psdunit

Mapdl.psdunit(tblno='', type_='', gvalue='', **kwargs)

Defines the type of input PSD.

APDL Command: PSDUNIT

Parameters
tblno

Input table number.

type_

Label identifying the type of spectrum:

DISP - Displacement spectrum (in terms of displacement2/Hz ).

VELO - Velocity spectrum (in terms of velocity2/Hz ).

ACEL - Acceleration spectrum (in terms of acceleration2/Hz ).

ACCG - Acceleration spectrum (in terms of g2/Hz ).

FORC - Force spectrum (in terms of force2/Hz ).

PRES - Pressure spectrum (in terms of pressure2/Hz ).

gvalue

Value of acceleration due to gravity in any arbitrary units for Type=ACCG. Default is 386.4 in/sec2.

Notes

Defines the type of PSD defined by the PSDVAL, COVAL, and QDVAL commands.

Force (FORC) and pressure (PRES) type spectra can be used only as a nodal excitation.

GVALUE is valid only when type ACCG is specified. A zero or negative value cannot be used. A parameter substitution can also be performed.

This command is also valid in PREP7.