spunit

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

Defines the type of multi-point response spectrum.

APDL Command: SPUNIT

Parameters
tblno

Input table number.

type_

Label identifying the type of spectrum:

DISP - Displacement spectrum (SPVAL values interpreted as displacements with units of

length).

VELO - Velocity spectrum (SPVAL values interpreted as velocities with units of

length/time).

ACEL - Acceleration spectrum (SPVAL values interpreted as accelerations with units of

length/time2).

ACCG - Acceleration spectrum (SPVAL values interpreted as accelerations with units of

g/time2).

FORC - Force spectrum.

PRES - Pressure spectrum.

gvalue

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

keyinterp

Key to activate or deactivate the linear interpolation between input response spectrum points and input response spectrum curves:

0 (OFF or NO) - Deactivate linear and use logarithmic interpolation. This value is the default.

1 (ON or YES) - Activate linear interpolation.

Notes

Defines the type of multi-point response spectrum defined by the SPFREQ and SPVAL 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.