**LVSCALE****LVSCALE**, `FACT`

, `LDSTEP`

**Scales the load vector for mode-superposition analyses.**

`FACT`

Scale factor applied to both the real and imaginary
(if they exist) components of the load vector. Defaults to 0.0.

`LDSTEP`

Specifies the load step number from the modal analysis (**MODCONT**,ON). It
corresponds to the load vector number. Defaults to 1. The
maximum admissible value is the number of vectors written in the
**Jobname.MODE** file.

## Command Default

No load vector is applied.

## Notes

Specifies the scale factor for the load
vector that was created in a modal (**ANTYPE**,MODAL)
analysis. Applies only to the mode-superposition transient analysis
(**ANTYPE**,TRANS), mode-superposition harmonic analysis
(**ANTYPE**,HARMIC), random vibration analysis (**ANTYPE**,SPECTR with **SPOPT**,PSD), and multiple
point response spectrum analysis (**ANTYPE**,SPECTR
with **SPOPT**,MPRS). For PSD and MPRS analyses, **LVSCALE** is only applicable for pressure loading.

The **LVSCALE** command supports tabular boundary
conditions (%TABNAME_X%) for `FACT`

input
values only as a function of time in the mode-superposition transient
(**ANTYPE**,TRANS) or as a function of frequency in
mode-superposition harmonic (**ANTYPE**,HARMIC).

MPC contact generates constraint equations that can include constant terms (included
on the right-hand side of the system equation). The **LVSCALE** command scales the constant terms.

In mode-superposition transient and harmonic
analyses, all of the load vectors need to be scaled in the first load
step. Use a zero scale factor if they are not actually used in this
first load step. Similarly, in random vibration and multipoint
response spectrum analyses, all of the load vectors need to be scaled
in the first participation factor calculation (**PFACT**). Use a zero scale factor if they are not actually used for
the first input table.

This command is also valid in PREP7.