SpectraSim Documentation
Parameter · 07 Run Settings

Acoustic modes

acoustics.modal.enabled Step 07 · Run Settings

Acoustic modes: part of the acoustic modal analysis.

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Theory

Computes the eigenfrequencies and mode shapes of the model before the sweep. The method is in Acoustic modal analysis: eigenfrequencies, damping, participation.

Equations

Kt ϕ=ω2Mt ϕK_t\,\phi = \omega^2 M_t\,\phi
(1)
wheremeaningunit
Kt,MtK_t, M_tStiffness and mass of the systemvarious
ϕ\phiMode shape-
ω\omegaAngular eigenfrequencyrad/s

Default and rule

Default
off
Rule

Off.

Valid range on | off

Range

on | off.