POWERFLOW

I/O Options Entry

POWERFLOW – Output Request

Description

The POWERFLOW command can be used in the I/O Options section to request output of the power flow field.

Format

POWERFLOW (format,peakoutput) = option

Argument	Options	Description
format	<H3D> Default = H3D	H3D:	Results are output in Hyper3D format (.h3d file).

peakoutput	<PEAKOUT> Default = blank	If PEAKOUT is present, only the filtered frequencies from the PEAKOUT card will be considered for this output.

option	<YES, ALL, NO, NONE, SID> Default = ALL	YES, ALL, blank:	Power flow field is output for all elements.
		NO, NONE:	Power flow field is not output.
		SID:	If a set ID is given, power flow field is output only for the contents of that set.

Comments

1.	Power flow field output is only available to the .h3d file.

The power flow field indicates the magnitude and direction of vibrational energy which travels in dynamically loaded structures. It helps with identifying the energy transmission paths as well as the vibration sources and energy sinks. Structural intensity, defined as the power flow per unit area, is also available.

3.	The references used in the calculation of the power flow field are listed in the References section of the User’s Guide.