Parameter · 07 Run Settings

Ports during the modal analysis

acoustics.modal.ports Step 07 · Run Settings

Ports during the modal analysis: part of the acoustic modal analysis.

Last updated 2026-11-11

Theory

Rigid closes the port faces, open sets zero pressure on them, anechoic adds the absorbing port term of the sweep (damped modes only). See Acoustic modal analysis: eigenfrequencies, damping, participation.

K_t\,\phi = \omega^2 M_t\,\phi

(1)

where	meaning	unit
$K_t, M_t$	Stiffness and mass of the system	various
$\phi$	Mode shape	-
$\omega$	Angular eigenfrequency	rad/s

Range

rigid | open | anechoic.