TRNOPT, Method,
MAXMODE, --,
MINMODE, MCout,
TINTOPT, VAout,
DMPSFreq
Specifies transient analysis options.
MethodSolution method for the transient analysis:
FULL | — | Full method (default). |
MSUP | — | Mode-superposition method. |
MAXMODELargest mode number to be used to calculate the response
(for Method = MSUP). Defaults to the highest
mode calculated in the preceding modal analysis.
--Unused field.
MINMODESmallest mode number to be used (for Method = MSUP). Defaults to 1.
MCoutModal coordinates output key (valid only for the mode-superposition method):
NO | — | No output of modal coordinates (default). |
YES | — | Output modal coordinates to the text file Jobname.MCF. |
TINTOPTTime integration method for the transient analysis:
NMK or 0 | — | Newmark algorithm (default). |
HHT or 1 | — | HHT algorithm (valid only for the full transient method). |
VAoutVelocities and accelerations output key (valid only for mode-superposition transient analysis):
NO | — | No output of velocities and accelerations (default). |
YES | — | Write velocities and accelerations. |
DMPSFreqAverage excitation frequency (Hz) for the calculation of equivalent viscous damping from structural damping input (DMPSTR and MP,DMPR). See Damping for more details. Defaults to zero and structural damping is ignored.
Specifies transient analysis (ANTYPE,TRANS) options. If used in SOLUTION, this command is valid only within the first load step. Use the TINTP command to set transient integration parameters.
To include residual vectors in your mode-superposition transient analysis
(Method = MSUP), specify RESVEC,ON.
Method = MSUP is not available for ocean loading.
This command is also valid in PREP7.
Additional product restrictions for the TRNOPT command are shown in the table below.
| Command Option Method | Available Products |
| FULL (DOF = Structural) | – | – | Enterprise | Ent PP | Ent Solver | – |
| FULL (DOF = Temp) | Pro | Premium | Enterprise | Ent PP | Ent Solver | – |
| MSUP | – | Premium | Enterprise | Ent PP | Ent Solver | – |