HROPT

HROPT, Method, MAXMODE, MINMODE, MCout, Damp
Specifies harmonic analysis options.

SOLUTION: Dynamic Options
Compatible Products: – | – | Premium | Enterprise | Ent PP | Ent Solver | – – | Premium | Enterprise | Ent PP | Ent Solver | –

Method

Solution method for the harmonic analysis:

AUTO

 — 

Automatically select the most efficient method. Either the FULL method or the Variational Technology method is selected depending on the model. (default method).

FULL

 — 

Full method.

MSUP

 — 

Mode-superposition method.

VT

 — 

Variational Technology method (based on FULL harmonic algorithm).

VTPA

 — 

Variational Technology perfect absorber method (based on FULL harmonic algorithm).

VTRU

 — 

Variational Technology reuse method (based on FULL harmonic algorithm).

If the solution method is not specified by the user, the program automatically selects either the Full method or the Variational Technology, depending on which method is most efficient for the model.

The Variational Technology reuse method (Method = VTRU) simply does the stress pass of a previous run using the Variational Technology method (Method = VT) using the .RSX file. It can be used to refine the frequency range and sample density without needing to redo the entire analysis.

MAXMODE

Largest mode number to be used to calculate the response (for Method = MSUP only). Defaults to the highest mode calculated in the preceding modal analysis.

MINMODE

Smallest mode number to be used (for Method = MSUP only). Defaults to 1.

MCout

Modal coordinates output key (valid only for the mode superposition method MSUP):

NO

 — 

No output of modal coordinates (default).

YES

 — 

Output modal coordinates to the text file jobname.MCF.

Note:  MCout provides a singular (one-time) output of the modal coordinates. It will not provide the information for LSWRITE/LSSOLVE operations.

Damp

Damping mode for frequency-dependent material properties (valid only for the Variational Technology Method VT).

Hysteretic

 — 

Not proportional to the frequency.

Viscous

 — 

Proportional to the frequency (default).

Notes

Specifies the method of solution for a harmonic analysis (ANTYPE,HARMIC). If used in SOLUTION, this command is valid only within the first load step. See the product restrictions indicated below.

For cyclic symmetry mode-superposition harmonic solutions, MAXMODE and MINMODE are ignored.

To include residual vectors in your mode-superposition harmonic analysis, specify RESVEC,ON.

This command is also valid in PREP7.

Distributed ANSYS Restriction The VTRU method is not supported.

Menu Paths

Main Menu>Preprocessor>Loads>Analysis Type>Analysis Options
Main Menu>Solution>Analysis Type>Analysis Options

Release 18.2 - © ANSYS, Inc. All rights reserved.