HyperWorks Solvers

RNFLOW

»Click here to display Table of Contents« OptiStruct > Reference Guide > Input Data > I/O Options Section:

RNFLOW
RNFLOW

I/O Options and Subcase Information Entry

RNFLOW – Output Request

Description

The RNFLOW command can be used in the I/O Options or Subcase Information sections to request fatigue damage results output for all fatigue subcases or individual fatigue subcases, respectively.

Format

RNFLOW (format) = option

Argument	Options	Description
format	<OPTI, blank> Default = blank	OPTI:	Results are output in OptiStruct results format (.rnf file).
		blank:	Results are output in all active formats for which the result is available.

option	<YES, ALL, NO, NONE, SID> Default = ALL	YES, ALL, blank:	Results are output for all elements.
		NO, NONE:	Results are not output.
		SID:	If a set ID is specified, results are output only for elements listed in that set.

Comments

1.	Fatigue results via the RNFLOW entry are available only for OPTI format in the .rnf file.

2.	Multiple instances of this card are allowed; if instances are conflicting, the last instance dominates.

3.	This entry can be used to output the Rainflow Cycle count history for a particular fatigue subcase. The Cycle number, Stress Range, Mean Stress, and Damage, for each fatigue event for each element are output to <filename>.fatrf.<subcaseID>.rnf file.

4.	For Multiaxial Fatigue, only proportional multiaxial subcase is supported for RNFLOW output.

See Also:

I/O Options Section

I/O Options by Function