unit force is taken). For details the user is referred to Section 6.9.23.
There are two optional parameters: SOLVER and STORAGE. SOLVER specifies which solver is used to perform a decomposition of the linear equation system. This decomposition is done only once. It is repeatedly used in determining all Green functions. The following solvers can be selected:
Default is the first solver which has been installed of the following list: SGI, PARDISO, SPOOLES and TAUCS. If none is installed, a Green function calculation is not possible.
The parameter STORAGE indicates whether the scalar frequencies, Green functions, mass and stiffness matrix should be stored in binary form in file jobname.eig for further use in a *SENSITIVITY procedure. Default is STORAGE=NO. Specify STORAGE=YES if storage is requested.
First line:
Example: *GREEN,SOLVER=PARDISO
defines a Green function step and selects the PARDISO solver as linear equation solver. For this to work, the PARDISO solver must have been linked with CalculiX.
Example files: green1.